mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2024-12-29 09:21:19 +00:00
414 lines
11 KiB
C
414 lines
11 KiB
C
/*
|
|
* Key generation application
|
|
*
|
|
* Copyright (C) 2006-2013, Brainspark B.V.
|
|
*
|
|
* This file is part of PolarSSL (http://www.polarssl.org)
|
|
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#if !defined(POLARSSL_CONFIG_FILE)
|
|
#include "polarssl/config.h"
|
|
#else
|
|
#include POLARSSL_CONFIG_FILE
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
#if !defined(_WIN32) && defined(POLARSSL_FS_IO)
|
|
#include <unistd.h>
|
|
#endif /* !_WIN32 && POLARSSL_FS_IO */
|
|
|
|
#include "polarssl/error.h"
|
|
#include "polarssl/pk.h"
|
|
#include "polarssl/ecdsa.h"
|
|
#include "polarssl/rsa.h"
|
|
#include "polarssl/error.h"
|
|
#include "polarssl/entropy.h"
|
|
#include "polarssl/ctr_drbg.h"
|
|
|
|
#if !defined(POLARSSL_PK_WRITE_C) || !defined(POLARSSL_FS_IO) || \
|
|
!defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_CTR_DRBG_C)
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
((void) argc);
|
|
((void) argv);
|
|
|
|
printf( "POLARSSL_PK_WRITE_C and/or POLARSSL_FS_IO and/or "
|
|
"POLARSSL_ENTROPY_C and/or POLARSSL_CTR_DRBG_C "
|
|
"not defined.\n" );
|
|
return( 0 );
|
|
}
|
|
#else
|
|
|
|
#define FORMAT_PEM 0
|
|
#define FORMAT_DER 1
|
|
|
|
#define DFL_TYPE POLARSSL_PK_RSA
|
|
#define DFL_RSA_KEYSIZE 4096
|
|
#define DFL_EC_CURVE ecp_curve_list()->grp_id
|
|
#define DFL_FILENAME "keyfile.key"
|
|
#define DFL_FORMAT FORMAT_PEM
|
|
#define DFL_USE_DEV_RANDOM 0
|
|
|
|
/*
|
|
* global options
|
|
*/
|
|
struct options
|
|
{
|
|
int type; /* the type of key to generate */
|
|
int rsa_keysize; /* length of key in bits */
|
|
int ec_curve; /* curve identifier for EC keys */
|
|
const char *filename; /* filename of the key file */
|
|
int format; /* the output format to use */
|
|
int use_dev_random; /* use /dev/random as entropy source */
|
|
} opt;
|
|
|
|
#if !defined(_WIN32) && defined(POLARSSL_FS_IO)
|
|
|
|
#define DEV_RANDOM_THRESHOLD 32
|
|
|
|
int dev_random_entropy_poll( void *data, unsigned char *output,
|
|
size_t len, size_t *olen )
|
|
{
|
|
FILE *file;
|
|
size_t ret, left = len;
|
|
unsigned char *p = output;
|
|
((void) data);
|
|
|
|
*olen = 0;
|
|
|
|
file = fopen( "/dev/random", "rb" );
|
|
if( file == NULL )
|
|
return( POLARSSL_ERR_ENTROPY_SOURCE_FAILED );
|
|
|
|
while( left > 0 )
|
|
{
|
|
/* /dev/random can return much less than requested. If so, try again */
|
|
ret = fread( p, 1, left, file );
|
|
if( ret == 0 && ferror( file ) )
|
|
{
|
|
fclose( file );
|
|
return( POLARSSL_ERR_ENTROPY_SOURCE_FAILED );
|
|
}
|
|
|
|
p += ret;
|
|
left -= ret;
|
|
sleep( 1 );
|
|
}
|
|
fclose( file );
|
|
*olen = len;
|
|
|
|
return( 0 );
|
|
}
|
|
#endif /* !_WIN32 && POLARSSL_FS_IO */
|
|
|
|
static int write_private_key( pk_context *key, const char *output_file )
|
|
{
|
|
int ret;
|
|
FILE *f;
|
|
unsigned char output_buf[16000];
|
|
unsigned char *c = output_buf;
|
|
size_t len = 0;
|
|
|
|
memset(output_buf, 0, 16000);
|
|
if( opt.format == FORMAT_PEM )
|
|
{
|
|
if( ( ret = pk_write_key_pem( key, output_buf, 16000 ) ) != 0 )
|
|
return( ret );
|
|
|
|
len = strlen( (char *) output_buf );
|
|
}
|
|
else
|
|
{
|
|
if( ( ret = pk_write_key_der( key, output_buf, 16000 ) ) < 0 )
|
|
return( ret );
|
|
|
|
len = ret;
|
|
c = output_buf + sizeof(output_buf) - len;
|
|
}
|
|
|
|
if( ( f = fopen( output_file, "wb" ) ) == NULL )
|
|
return( -1 );
|
|
|
|
if( fwrite( c, 1, len, f ) != len )
|
|
{
|
|
fclose( f );
|
|
return( -1 );
|
|
}
|
|
|
|
fclose( f );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#if !defined(_WIN32) && defined(POLARSSL_FS_IO)
|
|
#define USAGE_DEV_RANDOM \
|
|
" use_dev_random=0|1 default: 0\n"
|
|
#else
|
|
#define USAGE_DEV_RANDOM ""
|
|
#endif /* !_WIN32 && POLARSSL_FS_IO */
|
|
|
|
#define USAGE \
|
|
"\n usage: gen_key param=<>...\n" \
|
|
"\n acceptable parameters:\n" \
|
|
" type=rsa|ec default: rsa\n" \
|
|
" rsa_keysize=%%d default: 4096\n" \
|
|
" ec_curve=%%s see below\n" \
|
|
" filename=%%s default: keyfile.key\n" \
|
|
" format=pem|der default: pem\n" \
|
|
USAGE_DEV_RANDOM \
|
|
"\n"
|
|
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
int ret = 0;
|
|
pk_context key;
|
|
char buf[1024];
|
|
int i;
|
|
char *p, *q;
|
|
entropy_context entropy;
|
|
ctr_drbg_context ctr_drbg;
|
|
const char *pers = "gen_key";
|
|
#if defined(POLARSSL_ECP_C)
|
|
const ecp_curve_info *curve_info;
|
|
#endif
|
|
|
|
/*
|
|
* Set to sane values
|
|
*/
|
|
pk_init( &key );
|
|
memset( buf, 0, sizeof( buf ) );
|
|
|
|
if( argc == 0 )
|
|
{
|
|
usage:
|
|
ret = 1;
|
|
printf( USAGE );
|
|
#if defined(POLARSSL_ECP_C)
|
|
printf( " availabled ec_curve values:\n" );
|
|
curve_info = ecp_curve_list();
|
|
printf( " %s (default)\n", curve_info->name );
|
|
while( ( ++curve_info )->name != NULL )
|
|
printf( " %s\n", curve_info->name );
|
|
#endif
|
|
goto exit;
|
|
}
|
|
|
|
opt.type = DFL_TYPE;
|
|
opt.rsa_keysize = DFL_RSA_KEYSIZE;
|
|
opt.ec_curve = DFL_EC_CURVE;
|
|
opt.filename = DFL_FILENAME;
|
|
opt.format = DFL_FORMAT;
|
|
opt.use_dev_random = DFL_USE_DEV_RANDOM;
|
|
|
|
for( i = 1; i < argc; i++ )
|
|
{
|
|
p = argv[i];
|
|
if( ( q = strchr( p, '=' ) ) == NULL )
|
|
goto usage;
|
|
*q++ = '\0';
|
|
|
|
if( strcmp( p, "type" ) == 0 )
|
|
{
|
|
if( strcmp( q, "rsa" ) == 0 )
|
|
opt.type = POLARSSL_PK_RSA;
|
|
else if( strcmp( q, "ec" ) == 0 )
|
|
opt.type = POLARSSL_PK_ECKEY;
|
|
else
|
|
goto usage;
|
|
}
|
|
else if( strcmp( p, "format" ) == 0 )
|
|
{
|
|
if( strcmp( q, "pem" ) == 0 )
|
|
opt.format = FORMAT_PEM;
|
|
else if( strcmp( q, "der" ) == 0 )
|
|
opt.format = FORMAT_DER;
|
|
else
|
|
goto usage;
|
|
}
|
|
else if( strcmp( p, "rsa_keysize" ) == 0 )
|
|
{
|
|
opt.rsa_keysize = atoi( q );
|
|
if( opt.rsa_keysize < 1024 ||
|
|
opt.rsa_keysize > POLARSSL_MPI_MAX_BITS )
|
|
goto usage;
|
|
}
|
|
else if( strcmp( p, "ec_curve" ) == 0 )
|
|
{
|
|
if( ( curve_info = ecp_curve_info_from_name( q ) ) == NULL )
|
|
goto usage;
|
|
opt.ec_curve = curve_info->grp_id;
|
|
}
|
|
else if( strcmp( p, "filename" ) == 0 )
|
|
opt.filename = q;
|
|
else if( strcmp( p, "use_dev_random" ) == 0 )
|
|
{
|
|
opt.use_dev_random = atoi( q );
|
|
if( opt.use_dev_random < 0 || opt.use_dev_random > 1 )
|
|
goto usage;
|
|
}
|
|
else
|
|
goto usage;
|
|
}
|
|
|
|
printf( "\n . Seeding the random number generator..." );
|
|
fflush( stdout );
|
|
|
|
entropy_init( &entropy );
|
|
#if !defined(_WIN32) && defined(POLARSSL_FS_IO)
|
|
if( opt.use_dev_random )
|
|
{
|
|
if( ( ret = entropy_add_source( &entropy, dev_random_entropy_poll,
|
|
NULL, DEV_RANDOM_THRESHOLD ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! entropy_add_source returned -0x%04x\n", -ret );
|
|
goto exit;
|
|
}
|
|
|
|
printf("\n Using /dev/random, so can take a long time! " );
|
|
fflush( stdout );
|
|
}
|
|
#endif /* !_WIN32 && POLARSSL_FS_IO */
|
|
|
|
if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
|
|
(const unsigned char *) pers,
|
|
strlen( pers ) ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! ctr_drbg_init returned -0x%04x\n", -ret );
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* 1.1. Generate the key
|
|
*/
|
|
printf( "\n . Generating the private key ..." );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = pk_init_ctx( &key, pk_info_from_type( opt.type ) ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! pk_init_ctx returned -0x%04x", -ret );
|
|
goto exit;
|
|
}
|
|
|
|
#if defined(POLARSSL_RSA_C) && defined(POLARSSL_GENPRIME)
|
|
if( opt.type == POLARSSL_PK_RSA )
|
|
{
|
|
ret = rsa_gen_key( pk_rsa( key ), ctr_drbg_random, &ctr_drbg,
|
|
opt.rsa_keysize, 65537 );
|
|
if( ret != 0 )
|
|
{
|
|
printf( " failed\n ! rsa_gen_key returned -0x%04x", -ret );
|
|
goto exit;
|
|
}
|
|
}
|
|
else
|
|
#endif /* POLARSSL_RSA_C */
|
|
#if defined(POLARSSL_ECP_C)
|
|
if( opt.type == POLARSSL_PK_ECKEY )
|
|
{
|
|
ret = ecp_gen_key( opt.ec_curve, pk_ec( key ),
|
|
ctr_drbg_random, &ctr_drbg );
|
|
if( ret != 0 )
|
|
{
|
|
printf( " failed\n ! rsa_gen_key returned -0x%04x", -ret );
|
|
goto exit;
|
|
}
|
|
}
|
|
else
|
|
#endif /* POLARSSL_ECP_C */
|
|
{
|
|
printf( " failed\n ! key type not supported\n" );
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* 1.2 Print the key
|
|
*/
|
|
printf( " ok\n . Key information:\n" );
|
|
|
|
#if defined(POLARSSL_RSA_C)
|
|
if( pk_get_type( &key ) == POLARSSL_PK_RSA )
|
|
{
|
|
rsa_context *rsa = pk_rsa( key );
|
|
mpi_write_file( "N: ", &rsa->N, 16, NULL );
|
|
mpi_write_file( "E: ", &rsa->E, 16, NULL );
|
|
mpi_write_file( "D: ", &rsa->D, 16, NULL );
|
|
mpi_write_file( "P: ", &rsa->P, 16, NULL );
|
|
mpi_write_file( "Q: ", &rsa->Q, 16, NULL );
|
|
mpi_write_file( "DP: ", &rsa->DP, 16, NULL );
|
|
mpi_write_file( "DQ: ", &rsa->DQ, 16, NULL );
|
|
mpi_write_file( "QP: ", &rsa->QP, 16, NULL );
|
|
}
|
|
else
|
|
#endif
|
|
#if defined(POLARSSL_ECP_C)
|
|
if( pk_get_type( &key ) == POLARSSL_PK_ECKEY )
|
|
{
|
|
ecp_keypair *ecp = pk_ec( key );
|
|
printf( "curve: %s\n",
|
|
ecp_curve_info_from_grp_id( ecp->grp.id )->name );
|
|
mpi_write_file( "X_Q: ", &ecp->Q.X, 16, NULL );
|
|
mpi_write_file( "Y_Q: ", &ecp->Q.Y, 16, NULL );
|
|
mpi_write_file( "D: ", &ecp->d , 16, NULL );
|
|
}
|
|
else
|
|
#endif
|
|
printf(" ! key type not supported\n");
|
|
|
|
/*
|
|
* 1.3 Export key
|
|
*/
|
|
printf( " . Writing key to file..." );
|
|
|
|
if( ( ret = write_private_key( &key, opt.filename ) ) != 0 )
|
|
{
|
|
printf( " failed\n" );
|
|
goto exit;
|
|
}
|
|
|
|
printf( " ok\n" );
|
|
|
|
exit:
|
|
|
|
if( ret != 0 && ret != 1)
|
|
{
|
|
#ifdef POLARSSL_ERROR_C
|
|
polarssl_strerror( ret, buf, sizeof( buf ) );
|
|
printf( " - %s\n", buf );
|
|
#else
|
|
printf("\n");
|
|
#endif
|
|
}
|
|
|
|
pk_free( &key );
|
|
ctr_drbg_free( &ctr_drbg );
|
|
entropy_free( &entropy );
|
|
|
|
#if defined(_WIN32)
|
|
printf( " + Press Enter to exit this program.\n" );
|
|
fflush( stdout ); getchar();
|
|
#endif
|
|
|
|
return( ret );
|
|
}
|
|
#endif /* POLARSSL_PK_WRITE_C && POLARSSL_FS_IO */
|