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

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_AES_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void aes_encrypt_ecb( char *hex_key_string, char *hex_src_string,
                      char *hex_dst_string, int setkey_result )
{
    unsigned char key_str[100];
    unsigned char src_str[100];
    unsigned char dst_str[100];
    unsigned char output[100];
    mbedtls_aes_context ctx;
    int key_len;

    memset(key_str, 0x00, 100);
    memset(src_str, 0x00, 100);
    memset(dst_str, 0x00, 100);
    memset(output, 0x00, 100);
    mbedtls_aes_init( &ctx );

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

    TEST_ASSERT( mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 ) == setkey_result );
    if( setkey_result == 0 )
    {
        TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx, MBEDTLS_AES_ENCRYPT, src_str, output ) == 0 );
        hexify( dst_str, output, 16 );

        TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );
    }

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

/* BEGIN_CASE */
void aes_decrypt_ecb( char *hex_key_string, char *hex_src_string,
                      char *hex_dst_string, int setkey_result )
{
    unsigned char key_str[100];
    unsigned char src_str[100];
    unsigned char dst_str[100];
    unsigned char output[100];
    mbedtls_aes_context ctx;
    int key_len;

    memset(key_str, 0x00, 100);
    memset(src_str, 0x00, 100);
    memset(dst_str, 0x00, 100);
    memset(output, 0x00, 100);
    mbedtls_aes_init( &ctx );

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

    TEST_ASSERT( mbedtls_aes_setkey_dec( &ctx, key_str, key_len * 8 ) == setkey_result );
    if( setkey_result == 0 )
    {
        TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx, MBEDTLS_AES_DECRYPT, src_str, output ) == 0 );
        hexify( dst_str, output, 16 );

        TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );
    }

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

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CBC */
void aes_encrypt_cbc( char *hex_key_string, char *hex_iv_string,
                      char *hex_src_string, char *hex_dst_string,
                      int cbc_result )
{
    unsigned char key_str[100];
    unsigned char iv_str[100];
    unsigned char src_str[100];
    unsigned char dst_str[100];
    unsigned char output[100];
    mbedtls_aes_context ctx;
    int key_len, data_len;

    memset(key_str, 0x00, 100);
    memset(iv_str, 0x00, 100);
    memset(src_str, 0x00, 100);
    memset(dst_str, 0x00, 100);
    memset(output, 0x00, 100);
    mbedtls_aes_init( &ctx );

    key_len = unhexify( key_str, hex_key_string );
    unhexify( iv_str, hex_iv_string );
    data_len = unhexify( src_str, hex_src_string );

    mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 );
    TEST_ASSERT( mbedtls_aes_crypt_cbc( &ctx, MBEDTLS_AES_ENCRYPT, data_len, iv_str, src_str, output ) == cbc_result );
    if( cbc_result == 0 )
    {
        hexify( dst_str, output, data_len );

        TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );
    }

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

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CBC */
void aes_decrypt_cbc( char *hex_key_string, char *hex_iv_string,
                      char *hex_src_string, char *hex_dst_string,
                      int cbc_result )
{
    unsigned char key_str[100];
    unsigned char iv_str[100];
    unsigned char src_str[100];
    unsigned char dst_str[100];
    unsigned char output[100];
    mbedtls_aes_context ctx;
    int key_len, data_len;

    memset(key_str, 0x00, 100);
    memset(iv_str, 0x00, 100);
    memset(src_str, 0x00, 100);
    memset(dst_str, 0x00, 100);
    memset(output, 0x00, 100);
    mbedtls_aes_init( &ctx );

    key_len = unhexify( key_str, hex_key_string );
    unhexify( iv_str, hex_iv_string );
    data_len = unhexify( src_str, hex_src_string );

    mbedtls_aes_setkey_dec( &ctx, key_str, key_len * 8 );
    TEST_ASSERT( mbedtls_aes_crypt_cbc( &ctx, MBEDTLS_AES_DECRYPT, data_len, iv_str, src_str, output ) == cbc_result );
    if( cbc_result == 0)
    {
        hexify( dst_str, output, data_len );

        TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );
    }

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

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
void aes_encrypt_xts( char *hex_key_string, char *hex_data_unit_string,
                      char *hex_src_string, char *hex_dst_string )
{
    enum { AES_BLOCK_SIZE = 16 };
    unsigned char *data_unit = NULL;
    unsigned char *key = NULL;
    unsigned char *src = NULL;
    unsigned char *dst = NULL;
    unsigned char *output = NULL;
    mbedtls_aes_xts_context ctx;
    size_t key_len, src_len, dst_len, data_unit_len;

    mbedtls_aes_xts_init( &ctx );

    data_unit = unhexify_alloc( hex_data_unit_string, &data_unit_len );
    TEST_ASSERT( data_unit_len == AES_BLOCK_SIZE );

    key = unhexify_alloc( hex_key_string, &key_len );
    TEST_ASSERT( key_len % 2 == 0 );

    src = unhexify_alloc( hex_src_string, &src_len );
    dst = unhexify_alloc( hex_dst_string, &dst_len );
    TEST_ASSERT( src_len == dst_len );

    output = zero_alloc( dst_len );

    TEST_ASSERT( mbedtls_aes_xts_setkey_enc( &ctx, key, key_len * 8 ) == 0 );
    TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_ENCRYPT, src_len,
                                        data_unit, src, output ) == 0 );

    TEST_ASSERT( memcmp( output, dst, dst_len ) == 0 );

exit:
    mbedtls_aes_xts_free( &ctx );
    mbedtls_free( data_unit );
    mbedtls_free( key );
    mbedtls_free( src );
    mbedtls_free( dst );
    mbedtls_free( output );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
void aes_decrypt_xts( char *hex_key_string, char *hex_data_unit_string,
                      char *hex_dst_string, char *hex_src_string )
{
    enum { AES_BLOCK_SIZE = 16 };
    unsigned char *data_unit = NULL;
    unsigned char *key = NULL;
    unsigned char *src = NULL;
    unsigned char *dst = NULL;
    unsigned char *output = NULL;
    mbedtls_aes_xts_context ctx;
    size_t key_len, src_len, dst_len, data_unit_len;

    mbedtls_aes_xts_init( &ctx );

    data_unit = unhexify_alloc( hex_data_unit_string, &data_unit_len );
    TEST_ASSERT( data_unit_len == AES_BLOCK_SIZE );

    key = unhexify_alloc( hex_key_string, &key_len );
    TEST_ASSERT( key_len % 2 == 0 );

    src = unhexify_alloc( hex_src_string, &src_len );
    dst = unhexify_alloc( hex_dst_string, &dst_len );
    TEST_ASSERT( src_len == dst_len );

    output = zero_alloc( dst_len );

    TEST_ASSERT( mbedtls_aes_xts_setkey_dec( &ctx, key, key_len * 8 ) == 0 );
    TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_DECRYPT, src_len,
                                        data_unit, src, output ) == 0 );

    TEST_ASSERT( memcmp( output, dst, dst_len ) == 0 );

exit:
    mbedtls_aes_xts_free( &ctx );
    mbedtls_free( data_unit );
    mbedtls_free( key );
    mbedtls_free( src );
    mbedtls_free( dst );
    mbedtls_free( output );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
void aes_crypt_xts_size( int size, int retval )
{
    mbedtls_aes_xts_context ctx;
    const unsigned char *src = NULL;
    unsigned char *output = NULL;
    unsigned char data_unit[16];
    size_t length = size;

    mbedtls_aes_xts_init( &ctx );
    memset( data_unit, 0x00, sizeof( data_unit ) );


    /* Note that this function will most likely crash on failure, as NULL
     * parameters will be used. In the passing case, the length check in
     * mbedtls_aes_crypt_xts() will prevent any accesses to parameters by
     * exiting the function early. */
    TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_ENCRYPT, length, data_unit, src, output ) == retval );
}
/* END_CASE */



/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
void aes_encrypt_cfb128( char *hex_key_string, char *hex_iv_string,
                         char *hex_src_string, char *hex_dst_string )
{
    unsigned char key_str[100];
    unsigned char iv_str[100];
    unsigned char src_str[100];
    unsigned char dst_str[100];
    unsigned char output[100];
    mbedtls_aes_context ctx;
    size_t iv_offset = 0;
    int key_len;

    memset(key_str, 0x00, 100);
    memset(iv_str, 0x00, 100);
    memset(src_str, 0x00, 100);
    memset(dst_str, 0x00, 100);
    memset(output, 0x00, 100);
    mbedtls_aes_init( &ctx );

    key_len = unhexify( key_str, hex_key_string );
    unhexify( iv_str, hex_iv_string );
    unhexify( src_str, hex_src_string );

    mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 );
    TEST_ASSERT( mbedtls_aes_crypt_cfb128( &ctx, MBEDTLS_AES_ENCRYPT, 16, &iv_offset, iv_str, src_str, output ) == 0 );
    hexify( dst_str, output, 16 );

    TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );

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

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
void aes_decrypt_cfb128( char *hex_key_string, char *hex_iv_string,
                         char *hex_src_string, char *hex_dst_string )
{
    unsigned char key_str[100];
    unsigned char iv_str[100];
    unsigned char src_str[100];
    unsigned char dst_str[100];
    unsigned char output[100];
    mbedtls_aes_context ctx;
    size_t iv_offset = 0;
    int key_len;

    memset(key_str, 0x00, 100);
    memset(iv_str, 0x00, 100);
    memset(src_str, 0x00, 100);
    memset(dst_str, 0x00, 100);
    memset(output, 0x00, 100);
    mbedtls_aes_init( &ctx );

    key_len = unhexify( key_str, hex_key_string );
    unhexify( iv_str, hex_iv_string );
    unhexify( src_str, hex_src_string );

    mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 );
    TEST_ASSERT( mbedtls_aes_crypt_cfb128( &ctx, MBEDTLS_AES_DECRYPT, 16, &iv_offset, iv_str, src_str, output ) == 0 );
    hexify( dst_str, output, 16 );

    TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );

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

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
void aes_encrypt_cfb8( char *hex_key_string, char *hex_iv_string,
                       char *hex_src_string, char *hex_dst_string )
{
    unsigned char key_str[100];
    unsigned char iv_str[100];
    unsigned char src_str[100];
    unsigned char dst_str[100];
    unsigned char output[100];
    mbedtls_aes_context ctx;
    int key_len, src_len;

    memset(key_str, 0x00, 100);
    memset(iv_str, 0x00, 100);
    memset(src_str, 0x00, 100);
    memset(dst_str, 0x00, 100);
    memset(output, 0x00, 100);
    mbedtls_aes_init( &ctx );

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

    mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 );
    TEST_ASSERT( mbedtls_aes_crypt_cfb8( &ctx, MBEDTLS_AES_ENCRYPT, src_len, iv_str, src_str, output ) == 0 );
    hexify( dst_str, output, src_len );

    TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );

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

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
void aes_decrypt_cfb8( char *hex_key_string, char *hex_iv_string,
                       char *hex_src_string, char *hex_dst_string )
{
    unsigned char key_str[100];
    unsigned char iv_str[100];
    unsigned char src_str[100];
    unsigned char dst_str[100];
    unsigned char output[100];
    mbedtls_aes_context ctx;
    int key_len, src_len;

    memset(key_str, 0x00, 100);
    memset(iv_str, 0x00, 100);
    memset(src_str, 0x00, 100);
    memset(dst_str, 0x00, 100);
    memset(output, 0x00, 100);
    mbedtls_aes_init( &ctx );

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

    mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 );
    TEST_ASSERT( mbedtls_aes_crypt_cfb8( &ctx, MBEDTLS_AES_DECRYPT, src_len, iv_str, src_str, output ) == 0 );
    hexify( dst_str, output, src_len );

    TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );

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

/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_OFB */
void aes_encrypt_ofb( int fragment_size, char *hex_key_string,
                      char *hex_iv_string, char *hex_src_string,
                      char *hex_dst_string )
{
    unsigned char key_str[32];
    unsigned char iv_str[16];
    unsigned char src_str[64];
    unsigned char dst_str[64];
    unsigned char output[32];
    mbedtls_aes_context ctx;
    size_t iv_offset = 0;
    int in_buffer_len;
    unsigned char* src_str_next;
    int key_len;

    memset( key_str, 0x00, sizeof( key_str ) );
    memset( iv_str, 0x00, sizeof( iv_str ) );
    memset( src_str, 0x00, sizeof( src_str ) );
    memset( dst_str, 0x00, sizeof( dst_str ) );
    memset( output, 0x00, sizeof( output ) );
    mbedtls_aes_init( &ctx );

    TEST_ASSERT( strlen( hex_key_string ) <= ( 32 * 2 ) );
    TEST_ASSERT( strlen( hex_iv_string ) <= ( 16 * 2 ) );
    TEST_ASSERT( strlen( hex_src_string ) <= ( 64 * 2 ) );
    TEST_ASSERT( strlen( hex_dst_string ) <= ( 64 * 2 ) );

    key_len = unhexify( key_str, hex_key_string );
    unhexify( iv_str, hex_iv_string );
    in_buffer_len = unhexify( src_str, hex_src_string );

    TEST_ASSERT( mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 ) == 0 );
    src_str_next = src_str;

    while( in_buffer_len > 0 )
    {
        TEST_ASSERT( mbedtls_aes_crypt_ofb( &ctx, fragment_size, &iv_offset,
                                            iv_str, src_str_next, output ) == 0 );

        hexify( dst_str, output, fragment_size );
        TEST_ASSERT( strncmp( (char *) dst_str, hex_dst_string,
                              ( 2 * fragment_size ) ) == 0 );

        in_buffer_len -= fragment_size;
        hex_dst_string += ( fragment_size * 2 );
        src_str_next += fragment_size;

        if( in_buffer_len < fragment_size )
            fragment_size = in_buffer_len;
    }

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

/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
void aes_selftest()
{
    TEST_ASSERT( mbedtls_aes_self_test( 1 ) == 0 );
}
/* END_CASE */