1 files changed, 59 insertions, 8 deletions

diff --git a/plugins/MirOTR/Libgcrypt/cipher/hash-common.c b/plugins/MirOTR/Libgcrypt/cipher/hash-common.c
index 656e180e2d..ffbc39ed2b 100644
--- a/plugins/MirOTR/Libgcrypt/cipher/hash-common.c
+++ b/plugins/MirOTR/Libgcrypt/cipher/hash-common.c
@@ -21,7 +21,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#ifdef HAVE_STDINT_H 
+#ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 
@@ -35,10 +35,10 @@
    describing the error.
 
    DATAMODE controls what will be hashed according to this table:
-   
+
      0 - Hash the supplied DATA of DATALEN.
      1 - Hash one million times a 'a'.  DATA and DATALEN are ignored.
-   
+
 */
 const char *
 _gcry_hash_selftest_check_one (int algo,
@@ -49,14 +49,14 @@ _gcry_hash_selftest_check_one (int algo,
   gcry_error_t err = 0;
   gcry_md_hd_t hd;
   unsigned char *digest;
-  
+
   if (_gcry_md_get_algo_dlen (algo) != expectlen)
     return "digest size does not match expected size";
-    
+
   err = _gcry_md_open (&hd, algo, 0);
   if (err)
     return "gcry_md_open failed";
-  
+
   switch (datamode)
     {
     case 0:
@@ -64,7 +64,7 @@ _gcry_hash_selftest_check_one (int algo,
       break;
 
     case 1: /* Hash one million times an "a". */
-      {		
+      {
         char aaa[1000];
         int i;
 
@@ -82,7 +82,7 @@ _gcry_hash_selftest_check_one (int algo,
   if (!result)
     {
       digest = _gcry_md_read (hd, algo);
-      
+
       if ( memcmp (digest, expect, expectlen) )
         result = "digest mismatch";
     }
@@ -92,3 +92,54 @@ _gcry_hash_selftest_check_one (int algo,
   return result;
 }
 
+
+/* Common function to write a chunk of data to the transform function
+   of a hash algorithm.  Note that the use of the term "block" does
+   not imply a fixed size block.  */
+void
+_gcry_md_block_write (void *context, const void *inbuf_arg, size_t inlen)
+{
+  const unsigned char *inbuf = inbuf_arg;
+  gcry_md_block_ctx_t *hd = context;
+  unsigned int stack_burn = 0;
+
+  if (sizeof(hd->buf) < hd->blocksize)
+    BUG();
+
+  if (hd->buf == NULL || hd->bwrite == NULL)
+    return;
+
+  if (hd->count == hd->blocksize)  /* Flush the buffer. */
+    {
+      stack_burn = hd->bwrite (hd, hd->buf);
+      _gcry_burn_stack (stack_burn);
+      stack_burn = 0;
+      hd->count = 0;
+      if (!++hd->nblocks)
+        hd->nblocks_high++;
+    }
+  if (!inbuf)
+    return;
+
+  if (hd->count)
+    {
+      for (; inlen && hd->count < hd->blocksize; inlen--)
+        hd->buf[hd->count++] = *inbuf++;
+      _gcry_md_block_write (hd, NULL, 0);
+      if (!inlen)
+        return;
+    }
+
+  while (inlen >= hd->blocksize)
+    {
+      stack_burn = hd->bwrite (hd, inbuf);
+      hd->count = 0;
+      if (!++hd->nblocks)
+        hd->nblocks_high++;
+      inlen -= hd->blocksize;
+      inbuf += hd->blocksize;
+    }
+  _gcry_burn_stack (stack_burn);
+  for (; inlen && hd->count < hd->blocksize; inlen--)
+    hd->buf[hd->count++] = *inbuf++;
+}