Key generation tool
This commit is contained in:
Paul Bakker
parent
649854004b
commit
15b9b3a7e0
1
programs/.gitignore
vendored
1
programs/.gitignore
vendored
@ -10,6 +10,7 @@ pkey/dh_client
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pkey/dh_genprime
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pkey/dh_server
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pkey/ecdsa
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pkey/gen_key
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pkey/key_app
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pkey/key_app_writer
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pkey/mpi_demo
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@ -25,6 +25,7 @@ APPS = aes/aescrypt2 aes/crypt_and_hash \
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hash/md5sum hash/sha1sum \
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hash/sha2sum pkey/dh_client \
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pkey/dh_genprime pkey/dh_server \
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pkey/gen_key \
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pkey/key_app pkey/key_app_writer \
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pkey/mpi_demo pkey/pk_decrypt \
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pkey/pk_encrypt pkey/pk_sign \
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@ -96,6 +97,10 @@ pkey/ecdsa: pkey/ecdsa.c ../library/libpolarssl.a
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echo " CC pkey/ecdsa.c"
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$(CC) $(CFLAGS) $(OFLAGS) pkey/ecdsa.c $(LDFLAGS) -o $@
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pkey/gen_key: pkey/gen_key.c ../library/libpolarssl.a
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echo " CC pkey/gen_key.c"
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$(CC) $(CFLAGS) $(OFLAGS) pkey/gen_key.c $(LDFLAGS) -o $@
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pkey/key_app: pkey/key_app.c ../library/libpolarssl.a
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echo " CC pkey/key_app.c"
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$(CC) $(CFLAGS) $(OFLAGS) pkey/key_app.c $(LDFLAGS) -o $@
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@ -10,6 +10,9 @@ target_link_libraries(dh_server polarssl)
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add_executable(ecdsa ecdsa.c)
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target_link_libraries(ecdsa polarssl)
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add_executable(gen_key gen_key.c)
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target_link_libraries(gen_key polarssl)
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add_executable(key_app key_app.c)
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target_link_libraries(key_app polarssl)
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@ -52,6 +55,6 @@ target_link_libraries(pk_encrypt polarssl)
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add_executable(pk_decrypt pk_decrypt.c)
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target_link_libraries(pk_decrypt polarssl)
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install(TARGETS dh_client dh_genprime dh_server key_app mpi_demo rsa_genkey rsa_sign rsa_verify rsa_encrypt rsa_decrypt pk_encrypt pk_decrypt pk_sign pk_verify
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install(TARGETS dh_client dh_genprime dh_server key_app mpi_demo rsa_genkey rsa_sign rsa_verify rsa_encrypt rsa_decrypt pk_encrypt pk_decrypt pk_sign pk_verify gen_key
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DESTINATION "bin"
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PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
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280
programs/pkey/gen_key.c
Normal file
280
programs/pkey/gen_key.c
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@ -0,0 +1,280 @@
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/*
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* Key generation application
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "polarssl/config.h"
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "polarssl/error.h"
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#include "polarssl/pk.h"
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#include "polarssl/ecdsa.h"
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#include "polarssl/rsa.h"
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#include "polarssl/error.h"
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#include "polarssl/entropy.h"
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#include "polarssl/ctr_drbg.h"
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#if !defined(POLARSSL_PK_WRITE_C) || !defined(POLARSSL_FS_IO) || \
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!defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_CTR_DRBG_C)
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int main( int argc, char *argv[] )
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{
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((void) argc);
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((void) argv);
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printf( "POLARSSL_PK_WRITE_C and/or POLARSSL_FS_IO and/or "
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"POLARSSL_ENTROPY_C and/or POLARSSL_CTR_DRBG_C "
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"not defined.\n" );
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return( 0 );
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}
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#else
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#define TYPE_RSA 0
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#define FORMAT_PEM 0
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#define FORMAT_DER 1
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#define DFL_TYPE TYPE_RSA
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#define DFL_RSA_KEYSIZE 4096
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#define DFL_FILENAME "keyfile.key"
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#define DFL_FORMAT FORMAT_PEM
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/*
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* global options
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*/
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struct options
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{
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int type; /* the type of key to generate */
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int rsa_keysize; /* length of key in bits */
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const char *filename; /* filename of the key file */
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int format; /* the output format to use */
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} opt;
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static int write_private_key( pk_context *key, const char *output_file )
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{
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int ret;
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FILE *f;
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unsigned char output_buf[16000];
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unsigned char *c = output_buf;
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size_t len = 0;
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memset(output_buf, 0, 16000);
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if( opt.format == FORMAT_PEM )
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{
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if( ( ret = pk_write_key_pem( key, output_buf, 16000 ) ) != 0 )
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return( ret );
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len = strlen( (char *) output_buf );
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}
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else
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{
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if( ( ret = pk_write_key_der( key, output_buf, 16000 ) ) < 0 )
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return( ret );
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len = ret;
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c = output_buf + sizeof(output_buf) - len - 1;
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}
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if( ( f = fopen( output_file, "w" ) ) == NULL )
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return( -1 );
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if( fwrite( c, 1, len, f ) != len )
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return( -1 );
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fclose(f);
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return( 0 );
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}
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#define USAGE \
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"\n usage: gen_key param=<>...\n" \
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"\n acceptable parameters:\n" \
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" type=rsa default: rsa\n" \
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" rsa_keysize=%%d default: 4096\n" \
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" filename=%%s default: keyfile.key\n" \
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" format=pem|der default: pem\n" \
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"\n"
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int main( int argc, char *argv[] )
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{
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int ret = 0;
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pk_context key;
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char buf[1024];
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int i;
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char *p, *q;
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entropy_context entropy;
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ctr_drbg_context ctr_drbg;
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const char *pers = "gen_key";
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/*
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* Set to sane values
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*/
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pk_init( &key );
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memset( buf, 0, sizeof( buf ) );
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if( argc == 0 )
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{
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usage:
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ret = 1;
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printf( USAGE );
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goto exit;
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}
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opt.type = DFL_TYPE;
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opt.rsa_keysize = DFL_RSA_KEYSIZE;
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opt.filename = DFL_FILENAME;
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opt.format = DFL_FORMAT;
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for( i = 1; i < argc; i++ )
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{
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p = argv[i];
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if( ( q = strchr( p, '=' ) ) == NULL )
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goto usage;
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*q++ = '\0';
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if( strcmp( p, "type" ) == 0 )
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{
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if( strcmp( q, "rsa" ) == 0 )
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opt.type = TYPE_RSA;
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else
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goto usage;
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}
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else if( strcmp( p, "format" ) == 0 )
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{
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if( strcmp( q, "pem" ) == 0 )
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opt.format = FORMAT_PEM;
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else if( strcmp( q, "der" ) == 0 )
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opt.format = FORMAT_DER;
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else
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goto usage;
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}
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else if( strcmp( p, "rsa_keysize" ) == 0 )
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{
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opt.rsa_keysize = atoi( q );
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if( opt.rsa_keysize < 1024 || opt.rsa_keysize > 8192 )
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goto usage;
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}
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else if( strcmp( p, "filename" ) == 0 )
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opt.filename = q;
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else
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goto usage;
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}
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printf( "\n . Seeding the random number generator..." );
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fflush( stdout );
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entropy_init( &entropy );
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if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
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(const unsigned char *) pers,
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strlen( pers ) ) ) != 0 )
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{
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printf( " failed\n ! ctr_drbg_init returned -0x%04x\n", -ret );
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goto exit;
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}
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/*
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* 1.1. Generate the key
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*/
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printf( "\n . Generating the private key ..." );
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fflush( stdout );
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#if defined(POLARSSL_RSA_C) && defined(POLARSSL_GENPRIME)
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if( opt.type == TYPE_RSA )
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{
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pk_init_ctx( &key, pk_info_from_type( POLARSSL_PK_RSA ) );
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ret = rsa_gen_key( pk_rsa( key ), ctr_drbg_random, &ctr_drbg,
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opt.rsa_keysize, 65537 );
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if( ret != 0 )
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{
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printf( " failed\n ! rsa_gen_key returned -0x%04x", -ret );
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goto exit;
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}
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printf( " ok\n" );
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}
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else
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#endif /* POLARSSL_RSA_C */
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{
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printf( " failed\n ! key type not supported in library" );
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goto exit;
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}
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/*
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* 1.2 Print the key
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*/
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printf( " . Key information ...\n" );
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#if defined(POLARSSL_RSA_C)
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if( pk_get_type( &key ) == POLARSSL_PK_RSA )
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{
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rsa_context *rsa = pk_rsa( key );
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mpi_write_file( "N: ", &rsa->N, 16, NULL );
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mpi_write_file( "E: ", &rsa->E, 16, NULL );
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mpi_write_file( "D: ", &rsa->D, 16, NULL );
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mpi_write_file( "P: ", &rsa->P, 16, NULL );
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mpi_write_file( "Q: ", &rsa->Q, 16, NULL );
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mpi_write_file( "DP: ", &rsa->DP, 16, NULL );
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mpi_write_file( "DQ: ", &rsa->DQ, 16, NULL );
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mpi_write_file( "QP: ", &rsa->QP, 16, NULL );
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}
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else
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#endif
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#if defined(POLARSSL_ECP_C)
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if( pk_get_type( &key ) == POLARSSL_PK_ECKEY )
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{
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ecp_keypair *ecp = pk_ec( key );
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mpi_write_file( "Q(X): ", &ecp->Q.X, 16, NULL );
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mpi_write_file( "Q(Y): ", &ecp->Q.Y, 16, NULL );
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mpi_write_file( "Q(Z): ", &ecp->Q.Z, 16, NULL );
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mpi_write_file( "D : ", &ecp->d , 16, NULL );
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}
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else
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#endif
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printf("key type not supported yet\n");
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write_private_key( &key, opt.filename );
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exit:
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if( ret != 0 && ret != 1)
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{
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#ifdef POLARSSL_ERROR_C
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polarssl_strerror( ret, buf, sizeof( buf ) );
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printf( " - %s\n", buf );
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#else
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printf("\n");
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#endif
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}
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pk_free( &key );
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#if defined(_WIN32)
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printf( " + Press Enter to exit this program.\n" );
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fflush( stdout ); getchar();
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#endif
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return( ret );
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}
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#endif /* POLARSSL_PK_WRITE_C && POLARSSL_FS_IO */
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