1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 /* ====================================================================
5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
60 #include <openssl/asn1t.h>
61 #include <openssl/x509.h>
62 #include <openssl/evp.h>
63 #include <openssl/dh.h>
64 #include <openssl/bn.h>
65 #ifndef OPENSSL_NO_DSA
66 #include <openssl/dsa.h>
70 /* DH pkey context structure */
74 /* Parameter gen parameters */
81 /* Keygen callback info */
86 static int pkey_dh_init(EVP_PKEY_CTX *ctx)
89 dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX));
92 dctx->prime_len = 1024;
93 dctx->subprime_len = -1;
97 dctx->rfc5114_param = 0;
100 ctx->keygen_info = dctx->gentmp;
101 ctx->keygen_info_count = 2;
106 static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
108 DH_PKEY_CTX *dctx, *sctx;
109 if (!pkey_dh_init(dst))
113 dctx->prime_len = sctx->prime_len;
114 dctx->subprime_len = sctx->subprime_len;
115 dctx->generator = sctx->generator;
116 dctx->use_dsa = sctx->use_dsa;
118 dctx->rfc5114_param = sctx->rfc5114_param;
122 static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx)
124 DH_PKEY_CTX *dctx = ctx->data;
129 static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
131 DH_PKEY_CTX *dctx = ctx->data;
134 case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
137 dctx->prime_len = p1;
140 case EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN:
141 if (dctx->use_dsa == 0)
143 dctx->subprime_len = p1;
146 case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
149 dctx->generator = p1;
152 case EVP_PKEY_CTRL_DH_PARAMGEN_TYPE:
153 #ifdef OPENSSL_NO_DSA
157 if (p1 < 0 || p1 > 2)
163 case EVP_PKEY_CTRL_DH_RFC5114:
164 if (p1 < 1 || p1 > 3)
166 dctx->rfc5114_param = p1;
169 case EVP_PKEY_CTRL_PEER_KEY:
170 /* Default behaviour is OK */
180 static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx,
181 const char *type, const char *value)
183 if (!strcmp(type, "dh_paramgen_prime_len"))
187 return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len);
189 if (!strcmp(type, "dh_rfc5114"))
191 DH_PKEY_CTX *dctx = ctx->data;
194 if (len < 0 || len > 3)
196 dctx->rfc5114_param = len;
199 if (!strcmp(type, "dh_paramgen_generator"))
203 return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len);
205 if (!strcmp(type, "dh_paramgen_subprime_len"))
209 return EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, len);
211 if (!strcmp(type, "dh_paramgen_type"))
215 return EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ);
220 #ifndef OPENSSL_NO_DSA
222 extern int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
223 const EVP_MD *evpmd, const unsigned char *seed_in, size_t seed_len,
224 unsigned char *seed_out,
225 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb);
227 extern int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
228 const EVP_MD *evpmd, const unsigned char *seed_in, size_t seed_len,
229 int idx, unsigned char *seed_out,
230 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb);
232 static DSA *dsa_dh_generate(DH_PKEY_CTX *dctx, BN_GENCB *pcb)
236 int prime_len = dctx->prime_len;
237 int subprime_len = dctx->subprime_len;
238 const EVP_MD *md = dctx->md;
239 if (dctx->use_dsa > 2)
244 if (subprime_len == -1)
246 if (prime_len >= 2048)
253 if (prime_len >= 2048)
258 if (dctx->use_dsa == 1)
259 rv = dsa_builtin_paramgen(ret, prime_len, subprime_len, md,
260 NULL, 0, NULL, NULL, NULL, pcb);
261 else if(dctx->use_dsa == 2)
262 rv = dsa_builtin_paramgen2(ret, prime_len, subprime_len, md,
263 NULL, 0, -1, NULL, NULL, NULL, pcb);
274 static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
277 DH_PKEY_CTX *dctx = ctx->data;
280 if (dctx->rfc5114_param)
282 switch (dctx->rfc5114_param)
285 dh = DH_get_1024_160();
289 dh = DH_get_2048_224();
293 dh = DH_get_2048_256();
299 EVP_PKEY_assign(pkey, EVP_PKEY_DHX, dh);
306 evp_pkey_set_cb_translate(pcb, ctx);
310 #ifndef OPENSSL_NO_DSA
314 dsa_dh = dsa_dh_generate(dctx, pcb);
317 dh = DSA_dup_DH(dsa_dh);
321 EVP_PKEY_assign(pkey, EVP_PKEY_DHX, dh);
328 ret = DH_generate_parameters_ex(dh,
329 dctx->prime_len, dctx->generator, pcb);
332 EVP_PKEY_assign_DH(pkey, dh);
338 static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
341 if (ctx->pkey == NULL)
343 DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
349 EVP_PKEY_assign(pkey, ctx->pmeth->pkey_id, dh);
350 /* Note: if error return, pkey is freed by parent routine */
351 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
353 return DH_generate_key(pkey->pkey.dh);
356 static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)
359 if (!ctx->pkey || !ctx->peerkey)
361 DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
364 ret = DH_compute_key(key, ctx->peerkey->pkey.dh->pub_key,
372 const EVP_PKEY_METHOD dh_pkey_meth =
375 EVP_PKEY_FLAG_AUTOARGLEN,
408 const EVP_PKEY_METHOD dhx_pkey_meth =
411 EVP_PKEY_FLAG_AUTOARGLEN,