/* apps/dh.c */ /* obsoleted by dhparam.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */ #ifndef OPENSSL_NO_DH #include <stdio.h> #include <stdlib.h> #include <time.h> #include <string.h> #include "apps.h" #include <openssl/bio.h> #include <openssl/err.h> #include <openssl/bn.h> #include <openssl/dh.h> #include <openssl/x509.h> #include <openssl/pem.h> #undef PROG #define PROG dh_main /* -inform arg - input format - default PEM (DER or PEM) * -outform arg - output format - default PEM * -in arg - input file - default stdin * -out arg - output file - default stdout * -check - check the parameters are ok * -noout * -text * -C */ int MAIN(int, char **); int MAIN(int argc, char **argv) { #ifndef OPENSSL_NO_ENGINE ENGINE *e = NULL; #endif DH *dh=NULL; int i,badops=0,text=0; BIO *in=NULL,*out=NULL; int informat,outformat,check=0,noout=0,C=0,ret=1; char *infile,*outfile,*prog; #ifndef OPENSSL_NO_ENGINE char *engine; #endif apps_startup(); if (bio_err == NULL) if ((bio_err=BIO_new(BIO_s_file())) != NULL) BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); if (!load_config(bio_err, NULL)) goto end; #ifndef OPENSSL_NO_ENGINE engine=NULL; #endif infile=NULL; outfile=NULL; informat=FORMAT_PEM; outformat=FORMAT_PEM; prog=argv[0]; argc--; argv++; while (argc >= 1) { if (strcmp(*argv,"-inform") == 0) { if (--argc < 1) goto bad; informat=str2fmt(*(++argv)); } else if (strcmp(*argv,"-outform") == 0) { if (--argc < 1) goto bad; outformat=str2fmt(*(++argv)); } else if (strcmp(*argv,"-in") == 0) { if (--argc < 1) goto bad; infile= *(++argv); } else if (strcmp(*argv,"-out") == 0) { if (--argc < 1) goto bad; outfile= *(++argv); } #ifndef OPENSSL_NO_ENGINE else if (strcmp(*argv,"-engine") == 0) { if (--argc < 1) goto bad; engine= *(++argv); } #endif else if (strcmp(*argv,"-check") == 0) check=1; else if (strcmp(*argv,"-text") == 0) text=1; else if (strcmp(*argv,"-C") == 0) C=1; else if (strcmp(*argv,"-noout") == 0) noout=1; else { BIO_printf(bio_err,"unknown option %s\n",*argv); badops=1; break; } argc--; argv++; } if (badops) { bad: BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog); BIO_printf(bio_err,"where options are\n"); BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); BIO_printf(bio_err," -outform arg output format - one of DER PEM\n"); BIO_printf(bio_err," -in arg input file\n"); BIO_printf(bio_err," -out arg output file\n"); BIO_printf(bio_err," -check check the DH parameters\n"); BIO_printf(bio_err," -text print a text form of the DH parameters\n"); BIO_printf(bio_err," -C Output C code\n"); BIO_printf(bio_err," -noout no output\n"); #ifndef OPENSSL_NO_ENGINE BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); #endif goto end; } ERR_load_crypto_strings(); #ifndef OPENSSL_NO_ENGINE e = setup_engine(bio_err, engine, 0); #endif in=BIO_new(BIO_s_file()); out=BIO_new(BIO_s_file()); if ((in == NULL) || (out == NULL)) { ERR_print_errors(bio_err); goto end; } if (infile == NULL) BIO_set_fp(in,stdin,BIO_NOCLOSE); else { if (BIO_read_filename(in,infile) <= 0) { perror(infile); goto end; } } if (outfile == NULL) { BIO_set_fp(out,stdout,BIO_NOCLOSE); #ifdef OPENSSL_SYS_VMS { BIO *tmpbio = BIO_new(BIO_f_linebuffer()); out = BIO_push(tmpbio, out); } #endif } else { if (BIO_write_filename(out,outfile) <= 0) { perror(outfile); goto end; } } if (informat == FORMAT_ASN1) dh=d2i_DHparams_bio(in,NULL); else if (informat == FORMAT_PEM) dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); else { BIO_printf(bio_err,"bad input format specified\n"); goto end; } if (dh == NULL) { BIO_printf(bio_err,"unable to load DH parameters\n"); ERR_print_errors(bio_err); goto end; } if (text) { DHparams_print(out,dh); #ifdef undef printf("p="); BN_print(stdout,dh->p); printf("\ng="); BN_print(stdout,dh->g); printf("\n"); if (dh->length != 0) printf("recommended private length=%ld\n",dh->length); #endif } if (check) { if (!DH_check(dh,&i)) { ERR_print_errors(bio_err); goto end; } if (i & DH_CHECK_P_NOT_PRIME) printf("p value is not prime\n"); if (i & DH_CHECK_P_NOT_SAFE_PRIME) printf("p value is not a safe prime\n"); if (i & DH_UNABLE_TO_CHECK_GENERATOR) printf("unable to check the generator value\n"); if (i & DH_NOT_SUITABLE_GENERATOR) printf("the g value is not a generator\n"); if (i == 0) printf("DH parameters appear to be ok.\n"); } if (C) { unsigned char *data; int len,l,bits; len=BN_num_bytes(dh->p); bits=BN_num_bits(dh->p); data=(unsigned char *)OPENSSL_malloc(len); if (data == NULL) { perror("OPENSSL_malloc"); goto end; } l=BN_bn2bin(dh->p,data); printf("static unsigned char dh%d_p[]={",bits); for (i=0; i<l; i++) { if ((i%12) == 0) printf("\n\t"); printf("0x%02X,",data[i]); } printf("\n\t};\n"); l=BN_bn2bin(dh->g,data); printf("static unsigned char dh%d_g[]={",bits); for (i=0; i<l; i++) { if ((i%12) == 0) printf("\n\t"); printf("0x%02X,",data[i]); } printf("\n\t};\n\n"); printf("DH *get_dh%d()\n\t{\n",bits); printf("\tDH *dh;\n\n"); printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", bits,bits); printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", bits,bits); printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); printf("\t\treturn(NULL);\n"); printf("\treturn(dh);\n\t}\n"); OPENSSL_free(data); } if (!noout) { if (outformat == FORMAT_ASN1) i=i2d_DHparams_bio(out,dh); else if (outformat == FORMAT_PEM) i=PEM_write_bio_DHparams(out,dh); else { BIO_printf(bio_err,"bad output format specified for outfile\n"); goto end; } if (!i) { BIO_printf(bio_err,"unable to write DH parameters\n"); ERR_print_errors(bio_err); goto end; } } ret=0; end: if (in != NULL) BIO_free(in); if (out != NULL) BIO_free_all(out); if (dh != NULL) DH_free(dh); apps_shutdown(); OPENSSL_EXIT(ret); } #endif