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/*
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__ */
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