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/* BEGIN_HEADER */
#include "mbedtls/chachapoly.h"
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_CHACHAPOLY_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void mbedtls_chachapoly_enc(data_t *key_str,
data_t *nonce_str,
data_t *aad_str,
data_t *input_str,
data_t *output_str,
data_t *mac_str)
{
unsigned char output[265];
unsigned char mac[16]; /* size set by the standard */
mbedtls_chachapoly_context ctx;
TEST_ASSERT(key_str->len == 32);
TEST_ASSERT(nonce_str->len == 12);
TEST_ASSERT(mac_str->len == 16);
mbedtls_chachapoly_init(&ctx);
TEST_ASSERT(mbedtls_chachapoly_setkey(&ctx, key_str->x) == 0);
TEST_ASSERT(mbedtls_chachapoly_encrypt_and_tag(&ctx,
input_str->len, nonce_str->x,
aad_str->x, aad_str->len,
input_str->x, output, mac) == 0);
TEST_ASSERT(memcmp(output_str->x, output, output_str->len) == 0);
TEST_ASSERT(memcmp(mac_str->x, mac, 16U) == 0);
exit:
mbedtls_chachapoly_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE */
void mbedtls_chachapoly_dec(data_t *key_str,
data_t *nonce_str,
data_t *aad_str,
data_t *input_str,
data_t *output_str,
data_t *mac_str,
int ret_exp)
{
unsigned char output[265];
int ret;
mbedtls_chachapoly_context ctx;
TEST_ASSERT(key_str->len == 32);
TEST_ASSERT(nonce_str->len == 12);
TEST_ASSERT(mac_str->len == 16);
mbedtls_chachapoly_init(&ctx);
TEST_ASSERT(mbedtls_chachapoly_setkey(&ctx, key_str->x) == 0);
ret = mbedtls_chachapoly_auth_decrypt(&ctx,
input_str->len, nonce_str->x,
aad_str->x, aad_str->len,
mac_str->x, input_str->x, output);
TEST_ASSERT(ret == ret_exp);
if (ret_exp == 0) {
TEST_ASSERT(memcmp(output_str->x, output, output_str->len) == 0);
}
exit:
mbedtls_chachapoly_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE */
void chachapoly_state()
{
unsigned char key[32];
unsigned char nonce[12];
unsigned char aad[1];
unsigned char input[1];
unsigned char output[1];
unsigned char mac[16];
size_t input_len = sizeof(input);
size_t aad_len = sizeof(aad);
mbedtls_chachapoly_context ctx;
memset(key, 0x00, sizeof(key));
memset(nonce, 0x00, sizeof(nonce));
memset(aad, 0x00, sizeof(aad));
memset(input, 0x00, sizeof(input));
memset(output, 0x00, sizeof(output));
memset(mac, 0x00, sizeof(mac));
/* Initial state: finish, update, update_aad forbidden */
mbedtls_chachapoly_init(&ctx);
TEST_ASSERT(mbedtls_chachapoly_finish(&ctx, mac)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
TEST_ASSERT(mbedtls_chachapoly_update(&ctx, input_len, input, output)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
TEST_ASSERT(mbedtls_chachapoly_update_aad(&ctx, aad, aad_len)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
/* Still initial state: finish, update, update_aad forbidden */
TEST_ASSERT(mbedtls_chachapoly_setkey(&ctx, key)
== 0);
TEST_ASSERT(mbedtls_chachapoly_finish(&ctx, mac)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
TEST_ASSERT(mbedtls_chachapoly_update(&ctx, input_len, input, output)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
TEST_ASSERT(mbedtls_chachapoly_update_aad(&ctx, aad, aad_len)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
/* Starts -> finish OK */
TEST_ASSERT(mbedtls_chachapoly_starts(&ctx, nonce, MBEDTLS_CHACHAPOLY_ENCRYPT)
== 0);
TEST_ASSERT(mbedtls_chachapoly_finish(&ctx, mac)
== 0);
/* After finish: update, update_aad forbidden */
TEST_ASSERT(mbedtls_chachapoly_update(&ctx, input_len, input, output)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
TEST_ASSERT(mbedtls_chachapoly_update_aad(&ctx, aad, aad_len)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
/* Starts -> update* OK */
TEST_ASSERT(mbedtls_chachapoly_starts(&ctx, nonce, MBEDTLS_CHACHAPOLY_ENCRYPT)
== 0);
TEST_ASSERT(mbedtls_chachapoly_update(&ctx, input_len, input, output)
== 0);
TEST_ASSERT(mbedtls_chachapoly_update(&ctx, input_len, input, output)
== 0);
/* After update: update_aad forbidden */
TEST_ASSERT(mbedtls_chachapoly_update_aad(&ctx, aad, aad_len)
== MBEDTLS_ERR_CHACHAPOLY_BAD_STATE);
/* Starts -> update_aad* -> finish OK */
TEST_ASSERT(mbedtls_chachapoly_starts(&ctx, nonce, MBEDTLS_CHACHAPOLY_ENCRYPT)
== 0);
TEST_ASSERT(mbedtls_chachapoly_update_aad(&ctx, aad, aad_len)
== 0);
TEST_ASSERT(mbedtls_chachapoly_update_aad(&ctx, aad, aad_len)
== 0);
TEST_ASSERT(mbedtls_chachapoly_finish(&ctx, mac)
== 0);
exit:
mbedtls_chachapoly_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
void chachapoly_selftest()
{
TEST_ASSERT(mbedtls_chachapoly_self_test(1) == 0);
}
/* END_CASE */
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