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https://gitlab.xiph.org/xiph/icecast-server.git
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Cleanup: Replaced the MD5 code with librhash
This cleanup removes our own implementation of MD5. librhash is a hard dependency of libigloo which we also hard depend on. So it is safe to assume it is always there. More cleanup should be done once support for more algos for htpasswd has been implemented.
This commit is contained in:
Philipp Schafft
parent
9b758ca65c
commit
f1c32d7bf4
@ -62,6 +62,8 @@
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#include <pwd.h>
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#endif
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#include <rhash.h>
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#include "main.h"
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#include "cfgfile.h"
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#include "util.h"
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@ -604,6 +606,11 @@ int main(int argc, char **argv)
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return 1;
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}
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/* likely libigloo already did this for us, however how should we know?
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* Still/Only required for htpasswd MD5 support.
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*/
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rhash_library_init();
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/* parse the '-c icecast.xml' option
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** only, so that we can read a configfile
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*/
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225
src/md5.c
225
src/md5.c
@ -44,237 +44,22 @@
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#include <string.h>
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#include <ctype.h>
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static void MD5Transform(uint32_t buf[4], uint32_t const in[HASH_LEN]);
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/* The following are proxy functions. This will be removed once more updates have been done */
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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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static void byteReverse(unsigned char *buf, unsigned longs)
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{
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uint32_t t;
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do
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{
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t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
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((unsigned) buf[1] << 8 | buf[0]);
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*(uint32_t *) buf = t;
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buf += 4;
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}
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while (--longs);
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}
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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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{
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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->rhash = rhash_init(RHASH_MD5);
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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,
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unsigned len)
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{
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uint32_t t;
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/* Update bitcount */
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t = ctx->bits[0];
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if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
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ctx->bits[1]++;
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/* Carry from low to high */
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ctx->bits[1] += len >> 29;
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t = (t >> 3) & 0x3f;
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/* Bytes already in shsInfo->data */
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/* Handle any leading odd-sized chunks */
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if (t)
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{
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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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{
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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, HASH_LEN);
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MD5Transform(ctx->buf, (uint32_t *) ctx->in);
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buf += t;
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len -= t;
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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, HASH_LEN);
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MD5Transform(ctx->buf, (uint32_t *) 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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rhash_update(ctx->rhash, 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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* 1 0* (64-bit count of bits processed, MSB-first)
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*/
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void MD5Final(unsigned char digest[HASH_LEN], struct MD5Context *ctx)
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{
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unsigned count;
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unsigned char *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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/* 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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/* 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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{
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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, HASH_LEN);
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MD5Transform(ctx->buf, (uint32_t *) 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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}
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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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((uint32_t *) ctx->in)[14] = ctx->bits[0];
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((uint32_t *) ctx->in)[15] = ctx->bits[1];
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MD5Transform(ctx->buf, (uint32_t *) ctx->in);
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byteReverse((unsigned char *) ctx->buf, 4);
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memcpy(digest, ctx->buf, HASH_LEN);
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rhash_final(ctx->rhash, digest);
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rhash_free(ctx->rhash);
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memset(ctx, 0, sizeof(*ctx));
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/* 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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/* #define F1(x, y, z) (x & y | ~x & z) */
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# define F1(x, y, z) (z ^ (x & (y ^ z)))
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# define F2(x, y, z) F1(z, x, y)
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# define F3(x, y, z) (x ^ y ^ z)
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# define F4(x, y, z) (y ^ (x | ~z))
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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) do { w += f(x, y, z) + data; w = (w<<s) | (w>>(32-s)); w += x; }while(0)
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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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static void MD5Transform(uint32_t buf[4], uint32_t const in[HASH_LEN])
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{
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register uint32_t 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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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(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);
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MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
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MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
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MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
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MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
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MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
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MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
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MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
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MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
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MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
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MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
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MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
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MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
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MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
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MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
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MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
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MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
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MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
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buf[0] += a;
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buf[1] += b;
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buf[2] += c;
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buf[3] += d;
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}
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@ -15,13 +15,12 @@
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#include "compat.h"
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#include <rhash.h>
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#define HASH_LEN 16
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struct MD5Context
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{
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uint32_t buf[4];
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uint32_t bits[2];
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unsigned char in[64];
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struct MD5Context {
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rhash rhash;
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};
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void MD5Init(struct MD5Context *context);
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@ -13,6 +13,8 @@
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#include <stdlib.h>
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#include <string.h>
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#include <rhash.h>
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#include <igloo/tap.h>
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#include "../md5.h"
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@ -70,6 +72,9 @@ int main (void)
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{
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igloo_tap_init();
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igloo_tap_exit_on(igloo_TAP_EXIT_ON_FIN, NULL);
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rhash_library_init();
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igloo_tap_group_run("md5 vectors", test_md5);
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igloo_tap_fin();
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