Add new program dhparam and update docs.

1 files changed, 366 insertions, 0 deletions

diff --git a/apps/dhparam.c b/apps/dhparam.c
new file mode 100644
index 0000000000..a7b4213764
--- /dev/null
+++ b/apps/dhparam.c
@@ -0,0 +1,366 @@
+/* apps/dh.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.]
+ */
+
+#ifndef 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	dhparam_main
+
+#define DEFBITS	512
+
+/* -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
+ */
+
+static void MS_CALLBACK dh_cb(int p, int n, void *arg);
+
+int MAIN(int argc, char **argv)
+	{
+	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;
+	char *inrand=NULL;
+	int num = 0, g = 0;
+
+	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);
+
+	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);
+			}
+		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 if (strcmp(*argv,"-2") == 0)
+			g=2;
+		else if (strcmp(*argv,"-5") == 0)
+			g=5;
+		else if (strcmp(*argv,"-rand") == 0)
+			{
+			if (--argc < 1) goto bad;
+			inrand= *(++argv);
+			}
+		else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0)))
+			goto bad;
+		argv++;
+		argc--;
+		}
+
+	if (badops)
+		{
+bad:
+		BIO_printf(bio_err,"%s [options] [numbits]\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," -2            generate parameters using  2 as the generator value\n");
+		BIO_printf(bio_err," -5            generate parameters using  5 as the generator value\n");
+		BIO_printf(bio_err," numbits       number of bits in to generate (default 512)\n");
+		BIO_printf(bio_err," -rand file:file:...\n");
+		BIO_printf(bio_err,"               - load the file (or the files in the directory) into\n");
+		BIO_printf(bio_err,"               the random number generator\n");
+		BIO_printf(bio_err," -noout        no output\n");
+		goto end;
+		}
+
+	ERR_load_crypto_strings();
+
+	if(g && !num) num = DEFBITS;
+	else if(num && !g) g = 2;
+
+	if(num) {
+
+		if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
+			{
+			BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
+			}
+		if (inrand != NULL)
+			BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
+				app_RAND_load_files(inrand));
+
+		BIO_printf(bio_err,"Generating DH parameters, %d bit long strong prime, generator of %d\n",num,g);
+		BIO_printf(bio_err,"This is going to take a long time\n");
+		dh=DH_generate_parameters(num,g,dh_cb,bio_err);
+			
+		if (dh == NULL) goto end;
+
+		app_RAND_write_file(NULL, bio_err);
+	} else {
+
+		in=BIO_new(BIO_s_file());
+		if (in == 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	(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;
+			}
+
+	}
+
+	out=BIO_new(BIO_s_file());
+	if (out == NULL)
+		{
+		ERR_print_errors(bio_err);
+		goto end;
+		}
+	if (outfile == NULL)
+		BIO_set_fp(out,stdout,BIO_NOCLOSE);
+	else
+		{
+		if (BIO_write_filename(out,outfile) <= 0)
+			{
+			perror(outfile);
+			goto end;
+			}
+		}
+
+	
+
+	if (text)
+		{
+		DHparams_print(out,dh);
+		}
+	
+	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_STRONG_PRIME)
+			printf("p value is not a strong 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 *)Malloc(len);
+		if (data == NULL)
+			{
+			perror("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");
+		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 paramaters\n");
+			ERR_print_errors(bio_err);
+			goto end;
+			}
+		}
+	ret=0;
+end:
+	if (in != NULL) BIO_free(in);
+	if (out != NULL) BIO_free(out);
+	if (dh != NULL) DH_free(dh);
+	EXIT(ret);
+	}
+
+static void MS_CALLBACK dh_cb(int p, int n, void *arg)
+	{
+	char c='*';
+
+	if (p == 0) c='.';
+	if (p == 1) c='+';
+	if (p == 2) c='*';
+	if (p == 3) c='\n';
+	BIO_write((BIO *)arg,&c,1);
+	(void)BIO_flush((BIO *)arg);
+#ifdef LINT
+	p=n;
+#endif
+	}
+
+#endif