*
* based on http://ubiqx.org/libcifs/source/Auth/MD5.c
* from Christopher R. Hertel (crh@ubiqx.mn.org)
- * Simplified, cleaned and IMO redundant comments removed by michael.
+ * Simplified, cleaned and IMO redundant comments removed by Michael.
*
* If you use gcc, then version 4.1 or later and -fomit-frame-pointer is
* strongly recommended.
*/
#include <stdint.h>
+
#include "bswap.h"
#include "intreadwrite.h"
+#include "mem.h"
#include "md5.h"
-typedef struct AVMD5{
+typedef struct AVMD5 {
uint64_t len;
uint8_t block[64];
uint32_t ABCD[4];
} AVMD5;
-const int av_md5_size= sizeof(AVMD5);
+struct AVMD5 *av_md5_alloc(void)
+{
+ return av_mallocz(sizeof(struct AVMD5));
+}
static const uint8_t S[4][4] = {
{ 7, 12, 17, 22 }, /* round 1 */
0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
};
-#define CORE(i, a, b, c, d) \
- t = S[i>>4][i&3];\
- a += T[i];\
-\
- if(i<32){\
- if(i<16) a += (d ^ (b&(c^d))) + X[ i &15 ];\
- else a += (c ^ (d&(c^b))) + X[ (1+5*i)&15 ];\
- }else{\
- if(i<48) a += (b^c^d) + X[ (5+3*i)&15 ];\
- else a += (c^(b|~d)) + X[ ( 7*i)&15 ];\
- }\
- a = b + (( a << t ) | ( a >> (32 - t) ));
-
-static void body(uint32_t ABCD[4], uint32_t X[16]){
-
+#define CORE(i, a, b, c, d) \
+ do { \
+ t = S[i >> 4][i & 3]; \
+ a += T[i]; \
+ \
+ if (i < 32) { \
+ if (i < 16) \
+ a += (d ^ (b & (c ^ d))) + X[i & 15]; \
+ else \
+ a += (c ^ (d & (c ^ b))) + X[(1 + 5 * i) & 15]; \
+ } else { \
+ if (i < 48) \
+ a += (b ^ c ^ d) + X[(5 + 3 * i) & 15]; \
+ else \
+ a += (c ^ (b | ~d)) + X[(7 * i) & 15]; \
+ } \
+ a = b + (a << t | a >> (32 - t)); \
+ } while (0)
+
+static void body(uint32_t ABCD[4], uint32_t X[16])
+{
int t;
int i av_unused;
- unsigned int a= ABCD[3];
- unsigned int b= ABCD[2];
- unsigned int c= ABCD[1];
- unsigned int d= ABCD[0];
+ unsigned int a = ABCD[3];
+ unsigned int b = ABCD[2];
+ unsigned int c = ABCD[1];
+ unsigned int d = ABCD[0];
#if HAVE_BIGENDIAN
- for(i=0; i<16; i++)
- X[i]= av_bswap32(X[i]);
+ for (i = 0; i < 16; i++)
+ X[i] = av_bswap32(X[i]);
#endif
#if CONFIG_SMALL
- for( i = 0; i < 64; i++ ){
- CORE(i,a,b,c,d)
- t=d; d=c; c=b; b=a; a=t;
+ for (i = 0; i < 64; i++) {
+ CORE(i, a, b, c, d);
+ t = d;
+ d = c;
+ c = b;
+ b = a;
+ a = t;
}
#else
-#define CORE2(i) CORE(i,a,b,c,d) CORE((i+1),d,a,b,c) CORE((i+2),c,d,a,b) CORE((i+3),b,c,d,a)
-#define CORE4(i) CORE2(i) CORE2((i+4)) CORE2((i+8)) CORE2((i+12))
-CORE4(0) CORE4(16) CORE4(32) CORE4(48)
+#define CORE2(i) \
+ CORE(i, a, b, c, d); CORE((i + 1), d, a, b, c); \
+ CORE((i + 2), c, d, a, b); CORE((i + 3), b, c, d, a)
+#define CORE4(i) CORE2(i); CORE2((i + 4)); CORE2((i + 8)); CORE2((i + 12))
+ CORE4(0);
+ CORE4(16);
+ CORE4(32);
+ CORE4(48);
#endif
ABCD[0] += d;
ABCD[3] += a;
}
-void av_md5_init(AVMD5 *ctx){
- ctx->len = 0;
+void av_md5_init(AVMD5 *ctx)
+{
+ ctx->len = 0;
ctx->ABCD[0] = 0x10325476;
ctx->ABCD[1] = 0x98badcfe;
ctx->ABCD[3] = 0x67452301;
}
-void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len){
+#if FF_API_CRYPTO_SIZE_T
+void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len)
+#else
+void av_md5_update(AVMD5 *ctx, const uint8_t *src, size_t len)
+#endif
+{
int i, j;
- j= ctx->len & 63;
+ j = ctx->len & 63;
ctx->len += len;
- for( i = 0; i < len; i++ ){
+ for (i = 0; i < len; i++) {
ctx->block[j++] = src[i];
- if( 64 == j ){
- body(ctx->ABCD, (uint32_t*) ctx->block);
+ if (j == 64) {
+ body(ctx->ABCD, (uint32_t *) ctx->block);
j = 0;
}
}
}
-void av_md5_final(AVMD5 *ctx, uint8_t *dst){
+void av_md5_final(AVMD5 *ctx, uint8_t *dst)
+{
int i;
- uint64_t finalcount= av_le2ne64(ctx->len<<3);
+ uint64_t finalcount = av_le2ne64(ctx->len << 3);
av_md5_update(ctx, "\200", 1);
- while((ctx->len & 63)!=56)
+ while ((ctx->len & 63) != 56)
av_md5_update(ctx, "", 1);
- av_md5_update(ctx, (uint8_t*)&finalcount, 8);
-
- for(i=0; i<4; i++)
- AV_WL32(dst + 4*i, ctx->ABCD[3-i]);
-}
-
-void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len){
- AVMD5 ctx[1];
+ av_md5_update(ctx, (uint8_t *) &finalcount, 8);
- av_md5_init(ctx);
- av_md5_update(ctx, src, len);
- av_md5_final(ctx, dst);
+ for (i = 0; i < 4; i++)
+ AV_WL32(dst + 4 * i, ctx->ABCD[3 - i]);
}
-#ifdef TEST
-#undef printf
-#include <stdio.h>
-
-static void print_md5(uint8_t *md5)
+#if FF_API_CRYPTO_SIZE_T
+void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len)
+#else
+void av_md5_sum(uint8_t *dst, const uint8_t *src, size_t len)
+#endif
{
- int i;
- for (i = 0; i < 16; i++)
- printf("%02x", md5[i]);
- printf("\n");
-}
-
-int main(void){
- uint8_t md5val[16];
- int i;
- uint8_t in[1000];
-
- for(i=0; i<1000; i++) in[i]= i*i;
- av_md5_sum(md5val, in, 1000); print_md5(md5val);
- av_md5_sum(md5val, in, 63); print_md5(md5val);
- av_md5_sum(md5val, in, 64); print_md5(md5val);
- av_md5_sum(md5val, in, 65); print_md5(md5val);
- for(i=0; i<1000; i++) in[i]= i % 127;
- av_md5_sum(md5val, in, 999); print_md5(md5val);
+ AVMD5 ctx;
- return 0;
+ av_md5_init(&ctx);
+ av_md5_update(&ctx, src, len);
+ av_md5_final(&ctx, dst);
}
-#endif
projects / ffmpeg / blobdiff