diff options
Diffstat (limited to 'release/src/router/cyassl/ctaocrypt/src/coding.c')
| -rw-r--r-- | release/src/router/cyassl/ctaocrypt/src/coding.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/release/src/router/cyassl/ctaocrypt/src/coding.c b/release/src/router/cyassl/ctaocrypt/src/coding.c new file mode 100644 index 00000000..5ffabf17 --- /dev/null +++ b/release/src/router/cyassl/ctaocrypt/src/coding.c @@ -0,0 +1,229 @@ +/* coding.c + * + * Copyright (C) 2006-2011 Sawtooth Consulting Ltd. + * + * This file is part of CyaSSL. + * + * CyaSSL is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * CyaSSL is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + + +#include "coding.h" + + +enum { + BAD = 0xFF, /* invalid encoding */ + PAD = '=', + PEM_LINE_SZ = 64 +}; + + +static +const byte base64Decode[] = { 62, BAD, BAD, BAD, 63, /* + starts at 0x2B */ + 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, + BAD, BAD, BAD, BAD, BAD, BAD, BAD, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, + 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, + 20, 21, 22, 23, 24, 25, + BAD, BAD, BAD, BAD, BAD, BAD, + 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, + 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, + 46, 47, 48, 49, 50, 51 + }; + + +int Base64Decode(const byte* in, word32 inLen, byte* out, word32* outLen) +{ + word32 i = 0; + word32 j = 0; + word32 plainSz = inLen - ((inLen + (PEM_LINE_SZ - 1)) / PEM_LINE_SZ ); + + plainSz = (plainSz * 3 + 3) / 4; + if (plainSz > *outLen) return -1; + + while (inLen > 3) { + byte b1, b2, b3; + byte e1 = in[j++]; + byte e2 = in[j++]; + byte e3 = in[j++]; + byte e4 = in[j++]; + + int pad3 = 0; + int pad4 = 0; + + if (e1 == 0) /* end file 0's */ + break; + if (e3 == PAD) + pad3 = 1; + if (e4 == PAD) + pad4 = 1; + + e1 = base64Decode[e1 - 0x2B]; + e2 = base64Decode[e2 - 0x2B]; + e3 = (e3 == PAD) ? 0 : base64Decode[e3 - 0x2B]; + e4 = (e4 == PAD) ? 0 : base64Decode[e4 - 0x2B]; + + b1 = (e1 << 2) | (e2 >> 4); + b2 = ((e2 & 0xF) << 4) | (e3 >> 2); + b3 = ((e3 & 0x3) << 6) | e4; + + out[i++] = b1; + if (!pad3) + out[i++] = b2; + if (!pad4) + out[i++] = b3; + else + break; + + inLen -= 4; + if (in[j] == ' ' || in[j] == '\r' || in[j] == '\n') { + byte endLine = in[j++]; + inLen--; + while (endLine == ' ') { /* allow trailing whitespace */ + endLine = in[j++]; + inLen--; + } + if (endLine == '\r') { + endLine = in[j++]; + inLen--; + } + if (endLine != '\n') + return -1; + } + } + *outLen = i; + + return 0; +} + + +#if defined(OPENSSL_EXTRA) || defined (SESSION_CERTS) || defined(CYASSL_KEY_GEN) || defined(CYASSL_CERT_GEN) || defined(HAVE_WEBSERVER) + +static +const byte base64Encode[] = { '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', + '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', + '+', '/' + }; + + +/* porting assistance from yaSSL by Raphael HUCK */ +int Base64Encode(const byte* in, word32 inLen, byte* out, word32* outLen) +{ + word32 i = 0, + j = 0, + n = 0; /* new line counter */ + + word32 outSz = (inLen + 3 - 1) / 3 * 4; + outSz += (outSz + PEM_LINE_SZ - 1) / PEM_LINE_SZ; /* new lines */ + + if (outSz > *outLen) return -1; + + while (inLen > 2) { + byte b1 = in[j++]; + byte b2 = in[j++]; + byte b3 = in[j++]; + + /* encoded idx */ + byte e1 = b1 >> 2; + byte e2 = ((b1 & 0x3) << 4) | (b2 >> 4); + byte e3 = ((b2 & 0xF) << 2) | (b3 >> 6); + byte e4 = b3 & 0x3F; + + /* store */ + out[i++] = base64Encode[e1]; + out[i++] = base64Encode[e2]; + out[i++] = base64Encode[e3]; + out[i++] = base64Encode[e4]; + + inLen -= 3; + + if ((++n % (PEM_LINE_SZ / 4)) == 0 && inLen) + out[i++] = '\n'; + } + + /* last integral */ + if (inLen) { + int twoBytes = (inLen == 2); + + byte b1 = in[j++]; + byte b2 = (twoBytes) ? in[j++] : 0; + + byte e1 = b1 >> 2; + byte e2 = ((b1 & 0x3) << 4) | (b2 >> 4); + byte e3 = (b2 & 0xF) << 2; + + out[i++] = base64Encode[e1]; + out[i++] = base64Encode[e2]; + out[i++] = (twoBytes) ? base64Encode[e3] : PAD; + out[i++] = PAD; + } + + out[i++] = '\n'; + if (i != outSz) + return -1; + *outLen = outSz; + + return 0; +} + + +static +const byte hexDecode[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, + BAD, BAD, BAD, BAD, BAD, BAD, BAD, + 10, 11, 12, 13, 14, 15 + }; /* A starts at 0x41 not 0x3A */ + +int Base16Decode(const byte* in, word32 inLen, byte* out, word32* outLen) +{ + word32 inIdx = 0; + word32 outIdx = 0; + + if (inLen % 2) + return -1; + + if (*outLen < (inLen / 2)) + return -1; + + while (inLen) { + byte b = in[inIdx++] - 0x30; /* 0 starts at 0x30 */ + byte b2 = in[inIdx++] - 0x30; + + /* sanity checks */ + if (b >= sizeof(hexDecode)/sizeof(hexDecode[0])) + return -1; + if (b2 >= sizeof(hexDecode)/sizeof(hexDecode[0])) + return -1; + + b = hexDecode[b]; + b2 = hexDecode[b2]; + + if (b == BAD || b2 == BAD) + return -1; + + out[outIdx++] = (b << 4) | b2; + inLen -= 2; + } + + *outLen = outIdx; + return 0; +} + + +#endif /* OPENSSL_EXTRA */ |