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Adapt rsa_decrypt example program to new RSA interface

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This commit is contained in:
Hanno Becker 2017-08-23 06:46:45 +01:00
parent 40371ec783
commit ccef18c2ff
1 changed files with 38 additions and 12 deletions
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50
programs/pkey/rsa_decrypt.c
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@ -64,6 +64,7 @@ int main( int argc, char *argv[] )
int return_val, exit_val, c; int return_val, exit_val, c;
size_t i; size_t i;
mbedtls_rsa_context rsa; mbedtls_rsa_context rsa;
mbedtls_mpi N, P, Q, D, E, DP, DQ, QP;
mbedtls_entropy_context entropy; mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg; mbedtls_ctr_drbg_context ctr_drbg;
unsigned char result[1024]; unsigned char result[1024];
@ -91,6 +92,9 @@ int main( int argc, char *argv[] )
mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 ); mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
mbedtls_ctr_drbg_init( &ctr_drbg ); mbedtls_ctr_drbg_init( &ctr_drbg );
mbedtls_entropy_init( &entropy ); mbedtls_entropy_init( &entropy );
mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P ); mbedtls_mpi_init( &Q );
mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP );
mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
return_val = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, return_val = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
&entropy, (const unsigned char *) pers, &entropy, (const unsigned char *) pers,
@ -114,14 +118,14 @@ int main( int argc, char *argv[] )
goto exit; goto exit;
} }
if( ( return_val = mbedtls_mpi_read_file( &rsa.N , 16, f ) ) != 0 || if( ( return_val = mbedtls_mpi_read_file( &N , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &rsa.E , 16, f ) ) != 0 || ( return_val = mbedtls_mpi_read_file( &E , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &rsa.D , 16, f ) ) != 0 || ( return_val = mbedtls_mpi_read_file( &D , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &rsa.P , 16, f ) ) != 0 || ( return_val = mbedtls_mpi_read_file( &P , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &rsa.Q , 16, f ) ) != 0 || ( return_val = mbedtls_mpi_read_file( &Q , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &rsa.DP, 16, f ) ) != 0 || ( return_val = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &rsa.DQ, 16, f ) ) != 0 || ( return_val = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &rsa.QP, 16, f ) ) != 0 ) ( return_val = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 )
{ {
exit_val = MBEDTLS_EXIT_FAILURE; exit_val = MBEDTLS_EXIT_FAILURE;
mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n",
@ -129,11 +133,31 @@ int main( int argc, char *argv[] )
fclose( f ); fclose( f );
goto exit; goto exit;
} }
rsa.len = ( mbedtls_mpi_bitlen( &rsa.N ) + 7 ) >> 3;
fclose( f ); fclose( f );
if( ( return_val = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_rsa_import returned %d\n\n",
return_val );
goto exit;
}
if( ( return_val = mbedtls_rsa_complete( &rsa, mbedtls_ctr_drbg_random,
&ctr_drbg ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_rsa_complete returned %d\n\n",
return_val );
goto exit;
}
/* Although we're not using them, verify CRT parameters */
if( ( return_val = mbedtls_rsa_check_crt( &rsa, &DP, &DQ, &QP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_rsa_check_crt returned %d\n\n",
return_val );
goto exit;
}
/* /*
* Extract the RSA encrypted value from the text file * Extract the RSA encrypted value from the text file
*/ */
@ -184,6 +208,9 @@ exit:
mbedtls_ctr_drbg_free( &ctr_drbg ); mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy ); mbedtls_entropy_free( &entropy );
mbedtls_rsa_free( &rsa ); mbedtls_rsa_free( &rsa );
mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP );
mbedtls_mpi_free( &DQ ); mbedtls_mpi_free( &QP );
#if defined(_WIN32) #if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" ); mbedtls_printf( " + Press Enter to exit this program.\n" );
@ -193,4 +220,3 @@ exit:
return( exit_val ); return( exit_val );
} }
#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_FS_IO */ #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_FS_IO */