BEGIN_HEADER
#include <polarssl/cipher.h>
END_HEADER

BEGIN_DEPENDENCIES
depends_on:POLARSSL_CIPHER_C
END_DEPENDENCIES

BEGIN_CASE
enc_dec_buf:#cipher_id:cipher_string:#key_len:#length_val:#pad_mode
{
    size_t length = {length_val};
    unsigned char key[32];
    unsigned char iv[16];

    const cipher_info_t *cipher_info;
    cipher_context_t ctx_dec;
    cipher_context_t ctx_enc;

    unsigned char inbuf[64];
    unsigned char encbuf[64];
    unsigned char decbuf[64];

    size_t outlen = 0;
    size_t total_len = 0;

    memset( key, 0, 32 );
    memset( iv , 0, 16 );
    
    memset( &ctx_dec, 0, sizeof( ctx_dec ) );
    memset( &ctx_enc, 0, sizeof( ctx_enc ) );
    
    memset( inbuf, 5, 64 );
    memset( encbuf, 0, 64 );
    memset( decbuf, 0, 64 );

    /* Check and get info structures */
    cipher_info = cipher_info_from_type( {cipher_id} );
    TEST_ASSERT( NULL != cipher_info );
    TEST_ASSERT( cipher_info_from_string( {cipher_string} ) == cipher_info );

    /* Initialise enc and dec contexts */
    TEST_ASSERT( 0 == cipher_init_ctx( &ctx_dec, cipher_info ) );
    TEST_ASSERT( 0 == cipher_init_ctx( &ctx_enc, cipher_info ) );
    
    TEST_ASSERT( 0 == cipher_setkey( &ctx_dec, key, {key_len}, POLARSSL_DECRYPT ) );
    TEST_ASSERT( 0 == cipher_setkey( &ctx_enc, key, {key_len}, POLARSSL_ENCRYPT ) );

    if( -1 != {pad_mode} )
    {
        TEST_ASSERT( 0 == cipher_set_padding_mode( &ctx_dec, {pad_mode} ) );
        TEST_ASSERT( 0 == cipher_set_padding_mode( &ctx_enc, {pad_mode} ) );
    }

    TEST_ASSERT( 0 == cipher_reset( &ctx_dec, iv ) );
    TEST_ASSERT( 0 == cipher_reset( &ctx_enc, iv ) );

    /* encode length number of bytes from inbuf */
    TEST_ASSERT( 0 == cipher_update( &ctx_enc, inbuf, length, encbuf, &outlen ) );
    total_len = outlen;

    TEST_ASSERT( total_len == length ||
                 ( total_len % cipher_get_block_size( &ctx_enc ) == 0 &&
                   total_len < length &&
                   total_len + cipher_get_block_size( &ctx_enc ) > length ) );

    TEST_ASSERT( 0 == cipher_finish( &ctx_enc, encbuf + outlen, &outlen ) );
    total_len += outlen;

    TEST_ASSERT( total_len == length ||
                 ( total_len % cipher_get_block_size( &ctx_enc ) == 0 &&
                   total_len > length &&
                   total_len <= length + cipher_get_block_size( &ctx_enc ) ) );

    /* decode the previously encoded string */
    TEST_ASSERT( 0 == cipher_update( &ctx_dec, encbuf, total_len, decbuf, &outlen ) );
    total_len = outlen;

    TEST_ASSERT( total_len == length ||
                 ( total_len % cipher_get_block_size( &ctx_dec ) == 0 &&
                   total_len < length &&
                   total_len + cipher_get_block_size( &ctx_dec ) >= length ) );

    TEST_ASSERT( 0 == cipher_finish( &ctx_dec, decbuf + outlen, &outlen ) );
    total_len += outlen;

    TEST_ASSERT( total_len == length );

    TEST_ASSERT( 0 == memcmp(inbuf, decbuf, length) );

    TEST_ASSERT( 0 == cipher_free_ctx( &ctx_dec ) );
    TEST_ASSERT( 0 == cipher_free_ctx( &ctx_enc ) );
}
END_CASE

BEGIN_CASE
enc_fail:#cipher_id:#pad_mode:#key_len:#length_val:#ret
{
    size_t length = {length_val};
    unsigned char key[32];
    unsigned char iv[16];

    const cipher_info_t *cipher_info;
    cipher_context_t ctx;

    unsigned char inbuf[64];
    unsigned char encbuf[64];

    size_t outlen = 0;

    memset( key, 0, 32 );
    memset( iv , 0, 16 );

    memset( &ctx, 0, sizeof( ctx ) );

    memset( inbuf, 5, 64 );
    memset( encbuf, 0, 64 );

    /* Check and get info structures */
    cipher_info = cipher_info_from_type( {cipher_id} );
    TEST_ASSERT( NULL != cipher_info );

    /* Initialise context */
    TEST_ASSERT( 0 == cipher_init_ctx( &ctx, cipher_info ) );
    TEST_ASSERT( 0 == cipher_setkey( &ctx, key, {key_len}, POLARSSL_ENCRYPT ) );
    TEST_ASSERT( 0 == cipher_set_padding_mode( &ctx, {pad_mode} ) );
    TEST_ASSERT( 0 == cipher_reset( &ctx, iv ) );

    /* encode length number of bytes from inbuf */
    TEST_ASSERT( 0 == cipher_update( &ctx, inbuf, length, encbuf, &outlen ) );
    TEST_ASSERT( {ret} == cipher_finish( &ctx, encbuf + outlen, &outlen ) );

    /* done */
    TEST_ASSERT( 0 == cipher_free_ctx( &ctx ) );
}
END_CASE

BEGIN_CASE
dec_empty_buf:
{
    unsigned char key[32];
    unsigned char iv[16];

    cipher_context_t ctx_dec;
    const 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 );
    
    memset( &ctx_dec, 0, sizeof( ctx_dec ) );
    
    memset( encbuf, 0, 64 );
    memset( decbuf, 0, 64 );

    /* Initialise enc and dec contexts */
    cipher_info = cipher_info_from_type( POLARSSL_CIPHER_AES_128_CBC );
    TEST_ASSERT( NULL != cipher_info);
    
    TEST_ASSERT( 0 == cipher_init_ctx( &ctx_dec, cipher_info ) );

    TEST_ASSERT( 0 == cipher_setkey( &ctx_dec, key, 128, POLARSSL_DECRYPT ) );

    TEST_ASSERT( 0 == cipher_reset( &ctx_dec, iv ) );

    /* decode 0-byte string */
    TEST_ASSERT( 0 == cipher_update( &ctx_dec, encbuf, 0, decbuf, &outlen ) );
    TEST_ASSERT( 0 == outlen );
    TEST_ASSERT( POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED == cipher_finish( &ctx_dec, decbuf + outlen, &outlen ) );
    TEST_ASSERT( 0 == outlen );

    TEST_ASSERT( 0 == cipher_free_ctx( &ctx_dec ) );
}
END_CASE

BEGIN_CASE
enc_dec_buf_multipart:#cipher_id:#key_len:#first_length_val:#second_length_val
{
    size_t first_length = {first_length_val};
    size_t second_length = {second_length_val};
    size_t length = first_length + second_length;
    unsigned char key[32];
    unsigned char iv[16];

    cipher_context_t ctx_dec;
    cipher_context_t ctx_enc;
    const 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 );
    
    memset( &ctx_dec, 0, sizeof( ctx_dec ) );
    memset( &ctx_enc, 0, sizeof( ctx_enc ) );
        
    memset( inbuf, 5, 64 );
    memset( encbuf, 0, 64 );
    memset( decbuf, 0, 64 );

    /* Initialise enc and dec contexts */
    cipher_info = cipher_info_from_type( {cipher_id} );
    TEST_ASSERT( NULL != cipher_info);
    
    TEST_ASSERT( 0 == cipher_init_ctx( &ctx_dec, cipher_info ) );
    TEST_ASSERT( 0 == cipher_init_ctx( &ctx_enc, cipher_info ) );
    
    TEST_ASSERT( 0 == cipher_setkey( &ctx_dec, key, {key_len}, POLARSSL_DECRYPT ) );
    TEST_ASSERT( 0 == cipher_setkey( &ctx_enc, key, {key_len}, POLARSSL_ENCRYPT ) );

    TEST_ASSERT( 0 == cipher_reset( &ctx_dec, iv ) );
    TEST_ASSERT( 0 == cipher_reset( &ctx_enc, iv ) );

    /* encode length number of bytes from inbuf */
    TEST_ASSERT( 0 == cipher_update( &ctx_enc, inbuf, first_length, encbuf, &outlen ) );
    totaloutlen = outlen;
    TEST_ASSERT( 0 == cipher_update( &ctx_enc, inbuf + first_length, second_length, encbuf + totaloutlen, &outlen ) );
    totaloutlen += outlen;
    TEST_ASSERT( totaloutlen == length ||
                 ( totaloutlen % cipher_get_block_size( &ctx_enc ) == 0 &&
                   totaloutlen < length &&
                   totaloutlen + cipher_get_block_size( &ctx_enc ) > length ) );

    TEST_ASSERT( 0 == cipher_finish( &ctx_enc, encbuf + totaloutlen, &outlen ) );
    totaloutlen += outlen;
    TEST_ASSERT( totaloutlen == length ||
                 ( totaloutlen % cipher_get_block_size( &ctx_enc ) == 0 &&
                   totaloutlen > length &&
                   totaloutlen <= length + cipher_get_block_size( &ctx_enc ) ) );

    /* decode the previously encoded string */
    TEST_ASSERT( 0 == cipher_update( &ctx_dec, encbuf, totaloutlen, decbuf, &outlen ) );
    totaloutlen = outlen;

    TEST_ASSERT( totaloutlen == length ||
                 ( totaloutlen % cipher_get_block_size( &ctx_dec ) == 0 &&
                   totaloutlen < length &&
                   totaloutlen + cipher_get_block_size( &ctx_dec ) > length ) );

    TEST_ASSERT( 0 == cipher_finish( &ctx_dec, decbuf + outlen, &outlen ) );
    totaloutlen += outlen;

    TEST_ASSERT( totaloutlen == length );

    TEST_ASSERT( 0 == memcmp(inbuf, decbuf, length) );

    TEST_ASSERT( 0 == cipher_free_ctx( &ctx_dec ) );
    TEST_ASSERT( 0 == cipher_free_ctx( &ctx_enc ) );
}
END_CASE

BEGIN_CASE
set_padding:#cipher_id:#pad_mode:#ret
{
    const cipher_info_t *cipher_info;
    cipher_context_t ctx;

    cipher_info = cipher_info_from_type( {cipher_id} );
    TEST_ASSERT( NULL != cipher_info );
    TEST_ASSERT( 0 == cipher_init_ctx( &ctx, cipher_info ) );

    TEST_ASSERT( {ret} == cipher_set_padding_mode( &ctx, {pad_mode} ) );

    TEST_ASSERT( 0 == cipher_free_ctx( &ctx ) );
}
END_CASE

BEGIN_CASE
check_padding:#pad_mode:input_str:#ret:#dlen_check
{
    cipher_info_t cipher_info;
    cipher_context_t ctx;
    unsigned char input[16];
    size_t ilen, dlen;

    /* build a fake context just for getting access to get_padding */
    memset( &ctx, 0, sizeof( ctx ) );
    cipher_info.mode = POLARSSL_MODE_CBC;
    ctx.cipher_info = &cipher_info;

    TEST_ASSERT( 0 == cipher_set_padding_mode( &ctx, {pad_mode} ) );

    ilen = unhexify( input, {input_str} );

    TEST_ASSERT( {ret} == ctx.get_padding( input, ilen, &dlen ) );
    if( 0 == {ret} )
        TEST_ASSERT( dlen == (size_t) {dlen_check} );
}
END_CASE

BEGIN_CASE
cipher_selftest:
{
    TEST_ASSERT( cipher_self_test( 0 ) == 0 );
}
END_CASE