/* BEGIN_HEADER */
#include "mbedtls/md.h"
/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_MD_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void mbedtls_md_process( )
{
    const int *md_type_ptr;
    const mbedtls_md_info_t *info;
    mbedtls_md_context_t ctx;
    unsigned char buf[150];

    mbedtls_md_init( &ctx );

    /*
     * Very minimal testing of mbedtls_md_process, just make sure the various
     * xxx_process_wrap() function pointers are valid. (Testing that they
     * indeed do the right thing whould require messing with the internal
     * state of the underlying mbedtls_md/sha context.)
     *
     * Also tests that mbedtls_md_list() only returns valid MDs.
     */
    for( md_type_ptr = mbedtls_md_list(); *md_type_ptr != 0; md_type_ptr++ )
    {
        info = mbedtls_md_info_from_type( *md_type_ptr );
        TEST_ASSERT( info != NULL );
        TEST_ASSERT( mbedtls_md_setup( &ctx, info, 0 ) == 0 );
        TEST_ASSERT( mbedtls_md_process( &ctx, buf ) == 0 );
        mbedtls_md_free( &ctx );
    }

exit:
    mbedtls_md_free( &ctx );
}
/* END_CASE */

/* BEGIN_CASE */
void md_null_args( )
{
    mbedtls_md_context_t ctx;
    const mbedtls_md_info_t *info = mbedtls_md_info_from_type( *( mbedtls_md_list() ) );
    unsigned char buf[1] = { 0 };

    mbedtls_md_init( &ctx );

    TEST_ASSERT( mbedtls_md_get_size( NULL ) == 0 );
    TEST_ASSERT( mbedtls_md_get_type( NULL ) == MBEDTLS_MD_NONE );
    TEST_ASSERT( mbedtls_md_get_name( NULL ) == NULL );

    TEST_ASSERT( mbedtls_md_info_from_string( NULL ) == NULL );

    TEST_ASSERT( mbedtls_md_setup( &ctx, NULL, 0 ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_setup( NULL, info, 0 ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md_starts( NULL ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_starts( &ctx ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md_update( NULL, buf, 1 ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_update( &ctx, buf, 1 ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md_finish( NULL, buf ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_finish( &ctx, buf ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md( NULL, buf, 1, buf ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

#if defined(MBEDTLS_FS_IO)
    TEST_ASSERT( mbedtls_md_file( NULL, "", buf ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
#endif

    TEST_ASSERT( mbedtls_md_hmac_starts( NULL, buf, 1 )
                 == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_hmac_starts( &ctx, buf, 1 )
                 == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md_hmac_update( NULL, buf, 1 )
                 == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_hmac_update( &ctx, buf, 1 )
                 == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md_hmac_finish( NULL, buf )
                 == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_hmac_finish( &ctx, buf )
                 == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md_hmac_reset( NULL ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_hmac_reset( &ctx ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md_hmac( NULL, buf, 1, buf, 1, buf )
                 == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    TEST_ASSERT( mbedtls_md_process( NULL, buf ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
    TEST_ASSERT( mbedtls_md_process( &ctx, buf ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );

    /* Ok, this is not NULL arg but NULL return... */
    TEST_ASSERT( mbedtls_md_info_from_type( MBEDTLS_MD_NONE ) == NULL );
    TEST_ASSERT( mbedtls_md_info_from_string( "no such md" ) == NULL );
}
/* END_CASE */

/* BEGIN_CASE */
void md_info( int md_type, char *md_name, int md_size )
{
    const mbedtls_md_info_t *md_info;
    const int *md_type_ptr;
    int found;

    md_info = mbedtls_md_info_from_type( md_type );
    TEST_ASSERT( md_info != NULL );
    TEST_ASSERT( md_info == mbedtls_md_info_from_string( md_name ) );

    TEST_ASSERT( mbedtls_md_get_type( md_info ) == (mbedtls_md_type_t) md_type );
    TEST_ASSERT( mbedtls_md_get_size( md_info ) == (unsigned char) md_size );
    TEST_ASSERT( strcmp( mbedtls_md_get_name( md_info ), md_name ) == 0 );

    found = 0;
    for( md_type_ptr = mbedtls_md_list(); *md_type_ptr != 0; md_type_ptr++ )
        if( *md_type_ptr == md_type )
            found = 1;
    TEST_ASSERT( found == 1 );
}
/* END_CASE */

/* BEGIN_CASE */
void md_text( char *text_md_name, char *text_src_string, char *hex_hash_string )
{
    char md_name[100];
    unsigned char src_str[1000];
    unsigned char hash_str[1000];
    unsigned char output[100];
    const mbedtls_md_info_t *md_info = NULL;

    memset( md_name, 0x00, 100 );
    memset( src_str, 0x00, 1000 );
    memset( hash_str, 0x00, 1000 );
    memset( output, 0x00, 100 );

    strncpy( (char *) src_str, text_src_string, sizeof( src_str ) - 1 );
    strncpy( (char *) md_name, text_md_name, sizeof( md_name ) - 1 );
    md_info = mbedtls_md_info_from_string(md_name);
    TEST_ASSERT( md_info != NULL );

    TEST_ASSERT ( 0 == mbedtls_md( md_info, src_str, strlen( (char *) src_str ), output ) );
    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );

    TEST_ASSERT( strcmp( (char *) hash_str, hex_hash_string ) == 0 );
}
/* END_CASE */

/* BEGIN_CASE */
void md_hex( char *text_md_name, char *hex_src_string, char *hex_hash_string )
{
    char md_name[100];
    unsigned char src_str[10000];
    unsigned char hash_str[10000];
    unsigned char output[100];
    int src_len;
    const mbedtls_md_info_t *md_info = NULL;

    memset( md_name, 0x00, 100 );
    memset( src_str, 0x00, 10000 );
    memset( hash_str, 0x00, 10000 );
    memset( output, 0x00, 100 );

    strncpy( (char *) md_name, text_md_name, sizeof( md_name ) - 1 );
    md_info = mbedtls_md_info_from_string( md_name );
    TEST_ASSERT( md_info != NULL );

    src_len = unhexify( src_str, hex_src_string );
    TEST_ASSERT ( 0 == mbedtls_md( md_info, src_str, src_len, output ) );

    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );

    TEST_ASSERT( strcmp( (char *) hash_str, hex_hash_string ) == 0 );
}
/* END_CASE */

/* BEGIN_CASE */
void md_text_multi( char *text_md_name, char *text_src_string,
                    char *hex_hash_string )
{
    char md_name[100];
    unsigned char src_str[1000];
    unsigned char hash_str[1000];
    unsigned char output[100];
    int halfway, len;

    const mbedtls_md_info_t *md_info = NULL;
    mbedtls_md_context_t ctx, ctx_copy;

    mbedtls_md_init( &ctx );
    mbedtls_md_init( &ctx_copy );

    memset( md_name, 0x00, 100 );
    memset( src_str, 0x00, 1000 );
    memset( hash_str, 0x00, 1000 );
    memset( output, 0x00, 100 );

    strncpy( (char *) src_str, text_src_string, sizeof(src_str) - 1 );
    strncpy( (char *) md_name, text_md_name, sizeof(md_name) - 1 );
    len = strlen( (char *) src_str );
    halfway = len / 2;

    md_info = mbedtls_md_info_from_string(md_name);
    TEST_ASSERT( md_info != NULL );
    TEST_ASSERT ( 0 == mbedtls_md_setup( &ctx, md_info, 0 ) );
    TEST_ASSERT ( 0 == mbedtls_md_setup( &ctx_copy, md_info, 0 ) );

    TEST_ASSERT ( 0 == mbedtls_md_starts( &ctx ) );
    TEST_ASSERT ( ctx.md_ctx != NULL );
    TEST_ASSERT ( 0 == mbedtls_md_update( &ctx, src_str, halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_clone( &ctx_copy, &ctx ) );

    TEST_ASSERT ( 0 == mbedtls_md_update( &ctx, src_str + halfway, len - halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_finish( &ctx, output ) );
    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );
    TEST_ASSERT( strcmp( (char *) hash_str, hex_hash_string ) == 0 );

    /* Test clone */
    memset( hash_str, 0x00, 1000 );
    memset( output, 0x00, 100 );

    TEST_ASSERT ( 0 == mbedtls_md_update( &ctx_copy, src_str + halfway, len - halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_finish( &ctx_copy, output ) );
    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );
    TEST_ASSERT( strcmp( (char *) hash_str, hex_hash_string ) == 0 );

exit:
    mbedtls_md_free( &ctx );
    mbedtls_md_free( &ctx_copy );
}
/* END_CASE */

/* BEGIN_CASE */
void md_hex_multi( char *text_md_name, char *hex_src_string,
                   char *hex_hash_string )
{
    char md_name[100];
    unsigned char src_str[10000];
    unsigned char hash_str[10000];
    unsigned char output[100];
    int src_len, halfway;
    const mbedtls_md_info_t *md_info = NULL;
    mbedtls_md_context_t ctx, ctx_copy;

    mbedtls_md_init( &ctx );
    mbedtls_md_init( &ctx_copy );

    memset( md_name, 0x00, 100 );
    memset( src_str, 0x00, 10000 );
    memset( hash_str, 0x00, 10000 );
    memset( output, 0x00, 100 );

    strncpy( (char *) md_name, text_md_name, sizeof( md_name ) - 1 );
    md_info = mbedtls_md_info_from_string(md_name);
    TEST_ASSERT( md_info != NULL );
    TEST_ASSERT ( 0 == mbedtls_md_setup( &ctx, md_info, 0 ) );
    TEST_ASSERT ( 0 == mbedtls_md_setup( &ctx_copy, md_info, 0 ) );

    src_len = unhexify( src_str, hex_src_string );
    halfway = src_len / 2;

    TEST_ASSERT ( 0 == mbedtls_md_starts( &ctx ) );
    TEST_ASSERT ( ctx.md_ctx != NULL );
    TEST_ASSERT ( 0 == mbedtls_md_update( &ctx, src_str, halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_clone( &ctx_copy, &ctx ) );

    TEST_ASSERT ( 0 == mbedtls_md_update( &ctx, src_str + halfway, src_len - halfway) );
    TEST_ASSERT ( 0 == mbedtls_md_finish( &ctx, output ) );
    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );
    TEST_ASSERT( strcmp( (char *) hash_str, hex_hash_string ) == 0 );

    /* Test clone */
    memset( hash_str, 0x00, 10000 );
    memset( output, 0x00, 100 );

    TEST_ASSERT ( 0 == mbedtls_md_update( &ctx_copy, src_str + halfway, src_len - halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_finish( &ctx_copy, output ) );
    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );
    TEST_ASSERT( strcmp( (char *) hash_str, hex_hash_string ) == 0 );

exit:
    mbedtls_md_free( &ctx );
    mbedtls_md_free( &ctx_copy );
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_md_hmac( char *text_md_name, int trunc_size, char *hex_key_string,
              char *hex_src_string, char *hex_hash_string )
{
    char md_name[100];
    unsigned char src_str[10000];
    unsigned char key_str[10000];
    unsigned char hash_str[10000];
    unsigned char output[100];
    int key_len, src_len;
    const mbedtls_md_info_t *md_info = NULL;

    memset( md_name, 0x00, 100 );
    memset( src_str, 0x00, 10000 );
    memset( key_str, 0x00, 10000 );
    memset( hash_str, 0x00, 10000 );
    memset( output, 0x00, 100 );

    strncpy( (char *) md_name, text_md_name, sizeof( md_name ) - 1 );
    md_info = mbedtls_md_info_from_string( md_name );
    TEST_ASSERT( md_info != NULL );

    key_len = unhexify( key_str, hex_key_string );
    src_len = unhexify( src_str, hex_src_string );

    TEST_ASSERT ( mbedtls_md_hmac( md_info, key_str, key_len, src_str, src_len, output ) == 0 );
    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );

    TEST_ASSERT( strncmp( (char *) hash_str, hex_hash_string, trunc_size * 2 ) == 0 );
}
/* END_CASE */

/* BEGIN_CASE */
void md_hmac_multi( char *text_md_name, int trunc_size, char *hex_key_string,
                    char *hex_src_string, char *hex_hash_string )
{
    char md_name[100];
    unsigned char src_str[10000];
    unsigned char key_str[10000];
    unsigned char hash_str[10000];
    unsigned char output[100];
    int key_len, src_len, halfway;
    const mbedtls_md_info_t *md_info = NULL;
    mbedtls_md_context_t ctx;

    mbedtls_md_init( &ctx );

    memset( md_name, 0x00, 100 );
    memset( src_str, 0x00, 10000 );
    memset( key_str, 0x00, 10000 );
    memset( hash_str, 0x00, 10000 );
    memset( output, 0x00, 100 );

    strncpy( (char *) md_name, text_md_name, sizeof( md_name ) - 1 );
    md_info = mbedtls_md_info_from_string( md_name );
    TEST_ASSERT( md_info != NULL );
    TEST_ASSERT ( 0 == mbedtls_md_setup( &ctx, md_info, 1 ) );

    key_len = unhexify( key_str, hex_key_string );
    src_len = unhexify( src_str, hex_src_string );
    halfway = src_len / 2;

    TEST_ASSERT ( 0 == mbedtls_md_hmac_starts( &ctx, key_str, key_len ) );
    TEST_ASSERT ( ctx.md_ctx != NULL );
    TEST_ASSERT ( 0 == mbedtls_md_hmac_update( &ctx, src_str, halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_hmac_update( &ctx, src_str + halfway, src_len - halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_hmac_finish( &ctx, output ) );

    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );
    TEST_ASSERT( strncmp( (char *) hash_str, hex_hash_string, trunc_size * 2 ) == 0 );

    /* Test again, for reset() */
    memset( hash_str, 0x00, 10000 );
    memset( output, 0x00, 100 );

    TEST_ASSERT ( 0 == mbedtls_md_hmac_reset( &ctx ) );
    TEST_ASSERT ( 0 == mbedtls_md_hmac_update( &ctx, src_str, halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_hmac_update( &ctx, src_str + halfway, src_len - halfway ) );
    TEST_ASSERT ( 0 == mbedtls_md_hmac_finish( &ctx, output ) );

    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );
    TEST_ASSERT( strncmp( (char *) hash_str, hex_hash_string, trunc_size * 2 ) == 0 );

exit:
    mbedtls_md_free( &ctx );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO */
void mbedtls_md_file( char *text_md_name, char *filename, char *hex_hash_string )
{
    char md_name[100];
    unsigned char hash_str[1000];
    unsigned char output[100];
    const mbedtls_md_info_t *md_info = NULL;

    memset( md_name, 0x00, 100 );
    memset( hash_str, 0x00, 1000 );
    memset( output, 0x00, 100 );

    strncpy( (char *) md_name, text_md_name, sizeof( md_name ) - 1 );
    md_info = mbedtls_md_info_from_string( md_name );
    TEST_ASSERT( md_info != NULL );

    TEST_ASSERT( mbedtls_md_file( md_info, filename, output ) == 0 );
    hexify( hash_str, output, mbedtls_md_get_size( md_info ) );

    TEST_ASSERT( strcmp( (char *) hash_str, hex_hash_string ) == 0 );
}
/* END_CASE */