/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (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
*/
#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 <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);
+
+#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/dsa.h>
+#include <openssl/dh.h>
+#include <openssl/x509.h>
+#include <openssl/pem.h>
+#include <openssl/core_names.h>
+#include <openssl/core_dispatch.h>
+#include <openssl/param_build.h>
+#include <openssl/encoder.h>
+#include <openssl/decoder.h>
+
+#define DEFBITS 2048
+
+static EVP_PKEY *dsa_to_dh(EVP_PKEY *dh);
typedef enum OPTION_choice {
- OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
+ OPT_COMMON,
OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
- OPT_RAND, OPT_DSAPARAM, OPT_C, OPT_2, OPT_5
+ OPT_DSAPARAM, OPT_2, OPT_3, OPT_5,
+ OPT_R_ENUM, OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS dhparam_options[] = {
- {OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"},
- {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
+ {OPT_HELP_STR, 1, '-', "Usage: %s [options] [numbits]\n"},
+
+ OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
+ {"check", OPT_CHECK, '-', "Check the DH parameters"},
+#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_DEPRECATED_3_0)
+ {"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
+
+ OPT_SECTION("Input"),
{"in", OPT_IN, '<', "Input file"},
{"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
- {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
+
+ OPT_SECTION("Output"),
{"out", OPT_OUT, '>', "Output file"},
- {"check", OPT_CHECK, '-', "Check the DH parameters"},
+ {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
{"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
{"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
- {"rand", OPT_RAND, 's',
- "Load the file(s) into the random number generator"},
- {"C", OPT_C, '-', "Print C code"},
{"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
+ {"3", OPT_3, '-', "Generate parameters using 3 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
+
+ OPT_R_OPTIONS,
+ OPT_PROV_OPTIONS,
+
+ OPT_PARAMETERS(),
+ {"numbits", 0, 0, "Number of bits if generating parameters (optional)"},
{NULL}
};
int dhparam_main(int argc, char **argv)
{
BIO *in = NULL, *out = NULL;
- DH *dh = NULL;
- char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL;
+ EVP_PKEY *pkey = NULL, *tmppkey = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ char *infile = NULL, *outfile = NULL, *prog;
ENGINE *e = NULL;
-#ifndef OPENSSL_NO_DSA
int dsaparam = 0;
-#endif
- int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
+ int text = 0, ret = 1, num = 0, g = 0;
int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
OPTION_CHOICE o;
text = 1;
break;
case OPT_DSAPARAM:
-#ifndef OPENSSL_NO_DSA
dsaparam = 1;
-#endif
- break;
- case OPT_C:
- C = 1;
break;
case OPT_2:
g = 2;
break;
+ case OPT_3:
+ g = 3;
+ break;
case OPT_5:
g = 5;
break;
case OPT_NOOUT:
noout = 1;
break;
- case OPT_RAND:
- inrand = opt_arg();
+ case OPT_R_CASES:
+ if (!opt_rand(o))
+ goto end;
+ break;
+ case OPT_PROV_CASES:
+ if (!opt_provider(o))
+ goto end;
break;
}
}
+
+ /* One optional argument, bitsize to generate. */
argc = opt_num_rest();
argv = opt_rest();
-
- if (argv[0] && (!opt_int(argv[0], &num) || num <= 0))
+ if (argc == 1) {
+ if (!opt_int(argv[0], &num) || num <= 0)
+ goto opthelp;
+ } else if (!opt_check_rest_arg(NULL)) {
+ goto opthelp;
+ }
+ if (!app_RAND_load())
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");
+ "Error, 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) {
+ const char *alg = dsaparam ? "DSA" : "DH";
- BN_GENCB *cb;
- cb = BN_GENCB_new();
- if (cb == NULL) {
- ERR_print_errors(bio_err);
+ ctx = EVP_PKEY_CTX_new_from_name(NULL, alg, NULL);
+ if (ctx == NULL) {
+ BIO_printf(bio_err,
+ "Error, %s param generation context allocation failed\n",
+ alg);
goto end;
}
+ EVP_PKEY_CTX_set_cb(ctx, progress_cb);
+ EVP_PKEY_CTX_set_app_data(ctx, bio_err);
+ BIO_printf(bio_err,
+ "Generating %s parameters, %d bit long %sprime\n",
+ alg, num, dsaparam ? "" : "safe ");
- BN_GENCB_set(cb, dh_cb, bio_err);
- if (!app_RAND_load_file(NULL, 1) && inrand == NULL) {
+ if (EVP_PKEY_paramgen_init(ctx) <= 0) {
BIO_printf(bio_err,
- "warning, not much extra random data, consider using the -rand option\n");
+ "Error, unable to initialise %s parameters\n",
+ alg);
+ goto end;
}
- if (inrand != NULL)
- BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
- app_RAND_load_files(inrand));
-# 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);
+ if (!EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, num)) {
+ BIO_printf(bio_err, "Error, unable to set DSA prime length\n");
goto end;
}
-
- dh = DSA_dup_DH(dsa);
- DSA_free(dsa);
- if (dh == NULL) {
- BN_GENCB_free(cb);
- ERR_print_errors(bio_err);
+ } else {
+ if (!EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, num)) {
+ BIO_printf(bio_err, "Error, unable to set DH prime length\n");
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);
+ if (!EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, g)) {
+ BIO_printf(bio_err, "Error, unable to set generator\n");
goto end;
}
}
- BN_GENCB_free(cb);
- app_RAND_write_file(NULL);
+ tmppkey = app_paramgen(ctx, alg);
+ EVP_PKEY_CTX_free(ctx);
+ ctx = NULL;
+ if (dsaparam) {
+ pkey = dsa_to_dh(tmppkey);
+ if (pkey == NULL)
+ goto end;
+ EVP_PKEY_free(tmppkey);
+ } else {
+ pkey = tmppkey;
+ }
+ tmppkey = NULL;
} else {
+ OSSL_DECODER_CTX *decoderctx = NULL;
+ const char *keytype = "DH";
+ int done;
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;
+ do {
+ /*
+ * We assume we're done unless we explicitly want to retry and set
+ * this to 0 below.
+ */
+ done = 1;
+ /*
+ * We set NULL for the keytype to allow any key type. We don't know
+ * if we're going to get DH or DHX (or DSA in the event of dsaparam).
+ * We check that we got one of those key types afterwards.
+ */
+ decoderctx
+ = OSSL_DECODER_CTX_new_for_pkey(&tmppkey,
+ (informat == FORMAT_ASN1)
+ ? "DER" : "PEM",
+ NULL,
+ (informat == FORMAT_ASN1)
+ ? keytype : NULL,
+ OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS,
+ NULL, NULL);
+
+ if (decoderctx != NULL
+ && !OSSL_DECODER_from_bio(decoderctx, in)
+ && informat == FORMAT_ASN1
+ && strcmp(keytype, "DH") == 0) {
+ /*
+ * When reading DER we explicitly state the expected keytype
+ * because, unlike PEM, there is no header to declare what
+ * the contents of the DER file are. The decoders just try
+ * and guess. Unfortunately with DHX key types they may guess
+ * wrong and think we have a DSA keytype. Therefore we try
+ * both DH and DHX sequentially.
+ */
+ keytype = "DHX";
+ /*
+ * BIO_reset() returns 0 for success for file BIOs only!!!
+ * This won't work for stdin (and never has done)
+ */
+ if (BIO_reset(in) == 0)
+ done = 0;
}
+ OSSL_DECODER_CTX_free(decoderctx);
+ } while (!done);
+ if (tmppkey == NULL) {
+ BIO_printf(bio_err, "Error, unable to load parameters\n");
+ goto end;
+ }
- dh = DSA_dup_DH(dsa);
- DSA_free(dsa);
- if (dh == NULL) {
- ERR_print_errors(bio_err);
+ if (dsaparam) {
+ if (!EVP_PKEY_is_a(tmppkey, "DSA")) {
+ BIO_printf(bio_err, "Error, unable to load DSA parameters\n");
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);
+ pkey = dsa_to_dh(tmppkey);
+ if (pkey == NULL)
+ goto end;
+ } else {
+ if (!EVP_PKEY_is_a(tmppkey, "DH")
+ && !EVP_PKEY_is_a(tmppkey, "DHX")) {
+ BIO_printf(bio_err, "Error, unable to load DH parameters\n");
goto end;
}
+ pkey = tmppkey;
+ tmppkey = NULL;
}
-
- /* dh != NULL */
}
- out = bio_open_default(outfile, 'w', outformat);
- if (out == NULL)
- goto end;
-
- if (text) {
- DHparams_print(out, dh);
- }
+ if (text)
+ EVP_PKEY_print_params(out, pkey, 4, NULL);
if (check) {
- if (!DH_check(dh, &i)) {
- ERR_print_errors(bio_err);
+ ctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL);
+ if (ctx == NULL) {
+ BIO_printf(bio_err, "Error, failed to check DH parameters\n");
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");
+ if (!EVP_PKEY_param_check(ctx)) {
+ 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, "#ifndef HEADER_DH_H\n"
- "# include <openssl/dh.h>\n"
- "#endif\n"
- "\n");
- BIO_printf(out, "DH *get_dh%d()\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 *dhp_bn, *dhg_bn;\n"
- "\n"
- " if (dh == NULL)\n"
- " return NULL;\n");
- BIO_printf(out, " dhp_bn = BN_bin2bn(dhp_%d, sizeof (dhp_%d), NULL);\n",
- bits, bits);
- BIO_printf(out, " dhg_bn = BN_bin2bn(dhg_%d, sizeof (dhg_%d), NULL);\n",
- bits, bits);
- BIO_printf(out, " if (dhp_bn == NULL || dhg_bn == NULL\n"
- " || !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) {\n"
- " DH_free(dh);\n"
- " BN_free(dhp_bn);\n"
- " BN_free(dhg_bn);\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"
- " }\n", DH_get_length(dh));
- BIO_printf(out, " return dh;\n}\n");
- OPENSSL_free(data);
+ BIO_printf(bio_err, "DH parameters appear to be ok.\n");
}
if (!noout) {
- const BIGNUM *q;
- DH_get0_pqg(dh, NULL, &q, NULL);
- if (outformat == FORMAT_ASN1)
- 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);
+ OSSL_ENCODER_CTX *ectx =
+ OSSL_ENCODER_CTX_new_for_pkey(pkey,
+ OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS,
+ outformat == FORMAT_ASN1
+ ? "DER" : "PEM",
+ NULL, NULL);
+
+ if (ectx == NULL || !OSSL_ENCODER_to_bio(ectx, out)) {
+ OSSL_ENCODER_CTX_free(ectx);
+ BIO_printf(bio_err, "Error, unable to write DH parameters\n");
goto end;
}
+ OSSL_ENCODER_CTX_free(ectx);
}
ret = 0;
end:
+ if (ret != 0)
+ ERR_print_errors(bio_err);
BIO_free(in);
BIO_free_all(out);
- DH_free(dh);
+ EVP_PKEY_free(pkey);
+ EVP_PKEY_free(tmppkey);
+ EVP_PKEY_CTX_free(ctx);
release_engine(e);
- return (ret);
+ return ret;
}
-static int dh_cb(int p, int n, BN_GENCB *cb)
+/*
+ * Historically we had the low level call DSA_dup_DH() to do this.
+ * That is now deprecated with no replacement. Since we still need to do this
+ * for backwards compatibility reasons, we do it "manually".
+ */
+static EVP_PKEY *dsa_to_dh(EVP_PKEY *dh)
{
- char c = '*';
-
- if (p == 0)
- c = '.';
- if (p == 1)
- c = '+';
- if (p == 2)
- c = '*';
- if (p == 3)
- c = '\n';
- BIO_write(BN_GENCB_get_arg(cb), &c, 1);
- (void)BIO_flush(BN_GENCB_get_arg(cb));
- return 1;
+ OSSL_PARAM_BLD *tmpl = NULL;
+ OSSL_PARAM *params = NULL;
+ BIGNUM *bn_p = NULL, *bn_q = NULL, *bn_g = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ EVP_PKEY *pkey = NULL;
+
+ if (!EVP_PKEY_get_bn_param(dh, OSSL_PKEY_PARAM_FFC_P, &bn_p)
+ || !EVP_PKEY_get_bn_param(dh, OSSL_PKEY_PARAM_FFC_Q, &bn_q)
+ || !EVP_PKEY_get_bn_param(dh, OSSL_PKEY_PARAM_FFC_G, &bn_g)) {
+ BIO_printf(bio_err, "Error, failed to set DH parameters\n");
+ goto err;
+ }
+
+ if ((tmpl = OSSL_PARAM_BLD_new()) == NULL
+ || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P,
+ bn_p)
+ || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_Q,
+ bn_q)
+ || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G,
+ bn_g)
+ || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) {
+ BIO_printf(bio_err, "Error, failed to set DH parameters\n");
+ goto err;
+ }
+
+ ctx = EVP_PKEY_CTX_new_from_name(NULL, "DHX", NULL);
+ if (ctx == NULL
+ || EVP_PKEY_fromdata_init(ctx) <= 0
+ || EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_KEY_PARAMETERS, params) <= 0) {
+ BIO_printf(bio_err, "Error, failed to set DH parameters\n");
+ goto err;
+ }
+
+ err:
+ EVP_PKEY_CTX_free(ctx);
+ OSSL_PARAM_free(params);
+ OSSL_PARAM_BLD_free(tmpl);
+ BN_free(bn_p);
+ BN_free(bn_q);
+ BN_free(bn_g);
+ return pkey;
}
-#endif
+
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