Key generation tool

programs/.gitignore

@@ -10,6 +10,7 @@ pkey/dh_client
 pkey/dh_genprime
 pkey/dh_server
 pkey/ecdsa
+pkey/gen_key
 pkey/key_app
 pkey/key_app_writer
 pkey/mpi_demo

programs/Makefile

@@ -25,6 +25,7 @@ APPS =	aes/aescrypt2	aes/crypt_and_hash	\
 	hash/md5sum			hash/sha1sum		\
 	hash/sha2sum		pkey/dh_client		\
 	pkey/dh_genprime	pkey/dh_server		\
+	pkey/gen_key							\
 	pkey/key_app		pkey/key_app_writer	\
 	pkey/mpi_demo		pkey/pk_decrypt		\
 	pkey/pk_encrypt		pkey/pk_sign		\
@@ -96,6 +97,10 @@ pkey/ecdsa: pkey/ecdsa.c ../library/libpolarssl.a
 	echo   "  CC    pkey/ecdsa.c"
 	$(CC) $(CFLAGS) $(OFLAGS) pkey/ecdsa.c       $(LDFLAGS) -o $@
 
+pkey/gen_key: pkey/gen_key.c ../library/libpolarssl.a
+	echo   "  CC    pkey/gen_key.c"
+	$(CC) $(CFLAGS) $(OFLAGS) pkey/gen_key.c   $(LDFLAGS) -o $@
+
 pkey/key_app: pkey/key_app.c ../library/libpolarssl.a
 	echo   "  CC    pkey/key_app.c"
 	$(CC) $(CFLAGS) $(OFLAGS) pkey/key_app.c   $(LDFLAGS) -o $@

programs/pkey/CMakeLists.txt

@@ -10,6 +10,9 @@ target_link_libraries(dh_server polarssl)
 add_executable(ecdsa ecdsa.c)
 target_link_libraries(ecdsa polarssl)
 
+add_executable(gen_key gen_key.c)
+target_link_libraries(gen_key polarssl)
+
 add_executable(key_app key_app.c)
 target_link_libraries(key_app polarssl)
 
@@ -52,6 +55,6 @@ target_link_libraries(pk_encrypt polarssl)
 add_executable(pk_decrypt pk_decrypt.c)
 target_link_libraries(pk_decrypt polarssl)
 
-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
+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
         DESTINATION "bin"
         PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)

programs/pkey/gen_key.c

@@ -0,0 +1,280 @@
+/*
+ *  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.
+ */
+
+#include "polarssl/config.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#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 TYPE_RSA                0
+
+#define FORMAT_PEM              0
+#define FORMAT_DER              1
+
+#define DFL_TYPE                TYPE_RSA
+#define DFL_RSA_KEYSIZE         4096
+#define DFL_FILENAME            "keyfile.key"
+#define DFL_FORMAT              FORMAT_PEM
+
+/*
+ * global options
+ */
+struct options
+{
+    int type;                   /* the type of key to generate          */
+    int rsa_keysize;            /* length of key in bits                */
+    const char *filename;       /* filename of the key file             */
+    int format;                 /* the output format to use             */
+} opt;
+
+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 - 1;
+    }
+
+    if( ( f = fopen( output_file, "w" ) ) == NULL )
+        return( -1 );
+
+    if( fwrite( c, 1, len, f ) != len )
+        return( -1 );
+
+    fclose(f);
+
+    return( 0 );
+}
+
+#define USAGE \
+    "\n usage: gen_key param=<>...\n"                    \
+    "\n acceptable parameters:\n"                       \
+    "    type=rsa              default: rsa\n"          \
+    "    rsa_keysize=%%d      default: 4096\n"          \
+    "    filename=%%s         default: keyfile.key\n"   \
+    "    format=pem|der        default: pem\n"          \
+    "\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";
+
+    /*
+     * Set to sane values
+     */
+    pk_init( &key );
+    memset( buf, 0, sizeof( buf ) );
+
+    if( argc == 0 )
+    {
+    usage:
+        ret = 1;
+        printf( USAGE );
+        goto exit;
+    }
+
+    opt.type                = DFL_TYPE;
+    opt.rsa_keysize         = DFL_RSA_KEYSIZE;
+    opt.filename            = DFL_FILENAME;
+    opt.format              = DFL_FORMAT;
+
+    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 = TYPE_RSA;
+            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 > 8192 )
+                goto usage;
+        }
+        else if( strcmp( p, "filename" ) == 0 )
+            opt.filename = q;
+        else
+            goto usage;
+    }
+
+    printf( "\n  . Seeding the random number generator..." );
+    fflush( stdout );
+
+    entropy_init( &entropy );
+    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 defined(POLARSSL_RSA_C) && defined(POLARSSL_GENPRIME)
+    if( opt.type == TYPE_RSA )
+    {
+        pk_init_ctx( &key, pk_info_from_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;
+        }
+
+        printf( " ok\n" );
+    }
+    else
+#endif /* POLARSSL_RSA_C */
+    {
+        printf( " failed\n  !  key type not supported in library" );
+        goto exit;
+    }
+
+    /*
+     * 1.2 Print the key
+     */
+    printf( "  . 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 );
+        mpi_write_file( "Q(X): ", &ecp->Q.X, 16, NULL );
+        mpi_write_file( "Q(Y): ", &ecp->Q.Y, 16, NULL );
+        mpi_write_file( "Q(Z): ", &ecp->Q.Z, 16, NULL );
+        mpi_write_file( "D   : ", &ecp->d  , 16, NULL );
+    }
+    else
+#endif
+        printf("key type not supported yet\n");
+
+    write_private_key( &key, opt.filename );
+
+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 );
+
+#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 */