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Fix ret code in rsa_decrypt.c

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This commit is contained in:
Andres Amaya Garcia 2018-04-30 22:07:15 +01:00
parent 7a9d01ceed
commit 7fe4edf8c0
1 changed files with 29 additions and 32 deletions
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57
programs/pkey/rsa_decrypt.c
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@ -34,7 +34,7 @@
#define mbedtls_exit exit #define mbedtls_exit exit
#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
#endif #endif /* MBEDTLS_PLATFORM_C */
#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_RSA_C) && \ #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_RSA_C) && \
defined(MBEDTLS_FS_IO) && defined(MBEDTLS_ENTROPY_C) && \ defined(MBEDTLS_FS_IO) && defined(MBEDTLS_ENTROPY_C) && \
@ -61,7 +61,9 @@ int main( void )
int main( int argc, char *argv[] ) int main( int argc, char *argv[] )
{ {
FILE *f; FILE *f;
int return_val, exit_val, c; int ret = 1;
int exit_code = MBEDTLS_EXIT_FAILURE;
int 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_mpi N, P, Q, D, E, DP, DQ, QP;
@ -73,7 +75,6 @@ int main( int argc, char *argv[] )
((void) argv); ((void) argv);
memset(result, 0, sizeof( result ) ); memset(result, 0, sizeof( result ) );
exit_val = MBEDTLS_EXIT_SUCCESS;
if( argc != 1 ) if( argc != 1 )
{ {
@ -83,7 +84,7 @@ int main( int argc, char *argv[] )
mbedtls_printf( "\n" ); mbedtls_printf( "\n" );
#endif #endif
mbedtls_exit( MBEDTLS_EXIT_FAILURE ); mbedtls_exit( exit_code );
} }
mbedtls_printf( "\n . Seeding the random number generator..." ); mbedtls_printf( "\n . Seeding the random number generator..." );
@ -96,14 +97,13 @@ int main( int argc, char *argv[] )
mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP ); mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP );
mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP ); mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
return_val = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
&entropy, (const unsigned char *) pers, &entropy, (const unsigned char *) pers,
strlen( pers ) ); strlen( pers ) );
if( return_val != 0 ) if( ret != 0 )
{ {
exit_val = MBEDTLS_EXIT_FAILURE;
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n",
return_val ); ret );
goto exit; goto exit;
} }
@ -112,40 +112,38 @@ int main( int argc, char *argv[] )
if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL ) if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL )
{ {
exit_val = MBEDTLS_EXIT_FAILURE;
mbedtls_printf( " failed\n ! Could not open rsa_priv.txt\n" \ mbedtls_printf( " failed\n ! Could not open rsa_priv.txt\n" \
" ! Please run rsa_genkey first\n\n" ); " ! Please run rsa_genkey first\n\n" );
goto exit; goto exit;
} }
if( ( return_val = mbedtls_mpi_read_file( &N , 16, f ) ) != 0 || if( ( ret = mbedtls_mpi_read_file( &N , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &E , 16, f ) ) != 0 || ( ret = mbedtls_mpi_read_file( &E , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &D , 16, f ) ) != 0 || ( ret = mbedtls_mpi_read_file( &D , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &P , 16, f ) ) != 0 || ( ret = mbedtls_mpi_read_file( &P , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &Q , 16, f ) ) != 0 || ( ret = mbedtls_mpi_read_file( &Q , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 || ( ret = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 || ( ret = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 ||
( return_val = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 ) ( ret = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 )
{ {
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",
return_val ); ret );
fclose( f ); fclose( f );
goto exit; goto exit;
} }
fclose( f ); fclose( f );
if( ( return_val = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 ) if( ( ret = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 )
{ {
mbedtls_printf( " failed\n ! mbedtls_rsa_import returned %d\n\n", mbedtls_printf( " failed\n ! mbedtls_rsa_import returned %d\n\n",
return_val ); ret );
goto exit; goto exit;
} }
if( ( return_val = mbedtls_rsa_complete( &rsa ) ) != 0 ) if( ( ret = mbedtls_rsa_complete( &rsa ) ) != 0 )
{ {
mbedtls_printf( " failed\n ! mbedtls_rsa_complete returned %d\n\n", mbedtls_printf( " failed\n ! mbedtls_rsa_complete returned %d\n\n",
return_val ); ret );
goto exit; goto exit;
} }
@ -154,7 +152,6 @@ int main( int argc, char *argv[] )
*/ */
if( ( f = fopen( "result-enc.txt", "rb" ) ) == NULL ) if( ( f = fopen( "result-enc.txt", "rb" ) ) == NULL )
{ {
exit_val = MBEDTLS_EXIT_FAILURE;
mbedtls_printf( "\n ! Could not open %s\n\n", "result-enc.txt" ); mbedtls_printf( "\n ! Could not open %s\n\n", "result-enc.txt" );
goto exit; goto exit;
} }
@ -169,7 +166,6 @@ int main( int argc, char *argv[] )
if( i != rsa.len ) if( i != rsa.len )
{ {
exit_val = MBEDTLS_EXIT_FAILURE;
mbedtls_printf( "\n ! Invalid RSA signature format\n\n" ); mbedtls_printf( "\n ! Invalid RSA signature format\n\n" );
goto exit; goto exit;
} }
@ -180,14 +176,13 @@ int main( int argc, char *argv[] )
mbedtls_printf( "\n . Decrypting the encrypted data" ); mbedtls_printf( "\n . Decrypting the encrypted data" );
fflush( stdout ); fflush( stdout );
return_val = mbedtls_rsa_pkcs1_decrypt( &rsa, mbedtls_ctr_drbg_random, ret = mbedtls_rsa_pkcs1_decrypt( &rsa, mbedtls_ctr_drbg_random,
&ctr_drbg, MBEDTLS_RSA_PRIVATE, &i, &ctr_drbg, MBEDTLS_RSA_PRIVATE, &i,
buf, result, 1024 ); buf, result, 1024 );
if( return_val != 0 ) if( ret != 0 )
{ {
exit_val = MBEDTLS_EXIT_FAILURE;
mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_decrypt returned %d\n\n", mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_decrypt returned %d\n\n",
return_val ); ret );
goto exit; goto exit;
} }
@ -195,6 +190,8 @@ int main( int argc, char *argv[] )
mbedtls_printf( "The decrypted result is: '%s'\n\n", result ); mbedtls_printf( "The decrypted result is: '%s'\n\n", result );
exit_code = MBEDTLS_EXIT_SUCCESS;
exit: exit:
mbedtls_ctr_drbg_free( &ctr_drbg ); mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy ); mbedtls_entropy_free( &entropy );
@ -208,6 +205,6 @@ exit:
fflush( stdout ); getchar(); fflush( stdout ); getchar();
#endif #endif
return( exit_val ); return( exit_code );
} }
#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_FS_IO */ #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_FS_IO */