summaryrefslogtreecommitdiff
path: root/source3/lib/hmacmd5.c
diff options
context:
space:
mode:
Diffstat (limited to 'source3/lib/hmacmd5.c')
-rw-r--r--source3/lib/hmacmd5.c119
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);
+}