evp.c revision 572a4e2e687520da9e518528d7371b794b1decc0 
1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to.  The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 *    notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 *    notice, this list of conditions and the following disclaimer in the
29 *    documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 *    must display the following acknowledgement:
32 *    "This product includes cryptographic software written by
33 *     Eric Young (eay@cryptsoft.com)"
34 *    The word 'cryptographic' can be left out if the rouines from the library
35 *    being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 *    the apps directory (application code) you must include an acknowledgement:
38 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed.  i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#include <openssl/evp.h>
58
59#include <assert.h>
60#include <string.h>
61
62#include <openssl/dsa.h>
63#include <openssl/ec.h>
64#include <openssl/err.h>
65#include <openssl/mem.h>
66#include <openssl/nid.h>
67#include <openssl/rsa.h>
68#include <openssl/thread.h>
69
70#include "internal.h"
71#include "../internal.h"
72
73
74EVP_PKEY *EVP_PKEY_new(void) {
75  EVP_PKEY *ret;
76
77  ret = OPENSSL_malloc(sizeof(EVP_PKEY));
78  if (ret == NULL) {
79    OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
80    return NULL;
81  }
82
83  OPENSSL_memset(ret, 0, sizeof(EVP_PKEY));
84  ret->type = EVP_PKEY_NONE;
85  ret->references = 1;
86
87  return ret;
88}
89
90static void free_it(EVP_PKEY *pkey) {
91  if (pkey->ameth && pkey->ameth->pkey_free) {
92    pkey->ameth->pkey_free(pkey);
93    pkey->pkey.ptr = NULL;
94    pkey->type = EVP_PKEY_NONE;
95  }
96}
97
98void EVP_PKEY_free(EVP_PKEY *pkey) {
99  if (pkey == NULL) {
100    return;
101  }
102
103  if (!CRYPTO_refcount_dec_and_test_zero(&pkey->references)) {
104    return;
105  }
106
107  free_it(pkey);
108  OPENSSL_free(pkey);
109}
110
111int EVP_PKEY_up_ref(EVP_PKEY *pkey) {
112  CRYPTO_refcount_inc(&pkey->references);
113  return 1;
114}
115
116int EVP_PKEY_is_opaque(const EVP_PKEY *pkey) {
117  if (pkey->ameth && pkey->ameth->pkey_opaque) {
118    return pkey->ameth->pkey_opaque(pkey);
119  }
120  return 0;
121}
122
123int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
124  if (a->type != b->type) {
125    return -1;
126  }
127
128  if (a->ameth) {
129    int ret;
130    /* Compare parameters if the algorithm has them */
131    if (a->ameth->param_cmp) {
132      ret = a->ameth->param_cmp(a, b);
133      if (ret <= 0) {
134        return ret;
135      }
136    }
137
138    if (a->ameth->pub_cmp) {
139      return a->ameth->pub_cmp(a, b);
140    }
141  }
142
143  return -2;
144}
145
146int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) {
147  if (to->type != from->type) {
148    OPENSSL_PUT_ERROR(EVP, EVP_R_DIFFERENT_KEY_TYPES);
149    goto err;
150  }
151
152  if (EVP_PKEY_missing_parameters(from)) {
153    OPENSSL_PUT_ERROR(EVP, EVP_R_MISSING_PARAMETERS);
154    goto err;
155  }
156
157  if (from->ameth && from->ameth->param_copy) {
158    return from->ameth->param_copy(to, from);
159  }
160
161err:
162  return 0;
163}
164
165int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) {
166  if (pkey->ameth && pkey->ameth->param_missing) {
167    return pkey->ameth->param_missing(pkey);
168  }
169  return 0;
170}
171
172int EVP_PKEY_size(const EVP_PKEY *pkey) {
173  if (pkey && pkey->ameth && pkey->ameth->pkey_size) {
174    return pkey->ameth->pkey_size(pkey);
175  }
176  return 0;
177}
178
179int EVP_PKEY_bits(EVP_PKEY *pkey) {
180  if (pkey && pkey->ameth && pkey->ameth->pkey_bits) {
181    return pkey->ameth->pkey_bits(pkey);
182  }
183  return 0;
184}
185
186int EVP_PKEY_id(const EVP_PKEY *pkey) {
187  return pkey->type;
188}
189
190/* evp_pkey_asn1_find returns the ASN.1 method table for the given |nid|, which
191 * should be one of the |EVP_PKEY_*| values. It returns NULL if |nid| is
192 * unknown. */
193static const EVP_PKEY_ASN1_METHOD *evp_pkey_asn1_find(int nid) {
194  switch (nid) {
195    case EVP_PKEY_RSA:
196      return &rsa_asn1_meth;
197    case EVP_PKEY_EC:
198      return &ec_asn1_meth;
199    case EVP_PKEY_DSA:
200      return &dsa_asn1_meth;
201    case EVP_PKEY_ED25519:
202      return &ed25519_asn1_meth;
203    default:
204      return NULL;
205  }
206}
207
208int EVP_PKEY_type(int nid) {
209  const EVP_PKEY_ASN1_METHOD *meth = evp_pkey_asn1_find(nid);
210  if (meth == NULL) {
211    return NID_undef;
212  }
213  return meth->pkey_id;
214}
215
216int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) {
217  if (EVP_PKEY_assign_RSA(pkey, key)) {
218    RSA_up_ref(key);
219    return 1;
220  }
221  return 0;
222}
223
224int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key) {
225  return EVP_PKEY_assign(pkey, EVP_PKEY_RSA, key);
226}
227
228RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey) {
229  if (pkey->type != EVP_PKEY_RSA) {
230    OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_RSA_KEY);
231    return NULL;
232  }
233  return pkey->pkey.rsa;
234}
235
236RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey) {
237  RSA *rsa = EVP_PKEY_get0_RSA(pkey);
238  if (rsa != NULL) {
239    RSA_up_ref(rsa);
240  }
241  return rsa;
242}
243
244int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) {
245  if (EVP_PKEY_assign_DSA(pkey, key)) {
246    DSA_up_ref(key);
247    return 1;
248  }
249  return 0;
250}
251
252int EVP_PKEY_assign_DSA(EVP_PKEY *pkey, DSA *key) {
253  return EVP_PKEY_assign(pkey, EVP_PKEY_DSA, key);
254}
255
256DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey) {
257  if (pkey->type != EVP_PKEY_DSA) {
258    OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_A_DSA_KEY);
259    return NULL;
260  }
261  return pkey->pkey.dsa;
262}
263
264DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) {
265  DSA *dsa = EVP_PKEY_get0_DSA(pkey);
266  if (dsa != NULL) {
267    DSA_up_ref(dsa);
268  }
269  return dsa;
270}
271
272int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) {
273  if (EVP_PKEY_assign_EC_KEY(pkey, key)) {
274    EC_KEY_up_ref(key);
275    return 1;
276  }
277  return 0;
278}
279
280int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) {
281  return EVP_PKEY_assign(pkey, EVP_PKEY_EC, key);
282}
283
284EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey) {
285  if (pkey->type != EVP_PKEY_EC) {
286    OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_EC_KEY_KEY);
287    return NULL;
288  }
289  return pkey->pkey.ec;
290}
291
292EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey) {
293  EC_KEY *ec_key = EVP_PKEY_get0_EC_KEY(pkey);
294  if (ec_key != NULL) {
295    EC_KEY_up_ref(ec_key);
296  }
297  return ec_key;
298}
299
300DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey) { return NULL; }
301
302int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) {
303  if (!EVP_PKEY_set_type(pkey, type)) {
304    return 0;
305  }
306  pkey->pkey.ptr = key;
307  return key != NULL;
308}
309
310int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) {
311  const EVP_PKEY_ASN1_METHOD *ameth;
312
313  if (pkey && pkey->pkey.ptr) {
314    free_it(pkey);
315  }
316
317  ameth = evp_pkey_asn1_find(type);
318  if (ameth == NULL) {
319    OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_ALGORITHM);
320    ERR_add_error_dataf("algorithm %d", type);
321    return 0;
322  }
323
324  if (pkey) {
325    pkey->ameth = ameth;
326    pkey->type = pkey->ameth->pkey_id;
327  }
328
329  return 1;
330}
331
332
333
334int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) {
335  if (a->type != b->type) {
336    return -1;
337  }
338  if (a->ameth && a->ameth->param_cmp) {
339    return a->ameth->param_cmp(a, b);
340  }
341  return -2;
342}
343
344int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) {
345  return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD, 0,
346                           (void *)md);
347}
348
349int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **out_md) {
350  return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_GET_MD,
351                           0, (void *)out_md);
352}
353
354void OpenSSL_add_all_algorithms(void) {}
355
356void OPENSSL_add_all_algorithms_conf(void) {}
357
358void OpenSSL_add_all_ciphers(void) {}
359
360void OpenSSL_add_all_digests(void) {}
361
362void EVP_cleanup(void) {}
363