47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/* test CFB/OFB/CBC modes */
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#include "test.h"
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int modes_test(void)
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{
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unsigned char pt[64], ct[64], tmp[64], key[16], iv[16];
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int x, cipher_idx;
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symmetric_CBC cbc;
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/* make a random pt, key and iv */
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yarrow_read(pt, 64, &test_yarrow);
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yarrow_read(key, 16, &test_yarrow);
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yarrow_read(iv, 16, &test_yarrow);
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/* test CBC mode */
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cipher_idx = find_cipher("aes");
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if (cipher_idx == -1) {
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printf("test requires AES");
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return 1;
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}
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/* encode the block */
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DO(cbc_start(cipher_idx, iv, key, 16, 0, &cbc));
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for (x = 0; x < 4; x++) {
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DO(cbc_encrypt(pt+x*16, ct+x*16, &cbc));
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}
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/* decode the block */
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DO(cbc_start(cipher_idx, iv, key, 16, 0, &cbc));
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for (x = 0; x < 4; x++) {
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DO(cbc_decrypt(ct+x*16, tmp+x*16, &cbc));
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}
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if (memcmp(tmp, pt, 64) != 0) {
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printf("CBC failed");
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return 1;
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}
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/*
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extern int cbc_start(int cipher, const unsigned char *IV, const unsigned char *key,
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int keylen, int num_rounds, symmetric_CBC *cbc);
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extern int cbc_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_CBC *cbc);
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extern int cbc_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_CBC *cbc);
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*/
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}
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