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md: improve parameter validation

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Provide consistent checks for input and output parameters
Improve documentation
Expand the md test suite to test more cases
This commit is contained in:
Andrzej Kurek 2018-12-28 05:14:19 -05:00
parent 75a9f0fa7f
commit 02791ad8be
3 changed files with 172 additions and 88 deletions
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60
include/mbedtls/md.h
View File

@ -109,7 +109,8 @@ const int *mbedtls_md_list( void );
* \brief This function returns the message-digest information
* associated with the given digest name.
*
* \param md_name The name of the digest to search for. This must not be \c NULL.
* \param md_name The name of the digest to search for. This must point to
* a NULL-terminated string.
*
* \return The message-digest information associated with \p md_name.
* \return NULL if the associated message-digest information is not found.
@ -120,7 +121,7 @@ const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name );
* \brief This function returns the message-digest information
* associated with the given digest type.
*
* \param md_type The type of digest to search for. This must not be \c NULL.
* \param md_type The type of digest to search for.
*
* \return The message-digest information associated with \p md_type.
* \return NULL if the associated message-digest information is not found.
@ -133,7 +134,10 @@ const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type );
*
* This function should always be called first. It prepares the
* context for mbedtls_md_setup() for binding it to a
* message-digest algorithm. The \p ctx must not be \c NULL.
* message-digest algorithm.
*
* \param ctx The context to initialize. This must not be \c NULL.
*
*/
void mbedtls_md_init( mbedtls_md_context_t *ctx );
@ -148,7 +152,7 @@ void mbedtls_md_init( mbedtls_md_context_t *ctx );
* Calling this function if you have previously
* called mbedtls_md_init() and nothing else is optional.
* You must not call this function if you have not called
* mbedtls_md_init(). The \p ctx must not be \c NULL.
* mbedtls_md_init().
*/
void mbedtls_md_free( mbedtls_md_context_t *ctx );
@ -280,7 +284,9 @@ int mbedtls_md_starts( mbedtls_md_context_t *ctx );
* Afterwards, call mbedtls_md_finish().
*
* \param ctx The generic message-digest context.
* \param input The buffer holding the input data. This must not be \c NULL.
* \param input The buffer holding the input data. This must be a readable
* buffer of length \p ilen Bytes. It may be \c NULL if
* \p ilen is zero.
* \param ilen The length of the input data.
*
* \return \c 0 on success.
@ -302,7 +308,9 @@ int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, si
*
* \param ctx The generic message-digest context.
* \param output The buffer for the generic message-digest checksum result.
* This must not be \c NULL.
* This must be a writable buffer large enough to hold the
* message-digest. You may use mbedtls_md_get_size() to obtain
* the message-digest size for a particular algorithm.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
@ -320,10 +328,14 @@ int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output );
*
* \param md_info The information structure of the message-digest algorithm
* to use. This must not be \c NULL.
* \param input The buffer holding the data.
* \param input The buffer holding the data. This must be a readable
* buffer of length \p ilen Bytes. It may be \c NULL if
* \p ilen is zero.
* \param ilen The length of the input data.
* \param output The generic message-digest checksum result.
* This must not be \c NULL.
* This must be a writable buffer large enough to hold the
* message-digest. You may use mbedtls_md_get_size() to obtain
* the message-digest size for a particular algorithm.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
@ -342,9 +354,11 @@ int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, si
*
* \param md_info The information structure of the message-digest algorithm
* to use. This must not be \c NULL.
* \param path The input file name. This must not be \c NULL.
* \param path The input file name. This must be a NULL-terminated string.
* \param output The generic message-digest checksum result.
* This must not be \c NULL.
* This must be a writable buffer large enough to hold the
* message-digest. You may use mbedtls_md_get_size() to obtain
* the message-digest size for a particular algorithm.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_MD_FILE_IO_ERROR on an I/O error accessing
@ -366,7 +380,9 @@ int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path,
*
* \param ctx The message digest context containing an embedded HMAC
* context.
* \param key The HMAC secret key. This must not be \c NULL.
* \param key The HMAC secret key. This must be a readable buffer of
* length \p keylen Bytes. It may be \c NULL if
* \p keylen is zero.
* \param keylen The length of the HMAC key in Bytes.
*
* \return \c 0 on success.
@ -388,7 +404,9 @@ int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
*
* \param ctx The message digest context containing an embedded HMAC
* context.
* \param input The buffer holding the input data.
* \param input The buffer holding the input data. This must be a readable
* buffer of length \p ilen Bytes. It may be \c NULL if
* \p ilen is zero.
* \param ilen The length of the input data.
*
* \return \c 0 on success.
@ -410,7 +428,10 @@ int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *inpu
*
* \param ctx The message digest context containing an embedded HMAC
* context.
* \param output The generic HMAC checksum result. This must not be \c NULL.
* \param output The generic HMAC checksum result. This must be a writable
* buffer large enough to hold the message-digest. You may
* use mbedtls_md_get_size() to obtain the message-digest
* size for a particular algorithm.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
@ -447,11 +468,18 @@ int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx );
*
* \param md_info The information structure of the message-digest algorithm
* to use. This must not be \c NULL.
* \param key The HMAC secret key. This must not be \c NULL.
* \param key The HMAC secret key. This must be a readable buffer of
* length \p keylen Bytes. It may be \c NULL if
* \p keylen is zero.
* \param keylen The length of the HMAC secret key in Bytes.
* \param input The buffer holding the input data.
* \param input The buffer holding the input data. This must be a readable
* buffer of length \p ilen Bytes. It may be \c NULL if
* \p ilen is zero.
* \param ilen The length of the input data.
* \param output The generic HMAC result. This must not be \c NULL.
* \param output The generic HMAC result. This must be a writable
* buffer large enough to hold the message-digest. You may
* use mbedtls_md_get_size() to obtain the message-digest
* size for a particular algorithm.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification

94
library/md.c
View File

@ -49,11 +49,11 @@
#include <stdio.h>
#endif
#define MBEDTLS_MD_VALIDATE_RET(cond) \
#define MD_VALIDATE_RET(cond) \
MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_MD_BAD_INPUT_DATA )
#define MBEDTLS_MD_VALIDATE_RET_NULL(cond) \
#define MD_VALIDATE_RET_NULL(cond) \
MBEDTLS_INTERNAL_VALIDATE_RET( cond, NULL )
#define MBEDTLS_MD_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE( cond )
#define MD_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE( cond )
/*
* Reminder: update profiles in x509_crt.c when adding a new hash!
@ -100,7 +100,7 @@ const int *mbedtls_md_list( void )
const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name )
{
MBEDTLS_MD_VALIDATE_RET_NULL( md_name != NULL );
MD_VALIDATE_RET_NULL( md_name != NULL );
/* Get the appropriate digest information */
#if defined(MBEDTLS_MD2_C)
@ -181,7 +181,7 @@ const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type )
void mbedtls_md_init( mbedtls_md_context_t *ctx )
{
MBEDTLS_MD_VALIDATE( ctx != NULL );
MD_VALIDATE( ctx != NULL );
memset( ctx, 0, sizeof( mbedtls_md_context_t ) );
}
@ -206,11 +206,11 @@ void mbedtls_md_free( mbedtls_md_context_t *ctx )
int mbedtls_md_clone( mbedtls_md_context_t *dst,
const mbedtls_md_context_t *src )
{
MBEDTLS_MD_VALIDATE_RET( dst != NULL );
MBEDTLS_MD_VALIDATE_RET( src != NULL );
MBEDTLS_MD_VALIDATE_RET( dst->md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( src->md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( dst->md_info == src->md_info );
MD_VALIDATE_RET( dst != NULL );
MD_VALIDATE_RET( src != NULL );
MD_VALIDATE_RET( dst->md_info != NULL );
MD_VALIDATE_RET( src->md_info != NULL );
MD_VALIDATE_RET( dst->md_info == src->md_info );
dst->md_info->clone_func( dst->md_ctx, src->md_ctx );
@ -226,8 +226,8 @@ int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_
int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac )
{
MBEDTLS_MD_VALIDATE_RET( md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( md_info != NULL );
MD_VALIDATE_RET( ctx != NULL );
if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
return( MBEDTLS_ERR_MD_ALLOC_FAILED );
@ -249,26 +249,26 @@ int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_inf
int mbedtls_md_starts( mbedtls_md_context_t *ctx )
{
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->md_info != NULL );
MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( ctx->md_info != NULL );
return( ctx->md_info->starts_func( ctx->md_ctx ) );
}
int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
{
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( input != NULL );
MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( ctx->md_info != NULL );
MD_VALIDATE_RET( ilen == 0 || input != NULL );
return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) );
}
int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
{
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( output != NULL );
MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( ctx->md_info != NULL );
MD_VALIDATE_RET( output != NULL );
return( ctx->md_info->finish_func( ctx->md_ctx, output ) );
}
@ -276,8 +276,9 @@ int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
unsigned char *output )
{
MBEDTLS_MD_VALIDATE_RET( md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( output != NULL );
MD_VALIDATE_RET( md_info != NULL );
MD_VALIDATE_RET( ilen == 0 || input != NULL );
MD_VALIDATE_RET( output != NULL );
return( md_info->digest_func( input, ilen, output ) );
}
@ -291,9 +292,9 @@ int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigne
mbedtls_md_context_t ctx;
unsigned char buf[1024];
MBEDTLS_MD_VALIDATE_RET( md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( path != NULL );
MBEDTLS_MD_VALIDATE_RET( output != NULL );
MD_VALIDATE_RET( md_info != NULL );
MD_VALIDATE_RET( path != NULL );
MD_VALIDATE_RET( output != NULL );
if( ( f = fopen( path, "rb" ) ) == NULL )
return( MBEDTLS_ERR_MD_FILE_IO_ERROR );
@ -331,10 +332,10 @@ int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
unsigned char *ipad, *opad;
size_t i;
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->hmac_ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( key != NULL );
MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( ctx->md_info != NULL );
MD_VALIDATE_RET( ctx->hmac_ctx != NULL );
MD_VALIDATE_RET( keylen == 0 || key != NULL );
if( keylen > (size_t) ctx->md_info->block_size )
{
@ -375,9 +376,10 @@ cleanup:
int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
{
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->hmac_ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->md_info != NULL );
MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( ilen == 0 || input != NULL );
MD_VALIDATE_RET( ctx->hmac_ctx != NULL );
MD_VALIDATE_RET( ctx->md_info != NULL );
return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) );
}
@ -388,10 +390,10 @@ int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
unsigned char *opad;
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->hmac_ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( output != NULL );
MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( ctx->hmac_ctx != NULL );
MD_VALIDATE_RET( ctx->md_info != NULL );
MD_VALIDATE_RET( output != NULL );
opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
@ -413,9 +415,9 @@ int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
int ret;
unsigned char *ipad;
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->hmac_ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->md_info != NULL );
MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( ctx->hmac_ctx != NULL );
MD_VALIDATE_RET( ctx->md_info != NULL );
ipad = (unsigned char *) ctx->hmac_ctx;
@ -433,9 +435,10 @@ int mbedtls_md_hmac( const mbedtls_md_info_t *md_info,
mbedtls_md_context_t ctx;
int ret;
MBEDTLS_MD_VALIDATE_RET( md_info != NULL );
MBEDTLS_MD_VALIDATE_RET( key != NULL );
MBEDTLS_MD_VALIDATE_RET( output != NULL );
MD_VALIDATE_RET( md_info != NULL );
MD_VALIDATE_RET( keylen == 0 || key != NULL );
MD_VALIDATE_RET( ilen == 0 || input != NULL );
MD_VALIDATE_RET( output != NULL );
mbedtls_md_init( &ctx );
@ -457,8 +460,9 @@ cleanup:
int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
{
MBEDTLS_MD_VALIDATE_RET( ctx != NULL );
MBEDTLS_MD_VALIDATE_RET( ctx->md_info != NULL );
MD_VALIDATE_RET( ctx != NULL );
MD_VALIDATE_RET( data != NULL );
MD_VALIDATE_RET( ctx->md_info != NULL );
return( ctx->md_info->process_func( ctx->md_ctx, data ) );
}
@ -479,7 +483,7 @@ mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info )
const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info )
{
MBEDTLS_MD_VALIDATE_RET_NULL( md_info != NULL );
MD_VALIDATE_RET_NULL( md_info != NULL );
return md_info->name;
}

106
tests/suites/test_suite_md.function
View File

@ -43,51 +43,103 @@ exit:
void md_null_args( )
{
mbedtls_md_context_t ctx;
mbedtls_md_context_t good_ctx;
const mbedtls_md_info_t *info = mbedtls_md_info_from_type( *( mbedtls_md_list() ) );
unsigned char buf[1] = { 0 };
mbedtls_md_init( &ctx );
mbedtls_md_init( &good_ctx );
TEST_ASSERT( 0 == mbedtls_md_setup( &good_ctx, info, 0 ) );
TEST_INVALID_PARAM_RET( 0,
mbedtls_md_get_size( NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_MD_NONE,
mbedtls_md_get_type( NULL ) );
TEST_INVALID_PARAM_RET( NULL,
mbedtls_md_get_name( NULL ) );
TEST_INVALID_PARAM( mbedtls_md_get_size( NULL ) );
TEST_INVALID_PARAM( mbedtls_md_get_type( NULL ) );
TEST_INVALID_PARAM( mbedtls_md_get_name( NULL ) );
TEST_INVALID_PARAM_RET( NULL,
mbedtls_md_info_from_string( NULL ) );
TEST_INVALID_PARAM( mbedtls_md_info_from_string( NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_setup( &ctx, NULL, 0 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_setup( NULL, info, 0 ) );
TEST_INVALID_PARAM( mbedtls_md_setup( &ctx, NULL, 0 ) );
TEST_INVALID_PARAM( mbedtls_md_setup( NULL, info, 0 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_starts( NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_starts( &ctx ) );
TEST_INVALID_PARAM( mbedtls_md_starts( NULL ) );
TEST_INVALID_PARAM( mbedtls_md_starts( &ctx ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_update( NULL, buf, 1 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_update( &ctx, buf, 1 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_update( &good_ctx, NULL, 1 ) );
TEST_INVALID_PARAM( mbedtls_md_update( NULL, buf, 1 ) );
TEST_INVALID_PARAM( mbedtls_md_update( &ctx, buf, 1 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_finish( NULL, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_finish( &ctx, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_finish( &ctx, NULL ) );
TEST_INVALID_PARAM( mbedtls_md_finish( NULL, buf ) );
TEST_INVALID_PARAM( mbedtls_md_finish( &ctx, buf ) );
TEST_INVALID_PARAM( mbedtls_md( NULL, buf, 1, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md( NULL, buf, 1, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md( info, NULL, 1, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md( info, buf, 1, NULL ) );
#if defined(MBEDTLS_FS_IO)
TEST_INVALID_PARAM( mbedtls_md_file( NULL, "", buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_file( NULL, "", buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_file( info, NULL, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_file( info, "", NULL ) );
#endif
TEST_INVALID_PARAM( mbedtls_md_hmac_starts( NULL, buf, 1 ) );
TEST_INVALID_PARAM( mbedtls_md_hmac_starts( &ctx, buf, 1 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_starts( NULL, buf, 1 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_starts( &ctx, buf, 1 ) );
TEST_INVALID_PARAM( mbedtls_md_hmac_update( NULL, buf, 1 ) );
TEST_INVALID_PARAM( mbedtls_md_hmac_update( &ctx, buf, 1 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_update( NULL, buf, 1 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_update( &ctx, buf, 1 ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_update( &good_ctx, NULL, 1 ) );
TEST_INVALID_PARAM( mbedtls_md_hmac_finish( NULL, buf ) );
TEST_INVALID_PARAM( mbedtls_md_hmac_finish( &ctx, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_finish( NULL, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_finish( &ctx, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_finish( &ctx, NULL ) );
TEST_INVALID_PARAM( mbedtls_md_hmac_reset( NULL ) );
TEST_INVALID_PARAM( mbedtls_md_hmac_reset( &ctx ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_reset( NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac_reset( &ctx ) );
TEST_INVALID_PARAM( mbedtls_md_hmac( NULL, buf, 1, buf, 1, buf ) );
TEST_INVALID_PARAM( mbedtls_md_process( NULL, buf ) );
TEST_INVALID_PARAM( mbedtls_md_process( &ctx, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac( NULL, buf, 1, buf, 1, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac( info, NULL, 1, buf, 1, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac( info, buf, 1, NULL, 1, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_hmac( info, buf, 1, buf, 1, NULL ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_process( NULL, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_process( &ctx, buf ) );
TEST_INVALID_PARAM_RET( MBEDTLS_ERR_MD_BAD_INPUT_DATA,
mbedtls_md_process( &good_ctx, NULL ) );
/* Ok, this is not NULL arg but NULL return... */
TEST_ASSERT( mbedtls_md_info_from_type( MBEDTLS_MD_NONE ) == NULL );