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MD5: Mormalize naming style
This commit is contained in:
Pavel Tvrdík
Ondrej Zajicek (work)
parent
90f78507f4
commit
33b4f40acc
418
lib/md5.c
418
lib/md5.c
@ -1,154 +1,159 @@
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/*
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* This code implements the MD5 message-digest algorithm.
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* The algorithm is due to Ron Rivest. This code was
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* written by Colin Plumb in 1993, no copyright is claimed.
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* This code is in the public domain; do with it what you wish.
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* BIRD Library -- MD5 Hash Function and HMAC-MD5 Function
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*
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* Equivalent code is available from RSA Data Security, Inc.
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* This code has been tested against that, and is equivalent,
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* except that you don't need to include two pages of legalese
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* with every copy.
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* (c) 2015 CZ.NIC z.s.p.o.
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*
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* To compute the message digest of a chunk of bytes, declare an
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* MD5Context structure, pass it to MD5Init, call MD5Update as
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* needed on buffers full of bytes, and then call MD5Final, which
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* will fill a supplied 16-byte array with the digest.
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* The code was written by Colin Plumb in 1993, no copyright is claimed.
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*
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* Adapted for BIRD by Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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/*
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* Adapted for BIRD by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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*/
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#include "nest/bird.h"
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#include "lib/string.h"
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#include "md5.h"
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#include "lib/md5.h"
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#ifdef CPU_LITTLE_ENDIAN
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#define byteReverse(buf, len) /* Nothing */
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#else
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void byteReverse(unsigned char *buf, unsigned longs);
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void byteReverse(byte *buf, uint longs);
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/*
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* Note: this code is harmless on little-endian machines.
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*/
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void byteReverse(unsigned char *buf, unsigned longs)
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void byteReverse(byte *buf, uint longs)
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{
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u32 t;
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do {
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t = (u32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
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((unsigned) buf[1] << 8 | buf[0]);
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*(u32 *) buf = t;
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buf += 4;
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} while (--longs);
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u32 t;
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do {
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t = (u32) ((uint) buf[3] << 8 | buf[2]) << 16 |
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((uint) buf[1] << 8 | buf[0]);
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*(u32 *) buf = t;
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buf += 4;
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} while (--longs);
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}
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#endif
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static void md5_transform(u32 buf[4], u32 const in[16]);
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/*
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* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
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* initialization constants.
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*/
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void MD5Init(struct MD5Context *ctx)
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void
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md5_init(struct md5_context *ctx)
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{
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ctx->buf[0] = 0x67452301;
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ctx->buf[1] = 0xefcdab89;
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ctx->buf[2] = 0x98badcfe;
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ctx->buf[3] = 0x10325476;
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ctx->buf[0] = 0x67452301;
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ctx->buf[1] = 0xefcdab89;
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ctx->buf[2] = 0x98badcfe;
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ctx->buf[3] = 0x10325476;
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ctx->bits[0] = 0;
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ctx->bits[1] = 0;
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ctx->bits[0] = 0;
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ctx->bits[1] = 0;
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}
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/*
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* Update context to reflect the concatenation of another buffer full
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* of bytes.
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*/
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void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len)
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void
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md5_update(struct md5_context *ctx, const byte *buf, uint len)
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{
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u32 t;
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u32 t;
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/* Update bitcount */
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/* Update bitcount */
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t = ctx->bits[0];
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if ((ctx->bits[0] = t + ((u32) len << 3)) < t)
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ctx->bits[1]++; /* Carry from low to high */
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ctx->bits[1] += len >> 29;
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t = ctx->bits[0];
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if ((ctx->bits[0] = t + ((u32) len << 3)) < t)
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ctx->bits[1]++; /* Carry from low to high */
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ctx->bits[1] += len >> 29;
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t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
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t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
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/* Handle any leading odd-sized chunks */
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/* Handle any leading odd-sized chunks */
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if (t)
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{
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byte *p = (byte *) ctx->in + t;
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if (t) {
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unsigned char *p = (unsigned char *) ctx->in + t;
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t = 64 - t;
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if (len < t) {
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memcpy(p, buf, len);
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return;
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}
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memcpy(p, buf, t);
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byteReverse(ctx->in, 16);
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MD5Transform(ctx->buf, (u32 *) ctx->in);
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buf += t;
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len -= t;
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t = 64 - t;
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if (len < t)
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{
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memcpy(p, buf, len);
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return;
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}
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/* Process data in 64-byte chunks */
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memcpy(p, buf, t);
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byteReverse(ctx->in, 16);
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md5_transform(ctx->buf, (u32 *) ctx->in);
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buf += t;
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len -= t;
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}
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while (len >= 64) {
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memcpy(ctx->in, buf, 64);
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byteReverse(ctx->in, 16);
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MD5Transform(ctx->buf, (u32 *) ctx->in);
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buf += 64;
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len -= 64;
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}
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/* Process data in 64-byte chunks */
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while (len >= 64)
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{
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memcpy(ctx->in, buf, 64);
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byteReverse(ctx->in, 16);
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md5_transform(ctx->buf, (u32 *) ctx->in);
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buf += 64;
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len -= 64;
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}
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/* Handle any remaining bytes of data. */
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memcpy(ctx->in, buf, len);
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/* Handle any remaining bytes of data. */
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memcpy(ctx->in, buf, len);
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}
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/*
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* Final wrapup - pad to 64-byte boundary with the bit pattern
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* Final wrapup - pad to 64-byte boundary with the bit pattern
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* 1 0* (64-bit count of bits processed, MSB-first)
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*/
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void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
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byte *
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md5_final(struct md5_context *ctx)
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{
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unsigned count;
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unsigned char *p;
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uint count;
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byte *p;
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/* Compute number of bytes mod 64 */
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count = (ctx->bits[0] >> 3) & 0x3F;
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/* Compute number of bytes mod 64 */
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count = (ctx->bits[0] >> 3) & 0x3F;
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/* Set the first char of padding to 0x80. This is safe since there is
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/* Set the first char of padding to 0x80. This is safe since there is
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always at least one byte free */
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p = ctx->in + count;
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*p++ = 0x80;
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p = ctx->in + count;
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*p++ = 0x80;
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/* Bytes of padding needed to make 64 bytes */
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count = 64 - 1 - count;
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/* Bytes of padding needed to make 64 bytes */
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count = 64 - 1 - count;
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/* Pad out to 56 mod 64 */
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if (count < 8) {
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/* Two lots of padding: Pad the first block to 64 bytes */
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memset(p, 0, count);
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byteReverse(ctx->in, 16);
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MD5Transform(ctx->buf, (u32 *) ctx->in);
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/* Pad out to 56 mod 64 */
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if (count < 8)
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{
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/* Two lots of padding: Pad the first block to 64 bytes */
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memset(p, 0, count);
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byteReverse(ctx->in, 16);
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md5_transform(ctx->buf, (u32 *) ctx->in);
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/* Now fill the next block with 56 bytes */
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memset(ctx->in, 0, 56);
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} else {
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/* Pad block to 56 bytes */
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memset(p, 0, count - 8);
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}
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byteReverse(ctx->in, 14);
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/* Now fill the next block with 56 bytes */
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memset(ctx->in, 0, 56);
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}
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else
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{
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/* Pad block to 56 bytes */
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memset(p, 0, count - 8);
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}
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byteReverse(ctx->in, 14);
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/* Append length in bits and transform */
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((u32 *) ctx->in)[14] = ctx->bits[0];
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((u32 *) ctx->in)[15] = ctx->bits[1];
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/* Append length in bits and transform */
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((u32 *) ctx->in)[14] = ctx->bits[0];
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((u32 *) ctx->in)[15] = ctx->bits[1];
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MD5Transform(ctx->buf, (u32 *) ctx->in);
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byteReverse((unsigned char *) ctx->buf, 4);
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memcpy(digest, ctx->buf, 16);
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memset((char *) ctx, 0, sizeof(ctx)); /* In case it's sensitive */
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md5_transform(ctx->buf, (u32 *) ctx->in);
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byteReverse((byte *) ctx->buf, 4);
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return (byte*) ctx->buf;
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}
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/* I am a hard paranoid */
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void
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md5_erase_ctx(struct md5_context *ctx)
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{
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memset((char *) ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
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}
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/* The four core functions - F1 is optimized somewhat */
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@ -161,92 +166,157 @@ void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
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/* This is the central step in the MD5 algorithm. */
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#define MD5STEP(f, w, x, y, z, data, s) \
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( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
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( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
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/*
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* The core of the MD5 algorithm, this alters an existing MD5 hash to
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* reflect the addition of 16 longwords of new data. MD5Update blocks
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* the data and converts bytes into longwords for this routine.
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*/
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void MD5Transform(u32 buf[4], u32 const in[16])
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void
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md5_transform(u32 buf[4], u32 const in[16])
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{
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register u32 a, b, c, d;
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register u32 a, b, c, d;
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a = buf[0];
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b = buf[1];
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c = buf[2];
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d = buf[3];
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a = buf[0];
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b = buf[1];
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c = buf[2];
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d = buf[3];
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MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
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MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
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MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
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MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
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MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
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MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
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MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
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MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
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MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
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MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
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MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
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MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
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MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
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MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
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MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
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MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
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MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
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MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
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MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
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MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
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MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
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MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
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MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
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MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
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MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
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MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
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MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
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MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
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MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
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MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
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MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
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MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
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MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
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MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
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MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
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MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
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MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
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MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
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MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
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MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
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MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
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MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
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MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
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MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
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MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
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MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
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MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
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MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
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MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
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MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
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MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
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MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
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MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
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MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
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MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
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MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
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MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
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MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
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MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
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MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
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MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
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MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
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MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
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MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
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MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
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MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
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MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
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MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
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MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
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MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
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MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
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MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
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MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
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MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
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MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
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MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
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MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
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MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
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MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
|
||||
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
|
||||
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);
|
||||
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;
|
||||
buf[0] += a;
|
||||
buf[1] += b;
|
||||
buf[2] += c;
|
||||
buf[3] += d;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* MD5-HMAC
|
||||
*/
|
||||
|
||||
static void
|
||||
md5_hash_buffer(byte *outbuf, const byte *buffer, size_t length)
|
||||
{
|
||||
struct md5_context hd_tmp;
|
||||
|
||||
md5_init(&hd_tmp);
|
||||
md5_update(&hd_tmp, buffer, length);
|
||||
memcpy(outbuf, md5_final(&hd_tmp), MD5_SIZE);
|
||||
}
|
||||
|
||||
void
|
||||
md5_hmac_init(struct md5_hmac_context *ctx, const byte *key, size_t keylen)
|
||||
{
|
||||
byte keybuf[MD5_BLOCK_SIZE], buf[MD5_BLOCK_SIZE];
|
||||
|
||||
/* Hash the key if necessary */
|
||||
if (keylen <= MD5_BLOCK_SIZE)
|
||||
{
|
||||
memcpy(keybuf, key, keylen);
|
||||
bzero(keybuf + keylen, MD5_BLOCK_SIZE - keylen);
|
||||
}
|
||||
else
|
||||
{
|
||||
md5_hash_buffer(keybuf, key, keylen);
|
||||
bzero(keybuf + MD5_SIZE, MD5_BLOCK_SIZE - MD5_SIZE);
|
||||
}
|
||||
|
||||
/* Initialize the inner digest */
|
||||
md5_init(&ctx->ictx);
|
||||
int i;
|
||||
for (i = 0; i < MD5_BLOCK_SIZE; i++)
|
||||
buf[i] = keybuf[i] ^ 0x36;
|
||||
md5_update(&ctx->ictx, buf, MD5_BLOCK_SIZE);
|
||||
|
||||
/* Initialize the outer digest */
|
||||
md5_init(&ctx->octx);
|
||||
for (i = 0; i < MD5_BLOCK_SIZE; i++)
|
||||
buf[i] = keybuf[i] ^ 0x5c;
|
||||
md5_update(&ctx->octx, buf, MD5_BLOCK_SIZE);
|
||||
}
|
||||
|
||||
void
|
||||
md5_hmac_update(struct md5_hmac_context *ctx, const byte *buf, size_t buflen)
|
||||
{
|
||||
/* Just update the inner digest */
|
||||
md5_update(&ctx->ictx, buf, buflen);
|
||||
}
|
||||
|
||||
byte *
|
||||
md5_hmac_final(struct md5_hmac_context *ctx)
|
||||
{
|
||||
/* Finish the inner digest */
|
||||
byte *isha = md5_final(&ctx->ictx);
|
||||
|
||||
/* Finish the outer digest */
|
||||
md5_update(&ctx->octx, isha, MD5_SIZE);
|
||||
return md5_final(&ctx->octx);
|
||||
}
|
||||
|
||||
55
lib/md5.h
55
lib/md5.h
@ -1,16 +1,47 @@
|
||||
#ifndef MD5_H
|
||||
#define MD5_H
|
||||
/*
|
||||
* BIRD Library -- MD5 Hash Function and HMAC-MD5 Function
|
||||
*
|
||||
* (c) 2015 CZ.NIC z.s.p.o.
|
||||
*
|
||||
* Adapted for BIRD by Martin Mares <mj@ucw.cz>
|
||||
*
|
||||
* Can be freely distributed and used under the terms of the GNU GPL.
|
||||
*/
|
||||
|
||||
struct MD5Context {
|
||||
u32 buf[4];
|
||||
u32 bits[2];
|
||||
unsigned char in[64];
|
||||
#ifndef _BIRD_MD5_H_
|
||||
#define _BIRD_MD5_H_
|
||||
|
||||
#include "nest/bird.h"
|
||||
|
||||
|
||||
#define MD5_SIZE 16
|
||||
#define MD5_HEX_SIZE 33
|
||||
#define MD5_BLOCK_SIZE 64
|
||||
|
||||
|
||||
struct md5_context {
|
||||
u32 buf[4];
|
||||
u32 bits[2];
|
||||
byte 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(u32 buf[4], u32 const in[16]);
|
||||
void md5_init(struct md5_context *ctx);
|
||||
void md5_update(struct md5_context *ctx, const byte *buf, uint len);
|
||||
byte *md5_final(struct md5_context *ctx);
|
||||
|
||||
#endif /* !MD5_H */
|
||||
|
||||
/*
|
||||
* HMAC-MD5
|
||||
*/
|
||||
|
||||
struct md5_hmac_context {
|
||||
struct md5_context ictx;
|
||||
struct md5_context octx;
|
||||
};
|
||||
|
||||
void md5_hmac_init(struct md5_hmac_context *ctx, const byte *key, size_t keylen);
|
||||
void md5_hmac_update(struct md5_hmac_context *ctx, const byte *buf, size_t buflen);
|
||||
byte *md5_hmac_final(struct md5_hmac_context *ctx);
|
||||
|
||||
|
||||
#endif /* _BIRD_MD5_H_ */
|
||||
|
||||
@ -11,6 +11,7 @@
|
||||
#include "ospf.h"
|
||||
#include "nest/password.h"
|
||||
#include "lib/md5.h"
|
||||
#include "lib/socket.h"
|
||||
|
||||
void
|
||||
ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
|
||||
@ -108,11 +109,11 @@ ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
|
||||
char password[OSPF_AUTH_CRYPT_SIZE];
|
||||
strncpy(password, passwd->password, sizeof(password));
|
||||
|
||||
struct MD5Context ctxt;
|
||||
MD5Init(&ctxt);
|
||||
MD5Update(&ctxt, (char *) pkt, plen);
|
||||
MD5Update(&ctxt, password, OSPF_AUTH_CRYPT_SIZE);
|
||||
MD5Final(tail, &ctxt);
|
||||
struct md5_context ctx;
|
||||
md5_init(&ctx);
|
||||
md5_update(&ctx, (char *) pkt, plen);
|
||||
md5_update(&ctx, password, OSPF_AUTH_CRYPT_SIZE);
|
||||
memcpy((byte *) tail, md5_final(&ctx), MD5_SIZE);
|
||||
break;
|
||||
|
||||
default:
|
||||
@ -174,19 +175,17 @@ ospf_pkt_checkauth(struct ospf_neighbor *n, struct ospf_iface *ifa, struct ospf_
|
||||
if (!pass)
|
||||
DROP("no suitable password found", auth->md5.keyid);
|
||||
|
||||
void *tail = ((void *) pkt) + plen;
|
||||
char passwd[OSPF_AUTH_CRYPT_SIZE];
|
||||
char md5sum[OSPF_AUTH_CRYPT_SIZE];
|
||||
byte *tail = ((byte *) pkt) + plen;
|
||||
char received[OSPF_AUTH_CRYPT_SIZE];
|
||||
memcpy(received, tail, OSPF_AUTH_CRYPT_SIZE);
|
||||
strncpy(tail, pass->password, OSPF_AUTH_CRYPT_SIZE);
|
||||
|
||||
strncpy(passwd, pass->password, OSPF_AUTH_CRYPT_SIZE);
|
||||
struct md5_context ctx;
|
||||
md5_init(&ctx);
|
||||
md5_update(&ctx, (byte *) pkt, plen + OSPF_AUTH_CRYPT_SIZE);
|
||||
char *computed = md5_final(&ctx);
|
||||
|
||||
struct MD5Context ctxt;
|
||||
MD5Init(&ctxt);
|
||||
MD5Update(&ctxt, (char *) pkt, plen);
|
||||
MD5Update(&ctxt, passwd, OSPF_AUTH_CRYPT_SIZE);
|
||||
MD5Final(md5sum, &ctxt);
|
||||
|
||||
if (memcmp(md5sum, tail, OSPF_AUTH_CRYPT_SIZE))
|
||||
if (memcmp(received, computed, OSPF_AUTH_CRYPT_SIZE))
|
||||
DROP("wrong MD5 digest", pass->id);
|
||||
|
||||
if (n)
|
||||
|
||||
@ -241,10 +241,10 @@ rip_fill_authentication(struct rip_proto *p, struct rip_iface *ifa, struct rip_p
|
||||
|
||||
*plen += sizeof(struct rip_auth_tail) + RIP_MD5_LENGTH;
|
||||
|
||||
struct MD5Context ctxt;
|
||||
MD5Init(&ctxt);
|
||||
MD5Update(&ctxt, (byte *) pkt, *plen);
|
||||
MD5Final(tail->auth_data, &ctxt);
|
||||
struct md5_context ctx;
|
||||
md5_init(&ctx);
|
||||
md5_update(&ctx, (byte *) pkt, *plen);
|
||||
memcpy(tail->auth_data, md5_final(&ctx), RIP_MD5_LENGTH);
|
||||
return;
|
||||
|
||||
default:
|
||||
@ -312,15 +312,13 @@ rip_check_authentication(struct rip_proto *p, struct rip_iface *ifa, struct rip_
|
||||
}
|
||||
|
||||
char received[RIP_MD5_LENGTH];
|
||||
char computed[RIP_MD5_LENGTH];
|
||||
|
||||
memcpy(received, tail->auth_data, RIP_MD5_LENGTH);
|
||||
strncpy(tail->auth_data, pass->password, RIP_MD5_LENGTH);
|
||||
|
||||
struct MD5Context ctxt;
|
||||
MD5Init(&ctxt);
|
||||
MD5Update(&ctxt, (byte *) pkt, *plen);
|
||||
MD5Final(computed, &ctxt);
|
||||
struct md5_context ctx;
|
||||
md5_init(&ctx);
|
||||
md5_update(&ctx, (byte *) pkt, *plen);
|
||||
char *computed = md5_final(&ctx);
|
||||
|
||||
if (memcmp(received, computed, RIP_MD5_LENGTH))
|
||||
DROP("wrong MD5 digest", pass->id);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user