/*
- * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* 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
* https://www.openssl.org/source/license.html
*/
-#ifndef OPENSSL_NO_DEPRECATED_3_0
-/* We need to use some deprecated APIs */
-# define OPENSSL_SUPPRESS_DEPRECATED
-#endif
#include <openssl/opensslconf.h>
#include <stdio.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>
-
-#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
-# include <openssl/dsa.h>
-#endif
+#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
-#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
-static int dh_cb(int p, int n, BN_GENCB *cb);
-#endif
+static EVP_PKEY *dsa_to_dh(EVP_PKEY *dh);
static int gendh_cb(EVP_PKEY_CTX *ctx);
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_3, OPT_5,
+ OPT_DSAPARAM, OPT_2, OPT_3, OPT_5,
OPT_R_ENUM, OPT_PROV_ENUM
} OPTION_CHOICE;
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
{"check", OPT_CHECK, '-', "Check the DH parameters"},
-#ifndef OPENSSL_NO_DSA
+#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_DEPRECATED_3_0)
{"dsaparam", OPT_DSAPARAM, '-',
"Read or generate DSA parameters, convert to DH"},
#endif
{"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"},
- {"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"},
int dhparam_main(int argc, char **argv)
{
BIO *in = NULL, *out = NULL;
- DH *dh = NULL, *alloc_dh = NULL;
- EVP_PKEY *pkey = NULL;
+ EVP_PKEY *pkey = NULL, *tmppkey = NULL;
EVP_PKEY_CTX *ctx = NULL;
char *infile = NULL, *outfile = NULL, *prog;
ENGINE *e = NULL;
-#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
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
-# ifdef OPENSSL_NO_DEPRECATED_3_0
- BIO_printf(bio_err, "The dsaparam option is deprecated.\n");
-# else
dsaparam = 1;
-# endif
-#endif
- break;
- case OPT_C:
- C = 1;
break;
case OPT_2:
g = 2;
break;
}
}
+
+ /* One optional argument, bitsize to generate. */
argc = opt_num_rest();
argv = opt_rest();
+ if (argc == 1) {
+ if (!opt_int(argv[0], &num) || num <= 0)
+ goto opthelp;
+ } else if (argc != 0) {
+ goto opthelp;
+ }
+ app_RAND_load();
- if (argv[0] != NULL && (!opt_int(argv[0], &num) || num <= 0))
- goto end;
if (g && !num)
num = DEFBITS;
-#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
if (dsaparam && g) {
BIO_printf(bio_err,
"Error, generator may not be chosen for DSA parameters\n");
goto end;
}
-#endif
out = bio_open_default(outfile, 'w', outformat);
if (out == NULL)
g = 2;
if (num) {
+ const char *alg = dsaparam ? "DSA" : "DH";
-
-#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
- if (dsaparam) {
- DSA *dsa = DSA_new();
- BN_GENCB *cb = BN_GENCB_new();
-
- if (cb == NULL)
- goto end;
-
- BN_GENCB_set(cb, dh_cb, bio_err);
-
+ ctx = EVP_PKEY_CTX_new_from_name(NULL, alg, NULL);
+ if (ctx == NULL) {
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);
- BIO_printf(bio_err, "Error, unable to generate DSA parameters\n");
- goto end;
- }
+ "Error, %s param generation context allocation failed\n",
+ alg);
+ goto end;
+ }
+ EVP_PKEY_CTX_set_cb(ctx, gendh_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 ");
- dh = alloc_dh = DSA_dup_DH(dsa);
- DSA_free(dsa);
- BN_GENCB_free(cb);
- if (dh == NULL)
- goto end;
- } else
-#endif
- {
- ctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL);
- if (ctx == NULL) {
- BIO_printf(bio_err,
- "Error, DH key generation context allocation failed\n");
- goto end;
- }
- EVP_PKEY_CTX_set_cb(ctx, gendh_cb);
- EVP_PKEY_CTX_set_app_data(ctx, bio_err);
+ if (!EVP_PKEY_paramgen_init(ctx)) {
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 (!EVP_PKEY_paramgen_init(ctx)) {
- BIO_printf(bio_err,
- "Error, unable to initialise DH param generation\n");
+ "Error, unable to initialise %s parameters\n",
+ alg);
+ goto end;
+ }
+
+ if (dsaparam) {
+ if (!EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, num)) {
+ BIO_printf(bio_err, "Error, unable to set DSA prime length\n");
goto end;
}
-
+ } 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;
}
- if (!EVP_PKEY_paramgen(ctx, &pkey)) {
- BIO_printf(bio_err, "Error, DH generation failed\n");
+ if (!EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, g)) {
+ BIO_printf(bio_err, "Error, unable to set generator\n");
goto end;
}
- dh = EVP_PKEY_get0_DH(pkey);
}
+
+ if (!EVP_PKEY_paramgen(ctx, &tmppkey)) {
+ BIO_printf(bio_err, "Error, %s generation failed\n", alg);
+ goto end;
+ }
+
+ 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;
-#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
- 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);
+ 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)
+ * TODO: We should fix this at some point
+ */
+ 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;
+ }
- if (dsa == NULL) {
+ if (dsaparam) {
+ if (!EVP_PKEY_is_a(tmppkey, "DSA")) {
BIO_printf(bio_err, "Error, unable to load DSA parameters\n");
goto end;
}
-
- dh = alloc_dh = DSA_dup_DH(dsa);
- DSA_free(dsa);
- if (dh == NULL)
+ pkey = dsa_to_dh(tmppkey);
+ if (pkey == NULL)
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 = alloc_dh = ASN1_d2i_bio_of(DH, DH_new, d2i_DHparams, in, NULL);
- /* BIO_reset() returns 0 for success for file BIOs only!!! */
- if (dh == NULL && BIO_reset(in) == 0)
- dh = alloc_dh = ASN1_d2i_bio_of(DH, DH_new, d2i_DHxparams, in, NULL);
- } else {
- /* informat == FORMAT_PEM */
- dh = alloc_dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
- }
-
- if (dh == NULL) {
+ } 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 */
}
if (text)
EVP_PKEY_print_params(out, pkey, 4, NULL);
if (check) {
- if (!EVP_PKEY_param_check(ctx) /* DH_check(dh, &i) */) {
- BIO_printf(bio_err, "Error, invalid parameters generated\n");
+ 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;
}
- BIO_printf(bio_err, "DH parameters appear to be ok.\n");
- if (num != 0) {
- /*
- * We have generated parameters but DH_check() indicates they are
- * invalid! This should never happen!
- */
+ 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;
-
- dh = EVP_PKEY_get0_DH(pkey);
- len = EVP_PKEY_size(pkey);
- bits = EVP_PKEY_size(pkey);
- 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);
+ 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) {
- if (q != NULL)
- i = ASN1_i2d_bio_of(DH, i2d_DHxparams, out, dh);
- else
- i = ASN1_i2d_bio_of(DH, i2d_DHparams, out, dh);
- } else if (q != NULL) {
- i = PEM_write_bio_DHxparams(out, dh);
- } else {
- i = PEM_write_bio_DHparams(out, dh);
- }
- if (!i) {
+ 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);
- DH_free(alloc_dh);
BIO_free(in);
BIO_free_all(out);
EVP_PKEY_free(pkey);
+ EVP_PKEY_free(tmppkey);
EVP_PKEY_CTX_free(ctx);
release_engine(e);
return ret;
}
-static int common_dh_cb(int p, BIO *b)
+/*
+ * 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)
{
- static const char symbols[] = ".+*\n";
- char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
+ 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;
- BIO_write(b, &c, 1);
- (void)BIO_flush(b);
- return 1;
-}
+ 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 !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
-static int dh_cb(int p, int n, BN_GENCB *cb)
-{
- return common_dh_cb(p, BN_GENCB_get_arg(cb));
+ 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)
+ || !EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_KEY_PARAMETERS, params)) {
+ 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
static int gendh_cb(EVP_PKEY_CTX *ctx)
{
- return common_dh_cb(EVP_PKEY_CTX_get_keygen_info(ctx, 0),
- EVP_PKEY_CTX_get_app_data(ctx));
+ int p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
+ BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
+ static const char symbols[] = ".+*\n";
+ char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
+
+ BIO_write(b, &c, 1);
+ (void)BIO_flush(b);
+ return 1;
}
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