--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/demos/test/modes_test.c	Tue Jun 15 14:07:21 2004 +0000
@@ -0,0 +1,112 @@
+/* test CFB/OFB/CBC modes */
+#include "test.h"
+
+int modes_test(void)
+{
+   unsigned char pt[64], ct[64], tmp[64], key[16], iv[16], iv2[16];
+   int x, 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, &test_yarrow);
+   yarrow_read(key, 16, &test_yarrow);
+   yarrow_read(iv,  16, &test_yarrow);
+   
+   /* get idx of AES handy */
+   cipher_idx = find_cipher("aes");
+   if (cipher_idx == -1) {
+      printf("test requires AES");
+      return 1;
+   }
+   
+   /* 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)) {
+      printf("cbc_getiv failed");
+      return 1;
+   }
+   for (x = 0; x < 4; x++) {
+      DO(cbc_encrypt(pt+x*16, ct+x*16, &cbc));
+   }
+   
+   /* decode the block */
+   DO(cbc_setiv(iv2, l, &cbc));
+   zeromem(tmp, sizeof(tmp));
+   for (x = 0; x < 4; x++) {
+      DO(cbc_decrypt(ct+x*16, tmp+x*16, &cbc));
+   }
+   if (memcmp(tmp, pt, 64) != 0) {
+      printf("CBC failed");
+      return 1;
+   }
+   
+   /* 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) {
+      printf("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) {
+      printf("CFB failed");
+      return 1;
+   }
+   
+   /* 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)) {
+      printf("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) {
+      printf("OFB failed");
+      return 1;
+   }
+   
+   /* test CTR mode */
+   /* encode the block */
+   DO(ctr_start(cipher_idx, iv, key, 16, 0, &ctr));
+   l = sizeof(iv2);
+   DO(ctr_getiv(iv2, &l, &ctr));
+   if (l != 16 || memcmp(iv2, iv, 16)) {
+      printf("ctr_getiv failed");
+      return 1;
+   }
+   DO(ctr_encrypt(pt, ct, 64, &ctr));
+   
+   /* decode the block */
+   DO(ctr_setiv(iv2, l, &ctr));
+   zeromem(tmp, sizeof(tmp));
+   DO(ctr_decrypt(ct, tmp, 64, &ctr));
+   if (memcmp(tmp, pt, 64) != 0) {
+      printf("CTR failed");
+      return 1;
+   }
+         
+   return 0;
+}