diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/openpgp/clearsign')
| -rw-r--r-- | vendor/golang.org/x/crypto/openpgp/clearsign/clearsign.go | 376 | ||||
| -rw-r--r-- | vendor/golang.org/x/crypto/openpgp/clearsign/clearsign_test.go | 210 |
2 files changed, 0 insertions, 586 deletions
diff --git a/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign.go b/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign.go deleted file mode 100644 index def4cab..0000000 --- a/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign.go +++ /dev/null @@ -1,376 +0,0 @@ -// Copyright 2012 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package clearsign generates and processes OpenPGP, clear-signed data. See -// RFC 4880, section 7. -// -// Clearsigned messages are cryptographically signed, but the contents of the -// message are kept in plaintext so that it can be read without special tools. -package clearsign // import "golang.org/x/crypto/openpgp/clearsign" - -import ( - "bufio" - "bytes" - "crypto" - "hash" - "io" - "net/textproto" - "strconv" - - "golang.org/x/crypto/openpgp/armor" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/packet" -) - -// A Block represents a clearsigned message. A signature on a Block can -// be checked by passing Bytes into openpgp.CheckDetachedSignature. -type Block struct { - Headers textproto.MIMEHeader // Optional message headers - Plaintext []byte // The original message text - Bytes []byte // The signed message - ArmoredSignature *armor.Block // The signature block -} - -// start is the marker which denotes the beginning of a clearsigned message. -var start = []byte("\n-----BEGIN PGP SIGNED MESSAGE-----") - -// dashEscape is prefixed to any lines that begin with a hyphen so that they -// can't be confused with endText. -var dashEscape = []byte("- ") - -// endText is a marker which denotes the end of the message and the start of -// an armored signature. -var endText = []byte("-----BEGIN PGP SIGNATURE-----") - -// end is a marker which denotes the end of the armored signature. -var end = []byte("\n-----END PGP SIGNATURE-----") - -var crlf = []byte("\r\n") -var lf = byte('\n') - -// getLine returns the first \r\n or \n delineated line from the given byte -// array. The line does not include the \r\n or \n. The remainder of the byte -// array (also not including the new line bytes) is also returned and this will -// always be smaller than the original argument. -func getLine(data []byte) (line, rest []byte) { - i := bytes.Index(data, []byte{'\n'}) - var j int - if i < 0 { - i = len(data) - j = i - } else { - j = i + 1 - if i > 0 && data[i-1] == '\r' { - i-- - } - } - return data[0:i], data[j:] -} - -// Decode finds the first clearsigned message in data and returns it, as well -// as the suffix of data which remains after the message. -func Decode(data []byte) (b *Block, rest []byte) { - // start begins with a newline. However, at the very beginning of - // the byte array, we'll accept the start string without it. - rest = data - if bytes.HasPrefix(data, start[1:]) { - rest = rest[len(start)-1:] - } else if i := bytes.Index(data, start); i >= 0 { - rest = rest[i+len(start):] - } else { - return nil, data - } - - // Consume the start line. - _, rest = getLine(rest) - - var line []byte - b = &Block{ - Headers: make(textproto.MIMEHeader), - } - - // Next come a series of header lines. - for { - // This loop terminates because getLine's second result is - // always smaller than its argument. - if len(rest) == 0 { - return nil, data - } - // An empty line marks the end of the headers. - if line, rest = getLine(rest); len(line) == 0 { - break - } - - i := bytes.Index(line, []byte{':'}) - if i == -1 { - return nil, data - } - - key, val := line[0:i], line[i+1:] - key = bytes.TrimSpace(key) - val = bytes.TrimSpace(val) - b.Headers.Add(string(key), string(val)) - } - - firstLine := true - for { - start := rest - - line, rest = getLine(rest) - if len(line) == 0 && len(rest) == 0 { - // No armored data was found, so this isn't a complete message. - return nil, data - } - if bytes.Equal(line, endText) { - // Back up to the start of the line because armor expects to see the - // header line. - rest = start - break - } - - // The final CRLF isn't included in the hash so we don't write it until - // we've seen the next line. - if firstLine { - firstLine = false - } else { - b.Bytes = append(b.Bytes, crlf...) - } - - if bytes.HasPrefix(line, dashEscape) { - line = line[2:] - } - line = bytes.TrimRight(line, " \t") - b.Bytes = append(b.Bytes, line...) - - b.Plaintext = append(b.Plaintext, line...) - b.Plaintext = append(b.Plaintext, lf) - } - - // We want to find the extent of the armored data (including any newlines at - // the end). - i := bytes.Index(rest, end) - if i == -1 { - return nil, data - } - i += len(end) - for i < len(rest) && (rest[i] == '\r' || rest[i] == '\n') { - i++ - } - armored := rest[:i] - rest = rest[i:] - - var err error - b.ArmoredSignature, err = armor.Decode(bytes.NewBuffer(armored)) - if err != nil { - return nil, data - } - - return b, rest -} - -// A dashEscaper is an io.WriteCloser which processes the body of a clear-signed -// message. The clear-signed message is written to buffered and a hash, suitable -// for signing, is maintained in h. -// -// When closed, an armored signature is created and written to complete the -// message. -type dashEscaper struct { - buffered *bufio.Writer - h hash.Hash - hashType crypto.Hash - - atBeginningOfLine bool - isFirstLine bool - - whitespace []byte - byteBuf []byte // a one byte buffer to save allocations - - privateKey *packet.PrivateKey - config *packet.Config -} - -func (d *dashEscaper) Write(data []byte) (n int, err error) { - for _, b := range data { - d.byteBuf[0] = b - - if d.atBeginningOfLine { - // The final CRLF isn't included in the hash so we have to wait - // until this point (the start of the next line) before writing it. - if !d.isFirstLine { - d.h.Write(crlf) - } - d.isFirstLine = false - } - - // Any whitespace at the end of the line has to be removed so we - // buffer it until we find out whether there's more on this line. - if b == ' ' || b == '\t' || b == '\r' { - d.whitespace = append(d.whitespace, b) - d.atBeginningOfLine = false - continue - } - - if d.atBeginningOfLine { - // At the beginning of a line, hyphens have to be escaped. - if b == '-' { - // The signature isn't calculated over the dash-escaped text so - // the escape is only written to buffered. - if _, err = d.buffered.Write(dashEscape); err != nil { - return - } - d.h.Write(d.byteBuf) - d.atBeginningOfLine = false - } else if b == '\n' { - // Nothing to do because we delay writing CRLF to the hash. - } else { - d.h.Write(d.byteBuf) - d.atBeginningOfLine = false - } - if err = d.buffered.WriteByte(b); err != nil { - return - } - } else { - if b == '\n' { - // We got a raw \n. Drop any trailing whitespace and write a - // CRLF. - d.whitespace = d.whitespace[:0] - // We delay writing CRLF to the hash until the start of the - // next line. - if err = d.buffered.WriteByte(b); err != nil { - return - } - d.atBeginningOfLine = true - } else { - // Any buffered whitespace wasn't at the end of the line so - // we need to write it out. - if len(d.whitespace) > 0 { - d.h.Write(d.whitespace) - if _, err = d.buffered.Write(d.whitespace); err != nil { - return - } - d.whitespace = d.whitespace[:0] - } - d.h.Write(d.byteBuf) - if err = d.buffered.WriteByte(b); err != nil { - return - } - } - } - } - - n = len(data) - return -} - -func (d *dashEscaper) Close() (err error) { - if !d.atBeginningOfLine { - if err = d.buffered.WriteByte(lf); err != nil { - return - } - } - sig := new(packet.Signature) - sig.SigType = packet.SigTypeText - sig.PubKeyAlgo = d.privateKey.PubKeyAlgo - sig.Hash = d.hashType - sig.CreationTime = d.config.Now() - sig.IssuerKeyId = &d.privateKey.KeyId - - if err = sig.Sign(d.h, d.privateKey, d.config); err != nil { - return - } - - out, err := armor.Encode(d.buffered, "PGP SIGNATURE", nil) - if err != nil { - return - } - - if err = sig.Serialize(out); err != nil { - return - } - if err = out.Close(); err != nil { - return - } - if err = d.buffered.Flush(); err != nil { - return - } - return -} - -// Encode returns a WriteCloser which will clear-sign a message with privateKey -// and write it to w. If config is nil, sensible defaults are used. -func Encode(w io.Writer, privateKey *packet.PrivateKey, config *packet.Config) (plaintext io.WriteCloser, err error) { - if privateKey.Encrypted { - return nil, errors.InvalidArgumentError("signing key is encrypted") - } - - hashType := config.Hash() - name := nameOfHash(hashType) - if len(name) == 0 { - return nil, errors.UnsupportedError("unknown hash type: " + strconv.Itoa(int(hashType))) - } - - if !hashType.Available() { - return nil, errors.UnsupportedError("unsupported hash type: " + strconv.Itoa(int(hashType))) - } - h := hashType.New() - - buffered := bufio.NewWriter(w) - // start has a \n at the beginning that we don't want here. - if _, err = buffered.Write(start[1:]); err != nil { - return - } - if err = buffered.WriteByte(lf); err != nil { - return - } - if _, err = buffered.WriteString("Hash: "); err != nil { - return - } - if _, err = buffered.WriteString(name); err != nil { - return - } - if err = buffered.WriteByte(lf); err != nil { - return - } - if err = buffered.WriteByte(lf); err != nil { - return - } - - plaintext = &dashEscaper{ - buffered: buffered, - h: h, - hashType: hashType, - - atBeginningOfLine: true, - isFirstLine: true, - - byteBuf: make([]byte, 1), - - privateKey: privateKey, - config: config, - } - - return -} - -// nameOfHash returns the OpenPGP name for the given hash, or the empty string -// if the name isn't known. See RFC 4880, section 9.4. -func nameOfHash(h crypto.Hash) string { - switch h { - case crypto.MD5: - return "MD5" - case crypto.SHA1: - return "SHA1" - case crypto.RIPEMD160: - return "RIPEMD160" - case crypto.SHA224: - return "SHA224" - case crypto.SHA256: - return "SHA256" - case crypto.SHA384: - return "SHA384" - case crypto.SHA512: - return "SHA512" - } - return "" -} diff --git a/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign_test.go b/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign_test.go deleted file mode 100644 index 2c09480..0000000 --- a/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign_test.go +++ /dev/null @@ -1,210 +0,0 @@ -// Copyright 2012 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package clearsign - -import ( - "bytes" - "golang.org/x/crypto/openpgp" - "testing" -) - -func testParse(t *testing.T, input []byte, expected, expectedPlaintext string) { - b, rest := Decode(input) - if b == nil { - t.Fatal("failed to decode clearsign message") - } - if !bytes.Equal(rest, []byte("trailing")) { - t.Errorf("unexpected remaining bytes returned: %s", string(rest)) - } - if b.ArmoredSignature.Type != "PGP SIGNATURE" { - t.Errorf("bad armor type, got:%s, want:PGP SIGNATURE", b.ArmoredSignature.Type) - } - if !bytes.Equal(b.Bytes, []byte(expected)) { - t.Errorf("bad body, got:%x want:%x", b.Bytes, expected) - } - - if !bytes.Equal(b.Plaintext, []byte(expectedPlaintext)) { - t.Errorf("bad plaintext, got:%x want:%x", b.Plaintext, expectedPlaintext) - } - - keyring, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(signingKey)) - if err != nil { - t.Errorf("failed to parse public key: %s", err) - } - - if _, err := openpgp.CheckDetachedSignature(keyring, bytes.NewBuffer(b.Bytes), b.ArmoredSignature.Body); err != nil { - t.Errorf("failed to check signature: %s", err) - } -} - -func TestParse(t *testing.T) { - testParse(t, clearsignInput, "Hello world\r\nline 2", "Hello world\nline 2\n") - testParse(t, clearsignInput2, "\r\n\r\n(This message has a couple of blank lines at the start and end.)\r\n\r\n", "\n\n(This message has a couple of blank lines at the start and end.)\n\n\n") -} - -func TestParseInvalid(t *testing.T) { - if b, _ := Decode(clearsignInput3); b != nil { - t.Fatal("decoded a bad clearsigned message without any error") - } -} - -func TestParseWithNoNewlineAtEnd(t *testing.T) { - input := clearsignInput - input = input[:len(input)-len("trailing")-1] - b, rest := Decode(input) - if b == nil { - t.Fatal("failed to decode clearsign message") - } - if len(rest) > 0 { - t.Errorf("unexpected remaining bytes returned: %s", string(rest)) - } -} - -var signingTests = []struct { - in, signed, plaintext string -}{ - {"", "", ""}, - {"a", "a", "a\n"}, - {"a\n", "a", "a\n"}, - {"-a\n", "-a", "-a\n"}, - {"--a\nb", "--a\r\nb", "--a\nb\n"}, - // leading whitespace - {" a\n", " a", " a\n"}, - {" a\n", " a", " a\n"}, - // trailing whitespace (should be stripped) - {"a \n", "a", "a\n"}, - {"a ", "a", "a\n"}, - // whitespace-only lines (should be stripped) - {" \n", "", "\n"}, - {" ", "", "\n"}, - {"a\n \n \nb\n", "a\r\n\r\n\r\nb", "a\n\n\nb\n"}, -} - -func TestSigning(t *testing.T) { - keyring, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(signingKey)) - if err != nil { - t.Errorf("failed to parse public key: %s", err) - } - - for i, test := range signingTests { - var buf bytes.Buffer - - plaintext, err := Encode(&buf, keyring[0].PrivateKey, nil) - if err != nil { - t.Errorf("#%d: error from Encode: %s", i, err) - continue - } - if _, err := plaintext.Write([]byte(test.in)); err != nil { - t.Errorf("#%d: error from Write: %s", i, err) - continue - } - if err := plaintext.Close(); err != nil { - t.Fatalf("#%d: error from Close: %s", i, err) - continue - } - - b, _ := Decode(buf.Bytes()) - if b == nil { - t.Errorf("#%d: failed to decode clearsign message", i) - continue - } - if !bytes.Equal(b.Bytes, []byte(test.signed)) { - t.Errorf("#%d: bad result, got:%x, want:%x", i, b.Bytes, test.signed) - continue - } - if !bytes.Equal(b.Plaintext, []byte(test.plaintext)) { - t.Errorf("#%d: bad result, got:%x, want:%x", i, b.Plaintext, test.plaintext) - continue - } - - if _, err := openpgp.CheckDetachedSignature(keyring, bytes.NewBuffer(b.Bytes), b.ArmoredSignature.Body); err != nil { - t.Errorf("#%d: failed to check signature: %s", i, err) - } - } -} - -var clearsignInput = []byte(` -;lasjlkfdsa - ------BEGIN PGP SIGNED MESSAGE----- -Hash: SHA1 - -Hello world -line 2 ------BEGIN PGP SIGNATURE----- -Version: GnuPG v1.4.10 (GNU/Linux) - -iJwEAQECAAYFAk8kMuEACgkQO9o98PRieSpMsAQAhmY/vwmNpflrPgmfWsYhk5O8 -pjnBUzZwqTDoDeINjZEoPDSpQAHGhjFjgaDx/Gj4fAl0dM4D0wuUEBb6QOrwflog -2A2k9kfSOMOtk0IH/H5VuFN1Mie9L/erYXjTQIptv9t9J7NoRBMU0QOOaFU0JaO9 -MyTpno24AjIAGb+mH1U= -=hIJ6 ------END PGP SIGNATURE----- -trailing`) - -var clearsignInput2 = []byte(` -asdlfkjasdlkfjsadf - ------BEGIN PGP SIGNED MESSAGE----- -Hash: SHA256 - - - -(This message has a couple of blank lines at the start and end.) - - ------BEGIN PGP SIGNATURE----- -Version: GnuPG v1.4.11 (GNU/Linux) - -iJwEAQEIAAYFAlPpSREACgkQO9o98PRieSpZTAP+M8QUoCt/7Rf3YbXPcdzIL32v -pt1I+cMNeopzfLy0u4ioEFi8s5VkwpL1AFmirvgViCwlf82inoRxzZRiW05JQ5LI -ESEzeCoy2LIdRCQ2hcrG8pIUPzUO4TqO5D/dMbdHwNH4h5nNmGJUAEG6FpURlPm+ -qZg6BaTvOxepqOxnhVU= -=e+C6 ------END PGP SIGNATURE----- - -trailing`) - -var clearsignInput3 = []byte(` ------BEGIN PGP SIGNED MESSAGE----- -Hash: SHA256 - -(This message was truncated.) -`) - -var signingKey = `-----BEGIN PGP PRIVATE KEY BLOCK----- -Version: GnuPG v1.4.10 (GNU/Linux) - -lQHYBE2rFNoBBADFwqWQIW/DSqcB4yCQqnAFTJ27qS5AnB46ccAdw3u4Greeu3Bp -idpoHdjULy7zSKlwR1EA873dO/k/e11Ml3dlAFUinWeejWaK2ugFP6JjiieSsrKn -vWNicdCS4HTWn0X4sjl0ZiAygw6GNhqEQ3cpLeL0g8E9hnYzJKQ0LWJa0QARAQAB -AAP/TB81EIo2VYNmTq0pK1ZXwUpxCrvAAIG3hwKjEzHcbQznsjNvPUihZ+NZQ6+X -0HCfPAdPkGDCLCb6NavcSW+iNnLTrdDnSI6+3BbIONqWWdRDYJhqZCkqmG6zqSfL -IdkJgCw94taUg5BWP/AAeQrhzjChvpMQTVKQL5mnuZbUCeMCAN5qrYMP2S9iKdnk -VANIFj7656ARKt/nf4CBzxcpHTyB8+d2CtPDKCmlJP6vL8t58Jmih+kHJMvC0dzn -gr5f5+sCAOOe5gt9e0am7AvQWhdbHVfJU0TQJx+m2OiCJAqGTB1nvtBLHdJnfdC9 -TnXXQ6ZXibqLyBies/xeY2sCKL5qtTMCAKnX9+9d/5yQxRyrQUHt1NYhaXZnJbHx -q4ytu0eWz+5i68IYUSK69jJ1NWPM0T6SkqpB3KCAIv68VFm9PxqG1KmhSrQIVGVz -dCBLZXmIuAQTAQIAIgUCTasU2gIbAwYLCQgHAwIGFQgCCQoLBBYCAwECHgECF4AA -CgkQO9o98PRieSoLhgQAkLEZex02Qt7vGhZzMwuN0R22w3VwyYyjBx+fM3JFETy1 -ut4xcLJoJfIaF5ZS38UplgakHG0FQ+b49i8dMij0aZmDqGxrew1m4kBfjXw9B/v+ -eIqpODryb6cOSwyQFH0lQkXC040pjq9YqDsO5w0WYNXYKDnzRV0p4H1pweo2VDid -AdgETasU2gEEAN46UPeWRqKHvA99arOxee38fBt2CI08iiWyI8T3J6ivtFGixSqV -bRcPxYO/qLpVe5l84Nb3X71GfVXlc9hyv7CD6tcowL59hg1E/DC5ydI8K8iEpUmK -/UnHdIY5h8/kqgGxkY/T/hgp5fRQgW1ZoZxLajVlMRZ8W4tFtT0DeA+JABEBAAEA -A/0bE1jaaZKj6ndqcw86jd+QtD1SF+Cf21CWRNeLKnUds4FRRvclzTyUMuWPkUeX -TaNNsUOFqBsf6QQ2oHUBBK4VCHffHCW4ZEX2cd6umz7mpHW6XzN4DECEzOVksXtc -lUC1j4UB91DC/RNQqwX1IV2QLSwssVotPMPqhOi0ZLNY7wIA3n7DWKInxYZZ4K+6 -rQ+POsz6brEoRHwr8x6XlHenq1Oki855pSa1yXIARoTrSJkBtn5oI+f8AzrnN0BN -oyeQAwIA/7E++3HDi5aweWrViiul9cd3rcsS0dEnksPhvS0ozCJiHsq/6GFmy7J8 -QSHZPteedBnZyNp5jR+H7cIfVN3KgwH/Skq4PsuPhDq5TKK6i8Pc1WW8MA6DXTdU -nLkX7RGmMwjC0DBf7KWAlPjFaONAX3a8ndnz//fy1q7u2l9AZwrj1qa1iJ8EGAEC -AAkFAk2rFNoCGwwACgkQO9o98PRieSo2/QP/WTzr4ioINVsvN1akKuekmEMI3LAp -BfHwatufxxP1U+3Si/6YIk7kuPB9Hs+pRqCXzbvPRrI8NHZBmc8qIGthishdCYad -AHcVnXjtxrULkQFGbGvhKURLvS9WnzD/m1K2zzwxzkPTzT9/Yf06O6Mal5AdugPL -VrM0m72/jnpKo04= -=zNCn ------END PGP PRIVATE KEY BLOCK----- -` |