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Add param validation for mbedtls_aes_crypt_cbc()

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This commit is contained in:
Manuel Pégourié-Gonnard 2018-12-12 13:05:00 +01:00
parent 1aca260571
commit 3178d1a997
4 changed files with 56 additions and 7 deletions
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6
include/mbedtls/aes.h
View file

@ -275,7 +275,7 @@ int mbedtls_aes_crypt_ecb( mbedtls_aes_context *ctx,
* mbedtls_aes_setkey_enc() or mbedtls_aes_setkey_dec() must be called
* before the first call to this API with the same context.
*
* \note This function operates on aligned blocks, that is, the input size
* \note This function operates on full blocks, that is, the input size
* must be a multiple of the AES block size of 16 Bytes.
*
* \note Upon exit, the content of the IV is updated so that you can
@ -287,13 +287,17 @@ int mbedtls_aes_crypt_ecb( mbedtls_aes_context *ctx,
*
*
* \param ctx The AES context to use for encryption or decryption.
* It must be initialized and bound to a key.
* \param mode The AES operation: #MBEDTLS_AES_ENCRYPT or
* #MBEDTLS_AES_DECRYPT.
* \param length The length of the input data in Bytes. This must be a
* multiple of the block size (16 Bytes).
* \param iv Initialization vector (updated after use).
* It must be a readable and writeable buffer of 16 Bytes.
* \param input The buffer holding the input data.
* It must be readable and of size \p length.
* \param output The buffer holding the output data.
* It must be writeable and of size \p length.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH

8
library/aes.c
View file

@ -1049,6 +1049,14 @@ int mbedtls_aes_crypt_cbc( mbedtls_aes_context *ctx,
int i;
unsigned char temp[16];
AES_VALIDATE_RET( ctx != NULL );
AES_VALIDATE_RET( mode == MBEDTLS_AES_ENCRYPT ||
mode == MBEDTLS_AES_DECRYPT );
AES_VALIDATE_RET( iv != NULL );
AES_VALIDATE_RET( input != NULL );
AES_VALIDATE_RET( output != NULL );
if( length % 16 )
return( MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH );

41
tests/suites/test_suite_aes.function
View file

@ -372,7 +372,7 @@ exit:
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_CHECK_PARAMS:!MBEDTLS_PARAM_FAILED_ALT */
void aes_invalid_param( )
void aes_check_params( )
{
mbedtls_aes_context aes_ctx;
#if defined(MBEDTLS_CIPHER_MODE_XTS)
@ -422,17 +422,54 @@ void aes_invalid_param( )
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
mbedtls_aes_crypt_ecb( &aes_ctx,
MBEDTLS_AES_ENCRYPT, in, NULL ) );
#if defined(MBEDTLS_CIPHER_MODE_CBC)
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
mbedtls_aes_crypt_cbc( NULL,
MBEDTLS_AES_ENCRYPT, 16,
out, in, out ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
mbedtls_aes_crypt_cbc( &aes_ctx,
42, 16,
out, in, out ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
mbedtls_aes_crypt_cbc( &aes_ctx,
MBEDTLS_AES_ENCRYPT, 16,
NULL, in, out ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
mbedtls_aes_crypt_cbc( &aes_ctx,
MBEDTLS_AES_ENCRYPT, 16,
out, NULL, out ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
mbedtls_aes_crypt_cbc( &aes_ctx,
MBEDTLS_AES_ENCRYPT, 16,
out, in, NULL ) );
#endif /* MBEDTLS_CIPHER_MODE_CBC */
}
/* END_CASE */
/* BEGIN_CASE */
void aes_valid_param( )
void aes_misc_params( )
{
mbedtls_aes_context aes_ctx;
const unsigned char in[16] = { 0 };
unsigned char out[16];
/* These calls accept NULL */
TEST_VALID_PARAM( mbedtls_aes_free( NULL ) );
#if defined(MBEDTLS_CIPHER_MODE_XTS)
TEST_VALID_PARAM( mbedtls_aes_xts_free( NULL ) );
#endif
#if defined(MBEDTLS_CIPHER_MODE_CBC)
TEST_ASSERT( mbedtls_aes_crypt_cbc( &aes_ctx, MBEDTLS_AES_ENCRYPT,
15, out, in, out )
== MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH );
TEST_ASSERT( mbedtls_aes_crypt_cbc( &aes_ctx, MBEDTLS_AES_ENCRYPT,
17, out, in, out )
== MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH );
#endif
}
/* END_CASE */

8
tests/suites/test_suite_aes.rest.data
View file

@ -10,11 +10,11 @@ aes_encrypt_cbc:"000000000000000000000000000000000000000000000000000000000000000
AES-256-CBC Decrypt (Invalid input length)
aes_decrypt_cbc:"0000000000000000000000000000000000000000000000000000000000000000":"00000000000000000000000000000000":"623a52fcea5d443e48d9181ab32c74":"":MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH
AES - Invalid parameters
aes_invalid_param:
AES - Optional Parameter Validation (MBEDTLS_CHECK_PARAMS)
aes_check_params:
AES - Valid parameters
aes_valid_param:
AES - Mandatory Parameter Validation and Valid Parameters
aes_misc_params:
AES Selftest
depends_on:MBEDTLS_SELF_TEST