Engage AES for UltraSPARC in sparcv9 targets.
[openssl.git] / crypto / aes / aes_cbc.c
index 964a978..d2ba6bc 100644 (file)
@@ -1,6 +1,6 @@
 /* crypto/aes/aes_cbc.c -*- mode:C; c-file-style: "eay" -*- */
 /* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  *
  */
 
+#ifndef AES_DEBUG
+# ifndef NDEBUG
+#  define NDEBUG
+# endif
+#endif
 #include <assert.h>
+
 #include <openssl/aes.h>
 #include "aes_locl.h"
 
@@ -57,33 +63,69 @@ void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
                     const unsigned long length, const AES_KEY *key,
                     unsigned char *ivec, const int enc) {
 
-       int n;
+       unsigned long n;
        unsigned long len = length;
-       unsigned char tmp[16];
+       unsigned char tmp[AES_BLOCK_SIZE];
+       const unsigned char *iv = ivec;
 
        assert(in && out && key && ivec);
-       assert(length % AES_BLOCK_SIZE == 0);
        assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
 
-       if (AES_ENCRYPT == enc)
-               while (len > 0) {
-                       for(n=0; n < 16; ++n)
-                               tmp[n] = in[n] ^ ivec[n];
-                       AES_encrypt(tmp, out, key);
-                       memcpy(ivec, out, 16);
-                       len -= 16;
-                       in += 16;
-                       out += 16;
+       if (AES_ENCRYPT == enc) {
+               while (len >= AES_BLOCK_SIZE) {
+                       for(n=0; n < AES_BLOCK_SIZE; ++n)
+                               out[n] = in[n] ^ iv[n];
+                       AES_encrypt(out, out, key);
+                       iv = out;
+                       len -= AES_BLOCK_SIZE;
+                       in += AES_BLOCK_SIZE;
+                       out += AES_BLOCK_SIZE;
+               }
+               if (len) {
+                       for(n=0; n < len; ++n)
+                               out[n] = in[n] ^ iv[n];
+                       for(n=len; n < AES_BLOCK_SIZE; ++n)
+                               out[n] = iv[n];
+                       AES_encrypt(out, out, key);
+                       iv = out;
                }
-       else
-               while (len > 0) {
-                       memcpy(tmp, in, 16);
+               memcpy(ivec,iv,AES_BLOCK_SIZE);
+       } else if (in != out) {
+               while (len >= AES_BLOCK_SIZE) {
                        AES_decrypt(in, out, key);
-                       for(n=0; n < 16; ++n)
+                       for(n=0; n < AES_BLOCK_SIZE; ++n)
+                               out[n] ^= iv[n];
+                       iv = in;
+                       len -= AES_BLOCK_SIZE;
+                       in  += AES_BLOCK_SIZE;
+                       out += AES_BLOCK_SIZE;
+               }
+               if (len) {
+                       AES_decrypt(in,tmp,key);
+                       for(n=0; n < len; ++n)
+                               out[n] = tmp[n] ^ iv[n];
+                       iv = in;
+               }
+               memcpy(ivec,iv,AES_BLOCK_SIZE);
+       } else {
+               while (len >= AES_BLOCK_SIZE) {
+                       memcpy(tmp, in, AES_BLOCK_SIZE);
+                       AES_decrypt(in, out, key);
+                       for(n=0; n < AES_BLOCK_SIZE; ++n)
+                               out[n] ^= ivec[n];
+                       memcpy(ivec, tmp, AES_BLOCK_SIZE);
+                       len -= AES_BLOCK_SIZE;
+                       in += AES_BLOCK_SIZE;
+                       out += AES_BLOCK_SIZE;
+               }
+               if (len) {
+                       memcpy(tmp, in, AES_BLOCK_SIZE);
+                       AES_decrypt(tmp, out, key);
+                       for(n=0; n < len; ++n)
                                out[n] ^= ivec[n];
-                       memcpy(ivec, tmp, 16);
-                       len -= 16;
-                       in += 16;
-                       out += 16;
+                       for(n=len; n < AES_BLOCK_SIZE; ++n)
+                               out[n] = tmp[n];
+                       memcpy(ivec, tmp, AES_BLOCK_SIZE);
                }
+       }
 }