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/*
* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <string.h>
#include <openssl/evp.h>
#include <openssl/bio.h>
#include <openssl/rand.h>
int main()
{
BIO *b;
static const unsigned char key[16] = { 0 };
static unsigned char inp[1024] = { 0 };
unsigned char out[1024], ref[1024];
int i, lref, len;
/* Fill buffer with non-zero data so that over steps can be detected */
if (RAND_bytes(inp, sizeof(inp)) <= 0)
return -1;
/*
* Exercise CBC cipher
*/
/* reference output for single-chunk operation */
b = BIO_new(BIO_f_cipher());
if (!BIO_set_cipher(b, EVP_aes_128_cbc(), key, NULL, 0))
return -1;
BIO_push(b, BIO_new_mem_buf(inp, sizeof(inp)));
lref = BIO_read(b, ref, sizeof(ref));
BIO_free_all(b);
/* perform split operations and compare to reference */
for (i = 1; i < lref; i++) {
b = BIO_new(BIO_f_cipher());
if (!BIO_set_cipher(b, EVP_aes_128_cbc(), key, NULL, 0))
return -1;
BIO_push(b, BIO_new_mem_buf(inp, sizeof(inp)));
memset(out, 0, sizeof(out));
out[i] = ~ref[i];
len = BIO_read(b, out, i);
/* check for overstep */
if (out[i] != (unsigned char)~ref[i]) {
fprintf(stderr, "CBC output overstep@%d\n", i);
return 1;
}
len += BIO_read(b, out + len, sizeof(out) - len);
BIO_free_all(b);
if (len != lref || memcmp(out, ref, len)) {
fprintf(stderr, "CBC output mismatch@%d\n", i);
return 2;
}
}
/* perform small-chunk operations and compare to reference */
for (i = 1; i < lref / 2; i++) {
int delta;
b = BIO_new(BIO_f_cipher());
if (!BIO_set_cipher(b, EVP_aes_128_cbc(), key, NULL, 0))
return -1;
BIO_push(b, BIO_new_mem_buf(inp, sizeof(inp)));
memset(out, 0, sizeof(out));
for (len = 0; (delta = BIO_read(b, out + len, i)); ) {
len += delta;
}
BIO_free_all(b);
if (len != lref || memcmp(out, ref, len)) {
fprintf(stderr, "CBC output mismatch@%d\n", i);
return 3;
}
}
/*
* Exercise CTR cipher
*/
/* reference output for single-chunk operation */
b = BIO_new(BIO_f_cipher());
if (!BIO_set_cipher(b, EVP_aes_128_ctr(), key, NULL, 0))
return -1;
BIO_push(b, BIO_new_mem_buf(inp, sizeof(inp)));
lref = BIO_read(b, ref, sizeof(ref));
BIO_free_all(b);
/* perform split operations and compare to reference */
for (i = 1; i < lref; i++) {
b = BIO_new(BIO_f_cipher());
if (!BIO_set_cipher(b, EVP_aes_128_ctr(), key, NULL, 0))
return -1;
BIO_push(b, BIO_new_mem_buf(inp, sizeof(inp)));
memset(out, 0, sizeof(out));
out[i] = ~ref[i];
len = BIO_read(b, out, i);
/* check for overstep */
if (out[i] != (unsigned char)~ref[i]) {
fprintf(stderr, "CTR output overstep@%d\n", i);
return 4;
}
len += BIO_read(b, out + len, sizeof(out) - len);
BIO_free_all(b);
if (len != lref || memcmp(out, ref, len)) {
fprintf(stderr, "CTR output mismatch@%d\n", i);
return 5;
}
}
/* perform small-chunk operations and compare to reference */
for (i = 1; i < lref / 2; i++) {
int delta;
b = BIO_new(BIO_f_cipher());
if (!BIO_set_cipher(b, EVP_aes_128_ctr(), key, NULL, 0))
return -1;
BIO_push(b, BIO_new_mem_buf(inp, sizeof(inp)));
memset(out, 0, sizeof(out));
for (len = 0; (delta = BIO_read(b, out + len, i)); ) {
len += delta;
}
BIO_free_all(b);
if (len != lref || memcmp(out, ref, len)) {
fprintf(stderr, "CTR output mismatch@%d\n", i);
return 6;
}
}
return 0;
}
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