diff options
Diffstat (limited to 'programs/pkey/rsa_decrypt.c')
| -rw-r--r-- | programs/pkey/rsa_decrypt.c | 174 |
1 files changed, 77 insertions, 97 deletions
diff --git a/programs/pkey/rsa_decrypt.c b/programs/pkey/rsa_decrypt.c index 783f3ca54..76bfddf5c 100644 --- a/programs/pkey/rsa_decrypt.c +++ b/programs/pkey/rsa_decrypt.c @@ -2,19 +2,7 @@ * RSA simple decryption program * * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the "License"); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. + * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ #include "mbedtls/build_info.h" @@ -35,17 +23,17 @@ #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) || \ !defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_ENTROPY_C) || \ !defined(MBEDTLS_CTR_DRBG_C) -int main( void ) +int main(void) { mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or " - "MBEDTLS_FS_IO and/or MBEDTLS_ENTROPY_C and/or " - "MBEDTLS_CTR_DRBG_C not defined.\n"); - mbedtls_exit( 0 ); + "MBEDTLS_FS_IO and/or MBEDTLS_ENTROPY_C and/or " + "MBEDTLS_CTR_DRBG_C not defined.\n"); + mbedtls_exit(0); } #else -int main( int argc, char *argv[] ) +int main(int argc, char *argv[]) { FILE *f; int ret = 1; @@ -61,132 +49,124 @@ int main( int argc, char *argv[] ) const char *pers = "rsa_decrypt"; ((void) argv); - memset(result, 0, sizeof( result ) ); + memset(result, 0, sizeof(result)); - if( argc != 1 ) - { - mbedtls_printf( "usage: rsa_decrypt\n" ); + if (argc != 1) { + mbedtls_printf("usage: rsa_decrypt\n"); #if defined(_WIN32) - mbedtls_printf( "\n" ); + mbedtls_printf("\n"); #endif - mbedtls_exit( exit_code ); + mbedtls_exit(exit_code); } - mbedtls_printf( "\n . Seeding the random number generator..." ); - fflush( stdout ); - - mbedtls_rsa_init( &rsa ); - mbedtls_ctr_drbg_init( &ctr_drbg ); - 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 ); - - ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, - &entropy, (const unsigned char *) pers, - strlen( pers ) ); - if( ret != 0 ) - { - mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", - ret ); + mbedtls_printf("\n . Seeding the random number generator..."); + fflush(stdout); + + mbedtls_rsa_init(&rsa); + mbedtls_ctr_drbg_init(&ctr_drbg); + 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); + + ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, + &entropy, (const unsigned char *) pers, + strlen(pers)); + if (ret != 0) { + mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d\n", + ret); goto exit; } - mbedtls_printf( "\n . Reading private key from rsa_priv.txt" ); - fflush( stdout ); + mbedtls_printf("\n . Reading private key from rsa_priv.txt"); + fflush(stdout); - if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL ) - { - mbedtls_printf( " failed\n ! Could not open rsa_priv.txt\n" \ - " ! Please run rsa_genkey first\n\n" ); + if ((f = fopen("rsa_priv.txt", "rb")) == NULL) { + mbedtls_printf(" failed\n ! Could not open rsa_priv.txt\n" \ + " ! Please run rsa_genkey first\n\n"); goto exit; } - if( ( ret = mbedtls_mpi_read_file( &N , 16, f ) ) != 0 || - ( ret = mbedtls_mpi_read_file( &E , 16, f ) ) != 0 || - ( ret = mbedtls_mpi_read_file( &D , 16, f ) ) != 0 || - ( ret = mbedtls_mpi_read_file( &P , 16, f ) ) != 0 || - ( ret = mbedtls_mpi_read_file( &Q , 16, f ) ) != 0 || - ( ret = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 || - ( ret = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 || - ( ret = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 ) - { - mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", - ret ); - fclose( f ); + if ((ret = mbedtls_mpi_read_file(&N, 16, f)) != 0 || + (ret = mbedtls_mpi_read_file(&E, 16, f)) != 0 || + (ret = mbedtls_mpi_read_file(&D, 16, f)) != 0 || + (ret = mbedtls_mpi_read_file(&P, 16, f)) != 0 || + (ret = mbedtls_mpi_read_file(&Q, 16, f)) != 0 || + (ret = mbedtls_mpi_read_file(&DP, 16, f)) != 0 || + (ret = mbedtls_mpi_read_file(&DQ, 16, f)) != 0 || + (ret = mbedtls_mpi_read_file(&QP, 16, f)) != 0) { + mbedtls_printf(" failed\n ! mbedtls_mpi_read_file returned %d\n\n", + ret); + fclose(f); goto exit; } - fclose( f ); + fclose(f); - if( ( ret = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 ) - { - mbedtls_printf( " failed\n ! mbedtls_rsa_import returned %d\n\n", - ret ); + if ((ret = mbedtls_rsa_import(&rsa, &N, &P, &Q, &D, &E)) != 0) { + mbedtls_printf(" failed\n ! mbedtls_rsa_import returned %d\n\n", + ret); goto exit; } - if( ( ret = mbedtls_rsa_complete( &rsa ) ) != 0 ) - { - mbedtls_printf( " failed\n ! mbedtls_rsa_complete returned %d\n\n", - ret ); + if ((ret = mbedtls_rsa_complete(&rsa)) != 0) { + mbedtls_printf(" failed\n ! mbedtls_rsa_complete returned %d\n\n", + ret); goto exit; } /* * Extract the RSA encrypted value from the text file */ - if( ( f = fopen( "result-enc.txt", "rb" ) ) == NULL ) - { - mbedtls_printf( "\n ! Could not open %s\n\n", "result-enc.txt" ); + if ((f = fopen("result-enc.txt", "rb")) == NULL) { + mbedtls_printf("\n ! Could not open %s\n\n", "result-enc.txt"); goto exit; } i = 0; - while( fscanf( f, "%02X", (unsigned int*) &c ) > 0 && - i < (int) sizeof( buf ) ) + while (fscanf(f, "%02X", (unsigned int *) &c) > 0 && + i < (int) sizeof(buf)) { buf[i++] = (unsigned char) c; + } - fclose( f ); + fclose(f); - if( i != rsa.MBEDTLS_PRIVATE(len) ) - { - mbedtls_printf( "\n ! Invalid RSA signature format\n\n" ); + if (i != rsa.MBEDTLS_PRIVATE(len)) { + mbedtls_printf("\n ! Invalid RSA signature format\n\n"); goto exit; } /* * Decrypt the encrypted RSA data and print the result. */ - mbedtls_printf( "\n . Decrypting the encrypted data" ); - fflush( stdout ); - - ret = mbedtls_rsa_pkcs1_decrypt( &rsa, mbedtls_ctr_drbg_random, - &ctr_drbg, &i, - buf, result, 1024 ); - if( ret != 0 ) - { - mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_decrypt returned %d\n\n", - ret ); + mbedtls_printf("\n . Decrypting the encrypted data"); + fflush(stdout); + + ret = mbedtls_rsa_pkcs1_decrypt(&rsa, mbedtls_ctr_drbg_random, + &ctr_drbg, &i, + buf, result, 1024); + if (ret != 0) { + mbedtls_printf(" failed\n ! mbedtls_rsa_pkcs1_decrypt returned %d\n\n", + ret); goto exit; } - mbedtls_printf( "\n . OK\n\n" ); + mbedtls_printf("\n . OK\n\n"); - 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: - mbedtls_ctr_drbg_free( &ctr_drbg ); - mbedtls_entropy_free( &entropy ); - 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 ); - - mbedtls_exit( exit_code ); + mbedtls_ctr_drbg_free(&ctr_drbg); + mbedtls_entropy_free(&entropy); + 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); + + mbedtls_exit(exit_code); } #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_FS_IO */ |