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

#include "legacy_or_psa.h"
/* END_HEADER */

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

/* BEGIN_CASE */
void pkcs1_rsaes_v15_encrypt( int mod, char * input_N,
                              char * input_E, int hash,
                              data_t * message_str, data_t * rnd_buf,
                              data_t * result_str, int result )
{
    unsigned char output[128];
    mbedtls_rsa_context ctx;
    mbedtls_test_rnd_buf_info info;
    mbedtls_mpi N, E;

    info.fallback_f_rng = mbedtls_test_rnd_std_rand;
    info.fallback_p_rng = NULL;
    info.buf = rnd_buf->x;
    info.length = rnd_buf->len;

    mbedtls_mpi_init( &N ); mbedtls_mpi_init( &E );
    mbedtls_rsa_init( &ctx );
    TEST_ASSERT( mbedtls_rsa_set_padding( &ctx,
                                          MBEDTLS_RSA_PKCS_V15, hash ) == 0 );
    memset( output, 0x00, sizeof( output ) );

    TEST_ASSERT( mbedtls_test_read_mpi( &N, input_N ) == 0 );
    TEST_ASSERT( mbedtls_test_read_mpi( &E, input_E ) == 0 );
    TEST_ASSERT( mbedtls_rsa_import( &ctx, &N, NULL, NULL, NULL, &E ) == 0 );
    TEST_ASSERT( mbedtls_rsa_get_len( &ctx ) == (size_t) ( ( mod + 7 ) / 8 ) );
    TEST_ASSERT( mbedtls_rsa_check_pubkey( &ctx ) == 0 );

    if( message_str->len == 0 )
        message_str->x = NULL;
    TEST_ASSERT( mbedtls_rsa_pkcs1_encrypt( &ctx,
                                            &mbedtls_test_rnd_buffer_rand,
                                            &info, message_str->len,
                                            message_str->x,
                                            output ) == result );

    if( result == 0 )
    {
        TEST_ASSERT( mbedtls_test_hexcmp( output, result_str->x,
                                          ctx.len, result_str->len ) == 0 );
    }

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

/* BEGIN_CASE */
void pkcs1_rsaes_v15_decrypt( int mod, char * input_P, char * input_Q,
                              char * input_N, char * input_E, int hash,
                              data_t * result_str, char * seed,
                              data_t * message_str, int result )
{
    unsigned char output[128];
    mbedtls_rsa_context ctx;
    size_t output_len;
    mbedtls_test_rnd_pseudo_info rnd_info;
    mbedtls_mpi N, P, Q, E;
    ((void) seed);

    mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P );
    mbedtls_mpi_init( &Q ); mbedtls_mpi_init( &E );
    mbedtls_rsa_init( &ctx );
    TEST_ASSERT( mbedtls_rsa_set_padding( &ctx,
                                          MBEDTLS_RSA_PKCS_V15, hash ) == 0 );

    memset( output, 0x00, sizeof( output ) );
    memset( &rnd_info, 0, sizeof( mbedtls_test_rnd_pseudo_info ) );

    TEST_ASSERT( mbedtls_test_read_mpi( &P, input_P ) == 0 );
    TEST_ASSERT( mbedtls_test_read_mpi( &Q, input_Q ) == 0 );
    TEST_ASSERT( mbedtls_test_read_mpi( &N, input_N ) == 0 );
    TEST_ASSERT( mbedtls_test_read_mpi( &E, input_E ) == 0 );

    TEST_ASSERT( mbedtls_rsa_import( &ctx, &N, &P, &Q, NULL, &E ) == 0 );
    TEST_ASSERT( mbedtls_rsa_get_len( &ctx ) == (size_t) ( ( mod + 7 ) / 8 ) );
    TEST_ASSERT( mbedtls_rsa_complete( &ctx ) == 0 );
    TEST_ASSERT( mbedtls_rsa_check_privkey( &ctx ) == 0 );

    if( result_str->len == 0 )
    {
        TEST_ASSERT( mbedtls_rsa_pkcs1_decrypt( &ctx,
                                                &mbedtls_test_rnd_pseudo_rand,
                                                &rnd_info,
                                                &output_len, message_str->x,
                                                NULL, 0 ) == result );
    }
    else
    {
        TEST_ASSERT( mbedtls_rsa_pkcs1_decrypt( &ctx,
                                                &mbedtls_test_rnd_pseudo_rand,
                                                &rnd_info,
                                                &output_len, message_str->x,
                                                output, 1000 ) == result );
        if( result == 0 )
        {
            TEST_ASSERT( mbedtls_test_hexcmp( output, result_str->x,
                                              output_len,
                                              result_str->len) == 0 );
        }
    }

exit:
    mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P );
    mbedtls_mpi_free( &Q ); mbedtls_mpi_free( &E );
    mbedtls_rsa_free( &ctx );
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_v15_decode( data_t *input,
                       int expected_plaintext_length_arg,
                       int output_size_arg,
                       int expected_result )
{
    size_t expected_plaintext_length = expected_plaintext_length_arg;
    size_t output_size = output_size_arg;
    mbedtls_test_rnd_pseudo_info rnd_info;
    mbedtls_mpi Nmpi, Empi, Pmpi, Qmpi;
    mbedtls_rsa_context ctx;
    static unsigned char N[128] = {
        0xc4, 0x79, 0x4c, 0x6d, 0xb2, 0xe9, 0xdf, 0xc5,
        0xe5, 0xd7, 0x55, 0x4b, 0xfb, 0x6c, 0x2e, 0xec,
        0x84, 0xd0, 0x88, 0x12, 0xaf, 0xbf, 0xb4, 0xf5,
        0x47, 0x3c, 0x7e, 0x92, 0x4c, 0x58, 0xc8, 0x73,
        0xfe, 0x8f, 0x2b, 0x8f, 0x8e, 0xc8, 0x5c, 0xf5,
        0x05, 0xeb, 0xfb, 0x0d, 0x7b, 0x2a, 0x93, 0xde,
        0x15, 0x0d, 0xc8, 0x13, 0xcf, 0xd2, 0x6f, 0x0d,
        0x9d, 0xad, 0x30, 0xe5, 0x70, 0x20, 0x92, 0x9e,
        0xb3, 0x6b, 0xba, 0x5c, 0x50, 0x0f, 0xc3, 0xb2,
        0x7e, 0x64, 0x07, 0x94, 0x7e, 0xc9, 0x4e, 0xc1,
        0x65, 0x04, 0xaf, 0xb3, 0x9f, 0xde, 0xa8, 0x46,
        0xfa, 0x6c, 0xf3, 0x03, 0xaf, 0x1c, 0x1b, 0xec,
        0x75, 0x44, 0x66, 0x77, 0xc9, 0xde, 0x51, 0x33,
        0x64, 0x27, 0xb0, 0xd4, 0x8d, 0x31, 0x6a, 0x11,
        0x27, 0x3c, 0x99, 0xd4, 0x22, 0xc0, 0x9d, 0x12,
        0x01, 0xc7, 0x4a, 0x73, 0xac, 0xbf, 0xc2, 0xbb
    };
    static unsigned char E[1] = { 0x03 };
    static unsigned char P[64] = {
        0xe5, 0x53, 0x1f, 0x88, 0x51, 0xee, 0x59, 0xf8,
        0xc1, 0xe4, 0xcc, 0x5b, 0xb3, 0x75, 0x8d, 0xc8,
        0xe8, 0x95, 0x2f, 0xd0, 0xef, 0x37, 0xb4, 0xcd,
        0xd3, 0x9e, 0x48, 0x8b, 0x81, 0x58, 0x60, 0xb9,
        0x27, 0x1d, 0xb6, 0x28, 0x92, 0x64, 0xa3, 0xa5,
        0x64, 0xbd, 0xcc, 0x53, 0x68, 0xdd, 0x3e, 0x55,
        0xea, 0x9d, 0x5e, 0xcd, 0x1f, 0x96, 0x87, 0xf1,
        0x29, 0x75, 0x92, 0x70, 0x8f, 0x28, 0xfb, 0x2b
    };
    static unsigned char Q[64] = {
        0xdb, 0x53, 0xef, 0x74, 0x61, 0xb4, 0x20, 0x3b,
        0x3b, 0x87, 0x76, 0x75, 0x81, 0x56, 0x11, 0x03,
        0x59, 0x31, 0xe3, 0x38, 0x4b, 0x8c, 0x7a, 0x9c,
        0x05, 0xd6, 0x7f, 0x1e, 0x5e, 0x60, 0xf0, 0x4e,
        0x0b, 0xdc, 0x34, 0x54, 0x1c, 0x2e, 0x90, 0x83,
        0x14, 0xef, 0xc0, 0x96, 0x5c, 0x30, 0x10, 0xcc,
        0xc1, 0xba, 0xa0, 0x54, 0x3f, 0x96, 0x24, 0xca,
        0xa3, 0xfb, 0x55, 0xbc, 0x71, 0x29, 0x4e, 0xb1
    };
    unsigned char original[128];
    unsigned char intermediate[128];
    static unsigned char default_content[128] = {
        /* A randomly generated pattern. */
        0x4c, 0x27, 0x54, 0xa0, 0xce, 0x0d, 0x09, 0x4a,
        0x1c, 0x38, 0x8e, 0x2d, 0xa3, 0xc4, 0xe0, 0x19,
        0x4c, 0x99, 0xb2, 0xbf, 0xe6, 0x65, 0x7e, 0x58,
        0xd7, 0xb6, 0x8a, 0x05, 0x2f, 0xa5, 0xec, 0xa4,
        0x35, 0xad, 0x10, 0x36, 0xff, 0x0d, 0x08, 0x50,
        0x74, 0x47, 0xc9, 0x9c, 0x4a, 0xe7, 0xfd, 0xfa,
        0x83, 0x5f, 0x14, 0x5a, 0x1e, 0xe7, 0x35, 0x08,
        0xad, 0xf7, 0x0d, 0x86, 0xdf, 0xb8, 0xd4, 0xcf,
        0x32, 0xb9, 0x5c, 0xbe, 0xa3, 0xd2, 0x89, 0x70,
        0x7b, 0xc6, 0x48, 0x7e, 0x58, 0x4d, 0xf3, 0xef,
        0x34, 0xb7, 0x57, 0x54, 0x79, 0xc5, 0x8e, 0x0a,
        0xa3, 0xbf, 0x6d, 0x42, 0x83, 0x25, 0x13, 0xa2,
        0x95, 0xc0, 0x0d, 0x32, 0xec, 0x77, 0x91, 0x2b,
        0x68, 0xb6, 0x8c, 0x79, 0x15, 0xfb, 0x94, 0xde,
        0xb9, 0x2b, 0x94, 0xb3, 0x28, 0x23, 0x86, 0x3d,
        0x37, 0x00, 0xe6, 0xf1, 0x1f, 0x4e, 0xd4, 0x42
    };
    unsigned char final[128];
    size_t output_length = 0x7EA0;

    memset( &rnd_info, 0, sizeof( mbedtls_test_rnd_pseudo_info ) );
    mbedtls_mpi_init( &Nmpi ); mbedtls_mpi_init( &Empi );
    mbedtls_mpi_init( &Pmpi ); mbedtls_mpi_init( &Qmpi );
    mbedtls_rsa_init( &ctx );

    TEST_ASSERT( mbedtls_mpi_read_binary( &Nmpi, N, sizeof( N ) ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_binary( &Empi, E, sizeof( E ) ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_binary( &Pmpi, P, sizeof( P ) ) == 0 );
    TEST_ASSERT( mbedtls_mpi_read_binary( &Qmpi, Q, sizeof( Q ) ) == 0 );

    TEST_ASSERT( mbedtls_rsa_import( &ctx, &Nmpi, &Pmpi, &Qmpi,
                                     NULL, &Empi ) == 0 );
    TEST_ASSERT( mbedtls_rsa_complete( &ctx ) == 0 );

    TEST_ASSERT( input->len <= sizeof( N ) );
    memcpy( original, input->x, input->len );
    memset( original + input->len, 'd', sizeof( original ) - input->len );
    TEST_ASSERT( mbedtls_rsa_public( &ctx, original, intermediate ) == 0 );

    memcpy( final, default_content, sizeof( final ) );
    TEST_ASSERT( mbedtls_rsa_pkcs1_decrypt( &ctx,
                                            &mbedtls_test_rnd_pseudo_rand,
                                            &rnd_info, &output_length,
                                            intermediate, final,
                                            output_size ) == expected_result );
    if( expected_result == 0 )
    {
        TEST_ASSERT( output_length == expected_plaintext_length );
        TEST_ASSERT( memcmp( original + sizeof( N ) - output_length,
                             final,
                             output_length ) == 0 );
    }
    else if( expected_result == MBEDTLS_ERR_RSA_INVALID_PADDING ||
             expected_result == MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE )
    {
        size_t max_payload_length =
            output_size > sizeof( N ) - 11 ? sizeof( N ) - 11 : output_size;
        size_t i;
        size_t count = 0;

#if !defined(MBEDTLS_RSA_ALT)
        /* Check that the output in invalid cases is what the default
         * implementation currently does. Alternative implementations
         * may produce different output, so we only perform these precise
         * checks when using the default implementation. */
        TEST_ASSERT( output_length == max_payload_length );
        for( i = 0; i < max_payload_length; i++ )
            TEST_ASSERT( final[i] == 0 );
#endif
        /* Even in alternative implementations, the outputs must have
         * changed, otherwise it indicates at least a timing vulnerability
         * because no write to the outputs is performed in the bad case. */
        TEST_ASSERT( output_length != 0x7EA0 );
        for( i = 0; i < max_payload_length; i++ )
            count += ( final[i] == default_content[i] );
        /* If more than 16 bytes are unchanged in final, that's evidence
         * that final wasn't overwritten. */
        TEST_ASSERT( count < 16 );
    }

exit:
    mbedtls_mpi_free( &Nmpi ); mbedtls_mpi_free( &Empi );
    mbedtls_mpi_free( &Pmpi ); mbedtls_mpi_free( &Qmpi );
    mbedtls_rsa_free( &ctx );
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_rsassa_v15_sign( int mod, char * input_P,
                            char * input_Q, char * input_N,
                            char * input_E, int digest, int hash,
                            data_t * message_str, data_t * rnd_buf,
                            data_t * result_str, int result )
{
    unsigned char output[128];
    mbedtls_rsa_context ctx;
    mbedtls_mpi N, P, Q, E;
    mbedtls_test_rnd_buf_info info;

    info.fallback_f_rng = mbedtls_test_rnd_std_rand;
    info.fallback_p_rng = NULL;
    info.buf = rnd_buf->x;
    info.length = rnd_buf->len;

    mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P );
    mbedtls_mpi_init( &Q ); mbedtls_mpi_init( &E );
    mbedtls_rsa_init( &ctx );
    TEST_ASSERT( mbedtls_rsa_set_padding( &ctx,
                                          MBEDTLS_RSA_PKCS_V15, hash ) == 0 );

    memset( output, 0x00, sizeof( output ) );

    TEST_ASSERT( mbedtls_test_read_mpi( &P, input_P ) == 0 );
    TEST_ASSERT( mbedtls_test_read_mpi( &Q, input_Q ) == 0 );
    TEST_ASSERT( mbedtls_test_read_mpi( &N, input_N ) == 0 );
    TEST_ASSERT( mbedtls_test_read_mpi( &E, input_E ) == 0 );

    TEST_ASSERT( mbedtls_rsa_import( &ctx, &N, &P, &Q, NULL, &E ) == 0 );
    TEST_ASSERT( mbedtls_rsa_get_len( &ctx ) == (size_t) ( ( mod + 7 ) / 8 ) );
    TEST_ASSERT( mbedtls_rsa_complete( &ctx ) == 0 );
    TEST_ASSERT( mbedtls_rsa_check_privkey( &ctx ) == 0 );

    TEST_ASSERT( mbedtls_rsa_pkcs1_sign(
                     &ctx, &mbedtls_test_rnd_buffer_rand, &info,
                     digest, message_str->len, message_str->x,
                     output ) == result );
    if( result == 0 )
    {

        TEST_ASSERT( mbedtls_test_hexcmp( output, result_str->x,
                                          ctx.len, result_str->len ) == 0 );
    }

exit:
    mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P );
    mbedtls_mpi_free( &Q ); mbedtls_mpi_free( &E );
    mbedtls_rsa_free( &ctx );
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_rsassa_v15_verify( int mod, char * input_N, char * input_E,
                              int digest, int hash, data_t * message_str,
                              char * salt, data_t * result_str, int result )
{
    mbedtls_rsa_context ctx;
    mbedtls_mpi N, E;
    ((void) salt);

    mbedtls_mpi_init( &N ); mbedtls_mpi_init( &E );
    mbedtls_rsa_init( &ctx );
    TEST_ASSERT( mbedtls_rsa_set_padding( &ctx,
                                          MBEDTLS_RSA_PKCS_V15, hash ) == 0 );

    TEST_ASSERT( mbedtls_test_read_mpi( &N, input_N ) == 0 );
    TEST_ASSERT( mbedtls_test_read_mpi( &E, input_E ) == 0 );
    TEST_ASSERT( mbedtls_rsa_import( &ctx, &N, NULL, NULL, NULL, &E ) == 0 );
    TEST_ASSERT( mbedtls_rsa_get_len( &ctx ) == (size_t) ( ( mod + 7 ) / 8 ) );
    TEST_ASSERT( mbedtls_rsa_check_pubkey( &ctx ) == 0 );

    TEST_ASSERT( mbedtls_rsa_pkcs1_verify( &ctx, digest, message_str->len, message_str->x, result_str->x ) == result );

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