Fix error handling in RAND_DRBG_set
[openssl.git] / apps / dhparam.c
index 709547f..13f7675 100644 (file)
-/* apps/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.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
- *
- * 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 above 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 acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED 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 OpenSSL PROJECT OR
- * ITS 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.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
  */
 
-#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>
-
-#ifndef NO_DSA
-#include <openssl/dsa.h>
+#include <openssl/opensslconf.h>
+#ifdef OPENSSL_NO_DH
+NON_EMPTY_TRANSLATION_UNIT
+#else
+
+# include <stdio.h>
+# include <stdlib.h>
+# include <time.h>
+# include <string.h>
+# include "apps.h"
+# include "progs.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>
+
+# ifndef OPENSSL_NO_DSA
+#  include <openssl/dsa.h>
+# endif
+
+# define DEFBITS 2048
+
+static int dh_cb(int p, int n, BN_GENCB *cb);
+
+typedef enum OPTION_choice {
+    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
+    OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
+    OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
+    OPT_DSAPARAM, OPT_C, OPT_2, OPT_5,
+    OPT_R_ENUM
+} OPTION_CHOICE;
+
+const OPTIONS dhparam_options[] = {
+    {OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"},
+    {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
+    {"help", OPT_HELP, '-', "Display this summary"},
+    {"in", OPT_IN, '<', "Input file"},
+    {"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
+    {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
+    {"out", OPT_OUT, '>', "Output file"},
+    {"check", OPT_CHECK, '-', "Check the DH parameters"},
+    {"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
+    {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
+    OPT_R_OPTIONS,
+    {"C", OPT_C, '-', "Print C code"},
+    {"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
+    {"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
+# ifndef OPENSSL_NO_DSA
+    {"dsaparam", OPT_DSAPARAM, '-',
+     "Read or generate DSA parameters, convert to DH"},
+# endif
+# ifndef OPENSSL_NO_ENGINE
+    {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
+# endif
+    {NULL}
+};
+
+int dhparam_main(int argc, char **argv)
+{
+    BIO *in = NULL, *out = NULL;
+    DH *dh = NULL;
+    char *infile = NULL, *outfile = NULL, *prog;
+    ENGINE *e = NULL;
+#ifndef OPENSSL_NO_DSA
+    int dsaparam = 0;
 #endif
-
-#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
- * -dsaparam  - read or generate DSA parameters, convert to DH
- * -check      - check the parameters are ok
- * -noout
- * -text
- * -C
- */
-
-static void MS_CALLBACK dh_cb(int p, int n, void *arg);
-
-int MAIN(int, char **);
-
-int MAIN(int argc, char **argv)
-       {
-       DH *dh=NULL;
-       int i,badops=0,text=0;
-#ifndef NO_DSA
-       int dsaparam=0;
-#endif
-       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;
-#ifndef NO_DSA
-               else if (strcmp(*argv,"-dsaparam") == 0)
-                       dsaparam=1;
+    int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
+    int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
+    OPTION_CHOICE o;
+
+    prog = opt_init(argc, argv, dhparam_options);
+    while ((o = opt_next()) != OPT_EOF) {
+        switch (o) {
+        case OPT_EOF:
+        case OPT_ERR:
+ opthelp:
+            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
+            goto end;
+        case OPT_HELP:
+            opt_help(dhparam_options);
+            ret = 0;
+            goto end;
+        case OPT_INFORM:
+            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
+                goto opthelp;
+            break;
+        case OPT_OUTFORM:
+            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
+                goto opthelp;
+            break;
+        case OPT_IN:
+            infile = opt_arg();
+            break;
+        case OPT_OUT:
+            outfile = opt_arg();
+            break;
+        case OPT_ENGINE:
+            e = setup_engine(opt_arg(), 0);
+            break;
+        case OPT_CHECK:
+            check = 1;
+            break;
+        case OPT_TEXT:
+            text = 1;
+            break;
+        case OPT_DSAPARAM:
+#ifndef OPENSSL_NO_DSA
+            dsaparam = 1;
 #endif
-               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");
-#ifndef NO_DSA
-               BIO_printf(bio_err," -dsaparam     read or generate DSA parameters, convert to DH\n");
-#endif
-               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%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
-               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;
-
-#ifndef NO_DSA
-       if (dsaparam)
-               {
-               if (g)
-                       {
-                       BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n");
-                       goto end;
-                       }
-               }
-       else
-#endif
-               {
-               /* DH parameters */
-               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));
-
-#ifndef NO_DSA
-               if (dsaparam)
-                       {
-                       DSA *dsa;
-                       
-                       BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
-               dsa = DSA_generate_parameters(num, NULL, 0, NULL, NULL, dh_cb, bio_err);
-                       if (dsa == NULL)
-                               {
-                               ERR_print_errors(bio_err);
-                               goto end;
-                               }
-
-                       dh = DSA_dup_DH(dsa);
-                       DSA_free(dsa);
-                       if (dh == NULL)
-                               {
-                               ERR_print_errors(bio_err);
-                               goto end;
-                               }
-                       }
-               else
-#endif
-                       {
-                       BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %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)
-                               {
-                               ERR_print_errors(bio_err);
-                               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 && informat != FORMAT_PEM)
-                       {
-                       BIO_printf(bio_err,"bad input format specified\n");
-                       goto end;
-                       }
-
-#ifndef NO_DSA
-               if (dsaparam)
-                       {
-                       DSA *dsa;
-                       
-                       if (informat == FORMAT_ASN1)
-                               dsa=d2i_DSAparams_bio(in,NULL);
-                       else /* informat == FORMAT_PEM */
-                               dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
-                       
-                       if (dsa == NULL)
-                               {
-                               BIO_printf(bio_err,"unable to load DSA parameters\n");
-                               ERR_print_errors(bio_err);
-                               goto end;
-                               }
-                       
-                       dh = DSA_dup_DH(dsa);
-                       DSA_free(dsa);
-                       if (dh == NULL)
-                               {
-                               ERR_print_errors(bio_err);
-                               goto end;
-                               }
-                       }
-               else
-#endif
-                       {
-                       if (informat == FORMAT_ASN1)
-                               dh=d2i_DHparams_bio(in,NULL);
-                       else /* informat == FORMAT_PEM */
-                               dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
-                       
-                       if (dh == NULL)
-                               {
-                               BIO_printf(bio_err,"unable to load DH parameters\n");
-                               ERR_print_errors(bio_err);
-                               goto end;
-                               }
-                       }
-               
-               /* dh != NULL */
-       }
-       
-       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_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 *)Malloc(len);
-               if (data == NULL)
-                       {
-                       perror("Malloc");
-                       goto end;
-                       }
-               printf("#ifndef HEADER_DH_H\n"
-                      "#include <openssl/dh.h>\n"
-                      "#endif\n");
-               printf("DH *get_dh%d()\n\t{\n",bits);
-
-               l=BN_bn2bin(dh->p,data);
-               printf("\tstatic unsigned char dh%d_p[]={",bits);
-               for (i=0; i<l; i++)
-                       {
-                       if ((i%12) == 0) printf("\n\t\t");
-                       printf("0x%02X,",data[i]);
-                       }
-               printf("\n\t\t};\n");
-
-               l=BN_bn2bin(dh->g,data);
-               printf("\tstatic unsigned char dh%d_g[]={",bits);
-               for (i=0; i<l; i++)
-                       {
-                       if ((i%12) == 0) printf("\n\t\t");
-                       printf("0x%02X,",data[i]);
-                       }
-               printf("\n\t\t};\n");
-
-               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\t{ DH_free(dh); return(NULL); }\n");
-               if (dh->length)
-                       printf("\tdh->length = %d;\n", dh->length);
-               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 parameters\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);
-       }
-
-/* dh_cb is identical to dsa_cb in apps/dsaparam.c */
-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
-       }
-
+            break;
+        case OPT_C:
+            C = 1;
+            break;
+        case OPT_2:
+            g = 2;
+            break;
+        case OPT_5:
+            g = 5;
+            break;
+        case OPT_NOOUT:
+            noout = 1;
+            break;
+        case OPT_R_CASES:
+            if (!opt_rand(o))
+                goto end;
+            break;
+        }
+    }
+    argc = opt_num_rest();
+    argv = opt_rest();
+
+    if (argv[0] != NULL && (!opt_int(argv[0], &num) || num <= 0))
+        goto end;
+
+    if (g && !num)
+        num = DEFBITS;
+
+# ifndef OPENSSL_NO_DSA
+    if (dsaparam && g) {
+        BIO_printf(bio_err,
+                   "generator may not be chosen for DSA parameters\n");
+        goto end;
+    }
+# endif
+
+    out = bio_open_default(outfile, 'w', outformat);
+    if (out == NULL)
+        goto end;
+
+    /* DH parameters */
+    if (num && !g)
+        g = 2;
+
+    if (num) {
+
+        BN_GENCB *cb;
+        cb = BN_GENCB_new();
+        if (cb == NULL) {
+            ERR_print_errors(bio_err);
+            goto end;
+        }
+
+        BN_GENCB_set(cb, dh_cb, bio_err);
+
+# ifndef OPENSSL_NO_DSA
+        if (dsaparam) {
+            DSA *dsa = DSA_new();
+
+            BIO_printf(bio_err,
+                       "Generating DSA parameters, %d bit long prime\n", num);
+            if (dsa == NULL
+                || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
+                                               cb)) {
+                DSA_free(dsa);
+                BN_GENCB_free(cb);
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+
+            dh = DSA_dup_DH(dsa);
+            DSA_free(dsa);
+            if (dh == NULL) {
+                BN_GENCB_free(cb);
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+        } else
+# endif
+        {
+            dh = DH_new();
+            BIO_printf(bio_err,
+                       "Generating DH parameters, %d bit long safe prime, generator %d\n",
+                       num, g);
+            BIO_printf(bio_err, "This is going to take a long time\n");
+            if (dh == NULL || !DH_generate_parameters_ex(dh, num, g, cb)) {
+                BN_GENCB_free(cb);
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+        }
+
+        BN_GENCB_free(cb);
+    } else {
+
+        in = bio_open_default(infile, 'r', informat);
+        if (in == NULL)
+            goto end;
+
+# ifndef OPENSSL_NO_DSA
+        if (dsaparam) {
+            DSA *dsa;
+
+            if (informat == FORMAT_ASN1)
+                dsa = d2i_DSAparams_bio(in, NULL);
+            else                /* informat == FORMAT_PEM */
+                dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
+
+            if (dsa == NULL) {
+                BIO_printf(bio_err, "unable to load DSA parameters\n");
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+
+            dh = DSA_dup_DH(dsa);
+            DSA_free(dsa);
+            if (dh == NULL) {
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+        } else
+# endif
+        {
+            if (informat == FORMAT_ASN1) {
+                /*
+                 * We have no PEM header to determine what type of DH params it
+                 * is. We'll just try both.
+                 */
+                dh = d2i_DHparams_bio(in, NULL);
+                /* BIO_reset() returns 0 for success for file BIOs only!!! */
+                if (dh == NULL && BIO_reset(in) == 0)
+                    dh = d2i_DHxparams_bio(in, NULL);
+            } else {
+                /* informat == FORMAT_PEM */
+                dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
+            }
+
+            if (dh == NULL) {
+                BIO_printf(bio_err, "unable to load DH parameters\n");
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+        }
+
+        /* dh != NULL */
+    }
+
+    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)
+            BIO_printf(bio_err, "WARNING: p value is not prime\n");
+        if (i & DH_CHECK_P_NOT_SAFE_PRIME)
+            BIO_printf(bio_err, "WARNING: p value is not a safe prime\n");
+        if (i & DH_CHECK_Q_NOT_PRIME)
+            BIO_printf(bio_err, "WARNING: q value is not a prime\n");
+        if (i & DH_CHECK_INVALID_Q_VALUE)
+            BIO_printf(bio_err, "WARNING: q value is invalid\n");
+        if (i & DH_CHECK_INVALID_J_VALUE)
+            BIO_printf(bio_err, "WARNING: j value is invalid\n");
+        if (i & DH_UNABLE_TO_CHECK_GENERATOR)
+            BIO_printf(bio_err,
+                       "WARNING: unable to check the generator value\n");
+        if (i & DH_NOT_SUITABLE_GENERATOR)
+            BIO_printf(bio_err, "WARNING: the g value is not a generator\n");
+        if (i == 0)
+            BIO_printf(bio_err, "DH parameters appear to be ok.\n");
+        if (num != 0 && i != 0) {
+            /*
+             * We have generated parameters but DH_check() indicates they are
+             * invalid! This should never happen!
+             */
+            BIO_printf(bio_err, "ERROR: Invalid parameters generated\n");
+            goto end;
+        }
+    }
+    if (C) {
+        unsigned char *data;
+        int len, bits;
+        const BIGNUM *pbn, *gbn;
+
+        len = DH_size(dh);
+        bits = DH_bits(dh);
+        DH_get0_pqg(dh, &pbn, NULL, &gbn);
+        data = app_malloc(len, "print a BN");
+
+        BIO_printf(out, "static DH *get_dh%d(void)\n{\n", bits);
+        print_bignum_var(out, pbn, "dhp", bits, data);
+        print_bignum_var(out, gbn, "dhg", bits, data);
+        BIO_printf(out, "    DH *dh = DH_new();\n"
+                        "    BIGNUM *p, *g;\n"
+                        "\n"
+                        "    if (dh == NULL)\n"
+                        "        return NULL;\n");
+        BIO_printf(out, "    p = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
+                   bits, bits);
+        BIO_printf(out, "    g = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
+                   bits, bits);
+        BIO_printf(out, "    if (p == NULL || g == NULL\n"
+                        "            || !DH_set0_pqg(dh, p, NULL, g)) {\n"
+                        "        DH_free(dh);\n"
+                        "        BN_free(p);\n"
+                        "        BN_free(g);\n"
+                        "        return NULL;\n"
+                        "    }\n");
+        if (DH_get_length(dh) > 0)
+            BIO_printf(out,
+                        "    if (!DH_set_length(dh, %ld)) {\n"
+                        "        DH_free(dh);\n"
+                        "        return NULL;\n"
+                        "    }\n", DH_get_length(dh));
+        BIO_printf(out, "    return dh;\n}\n");
+        OPENSSL_free(data);
+    }
+
+    if (!noout) {
+        const BIGNUM *q;
+        DH_get0_pqg(dh, NULL, &q, NULL);
+        if (outformat == FORMAT_ASN1) {
+            if (q != NULL)
+                i = i2d_DHxparams_bio(out, dh);
+            else
+                i = i2d_DHparams_bio(out, dh);
+        } else if (q != NULL) {
+            i = PEM_write_bio_DHxparams(out, dh);
+        } else {
+            i = PEM_write_bio_DHparams(out, dh);
+        }
+        if (!i) {
+            BIO_printf(bio_err, "unable to write DH parameters\n");
+            ERR_print_errors(bio_err);
+            goto end;
+        }
+    }
+    ret = 0;
+ end:
+    BIO_free(in);
+    BIO_free_all(out);
+    DH_free(dh);
+    release_engine(e);
+    return ret;
+}
+
+static int dh_cb(int p, int n, BN_GENCB *cb)
+{
+    static const char symbols[] = ".+*\n";
+    char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
+
+    BIO_write(BN_GENCB_get_arg(cb), &c, 1);
+    (void)BIO_flush(BN_GENCB_get_arg(cb));
+    return 1;
+}
 #endif