From 7be19ad10fc30fab199653facd11496170219e1b Mon Sep 17 00:00:00 2001 From: Andrew Bartlett Date: Sat, 7 Jul 2001 07:00:15 +0000 Subject: Add backend encryption support for NTLMv2. The leg-work for this was done by the folks at samba-tng.org, I'm just bringing it accross to HEAD. The MD5 implementation is seperatly derived, and does not have the copyright problems that the one in TNG has. Also add const to a few places where it makes sence. Andrew Bartlett (This used to be commit 8df8e841445dfe09fc7a06bb55d12adc3fecb345) --- source3/Makefile.in | 4 +- source3/include/hmacmd5.h | 33 ++++++ source3/include/includes.h | 3 + source3/include/md5.h | 21 ++++ source3/lib/hmacmd5.c | 136 ++++++++++++++++++++++++ source3/lib/md4.c | 6 +- source3/lib/md5.c | 245 ++++++++++++++++++++++++++++++++++++++++++++ source3/lib/util.c | 6 +- source3/libsmb/smbdes.c | 8 +- source3/libsmb/smbencrypt.c | 97 +++++++++++++++++- 10 files changed, 546 insertions(+), 13 deletions(-) create mode 100644 source3/include/hmacmd5.h create mode 100644 source3/include/md5.h create mode 100644 source3/lib/hmacmd5.c create mode 100644 source3/lib/md5.c diff --git a/source3/Makefile.in b/source3/Makefile.in index 6aec0df336..7006152cbb 100644 --- a/source3/Makefile.in +++ b/source3/Makefile.in @@ -109,8 +109,8 @@ LIB_OBJ = lib/charcnv.o lib/debug.o lib/fault.o \ lib/util.o lib/util_sock.o lib/util_sec.o smbd/ssl.o \ lib/talloc.o lib/hash.o lib/substitute.o lib/fsusage.o \ lib/ms_fnmatch.o lib/select.o lib/error.o lib/messages.o \ - lib/iconv.o \ - nsswitch/wb_client.o nsswitch/wb_common.o $(TDB_OBJ) + lib/md5.o lib/hmacmd5.o lib/iconv.o \ + nsswitch/wb_client.o nsswitch/wb_common.o $(TDB_OBJ) READLINE_OBJ = lib/readline.o diff --git a/source3/include/hmacmd5.h b/source3/include/hmacmd5.h new file mode 100644 index 0000000000..adb52058a8 --- /dev/null +++ b/source3/include/hmacmd5.h @@ -0,0 +1,33 @@ +/* + 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. +*/ + +#ifndef _HMAC_MD5_H + +typedef struct +{ + struct MD5Context ctx; + uchar k_ipad[65]; + uchar k_opad[65]; + +} HMACMD5Context; + +#endif /* _HMAC_MD5_H */ diff --git a/source3/include/includes.h b/source3/include/includes.h index 7c1a4a8607..3d6147f587 100644 --- a/source3/include/includes.h +++ b/source3/include/includes.h @@ -663,6 +663,9 @@ extern int errno; #include "mapping.h" +#include "md5.h" +#include "hmacmd5.h" + #ifndef MAXCODEPAGELINES #define MAXCODEPAGELINES 256 #endif diff --git a/source3/include/md5.h b/source3/include/md5.h new file mode 100644 index 0000000000..3737092c86 --- /dev/null +++ b/source3/include/md5.h @@ -0,0 +1,21 @@ +#ifndef MD5_H +#define MD5_H + +struct MD5Context { + uint32 buf[4]; + uint32 bits[2]; + unsigned char in[64]; +}; + +void MD5Init(struct MD5Context *context); +void MD5Update(struct MD5Context *context, unsigned char const *buf, + unsigned len); +void MD5Final(unsigned char digest[16], struct MD5Context *context); +void MD5Transform(uint32 buf[4], uint32 const in[16]); + +/* + * This is needed to make RSAREF happy on some MS-DOS compilers. + */ +typedef struct MD5Context MD5_CTX; + +#endif /* !MD5_H */ diff --git a/source3/lib/hmacmd5.c b/source3/lib/hmacmd5.c new file mode 100644 index 0000000000..1d9b89e0cc --- /dev/null +++ b/source3/lib/hmacmd5.c @@ -0,0 +1,136 @@ +/* + Unix SMB/Netbios implementation. + Version 1.9. + HMAC MD5 code for use in NTLMv2 + Copyright (C) Luke Kenneth Casson Leighton 1996-2000 + Copyright (C) Andrew Tridgell 1992-2000 + + 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 */ + ZERO_STRUCT(ctx->k_ipad); + ZERO_STRUCT(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(const 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 */ + ZERO_STRUCT(ctx->k_ipad); + ZERO_STRUCT(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(const 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(uchar *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); +} + +/*********************************************************** + single function to calculate an HMAC MD5 digest from data. + use the microsoft hmacmd5 init method because the key is 16 bytes. +************************************************************/ +void hmac_md5( uchar key[16], uchar* data, int data_len, uchar* digest) +{ + HMACMD5Context ctx; + hmac_md5_init_limK_to_64(key, 16, &ctx); + if (data_len != 0) + { + hmac_md5_update(data, data_len, &ctx); + } + hmac_md5_final(digest, &ctx); +} + diff --git a/source3/lib/md4.c b/source3/lib/md4.c index 30f2b6b8c6..95fd90512c 100644 --- a/source3/lib/md4.c +++ b/source3/lib/md4.c @@ -101,7 +101,7 @@ static void mdfour64(uint32 *M) X[j] = 0; } -static void copy64(uint32 *M, unsigned char *in) +static void copy64(uint32 *M, const unsigned char *in) { int i; @@ -110,7 +110,7 @@ static void copy64(uint32 *M, unsigned char *in) (in[i*4+1]<<8) | (in[i*4+0]<<0); } -static void copy4(unsigned char *out,uint32 x) +static void copy4(unsigned char *out, uint32 x) { out[0] = x&0xFF; out[1] = (x>>8)&0xFF; @@ -119,7 +119,7 @@ static void copy4(unsigned char *out,uint32 x) } /* produce a md4 message digest from data of length n bytes */ -void mdfour(unsigned char *out, unsigned char *in, int n) +void mdfour(unsigned char *out, const unsigned char *in, int n) { unsigned char buf[128]; uint32 M[16]; diff --git a/source3/lib/md5.c b/source3/lib/md5.c new file mode 100644 index 0000000000..627725bb25 --- /dev/null +++ b/source3/lib/md5.c @@ -0,0 +1,245 @@ +/* + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + */ + +/* This code slightly modified to fit into Samba by + abartlet@samba.org Jun 2001 */ + +#include "includes.h" + +#include "md5.h" + +/* + * Note: this code is harmless on little-endian machines. + */ +static void byteReverse(unsigned char *buf, unsigned longs) +{ + uint32 t; + do { + t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + *(uint32 *) buf = t; + buf += 4; + } while (--longs); +} + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void MD5Init(struct MD5Context *ctx) +{ + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +/* + * Update context to reflect the concatenation of another buffer full + * of bytes. + */ +void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len) +{ + register uint32 t; + + /* Update bitcount */ + + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((uint32) len << 3)) < t) + ctx->bits[1]++; /* Carry from low to high */ + ctx->bits[1] += len >> 29; + + t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ + + /* Handle any leading odd-sized chunks */ + + if (t) { + unsigned char *p = (unsigned char *) ctx->in + t; + + t = 64 - t; + if (len < t) { + memmove(p, buf, len); + return; + } + memmove(p, buf, t); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32 *) ctx->in); + buf += t; + len -= t; + } + /* Process data in 64-byte chunks */ + + while (len >= 64) { + memmove(ctx->in, buf, 64); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32 *) ctx->in); + buf += 64; + len -= 64; + } + + /* Handle any remaining bytes of data. */ + + memmove(ctx->in, buf, len); +} + +/* + * Final wrapup - pad to 64-byte boundary with the bit pattern + * 1 0* (64-bit count of bits processed, MSB-first) + */ +void MD5Final(unsigned char digest[16], struct MD5Context *ctx) +{ + unsigned int count; + unsigned char *p; + + /* Compute number of bytes mod 64 */ + count = (ctx->bits[0] >> 3) & 0x3F; + + /* Set the first char of padding to 0x80. This is safe since there is + always at least one byte free */ + p = ctx->in + count; + *p++ = 0x80; + + /* Bytes of padding needed to make 64 bytes */ + count = 64 - 1 - count; + + /* Pad out to 56 mod 64 */ + if (count < 8) { + /* Two lots of padding: Pad the first block to 64 bytes */ + memset(p, 0, count); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32 *) ctx->in); + + /* Now fill the next block with 56 bytes */ + memset(ctx->in, 0, 56); + } else { + /* Pad block to 56 bytes */ + memset(p, 0, count - 8); + } + byteReverse(ctx->in, 14); + + /* Append length in bits and transform */ + ((uint32 *) ctx->in)[14] = ctx->bits[0]; + ((uint32 *) ctx->in)[15] = ctx->bits[1]; + + MD5Transform(ctx->buf, (uint32 *) ctx->in); + byteReverse((unsigned char *) ctx->buf, 4); + memmove(digest, ctx->buf, 16); + memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */ +} + +/* The four core functions - F1 is optimized somewhat */ + +/* #define F1(x, y, z) (x & y | ~x & z) */ +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +/* This is the central step in the MD5 algorithm. */ +#define MD5STEP(f, w, x, y, z, data, s) \ + ( w += f(x, y, z) + data, w = w<>(32-s), w += x ) + +/* + * The core of the MD5 algorithm, this alters an existing MD5 hash to + * reflect the addition of 16 longwords of new data. MD5Update blocks + * the data and converts bytes into longwords for this routine. + */ +void MD5Transform(uint32 buf[4], uint32 const in[16]) +{ + register uint32 a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} diff --git a/source3/lib/util.c b/source3/lib/util.c index d220b2c531..78e801087f 100644 --- a/source3/lib/util.c +++ b/source3/lib/util.c @@ -1450,16 +1450,16 @@ void out_data(FILE *f,char *buf1,int len, int per_line) } } -void print_asc(int level, unsigned char *buf,int len) +void print_asc(int level, const unsigned char *buf,int len) { int i; for (i=0;i