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mbedtls/tests/suites/test_suite_cipher.function

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/* BEGIN_HEADER */
#include "mbedtls/cipher.h"
#include "mbedtls/aes.h"
#if defined(MBEDTLS_GCM_C)
#include "mbedtls/gcm.h"
#endif
#if defined(MBEDTLS_CIPHER_MODE_AEAD) || defined(MBEDTLS_NIST_KW_C)
#define MBEDTLS_CIPHER_AUTH_CRYPT
#endif
/* Check the internal consistency of a cipher info structure, and
* check it against mbedtls_cipher_info_from_xxx(). */
static int check_cipher_info(mbedtls_cipher_type_t type,
const mbedtls_cipher_info_t *info)
{
size_t key_bitlen, block_size, iv_size;
TEST_ASSERT(info != NULL);
TEST_EQUAL(type, mbedtls_cipher_info_get_type(info));
TEST_EQUAL(type, info->type);
TEST_ASSERT(mbedtls_cipher_info_from_type(type) == info);
TEST_EQUAL(info->mode, mbedtls_cipher_info_get_mode(info));
/* Insist that get_name() return the string from the structure and
* not a copy. A copy would have an unknown storage duration. */
TEST_ASSERT(mbedtls_cipher_info_get_name(info) == info->name);
TEST_ASSERT(mbedtls_cipher_info_from_string(info->name) == info);
key_bitlen = mbedtls_cipher_info_get_key_bitlen(info);
block_size = mbedtls_cipher_info_get_block_size(info);
iv_size = mbedtls_cipher_info_get_iv_size(info);
if (info->type == MBEDTLS_CIPHER_NULL) {
TEST_ASSERT(key_bitlen == 0);
TEST_ASSERT(block_size == 1);
TEST_ASSERT(iv_size == 0);
} else if (info->mode == MBEDTLS_MODE_XTS) {
TEST_ASSERT(key_bitlen == 256 ||
key_bitlen == 384 ||
key_bitlen == 512);
} else if (!strncmp(info->name, "DES-EDE3-", 9)) {
TEST_ASSERT(key_bitlen == 192);
TEST_ASSERT(!mbedtls_cipher_info_has_variable_key_bitlen(info));
TEST_ASSERT(block_size == 8);
} else if (!strncmp(info->name, "DES-EDE-", 8)) {
TEST_ASSERT(key_bitlen == 128);
TEST_ASSERT(!mbedtls_cipher_info_has_variable_key_bitlen(info));
TEST_ASSERT(block_size == 8);
} else if (!strncmp(info->name, "DES-", 4)) {
TEST_ASSERT(key_bitlen == 64);
TEST_ASSERT(!mbedtls_cipher_info_has_variable_key_bitlen(info));
TEST_ASSERT(block_size == 8);
} else if (!strncmp(info->name, "AES", 3)) {
TEST_ASSERT(key_bitlen == 128 ||
key_bitlen == 192 ||
key_bitlen == 256);
TEST_ASSERT(!mbedtls_cipher_info_has_variable_key_bitlen(info));
TEST_ASSERT(block_size == 16);
} else {
TEST_ASSERT(key_bitlen == 128 ||
key_bitlen == 192 ||
key_bitlen == 256);
}
TEST_LE_U(key_bitlen, MBEDTLS_MAX_KEY_LENGTH * 8);
TEST_LE_U(block_size, MBEDTLS_MAX_BLOCK_LENGTH);
TEST_LE_U(iv_size, MBEDTLS_MAX_IV_LENGTH);
if (strstr(info->name, "-ECB") != NULL) {
TEST_ASSERT(iv_size == 0);
TEST_ASSERT(!mbedtls_cipher_info_has_variable_iv_size(info));
} else if (strstr(info->name, "-CBC") != NULL ||
strstr(info->name, "-CTR") != NULL) {
TEST_ASSERT(iv_size == block_size);
TEST_ASSERT(!mbedtls_cipher_info_has_variable_iv_size(info));
} else if (strstr(info->name, "-GCM") != NULL) {
TEST_ASSERT(iv_size == block_size - 4);
TEST_ASSERT(mbedtls_cipher_info_has_variable_iv_size(info));
}
return 1;
exit:
return 0;
}
#if defined(MBEDTLS_CIPHER_AUTH_CRYPT)
/* Helper for resetting key/direction
*
* The documentation doesn't explicitly say whether calling
* mbedtls_cipher_setkey() twice is allowed or not. This currently works with
* the default software implementation, but only by accident. It isn't
* guaranteed to work with new ciphers or with alternative implementations of
* individual ciphers, and it doesn't work with the PSA wrappers. So don't do
* it, and instead start with a fresh context.
*/
static int cipher_reset_key(mbedtls_cipher_context_t *ctx, int cipher_id,
int use_psa, size_t tag_len, const data_t *key, int direction)
{
mbedtls_cipher_free(ctx);
mbedtls_cipher_init(ctx);
#if !defined(MBEDTLS_USE_PSA_CRYPTO) || !defined(MBEDTLS_TEST_DEPRECATED)
(void) use_psa;
(void) tag_len;
#else
if (use_psa == 1) {
TEST_ASSERT(0 == mbedtls_cipher_setup_psa(ctx,
mbedtls_cipher_info_from_type(cipher_id),
tag_len));
} else
#endif /* !MBEDTLS_USE_PSA_CRYPTO || !MBEDTLS_TEST_DEPRECATED */
{
TEST_ASSERT(0 == mbedtls_cipher_setup(ctx,
mbedtls_cipher_info_from_type(cipher_id)));
}
TEST_ASSERT(0 == mbedtls_cipher_setkey(ctx, key->x, 8 * key->len,
direction));
return 1;
exit:
return 0;
}
/*
* Check if a buffer is all-0 bytes:
* return 1 if it is,
* 0 if it isn't.
*/
int buffer_is_all_zero(const uint8_t *buf, size_t size)
{
for (size_t i = 0; i < size; i++) {
if (buf[i] != 0) {
return 0;
}
}
return 1;
}
#endif /* MBEDTLS_CIPHER_AUTH_CRYPT */
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_CIPHER_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void mbedtls_cipher_list()
{
const int *cipher_type;
for (cipher_type = mbedtls_cipher_list(); *cipher_type != 0; cipher_type++) {
const mbedtls_cipher_info_t *info =
mbedtls_cipher_info_from_type(*cipher_type);
mbedtls_test_set_step(*cipher_type);
if (!check_cipher_info(*cipher_type, info)) {
goto exit;
}
}
}
/* END_CASE */
/* BEGIN_CASE */
void cipher_invalid_param_unconditional()
{
mbedtls_cipher_context_t valid_ctx;
mbedtls_cipher_context_t invalid_ctx;
mbedtls_operation_t valid_operation = MBEDTLS_ENCRYPT;
mbedtls_cipher_padding_t valid_mode = MBEDTLS_PADDING_ZEROS;
unsigned char valid_buffer[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
int valid_size = sizeof(valid_buffer);
int valid_bitlen = valid_size * 8;
const mbedtls_cipher_info_t *valid_info = mbedtls_cipher_info_from_type(
*(mbedtls_cipher_list()));
size_t size_t_var;
(void) valid_mode; /* In some configurations this is unused */
mbedtls_cipher_init(&valid_ctx);
mbedtls_cipher_init(&invalid_ctx);
TEST_ASSERT(mbedtls_cipher_setup(&valid_ctx, valid_info) == 0);
/* mbedtls_cipher_setup() */
TEST_ASSERT(mbedtls_cipher_setup(&valid_ctx, NULL) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
/* mbedtls_cipher_get_block_size() */
TEST_ASSERT(mbedtls_cipher_get_block_size(&invalid_ctx) == 0);
/* mbedtls_cipher_get_cipher_mode() */
TEST_ASSERT(mbedtls_cipher_get_cipher_mode(&invalid_ctx) ==
MBEDTLS_MODE_NONE);
/* mbedtls_cipher_get_iv_size() */
TEST_ASSERT(mbedtls_cipher_get_iv_size(&invalid_ctx) == 0);
/* mbedtls_cipher_get_type() */
TEST_ASSERT(
mbedtls_cipher_get_type(&invalid_ctx) ==
MBEDTLS_CIPHER_NONE);
/* mbedtls_cipher_get_name() */
TEST_ASSERT(mbedtls_cipher_get_name(&invalid_ctx) == 0);
/* mbedtls_cipher_get_key_bitlen() */
TEST_ASSERT(mbedtls_cipher_get_key_bitlen(&invalid_ctx) ==
MBEDTLS_KEY_LENGTH_NONE);
/* mbedtls_cipher_get_operation() */
TEST_ASSERT(mbedtls_cipher_get_operation(&invalid_ctx) ==
MBEDTLS_OPERATION_NONE);
/* mbedtls_cipher_setkey() */
TEST_ASSERT(
mbedtls_cipher_setkey(&invalid_ctx,
valid_buffer,
valid_bitlen,
valid_operation) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
/* mbedtls_cipher_set_iv() */
TEST_ASSERT(
mbedtls_cipher_set_iv(&invalid_ctx,
valid_buffer,
valid_size) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
/* mbedtls_cipher_reset() */
TEST_ASSERT(mbedtls_cipher_reset(&invalid_ctx) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
/* mbedtls_cipher_update_ad() */
TEST_ASSERT(
mbedtls_cipher_update_ad(&invalid_ctx,
valid_buffer,
valid_size) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
#endif /* defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C) */
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
/* mbedtls_cipher_set_padding_mode() */
TEST_ASSERT(mbedtls_cipher_set_padding_mode(&invalid_ctx, valid_mode) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
#endif
/* mbedtls_cipher_update() */
TEST_ASSERT(
mbedtls_cipher_update(&invalid_ctx,
valid_buffer,
valid_size,
valid_buffer,
&size_t_var) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
/* mbedtls_cipher_finish() */
TEST_ASSERT(
mbedtls_cipher_finish(&invalid_ctx,
valid_buffer,
&size_t_var) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
/* mbedtls_cipher_write_tag() */
TEST_ASSERT(
mbedtls_cipher_write_tag(&invalid_ctx,
valid_buffer,
valid_size) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
/* mbedtls_cipher_check_tag() */
TEST_ASSERT(
mbedtls_cipher_check_tag(&invalid_ctx,
valid_buffer,
valid_size) ==
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
#endif /* defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C) */
exit:
mbedtls_cipher_free(&invalid_ctx);
mbedtls_cipher_free(&valid_ctx);
}
/* END_CASE */
/* BEGIN_CASE */
void cipher_invalid_param_conditional()
{
mbedtls_cipher_context_t valid_ctx;
mbedtls_operation_t invalid_operation = 100;
unsigned char valid_buffer[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
int valid_size = sizeof(valid_buffer);
int valid_bitlen = valid_size * 8;
TEST_EQUAL(
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA,
mbedtls_cipher_setkey(&valid_ctx,
valid_buffer,
valid_bitlen,
invalid_operation));
exit:
;
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_AES_C */
void cipher_special_behaviours()
{
const mbedtls_cipher_info_t *cipher_info;
mbedtls_cipher_context_t ctx;
unsigned char input[32];
unsigned char output[32];
#if defined(MBEDTLS_CIPHER_MODE_CBC)
unsigned char iv[32];
#endif
size_t olen = 0;
mbedtls_cipher_init(&ctx);
memset(input, 0, sizeof(input));
memset(output, 0, sizeof(output));
#if defined(MBEDTLS_CIPHER_MODE_CBC)
memset(iv, 0, sizeof(iv));
/* Check and get info structures */
cipher_info = mbedtls_cipher_info_from_type(MBEDTLS_CIPHER_AES_128_CBC);
TEST_ASSERT(NULL != cipher_info);
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx, cipher_info));
/* IV too big */
TEST_ASSERT(mbedtls_cipher_set_iv(&ctx, iv, MBEDTLS_MAX_IV_LENGTH + 1)
== MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE);
/* IV too small */
TEST_ASSERT(mbedtls_cipher_set_iv(&ctx, iv, 0)
== MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
mbedtls_cipher_free(&ctx);
mbedtls_cipher_init(&ctx);
#endif /* MBEDTLS_CIPHER_MODE_CBC */
cipher_info = mbedtls_cipher_info_from_type(MBEDTLS_CIPHER_AES_128_ECB);
TEST_ASSERT(NULL != cipher_info);
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx, cipher_info));
/* Update ECB with partial block */
TEST_ASSERT(mbedtls_cipher_update(&ctx, input, 1, output, &olen)
== MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED);
exit:
mbedtls_cipher_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE */
void enc_dec_buf(int cipher_id, char *cipher_string, int key_len,
int length_val, int pad_mode)
{
size_t length = length_val, outlen, total_len, i, block_size, iv_len;
unsigned char key[64];
unsigned char iv[16];
unsigned char ad[13];
unsigned char tag[16];
unsigned char inbuf[64];
unsigned char encbuf[64];
unsigned char decbuf[64];
const mbedtls_cipher_info_t *cipher_info;
mbedtls_cipher_context_t ctx_dec;
mbedtls_cipher_context_t ctx_enc;
/*
* Prepare contexts
*/
mbedtls_cipher_init(&ctx_dec);
mbedtls_cipher_init(&ctx_enc);
memset(key, 0x2a, sizeof(key));
/* Check and get info structures */
cipher_info = mbedtls_cipher_info_from_type(cipher_id);
TEST_ASSERT(NULL != cipher_info);
TEST_ASSERT(mbedtls_cipher_info_from_string(cipher_string) == cipher_info);
TEST_ASSERT(strcmp(mbedtls_cipher_info_get_name(cipher_info),
cipher_string) == 0);
/* Initialise enc and dec contexts */
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx_dec, cipher_info));
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx_enc, cipher_info));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx_dec, key, key_len, MBEDTLS_DECRYPT));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx_enc, key, key_len, MBEDTLS_ENCRYPT));
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
if (-1 != pad_mode) {
TEST_ASSERT(0 == mbedtls_cipher_set_padding_mode(&ctx_dec, pad_mode));
TEST_ASSERT(0 == mbedtls_cipher_set_padding_mode(&ctx_enc, pad_mode));
}
#else
(void) pad_mode;
#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
/*
* Do a few encode/decode cycles
*/
for (i = 0; i < 3; i++) {
memset(iv, 0x00 + i, sizeof(iv));
memset(ad, 0x10 + i, sizeof(ad));
memset(inbuf, 0x20 + i, sizeof(inbuf));
memset(encbuf, 0, sizeof(encbuf));
memset(decbuf, 0, sizeof(decbuf));
memset(tag, 0, sizeof(tag));
if (NULL != strstr(cipher_info->name, "CCM*-NO-TAG")) {
iv_len = 13; /* For CCM, IV length is expected to be between 7 and 13 bytes.
* For CCM*-NO-TAG, IV length must be exactly 13 bytes long. */
} else if (cipher_info->type == MBEDTLS_CIPHER_CHACHA20 ||
cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) {
iv_len = 12;
} else {
iv_len = sizeof(iv);
}
TEST_ASSERT(0 == mbedtls_cipher_set_iv(&ctx_dec, iv, iv_len));
TEST_ASSERT(0 == mbedtls_cipher_set_iv(&ctx_enc, iv, iv_len));
TEST_ASSERT(0 == mbedtls_cipher_reset(&ctx_dec));
TEST_ASSERT(0 == mbedtls_cipher_reset(&ctx_enc));
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
int expected = (cipher_info->mode == MBEDTLS_MODE_GCM ||
cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) ?
0 : MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
TEST_EQUAL(expected, mbedtls_cipher_update_ad(&ctx_dec, ad, sizeof(ad) - i));
TEST_EQUAL(expected, mbedtls_cipher_update_ad(&ctx_enc, ad, sizeof(ad) - i));
#endif
block_size = mbedtls_cipher_get_block_size(&ctx_enc);
TEST_ASSERT(block_size != 0);
/* encode length number of bytes from inbuf */
TEST_ASSERT(0 == mbedtls_cipher_update(&ctx_enc, inbuf, length, encbuf, &outlen));
total_len = outlen;
TEST_ASSERT(total_len == length ||
(total_len % block_size == 0 &&
total_len < length &&
total_len + block_size > length));
TEST_ASSERT(0 == mbedtls_cipher_finish(&ctx_enc, encbuf + outlen, &outlen));
total_len += outlen;
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
TEST_EQUAL(expected, mbedtls_cipher_write_tag(&ctx_enc, tag, sizeof(tag)));
#endif
TEST_ASSERT(total_len == length ||
(total_len % block_size == 0 &&
total_len > length &&
total_len <= length + block_size));
/* decode the previously encoded string */
TEST_ASSERT(0 == mbedtls_cipher_update(&ctx_dec, encbuf, total_len, decbuf, &outlen));
total_len = outlen;
TEST_ASSERT(total_len == length ||
(total_len % block_size == 0 &&
total_len < length &&
total_len + block_size >= length));
TEST_ASSERT(0 == mbedtls_cipher_finish(&ctx_dec, decbuf + outlen, &outlen));
total_len += outlen;
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
TEST_EQUAL(expected, mbedtls_cipher_check_tag(&ctx_dec, tag, sizeof(tag)));
#endif
/* check result */
TEST_ASSERT(total_len == length);
TEST_ASSERT(0 == memcmp(inbuf, decbuf, length));
}
/*
* Done
*/
exit:
mbedtls_cipher_free(&ctx_dec);
mbedtls_cipher_free(&ctx_enc);
}
/* END_CASE */
/* BEGIN_CASE */
void enc_fail(int cipher_id, int pad_mode, int key_len, int length_val,
int ret)
{
size_t length = length_val;
unsigned char key[32];
unsigned char iv[16];
const mbedtls_cipher_info_t *cipher_info;
mbedtls_cipher_context_t ctx;
unsigned char inbuf[64];
unsigned char encbuf[64];
size_t outlen = 0;
memset(key, 0, 32);
memset(iv, 0, 16);
mbedtls_cipher_init(&ctx);
memset(inbuf, 5, 64);
memset(encbuf, 0, 64);
/* Check and get info structures */
cipher_info = mbedtls_cipher_info_from_type(cipher_id);
TEST_ASSERT(NULL != cipher_info);
/* Initialise context */
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx, cipher_info));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx, key, key_len, MBEDTLS_ENCRYPT));
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
TEST_ASSERT(0 == mbedtls_cipher_set_padding_mode(&ctx, pad_mode));
#else
(void) pad_mode;
#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
TEST_ASSERT(0 == mbedtls_cipher_set_iv(&ctx, iv, 16));
TEST_ASSERT(0 == mbedtls_cipher_reset(&ctx));
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
int expected = (cipher_info->mode == MBEDTLS_MODE_GCM ||
cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) ?
0 : MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
TEST_EQUAL(expected, mbedtls_cipher_update_ad(&ctx, NULL, 0));
#endif
/* encode length number of bytes from inbuf */
TEST_ASSERT(0 == mbedtls_cipher_update(&ctx, inbuf, length, encbuf, &outlen));
TEST_ASSERT(ret == mbedtls_cipher_finish(&ctx, encbuf + outlen, &outlen));
/* done */
exit:
mbedtls_cipher_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE */
void dec_empty_buf(int cipher,
int expected_update_ret,
int expected_finish_ret)
{
unsigned char key[32];
unsigned char *iv = NULL;
size_t iv_len = 16;
mbedtls_cipher_context_t ctx_dec;
const mbedtls_cipher_info_t *cipher_info;
unsigned char encbuf[64];
unsigned char decbuf[64];
size_t outlen = 0;
memset(key, 0, 32);
mbedtls_cipher_init(&ctx_dec);
memset(encbuf, 0, 64);
memset(decbuf, 0, 64);
/* Initialise context */
cipher_info = mbedtls_cipher_info_from_type(cipher);
TEST_ASSERT(NULL != cipher_info);
if (cipher_info->type == MBEDTLS_CIPHER_CHACHA20 ||
cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) {
iv_len = 12;
}
TEST_CALLOC(iv, iv_len);
memset(iv, 0, iv_len);
TEST_ASSERT(sizeof(key) * 8 >= mbedtls_cipher_info_get_key_bitlen(cipher_info));
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx_dec, cipher_info));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx_dec,
key, mbedtls_cipher_info_get_key_bitlen(cipher_info),
MBEDTLS_DECRYPT));
TEST_ASSERT(0 == mbedtls_cipher_set_iv(&ctx_dec, iv, iv_len));
TEST_ASSERT(0 == mbedtls_cipher_reset(&ctx_dec));
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
int expected = (cipher_info->mode == MBEDTLS_MODE_GCM ||
cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) ?
0 : MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
TEST_EQUAL(expected, mbedtls_cipher_update_ad(&ctx_dec, NULL, 0));
#endif
/* decode 0-byte string */
TEST_ASSERT(expected_update_ret ==
mbedtls_cipher_update(&ctx_dec, encbuf, 0, decbuf, &outlen));
TEST_ASSERT(0 == outlen);
if (expected_finish_ret == 0 &&
(cipher_info->mode == MBEDTLS_MODE_CBC ||
cipher_info->mode == MBEDTLS_MODE_ECB)) {
/* Non-CBC and non-ECB ciphers are OK with decrypting empty buffers and
* return success, not MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED, when
* decrypting an empty buffer.
* On the other hand, CBC and ECB ciphers need a full block of input.
*/
expected_finish_ret = MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
}
TEST_ASSERT(expected_finish_ret == mbedtls_cipher_finish(
&ctx_dec, decbuf + outlen, &outlen));
TEST_ASSERT(0 == outlen);
exit:
mbedtls_free(iv);
mbedtls_cipher_free(&ctx_dec);
}
/* END_CASE */
/* BEGIN_CASE */
void enc_dec_buf_multipart(int cipher_id, int key_len, int first_length_val,
int second_length_val, int pad_mode,
int first_encrypt_output_len, int second_encrypt_output_len,
int first_decrypt_output_len, int second_decrypt_output_len)
{
size_t first_length = first_length_val;
size_t second_length = second_length_val;
size_t length = first_length + second_length;
size_t block_size;
size_t iv_len;
unsigned char key[32];
unsigned char iv[16];
mbedtls_cipher_context_t ctx_dec;
mbedtls_cipher_context_t ctx_enc;
const mbedtls_cipher_info_t *cipher_info;
unsigned char inbuf[64];
unsigned char encbuf[64];
unsigned char decbuf[64];
size_t outlen = 0;
size_t totaloutlen = 0;
memset(key, 0, 32);
memset(iv, 0, 16);
mbedtls_cipher_init(&ctx_dec);
mbedtls_cipher_init(&ctx_enc);
memset(inbuf, 5, 64);
memset(encbuf, 0, 64);
memset(decbuf, 0, 64);
/* Initialise enc and dec contexts */
cipher_info = mbedtls_cipher_info_from_type(cipher_id);
TEST_ASSERT(NULL != cipher_info);
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx_dec, cipher_info));
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx_enc, cipher_info));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx_dec, key, key_len, MBEDTLS_DECRYPT));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx_enc, key, key_len, MBEDTLS_ENCRYPT));
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
if (-1 != pad_mode) {
TEST_ASSERT(0 == mbedtls_cipher_set_padding_mode(&ctx_dec, pad_mode));
TEST_ASSERT(0 == mbedtls_cipher_set_padding_mode(&ctx_enc, pad_mode));
}
#else
(void) pad_mode;
#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
if (NULL != strstr(cipher_info->name, "CCM*-NO-TAG")) {
iv_len = 13; /* For CCM, IV length is expected to be between 7 and 13 bytes.
* For CCM*-NO-TAG, IV length must be exactly 13 bytes long. */
} else if (cipher_info->type == MBEDTLS_CIPHER_CHACHA20 ||
cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) {
iv_len = 12;
} else {
iv_len = sizeof(iv);
}
TEST_ASSERT(0 == mbedtls_cipher_set_iv(&ctx_dec, iv, iv_len));
TEST_ASSERT(0 == mbedtls_cipher_set_iv(&ctx_enc, iv, iv_len));
TEST_ASSERT(0 == mbedtls_cipher_reset(&ctx_dec));
TEST_ASSERT(0 == mbedtls_cipher_reset(&ctx_enc));
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
int expected = (cipher_info->mode == MBEDTLS_MODE_GCM ||
cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) ?
0 : MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
TEST_EQUAL(expected, mbedtls_cipher_update_ad(&ctx_dec, NULL, 0));
TEST_EQUAL(expected, mbedtls_cipher_update_ad(&ctx_enc, NULL, 0));
#endif
block_size = mbedtls_cipher_get_block_size(&ctx_enc);
TEST_ASSERT(block_size != 0);
/* encode length number of bytes from inbuf */
TEST_ASSERT(0 == mbedtls_cipher_update(&ctx_enc, inbuf, first_length, encbuf, &outlen));
TEST_ASSERT((size_t) first_encrypt_output_len == outlen);
totaloutlen = outlen;
TEST_ASSERT(0 ==
mbedtls_cipher_update(&ctx_enc, inbuf + first_length, second_length,
encbuf + totaloutlen,
&outlen));
TEST_ASSERT((size_t) second_encrypt_output_len == outlen);
totaloutlen += outlen;
TEST_ASSERT(totaloutlen == length ||
(totaloutlen % block_size == 0 &&
totaloutlen < length &&
totaloutlen + block_size > length));
TEST_ASSERT(0 == mbedtls_cipher_finish(&ctx_enc, encbuf + totaloutlen, &outlen));
totaloutlen += outlen;
TEST_ASSERT(totaloutlen == length ||
(totaloutlen % block_size == 0 &&
totaloutlen > length &&
totaloutlen <= length + block_size));
/* decode the previously encoded string */
second_length = totaloutlen - first_length;
TEST_ASSERT(0 == mbedtls_cipher_update(&ctx_dec, encbuf, first_length, decbuf, &outlen));
TEST_ASSERT((size_t) first_decrypt_output_len == outlen);
totaloutlen = outlen;
TEST_ASSERT(0 ==
mbedtls_cipher_update(&ctx_dec, encbuf + first_length, second_length,
decbuf + totaloutlen,
&outlen));
TEST_ASSERT((size_t) second_decrypt_output_len == outlen);
totaloutlen += outlen;
TEST_ASSERT(totaloutlen == length ||
(totaloutlen % block_size == 0 &&
totaloutlen < length &&
totaloutlen + block_size >= length));
TEST_ASSERT(0 == mbedtls_cipher_finish(&ctx_dec, decbuf + totaloutlen, &outlen));
totaloutlen += outlen;
TEST_ASSERT(totaloutlen == length);
TEST_ASSERT(0 == memcmp(inbuf, decbuf, length));
exit:
mbedtls_cipher_free(&ctx_dec);
mbedtls_cipher_free(&ctx_enc);
}
/* END_CASE */
/* BEGIN_CASE */
void decrypt_test_vec(int cipher_id, int pad_mode, data_t *key,
data_t *iv, data_t *cipher,
data_t *clear, data_t *ad, data_t *tag,
int finish_result, int tag_result)
{
unsigned char output[265];
mbedtls_cipher_context_t ctx;
size_t outlen, total_len;
mbedtls_cipher_init(&ctx);
memset(output, 0x00, sizeof(output));
#if !defined(MBEDTLS_GCM_C) && !defined(MBEDTLS_CHACHAPOLY_C)
((void) ad);
((void) tag);
#endif
/* Prepare context */
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx,
mbedtls_cipher_info_from_type(cipher_id)));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx, key->x, 8 * key->len, MBEDTLS_DECRYPT));
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
if (pad_mode != -1) {
TEST_ASSERT(0 == mbedtls_cipher_set_padding_mode(&ctx, pad_mode));
}
#else
(void) pad_mode;
#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
TEST_ASSERT(0 == mbedtls_cipher_set_iv(&ctx, iv->x, iv->len));
TEST_ASSERT(0 == mbedtls_cipher_reset(&ctx));
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
int expected = (ctx.cipher_info->mode == MBEDTLS_MODE_GCM ||
ctx.cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) ?
0 : MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
TEST_EQUAL(expected, mbedtls_cipher_update_ad(&ctx, ad->x, ad->len));
#endif
/* decode buffer and check tag->x */
total_len = 0;
TEST_ASSERT(0 == mbedtls_cipher_update(&ctx, cipher->x, cipher->len, output, &outlen));
total_len += outlen;
TEST_ASSERT(finish_result == mbedtls_cipher_finish(&ctx, output + outlen,
&outlen));
total_len += outlen;
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
int tag_expected = (ctx.cipher_info->mode == MBEDTLS_MODE_GCM ||
ctx.cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305) ?
tag_result : MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
TEST_EQUAL(tag_expected, mbedtls_cipher_check_tag(&ctx, tag->x, tag->len));
#endif
/* check plaintext only if everything went fine */
if (0 == finish_result && 0 == tag_result) {
TEST_ASSERT(total_len == clear->len);
TEST_ASSERT(0 == memcmp(output, clear->x, clear->len));
}
exit:
mbedtls_cipher_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_AUTH_CRYPT */
void auth_crypt_tv(int cipher_id, data_t *key, data_t *iv,
data_t *ad, data_t *cipher, data_t *tag,
char *result, data_t *clear, int use_psa)
{
/*
* Take an AEAD ciphertext + tag and perform a pair
* of AEAD decryption and AEAD encryption. Check that
* this results in the expected plaintext, and that
* decryption and encryption are inverse to one another.
*/
int ret;
int using_nist_kw, using_nist_kw_padding;
mbedtls_cipher_context_t ctx;
size_t outlen;
unsigned char *cipher_plus_tag = NULL;
size_t cipher_plus_tag_len;
unsigned char *decrypt_buf = NULL;
size_t decrypt_buf_len = 0;
unsigned char *encrypt_buf = NULL;
size_t encrypt_buf_len = 0;
/* Null pointers are documented as valid for inputs of length 0.
* The test framework passes non-null pointers, so set them to NULL.
* key, cipher and tag can't be empty. */
if (iv->len == 0) {
iv->x = NULL;
}
if (ad->len == 0) {
ad->x = NULL;
}
if (clear->len == 0) {
clear->x = NULL;
}
mbedtls_cipher_init(&ctx);
/* Initialize PSA Crypto */
#if defined(MBEDTLS_USE_PSA_CRYPTO)
if (use_psa == 1) {
PSA_ASSERT(psa_crypto_init());
}
#else
(void) use_psa;
#endif
/*
* Are we using NIST_KW? with padding?
*/
using_nist_kw_padding = cipher_id == MBEDTLS_CIPHER_AES_128_KWP ||
cipher_id == MBEDTLS_CIPHER_AES_192_KWP ||
cipher_id == MBEDTLS_CIPHER_AES_256_KWP;
using_nist_kw = cipher_id == MBEDTLS_CIPHER_AES_128_KW ||
cipher_id == MBEDTLS_CIPHER_AES_192_KW ||
cipher_id == MBEDTLS_CIPHER_AES_256_KW ||
using_nist_kw_padding;
/*
* Prepare context for decryption
*/
if (!cipher_reset_key(&ctx, cipher_id, use_psa, tag->len, key,
MBEDTLS_DECRYPT)) {
goto exit;
}
/*
* prepare buffer for decryption
* (we need the tag appended to the ciphertext)
*/
cipher_plus_tag_len = cipher->len + tag->len;
TEST_CALLOC(cipher_plus_tag, cipher_plus_tag_len);
memcpy(cipher_plus_tag, cipher->x, cipher->len);
memcpy(cipher_plus_tag + cipher->len, tag->x, tag->len);
/*
* Compute length of output buffer according to the documentation
*/
if (using_nist_kw) {
decrypt_buf_len = cipher_plus_tag_len - 8;
} else {
decrypt_buf_len = cipher_plus_tag_len - tag->len;
}
/*
* Try decrypting to a buffer that's 1B too small
*/
if (decrypt_buf_len != 0) {
TEST_CALLOC(decrypt_buf, decrypt_buf_len - 1);
outlen = 0;
ret = mbedtls_cipher_auth_decrypt_ext(&ctx, iv->x, iv->len,
ad->x, ad->len, cipher_plus_tag, cipher_plus_tag_len,
decrypt_buf, decrypt_buf_len - 1, &outlen, tag->len);
TEST_ASSERT(ret == MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA);
mbedtls_free(decrypt_buf);
decrypt_buf = NULL;
}
/*
* Authenticate and decrypt, and check result
*/
TEST_CALLOC(decrypt_buf, decrypt_buf_len);
outlen = 0;
ret = mbedtls_cipher_auth_decrypt_ext(&ctx, iv->x, iv->len,
ad->x, ad->len, cipher_plus_tag, cipher_plus_tag_len,
decrypt_buf, decrypt_buf_len, &outlen, tag->len);
if (strcmp(result, "FAIL") == 0) {
TEST_ASSERT(ret == MBEDTLS_ERR_CIPHER_AUTH_FAILED);
TEST_ASSERT(buffer_is_all_zero(decrypt_buf, decrypt_buf_len));
} else {
TEST_ASSERT(ret == 0);
TEST_MEMORY_COMPARE(decrypt_buf, outlen, clear->x, clear->len);
}
mbedtls_free(decrypt_buf);
decrypt_buf = NULL;
/*
* Encrypt back if test data was authentic
*/
if (strcmp(result, "FAIL") != 0) {
/* prepare context for encryption */
if (!cipher_reset_key(&ctx, cipher_id, use_psa, tag->len, key,
MBEDTLS_ENCRYPT)) {
goto exit;
}
/*
* Compute size of output buffer according to documentation
*/
if (using_nist_kw) {
encrypt_buf_len = clear->len + 8;
if (using_nist_kw_padding && encrypt_buf_len % 8 != 0) {
encrypt_buf_len += 8 - encrypt_buf_len % 8;
}
} else {
encrypt_buf_len = clear->len + tag->len;
}
/*
* Try encrypting with an output buffer that's 1B too small
*/
TEST_CALLOC(encrypt_buf, encrypt_buf_len - 1);
outlen = 0;
ret = mbedtls_cipher_auth_encrypt_ext(&ctx, iv->x, iv->len,
ad->x, ad->len, clear->x, clear->len,
encrypt_buf, encrypt_buf_len - 1, &outlen, tag->len);
TEST_ASSERT(ret != 0);
mbedtls_free(encrypt_buf);
encrypt_buf = NULL;
/*
* Encrypt and check the result
*/
TEST_CALLOC(encrypt_buf, encrypt_buf_len);
outlen = 0;
ret = mbedtls_cipher_auth_encrypt_ext(&ctx, iv->x, iv->len,
ad->x, ad->len, clear->x, clear->len,
encrypt_buf, encrypt_buf_len, &outlen, tag->len);
TEST_ASSERT(ret == 0);
TEST_ASSERT(outlen == cipher->len + tag->len);
TEST_ASSERT(memcmp(encrypt_buf, cipher->x, cipher->len) == 0);
TEST_ASSERT(memcmp(encrypt_buf + cipher->len,
tag->x, tag->len) == 0);
mbedtls_free(encrypt_buf);
encrypt_buf = NULL;
}
exit:
mbedtls_cipher_free(&ctx);
mbedtls_free(decrypt_buf);
mbedtls_free(encrypt_buf);
mbedtls_free(cipher_plus_tag);
#if defined(MBEDTLS_USE_PSA_CRYPTO)
if (use_psa == 1) {
PSA_DONE();
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
}
/* END_CASE */
/* BEGIN_CASE */
void test_vec_ecb(int cipher_id, int operation, data_t *key,
data_t *input, data_t *result, int finish_result
)
{
mbedtls_cipher_context_t ctx;
unsigned char output[32];
size_t outlen;
mbedtls_cipher_init(&ctx);
memset(output, 0x00, sizeof(output));
/* Prepare context */
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx,
mbedtls_cipher_info_from_type(cipher_id)));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx, key->x, 8 * key->len, operation));
TEST_ASSERT(0 == mbedtls_cipher_update(&ctx, input->x,
mbedtls_cipher_get_block_size(&ctx),
output, &outlen));
TEST_ASSERT(outlen == mbedtls_cipher_get_block_size(&ctx));
TEST_ASSERT(finish_result == mbedtls_cipher_finish(&ctx, output + outlen,
&outlen));
TEST_ASSERT(0 == outlen);
/* check plaintext only if everything went fine */
if (0 == finish_result) {
TEST_ASSERT(0 == memcmp(output, result->x,
mbedtls_cipher_get_block_size(&ctx)));
}
exit:
mbedtls_cipher_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_WITH_PADDING */
void test_vec_crypt(int cipher_id, int operation, data_t *key,
data_t *iv, data_t *input, data_t *result,
int finish_result, int use_psa)
{
mbedtls_cipher_context_t ctx;
unsigned char output[32];
size_t outlen;
mbedtls_cipher_init(&ctx);
memset(output, 0x00, sizeof(output));
/* Prepare context */
#if !defined(MBEDTLS_USE_PSA_CRYPTO) || !defined(MBEDTLS_TEST_DEPRECATED)
(void) use_psa;
#else
if (use_psa == 1) {
PSA_ASSERT(psa_crypto_init());
TEST_ASSERT(0 == mbedtls_cipher_setup_psa(&ctx,
mbedtls_cipher_info_from_type(cipher_id), 0));
} else
#endif /* !MBEDTLS_USE_PSA_CRYPTO || !MBEDTLS_TEST_DEPRECATED*/
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx,
mbedtls_cipher_info_from_type(cipher_id)));
TEST_ASSERT(0 == mbedtls_cipher_setkey(&ctx, key->x, 8 * key->len, operation));
if (MBEDTLS_MODE_CBC == ctx.cipher_info->mode) {
TEST_ASSERT(0 == mbedtls_cipher_set_padding_mode(&ctx, MBEDTLS_PADDING_NONE));
}
TEST_ASSERT(finish_result == mbedtls_cipher_crypt(&ctx, iv->len ? iv->x : NULL,
iv->len, input->x, input->len,
output, &outlen));
TEST_ASSERT(result->len == outlen);
/* check plaintext only if everything went fine */
if (0 == finish_result) {
TEST_ASSERT(0 == memcmp(output, result->x, outlen));
}
exit:
mbedtls_cipher_free(&ctx);
#if defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_TEST_DEPRECATED)
PSA_DONE();
#endif /* MBEDTLS_USE_PSA_CRYPTO && MBEDTLS_TEST_DEPRECATED */
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_WITH_PADDING */
void set_padding(int cipher_id, int pad_mode, int ret)
{
const mbedtls_cipher_info_t *cipher_info;
mbedtls_cipher_context_t ctx;
mbedtls_cipher_init(&ctx);
cipher_info = mbedtls_cipher_info_from_type(cipher_id);
TEST_ASSERT(NULL != cipher_info);
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx, cipher_info));
TEST_ASSERT(ret == mbedtls_cipher_set_padding_mode(&ctx, pad_mode));
exit:
mbedtls_cipher_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CBC */
void check_padding(int pad_mode, data_t *input, int ret, int dlen_check
)
{
mbedtls_cipher_info_t cipher_info;
mbedtls_cipher_context_t ctx;
size_t dlen;
/* build a fake context just for getting access to get_padding */
mbedtls_cipher_init(&ctx);
cipher_info.mode = MBEDTLS_MODE_CBC;
ctx.cipher_info = &cipher_info;
TEST_ASSERT(0 == mbedtls_cipher_set_padding_mode(&ctx, pad_mode));
TEST_ASSERT(ret == ctx.get_padding(input->x, input->len, &dlen));
if (0 == ret) {
TEST_ASSERT(dlen == (size_t) dlen_check);
}
}
/* END_CASE */
/* BEGIN_CASE */
void iv_len_validity(int cipher_id, char *cipher_string,
int iv_len_val, int ret)
{
size_t iv_len = iv_len_val;
unsigned char iv[16];
/* Initialise iv buffer */
memset(iv, 0, sizeof(iv));
const mbedtls_cipher_info_t *cipher_info;
mbedtls_cipher_context_t ctx_dec;
mbedtls_cipher_context_t ctx_enc;
/*
* Prepare contexts
*/
mbedtls_cipher_init(&ctx_dec);
mbedtls_cipher_init(&ctx_enc);
/* Check and get info structures */
cipher_info = mbedtls_cipher_info_from_type(cipher_id);
TEST_ASSERT(NULL != cipher_info);
TEST_ASSERT(mbedtls_cipher_info_from_string(cipher_string) == cipher_info);
TEST_ASSERT(strcmp(mbedtls_cipher_info_get_name(cipher_info),
cipher_string) == 0);
/* Initialise enc and dec contexts */
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx_dec, cipher_info));
TEST_ASSERT(0 == mbedtls_cipher_setup(&ctx_enc, cipher_info));
TEST_ASSERT(ret == mbedtls_cipher_set_iv(&ctx_dec, iv, iv_len));
TEST_ASSERT(ret == mbedtls_cipher_set_iv(&ctx_enc, iv, iv_len));
exit:
mbedtls_cipher_free(&ctx_dec);
mbedtls_cipher_free(&ctx_enc);
}
/* END_CASE */
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