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-rw-r--r--lib/md5.c185
1 files changed, 106 insertions, 79 deletions
diff --git a/lib/md5.c b/lib/md5.c
index 08c298a2..3c39eccd 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -25,7 +25,7 @@
#include <string.h> /* for memcpy() */
#include "md5.h"
-static void md5_transform(u_int32_t buf[4], u_int32_t const in[16]);
+static void md5_transform(uint32_t buf[4], uint32_t const in[16]);
/*
* Wrapper function for all-in-one MD5
@@ -34,6 +34,29 @@ static void md5_transform(u_int32_t buf[4], u_int32_t const in[16]);
* 20021120
*/
+/* Turns out MD5 was designed for little-endian machines. If we're running
+ on a big-endian machines, we have to swap some bytes. Since detecting
+ endianness at compile time reliably seems pretty hard, let's do it at
+ run-time. It's not like we're going to checksum megabytes of data... */
+static uint32_t cvt32(uint32_t val)
+{
+ static int little_endian = -1;
+
+ if (little_endian == -1)
+ {
+ little_endian = 1;
+ little_endian = *((char*) &little_endian);
+ }
+
+ if (little_endian)
+ return val;
+ else
+ return (val >> 24) |
+ ((val >> 8) & 0xff00) |
+ ((val << 8) & 0xff0000) |
+ (val << 24);
+}
+
void md5_init(struct MD5Context *ctx)
{
ctx->buf[0] = 0x67452301;
@@ -52,12 +75,12 @@ void md5_init(struct MD5Context *ctx)
void md5_append(struct MD5Context *ctx, const md5_byte_t *buf,
unsigned int len)
{
- u_int32_t t;
+ uint32_t t;
/* Update bitcount */
t = ctx->bits[0];
- if ((ctx->bits[0] = t + ((u_int32_t) len << 3)) < t)
+ if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
ctx->bits[1]++; /* Carry from low to high */
ctx->bits[1] += len >> 29;
@@ -74,7 +97,7 @@ void md5_append(struct MD5Context *ctx, const md5_byte_t *buf,
return;
}
memcpy(p, buf, t);
- md5_transform(ctx->buf, (u_int32_t *) ctx->in);
+ md5_transform(ctx->buf, (uint32_t *) ctx->in);
buf += t;
len -= t;
}
@@ -82,7 +105,7 @@ void md5_append(struct MD5Context *ctx, const md5_byte_t *buf,
while (len >= 64) {
memcpy(ctx->in, buf, 64);
- md5_transform(ctx->buf, (u_int32_t *) ctx->in);
+ md5_transform(ctx->buf, (uint32_t *) ctx->in);
buf += 64;
len -= 64;
}
@@ -116,7 +139,7 @@ void md5_finish(struct MD5Context *ctx, md5_byte_t digest[16])
if (count < 8) {
/* Two lots of padding: Pad the first block to 64 bytes */
memset(p, 0, count);
- md5_transform(ctx->buf, (u_int32_t *) ctx->in);
+ md5_transform(ctx->buf, (uint32_t *) ctx->in);
/* Now fill the next block with 56 bytes */
memset(ctx->in, 0, 56);
@@ -126,10 +149,14 @@ void md5_finish(struct MD5Context *ctx, md5_byte_t digest[16])
}
/* Append length in bits and transform */
- ((u_int32_t *) ctx->in)[14] = ctx->bits[0];
- ((u_int32_t *) ctx->in)[15] = ctx->bits[1];
-
- md5_transform(ctx->buf, (u_int32_t *) ctx->in);
+ ((uint32_t *) ctx->in)[14] = cvt32(ctx->bits[0]);
+ ((uint32_t *) ctx->in)[15] = cvt32(ctx->bits[1]);
+
+ md5_transform(ctx->buf, (uint32_t *) ctx->in);
+ ctx->buf[0] = cvt32(ctx->buf[0]);
+ ctx->buf[1] = cvt32(ctx->buf[1]);
+ ctx->buf[2] = cvt32(ctx->buf[2]);
+ ctx->buf[3] = cvt32(ctx->buf[3]);
memcpy(digest, ctx->buf, 16);
memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
}
@@ -151,82 +178,82 @@ void md5_finish(struct MD5Context *ctx, md5_byte_t digest[16])
* reflect the addition of 16 longwords of new data. MD5Update blocks
* the data and converts bytes into longwords for this routine.
*/
-static void md5_transform(u_int32_t buf[4], u_int32_t const in[16])
+static void md5_transform(uint32_t buf[4], uint32_t const in[16])
{
- register u_int32_t a, b, c, d;
+ register uint32_t 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);
+ MD5STEP(F1, a, b, c, d, cvt32(in[0]) + 0xd76aa478, 7);
+ MD5STEP(F1, d, a, b, c, cvt32(in[1]) + 0xe8c7b756, 12);
+ MD5STEP(F1, c, d, a, b, cvt32(in[2]) + 0x242070db, 17);
+ MD5STEP(F1, b, c, d, a, cvt32(in[3]) + 0xc1bdceee, 22);
+ MD5STEP(F1, a, b, c, d, cvt32(in[4]) + 0xf57c0faf, 7);
+ MD5STEP(F1, d, a, b, c, cvt32(in[5]) + 0x4787c62a, 12);
+ MD5STEP(F1, c, d, a, b, cvt32(in[6]) + 0xa8304613, 17);
+ MD5STEP(F1, b, c, d, a, cvt32(in[7]) + 0xfd469501, 22);
+ MD5STEP(F1, a, b, c, d, cvt32(in[8]) + 0x698098d8, 7);
+ MD5STEP(F1, d, a, b, c, cvt32(in[9]) + 0x8b44f7af, 12);
+ MD5STEP(F1, c, d, a, b, cvt32(in[10]) + 0xffff5bb1, 17);
+ MD5STEP(F1, b, c, d, a, cvt32(in[11]) + 0x895cd7be, 22);
+ MD5STEP(F1, a, b, c, d, cvt32(in[12]) + 0x6b901122, 7);
+ MD5STEP(F1, d, a, b, c, cvt32(in[13]) + 0xfd987193, 12);
+ MD5STEP(F1, c, d, a, b, cvt32(in[14]) + 0xa679438e, 17);
+ MD5STEP(F1, b, c, d, a, cvt32(in[15]) + 0x49b40821, 22);
+
+ MD5STEP(F2, a, b, c, d, cvt32(in[1]) + 0xf61e2562, 5);
+ MD5STEP(F2, d, a, b, c, cvt32(in[6]) + 0xc040b340, 9);
+ MD5STEP(F2, c, d, a, b, cvt32(in[11]) + 0x265e5a51, 14);
+ MD5STEP(F2, b, c, d, a, cvt32(in[0]) + 0xe9b6c7aa, 20);
+ MD5STEP(F2, a, b, c, d, cvt32(in[5]) + 0xd62f105d, 5);
+ MD5STEP(F2, d, a, b, c, cvt32(in[10]) + 0x02441453, 9);
+ MD5STEP(F2, c, d, a, b, cvt32(in[15]) + 0xd8a1e681, 14);
+ MD5STEP(F2, b, c, d, a, cvt32(in[4]) + 0xe7d3fbc8, 20);
+ MD5STEP(F2, a, b, c, d, cvt32(in[9]) + 0x21e1cde6, 5);
+ MD5STEP(F2, d, a, b, c, cvt32(in[14]) + 0xc33707d6, 9);
+ MD5STEP(F2, c, d, a, b, cvt32(in[3]) + 0xf4d50d87, 14);
+ MD5STEP(F2, b, c, d, a, cvt32(in[8]) + 0x455a14ed, 20);
+ MD5STEP(F2, a, b, c, d, cvt32(in[13]) + 0xa9e3e905, 5);
+ MD5STEP(F2, d, a, b, c, cvt32(in[2]) + 0xfcefa3f8, 9);
+ MD5STEP(F2, c, d, a, b, cvt32(in[7]) + 0x676f02d9, 14);
+ MD5STEP(F2, b, c, d, a, cvt32(in[12]) + 0x8d2a4c8a, 20);
+
+ MD5STEP(F3, a, b, c, d, cvt32(in[5]) + 0xfffa3942, 4);
+ MD5STEP(F3, d, a, b, c, cvt32(in[8]) + 0x8771f681, 11);
+ MD5STEP(F3, c, d, a, b, cvt32(in[11]) + 0x6d9d6122, 16);
+ MD5STEP(F3, b, c, d, a, cvt32(in[14]) + 0xfde5380c, 23);
+ MD5STEP(F3, a, b, c, d, cvt32(in[1]) + 0xa4beea44, 4);
+ MD5STEP(F3, d, a, b, c, cvt32(in[4]) + 0x4bdecfa9, 11);
+ MD5STEP(F3, c, d, a, b, cvt32(in[7]) + 0xf6bb4b60, 16);
+ MD5STEP(F3, b, c, d, a, cvt32(in[10]) + 0xbebfbc70, 23);
+ MD5STEP(F3, a, b, c, d, cvt32(in[13]) + 0x289b7ec6, 4);
+ MD5STEP(F3, d, a, b, c, cvt32(in[0]) + 0xeaa127fa, 11);
+ MD5STEP(F3, c, d, a, b, cvt32(in[3]) + 0xd4ef3085, 16);
+ MD5STEP(F3, b, c, d, a, cvt32(in[6]) + 0x04881d05, 23);
+ MD5STEP(F3, a, b, c, d, cvt32(in[9]) + 0xd9d4d039, 4);
+ MD5STEP(F3, d, a, b, c, cvt32(in[12]) + 0xe6db99e5, 11);
+ MD5STEP(F3, c, d, a, b, cvt32(in[15]) + 0x1fa27cf8, 16);
+ MD5STEP(F3, b, c, d, a, cvt32(in[2]) + 0xc4ac5665, 23);
+
+ MD5STEP(F4, a, b, c, d, cvt32(in[0]) + 0xf4292244, 6);
+ MD5STEP(F4, d, a, b, c, cvt32(in[7]) + 0x432aff97, 10);
+ MD5STEP(F4, c, d, a, b, cvt32(in[14]) + 0xab9423a7, 15);
+ MD5STEP(F4, b, c, d, a, cvt32(in[5]) + 0xfc93a039, 21);
+ MD5STEP(F4, a, b, c, d, cvt32(in[12]) + 0x655b59c3, 6);
+ MD5STEP(F4, d, a, b, c, cvt32(in[3]) + 0x8f0ccc92, 10);
+ MD5STEP(F4, c, d, a, b, cvt32(in[10]) + 0xffeff47d, 15);
+ MD5STEP(F4, b, c, d, a, cvt32(in[1]) + 0x85845dd1, 21);
+ MD5STEP(F4, a, b, c, d, cvt32(in[8]) + 0x6fa87e4f, 6);
+ MD5STEP(F4, d, a, b, c, cvt32(in[15]) + 0xfe2ce6e0, 10);
+ MD5STEP(F4, c, d, a, b, cvt32(in[6]) + 0xa3014314, 15);
+ MD5STEP(F4, b, c, d, a, cvt32(in[13]) + 0x4e0811a1, 21);
+ MD5STEP(F4, a, b, c, d, cvt32(in[4]) + 0xf7537e82, 6);
+ MD5STEP(F4, d, a, b, c, cvt32(in[11]) + 0xbd3af235, 10);
+ MD5STEP(F4, c, d, a, b, cvt32(in[2]) + 0x2ad7d2bb, 15);
+ MD5STEP(F4, b, c, d, a, cvt32(in[9]) + 0xeb86d391, 21);
buf[0] += a;
buf[1] += b;
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-27 08:36:54 +0000