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Diffstat (limited to 'source3/lib/hmacmd5.c')
| -rw-r--r-- | source3/lib/hmacmd5.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/source3/lib/hmacmd5.c b/source3/lib/hmacmd5.c new file mode 100644 index 0000000000..9821afdc1d --- /dev/null +++ b/source3/lib/hmacmd5.c @@ -0,0 +1,119 @@ +/* + Unix SMB/Netbios implementation. + Version 1.9. + Interface header: Scheduler service + Copyright (C) Luke Kenneth Casson Leighton 1996-1999 + Copyright (C) Andrew Tridgell 1992-1999 + + This program 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. + + This program 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., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* taken direct from rfc2104 implementation and modified for suitable use + * for ntlmv2. + */ + +#include "includes.h" + +/*********************************************************************** + the rfc 2104 version of hmac_md5 initialisation. +***********************************************************************/ +void hmac_md5_init_rfc2104(uchar* key, int key_len, HMACMD5Context *ctx) +{ + int i; + + /* if key is longer than 64 bytes reset it to key=MD5(key) */ + if (key_len > 64) + { + uchar tk[16]; + struct MD5Context tctx; + + MD5Init(&tctx); + MD5Update(&tctx, key, key_len); + MD5Final(tk, &tctx); + + key = tk; + key_len = 16; + } + + /* start out by storing key in pads */ + bzero( ctx->k_ipad, sizeof ctx->k_ipad); + bzero( ctx->k_opad, sizeof ctx->k_opad); + bcopy( key, ctx->k_ipad, key_len); + bcopy( key, ctx->k_opad, key_len); + + /* XOR key with ipad and opad values */ + for (i=0; i<64; i++) + { + ctx->k_ipad[i] ^= 0x36; + ctx->k_opad[i] ^= 0x5c; + } + + MD5Init(&ctx->ctx); + MD5Update(&ctx->ctx, ctx->k_ipad, 64); +} + +/*********************************************************************** + the microsoft version of hmac_md5 initialisation. +***********************************************************************/ +void hmac_md5_init_limK_to_64(uchar* key, int key_len, HMACMD5Context *ctx) +{ + int i; + + /* if key is longer than 64 bytes truncate it */ + if (key_len > 64) + { + key_len = 64; + } + + /* start out by storing key in pads */ + bzero( ctx->k_ipad, sizeof ctx->k_ipad); + bzero( ctx->k_opad, sizeof ctx->k_opad); + bcopy( key, ctx->k_ipad, key_len); + bcopy( key, ctx->k_opad, key_len); + + /* XOR key with ipad and opad values */ + for (i=0; i<64; i++) + { + ctx->k_ipad[i] ^= 0x36; + ctx->k_opad[i] ^= 0x5c; + } + + MD5Init(&ctx->ctx); + MD5Update(&ctx->ctx, ctx->k_ipad, 64); +} + +/*********************************************************************** + update hmac_md5 "inner" buffer +***********************************************************************/ +void hmac_md5_update(uchar* text, int text_len, HMACMD5Context *ctx) +{ + MD5Update(&ctx->ctx, text, text_len); /* then text of datagram */ +} + +/*********************************************************************** + finish off hmac_md5 "inner" buffer and generate outer one. +***********************************************************************/ +void hmac_md5_final(caddr_t digest, HMACMD5Context *ctx) + +{ + struct MD5Context ctx_o; + + MD5Final(digest, &ctx->ctx); + + MD5Init(&ctx_o); + MD5Update(&ctx_o, ctx->k_opad, 64); + MD5Update(&ctx_o, digest, 16); + MD5Final(digest, &ctx_o); +} |