1 /* crypto/evp/p_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
61 #include <openssl/bn.h>
62 #include <openssl/err.h>
63 #include <openssl/objects.h>
64 #include <openssl/evp.h>
65 #include <openssl/asn1_mac.h>
66 #include <openssl/x509.h>
67 #ifndef OPENSSL_NO_RSA
68 # include <openssl/rsa.h>
70 #ifndef OPENSSL_NO_DSA
71 # include <openssl/dsa.h>
74 # include <openssl/dh.h>
77 #ifndef OPENSSL_NO_ENGINE
78 # include <openssl/engine.h>
81 #include "asn1_locl.h"
83 static void EVP_PKEY_free_it(EVP_PKEY
*x
);
85 int EVP_PKEY_bits(EVP_PKEY
*pkey
)
87 if (pkey
&& pkey
->ameth
&& pkey
->ameth
->pkey_bits
)
88 return pkey
->ameth
->pkey_bits(pkey
);
92 int EVP_PKEY_size(EVP_PKEY
*pkey
)
94 if (pkey
&& pkey
->ameth
&& pkey
->ameth
->pkey_size
)
95 return pkey
->ameth
->pkey_size(pkey
);
99 int EVP_PKEY_save_parameters(EVP_PKEY
*pkey
, int mode
)
101 #ifndef OPENSSL_NO_DSA
102 if (pkey
->type
== EVP_PKEY_DSA
) {
103 int ret
= pkey
->save_parameters
;
106 pkey
->save_parameters
= mode
;
110 #ifndef OPENSSL_NO_EC
111 if (pkey
->type
== EVP_PKEY_EC
) {
112 int ret
= pkey
->save_parameters
;
115 pkey
->save_parameters
= mode
;
122 int EVP_PKEY_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
124 if (to
->type
!= from
->type
) {
125 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS
, EVP_R_DIFFERENT_KEY_TYPES
);
129 if (EVP_PKEY_missing_parameters(from
)) {
130 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS
, EVP_R_MISSING_PARAMETERS
);
133 if (from
->ameth
&& from
->ameth
->param_copy
)
134 return from
->ameth
->param_copy(to
, from
);
139 int EVP_PKEY_missing_parameters(const EVP_PKEY
*pkey
)
141 if (pkey
->ameth
&& pkey
->ameth
->param_missing
)
142 return pkey
->ameth
->param_missing(pkey
);
146 int EVP_PKEY_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
148 if (a
->type
!= b
->type
)
150 if (a
->ameth
&& a
->ameth
->param_cmp
)
151 return a
->ameth
->param_cmp(a
, b
);
155 int EVP_PKEY_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
157 if (a
->type
!= b
->type
)
162 /* Compare parameters if the algorithm has them */
163 if (a
->ameth
->param_cmp
) {
164 ret
= a
->ameth
->param_cmp(a
, b
);
169 if (a
->ameth
->pub_cmp
)
170 return a
->ameth
->pub_cmp(a
, b
);
176 EVP_PKEY
*EVP_PKEY_new(void)
180 ret
= (EVP_PKEY
*)OPENSSL_malloc(sizeof(EVP_PKEY
));
182 EVPerr(EVP_F_EVP_PKEY_NEW
, ERR_R_MALLOC_FAILURE
);
185 ret
->type
= EVP_PKEY_NONE
;
186 ret
->save_type
= EVP_PKEY_NONE
;
190 ret
->pkey
.ptr
= NULL
;
191 ret
->attributes
= NULL
;
192 ret
->save_parameters
= 1;
197 * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
198 * is NULL just return 1 or 0 if the algorithm exists.
201 static int pkey_set_type(EVP_PKEY
*pkey
, int type
, const char *str
, int len
)
203 const EVP_PKEY_ASN1_METHOD
*ameth
;
207 EVP_PKEY_free_it(pkey
);
209 * If key type matches and a method exists then this lookup has
210 * succeeded once so just indicate success.
212 if ((type
== pkey
->save_type
) && pkey
->ameth
)
214 #ifndef OPENSSL_NO_ENGINE
215 /* If we have an ENGINE release it */
217 ENGINE_finish(pkey
->engine
);
223 ameth
= EVP_PKEY_asn1_find_str(&e
, str
, len
);
225 ameth
= EVP_PKEY_asn1_find(&e
, type
);
226 #ifndef OPENSSL_NO_ENGINE
231 EVPerr(EVP_F_PKEY_SET_TYPE
, EVP_R_UNSUPPORTED_ALGORITHM
);
238 pkey
->type
= pkey
->ameth
->pkey_id
;
239 pkey
->save_type
= type
;
244 int EVP_PKEY_set_type(EVP_PKEY
*pkey
, int type
)
246 return pkey_set_type(pkey
, type
, NULL
, -1);
249 int EVP_PKEY_set_type_str(EVP_PKEY
*pkey
, const char *str
, int len
)
251 return pkey_set_type(pkey
, EVP_PKEY_NONE
, str
, len
);
254 int EVP_PKEY_assign(EVP_PKEY
*pkey
, int type
, void *key
)
256 if (pkey
== NULL
|| !EVP_PKEY_set_type(pkey
, type
))
258 pkey
->pkey
.ptr
= key
;
259 return (key
!= NULL
);
262 void *EVP_PKEY_get0(EVP_PKEY
*pkey
)
264 return pkey
->pkey
.ptr
;
267 #ifndef OPENSSL_NO_RSA
268 int EVP_PKEY_set1_RSA(EVP_PKEY
*pkey
, RSA
*key
)
270 int ret
= EVP_PKEY_assign_RSA(pkey
, key
);
276 RSA
*EVP_PKEY_get1_RSA(EVP_PKEY
*pkey
)
278 if (pkey
->type
!= EVP_PKEY_RSA
) {
279 EVPerr(EVP_F_EVP_PKEY_GET1_RSA
, EVP_R_EXPECTING_AN_RSA_KEY
);
282 RSA_up_ref(pkey
->pkey
.rsa
);
283 return pkey
->pkey
.rsa
;
287 #ifndef OPENSSL_NO_DSA
288 int EVP_PKEY_set1_DSA(EVP_PKEY
*pkey
, DSA
*key
)
290 int ret
= EVP_PKEY_assign_DSA(pkey
, key
);
296 DSA
*EVP_PKEY_get1_DSA(EVP_PKEY
*pkey
)
298 if (pkey
->type
!= EVP_PKEY_DSA
) {
299 EVPerr(EVP_F_EVP_PKEY_GET1_DSA
, EVP_R_EXPECTING_A_DSA_KEY
);
302 DSA_up_ref(pkey
->pkey
.dsa
);
303 return pkey
->pkey
.dsa
;
307 #ifndef OPENSSL_NO_EC
309 int EVP_PKEY_set1_EC_KEY(EVP_PKEY
*pkey
, EC_KEY
*key
)
311 int ret
= EVP_PKEY_assign_EC_KEY(pkey
, key
);
317 EC_KEY
*EVP_PKEY_get1_EC_KEY(EVP_PKEY
*pkey
)
319 if (pkey
->type
!= EVP_PKEY_EC
) {
320 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY
, EVP_R_EXPECTING_A_EC_KEY
);
323 EC_KEY_up_ref(pkey
->pkey
.ec
);
324 return pkey
->pkey
.ec
;
328 #ifndef OPENSSL_NO_DH
330 int EVP_PKEY_set1_DH(EVP_PKEY
*pkey
, DH
*key
)
332 int ret
= EVP_PKEY_assign_DH(pkey
, key
);
338 DH
*EVP_PKEY_get1_DH(EVP_PKEY
*pkey
)
340 if (pkey
->type
!= EVP_PKEY_DH
&& pkey
->type
!= EVP_PKEY_DHX
) {
341 EVPerr(EVP_F_EVP_PKEY_GET1_DH
, EVP_R_EXPECTING_A_DH_KEY
);
344 DH_up_ref(pkey
->pkey
.dh
);
345 return pkey
->pkey
.dh
;
349 int EVP_PKEY_type(int type
)
352 const EVP_PKEY_ASN1_METHOD
*ameth
;
354 ameth
= EVP_PKEY_asn1_find(&e
, type
);
356 ret
= ameth
->pkey_id
;
359 #ifndef OPENSSL_NO_ENGINE
366 int EVP_PKEY_id(const EVP_PKEY
*pkey
)
371 int EVP_PKEY_base_id(const EVP_PKEY
*pkey
)
373 return EVP_PKEY_type(pkey
->type
);
376 void EVP_PKEY_free(EVP_PKEY
*x
)
383 i
= CRYPTO_add(&x
->references
, -1, CRYPTO_LOCK_EVP_PKEY
);
385 REF_PRINT("EVP_PKEY", x
);
391 fprintf(stderr
, "EVP_PKEY_free, bad reference count\n");
397 sk_X509_ATTRIBUTE_pop_free(x
->attributes
, X509_ATTRIBUTE_free
);
401 static void EVP_PKEY_free_it(EVP_PKEY
*x
)
403 if (x
->ameth
&& x
->ameth
->pkey_free
) {
404 x
->ameth
->pkey_free(x
);
407 #ifndef OPENSSL_NO_ENGINE
409 ENGINE_finish(x
->engine
);
415 static int unsup_alg(BIO
*out
, const EVP_PKEY
*pkey
, int indent
,
418 BIO_indent(out
, indent
, 128);
419 BIO_printf(out
, "%s algorithm \"%s\" unsupported\n",
420 kstr
, OBJ_nid2ln(pkey
->type
));
424 int EVP_PKEY_print_public(BIO
*out
, const EVP_PKEY
*pkey
,
425 int indent
, ASN1_PCTX
*pctx
)
427 if (pkey
->ameth
&& pkey
->ameth
->pub_print
)
428 return pkey
->ameth
->pub_print(out
, pkey
, indent
, pctx
);
430 return unsup_alg(out
, pkey
, indent
, "Public Key");
433 int EVP_PKEY_print_private(BIO
*out
, const EVP_PKEY
*pkey
,
434 int indent
, ASN1_PCTX
*pctx
)
436 if (pkey
->ameth
&& pkey
->ameth
->priv_print
)
437 return pkey
->ameth
->priv_print(out
, pkey
, indent
, pctx
);
439 return unsup_alg(out
, pkey
, indent
, "Private Key");
442 int EVP_PKEY_print_params(BIO
*out
, const EVP_PKEY
*pkey
,
443 int indent
, ASN1_PCTX
*pctx
)
445 if (pkey
->ameth
&& pkey
->ameth
->param_print
)
446 return pkey
->ameth
->param_print(out
, pkey
, indent
, pctx
);
447 return unsup_alg(out
, pkey
, indent
, "Parameters");
450 int EVP_PKEY_get_default_digest_nid(EVP_PKEY
*pkey
, int *pnid
)
452 if (!pkey
->ameth
|| !pkey
->ameth
->pkey_ctrl
)
454 return pkey
->ameth
->pkey_ctrl(pkey
, ASN1_PKEY_CTRL_DEFAULT_MD_NID
,