1 files changed, 63 insertions, 40 deletions

diff --git a/libavutil/md5.c b/libavutil/md5.c
index efb993e..63fc37d 100644
--- a/libavutil/md5.c
+++ b/libavutil/md5.c
@@ -13,20 +13,20 @@
  * If you use gcc, then version 4.1 or later and -fomit-frame-pointer is
  * strongly recommended.
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -42,9 +42,7 @@ typedef struct AVMD5{
     uint32_t ABCD[4];
 } AVMD5;
 
-#if FF_API_CONTEXT_SIZE
 const int av_md5_size = sizeof(AVMD5);
-#endif
 
 struct AVMD5 *av_md5_alloc(void)
 {
@@ -85,50 +83,56 @@ static const uint32_t T[64] = { // T[i]= fabs(sin(i+1)<<32)
         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];   \
+            if (i < 16) a += (d ^ (b & (c ^ d)))  + X[       i  & 15];  \
+            else        a += ((d & b) | (~d & c)) + 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];   \
+            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])
+static void body(uint32_t ABCD[4], uint32_t *src, int nblocks)
 {
-    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];
+    int n;
+    uint32_t a, b, c, d, t, *X;
+
+    for (n = 0; n < nblocks; n++) {
+        a = ABCD[3];
+        b = ABCD[2];
+        c = ABCD[1];
+        d = ABCD[0];
+
+        X = src + n * 16;
 
 #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)
+        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);
+        CORE4(0); CORE4(16); CORE4(32); CORE4(48);
 #endif
 
-    ABCD[0] += d;
-    ABCD[1] += c;
-    ABCD[2] += b;
-    ABCD[3] += a;
+        ABCD[0] += d;
+        ABCD[1] += c;
+        ABCD[2] += b;
+        ABCD[3] += a;
+    }
 }
 
 void av_md5_init(AVMD5 *ctx)
@@ -141,20 +145,39 @@ void av_md5_init(AVMD5 *ctx)
     ctx->ABCD[3] = 0x67452301;
 }
 
-void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len)
+void av_md5_update(AVMD5 *ctx, const uint8_t *src, int len)
 {
-    int i, j;
+    const uint8_t *end;
+    int j;
 
     j = ctx->len & 63;
     ctx->len += len;
 
-    for (i = 0; i < len; i++) {
-        ctx->block[j++] = src[i];
-        if (j == 64) {
-            body(ctx->ABCD, (uint32_t *) ctx->block);
-            j = 0;
+    if (j) {
+        int cnt = FFMIN(len, 64 - j);
+        memcpy(ctx->block + j, src, cnt);
+        src += cnt;
+        len -= cnt;
+        if (j + cnt < 64)
+            return;
+        body(ctx->ABCD, (uint32_t *)ctx->block, 1);
+    }
+
+    end = src + (len & ~63);
+    if (HAVE_BIGENDIAN || (!HAVE_FAST_UNALIGNED && ((intptr_t)src & 3))) {
+       while (src < end) {
+           memcpy(ctx->block, src, 64);
+           body(ctx->ABCD, (uint32_t *) ctx->block, 1);
+           src += 64;
         }
+    } else {
+        int nblocks = len / 64;
+        body(ctx->ABCD, (uint32_t *)src, nblocks);
+        src = end;
     }
+    len &= 63;
+    if (len > 0)
+        memcpy(ctx->block, src, len);
 }
 
 void av_md5_final(AVMD5 *ctx, uint8_t *dst)