--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/testprof/modes_test.c	Wed Mar 08 13:23:58 2006 +0000
@@ -0,0 +1,120 @@
+/* test CFB/OFB/CBC modes */
+#include <tomcrypt_test.h>
+
+int modes_test(void)
+{
+   unsigned char pt[64], ct[64], tmp[64], key[16], iv[16], iv2[16];
+   int cipher_idx;
+   symmetric_CBC cbc;
+   symmetric_CFB cfb;
+   symmetric_OFB ofb;
+   symmetric_CTR ctr;
+   unsigned long l;
+   
+   /* make a random pt, key and iv */
+   yarrow_read(pt,  64, &yarrow_prng);
+   yarrow_read(key, 16, &yarrow_prng);
+   yarrow_read(iv,  16, &yarrow_prng);
+   
+   /* get idx of AES handy */
+   cipher_idx = find_cipher("aes");
+   if (cipher_idx == -1) {
+      fprintf(stderr, "test requires AES");
+      return 1;
+   }
+   
+#ifdef CBC
+   /* test CBC mode */
+   /* encode the block */
+   DO(cbc_start(cipher_idx, iv, key, 16, 0, &cbc));
+   l = sizeof(iv2);
+   DO(cbc_getiv(iv2, &l, &cbc));
+   if (l != 16 || memcmp(iv2, iv, 16)) {
+      fprintf(stderr, "cbc_getiv failed");
+      return 1;
+   }
+   DO(cbc_encrypt(pt, ct, 64, &cbc));
+   
+   /* decode the block */
+   DO(cbc_setiv(iv2, l, &cbc));
+   zeromem(tmp, sizeof(tmp));
+   DO(cbc_decrypt(ct, tmp, 64, &cbc));
+   if (memcmp(tmp, pt, 64) != 0) {
+      fprintf(stderr, "CBC failed");
+      return 1;
+   }
+#endif
+
+#ifdef CFB   
+   /* test CFB mode */
+   /* encode the block */
+   DO(cfb_start(cipher_idx, iv, key, 16, 0, &cfb));
+   l = sizeof(iv2);
+   DO(cfb_getiv(iv2, &l, &cfb));
+   /* note we don't memcmp iv2/iv since cfb_start processes the IV for the first block */
+   if (l != 16) {
+      fprintf(stderr, "cfb_getiv failed");
+      return 1;
+   }
+   DO(cfb_encrypt(pt, ct, 64, &cfb));
+   
+   /* decode the block */
+   DO(cfb_setiv(iv, l, &cfb));
+   zeromem(tmp, sizeof(tmp));
+   DO(cfb_decrypt(ct, tmp, 64, &cfb));
+   if (memcmp(tmp, pt, 64) != 0) {
+      fprintf(stderr, "CFB failed");
+      return 1;
+   }
+#endif
+   
+#ifdef OFB
+   /* test OFB mode */
+   /* encode the block */
+   DO(ofb_start(cipher_idx, iv, key, 16, 0, &ofb));
+   l = sizeof(iv2);
+   DO(ofb_getiv(iv2, &l, &ofb));
+   if (l != 16 || memcmp(iv2, iv, 16)) {
+      fprintf(stderr, "ofb_getiv failed");
+      return 1;
+   }
+   DO(ofb_encrypt(pt, ct, 64, &ofb));
+   
+   /* decode the block */
+   DO(ofb_setiv(iv2, l, &ofb));
+   zeromem(tmp, sizeof(tmp));
+   DO(ofb_decrypt(ct, tmp, 64, &ofb));
+   if (memcmp(tmp, pt, 64) != 0) {
+      fprintf(stderr, "OFB failed");
+      return 1;
+   }
+#endif
+
+#ifdef CTR   
+   /* test CTR mode */
+   /* encode the block */
+   DO(ctr_start(cipher_idx, iv, key, 16, 0, CTR_COUNTER_LITTLE_ENDIAN, &ctr));
+   l = sizeof(iv2);
+   DO(ctr_getiv(iv2, &l, &ctr));
+   if (l != 16 || memcmp(iv2, iv, 16)) {
+      fprintf(stderr, "ctr_getiv failed");
+      return 1;
+   }
+   DO(ctr_encrypt(pt, ct, 57, &ctr));
+   
+   /* decode the block */
+   DO(ctr_setiv(iv2, l, &ctr));
+   zeromem(tmp, sizeof(tmp));
+   DO(ctr_decrypt(ct, tmp, 57, &ctr));
+   if (memcmp(tmp, pt, 57) != 0) {
+      fprintf(stderr, "CTR failed");
+      return 1;
+   }
+#endif
+         
+   return 0;
+}
+
+/* $Source: /cvs/libtom/libtomcrypt/testprof/modes_test.c,v $ */
+/* $Revision: 1.6 $ */
+/* $Date: 2005/05/21 12:51:25 $ */