1 /*
2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include "e_os.h" /* for strncasecmp */
11 #include "internal/cryptlib.h"
12 #include <stdio.h>
13 #include <openssl/asn1t.h>
14 #include <openssl/x509.h>
15 #include <openssl/engine.h>
16 #include "crypto/asn1.h"
17 #include "crypto/evp.h"
18
19 #include "standard_methods.h"
20
21 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
22 static STACK_OF(EVP_PKEY_ASN1_METHOD) *app_methods = NULL;
23
24 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
25 const EVP_PKEY_ASN1_METHOD *, ameth);
26
ameth_cmp(const EVP_PKEY_ASN1_METHOD * const * a,const EVP_PKEY_ASN1_METHOD * const * b)27 static int ameth_cmp(const EVP_PKEY_ASN1_METHOD *const *a,
28 const EVP_PKEY_ASN1_METHOD *const *b)
29 {
30 return ((*a)->pkey_id - (*b)->pkey_id);
31 }
32
33 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
34 const EVP_PKEY_ASN1_METHOD *, ameth);
35
EVP_PKEY_asn1_get_count(void)36 int EVP_PKEY_asn1_get_count(void)
37 {
38 int num = OSSL_NELEM(standard_methods);
39 if (app_methods)
40 num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods);
41 return num;
42 }
43
EVP_PKEY_asn1_get0(int idx)44 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx)
45 {
46 int num = OSSL_NELEM(standard_methods);
47 if (idx < 0)
48 return NULL;
49 if (idx < num)
50 return standard_methods[idx];
51 idx -= num;
52 return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
53 }
54
pkey_asn1_find(int type)55 static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type)
56 {
57 EVP_PKEY_ASN1_METHOD tmp;
58 const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret;
59 tmp.pkey_id = type;
60 if (app_methods) {
61 int idx;
62 idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp);
63 if (idx >= 0)
64 return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
65 }
66 ret = OBJ_bsearch_ameth(&t, standard_methods, OSSL_NELEM(standard_methods));
67 if (!ret || !*ret)
68 return NULL;
69 return *ret;
70 }
71
72 /*
73 * Find an implementation of an ASN1 algorithm. If 'pe' is not NULL also
74 * search through engines and set *pe to a functional reference to the engine
75 * implementing 'type' or NULL if no engine implements it.
76 */
77
EVP_PKEY_asn1_find(ENGINE ** pe,int type)78 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type)
79 {
80 const EVP_PKEY_ASN1_METHOD *t;
81
82 for (;;) {
83 t = pkey_asn1_find(type);
84 if (!t || !(t->pkey_flags & ASN1_PKEY_ALIAS))
85 break;
86 type = t->pkey_base_id;
87 }
88 if (pe) {
89 #ifndef OPENSSL_NO_ENGINE
90 ENGINE *e;
91 /* type will contain the final unaliased type */
92 e = ENGINE_get_pkey_asn1_meth_engine(type);
93 if (e) {
94 *pe = e;
95 return ENGINE_get_pkey_asn1_meth(e, type);
96 }
97 #endif
98 *pe = NULL;
99 }
100 return t;
101 }
102
EVP_PKEY_asn1_find_str(ENGINE ** pe,const char * str,int len)103 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
104 const char *str, int len)
105 {
106 int i;
107 const EVP_PKEY_ASN1_METHOD *ameth = NULL;
108
109 if (len == -1)
110 len = strlen(str);
111 if (pe) {
112 #ifndef OPENSSL_NO_ENGINE
113 ENGINE *e;
114 ameth = ENGINE_pkey_asn1_find_str(&e, str, len);
115 if (ameth) {
116 /*
117 * Convert structural into functional reference
118 */
119 if (!ENGINE_init(e))
120 ameth = NULL;
121 ENGINE_free(e);
122 *pe = e;
123 return ameth;
124 }
125 #endif
126 *pe = NULL;
127 }
128 for (i = EVP_PKEY_asn1_get_count(); i-- > 0; ) {
129 ameth = EVP_PKEY_asn1_get0(i);
130 if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
131 continue;
132 if ((int)strlen(ameth->pem_str) == len
133 && strncasecmp(ameth->pem_str, str, len) == 0)
134 return ameth;
135 }
136 return NULL;
137 }
138
EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD * ameth)139 int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth)
140 {
141 EVP_PKEY_ASN1_METHOD tmp = { 0, };
142
143 /*
144 * One of the following must be true:
145 *
146 * pem_str == NULL AND ASN1_PKEY_ALIAS is set
147 * pem_str != NULL AND ASN1_PKEY_ALIAS is clear
148 *
149 * Anything else is an error and may lead to a corrupt ASN1 method table
150 */
151 if (!((ameth->pem_str == NULL
152 && (ameth->pkey_flags & ASN1_PKEY_ALIAS) != 0)
153 || (ameth->pem_str != NULL
154 && (ameth->pkey_flags & ASN1_PKEY_ALIAS) == 0))) {
155 EVPerr(EVP_F_EVP_PKEY_ASN1_ADD0, ERR_R_PASSED_INVALID_ARGUMENT);
156 return 0;
157 }
158
159 if (app_methods == NULL) {
160 app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
161 if (app_methods == NULL)
162 return 0;
163 }
164
165 tmp.pkey_id = ameth->pkey_id;
166 if (sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp) >= 0) {
167 EVPerr(EVP_F_EVP_PKEY_ASN1_ADD0,
168 EVP_R_PKEY_APPLICATION_ASN1_METHOD_ALREADY_REGISTERED);
169 return 0;
170 }
171
172 if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth))
173 return 0;
174 sk_EVP_PKEY_ASN1_METHOD_sort(app_methods);
175 return 1;
176 }
177
EVP_PKEY_asn1_add_alias(int to,int from)178 int EVP_PKEY_asn1_add_alias(int to, int from)
179 {
180 EVP_PKEY_ASN1_METHOD *ameth;
181 ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL);
182 if (ameth == NULL)
183 return 0;
184 ameth->pkey_base_id = to;
185 if (!EVP_PKEY_asn1_add0(ameth)) {
186 EVP_PKEY_asn1_free(ameth);
187 return 0;
188 }
189 return 1;
190 }
191
EVP_PKEY_asn1_get0_info(int * ppkey_id,int * ppkey_base_id,int * ppkey_flags,const char ** pinfo,const char ** ppem_str,const EVP_PKEY_ASN1_METHOD * ameth)192 int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id,
193 int *ppkey_flags, const char **pinfo,
194 const char **ppem_str,
195 const EVP_PKEY_ASN1_METHOD *ameth)
196 {
197 if (!ameth)
198 return 0;
199 if (ppkey_id)
200 *ppkey_id = ameth->pkey_id;
201 if (ppkey_base_id)
202 *ppkey_base_id = ameth->pkey_base_id;
203 if (ppkey_flags)
204 *ppkey_flags = ameth->pkey_flags;
205 if (pinfo)
206 *pinfo = ameth->info;
207 if (ppem_str)
208 *ppem_str = ameth->pem_str;
209 return 1;
210 }
211
EVP_PKEY_get0_asn1(const EVP_PKEY * pkey)212 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(const EVP_PKEY *pkey)
213 {
214 return pkey->ameth;
215 }
216
EVP_PKEY_asn1_new(int id,int flags,const char * pem_str,const char * info)217 EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
218 const char *pem_str, const char *info)
219 {
220 EVP_PKEY_ASN1_METHOD *ameth = OPENSSL_zalloc(sizeof(*ameth));
221
222 if (ameth == NULL)
223 return NULL;
224
225 ameth->pkey_id = id;
226 ameth->pkey_base_id = id;
227 ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC;
228
229 if (info) {
230 ameth->info = OPENSSL_strdup(info);
231 if (!ameth->info)
232 goto err;
233 }
234
235 if (pem_str) {
236 ameth->pem_str = OPENSSL_strdup(pem_str);
237 if (!ameth->pem_str)
238 goto err;
239 }
240
241 return ameth;
242
243 err:
244 EVP_PKEY_asn1_free(ameth);
245 return NULL;
246
247 }
248
EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD * dst,const EVP_PKEY_ASN1_METHOD * src)249 void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
250 const EVP_PKEY_ASN1_METHOD *src)
251 {
252
253 dst->pub_decode = src->pub_decode;
254 dst->pub_encode = src->pub_encode;
255 dst->pub_cmp = src->pub_cmp;
256 dst->pub_print = src->pub_print;
257
258 dst->priv_decode = src->priv_decode;
259 dst->priv_encode = src->priv_encode;
260 dst->priv_print = src->priv_print;
261
262 dst->old_priv_encode = src->old_priv_encode;
263 dst->old_priv_decode = src->old_priv_decode;
264
265 dst->pkey_size = src->pkey_size;
266 dst->pkey_bits = src->pkey_bits;
267
268 dst->param_decode = src->param_decode;
269 dst->param_encode = src->param_encode;
270 dst->param_missing = src->param_missing;
271 dst->param_copy = src->param_copy;
272 dst->param_cmp = src->param_cmp;
273 dst->param_print = src->param_print;
274
275 dst->pkey_free = src->pkey_free;
276 dst->pkey_ctrl = src->pkey_ctrl;
277
278 dst->item_sign = src->item_sign;
279 dst->item_verify = src->item_verify;
280
281 dst->siginf_set = src->siginf_set;
282
283 dst->pkey_check = src->pkey_check;
284
285 }
286
EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD * ameth)287 void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth)
288 {
289 if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC)) {
290 OPENSSL_free(ameth->pem_str);
291 OPENSSL_free(ameth->info);
292 OPENSSL_free(ameth);
293 }
294 }
295
EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD * ameth,int (* pub_decode)(EVP_PKEY * pk,X509_PUBKEY * pub),int (* pub_encode)(X509_PUBKEY * pub,const EVP_PKEY * pk),int (* pub_cmp)(const EVP_PKEY * a,const EVP_PKEY * b),int (* pub_print)(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx),int (* pkey_size)(const EVP_PKEY * pk),int (* pkey_bits)(const EVP_PKEY * pk))296 void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
297 int (*pub_decode) (EVP_PKEY *pk,
298 X509_PUBKEY *pub),
299 int (*pub_encode) (X509_PUBKEY *pub,
300 const EVP_PKEY *pk),
301 int (*pub_cmp) (const EVP_PKEY *a,
302 const EVP_PKEY *b),
303 int (*pub_print) (BIO *out,
304 const EVP_PKEY *pkey,
305 int indent, ASN1_PCTX *pctx),
306 int (*pkey_size) (const EVP_PKEY *pk),
307 int (*pkey_bits) (const EVP_PKEY *pk))
308 {
309 ameth->pub_decode = pub_decode;
310 ameth->pub_encode = pub_encode;
311 ameth->pub_cmp = pub_cmp;
312 ameth->pub_print = pub_print;
313 ameth->pkey_size = pkey_size;
314 ameth->pkey_bits = pkey_bits;
315 }
316
EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD * ameth,int (* priv_decode)(EVP_PKEY * pk,const PKCS8_PRIV_KEY_INFO * p8inf),int (* priv_encode)(PKCS8_PRIV_KEY_INFO * p8,const EVP_PKEY * pk),int (* priv_print)(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx))317 void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
318 int (*priv_decode) (EVP_PKEY *pk,
319 const PKCS8_PRIV_KEY_INFO
320 *p8inf),
321 int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
322 const EVP_PKEY *pk),
323 int (*priv_print) (BIO *out,
324 const EVP_PKEY *pkey,
325 int indent,
326 ASN1_PCTX *pctx))
327 {
328 ameth->priv_decode = priv_decode;
329 ameth->priv_encode = priv_encode;
330 ameth->priv_print = priv_print;
331 }
332
EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD * ameth,int (* param_decode)(EVP_PKEY * pkey,const unsigned char ** pder,int derlen),int (* param_encode)(const EVP_PKEY * pkey,unsigned char ** pder),int (* param_missing)(const EVP_PKEY * pk),int (* param_copy)(EVP_PKEY * to,const EVP_PKEY * from),int (* param_cmp)(const EVP_PKEY * a,const EVP_PKEY * b),int (* param_print)(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx))333 void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
334 int (*param_decode) (EVP_PKEY *pkey,
335 const unsigned char **pder,
336 int derlen),
337 int (*param_encode) (const EVP_PKEY *pkey,
338 unsigned char **pder),
339 int (*param_missing) (const EVP_PKEY *pk),
340 int (*param_copy) (EVP_PKEY *to,
341 const EVP_PKEY *from),
342 int (*param_cmp) (const EVP_PKEY *a,
343 const EVP_PKEY *b),
344 int (*param_print) (BIO *out,
345 const EVP_PKEY *pkey,
346 int indent, ASN1_PCTX *pctx))
347 {
348 ameth->param_decode = param_decode;
349 ameth->param_encode = param_encode;
350 ameth->param_missing = param_missing;
351 ameth->param_copy = param_copy;
352 ameth->param_cmp = param_cmp;
353 ameth->param_print = param_print;
354 }
355
EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD * ameth,void (* pkey_free)(EVP_PKEY * pkey))356 void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
357 void (*pkey_free) (EVP_PKEY *pkey))
358 {
359 ameth->pkey_free = pkey_free;
360 }
361
EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD * ameth,int (* pkey_ctrl)(EVP_PKEY * pkey,int op,long arg1,void * arg2))362 void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
363 int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
364 long arg1, void *arg2))
365 {
366 ameth->pkey_ctrl = pkey_ctrl;
367 }
368
EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD * ameth,int (* pkey_security_bits)(const EVP_PKEY * pk))369 void EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD *ameth,
370 int (*pkey_security_bits) (const EVP_PKEY
371 *pk))
372 {
373 ameth->pkey_security_bits = pkey_security_bits;
374 }
375
EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD * ameth,int (* item_verify)(EVP_MD_CTX * ctx,const ASN1_ITEM * it,void * asn,X509_ALGOR * a,ASN1_BIT_STRING * sig,EVP_PKEY * pkey),int (* item_sign)(EVP_MD_CTX * ctx,const ASN1_ITEM * it,void * asn,X509_ALGOR * alg1,X509_ALGOR * alg2,ASN1_BIT_STRING * sig))376 void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
377 int (*item_verify) (EVP_MD_CTX *ctx,
378 const ASN1_ITEM *it,
379 void *asn,
380 X509_ALGOR *a,
381 ASN1_BIT_STRING *sig,
382 EVP_PKEY *pkey),
383 int (*item_sign) (EVP_MD_CTX *ctx,
384 const ASN1_ITEM *it,
385 void *asn,
386 X509_ALGOR *alg1,
387 X509_ALGOR *alg2,
388 ASN1_BIT_STRING *sig))
389 {
390 ameth->item_sign = item_sign;
391 ameth->item_verify = item_verify;
392 }
393
EVP_PKEY_asn1_set_siginf(EVP_PKEY_ASN1_METHOD * ameth,int (* siginf_set)(X509_SIG_INFO * siginf,const X509_ALGOR * alg,const ASN1_STRING * sig))394 void EVP_PKEY_asn1_set_siginf(EVP_PKEY_ASN1_METHOD *ameth,
395 int (*siginf_set) (X509_SIG_INFO *siginf,
396 const X509_ALGOR *alg,
397 const ASN1_STRING *sig))
398 {
399 ameth->siginf_set = siginf_set;
400 }
401
EVP_PKEY_asn1_set_check(EVP_PKEY_ASN1_METHOD * ameth,int (* pkey_check)(const EVP_PKEY * pk))402 void EVP_PKEY_asn1_set_check(EVP_PKEY_ASN1_METHOD *ameth,
403 int (*pkey_check) (const EVP_PKEY *pk))
404 {
405 ameth->pkey_check = pkey_check;
406 }
407
EVP_PKEY_asn1_set_public_check(EVP_PKEY_ASN1_METHOD * ameth,int (* pkey_pub_check)(const EVP_PKEY * pk))408 void EVP_PKEY_asn1_set_public_check(EVP_PKEY_ASN1_METHOD *ameth,
409 int (*pkey_pub_check) (const EVP_PKEY *pk))
410 {
411 ameth->pkey_public_check = pkey_pub_check;
412 }
413
EVP_PKEY_asn1_set_param_check(EVP_PKEY_ASN1_METHOD * ameth,int (* pkey_param_check)(const EVP_PKEY * pk))414 void EVP_PKEY_asn1_set_param_check(EVP_PKEY_ASN1_METHOD *ameth,
415 int (*pkey_param_check) (const EVP_PKEY *pk))
416 {
417 ameth->pkey_param_check = pkey_param_check;
418 }
419
EVP_PKEY_asn1_set_set_priv_key(EVP_PKEY_ASN1_METHOD * ameth,int (* set_priv_key)(EVP_PKEY * pk,const unsigned char * priv,size_t len))420 void EVP_PKEY_asn1_set_set_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
421 int (*set_priv_key) (EVP_PKEY *pk,
422 const unsigned char
423 *priv,
424 size_t len))
425 {
426 ameth->set_priv_key = set_priv_key;
427 }
428
EVP_PKEY_asn1_set_set_pub_key(EVP_PKEY_ASN1_METHOD * ameth,int (* set_pub_key)(EVP_PKEY * pk,const unsigned char * pub,size_t len))429 void EVP_PKEY_asn1_set_set_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
430 int (*set_pub_key) (EVP_PKEY *pk,
431 const unsigned char *pub,
432 size_t len))
433 {
434 ameth->set_pub_key = set_pub_key;
435 }
436
EVP_PKEY_asn1_set_get_priv_key(EVP_PKEY_ASN1_METHOD * ameth,int (* get_priv_key)(const EVP_PKEY * pk,unsigned char * priv,size_t * len))437 void EVP_PKEY_asn1_set_get_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
438 int (*get_priv_key) (const EVP_PKEY *pk,
439 unsigned char *priv,
440 size_t *len))
441 {
442 ameth->get_priv_key = get_priv_key;
443 }
444
EVP_PKEY_asn1_set_get_pub_key(EVP_PKEY_ASN1_METHOD * ameth,int (* get_pub_key)(const EVP_PKEY * pk,unsigned char * pub,size_t * len))445 void EVP_PKEY_asn1_set_get_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
446 int (*get_pub_key) (const EVP_PKEY *pk,
447 unsigned char *pub,
448 size_t *len))
449 {
450 ameth->get_pub_key = get_pub_key;
451 }
452