File libgcrypt-fipsdrv-enable-algo-for-dsa-sign.patch of Package libgcrypt.13597

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File libgcrypt-fipsdrv-enable-algo-for-dsa-sign.patch of Package libgcrypt.13597

Index: libgcrypt-1.6.1/tests/fipsdrv.c
===================================================================
--- libgcrypt-1.6.1.orig/tests/fipsdrv.c
+++ libgcrypt-1.6.1/tests/fipsdrv.c
@@ -2190,11 +2190,12 @@ dsa_hash_from_key(gcry_sexp_t s_key)
   return GCRY_MD_NONE;
 }
 
-
+
 /* Sign DATA of length DATALEN using the key taken from the S-expression
    encoded KEYFILE. */
 static void
-run_dsa_sign (const void *data, size_t datalen, const char *keyfile)
+run_dsa_sign (const void *data, size_t datalen,
+	      int hashalgo, const char *keyfile)
 
 {
   gpg_error_t err;
@@ -2202,13 +2203,20 @@ run_dsa_sign (const void *data, size_t d
   char hash[128];
   gcry_mpi_t tmpmpi;
   int algo;
+  int algo_len;
+  int hashalgo_len;
 
   s_key = read_sexp_from_file (keyfile);
   algo = dsa_hash_from_key(s_key);
+  algo_len = gcry_md_get_algo_dlen(algo);
+  hashalgo_len = gcry_md_get_algo_dlen(hashalgo);
 
-  gcry_md_hash_buffer (algo, hash, data, datalen);
+  if (hashalgo_len < algo_len)
+  algo_len = hashalgo_len;
+
+  gcry_md_hash_buffer (hashalgo, hash, data, datalen);
   err = gcry_mpi_scan (&tmpmpi, GCRYMPI_FMT_USG, hash,
-                       gcry_md_get_algo_dlen(algo), NULL);
+                       algo_len, NULL);
   if (!err)
     {
       err = gcry_sexp_build (&s_data, NULL,
@@ -3000,14 +3008,21 @@ main (int argc, char **argv)
     }
   else if (!strcmp (mode_string, "dsa-sign"))
     {
+      int algo;
+
       if (!key_string)
         die ("option --key is required in this mode\n");
       if (access (key_string, R_OK))
         die ("option --key needs to specify an existing keyfile\n");
+      if (!algo_string)
+        die ("option --algo is required in this mode\n");
+      algo = gcry_md_map_name (algo_string);
+      if (!algo)
+        die ("digest algorithm `%s' is not supported\n", algo_string); 
       if (!data)
         die ("no data available (do not use --chunk)\n");
 
-      run_dsa_sign (data, datalen, key_string);
+      run_dsa_sign (data, datalen, algo, key_string);
     }
   else if (!strcmp (mode_string, "dsa-verify"))
     {

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File libgcrypt-fipsdrv-enable-algo-for-dsa-sign.patch of Package libgcrypt.13597

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