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

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PKCS1_V15:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void pkcs1_rsaes_v15_encrypt( int mod, int radix_N, char *input_N, int radix_E,
                               char *input_E, int hash,
                               char *message_hex_string, char *seed,
                               char *result_hex_str, int result )
{
    unsigned char message_str[1000];
    unsigned char output[1000];
    unsigned char output_str[1000];
    unsigned char rnd_buf[1000];
    mbedtls_rsa_context ctx;
    size_t msg_len;
    rnd_buf_info info;

    info.length = unhexify( rnd_buf, seed );
    info.buf = rnd_buf;

    mbedtls_rsa_init( &ctx, MBEDTLS_RSA_PKCS_V15, hash );
    memset( message_str, 0x00, 1000 );
    memset( output, 0x00, 1000 );
    memset( output_str, 0x00, 1000 );

    ctx.len = mod / 8 + ( ( mod % 8 ) ? 1 : 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.N, radix_N, input_N ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.E, radix_E, input_E ) == 0 );

    TEST_ASSERT( mbedtls_rsa_check_pubkey( &ctx ) == 0 );

    msg_len = unhexify( message_str, message_hex_string );

    TEST_ASSERT( mbedtls_rsa_pkcs1_encrypt( &ctx, &rnd_buffer_rand, &info, MBEDTLS_RSA_PUBLIC, msg_len, message_str, output ) == result );
    if( result == 0 )
    {
        hexify( output_str, output, ctx.len );

        TEST_ASSERT( strcasecmp( (char *) output_str, result_hex_str ) == 0 );
    }

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

/* BEGIN_CASE */
void pkcs1_rsaes_v15_decrypt( int mod, int radix_P, char *input_P,
                               int radix_Q, char *input_Q, int radix_N,
                               char *input_N, int radix_E, char *input_E,
                               int hash, char *result_hex_str, char *seed,
                               char *message_hex_string, int result )
{
    unsigned char message_str[1000];
    unsigned char output[1000];
    unsigned char output_str[1000];
    mbedtls_rsa_context ctx;
    mbedtls_mpi P1, Q1, H, G;
    size_t output_len;
    rnd_pseudo_info rnd_info;
    ((void) seed);

    mbedtls_mpi_init( &P1 ); mbedtls_mpi_init( &Q1 ); mbedtls_mpi_init( &H ); mbedtls_mpi_init( &G );
    mbedtls_rsa_init( &ctx, MBEDTLS_RSA_PKCS_V15, hash );

    memset( message_str, 0x00, 1000 );
    memset( output, 0x00, 1000 );
    memset( output_str, 0x00, 1000 );
    memset( &rnd_info, 0, sizeof( rnd_pseudo_info ) );

    ctx.len = mod / 8 + ( ( mod % 8 ) ? 1 : 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.P, radix_P, input_P ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.Q, radix_Q, input_Q ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.N, radix_N, input_N ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.E, radix_E, input_E ) == 0 );

    TEST_ASSERT( mbedtls_mpi_sub_int( &P1, &ctx.P, 1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_sub_int( &Q1, &ctx.Q, 1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_mul_mpi( &H, &P1, &Q1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_gcd( &G, &ctx.E, &H  ) == 0 );
    TEST_ASSERT( mbedtls_mpi_inv_mod( &ctx.D , &ctx.E, &H  ) == 0 );
    TEST_ASSERT( mbedtls_mpi_mod_mpi( &ctx.DP, &ctx.D, &P1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_mod_mpi( &ctx.DQ, &ctx.D, &Q1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_inv_mod( &ctx.QP, &ctx.Q, &ctx.P ) == 0 );

    TEST_ASSERT( mbedtls_rsa_check_privkey( &ctx ) == 0 );

    unhexify( message_str, message_hex_string );

    TEST_ASSERT( mbedtls_rsa_pkcs1_decrypt( &ctx, &rnd_pseudo_rand, &rnd_info, MBEDTLS_RSA_PRIVATE, &output_len, message_str, output, 1000 ) == result );
    if( result == 0 )
    {
        hexify( output_str, output, ctx.len );

        TEST_ASSERT( strncasecmp( (char *) output_str, result_hex_str, strlen( result_hex_str ) ) == 0 );
    }

exit:
    mbedtls_mpi_free( &P1 ); mbedtls_mpi_free( &Q1 ); mbedtls_mpi_free( &H ); mbedtls_mpi_free( &G );
    mbedtls_rsa_free( &ctx );
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_rsassa_v15_sign( int mod, int radix_P, char *input_P, int radix_Q,
                            char *input_Q, int radix_N, char *input_N,
                            int radix_E, char *input_E, int digest, int hash,
                            char *message_hex_string, char *salt,
                            char *result_hex_str, int result )
{
    unsigned char message_str[1000];
    unsigned char hash_result[1000];
    unsigned char output[1000];
    unsigned char output_str[1000];
    unsigned char rnd_buf[1000];
    mbedtls_rsa_context ctx;
    mbedtls_mpi P1, Q1, H, G;
    size_t msg_len;
    rnd_buf_info info;

    info.length = unhexify( rnd_buf, salt );
    info.buf = rnd_buf;

    mbedtls_mpi_init( &P1 ); mbedtls_mpi_init( &Q1 ); mbedtls_mpi_init( &H ); mbedtls_mpi_init( &G );
    mbedtls_rsa_init( &ctx, MBEDTLS_RSA_PKCS_V15, hash );

    memset( message_str, 0x00, 1000 );
    memset( hash_result, 0x00, 1000 );
    memset( output, 0x00, 1000 );
    memset( output_str, 0x00, 1000 );

    ctx.len = mod / 8 + ( ( mod % 8 ) ? 1 : 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.P, radix_P, input_P ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.Q, radix_Q, input_Q ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.N, radix_N, input_N ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.E, radix_E, input_E ) == 0 );

    TEST_ASSERT( mbedtls_mpi_sub_int( &P1, &ctx.P, 1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_sub_int( &Q1, &ctx.Q, 1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_mul_mpi( &H, &P1, &Q1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_gcd( &G, &ctx.E, &H  ) == 0 );
    TEST_ASSERT( mbedtls_mpi_inv_mod( &ctx.D , &ctx.E, &H  ) == 0 );
    TEST_ASSERT( mbedtls_mpi_mod_mpi( &ctx.DP, &ctx.D, &P1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_mod_mpi( &ctx.DQ, &ctx.D, &Q1 ) == 0 );
    TEST_ASSERT( mbedtls_mpi_inv_mod( &ctx.QP, &ctx.Q, &ctx.P ) == 0 );

    TEST_ASSERT( mbedtls_rsa_check_privkey( &ctx ) == 0 );

    msg_len = unhexify( message_str, message_hex_string );

    if( mbedtls_md_info_from_type( digest ) != NULL )
        TEST_ASSERT( mbedtls_md( mbedtls_md_info_from_type( digest ), message_str, msg_len, hash_result ) == 0 );

    TEST_ASSERT( mbedtls_rsa_pkcs1_sign( &ctx, &rnd_buffer_rand, &info, MBEDTLS_RSA_PRIVATE, digest, 0, hash_result, output ) == result );
    if( result == 0 )
    {
        hexify( output_str, output, ctx.len);

        TEST_ASSERT( strcasecmp( (char *) output_str, result_hex_str ) == 0 );
    }

exit:
    mbedtls_mpi_free( &P1 ); mbedtls_mpi_free( &Q1 ); mbedtls_mpi_free( &H ); mbedtls_mpi_free( &G );
    mbedtls_rsa_free( &ctx );
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_rsassa_v15_verify( int mod, int radix_N, char *input_N, int radix_E,
                              char *input_E, int digest, int hash,
                              char *message_hex_string, char *salt,
                              char *result_hex_str, int result )
{
    unsigned char message_str[1000];
    unsigned char hash_result[1000];
    unsigned char result_str[1000];
    mbedtls_rsa_context ctx;
    size_t msg_len;
    ((void) salt);

    mbedtls_rsa_init( &ctx, MBEDTLS_RSA_PKCS_V15, hash );
    memset( message_str, 0x00, 1000 );
    memset( hash_result, 0x00, 1000 );
    memset( result_str, 0x00, 1000 );

    ctx.len = mod / 8 + ( ( mod % 8 ) ? 1 : 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.N, radix_N, input_N ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_string( &ctx.E, radix_E, input_E ) == 0 );

    TEST_ASSERT( mbedtls_rsa_check_pubkey( &ctx ) == 0 );

    msg_len = unhexify( message_str, message_hex_string );
    unhexify( result_str, result_hex_str );

    if( mbedtls_md_info_from_type( digest ) != NULL )
        TEST_ASSERT( mbedtls_md( mbedtls_md_info_from_type( digest ), message_str, msg_len, hash_result ) == 0 );

    TEST_ASSERT( mbedtls_rsa_pkcs1_verify( &ctx, NULL, NULL, MBEDTLS_RSA_PUBLIC, digest, 0, hash_result, result_str ) == result );

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