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mbedtls/tests/suites/test_suite_cipher.function
Gilles Peskine dc8ecda46f Don't fail until everything is initialized 
Can't call mbedtls_cipher_free(&invalid_ctx) in cleanup if
mbedtls_cipher_init(&invalid_ctx) hasn't been called.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2021-12-10 14:28:31 +01:00

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/* BEGIN_HEADER */
#include "mbedtls/cipher.h"
#if defined(MBEDTLS_AES_C)
#include "mbedtls/aes.h"
#endif
#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 );
}
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)
(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 */
{
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 depends_on:NOT_DEFINED */
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;
const mbedtls_cipher_info_t *valid_info = mbedtls_cipher_info_from_type(
*( mbedtls_cipher_list() ) );
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
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)
TEST_ASSERT( 0 == mbedtls_cipher_update_ad( &ctx_dec, ad, sizeof( ad ) - i ) );
TEST_ASSERT( 0 == 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_ASSERT( 0 == 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_ASSERT( 0 == 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)
TEST_ASSERT( 0 == 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[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 );
memset( iv , 0, 16 );
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);
TEST_ASSERT( sizeof(key) * 8 >= cipher_info->key_bitlen );
TEST_ASSERT( 0 == mbedtls_cipher_setup( &ctx_dec, cipher_info ) );
TEST_ASSERT( 0 == mbedtls_cipher_setkey( &ctx_dec,
key, cipher_info->key_bitlen,
MBEDTLS_DECRYPT ) );
TEST_ASSERT( 0 == mbedtls_cipher_set_iv( &ctx_dec, iv, 16 ) );
TEST_ASSERT( 0 == mbedtls_cipher_reset( &ctx_dec ) );
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
TEST_ASSERT( 0 == 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_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
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)
TEST_ASSERT( 0 == mbedtls_cipher_update_ad( &ctx_dec, NULL, 0 ) );
TEST_ASSERT( 0 == 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)
TEST_ASSERT( 0 == 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)
TEST_ASSERT( tag_result == 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;
ASSERT_ALLOC( 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 )
{
ASSERT_ALLOC( 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
*/
ASSERT_ALLOC( 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 );
ASSERT_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
*/
ASSERT_ALLOC( 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
*/
ASSERT_ALLOC( 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)
(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 */
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)
PSA_DONE( );
#endif /* MBEDTLS_USE_PSA_CRYPTO */
}
/* 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 */
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