Imported Upstream version 1.3upstream/1.3

17 files changed, 10365 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..ea40d18
--- /dev/null
+++ b/ChangeLog
@@ -0,0 +1,36 @@
+Changes in 1.3
+* Added koremutake method for pronouncible password generation.
+* Moved to MIT license
+
+Changes in 1.2
+* Added cryptlib support
+
+* Added an option to compile with mlock() instead of mlockall().
+  - mlockall() caused problems on some Linux 2.6 distros because it would
+    succeed even for ordinary users. some library component would then
+    try to allocate too much memory which would exceed the process'
+    resource limits for locked memory. being unable to allocate memory has
+    resulted in a crash.
+
+* Minor code improvements:
+  - uses mprotect(PROT_NONE) on the last page of secure memory so that the
+    segmentation fault is guaranteed on buffer overflow
+  - minor cleanups
+
+* Updated manpage
+
+Changes in 1.1 
+* Major security improvements:
+  - memory locking
+  - zeroing "secure" memory on exit
+  - disabling core dumps
+  - dropping root privileges after memory locking
+  - printing a warning if security can't be completely set up
+
+* The program does no buffer length checking. If you try to generate too long
+  passphrase, the program will CRASH because of buffer overrun. For that
+  event to happen the passphrase would have to be long about 3000 characters.
+
+* Major code cleanups.
+
+* Added the manual page.
diff --git a/Makefile.proto b/Makefile.proto
new file mode 100644
index 0000000..e932ed4
--- /dev/null
+++ b/Makefile.proto
@@ -0,0 +1,100 @@
+##############################################################################
+# USER CONFIGURATION
+# You MUST set all of the following variables for the compilation to succeed.
+##############################################################################
+
+##
+# paths to crypto library headers and archives. if they are not in the
+# standard system locations (this really depends on the OS you are using),
+# then UNCOMMENT the CRYPTO_INCLUDE_PATH and CRYPTO_LIBRARY_PATH and add the
+# appropriate paths immediately after -I, resp. -L.
+#
+# OpenSSL
+# -------
+# The include path is the directory containing the openssl include
+# directory (e.g. if OpenSSL is installed in /usr/local/ssl, its include
+# files are in /usr/local/ssl/include/openssl and you must set the
+# CRYPTO_INCLUDE_PATH to -I/usr/local/ssl/include).
+#
+# The library path for OpenSSL is the one containing libcrypto.so or
+# libcrypto.a (e.g. set CRYPTO_LIBRARY_PATH to -L/usr/local/ssl/lib)
+#
+# cryptlib
+# --------
+# The include directory is the one containing the cryptlib.h file.
+# The library path is the one containing libcl.so or libcl.a.
+##
+#CRYPTO_INCLUDE_PATH = -I/replace/this/with/real/path
+#CRYPTO_LIBRARY_PATH = -L/replace/this/with/real/path
+
+##
+# If using OpenSSL, uncomment the following 3 lines.
+##
+#CRYPTO_CFLAGS =
+#CRYPTO_OBJS   = secure_random_openssl.o
+#CRYPTO_LIBS   = -lcrypto
+
+##
+# If using cryptlib, uncomment the following 3 lines.
+##
+#CRYPTO_CFLAGS = -D_REENTRANT
+#CRYPTO_OBJS   = secure_random_cryptlib.o
+#CRYPTO_LIBS   = -lcl -lpthread
+
+##
+# Change PREFIX to install to different directories. The binary is installed
+# in $PREFIX/bin, and the man in $PREFIX/man/man1
+##
+PREFIX = /usr/local
+
+##
+# On some operating systems (most notably Linux 2.6 kernels) using mlockall
+# causes the program to fail with segmentation fault because it tries to
+# allocate memory beyond its current resource limits for locked memory. If
+# you experience crashes immediately at startup, uncomment the following line.
+##
+#
+#NO_MLOCKALL = -DDISABLE_MLOCKALL
+
+##
+# Sometimes you have only dynamic libraries available. In that case COMMENT
+# the following line.
+##
+LINK_STATIC = -static
+
+##############################################################################
+# NO USER MODIFIABLE PARTS AFTER THIS POINT
+##############################################################################
+CFLAGS	= -Wall $(CRYPTO_INCLUDE_PATH) $(CRYPTO_CFLAGS) $(NO_MLOCKALL)
+LDFLAGS	= $(CRYPTO_LIBRARY_PATH) $(LINK_STATIC) $(CRYPTO_LIBS) -lm
+
+.PHONY : all install-strip install clean 
+
+OBJS = diceware8k.o main.o pwgen.o secure_memory_unix.o \
+	$(CRYPTO_OBJS) skeylist.o
+
+all: secpwgen
+
+secpwgen: $(OBJS)
+	$(CC) -o $@ $(OBJS) $(LDFLAGS)
+
+install-strip: secpwgen
+	strip secpwgen
+	$(MAKE) install
+
+install: secpwgen
+	cp -i secpwgen $(PREFIX)/bin
+	cp -i secpwgen.1 $(PREFIX)/man/man1
+
+clean:
+	rm -f *.o secpwgen
+
+diceware8k.o: diceware8k.c
+main.o: main.c secure_memory.h secure_random.h pwgen.h exceptions.h \
+  cexcept.h
+pwgen.o: pwgen.c secure_random.h pwgen.h exceptions.h cexcept.h
+secure_memory_unix.o: secure_memory_unix.c secure_random.h \
+  secure_memory.h exceptions.h cexcept.h
+secure_random_cryptlib.o: secure_random_cryptlib.c exceptions.h cexcept.h
+secure_random_openssl.o: secure_random_openssl.c exceptions.h cexcept.h
+skeylist.o: skeylist.c
diff --git a/README b/README
new file mode 100644
index 0000000..d27b7f5
--- /dev/null
+++ b/README
@@ -0,0 +1,27 @@
+PREREQUISITES
+=============
+You need OpenSSL at least 0.9.7 OR cryptlib 3.1 or later.
+
+HOW
+===
+Copy Makefile.proto to Makefile and edit it according to instructions found
+there.
+
+USAGE
+=====
+Read the secpwgen man page.
+
+NOTE ON VERSIONING
+==================
+Unlike many open-source packages, this program's versioning follows the
+normal DECIMAL NUMBER comparison rules: the following example shows the
+ordering of versions: 0.9 < 1.0 < 1.1 < 1.2 < 1.21 < 1.22xx < 1.3 (some
+time in the future) because the same relations hold for ordinary decimals.
+
+TODO
+====
+Add an option to specify path to EGD socket. This will enable the program to
+provide secure passwords even on crippled systems (with no /dev/{u,}random)
+provided EGD (entropy gathering daemon) is running.
+
+Call OpenSSL Win32 specific function to init the entropy pool.
diff --git a/cexcept.h b/cexcept.h
new file mode 100644
index 0000000..dbea51e
--- /dev/null
+++ b/cexcept.h
@@ -0,0 +1,243 @@
+/*===
+cexcept.h 2.0.0 (2001-Jul-12-Thu)
+Adam M. Costello <amc@cs.berkeley.edu>
+
+An interface for exception-handling in ANSI C (C89 and subsequent ISO
+standards), developed jointly with Cosmin Truta <cosmin@cs.toronto.edu>.
+
+    Copyright (c) 2001 Adam M. Costello and Cosmin Truta.  Everyone
+    is hereby granted permission to do whatever they like with this
+    file, provided that if they modify it they take reasonable steps to
+    avoid confusing or misleading people about the authors, version,
+    and terms of use of the derived file.  The copyright holders make
+    no guarantees regarding this file, and are not responsible for any
+    damage resulting from its use.
+
+Only user-defined exceptions are supported, not "real" exceptions like
+division by zero or memory segmentation violations.
+
+If this interface is used by multiple .c files, they shouldn't include
+this header file directly.  Instead, create a wrapper header file that
+includes this header file and then invokes the define_exception_type
+macro (see below), and let your .c files include that header file.
+
+The interface consists of one type, one well-known name, and six macros.
+
+
+define_exception_type(type_name);
+
+    This macro is used like an external declaration.  It specifies
+    the type of object that gets copied from the exception thrower to
+    the exception catcher.  The type_name can be any type that can be
+    assigned to, that is, a non-constant arithmetic type, struct, union,
+    or pointer.  Examples:
+
+        define_exception_type(int);
+
+        enum exception { out_of_memory, bad_arguments, disk_full };
+        define_exception_type(enum exception);
+
+        struct exception { int code; const char *msg; };
+        define_exception_type(struct exception);
+
+    Because throwing an exception causes the object to be copied (not
+    just once, but twice), programmers may wish to consider size when
+    choosing the exception type.
+
+
+struct exception_context;
+
+    This type may be used after the define_exception_type() macro has
+    been invoked.  A struct exception_context must be known to both
+    the thrower and the catcher.  It is expected that there be one
+    context for each thread that uses exceptions.  It would certainly
+    be dangerous for multiple threads to access the same context.
+    One thread can use multiple contexts, but that is likely to be
+    confusing and not typically useful.  The application can allocate
+    this structure in any way it pleases--automatic, static, or dynamic.
+    The application programmer should pretend not to know the structure
+    members, which are subject to change.
+
+
+struct exception_context *the_exception_context;
+
+    The Try/Catch and Throw statements (described below) implicitly
+    refer to a context, using the name the_exception_context.  It is
+    the application's responsibility to make sure that this name yields
+    the address of a mutable (non-constant) struct exception_context
+    wherever those statements are used.  Subject to that constraint, the
+    application may declare a variable of this name anywhere it likes
+    (inside a function, in a parameter list, or externally), and may
+    use whatever storage class specifiers (static, extern, etc) or type
+    qualifiers (const, volatile, etc) it likes.  Examples:
+
+        static struct exception_context
+          * const the_exception_context = &foo;
+
+        { struct exception_context *the_exception_context = bar; ... }
+
+        int blah(struct exception_context *the_exception_context, ...);
+
+        extern struct exception_context the_exception_context[1];
+
+    The last example illustrates a trick that avoids creating a pointer
+    object separate from the structure object.
+
+    The name could even be a macro, for example:
+
+        struct exception_context ec_array[numthreads];
+        #define the_exception_context (ec_array + thread_id)
+
+    Be aware that the_exception_context is used several times by the
+    Try/Catch/Throw macros, so it shouldn't be expensive or have side
+    effects.  The expansion must be a drop-in replacement for an
+    identifier, so it's safest to put parentheses around it.
+
+
+void init_exception_context(struct exception_context *ec);
+
+    For context structures allocated statically (by an external
+    definition or using the "static" keyword), the implicit
+    initialization to all zeros is sufficient, but contexts allocated
+    by other means must be initialized using this macro before they
+    are used by a Try/Catch statement.  It does no harm to initialize
+    a context more than once (by using this macro on a statically
+    allocated context, or using this macro twice on the same context),
+    but a context must not be re-initialized after it has been used by a
+    Try/Catch statement.
+
+
+Try statement
+Catch (expression) statement
+
+    The Try/Catch/Throw macros are capitalized in order to avoid
+    confusion with the C++ keywords, which have subtly different
+    semantics.
+
+    A Try/Catch statement has a syntax similar to an if/else statement,
+    except that the parenthesized expression goes after the second
+    keyword rather than the first.  As with if/else, there are two
+    clauses, each of which may be a simple statement ending with a
+    semicolon or a brace-enclosed compound statement.  But whereas
+    the else clause is optional, the Catch clause is required.  The
+    expression must be a modifiable lvalue (something capable of being
+    assigned to) of the same type (disregarding type qualifiers) that
+    was passed to define_exception_type().
+
+    If a Throw that uses the same exception context as the Try/Catch is
+    executed within the Try clause (typically within a function called
+    by the Try clause), and the exception is not caught by a nested
+    Try/Catch statement, then a copy of the exception will be assigned
+    to the expression, and control will jump to the Catch clause.  If no
+    such Throw is executed, then the assignment is not performed, and
+    the Catch clause is not executed.
+
+    The expression is not evaluated unless and until the exception is
+    caught, which is significant if it has side effects, for example:
+
+        Try foo();
+        Catch (p[++i].e) { ... }
+
+    IMPORTANT: Jumping into or out of a Try clause (for example via
+    return, break, continue, goto, longjmp) is forbidden--the compiler
+    will not complain, but bad things will happen at run-time.  Jumping
+    into or out of a Catch clause is okay, and so is jumping around
+    inside a Try clause.  In many cases where one is tempted to return
+    from a Try clause, it will suffice to use Throw, and then return
+    from the Catch clause.  Another option is to set a flag variable and
+    use goto to jump to the end of the Try clause, then check the flag
+    after the Try/Catch statement.
+
+    IMPORTANT: The values of any non-volatile automatic variables
+    changed within the Try clause are undefined after an exception is
+    caught.  Therefore, variables modified inside the Try block whose
+    values are needed later outside the Try block must either use static
+    storage or be declared with the "volatile" type qualifier.
+
+
+Throw expression;
+
+    A Throw statement is very much like a return statement, except that
+    the expression is required.  Whereas return jumps back to the place
+    where the current function was called, Throw jumps back to the Catch
+    clause of the innermost enclosing Try clause.  The expression must
+    be compatible with the type passed to define_exception_type().  The
+    exception must be caught, otherwise the program may crash.
+
+    Slight limitation:  If the expression is a comma-expression it must
+    be enclosed in parentheses.
+
+
+Try statement
+Catch_anonymous statement
+
+    When the value of the exception is not needed, a Try/Catch statement
+    can use Catch_anonymous instead of Catch (expression).
+
+
+Everything below this point is for the benefit of the compiler.  The
+application programmer should pretend not to know any of it, because it
+is subject to change.
+
+===*/
+
+
+#ifndef CEXCEPT_H
+#define CEXCEPT_H
+
+
+#include <setjmp.h>
+
+#define define_exception_type(etype) \
+struct exception_context { \
+  jmp_buf *penv; \
+  int caught; \
+  volatile struct { etype etmp; } v; \
+}
+
+/* etmp must be volatile because the application might use automatic */
+/* storage for the_exception_context, and etmp is modified between   */
+/* the calls to setjmp() and longjmp().  A wrapper struct is used to */
+/* avoid warnings about a duplicate volatile qualifier in case etype */
+/* already includes it.                                              */
+
+#define init_exception_context(ec) ((void)((ec)->penv = 0))
+
+#define Try \
+  { \
+    jmp_buf *exception__prev, exception__env; \
+    exception__prev = the_exception_context->penv; \
+    the_exception_context->penv = &exception__env; \
+    if (setjmp(exception__env) == 0) { \
+      if (&exception__prev)
+
+#define exception__catch(action) \
+      else { } \
+      the_exception_context->caught = 0; \
+    } \
+    else { \
+      the_exception_context->caught = 1; \
+    } \
+    the_exception_context->penv = exception__prev; \
+  } \
+  if (!the_exception_context->caught || action) { } \
+  else
+
+#define Catch(e) exception__catch(((e) = the_exception_context->v.etmp, 0))
+#define Catch_anonymous exception__catch(0)
+
+/* Try ends with if(), and Catch begins and ends with else.  This     */
+/* ensures that the Try/Catch syntax is really the same as the        */
+/* if/else syntax.                                                    */
+/*                                                                    */
+/* We use &exception__prev instead of 1 to appease compilers that     */
+/* warn about constant expressions inside if().  Most compilers       */
+/* should still recognize that &exception__prev is never zero and     */
+/* avoid generating test code.                                        */
+
+#define Throw \
+  for (;; longjmp(*the_exception_context->penv, 1)) \
+    the_exception_context->v.etmp =
+
+
+#endif /* CEXCEPT_H */
diff --git a/diagnostics.h b/diagnostics.h
new file mode 100644
index 0000000..8b5d820
--- /dev/null
+++ b/diagnostics.h
@@ -0,0 +1,41 @@
+/*
+  diagnostics.h - standard error codes and messages
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#ifndef DIAGNOSTICS_H__
+#define DIAGNOSTICS_H__
+
+#define	I01	"destroying secure memory"
+#define	W01	"using insecure memory"
+#define	E01	"N must be an integer > 0"
+#define F01	"out of memory"
+#define	F02	"system call failed"
+#define F03	"unhandled exception"
+#define F04	"can't drop privileges"
+
+#define IWDIAG(x, ...) fprintf(stderr, "%s: %s:\n", #x, x, __VA_ARGS__)
+#define EFDIAG(x, ...) do { \
+	fprintf(stderr, "%s: %s\n", #x, __VA_ARGS__);\
+	exit(EXIT_FAILURE);\
+}
+
+#endif	/* DIAGNOSTICS_H__ */
diff --git a/diceware8k.c b/diceware8k.c
new file mode 100644
index 0000000..6cefa03
--- /dev/null
+++ b/diceware8k.c
@@ -0,0 +1,8201 @@
+/*  Diceware 8k Word List in C 
+	Arnold G. Reinhold
+	2000-10-23 */
+
+static const char * Dicewds8k[] =
+{"a",
+"a&p",
+"a's",
+"a2",
+"a3",
+"a4",
+"a5",
+"a6",
+"a7",
+"a8",
+"a9",
+"aa",
+"aaa",
+"aaaa",
+"aaron",
+"ab",
+"aba",
+"ababa",
+"aback",
+"abase",
+"abash",
+"abate",
+"abbas",
+"abbe",
+"abbey",
+"abbot",
+"abbott",
+"abc",
+"abe",
+"abed",
+"abel",
+"abet",
+"abide",
+"abject",
+"ablaze",
+"able",
+"abner",
+"abo",
+"abode",
+"abort",
+"about",
+"above",
+"abrade",
+"abram",
+"absorb",
+"abuse",
+"abut",
+"abyss",
+"ac",
+"acadia",
+"accra",
+"accrue",
+"ace",
+"acetic",
+"ache",
+"acid",
+"acidic",
+"acm",
+"acme",
+"acorn",
+"acre",
+"acrid",
+"act",
+"acton",
+"actor",
+"acts",
+"acuity",
+"acute",
+"ad",
+"ada",
+"adage",
+"adagio",
+"adair",
+"adam",
+"adams",
+"adapt",
+"add",
+"added",
+"addict",
+"addis",
+"addle",
+"adele",
+"aden",
+"adept",
+"adieu",
+"adjust",
+"adler",
+"admit",
+"admix",
+"ado",
+"adobe",
+"adonis",
+"adopt",
+"adore",
+"adorn",
+"adult",
+"advent",
+"advert",
+"advise",
+"ae",
+"aegis",
+"aeneid",
+"af",
+"afar",
+"affair",
+"affine",
+"affix",
+"afire",
+"afoot",
+"afraid",
+"africa",
+"afro",
+"aft",
+"ag",
+"again",
+"agate",
+"agave",
+"age",
+"agee",
+"agenda",
+"agent",
+"agile",
+"aging",
+"agnes",
+"agnew",
+"ago",
+"agone",
+"agony",
+"agree",
+"ague",
+"agway",
+"ah",
+"ahead",
+"ahem",
+"ahoy",
+"ai",
+"aid",
+"aida",
+"aide",
+"aides",
+"aiken",
+"ail",
+"aile",
+"aim",
+"ain't",
+"ainu",
+"air",
+"aires",
+"airman",
+"airway",
+"airy",
+"aisle",
+"aj",
+"ajar",
+"ajax",
+"ak",
+"akers",
+"akin",
+"akron",
+"al",
+"ala",
+"alai",
+"alamo",
+"alan",
+"alarm",
+"alaska",
+"alb",
+"alba",
+"album",
+"alcoa",
+"alden",
+"alder",
+"ale",
+"alec",
+"aleck",
+"aleph",
+"alert",
+"alex",
+"alexei",
+"alga",
+"algae",
+"algal",
+"alger",
+"algol",
+"ali",
+"alia",
+"alias",
+"alibi",
+"alice",
+"alien",
+"alight",
+"align",
+"alike",
+"alive",
+"all",
+"allah",
+"allan",
+"allay",
+"allen",
+"alley",
+"allied",
+"allis",
+"allot",
+"allow",
+"alloy",
+"allure",
+"ally",
+"allyl",
+"allyn",
+"alma",
+"almost",
+"aloe",
+"aloft",
+"aloha",
+"alone",
+"along",
+"aloof",
+"aloud",
+"alp",
+"alpha",
+"alps",
+"also",
+"alsop",
+"altair",
+"altar",
+"alter",
+"alto",
+"alton",
+"alum",
+"alumni",
+"alva",
+"alvin",
+"alway",
+"am",
+"ama",
+"amass",
+"amaze",
+"amber",
+"amble",
+"ambush",
+"amen",
+"amend",
+"ames",
+"ami",
+"amid",
+"amide",
+"amigo",
+"amino",
+"amiss",
+"amity",
+"amman",
+"ammo",
+"amoco",
+"amok",
+"among",
+"amort",
+"amos",
+"amp",
+"ampere",
+"ampex",
+"ample",
+"amply",
+"amra",
+"amulet",
+"amuse",
+"amy",
+"an",
+"ana",
+"and",
+"andes",
+"andre",
+"andrew",
+"andy",
+"anent",
+"anew",
+"angel",
+"angelo",
+"anger",
+"angie",
+"angle",
+"anglo",
+"angola",
+"angry",
+"angst",
+"angus",
+"ani",
+"anion",
+"anise",
+"anita",
+"ankle",
+"ann",
+"anna",
+"annal",
+"anne",
+"annex",
+"annie",
+"annoy",
+"annul",
+"annuli",
+"annum",
+"anode",
+"ansi",
+"answer",
+"ant",
+"ante",
+"anti",
+"antic",
+"anton",
+"anus",
+"anvil",
+"any",
+"anyhow",
+"anyway",
+"ao",
+"aok",
+"aorta",
+"ap",
+"apart",
+"apathy",
+"ape",
+"apex",
+"aphid",
+"aplomb",
+"appeal",
+"append",
+"apple",
+"apply",
+"april",
+"apron",
+"apse",
+"apt",
+"aq",
+"aqua",
+"ar",
+"arab",
+"araby",
+"arc",
+"arcana",
+"arch",
+"archer",
+"arden",
+"ardent",
+"are",
+"area",
+"arena",
+"ares",
+"argive",
+"argo",
+"argon",
+"argot",
+"argue",
+"argus",
+"arhat",
+"arid",
+"aries",
+"arise",
+"ark",
+"arlen",
+"arlene",
+"arm",
+"armco",
+"army",
+"arnold",
+"aroma",
+"arose",
+"arpa",
+"array",
+"arrear",
+"arrow",
+"arson",
+"art",
+"artery",
+"arthur",
+"artie",
+"arty",
+"aruba",
+"arum",
+"aryl",
+"as",
+"ascend",
+"ash",
+"ashen",
+"asher",
+"ashley",
+"ashy",
+"asia",
+"aside",
+"ask",
+"askew",
+"asleep",
+"aspen",
+"aspire",
+"ass",
+"assai",
+"assam",
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+"xyz",
+"xz",
+"y",
+"y's",
+"y2",
+"y3",
+"y4",
+"y5",
+"y6",
+"y7",
+"y8",
+"y9",
+"ya",
+"yacht",
+"yah",
+"yak",
+"yale",
+"yalta",
+"yam",
+"yamaha",
+"yang",
+"yank",
+"yap",
+"yaqui",
+"yard",
+"yarn",
+"yates",
+"yaw",
+"yawl",
+"yawn",
+"yb",
+"yc",
+"yd",
+"ye",
+"yea",
+"yeah",
+"year",
+"yearn",
+"yeast",
+"yeasty",
+"yeats",
+"yell",
+"yelp",
+"yemen",
+"yen",
+"yet",
+"yf",
+"yg",
+"yh",
+"yi",
+"yield",
+"yin",
+"yip",
+"yj",
+"yk",
+"yl",
+"ym",
+"ymca",
+"yn",
+"yo",
+"yodel",
+"yoder",
+"yoga",
+"yogi",
+"yoke",
+"yokel",
+"yolk",
+"yon",
+"yond",
+"yore",
+"york",
+"yost",
+"you",
+"you'd",
+"young",
+"your",
+"youth",
+"yow",
+"yp",
+"yq",
+"yr",
+"ys",
+"yt",
+"yu",
+"yucca",
+"yuck",
+"yuh",
+"yuki",
+"yukon",
+"yule",
+"yv",
+"yves",
+"yw",
+"ywca",
+"yx",
+"yy",
+"yyy",
+"yyyy",
+"yz",
+"z",
+"z's",
+"z2",
+"z3",
+"z4",
+"z5",
+"z6",
+"z7",
+"z8",
+"z9",
+"za",
+"zag",
+"zaire",
+"zan",
+"zap",
+"zazen",
+"zb",
+"zc",
+"zd",
+"ze",
+"zeal",
+"zealot",
+"zebra",
+"zeiss",
+"zen",
+"zero",
+"zest",
+"zesty",
+"zeta",
+"zeus",
+"zf",
+"zg",
+"zh",
+"zi",
+"zig",
+"zilch",
+"zinc",
+"zing",
+"zion",
+"zip",
+"zj",
+"zk",
+"zl",
+"zloty",
+"zm",
+"zn",
+"zo",
+"zoe",
+"zomba",
+"zone",
+"zoo",
+"zoom",
+"zorn",
+"zp",
+"zq",
+"zr",
+"zs",
+"zt",
+"zu",
+"zurich",
+"zv",
+"zw",
+"zx",
+"zy",
+"zz",
+"zzz",
+"zzzz",
+"!",
+"!!",
+"""""",
+"#",
+"##",
+"$",
+"$$",
+"%",
+"%%",
+"&",
+"(",
+"()",
+")",
+"*",
+"**",
+"+",
+"-",
+"0",
+"1",
+"10",
+"100",
+"1000",
+"100th",
+"101",
+"101st",
+"10th",
+"11",
+"111",
+"1111",
+"11th",
+"12",
+"123",
+"1234",
+"12th",
+"13",
+"13th",
+"14",
+"1492",
+"14th",
+"15",
+"1500",
+"15th",
+"16",
+"1600",
+"16th",
+"17",
+"1700",
+"1776",
+"17th",
+"18",
+"1800",
+"1812",
+"18th",
+"19",
+"1900",
+"1910",
+"1920",
+"1925",
+"1930",
+"1935",
+"1940",
+"1945",
+"1950",
+"1955",
+"1960",
+"1965",
+"1970",
+"1975",
+"1980",
+"1985",
+"1990",
+"1991",
+"1992",
+"1993",
+"1994",
+"1995",
+"1996",
+"1997",
+"19th",
+"1st",
+"2",
+"20",
+"200",
+"2000",
+"2001",
+"2020",
+"20th",
+"21",
+"21st",
+"22",
+"222",
+"2222",
+"22nd",
+"23",
+"234",
+"2345",
+"23rd",
+"24",
+"2468",
+"24th",
+"25",
+"25th",
+"26",
+"26th",
+"27",
+"27th",
+"28",
+"28th",
+"29",
+"29th",
+"2a",
+"2b",
+"2c",
+"2d",
+"2e",
+"2f",
+"2g",
+"2h",
+"2i",
+"2j",
+"2k",
+"2l",
+"2m",
+"2n",
+"2nd",
+"2o",
+"2p",
+"2q",
+"2r",
+"2s",
+"2t",
+"2u",
+"2v",
+"2w",
+"2x",
+"2y",
+"2z",
+"3",
+"30",
+"300",
+"3000",
+"30th",
+"31",
+"31st",
+"32",
+"32nd",
+"33",
+"333",
+"3333",
+"33rd",
+"34",
+"345",
+"3456",
+"34th",
+"35",
+"35th",
+"36",
+"36th",
+"37",
+"37th",
+"38",
+"38th",
+"39",
+"39th",
+"3a",
+"3b",
+"3c",
+"3d",
+"3e",
+"3f",
+"3g",
+"3h",
+"3i",
+"3j",
+"3k",
+"3l",
+"3m",
+"3n",
+"3o",
+"3p",
+"3q",
+"3r",
+"3rd",
+"3s",
+"3t",
+"3u",
+"3v",
+"3w",
+"3x",
+"3y",
+"3z",
+"4",
+"40",
+"400",
+"4000",
+"40th",
+"41",
+"41st",
+"42",
+"42nd",
+"43",
+"4321",
+"43rd",
+"44",
+"444",
+"4444",
+"44th",
+"45",
+"456",
+"4567",
+"45th",
+"46",
+"46th",
+"47",
+"47th",
+"48",
+"48th",
+"49",
+"49th",
+"4a",
+"4b",
+"4c",
+"4d",
+"4e",
+"4f",
+"4g",
+"4h",
+"4i",
+"4j",
+"4k",
+"4l",
+"4m",
+"4n",
+"4o",
+"4p",
+"4q",
+"4r",
+"4s",
+"4t",
+"4th",
+"4u",
+"4v",
+"4w",
+"4x",
+"4y",
+"4z",
+"5",
+"50",
+"500",
+"5000",
+"50th",
+"51",
+"51st",
+"52",
+"52nd",
+"53",
+"53rd",
+"54",
+"54th",
+"55",
+"555",
+"5555",
+"55th",
+"56",
+"567",
+"5678",
+"56th",
+"57",
+"57th",
+"58",
+"58th",
+"59",
+"59th",
+"5a",
+"5b",
+"5c",
+"5d",
+"5e",
+"5f",
+"5g",
+"5h",
+"5i",
+"5j",
+"5k",
+"5l",
+"5m",
+"5n",
+"5o",
+"5p",
+"5q",
+"5r",
+"5s",
+"5t",
+"5th",
+"5u",
+"5v",
+"5w",
+"5x",
+"5y",
+"5z",
+"6",
+"60",
+"600",
+"6000",
+"60th",
+"61",
+"61st",
+"62",
+"62nd",
+"63",
+"63rd",
+"64",
+"65",
+"65th",
+"66",
+"666",
+"6666",
+"66th",
+"67",
+"678",
+"6789",
+"67th",
+"68",
+"68th",
+"69",
+"69th",
+"6a",
+"6b",
+"6c",
+"6d",
+"6e",
+"6f",
+"6g",
+"6h",
+"6i",
+"6j",
+"6k",
+"6l",
+"6m",
+"6n",
+"6o",
+"6p",
+"6q",
+"6r",
+"6s",
+"6t",
+"6th",
+"6u",
+"6v",
+"6w",
+"6x",
+"6y",
+"6z",
+"7",
+"70",
+"700",
+"7000",
+"70th",
+"71",
+"71st",
+"72",
+"72nd",
+"73",
+"73rd",
+"74",
+"74th",
+"75",
+"75th",
+"76",
+"76th",
+"77",
+"777",
+"7777",
+"77th",
+"78",
+"789",
+"78th",
+"79",
+"79th",
+"7a",
+"7b",
+"7c",
+"7d",
+"7e",
+"7f",
+"7g",
+"7h",
+"7i",
+"7j",
+"7k",
+"7l",
+"7m",
+"7n",
+"7o",
+"7p",
+"7q",
+"7r",
+"7s",
+"7t",
+"7th",
+"7u",
+"7v",
+"7w",
+"7x",
+"7y",
+"7z",
+"8",
+"80",
+"800",
+"8000",
+"80th",
+"81",
+"81st",
+"82",
+"82nd",
+"83",
+"83rd",
+"84",
+"84th",
+"85",
+"85th",
+"86",
+"86th",
+"87",
+"87th",
+"88",
+"888",
+"8888",
+"88th",
+"89",
+"89th",
+"8a",
+"8b",
+"8c",
+"8d",
+"8e",
+"8f",
+"8g",
+"8h",
+"8i",
+"8j",
+"8k",
+"8l",
+"8m",
+"8n",
+"8o",
+"8p",
+"8q",
+"8r",
+"8s",
+"8t",
+"8th",
+"8u",
+"8v",
+"8w",
+"8x",
+"8y",
+"8z",
+"9",
+"90",
+"900",
+"9000",
+"90th",
+"91",
+"91st",
+"92",
+"92nd",
+"93",
+"93rd",
+"94",
+"94th",
+"95",
+"95th",
+"96",
+"96th",
+"97",
+"97th",
+"98",
+"9876",
+"98th",
+"99",
+"999",
+"9999",
+"99th",
+"9a",
+"9b",
+"9c",
+"9d",
+"9e",
+"9f",
+"9g",
+"9h",
+"9i",
+"9j",
+"9k",
+"9l",
+"9m",
+"9n",
+"9o",
+"9p",
+"9q",
+"9r",
+"9s",
+"9t",
+"9th",
+"9u",
+"9v",
+"9w",
+"9x",
+"9y",
+"9z",
+":",
+";",
+"=",
+"?",
+"??",
+"@" };
+
+const char *getDiceWd(unsigned int n) {
+	return Dicewds8k[n & 0X1fff];
+}
diff --git a/exceptions.h b/exceptions.h
new file mode 100644
index 0000000..773c574
--- /dev/null
+++ b/exceptions.h
@@ -0,0 +1,43 @@
+/*
+  exceptions.h - exception declarations for cexcept.h
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#ifndef EXCEPTIONS_H__
+#define EXCEPTIONS_H__
+
+#include "cexcept.h"
+
+/* The simplest approach is to have all exceptions defined in one place. */
+enum exception_code {
+	/* general exceptions */
+	no_exception = 0,	/* used to exit the Try block */
+	out_of_memory_exception,
+	system_call_failed_exception,
+	
+	/* library exceptions */
+	lib_crypto_exception
+};
+
+define_exception_type(enum exception_code);
+extern struct exception_context *the_exception_context;
+
+#endif	/* EXCEPTIONS_H__ */
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..cb3b0e0
--- /dev/null
+++ b/main.c
@@ -0,0 +1,222 @@
+/*
+  main.c - main program
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <math.h>
+#include "secure_memory.h"
+#include "secure_random.h"
+#include "pwgen.h"
+#include "exceptions.h"
+
+static char rcsid[] = "$Id: main.c 1 2005-11-13 20:23:40Z zvrba $";
+
+static struct exception_context exception_context;
+struct exception_context *the_exception_context = &exception_context;
+
+static void exit_cleanup(void)
+{
+	SRNG_destroy((struct SRNG_st*)G_secure_memory->random_state);
+	secure_memory_destroy();
+}
+
+static void usage(const char *argv0)
+{
+	fprintf(stderr, "USAGE: %s <-p[e] | -A[adhsy] | -r | -s[e]> N\n", argv0);
+	fprintf(stderr,
+	    "\nPASSPHRASE of N words from Diceware dictionary\n"
+		"  -p    generate passphrase\n"
+		"  -pe   generate enhanced (with symbols) passphrase\n"
+		"\nSKEY PASSWORD of N words from S/Key dictionary\n"
+		"  -s    generate passphrase\n"
+		"  -se   generate enhanced (with symbols) passphrase\n"
+		"\nASCII RANDOM of N elements (at least one option MUST be present)\n"
+		"  -A    Each letter adds the following random elements in output:\n"
+	    "    a    alphanumeric characters\n"
+		"    d    decimal digits\n"
+		"    h    hexadecimal digits\n"
+		"    s    special characters\n"
+		"    y    3-4 letter syllables\n"
+		"\nRAW RANDOM\n"
+		"  -r    output BASE64 encoded string of N random BITS\n"
+		"  -k    output koremutake encoding of N random BITS\n");
+	exit(1);
+}
+
+static unsigned int get_allowed_characters(const char *p)
+{
+	unsigned int characters = 0;
+
+	while(*p) {
+		switch(*p) {
+		case 'a':
+			characters |= chr_alphanumeric;
+			break;
+		case 'd':
+			characters |= chr_dec_digits;
+			break;
+		case 'h':
+			characters |= chr_hex_digits;
+			break;
+		case 's':
+			characters |= chr_special;
+			break;
+		case 'y':
+			characters |= chr_syllables;
+			break;
+		default:
+			return 0;
+		}
+		++p;
+	}
+		
+	/* filter out some combinations for correct entropy estimation */
+	if(characters & chr_alphanumeric)
+		characters &= ~(chr_dec_digits | chr_hex_digits);
+	if(characters & chr_hex_digits)
+		characters &= ~chr_dec_digits;
+	if((characters & chr_syllables)
+	&& (characters & (chr_alphanumeric | chr_dec_digits | chr_hex_digits))) {
+		characters &= ~(chr_alphanumeric | chr_dec_digits | chr_hex_digits);
+		characters |= chr_dec_digits;
+	}
+
+	return characters;
+}
+
+int main(int argc, char **argv)
+{
+	const char *getDiceWd(unsigned int);
+	const char *getSkeyWd(unsigned int);
+	unsigned int n;
+	unsigned int srng_state_len;
+	float entropy;
+	enum exception_code exception;
+	int retval = 0;
+
+	init_exception_context(&exception_context);
+
+	if(argc != 3)
+		usage(argv[0]);
+
+	n = atoi(argv[2]);
+	if(n < 1) {
+		fprintf(stderr, "ERROR: N must be an integer > 0\n");
+		usage(argv[0]);
+	}
+
+	srng_state_len = SRNG_init(NULL);
+	if(srng_state_len > MAX_RANDOM_STATE_SIZE) {
+		fprintf(stderr, 
+				"FATAL: too small MAX_RANDOM_STATE_SIZE "
+				"(must be at least %u)\n", srng_state_len);
+		return 1;
+	}
+
+	Try {
+		secure_memory_init();
+		SRNG_init((struct SRNG_st*)G_secure_memory->random_state);
+		
+		if(atexit(exit_cleanup) < 0) {
+			fprintf(stderr, "FATAL: can't register cleanup handlers: \n");
+			perror("atexit");
+			return 1;
+		}
+
+		if(!strcmp(argv[1], "-p"))
+			entropy = pwgen_diceware(
+					(struct SRNG_st*)G_secure_memory->random_state, n, 0,
+					getDiceWd, 8192, G_secure_memory->random_numbers,
+					G_secure_memory->passphrase);
+		else if(!strcmp(argv[1], "-pe"))
+			entropy = pwgen_diceware(
+					(struct SRNG_st*)G_secure_memory->random_state, n, 1,
+					getDiceWd, 8192, G_secure_memory->random_numbers,
+					G_secure_memory->passphrase);
+		else if(!strcmp(argv[1], "-r"))
+			entropy = pwgen_raw(
+					(struct SRNG_st*)G_secure_memory->random_state, n,
+					G_secure_memory->random_numbers,
+					G_secure_memory->passphrase);
+		else if(!strcmp(argv[1], "-k"))
+			entropy = pwgen_koremutake(
+					(struct SRNG_st*)G_secure_memory->random_state, n,
+					G_secure_memory->random_numbers,
+					G_secure_memory->passphrase);
+		else if(!strcmp(argv[1], "-s"))
+			entropy = pwgen_diceware(
+					(struct SRNG_st*)G_secure_memory->random_state, n, 0,
+					getSkeyWd, 2048, G_secure_memory->random_numbers,
+					G_secure_memory->passphrase);
+		else if(!strcmp(argv[1], "-se"))
+			entropy = pwgen_diceware(
+					(struct SRNG_st*)G_secure_memory->random_state, n, 1,
+					getSkeyWd, 2048, G_secure_memory->random_numbers,
+					G_secure_memory->passphrase);
+		else if(!strncmp(argv[1], "-A", 2)) {
+			unsigned int characters = get_allowed_characters(argv[1]+2);
+			
+			if(!characters)
+				usage(argv[0]);
+			entropy = pwgen_ascii(
+					(struct SRNG_st*)G_secure_memory->random_state, n,
+					characters, G_secure_memory->random_numbers,
+					G_secure_memory->passphrase);
+		} else {
+			usage(argv[0]);
+		}
+	} Catch(exception) {
+		switch(exception) {
+		case out_of_memory_exception:
+			fprintf(stderr, "FATAL: out of memory.\n");
+			retval = 1;
+			break;
+		case lib_crypto_exception:
+			fprintf(stderr, "FATAL: crypto library error.\n");
+			retval = 1;
+			break;
+		case system_call_failed_exception:
+			fprintf(stderr, "FATAL: system call failed.\n");
+			retval = 1;
+			break;
+		default:
+			fprintf(stderr, "FATAL: unhandled exception %u.\n", exception);
+			retval = 1;
+		}
+	}
+
+	if(!retval) {
+		printf("----------------\n");
+		/*
+		 * SECURITY NOTE
+		 * I have no idea how printf(3) is implemented and it just MIGHT copy
+		 * some sensitive data to its own stack.
+		 */
+		printf("%s ;ENTROPY=%.2f bits\n", G_secure_memory->passphrase,
+				entropy);
+		printf("----------------\n");
+	}
+	return retval;
+}
diff --git a/pwgen.c b/pwgen.c
new file mode 100644
index 0000000..64cc180
--- /dev/null
+++ b/pwgen.c
@@ -0,0 +1,313 @@
+/*
+  pwgen.c - actual password generation
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include "secure_random.h"
+#include "pwgen.h"
+#include "exceptions.h"
+
+static char rcsid[] = "$Id: pwgen.c 1 2005-11-13 20:23:40Z zvrba $";
+
+/**
+ * @file
+ * This is intended to be the UI-independent part of password generation.
+ *
+ * @note	On the programming style in this code: I'm aware that strcat()
+ * in a loop has quadratic performance, but here I just don't care and it
+ * makes my life easier.
+ */
+
+/******************************************************************************
+ * Tables and entropy constants.
+ *****************************************************************************/
+static const char *t_alphanumeric[36] = {
+	"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L",
+	"M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X",
+	"Y", "Z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"
+};
+
+static const char *t_dec_digits[36] = {
+	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+	NULL, NULL, NULL, NULL, NULL, NULL
+};
+
+static const char *t_hex_digits[36] = {
+	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F",
+	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F",
+	NULL, NULL, NULL, NULL
+};
+
+static const char *t_special[36] = {
+	"!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "-", "_",
+	"+", "=", "[", "]", "{", "}", ";", ":", "'", "\"", ",", ".",
+	"<", ">", "/", "?", "`", "~", "|", "\\", "--", "==", "..", "//"
+};
+
+static const char *t_syllables_lm[36] = {
+	"B", "C", "D", "F", "G", "H",
+	"J", "K", "L", "M", "N", "P",
+	"QU", "R", "S", "T", "V", "W",
+	"X", "Z", "CH", "CR", "FR", "ND",
+	"NG", "NK", "NT", "PH", "PR", "RD",
+	"SH", "SL", "SP", "ST", "TH", "TR"
+};
+
+static const char *t_syllables_r[6] = {
+	"A", "E", "I", "O", "U", "Y"
+};
+
+static const char *koremutake_syllables[128] = {
+	"BA", "BE", "BI", "BO", "BU", "BY", "DA", "DE",
+	"DI", "DO", "DU", "DY", "FA", "FE", "FI", "FO",
+	"FU", "FY", "GA", "GE", "GI", "GO", "GU", "GY",
+	"HA", "HE", "HI", "HO", "HU", "HY", "JA", "JE",
+	"JI", "JO", "JU", "JY", "KA", "KE", "KI", "KO",
+	"KU", "KY", "LA", "LE", "LI", "LO", "LU", "LY",
+	"MA", "ME", "MI", "MO", "MU", "MY", "NA", "NE",
+	"NI", "NO", "NU", "NY", "PA", "PE", "PI", "PO",
+	"PU", "PY", "RA", "RE", "RI", "RO", "RU", "RY",
+	"SA", "SE", "SI", "SO", "SU", "SY", "TA", "TE",
+	"TI", "TO", "TU", "TY", "VA", "VE", "VI", "VO",
+   	"VU", "VY", "BRA", "BRE", "BRI", "BRO", "BRU", "BRY",
+	"DRA", "DRE", "DRI", "DRO", "DRU", "DRY", "FRA", "FRE",
+	"FRI", "FRO", "FRU", "FRY", "GRA", "GRE", "GRI", "GRO",
+	"GRU", "GRY", "PRA", "PRE", "PRI", "PRO", "PRU", "PRY",
+	"STA", "STE", "STI", "STO", "STU", "STY", "TRA", "TRE"
+};
+
+#define	N_CHARACTER_CLASSES 5
+static struct {
+	enum character_classes	chr;		/* character class */
+	const char 				**dice12;	/* first two dice throws */
+	const char 				**dice3;	/* possibly 3rd dice or NULL */
+	float 					entropy;	/* entropy per element */
+} character_classes[N_CHARACTER_CLASSES] = {
+	{ chr_alphanumeric, t_alphanumeric, NULL, 5.17 },
+	{ chr_dec_digits, t_dec_digits, NULL, 3.32 },
+	{ chr_hex_digits, t_hex_digits, NULL, 4 },
+	{ chr_special, t_special, NULL, 5.17 },
+	{ chr_syllables, t_syllables_lm, t_syllables_r, 7.75 }
+};
+
+/* This is ONLY for passphrase enhancement. */
+static const char t_passphrase_enh[36] = {
+	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '-', '_',
+	'+', '=', '[', ']', '{', '}', ';', ':', '\'', '\'', ',', '.',
+	'<', '>', '/', '?', '`', '~', '|', '\\', 'U', 'O', 'E', 'Y'
+};
+
+/******************************************************************************
+ * Methods for password generation.
+ *****************************************************************************/
+
+float pwgen_diceware(
+		struct SRNG_st	*random_state,
+		unsigned int 	number_of_words,
+		int 			is_enhanced,
+		const char *	(*get_word)(unsigned int),
+		unsigned int 	dictionary_size,
+		unsigned int 	*random_buffer,
+		char 			*password_buffer)
+{
+	unsigned int i, word_length, output_index = 0;
+	const char *word;
+	float entropy = 0;
+
+	*password_buffer = 0;
+	for(i = 0; i < number_of_words; i++) {
+		SRNG_bytes(random_state, random_buffer, sizeof(*random_buffer));
+		word = get_word(*random_buffer);
+		word_length = strlen(word);
+
+		sprintf(password_buffer + output_index, "%s ", word);
+		entropy += log(dictionary_size) / log(2);
+		
+		if(is_enhanced) {
+			unsigned int char_pos, char_idx;
+
+			/* add a random symbol at random position into each word */
+			SRNG_bytes(random_state, random_buffer, 2*sizeof(*random_buffer));
+			char_pos = random_buffer[0] % word_length;
+			char_idx = random_buffer[1] % sizeof(t_passphrase_enh);
+			password_buffer[output_index+char_pos] =
+				t_passphrase_enh[char_idx];
+
+			/* 5.17 = log2(36) for each symbol plus the position randomness */
+			entropy += 5.17 + log(word_length) / log(2);
+		}
+		output_index += word_length+1;
+	}
+
+	return entropy;
+}
+
+//*********************************************************************
+//* Base64 - a simple base64 encoder and decoder.
+//*
+//*     Copyright (c) 1999, Bob Withers - bwit@pobox.com
+//*
+//* This code may be freely used for any purpose, either personal
+//* or commercial, provided the authors copyright notice remains
+//* intact.
+//*
+//* Converted to C in 2005 by Zeljko Vrba <zvrba@globalnet.hr>
+//*********************************************************************
+static void base64_encode(
+		const unsigned char *in,
+		unsigned int len,
+		char *out)
+{
+	static const char fillchar = '=';
+	static const char *cvt =
+		"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+		"abcdefghijklmnopqrstuvwxyz"
+		"0123456789+/";
+	unsigned int i;
+	unsigned char c;
+
+	/*
+	 * SECURITY NOTE: single byte from the in string gets copied to the
+	 * local stack in each iteration of the loop.
+	 */
+
+    for (i = 0; i < len; ++i) {
+		c = (in[i] >> 2) & 0x3f;
+		*out++ = cvt[c];
+		c = (in[i] << 4) & 0x3f;
+		if(++i < len)
+			c |= (in[i] >> 4) & 0x0f;
+		*out++ = cvt[c];
+		if(i < len) {
+			c = (in[i] << 2) & 0x3f;
+			if(++i < len)
+				c |= (in[i] >> 6) & 0x03;
+			*out++ = cvt[c];
+		} else {
+			++i;
+			*out++ = fillchar;
+		}
+
+		if(i < len) {
+			c = in[i] & 0x3f;
+			*out++ = cvt[c];
+		} else {
+			*out++ = fillchar;
+		}
+	}
+	*out++ = 0;
+}
+
+float pwgen_raw(
+		struct SRNG_st 	*random_state,
+		unsigned int 	number_of_bits,
+		unsigned int 	*random_buffer,
+		char 			*password_buffer)
+{
+	unsigned int number_of_bytes = ((number_of_bits-1)>>3)+1;
+	
+	SRNG_bytes(random_state, random_buffer, number_of_bytes);
+	base64_encode((unsigned char*)random_buffer, number_of_bytes,
+			password_buffer);
+	return number_of_bytes << 3;
+}
+
+/*
+ * This rounds the number of bits to the next higher multiple of 7 (since
+ * there are 128=2^7 syllables in the koremutake list).
+ */
+float pwgen_koremutake(
+		struct SRNG_st 	*random_state,
+		unsigned int 	number_of_bits,
+		unsigned int 	*random_buffer,
+		char 			*password_buffer)
+{
+	unsigned int i, number_of_bytes = ((number_of_bits-1)/7)+1;
+	unsigned char *u8buf = (unsigned char*)random_buffer;
+	
+	SRNG_bytes(random_state, random_buffer, number_of_bytes);
+	*password_buffer = 0;
+	for(i = 0; i < number_of_bytes; i++)
+		strcat(password_buffer, koremutake_syllables[u8buf[i] & 127]);
+	return number_of_bytes * 7;
+}
+
+static void select_class(
+		struct SRNG_st	*random_state,
+		unsigned int	allowed_classes,
+		unsigned int	*random_buffer)
+{
+	do {
+		SRNG_bytes(random_state, random_buffer, sizeof(*random_buffer));
+		*random_buffer %= N_CHARACTER_CLASSES;	/* not a LCG, so % is OK */
+	} while(!(allowed_classes & character_classes[*random_buffer].chr));
+}
+
+float pwgen_ascii(
+		struct SRNG_st	*random_state,
+		unsigned int 	number_of_components,
+		unsigned int 	allowed_classes,
+		unsigned int 	*random_buffer,
+		char 			*password_buffer)
+{
+	unsigned int i;
+	unsigned int *character_class = random_buffer;
+	unsigned int *dice12 = character_class + 1;
+	unsigned int *dice3  = character_class + 2;
+	float entropy = 0;
+
+	password_buffer[0] = 0;
+	for(i = 0; i < number_of_components; i++) {
+retry:
+		/* select character class and throw 3 dice */
+		select_class(random_state, allowed_classes, character_class);
+		SRNG_bytes(random_state, dice12, 2);
+		*dice12 %= 36;	/* 1st and 2nd dice */
+		*dice3  %= 6;	/* 3rd dice */
+
+		if(character_classes[*character_class].dice12[*dice12]) {
+			strcat(password_buffer,
+					character_classes[*character_class].dice12[*dice12]);
+			if(!character_classes[*character_class].dice3)
+				entropy += character_classes[*character_class].entropy;
+		} else {
+			goto retry;
+		}
+
+		if(character_classes[*character_class].dice3) {
+			if(character_classes[*character_class].dice3[*dice3]) {
+				strcat(password_buffer,
+						character_classes[*character_class].dice3[*dice3]);
+				entropy += character_classes[*character_class].entropy;
+			} else {
+				goto retry;
+			}
+		}
+	}
+	
+	return entropy;
+}
+
diff --git a/pwgen.h b/pwgen.h
new file mode 100644
index 0000000..26211fb
--- /dev/null
+++ b/pwgen.h
@@ -0,0 +1,130 @@
+/*
+  pwgen.h - interface to platform-independent password generation
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#ifndef PWGEN_H__
+#define PWGEN_H__
+
+/**
+ * @file
+ * This defines the interface to platform-independent secure password
+ * generation routines.
+ */
+
+/**
+ * Generate passphrase by the 'diceware' method: a number of words selected
+ * from a fixed list.
+ *
+ * @param	random_state	
+ * @param	number_of_words	
+ * @param	is_enhanced		If non-0, generates an enhanced passhprase.
+ * @param	get_word		Pointer to the 'get word' function.
+ * @param	dictionary_size	Number of words in the dictionary.
+ * @param	random_buffer	Buffer into which to generate random numbers.
+ * @param	password_buffer	Buffer to output passphrase to.
+ *
+ * @note	rndbuf and pwbuf are provided so that all sensitive output can
+ * 			be put into the secure memory, if available. There are no sizes
+ * 			specified, but generally rndbuf should have at least 64 bytes,
+ * 			and pwbuf at least 512 bytes.
+ *
+ * @return	Estimated password entropy.
+ */
+float pwgen_diceware(
+		struct SRNG_st	*random_state,
+		unsigned int 	number_of_words,
+		int 			is_enhanced,
+		const char *	(*get_word)(unsigned int),
+		unsigned int 	dictionary_size,
+		unsigned int 	*random_buffer,
+		char 			*password_buffer);
+
+/**
+ * Generate a raw random passphrase of n bits encoded into base64.
+ *
+ * @param	random_state	Random state.
+ * @param	number_of_bits	Number of bits.
+ * @param	random_buffer	Buffer into which to generate random numbers.
+ * @param	password_buffer	Buffer to output passphrase to.
+ *
+ * @todo	Use our own base64 encoder so we don't have to use mlockall()
+ * 			and OpenSSL.
+ *
+ * @return	Estimated password entropy.
+ */
+float pwgen_raw(
+		struct SRNG_st *random_state,
+		unsigned int number_of_bits,
+		unsigned int *random_buffer,
+		char *password_buffer);
+
+/**
+ * Generate a raw random passphrase of n bits encoded by koremutake encoding
+ * into a pronouncable word.
+ *
+ * @param	random_state	Random state.
+ * @param	number_of_bits	Number of bits.
+ * @param	random_buffer	Buffer into which to generate random numbers.
+ * @param	password_buffer	Buffer to output passphrase to.
+ *
+ * @todo	Use our own base64 encoder so we don't have to use mlockall()
+ * 			and OpenSSL.
+ *
+ * @return	Estimated password entropy.
+ */
+float pwgen_koremutake(
+		struct SRNG_st *random_state,
+		unsigned int number_of_bits,
+		unsigned int *random_buffer,
+		char *password_buffer);
+
+/** Allowable character classes for pwgen_ascii. */
+enum character_classes {
+	chr_alphanumeric = 1,
+	chr_dec_digits = 2,
+	chr_hex_digits = 4,
+	chr_special = 8,
+	chr_syllables = 16
+};
+
+/**
+ * Generate alphanumeric password generated from various 'classes'.
+ *
+ * @param	random_state			Random state.
+ * @param	number_of_components	Number of components.
+ * @param	character_classes		Bit-set of allowed character classes.
+ * @param	random_buffer			Buffer into which to generate random
+ * 									numbers.
+ * @param	password_buffer			Buffer to output passphrase to.
+ *
+ * @see		character_classes.
+ *
+ * @return	Estimated password entropy.
+ */
+float pwgen_ascii(
+		struct SRNG_st *random_state,
+		unsigned int number_of_components,
+		unsigned int character_classes,
+		unsigned int *random_buffer,
+		char *password_buffer);
+
+#endif	/* PWGEN_H__ */
diff --git a/secpwgen.1 b/secpwgen.1
new file mode 100644
index 0000000..5d6761f
--- /dev/null
+++ b/secpwgen.1
@@ -0,0 +1,293 @@
+.\" (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+.\" 
+.\" Permission is hereby granted, free of charge, to any person obtaining
+.\" a copy of this software and associated documentation files (the
+.\" "Software"), to deal in the Software without restriction, including
+.\" without limitation the rights to use, copy, modify, merge, publish,
+.\" distribute, sublicense, and/or sell copies of the Software, and to
+.\" permit persons to whom the Software is furnished to do so, subject to
+.\" the following conditions:
+.\" 
+.\" The above copyright notice and this permission notice shall be
+.\" included in all copies or substantial portions of the Software.
+.\" 
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+.\" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+.\" IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+.\" CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+.\" TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+.\" SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+.Dd April 4, 2005
+.Dt secpwgen 1
+.Os
+.Sh NAME
+.Nm secpwgen
+.Nd "secure password generator"
+.Sh SYNOPSIS
+.Nm
+.Fl p[e]
+.Ar n
+.Nm
+.Fl s[e]
+.Ar n
+.Nm
+.Fl A[adhsy]
+.Ar n
+.Nm
+.Fl r
+.Ar n
+.Nm
+.Fl k
+.Ar n
+.Sh DESCRIPTION
+The
+.Nm
+command is used to generate secure, high-entropy passwords by
+several methods. It aims to generate passwords that are strong and secure
+enough for cryptographic purposes (e.g. for protecting keys). The exact
+method is chosen by the options listed below:
+.Bl -tag -width ".Fl d"
+.It Fl p
+Diceware method with the diceware dictionary.
+.Ar n
+is the number of words in the password. If the method is specified as
+.Fl pe
+then an enhanced password is generated.
+.It Fl s
+Same as
+.Fl p
+and
+.Fl pe
+but with the S/Key dictionary.
+.It Fl A
+Generates an ASCII password of
+.Ar n
+parts. At least one letter after A is mandatory. Each letter incorporates
+additional set of components from which random elements are drawn. See the
+exact method description below.
+.It Fl r
+Generates a random password and outputs it as base-64 encoded string.
+.Ar n
+is the desired number of bits of entropy. It will be rounded up to the
+next higher multiple of 8.
+.It Fl k
+Same as
+.Fl r
+but uses the "koremutake" encoding instead of base 64 encoding. Koremutake
+is yet another way of producing pronouncible phrases from long bit strings.
+.It Ar n
+Specifies the size of the password. The exact meaning depends on the
+method and is described above in options.
+.El
+.Pp
+The program outputs the generated passphrase and a calculated entropy
+of the passphrase.
+.Sh METHOD DESCRIPTIONS
+The following subsections give detailed explanations of the password
+generation methods.
+.Ss DICEWARE METHOD
+This method selects
+.Ar n
+random words from the given dictionary. The diceware dictionary contains
+8192 words, and the S/Key dictionary contains 2048 words. Both dictionaries
+have been taken from the internet (see references).
+.Ss ENHANCED DICEWARE METHOD
+Extends the diceware method by chosing a random letter in each word
+and replacing that letter with one of 32 special symbols and 4 upper-case
+letters (all words in the dictionary are lower-case).
+.Ss ASCII METHOD
+Draws
+.Ar n
+random elements from randomly chosen allowed sets and concatenates
+them in a single string. The allowed sets are specified by the letters
+following the
+.Fl A
+flag and have these meanings:
+.Pp
+.Bl -tag -width "X" -compact
+.It a
+alphanumeric characters
+.It d
+decimal digits
+.It h
+hexadecimal digits
+.It s
+special characters
+.It y
+3- and 4-letter syllables
+.El
+.Pp
+Note that these sets are not all mutually exclusive. Such combinations
+will have the same effect as specifying a single "larger" set.
+.Ss RANDOM METHODS
+Rounds
+.Ar n
+up to the next higher multiple of 8 (7 in case of koremutake) bits (does
+nothing if it is already a multiple) and generates
+.Ar n/8
+(
+.Ar n/7
+)
+random bytes. The resulting passphrase is output as a base-64 or koremutake
+encoded string.
+.Pp
+In case of koremutake, for programming simplicity, each random byte is taken
+mod 128 and looked up in the syllable dictionary. Since the random number
+generator is assumed to be secure, i.e. generates uniformly distributed
+radnom numbers, there is no weakness by using the mod operation.
+.Sh SECURITY
+First of all, a
+.Sy warning:
+as recommended on the diceware site, NEVER actually put spaces between
+individual words of the generated passphrase. On many keyboards the space
+key has very distinctive sound which makes possible for the attacker to
+learn the number of words and possibly the number of letters in each word
+(in correct order). These facts divulge much information and make passphrase
+easier to guess.
+.Pp
+In the author's opinion the program is written very carefully so that the
+generated passphrase can't end up accidentaly on the swap or core file. The
+steps taken in securing the program:
+.Bl -bullet
+.It
+Dedicating a separate block of memory for all confidential data.
+.It
+Zeroing that block of memory upon program exit (by registering the atexit()
+function).
+.It
+Locking all programs' memory with mlockall(MCL_FUTURE), if possible (the
+program must be run with root privileges or installed setuid root to be
+able to do that).
+.Pp
+On some systems, locking memory with mlockall causes the program to fail
+(because some library routines try to allocate too much memory). In that
+case mlock is used with reduced security: the stack is not locked in memory.
+.It
+Disabling core-dumps in the event of crash.
+.It
+Cryptographically strong random number generator (using OpenSSL or cryptlib).
+The exact method for generation is described in its respective source file.
+.El
+.Pp
+The strength of the chain equals the strength of its weakest link. You should
+put as much trust in this program as you trust the implementation of any of
+the following used components: C library, the cryptographic toolkit used for
+random number generation, the kernel, and, ultimately, the system
+administrator (although not a SW component :), a malicious sysadmin can modify
+the kernel or system libraries to log somewhere all output of a program).
+.Pp
+You should build the program as statically linked, if at all possible. There
+are numerous ways in which dynamic linking can be used to subvert this
+programs' security. Unfortunately, there is no reliable nor portable way to
+discover at run-time if the program is statically or dynamically linked.
+.Ss OPENSSL NOTES
+This program does not take any steps to initialize the entropy pool. OpenSSL
+uses the system-provided /dev/[u]random as the source of randomness.
+OpenSSL should report an error on systems that do not provide the /dev/random
+device. If you are sure that your system does not support these
+devices (most notably, WIN32 systems) and the program does not report an
+error then
+.Sy do not use it
+if you want really secure and unguessable passwords. There are many real-life
+examples where the system security was compromised because of poor random
+number generators.
+.Ss CRYPTLIB NOTES
+For maximum security, it is recommended to use cryptlib if at all possible.
+Citing its manual, it is designed around a B3 kernel and tries very hard to
+protect and sanitize all sensitive data (including locking it in memory if
+possible). Also, there are no issues about initializing the entropy pool.
+.Sh EXAMPLES
+Generate an 4-word enhanced passphrase from the diceware dictionary:
+.Nm
+command:
+.Pp
+.Dl "secpwgen -pe 4"
+.Pp
+gives the following typical output when run without root privileges:
+.Pp
+.Bd -literal -unfilled -offset indent
+mlockall: Operation not permitted
+WARNING: using insecure memory.
+----------------
+ha'e ap.x ro|ue si+th  ;ENTROPY=81.32 bits
+----------------
+INFO: zeroing memory.
+.Ed
+.Sh DIAGNOSTICS
+Exit status is 0 on success, and 1 if the command
+encounters a fatal error. Informational messages are omitted from this
+listing. Their meaning can be deduced from the source.
+.Bl -diag
+.It "WARNING: using insecure memory."
+This message is not only pertained to memory; for example it can happen that
+the program can't turn off core file generation. The exact cause is seen
+in system error messages preceding the warning.
+.Pp
+If this message is printed, you must assume that the generated password can
+end up in plain text on the swap device, core file or other from where it
+could be retrieved by an adversary.
+.It "FATAL: out of memory."
+Cannot allocate enough memory.
+.It "FATAL: system call failed. There is no way..."
+The program, if installed as SUID root, drops its root privileges
+as soon as it obtains secure memory. This didn't succeed, and
+because of documented buffer overflows (see the
+.Sx BUGS
+section below) the program refuses to execute. Executing a SUID
+program with the potential of buffer overflows is an extreme
+security risk.
+.It "FATAL: too small MAX_RANDOM_STATE_SIZE..."
+The MAX_RANDOM_STATE_SIZE macro in secure_memory.h should be enlarged
+to at least the size displayed after the message and the program
+recompiled.
+.It "FATAL: unhandled exception"
+This is a real bug in the program. Report this to the author
+along with the exact command-line arguments, the compiler used,
+operating system, etc. 
+.It "ERROR: some garbage left to cryptlib."
+This is an indication of the bug in the program. Report this to the author
+along with other data described above. Nothing "bad" happened; everything
+was properly cleaned by cryptlib on exit. It is just an indication that
+some objects were not freed by the program before shutting down cryptlib.
+.El
+.Sh SEE ALSO
+.Xr pwgen 1 ,
+.Xr mlockall 2
+.Rs
+.%T "Diceware Passphrase Home Page"
+.%O http://www.diceware.com
+.Re
+.Rs
+.%T "Koremutake encoding"
+.%O http://shorl.com/koremutake.php
+.Re
+.Rs
+.%T "RFC1760: The S/KEY One-Time Password System"
+.Re
+.Rs
+.%T "RFC2289: A One-Time Password System"
+.Re
+.Rs
+.%A Peter Gutmann
+.%T cryptlib
+.%O http://www.cs.auckland.ac.nz/~pgut001/cryptlib/
+.Re
+.Rs
+.%T OpenSSL
+.%O http://www.openssl.org
+.Re
+.Sh AUTHORS
+The secpwgen program and this manual page were written by
+.An Zeljko Vrba Aq zvrba@globalnet.hr .
+.Sh BUGS
+The program
+.Sy will crash
+if
+.Ar n
+is too big. No checks are made for the internal buffer sizes. However, since
+this program is intended to be used by humans who must memorize their
+passphrases, this is not an issue. The program works correctly for "reasonable"
+sizes of
+.Ar n
+(e.g. less than 256).
diff --git a/secure_memory.h b/secure_memory.h
new file mode 100644
index 0000000..d48d6d6
--- /dev/null
+++ b/secure_memory.h
@@ -0,0 +1,57 @@
+/*
+  secure_memory.h - definitions of data structures residing in secure memory
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#ifndef SECURE_MEMORY_H__
+#define SECURE_MEMORY_H__
+
+/**
+ * @file
+ * This defines the contents of the secure memory.
+ */
+
+/** Maximum size of random state. */
+#define	MAX_RANDOM_STATE_SIZE	8192
+
+struct secure_memory {
+	unsigned char random_state[MAX_RANDOM_STATE_SIZE];
+	unsigned int  random_numbers[64];
+	char          passphrase[1];
+};
+
+extern struct secure_memory *G_secure_memory;
+extern unsigned int G_secure_memory_size;
+
+/**
+ * Set up a chunk of secure memory.
+ * 
+ * @return	0 if at least one operation failed, 1 otherwise. In either case
+ * the program execution can continue. There may be other side-effects such
+ * as printing warnings. If there was a fatal error, this function will
+ * terminate the program.
+ */
+int secure_memory_init(void);
+
+/** Destroy secure memory. Zeroes it before destruction. */
+void secure_memory_destroy(void);
+
+#endif	/* SECURE_MEMORY_H__ */
diff --git a/secure_memory_unix.c b/secure_memory_unix.c
new file mode 100644
index 0000000..1ccf855
--- /dev/null
+++ b/secure_memory_unix.c
@@ -0,0 +1,135 @@
+/*
+  secure_memory_unix.c - secure memory implementation for UNIX systems
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include "secure_random.h"
+#include "secure_memory.h"
+#include "exceptions.h"
+
+static char rcsid[] = "$Id: secure_memory_unix.c 1 2005-11-13 20:23:40Z zvrba $";
+
+#ifndef MAP_ANON
+#define MAP_ANON	MAP_ANONYMOUS
+#endif
+
+struct secure_memory *G_secure_memory;
+unsigned int G_secure_memory_size;
+static long G_pagesize;
+
+static int allocate_secure_memory(void)
+{
+	int retval = 1;
+
+	if((G_pagesize = sysconf(_SC_PAGESIZE)) < 0) {
+		perror("sysconf");
+		Throw(system_call_failed_exception);
+	}
+
+	G_secure_memory_size = 16*G_pagesize;
+	G_secure_memory = mmap(NULL, G_secure_memory_size, PROT_READ | PROT_WRITE,
+			MAP_ANON | MAP_PRIVATE, -1, 0);
+	if(G_secure_memory == MAP_FAILED) {
+		perror("mmap");
+		Throw(out_of_memory_exception);
+	}
+
+	/* This is to guarantee segfault on buffer overrun. */
+	if(mprotect((char*)G_secure_memory + 15*G_pagesize, G_pagesize,
+				PROT_NONE) < 0) {
+		perror("mprotect");
+		Throw(system_call_failed_exception);
+	}
+
+#ifdef DISABLE_MLOCKALL
+	/*
+	 * On some OSes (most notably some Linux 2.6 kernels versions), some
+	 * libraries try to allocate too much space and then crash (because
+	 * the allocation would exceed the maximum allowed number of locked
+	 * pages). Which results in a crash.
+	 *
+	 * However, this gives lower security since the stack pages are not
+	 * locked in memory.
+	 */
+	if(mlock(G_secure_memory, G_secure_memory_size) < 0) {
+		perror("mlock");
+		retval = 0;
+	}
+#else
+	if(mlockall(MCL_FUTURE) < 0) {
+		perror("mlockall");
+		retval = 0;
+	}
+#endif
+
+	return retval;
+}
+
+static void drop_privileges(void)
+{
+	if(seteuid(getuid()) < 0) {
+		perror("seteuid");
+		Throw(system_call_failed_exception);
+	}
+}
+
+static int disable_core_file(void)
+{
+	int retval = 1;
+	struct rlimit rlim = { 0, 0 };
+
+	if(setrlimit(RLIMIT_CORE, &rlim) < 0) {
+		perror("setrlimit");
+		retval = 0;
+	}
+
+	return retval;
+}
+
+int secure_memory_init(void)
+{
+	int success;
+
+	success  = allocate_secure_memory();
+	drop_privileges();
+	success &= disable_core_file();
+
+	if(!success) 
+		fprintf(stderr, "WARNING: using insecure memory.\n");
+
+	return success;
+}
+
+void secure_memory_destroy(void)
+{
+	printf("INFO: zeroing memory.\n");
+	memset(G_secure_memory, 0, G_secure_memory_size - G_pagesize);
+}
+
diff --git a/secure_random.h b/secure_random.h
new file mode 100644
index 0000000..d0eb42a
--- /dev/null
+++ b/secure_random.h
@@ -0,0 +1,69 @@
+/*
+  secure_random.h - interface for secure random number generator
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#ifndef SECURE_RANDOM_H__
+#define SECURE_RANDOM_H__
+
+/**
+	@file
+	This file defines the SRNG interface.
+*/
+
+/** Opaque structure used to hold secure random generator state. */
+struct SRNG_st;
+
+/**
+	Initialize the secure random number generator.
+	@param	st	The state variable which should be initialized. The behaviour
+				depends whether this is NULL or not.
+	@return	The size of the initialized state.
+
+	An exception is thrown on error.
+
+	@note	The interface is designed such that it is possible to provide a
+			secure (e.g. memory-locked) buffer for the state. If \e st is
+			NULL, the function does nothing, but still returns the size that
+			needs to be reserved for the state.
+*/
+unsigned int SRNG_init(struct SRNG_st *st);
+
+/**
+	Obtain \e n bytes of randomness from the generator.
+
+	@param	st		Pointer to generator state.
+	@param	buf		Buffer to store random bytes.
+	@param	n		Number of random bytes to retrieve.
+
+	An exception is thrown on error.
+*/
+void SRNG_bytes(
+	struct SRNG_st *st,
+	void *buf,
+	unsigned int n);
+
+/**
+ * Destroy the RNG state. \e st is pointer returned by SRNG_init().
+ */
+void SRNG_destroy(struct SRNG_st *st);
+
+#endif	/* SECURE_RANDOM_H__ */
diff --git a/secure_random_cryptlib.c b/secure_random_cryptlib.c
new file mode 100644
index 0000000..ba0fbe8
--- /dev/null
+++ b/secure_random_cryptlib.c
@@ -0,0 +1,84 @@
+/*
+  secure_random_openssl.c - secure random number generator using OpenSSL
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <cryptlib.h>
+#include "exceptions.h"
+
+static char rcsid[] = "$Id: secure_random_cryptlib.c 1 2005-11-13 20:23:40Z zvrba $";
+
+/**
+	@file
+	Cryptlib random number generator.
+*/
+
+struct SRNG_st {
+	CRYPT_CONTEXT ctx;
+	char rnd[64];
+};
+
+#define	CALL_CL(func, ...) do { \
+	int ret__ = func(__VA_ARGS__); \
+	if(ret__ != CRYPT_OK) { \
+		fprintf(stderr, "cryptlib error: %d\n", ret__); \
+		Throw(lib_crypto_exception); \
+	} \
+} while(0)
+
+unsigned int SRNG_init(struct SRNG_st *st)
+{
+	if(!st)
+		goto end;
+
+	CALL_CL(cryptInit);
+	CALL_CL(cryptAddRandom, NULL, CRYPT_RANDOM_SLOWPOLL);
+	CALL_CL(cryptCreateContext, &st->ctx, CRYPT_UNUSED, CRYPT_ALGO_RC4);
+	CALL_CL(cryptGenerateKey, st->ctx);
+
+end:
+	return sizeof(struct SRNG_st);
+}
+
+void SRNG_bytes(
+	struct SRNG_st *st,
+	void *buf,
+	unsigned int n)
+{
+	assert(n < sizeof(st->rnd));
+	CALL_CL(cryptEncrypt, st->ctx, st->rnd, sizeof(st->rnd));
+	memcpy(buf, st->rnd, n);
+}
+
+void SRNG_destroy(struct SRNG_st *st)
+{
+	printf("INFO: destroying random number generator.\n");
+	CALL_CL(cryptDestroyContext, st->ctx);
+	if(cryptEnd() != CRYPT_OK) {
+		fprintf(stderr, "ERROR: some garbage left to cryptlib.");
+	}
+	memset(st, 0, sizeof(*st));
+}
+
diff --git a/secure_random_openssl.c b/secure_random_openssl.c
new file mode 100644
index 0000000..fe29165
--- /dev/null
+++ b/secure_random_openssl.c
@@ -0,0 +1,108 @@
+/*
+  secure_random_openssl.c - secure random number generator using OpenSSL
+  (c) 2004-2005 Zeljko Vrba <zvrba@globalnet.hr>
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#include <stdlib.h>
+#include <string.h>
+#include <openssl/err.h>
+#include <openssl/rand.h>
+#include <openssl/blowfish.h>
+#include "exceptions.h"
+
+static char rcsid[] = "$Id: secure_random_openssl.c 1 2005-11-13 20:23:40Z zvrba $";
+
+/**
+	@file
+	This implementation uses the Blowfish cipher and low-level interfaces
+	usable both in SSLEay and OpenSSL (the latter is interesting in porting
+	to e.g. PalmOS).
+	
+	The generator gathers a small amount of true randomness from the system and
+	uses it to initialize the blowfish key and the randomness buffer. Further
+	random bytes are obtained by encrypting the previous contents of the
+	random buffer.
+*/
+
+/* Blowfish parameters. */
+#define	KEY_SIZE	16	/* 128-bit key size */
+#define BLOCK_SIZE	8	/* 64-bit block size */
+
+struct SRNG_st {
+	BF_KEY key;
+	unsigned char rnd[2*BLOCK_SIZE];
+	unsigned int idx;
+	unsigned char keydata[KEY_SIZE];
+};
+
+unsigned int SRNG_init(struct SRNG_st *st)
+{
+	if(!st)
+		goto end;
+
+	if(!RAND_bytes(st->keydata, sizeof(st->keydata))
+	|| !RAND_bytes(st->rnd, sizeof(st->rnd))) {
+		ERR_print_errors_fp(stderr);
+		Throw(lib_crypto_exception);
+	}
+
+	BF_set_key(&st->key, sizeof(st->keydata), st->keydata);
+	st->idx = 0;
+
+end:
+	return sizeof(struct SRNG_st);
+}
+
+void SRNG_bytes(
+	struct SRNG_st *st,
+	void *buf,
+	unsigned int n)
+{
+	unsigned char *out = buf, *src, *dst;
+
+	while(1) {
+		/*
+		 * this swaps src and dst to point to differenct halves of st->rnd on
+		 * each iteration. st->idx is either 0 or BLOCK_SIZE. it is initialized
+		 * to 0 in SRNG_init.
+		 */
+		src = st->rnd + st->idx;
+		dst = st->rnd + (BLOCK_SIZE - st->idx);
+		st->idx = BLOCK_SIZE - st->idx;
+
+		BF_ecb_encrypt(src, dst, &st->key, BF_ENCRYPT);
+
+		if(n < BLOCK_SIZE) {
+			memcpy(out, dst, n);
+			break;
+		}
+
+		memcpy(out, dst, BLOCK_SIZE);
+		n -= BLOCK_SIZE; out += BLOCK_SIZE;
+	}
+}
+
+void SRNG_destroy(struct SRNG_st *st)
+{
+	printf("INFO: destroying random number generator.\n");
+	memset(st, 0, sizeof(*st));
+}
+
diff --git a/skeylist.c b/skeylist.c
new file mode 100644
index 0000000..4e36a51
--- /dev/null
+++ b/skeylist.c
@@ -0,0 +1,263 @@
+static const char *skeylist[2048] =
+{        "a",     "abe",   "ace",   "act",   "ad",    "ada",   "add",
+"ago",   "aid",   "aim",   "air",   "all",   "alp",   "am",    "amy",
+"an",    "ana",   "and",   "ann",   "ant",   "any",   "ape",   "aps",
+"apt",   "arc",   "are",   "ark",   "arm",   "art",   "as",    "ash",
+"ask",   "at",    "ate",   "aug",   "auk",   "ave",   "awe",   "awk",
+"awl",   "awn",   "ax",    "aye",   "bad",   "bag",   "bah",   "bam",
+"ban",   "bar",   "bat",   "bay",   "be",    "bed",   "bee",   "beg",
+"ben",   "bet",   "bey",   "bib",   "bid",   "big",   "bin",   "bit",
+"bob",   "bog",   "bon",   "boo",   "bop",   "bow",   "boy",   "bub",
+"bud",   "bug",   "bum",   "bun",   "bus",   "but",   "buy",   "by",
+"bye",   "cab",   "cal",   "cam",   "can",   "cap",   "car",   "cat",
+"caw",   "cod",   "cog",   "col",   "con",   "coo",   "cop",   "cot",
+"cow",   "coy",   "cry",   "cub",   "cue",   "cup",   "cur",   "cut",
+"dab",   "dad",   "dam",   "dan",   "dar",   "day",   "dee",   "del",
+"den",   "des",   "dew",   "did",   "die",   "dig",   "din",   "dip",
+"do",    "doe",   "dog",   "don",   "dot",   "dow",   "dry",   "dub",
+"dud",   "due",   "dug",   "dun",   "ear",   "eat",   "ed",    "eel",
+"egg",   "ego",   "eli",   "elk",   "elm",   "ely",   "em",    "end",
+"est",   "etc",   "eva",   "eve",   "ewe",   "eye",   "fad",   "fan",
+"far",   "fat",   "fay",   "fed",   "fee",   "few",   "fib",   "fig",
+"fin",   "fir",   "fit",   "flo",   "fly",   "foe",   "fog",   "for",
+"fry",   "fum",   "fun",   "fur",   "gab",   "gad",   "gag",   "gal",
+"gam",   "gap",   "gas",   "gay",   "gee",   "gel",   "gem",   "get",
+"gig",   "gil",   "gin",   "go",    "got",   "gum",   "gun",   "gus",
+"gut",   "guy",   "gym",   "gyp",   "ha",    "had",   "hal",   "ham",
+"han",   "hap",   "has",   "hat",   "haw",   "hay",   "he",    "hem",
+"hen",   "her",   "hew",   "hey",   "hi",    "hid",   "him",   "hip",
+"his",   "hit",   "ho",    "hob",   "hoc",   "hoe",   "hog",   "hop",
+"hot",   "how",   "hub",   "hue",   "hug",   "huh",   "hum",   "hut",
+"i",     "icy",   "ida",   "if",    "ike",   "ill",   "ink",   "inn",
+"io",    "ion",   "iq",    "ira",   "ire",   "irk",   "is",    "it",
+"its",   "ivy",   "jab",   "jag",   "jam",   "jan",   "jar",   "jaw",
+"jay",   "jet",   "jig",   "jim",   "jo",    "job",   "joe",   "jog",
+"jot",   "joy",   "jug",   "jut",   "kay",   "keg",   "ken",   "key",
+"kid",   "kim",   "kin",   "kit",   "la",    "lab",   "lac",   "lad",
+"lag",   "lam",   "lap",   "law",   "lay",   "lea",   "led",   "lee",
+"leg",   "len",   "leo",   "let",   "lew",   "lid",   "lie",   "lin",
+"lip",   "lit",   "lo",    "lob",   "log",   "lop",   "los",   "lot",
+"lou",   "low",   "loy",   "lug",   "lye",   "ma",    "mac",   "mad",
+"mae",   "man",   "mao",   "map",   "mat",   "maw",   "may",   "me",
+"meg",   "mel",   "men",   "met",   "mew",   "mid",   "min",   "mit",
+"mob",   "mod",   "moe",   "moo",   "mop",   "mos",   "mot",   "mow",
+"mud",   "mug",   "mum",   "my",    "nab",   "nag",   "nan",   "nap",
+"nat",   "nay",   "ne",    "ned",   "nee",   "net",   "new",   "nib",
+"nil",   "nip",   "nit",   "no",    "nob",   "nod",   "non",   "nor",
+"not",   "nov",   "now",   "nu",    "nun",   "nut",   "o",     "oaf",
+"oak",   "oar",   "oat",   "odd",   "ode",   "of",    "off",   "oft",
+"oh",    "oil",   "ok",    "old",   "on",    "one",   "or",    "orb",
+"ore",   "orr",   "os",    "ott",   "our",   "out",   "ova",   "ow",
+"owe",   "owl",   "own",   "ox",    "pa",    "pad",   "pal",   "pam",
+"pan",   "pap",   "par",   "pat",   "paw",   "pay",   "pea",   "peg",
+"pen",   "pep",   "per",   "pet",   "pew",   "phi",   "pi",    "pie",
+"pin",   "pit",   "ply",   "po",    "pod",   "poe",   "pop",   "pot",
+"pow",   "pro",   "pry",   "pub",   "pug",   "pun",   "pup",   "put",
+"quo",   "rag",   "ram",   "ran",   "rap",   "rat",   "raw",   "ray",
+"reb",   "red",   "rep",   "ret",   "rib",   "rid",   "rig",   "rim",
+"rio",   "rip",   "rob",   "rod",   "roe",   "ron",   "rot",   "row",
+"roy",   "rub",   "rue",   "rug",   "rum",   "run",   "rye",   "sac",
+"sad",   "sag",   "sal",   "sam",   "san",   "sap",   "sat",   "saw",
+"say",   "sea",   "sec",   "see",   "sen",   "set",   "sew",   "she",
+"shy",   "sin",   "sip",   "sir",   "sis",   "sit",   "ski",   "sky",
+"sly",   "so",    "sob",   "sod",   "son",   "sop",   "sow",   "soy",
+"spa",   "spy",   "sub",   "sud",   "sue",   "sum",   "sun",   "sup",
+"tab",   "tad",   "tag",   "tan",   "tap",   "tar",   "tea",   "ted",
+"tee",   "ten",   "the",   "thy",   "tic",   "tie",   "tim",   "tin",
+"tip",   "to",    "toe",   "tog",   "tom",   "ton",   "too",   "top",
+"tow",   "toy",   "try",   "tub",   "tug",   "tum",   "tun",   "two",
+"un",    "up",    "us",    "use",   "van",   "vat",   "vet",   "vie",
+"wad",   "wag",   "war",   "was",   "way",   "we",    "web",   "wed",
+"wee",   "wet",   "who",   "why",   "win",   "wit",   "wok",   "won",
+"woo",   "wow",   "wry",   "wu",    "yam",   "yap",   "yaw",   "ye",
+"yea",   "yes",   "yet",   "you",   "abed",  "abel",  "abet",  "able",
+"abut",  "ache",  "acid",  "acme",  "acre",  "acta",  "acts",  "adam",
+"adds",  "aden",  "afar",  "afro",  "agee",  "ahem",  "ahoy",  "aida",
+"aide",  "aids",  "airy",  "ajar",  "akin",  "alan",  "alec",  "alga",
+"alia",  "ally",  "alma",  "aloe",  "also",  "alto",  "alum",  "alva",
+"amen",  "ames",  "amid",  "ammo",  "amok",  "amos",  "amra",  "andy",
+"anew",  "anna",  "anne",  "ante",  "anti",  "aqua",  "arab",  "arch",
+"area",  "argo",  "arid",  "army",  "arts",  "arty",  "asia",  "asks",
+"atom",  "aunt",  "aura",  "auto",  "aver",  "avid",  "avis",  "avon",
+"avow",  "away",  "awry",  "babe",  "baby",  "bach",  "back",  "bade",
+"bail",  "bait",  "bake",  "bald",  "bale",  "bali",  "balk",  "ball",
+"balm",  "band",  "bane",  "bang",  "bank",  "barb",  "bard",  "bare",
+"bark",  "barn",  "barr",  "base",  "bash",  "bask",  "bass",  "bate",
+"bath",  "bawd",  "bawl",  "bead",  "beak",  "beam",  "bean",  "bear",
+"beat",  "beau",  "beck",  "beef",  "been",  "beer",  "beet",  "bela",
+"bell",  "belt",  "bend",  "bent",  "berg",  "bern",  "bert",  "bess",
+"best",  "beta",  "beth",  "bhoy",  "bias",  "bide",  "bien",  "bile",
+"bilk",  "bill",  "bind",  "bing",  "bird",  "bite",  "bits",  "blab",
+"blat",  "bled",  "blew",  "blob",  "bloc",  "blot",  "blow",  "blue",
+"blum",  "blur",  "boar",  "boat",  "boca",  "bock",  "bode",  "body",
+"bogy",  "bohr",  "boil",  "bold",  "bolo",  "bolt",  "bomb",  "bona",
+"bond",  "bone",  "bong",  "bonn",  "bony",  "book",  "boom",  "boon",
+"boot",  "bore",  "borg",  "born",  "bose",  "boss",  "both",  "bout",
+"bowl",  "boyd",  "brad",  "brae",  "brag",  "bran",  "bray",  "bred",
+"brew",  "brig",  "brim",  "brow",  "buck",  "budd",  "buff",  "bulb",
+"bulk",  "bull",  "bunk",  "bunt",  "buoy",  "burg",  "burl",  "burn",
+"burr",  "burt",  "bury",  "bush",  "buss",  "bust",  "busy",  "byte",
+"cady",  "cafe",  "cage",  "cain",  "cake",  "calf",  "call",  "calm",
+"came",  "cane",  "cant",  "card",  "care",  "carl",  "carr",  "cart",
+"case",  "cash",  "cask",  "cast",  "cave",  "ceil",  "cell",  "cent",
+"cern",  "chad",  "char",  "chat",  "chaw",  "chef",  "chen",  "chew",
+"chic",  "chin",  "chou",  "chow",  "chub",  "chug",  "chum",  "cite",
+"city",  "clad",  "clam",  "clan",  "claw",  "clay",  "clod",  "clog",
+"clot",  "club",  "clue",  "coal",  "coat",  "coca",  "cock",  "coco",
+"coda",  "code",  "cody",  "coed",  "coil",  "coin",  "coke",  "cola",
+"cold",  "colt",  "coma",  "comb",  "come",  "cook",  "cool",  "coon",
+"coot",  "cord",  "core",  "cork",  "corn",  "cost",  "cove",  "cowl",
+"crab",  "crag",  "cram",  "cray",  "crew",  "crib",  "crow",  "crud",
+"cuba",  "cube",  "cuff",  "cull",  "cult",  "cuny",  "curb",  "curd",
+"cure",  "curl",  "curt",  "cuts",  "dade",  "dale",  "dame",  "dana",
+"dane",  "dang",  "dank",  "dare",  "dark",  "darn",  "dart",  "dash",
+"data",  "date",  "dave",  "davy",  "dawn",  "days",  "dead",  "deaf",
+"deal",  "dean",  "dear",  "debt",  "deck",  "deed",  "deem",  "deer",
+"deft",  "defy",  "dell",  "dent",  "deny",  "desk",  "dial",  "dice",
+"died",  "diet",  "dime",  "dine",  "ding",  "dint",  "dire",  "dirt",
+"disc",  "dish",  "disk",  "dive",  "dock",  "does",  "dole",  "doll",
+"dolt",  "dome",  "done",  "doom",  "door",  "dora",  "dose",  "dote",
+"doug",  "dour",  "dove",  "down",  "drab",  "drag",  "dram",  "draw",
+"drew",  "drub",  "drug",  "drum",  "dual",  "duck",  "duct",  "duel",
+"duet",  "duke",  "dull",  "dumb",  "dune",  "dunk",  "dusk",  "dust",
+"duty",  "each",  "earl",  "earn",  "ease",  "east",  "easy",  "eben",
+"echo",  "eddy",  "eden",  "edge",  "edgy",  "edit",  "edna",  "egan",
+"elan",  "elba",  "ella",  "else",  "emil",  "emit",  "emma",  "ends",
+"eric",  "eros",  "even",  "ever",  "evil",  "eyed",  "face",  "fact",
+"fade",  "fail",  "fain",  "fair",  "fake",  "fall",  "fame",  "fang",
+"farm",  "fast",  "fate",  "fawn",  "fear",  "feat",  "feed",  "feel",
+"feet",  "fell",  "felt",  "fend",  "fern",  "fest",  "feud",  "fief",
+"figs",  "file",  "fill",  "film",  "find",  "fine",  "fink",  "fire",
+"firm",  "fish",  "fisk",  "fist",  "fits",  "five",  "flag",  "flak",
+"flam",  "flat",  "flaw",  "flea",  "fled",  "flew",  "flit",  "floc",
+"flog",  "flow",  "flub",  "flue",  "foal",  "foam",  "fogy",  "foil",
+"fold",  "folk",  "fond",  "font",  "food",  "fool",  "foot",  "ford",
+"fore",  "fork",  "form",  "fort",  "foss",  "foul",  "four",  "fowl",
+"frau",  "fray",  "fred",  "free",  "fret",  "frey",  "frog",  "from",
+"fuel",  "full",  "fume",  "fund",  "funk",  "fury",  "fuse",  "fuss",
+"gaff",  "gage",  "gail",  "gain",  "gait",  "gala",  "gale",  "gall",
+"galt",  "game",  "gang",  "garb",  "gary",  "gash",  "gate",  "gaul",
+"gaur",  "gave",  "gawk",  "gear",  "geld",  "gene",  "gent",  "germ",
+"gets",  "gibe",  "gift",  "gild",  "gill",  "gilt",  "gina",  "gird",
+"girl",  "gist",  "give",  "glad",  "glee",  "glen",  "glib",  "glob",
+"glom",  "glow",  "glue",  "glum",  "glut",  "goad",  "goal",  "goat",
+"goer",  "goes",  "gold",  "golf",  "gone",  "gong",  "good",  "goof",
+"gore",  "gory",  "gosh",  "gout",  "gown",  "grab",  "grad",  "gray",
+"greg",  "grew",  "grey",  "grid",  "grim",  "grin",  "grit",  "grow",
+"grub",  "gulf",  "gull",  "gunk",  "guru",  "gush",  "gust",  "gwen",
+"gwyn",  "haag",  "haas",  "hack",  "hail",  "hair",  "hale",  "half",
+"hall",  "halo",  "halt",  "hand",  "hang",  "hank",  "hans",  "hard",
+"hark",  "harm",  "hart",  "hash",  "hast",  "hate",  "hath",  "haul",
+"have",  "hawk",  "hays",  "head",  "heal",  "hear",  "heat",  "hebe",
+"heck",  "heed",  "heel",  "heft",  "held",  "hell",  "helm",  "herb",
+"herd",  "here",  "hero",  "hers",  "hess",  "hewn",  "hick",  "hide",
+"high",  "hike",  "hill",  "hilt",  "hind",  "hint",  "hire",  "hiss",
+"hive",  "hobo",  "hock",  "hoff",  "hold",  "hole",  "holm",  "holt",
+"home",  "hone",  "honk",  "hood",  "hoof",  "hook",  "hoot",  "horn",
+"hose",  "host",  "hour",  "hove",  "howe",  "howl",  "hoyt",  "huck",
+"hued",  "huff",  "huge",  "hugh",  "hugo",  "hulk",  "hull",  "hunk",
+"hunt",  "hurd",  "hurl",  "hurt",  "hush",  "hyde",  "hymn",  "ibis",
+"icon",  "idea",  "idle",  "iffy",  "inca",  "inch",  "into",  "ions",
+"iota",  "iowa",  "iris",  "irma",  "iron",  "isle",  "itch",  "item",
+"ivan",  "jack",  "jade",  "jail",  "jake",  "jane",  "java",  "jean",
+"jeff",  "jerk",  "jess",  "jest",  "jibe",  "jill",  "jilt",  "jive",
+"joan",  "jobs",  "jock",  "joel",  "joey",  "john",  "join",  "joke",
+"jolt",  "jove",  "judd",  "jude",  "judo",  "judy",  "juju",  "juke",
+"july",  "june",  "junk",  "juno",  "jury",  "just",  "jute",  "kahn",
+"kale",  "kane",  "kant",  "karl",  "kate",  "keel",  "keen",  "keno",
+"kent",  "kern",  "kerr",  "keys",  "kick",  "kill",  "kind",  "king",
+"kirk",  "kiss",  "kite",  "klan",  "knee",  "knew",  "knit",  "knob",
+"knot",  "know",  "koch",  "kong",  "kudo",  "kurd",  "kurt",  "kyle",
+"lace",  "lack",  "lacy",  "lady",  "laid",  "lain",  "lair",  "lake",
+"lamb",  "lame",  "land",  "lane",  "lang",  "lard",  "lark",  "lass",
+"last",  "late",  "laud",  "lava",  "lawn",  "laws",  "lays",  "lead",
+"leaf",  "leak",  "lean",  "lear",  "leek",  "leer",  "left",  "lend",
+"lens",  "lent",  "leon",  "lesk",  "less",  "lest",  "lets",  "liar",
+"lice",  "lick",  "lied",  "lien",  "lies",  "lieu",  "life",  "lift",
+"like",  "lila",  "lilt",  "lily",  "lima",  "limb",  "lime",  "lind",
+"line",  "link",  "lint",  "lion",  "lisa",  "list",  "live",  "load",
+"loaf",  "loam",  "loan",  "lock",  "loft",  "loge",  "lois",  "lola",
+"lone",  "long",  "look",  "loon",  "loot",  "lord",  "lore",  "lose",
+"loss",  "lost",  "loud",  "love",  "lowe",  "luck",  "lucy",  "luge",
+"luke",  "lulu",  "lund",  "lung",  "lura",  "lure",  "lurk",  "lush",
+"lust",  "lyle",  "lynn",  "lyon",  "lyra",  "mace",  "made",  "magi",
+"maid",  "mail",  "main",  "make",  "male",  "mali",  "mall",  "malt",
+"mana",  "mann",  "many",  "marc",  "mare",  "mark",  "mars",  "mart",
+"mary",  "mash",  "mask",  "mass",  "mast",  "mate",  "math",  "maul",
+"mayo",  "mead",  "meal",  "mean",  "meat",  "meek",  "meet",  "meld",
+"melt",  "memo",  "mend",  "menu",  "mert",  "mesh",  "mess",  "mice",
+"mike",  "mild",  "mile",  "milk",  "mill",  "milt",  "mimi",  "mind",
+"mine",  "mini",  "mink",  "mint",  "mire",  "miss",  "mist",  "mite",
+"mitt",  "moan",  "moat",  "mock",  "mode",  "mold",  "mole",  "moll",
+"molt",  "mona",  "monk",  "mont",  "mood",  "moon",  "moor",  "moot",
+"more",  "morn",  "mort",  "moss",  "most",  "moth",  "move",  "much",
+"muck",  "mudd",  "muff",  "mule",  "mull",  "murk",  "mush",  "must",
+"mute",  "mutt",  "myra",  "myth",  "nagy",  "nail",  "nair",  "name",
+"nary",  "nash",  "nave",  "navy",  "neal",  "near",  "neat",  "neck",
+"need",  "neil",  "nell",  "neon",  "nero",  "ness",  "nest",  "news",
+"newt",  "nibs",  "nice",  "nick",  "nile",  "nina",  "nine",  "noah",
+"node",  "noel",  "noll",  "none",  "nook",  "noon",  "norm",  "nose",
+"note",  "noun",  "nova",  "nude",  "null",  "numb",  "oath",  "obey",
+"oboe",  "odin",  "ohio",  "oily",  "oint",  "okay",  "olaf",  "oldy",
+"olga",  "olin",  "oman",  "omen",  "omit",  "once",  "ones",  "only",
+"onto",  "onus",  "oral",  "orgy",  "oslo",  "otis",  "otto",  "ouch",
+"oust",  "outs",  "oval",  "oven",  "over",  "owly",  "owns",  "quad",
+"quit",  "quod",  "race",  "rack",  "racy",  "raft",  "rage",  "raid",
+"rail",  "rain",  "rake",  "rank",  "rant",  "rare",  "rash",  "rate",
+"rave",  "rays",  "read",  "real",  "ream",  "rear",  "reck",  "reed",
+"reef",  "reek",  "reel",  "reid",  "rein",  "rena",  "rend",  "rent",
+"rest",  "rice",  "rich",  "rick",  "ride",  "rift",  "rill",  "rime",
+"ring",  "rink",  "rise",  "risk",  "rite",  "road",  "roam",  "roar",
+"robe",  "rock",  "rode",  "roil",  "roll",  "rome",  "rood",  "roof",
+"rook",  "room",  "root",  "rosa",  "rose",  "ross",  "rosy",  "roth",
+"rout",  "rove",  "rowe",  "rows",  "rube",  "ruby",  "rude",  "rudy",
+"ruin",  "rule",  "rung",  "runs",  "runt",  "ruse",  "rush",  "rusk",
+"russ",  "rust",  "ruth",  "sack",  "safe",  "sage",  "said",  "sail",
+"sale",  "salk",  "salt",  "same",  "sand",  "sane",  "sang",  "sank",
+"sara",  "saul",  "save",  "says",  "scan",  "scar",  "scat",  "scot",
+"seal",  "seam",  "sear",  "seat",  "seed",  "seek",  "seem",  "seen",
+"sees",  "self",  "sell",  "send",  "sent",  "sets",  "sewn",  "shag",
+"sham",  "shaw",  "shay",  "shed",  "shim",  "shin",  "shod",  "shoe",
+"shot",  "show",  "shun",  "shut",  "sick",  "side",  "sift",  "sigh",
+"sign",  "silk",  "sill",  "silo",  "silt",  "sine",  "sing",  "sink",
+"sire",  "site",  "sits",  "situ",  "skat",  "skew",  "skid",  "skim",
+"skin",  "skit",  "slab",  "slam",  "slat",  "slay",  "sled",  "slew",
+"slid",  "slim",  "slit",  "slob",  "slog",  "slot",  "slow",  "slug",
+"slum",  "slur",  "smog",  "smug",  "snag",  "snob",  "snow",  "snub",
+"snug",  "soak",  "soar",  "sock",  "soda",  "sofa",  "soft",  "soil",
+"sold",  "some",  "song",  "soon",  "soot",  "sore",  "sort",  "soul",
+"sour",  "sown",  "stab",  "stag",  "stan",  "star",  "stay",  "stem",
+"stew",  "stir",  "stow",  "stub",  "stun",  "such",  "suds",  "suit",
+"sulk",  "sums",  "sung",  "sunk",  "sure",  "surf",  "swab",  "swag",
+"swam",  "swan",  "swat",  "sway",  "swim",  "swum",  "tack",  "tact",
+"tail",  "take",  "tale",  "talk",  "tall",  "tank",  "task",  "tate",
+"taut",  "teal",  "team",  "tear",  "tech",  "teem",  "teen",  "teet",
+"tell",  "tend",  "tent",  "term",  "tern",  "tess",  "test",  "than",
+"that",  "thee",  "them",  "then",  "they",  "thin",  "this",  "thud",
+"thug",  "tick",  "tide",  "tidy",  "tied",  "tier",  "tile",  "till",
+"tilt",  "time",  "tina",  "tine",  "tint",  "tiny",  "tire",  "toad",
+"togo",  "toil",  "told",  "toll",  "tone",  "tong",  "tony",  "took",
+"tool",  "toot",  "tore",  "torn",  "tote",  "tour",  "tout",  "town",
+"trag",  "tram",  "tray",  "tree",  "trek",  "trig",  "trim",  "trio",
+"trod",  "trot",  "troy",  "true",  "tuba",  "tube",  "tuck",  "tuft",
+"tuna",  "tune",  "tung",  "turf",  "turn",  "tusk",  "twig",  "twin",
+"twit",  "ulan",  "unit",  "urge",  "used",  "user",  "uses",  "utah",
+"vail",  "vain",  "vale",  "vary",  "vase",  "vast",  "veal",  "veda",
+"veil",  "vein",  "vend",  "vent",  "verb",  "very",  "veto",  "vice",
+"view",  "vine",  "vise",  "void",  "volt",  "vote",  "wack",  "wade",
+"wage",  "wail",  "wait",  "wake",  "wale",  "walk",  "wall",  "walt",
+"wand",  "wane",  "wang",  "want",  "ward",  "warm",  "warn",  "wart",
+"wash",  "wast",  "wats",  "watt",  "wave",  "wavy",  "ways",  "weak",
+"weal",  "wean",  "wear",  "weed",  "week",  "weir",  "weld",  "well",
+"welt",  "went",  "were",  "wert",  "west",  "wham",  "what",  "whee",
+"when",  "whet",  "whoa",  "whom",  "wick",  "wife",  "wild",  "will",
+"wind",  "wine",  "wing",  "wink",  "wino",  "wire",  "wise",  "wish",
+"with",  "wolf",  "wont",  "wood",  "wool",  "word",  "wore",  "work",
+"worm",  "worn",  "wove",  "writ",  "wynn",  "yale",  "yang",  "yank",
+"yard",  "yarn",  "yawl",  "yawn",  "yeah",  "year",  "yell",  "yoga",
+"yoke"   };
+
+const char *getSkeyWd(unsigned int n)
+{
+	return skeylist[n & 0x7ff];
+}