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#include <config.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <utils.h>
#include <stdlib.h>
#include <assert.h>
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <openssl/evp.h>
#include <openssl/opensslv.h>
/* This does check the AES and CHACHA20 implementations for compatibility
* with openssl.
*/
#define BSIZE (64*1024+12)
#define B2SIZE (1024+7)
static unsigned char buffer_auth[B2SIZE];
static unsigned char orig_plain_data[BSIZE];
static unsigned char enc_data[BSIZE + 32]; /* allow for tag */
static unsigned char dec_data[BSIZE];
static int cipher_test(const char *ocipher, gnutls_cipher_algorithm_t gcipher,
unsigned tag_size)
{
int ret;
gnutls_aead_cipher_hd_t hd;
gnutls_datum_t dkey, dnonce;
unsigned char key[32];
unsigned char nonce[32];
size_t enc_data_size, dec_data_size;
int dec_data_size2;
EVP_CIPHER_CTX *ctx;
const EVP_CIPHER *evp_cipher;
unsigned char tag[64];
unsigned i;
success("cipher: %s\n", ocipher);
/* decrypt with openssl */
evp_cipher = EVP_get_cipherbyname(ocipher);
if (!evp_cipher) {
/* XXX: fix version check later when LibreSSL fixes support for aes-ccm and chacha20-poly1305 */
#ifdef LIBRESSL_VERSION_NUMBER
fprintf(stderr, "EVP_get_cipherbyname failed for %s\n", ocipher);
return -1;
#else
/* OpenSSL should always work! */
fail("EVP_get_cipherbyname failed for %s\n", ocipher);
#endif
}
for (i = 0; i < 32; i++) { /* try with multiple keys and nonces */
assert(gnutls_rnd
(GNUTLS_RND_NONCE, orig_plain_data,
sizeof(orig_plain_data)) >= 0);
assert(gnutls_rnd
(GNUTLS_RND_NONCE, buffer_auth,
sizeof(buffer_auth)) >= 0);
assert(gnutls_rnd(GNUTLS_RND_NONCE, key, sizeof(key)) >= 0);
assert(gnutls_rnd(GNUTLS_RND_NONCE, nonce, sizeof(nonce)) >= 0);
dkey.data = (void *)key;
dkey.size = gnutls_cipher_get_key_size(gcipher);
assert(gnutls_aead_cipher_init(&hd, gcipher, &dkey) >= 0);
dnonce.data = (void *)nonce;
dnonce.size = gnutls_cipher_get_iv_size(gcipher);
enc_data_size = sizeof(enc_data);
assert(gnutls_aead_cipher_encrypt(hd, dnonce.data, dnonce.size,
buffer_auth,
sizeof(buffer_auth), tag_size,
orig_plain_data,
sizeof(orig_plain_data),
enc_data,
&enc_data_size) >= 0);
if (debug)
success("encrypted %d bytes, to %d\n",
(int)sizeof(orig_plain_data),
(int)enc_data_size);
dec_data_size = sizeof(dec_data);
ret = gnutls_aead_cipher_decrypt(hd, dnonce.data, dnonce.size,
buffer_auth,
sizeof(buffer_auth), tag_size,
enc_data, enc_data_size,
dec_data, &dec_data_size);
if (ret < 0) {
fail("error in gnutls_aead_cipher_decrypt for %s: %s\n",
ocipher, gnutls_strerror(ret));
}
if (dec_data_size != sizeof(orig_plain_data)
|| memcmp(dec_data, orig_plain_data,
sizeof(orig_plain_data)) != 0) {
fail("gnutls encrypt-decrypt failed (got: %d, expected: %d)\n", (int)dec_data_size, (int)sizeof(orig_plain_data));
}
gnutls_aead_cipher_deinit(hd);
ctx = EVP_CIPHER_CTX_new();
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
if (gcipher == GNUTLS_CIPHER_AES_128_CCM
|| gcipher == GNUTLS_CIPHER_AES_256_CCM) {
assert(EVP_CipherInit_ex(ctx, evp_cipher, 0, 0, 0, 0) >
0);
assert(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, dnonce.size, 0)==1);
assert(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, tag_size,
enc_data + enc_data_size - tag_size) == 1);
assert(EVP_CipherInit_ex(ctx, 0, 0, key, nonce, 0) >
0);
dec_data_size2 = sizeof(dec_data);
/* Add plain size */
assert(EVP_CipherUpdate
(ctx, NULL, &dec_data_size2, NULL,
enc_data_size - tag_size) > 0);
/* Add AAD */
assert(EVP_CipherUpdate
(ctx, NULL, &dec_data_size2, buffer_auth,
sizeof(buffer_auth)) > 0);
/* Decrypt */
assert(EVP_CipherUpdate
(ctx, dec_data, &dec_data_size2, enc_data,
enc_data_size - tag_size) > 0);
dec_data_size = dec_data_size2;
dec_data_size2 = tag_size;
if (dec_data_size != sizeof(orig_plain_data)
|| memcmp(dec_data, orig_plain_data,
sizeof(orig_plain_data)) != 0) {
fail("openssl decrypt failed for %s\n", ocipher);
}
} else
#endif
{
assert(EVP_CipherInit_ex(ctx, evp_cipher, NULL, key, nonce, 0) >
0);
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_TAG, tag_size,
enc_data + enc_data_size - tag_size);
dec_data_size2 = sizeof(dec_data);
/* Add AAD */
assert(EVP_CipherUpdate
(ctx, NULL, &dec_data_size2, buffer_auth,
sizeof(buffer_auth)) > 0);
/* Decrypt */
assert(EVP_CipherUpdate
(ctx, dec_data, &dec_data_size2, enc_data,
enc_data_size - tag_size) > 0);
dec_data_size = dec_data_size2;
dec_data_size2 = tag_size;
assert(EVP_CipherFinal_ex(ctx, tag, &dec_data_size2) > 0);
if (dec_data_size != sizeof(orig_plain_data)
|| memcmp(dec_data, orig_plain_data,
sizeof(orig_plain_data)) != 0) {
fail("openssl decrypt failed for %s\n", ocipher);
}
}
EVP_CIPHER_CTX_free(ctx);
}
return 0;
}
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "<%d>| %s", level, str);
}
void doit(void)
{
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(4711);
global_init();
OpenSSL_add_all_algorithms();
/* ciphers */
cipher_test("aes-128-gcm", GNUTLS_CIPHER_AES_128_GCM, 16);
cipher_test("aes-256-gcm", GNUTLS_CIPHER_AES_256_GCM, 16);
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
if (!gnutls_fips140_mode_enabled()) {
cipher_test("chacha20-poly1305", GNUTLS_CIPHER_CHACHA20_POLY1305, 16);
}
cipher_test("aes-128-ccm", GNUTLS_CIPHER_AES_128_CCM, 16);
cipher_test("aes-256-ccm", GNUTLS_CIPHER_AES_256_CCM, 16);
#endif
gnutls_global_deinit();
return;
}
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