]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright 2006-2016 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 <stdio.h> | |
11 | #include "internal/cryptlib.h" | |
12 | #include <openssl/asn1t.h> | |
13 | #include <openssl/x509.h> | |
14 | #include <openssl/bn.h> | |
15 | #include <openssl/cms.h> | |
16 | #include "internal/asn1_int.h" | |
17 | #include "internal/evp_int.h" | |
18 | #include "rsa_locl.h" | |
19 | ||
20 | #ifndef OPENSSL_NO_CMS | |
21 | static int rsa_cms_sign(CMS_SignerInfo *si); | |
22 | static int rsa_cms_verify(CMS_SignerInfo *si); | |
23 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri); | |
24 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri); | |
25 | #endif | |
26 | ||
27 | static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) | |
28 | { | |
29 | unsigned char *penc = NULL; | |
30 | int penclen; | |
31 | penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc); | |
32 | if (penclen <= 0) | |
33 | return 0; | |
34 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA), | |
35 | V_ASN1_NULL, NULL, penc, penclen)) | |
36 | return 1; | |
37 | ||
38 | OPENSSL_free(penc); | |
39 | return 0; | |
40 | } | |
41 | ||
42 | static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) | |
43 | { | |
44 | const unsigned char *p; | |
45 | int pklen; | |
46 | RSA *rsa = NULL; | |
47 | ||
48 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey)) | |
49 | return 0; | |
50 | if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) { | |
51 | RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB); | |
52 | return 0; | |
53 | } | |
54 | EVP_PKEY_assign_RSA(pkey, rsa); | |
55 | return 1; | |
56 | } | |
57 | ||
58 | static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
59 | { | |
60 | if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0 | |
61 | || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0) | |
62 | return 0; | |
63 | return 1; | |
64 | } | |
65 | ||
66 | static int old_rsa_priv_decode(EVP_PKEY *pkey, | |
67 | const unsigned char **pder, int derlen) | |
68 | { | |
69 | RSA *rsa; | |
70 | ||
71 | if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) { | |
72 | RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB); | |
73 | return 0; | |
74 | } | |
75 | EVP_PKEY_assign_RSA(pkey, rsa); | |
76 | return 1; | |
77 | } | |
78 | ||
79 | static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
80 | { | |
81 | return i2d_RSAPrivateKey(pkey->pkey.rsa, pder); | |
82 | } | |
83 | ||
84 | static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
85 | { | |
86 | unsigned char *rk = NULL; | |
87 | int rklen; | |
88 | rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk); | |
89 | ||
90 | if (rklen <= 0) { | |
91 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
92 | return 0; | |
93 | } | |
94 | ||
95 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0, | |
96 | V_ASN1_NULL, NULL, rk, rklen)) { | |
97 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
98 | return 0; | |
99 | } | |
100 | ||
101 | return 1; | |
102 | } | |
103 | ||
104 | static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) | |
105 | { | |
106 | const unsigned char *p; | |
107 | int pklen; | |
108 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8)) | |
109 | return 0; | |
110 | return old_rsa_priv_decode(pkey, &p, pklen); | |
111 | } | |
112 | ||
113 | static int int_rsa_size(const EVP_PKEY *pkey) | |
114 | { | |
115 | return RSA_size(pkey->pkey.rsa); | |
116 | } | |
117 | ||
118 | static int rsa_bits(const EVP_PKEY *pkey) | |
119 | { | |
120 | return BN_num_bits(pkey->pkey.rsa->n); | |
121 | } | |
122 | ||
123 | static int rsa_security_bits(const EVP_PKEY *pkey) | |
124 | { | |
125 | return RSA_security_bits(pkey->pkey.rsa); | |
126 | } | |
127 | ||
128 | static void int_rsa_free(EVP_PKEY *pkey) | |
129 | { | |
130 | RSA_free(pkey->pkey.rsa); | |
131 | } | |
132 | ||
133 | static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv) | |
134 | { | |
135 | char *str; | |
136 | const char *s; | |
137 | int ret = 0, mod_len = 0; | |
138 | ||
139 | if (x->n != NULL) | |
140 | mod_len = BN_num_bits(x->n); | |
141 | ||
142 | if (!BIO_indent(bp, off, 128)) | |
143 | goto err; | |
144 | ||
145 | if (priv && x->d) { | |
146 | if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0) | |
147 | goto err; | |
148 | str = "modulus:"; | |
149 | s = "publicExponent:"; | |
150 | } else { | |
151 | if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0) | |
152 | goto err; | |
153 | str = "Modulus:"; | |
154 | s = "Exponent:"; | |
155 | } | |
156 | if (!ASN1_bn_print(bp, str, x->n, NULL, off)) | |
157 | goto err; | |
158 | if (!ASN1_bn_print(bp, s, x->e, NULL, off)) | |
159 | goto err; | |
160 | if (priv) { | |
161 | if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off)) | |
162 | goto err; | |
163 | if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off)) | |
164 | goto err; | |
165 | if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off)) | |
166 | goto err; | |
167 | if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off)) | |
168 | goto err; | |
169 | if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off)) | |
170 | goto err; | |
171 | if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off)) | |
172 | goto err; | |
173 | } | |
174 | ret = 1; | |
175 | err: | |
176 | return (ret); | |
177 | } | |
178 | ||
179 | static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
180 | ASN1_PCTX *ctx) | |
181 | { | |
182 | return do_rsa_print(bp, pkey->pkey.rsa, indent, 0); | |
183 | } | |
184 | ||
185 | static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
186 | ASN1_PCTX *ctx) | |
187 | { | |
188 | return do_rsa_print(bp, pkey->pkey.rsa, indent, 1); | |
189 | } | |
190 | ||
191 | /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */ | |
192 | static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg) | |
193 | { | |
194 | if (alg == NULL) | |
195 | return NULL; | |
196 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) | |
197 | return NULL; | |
198 | return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR), | |
199 | alg->parameter); | |
200 | } | |
201 | ||
202 | static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg, | |
203 | X509_ALGOR **pmaskHash) | |
204 | { | |
205 | RSA_PSS_PARAMS *pss; | |
206 | ||
207 | *pmaskHash = NULL; | |
208 | ||
209 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS), | |
210 | alg->parameter); | |
211 | ||
212 | if (!pss) | |
213 | return NULL; | |
214 | ||
215 | *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); | |
216 | ||
217 | return pss; | |
218 | } | |
219 | ||
220 | static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, | |
221 | X509_ALGOR *maskHash, int indent) | |
222 | { | |
223 | int rv = 0; | |
224 | if (!pss) { | |
225 | if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0) | |
226 | return 0; | |
227 | return 1; | |
228 | } | |
229 | if (BIO_puts(bp, "\n") <= 0) | |
230 | goto err; | |
231 | if (!BIO_indent(bp, indent, 128)) | |
232 | goto err; | |
233 | if (BIO_puts(bp, "Hash Algorithm: ") <= 0) | |
234 | goto err; | |
235 | ||
236 | if (pss->hashAlgorithm) { | |
237 | if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0) | |
238 | goto err; | |
239 | } else if (BIO_puts(bp, "sha1 (default)") <= 0) | |
240 | goto err; | |
241 | ||
242 | if (BIO_puts(bp, "\n") <= 0) | |
243 | goto err; | |
244 | ||
245 | if (!BIO_indent(bp, indent, 128)) | |
246 | goto err; | |
247 | ||
248 | if (BIO_puts(bp, "Mask Algorithm: ") <= 0) | |
249 | goto err; | |
250 | if (pss->maskGenAlgorithm) { | |
251 | if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0) | |
252 | goto err; | |
253 | if (BIO_puts(bp, " with ") <= 0) | |
254 | goto err; | |
255 | if (maskHash) { | |
256 | if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0) | |
257 | goto err; | |
258 | } else if (BIO_puts(bp, "INVALID") <= 0) | |
259 | goto err; | |
260 | } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) | |
261 | goto err; | |
262 | BIO_puts(bp, "\n"); | |
263 | ||
264 | if (!BIO_indent(bp, indent, 128)) | |
265 | goto err; | |
266 | if (BIO_puts(bp, "Salt Length: 0x") <= 0) | |
267 | goto err; | |
268 | if (pss->saltLength) { | |
269 | if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0) | |
270 | goto err; | |
271 | } else if (BIO_puts(bp, "14 (default)") <= 0) | |
272 | goto err; | |
273 | BIO_puts(bp, "\n"); | |
274 | ||
275 | if (!BIO_indent(bp, indent, 128)) | |
276 | goto err; | |
277 | if (BIO_puts(bp, "Trailer Field: 0x") <= 0) | |
278 | goto err; | |
279 | if (pss->trailerField) { | |
280 | if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0) | |
281 | goto err; | |
282 | } else if (BIO_puts(bp, "BC (default)") <= 0) | |
283 | goto err; | |
284 | BIO_puts(bp, "\n"); | |
285 | ||
286 | rv = 1; | |
287 | ||
288 | err: | |
289 | return rv; | |
290 | ||
291 | } | |
292 | ||
293 | static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, | |
294 | const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) | |
295 | { | |
296 | if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) { | |
297 | int rv; | |
298 | RSA_PSS_PARAMS *pss; | |
299 | X509_ALGOR *maskHash; | |
300 | pss = rsa_pss_decode(sigalg, &maskHash); | |
301 | rv = rsa_pss_param_print(bp, pss, maskHash, indent); | |
302 | RSA_PSS_PARAMS_free(pss); | |
303 | X509_ALGOR_free(maskHash); | |
304 | if (!rv) | |
305 | return 0; | |
306 | } else if (!sig && BIO_puts(bp, "\n") <= 0) | |
307 | return 0; | |
308 | if (sig) | |
309 | return X509_signature_dump(bp, sig, indent); | |
310 | return 1; | |
311 | } | |
312 | ||
313 | static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
314 | { | |
315 | X509_ALGOR *alg = NULL; | |
316 | switch (op) { | |
317 | ||
318 | case ASN1_PKEY_CTRL_PKCS7_SIGN: | |
319 | if (arg1 == 0) | |
320 | PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg); | |
321 | break; | |
322 | ||
323 | case ASN1_PKEY_CTRL_PKCS7_ENCRYPT: | |
324 | if (arg1 == 0) | |
325 | PKCS7_RECIP_INFO_get0_alg(arg2, &alg); | |
326 | break; | |
327 | #ifndef OPENSSL_NO_CMS | |
328 | case ASN1_PKEY_CTRL_CMS_SIGN: | |
329 | if (arg1 == 0) | |
330 | return rsa_cms_sign(arg2); | |
331 | else if (arg1 == 1) | |
332 | return rsa_cms_verify(arg2); | |
333 | break; | |
334 | ||
335 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: | |
336 | if (arg1 == 0) | |
337 | return rsa_cms_encrypt(arg2); | |
338 | else if (arg1 == 1) | |
339 | return rsa_cms_decrypt(arg2); | |
340 | break; | |
341 | ||
342 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: | |
343 | *(int *)arg2 = CMS_RECIPINFO_TRANS; | |
344 | return 1; | |
345 | #endif | |
346 | ||
347 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: | |
348 | *(int *)arg2 = NID_sha256; | |
349 | return 1; | |
350 | ||
351 | default: | |
352 | return -2; | |
353 | ||
354 | } | |
355 | ||
356 | if (alg) | |
357 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
358 | ||
359 | return 1; | |
360 | ||
361 | } | |
362 | ||
363 | /* allocate and set algorithm ID from EVP_MD, default SHA1 */ | |
364 | static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md) | |
365 | { | |
366 | if (EVP_MD_type(md) == NID_sha1) | |
367 | return 1; | |
368 | *palg = X509_ALGOR_new(); | |
369 | if (*palg == NULL) | |
370 | return 0; | |
371 | X509_ALGOR_set_md(*palg, md); | |
372 | return 1; | |
373 | } | |
374 | ||
375 | /* Allocate and set MGF1 algorithm ID from EVP_MD */ | |
376 | static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md) | |
377 | { | |
378 | X509_ALGOR *algtmp = NULL; | |
379 | ASN1_STRING *stmp = NULL; | |
380 | *palg = NULL; | |
381 | if (EVP_MD_type(mgf1md) == NID_sha1) | |
382 | return 1; | |
383 | /* need to embed algorithm ID inside another */ | |
384 | if (!rsa_md_to_algor(&algtmp, mgf1md)) | |
385 | goto err; | |
386 | if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp)) | |
387 | goto err; | |
388 | *palg = X509_ALGOR_new(); | |
389 | if (*palg == NULL) | |
390 | goto err; | |
391 | X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp); | |
392 | stmp = NULL; | |
393 | err: | |
394 | ASN1_STRING_free(stmp); | |
395 | X509_ALGOR_free(algtmp); | |
396 | if (*palg) | |
397 | return 1; | |
398 | return 0; | |
399 | } | |
400 | ||
401 | /* convert algorithm ID to EVP_MD, default SHA1 */ | |
402 | static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg) | |
403 | { | |
404 | const EVP_MD *md; | |
405 | if (!alg) | |
406 | return EVP_sha1(); | |
407 | md = EVP_get_digestbyobj(alg->algorithm); | |
408 | if (md == NULL) | |
409 | RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST); | |
410 | return md; | |
411 | } | |
412 | ||
413 | /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */ | |
414 | static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash) | |
415 | { | |
416 | const EVP_MD *md; | |
417 | if (!alg) | |
418 | return EVP_sha1(); | |
419 | /* Check mask and lookup mask hash algorithm */ | |
420 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) { | |
421 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM); | |
422 | return NULL; | |
423 | } | |
424 | if (!maskHash) { | |
425 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER); | |
426 | return NULL; | |
427 | } | |
428 | md = EVP_get_digestbyobj(maskHash->algorithm); | |
429 | if (md == NULL) { | |
430 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST); | |
431 | return NULL; | |
432 | } | |
433 | return md; | |
434 | } | |
435 | ||
436 | /* | |
437 | * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter, | |
438 | * suitable for setting an AlgorithmIdentifier. | |
439 | */ | |
440 | ||
441 | static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx) | |
442 | { | |
443 | const EVP_MD *sigmd, *mgf1md; | |
444 | RSA_PSS_PARAMS *pss = NULL; | |
445 | ASN1_STRING *os = NULL; | |
446 | EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); | |
447 | int saltlen, rv = 0; | |
448 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0) | |
449 | goto err; | |
450 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) | |
451 | goto err; | |
452 | if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) | |
453 | goto err; | |
454 | if (saltlen == -1) | |
455 | saltlen = EVP_MD_size(sigmd); | |
456 | else if (saltlen == -2) { | |
457 | saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; | |
458 | if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) | |
459 | saltlen--; | |
460 | } | |
461 | pss = RSA_PSS_PARAMS_new(); | |
462 | if (pss == NULL) | |
463 | goto err; | |
464 | if (saltlen != 20) { | |
465 | pss->saltLength = ASN1_INTEGER_new(); | |
466 | if (pss->saltLength == NULL) | |
467 | goto err; | |
468 | if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) | |
469 | goto err; | |
470 | } | |
471 | if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd)) | |
472 | goto err; | |
473 | if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md)) | |
474 | goto err; | |
475 | /* Finally create string with pss parameter encoding. */ | |
476 | if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) | |
477 | goto err; | |
478 | rv = 1; | |
479 | err: | |
480 | RSA_PSS_PARAMS_free(pss); | |
481 | if (rv) | |
482 | return os; | |
483 | ASN1_STRING_free(os); | |
484 | return NULL; | |
485 | } | |
486 | ||
487 | /* | |
488 | * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL | |
489 | * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are | |
490 | * passed to pkctx instead. | |
491 | */ | |
492 | ||
493 | static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx, | |
494 | X509_ALGOR *sigalg, EVP_PKEY *pkey) | |
495 | { | |
496 | int rv = -1; | |
497 | int saltlen; | |
498 | const EVP_MD *mgf1md = NULL, *md = NULL; | |
499 | RSA_PSS_PARAMS *pss; | |
500 | X509_ALGOR *maskHash; | |
501 | /* Sanity check: make sure it is PSS */ | |
502 | if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { | |
503 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); | |
504 | return -1; | |
505 | } | |
506 | /* Decode PSS parameters */ | |
507 | pss = rsa_pss_decode(sigalg, &maskHash); | |
508 | ||
509 | if (pss == NULL) { | |
510 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS); | |
511 | goto err; | |
512 | } | |
513 | mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash); | |
514 | if (!mgf1md) | |
515 | goto err; | |
516 | md = rsa_algor_to_md(pss->hashAlgorithm); | |
517 | if (!md) | |
518 | goto err; | |
519 | ||
520 | if (pss->saltLength) { | |
521 | saltlen = ASN1_INTEGER_get(pss->saltLength); | |
522 | ||
523 | /* | |
524 | * Could perform more salt length sanity checks but the main RSA | |
525 | * routines will trap other invalid values anyway. | |
526 | */ | |
527 | if (saltlen < 0) { | |
528 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH); | |
529 | goto err; | |
530 | } | |
531 | } else | |
532 | saltlen = 20; | |
533 | ||
534 | /* | |
535 | * low-level routines support only trailer field 0xbc (value 1) and | |
536 | * PKCS#1 says we should reject any other value anyway. | |
537 | */ | |
538 | if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) { | |
539 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER); | |
540 | goto err; | |
541 | } | |
542 | ||
543 | /* We have all parameters now set up context */ | |
544 | ||
545 | if (pkey) { | |
546 | if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey)) | |
547 | goto err; | |
548 | } else { | |
549 | const EVP_MD *checkmd; | |
550 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0) | |
551 | goto err; | |
552 | if (EVP_MD_type(md) != EVP_MD_type(checkmd)) { | |
553 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH); | |
554 | goto err; | |
555 | } | |
556 | } | |
557 | ||
558 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0) | |
559 | goto err; | |
560 | ||
561 | if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0) | |
562 | goto err; | |
563 | ||
564 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) | |
565 | goto err; | |
566 | /* Carry on */ | |
567 | rv = 1; | |
568 | ||
569 | err: | |
570 | RSA_PSS_PARAMS_free(pss); | |
571 | X509_ALGOR_free(maskHash); | |
572 | return rv; | |
573 | } | |
574 | ||
575 | #ifndef OPENSSL_NO_CMS | |
576 | static int rsa_cms_verify(CMS_SignerInfo *si) | |
577 | { | |
578 | int nid, nid2; | |
579 | X509_ALGOR *alg; | |
580 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si); | |
581 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg); | |
582 | nid = OBJ_obj2nid(alg->algorithm); | |
583 | if (nid == NID_rsaEncryption) | |
584 | return 1; | |
585 | if (nid == NID_rsassaPss) | |
586 | return rsa_pss_to_ctx(NULL, pkctx, alg, NULL); | |
587 | /* Workaround for some implementation that use a signature OID */ | |
588 | if (OBJ_find_sigid_algs(nid, NULL, &nid2)) { | |
589 | if (nid2 == NID_rsaEncryption) | |
590 | return 1; | |
591 | } | |
592 | return 0; | |
593 | } | |
594 | #endif | |
595 | ||
596 | /* | |
597 | * Customised RSA item verification routine. This is called when a signature | |
598 | * is encountered requiring special handling. We currently only handle PSS. | |
599 | */ | |
600 | ||
601 | static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, | |
602 | X509_ALGOR *sigalg, ASN1_BIT_STRING *sig, | |
603 | EVP_PKEY *pkey) | |
604 | { | |
605 | /* Sanity check: make sure it is PSS */ | |
606 | if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { | |
607 | RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); | |
608 | return -1; | |
609 | } | |
610 | if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) { | |
611 | /* Carry on */ | |
612 | return 2; | |
613 | } | |
614 | return -1; | |
615 | } | |
616 | ||
617 | #ifndef OPENSSL_NO_CMS | |
618 | static int rsa_cms_sign(CMS_SignerInfo *si) | |
619 | { | |
620 | int pad_mode = RSA_PKCS1_PADDING; | |
621 | X509_ALGOR *alg; | |
622 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si); | |
623 | ASN1_STRING *os = NULL; | |
624 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg); | |
625 | if (pkctx) { | |
626 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
627 | return 0; | |
628 | } | |
629 | if (pad_mode == RSA_PKCS1_PADDING) { | |
630 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
631 | return 1; | |
632 | } | |
633 | /* We don't support it */ | |
634 | if (pad_mode != RSA_PKCS1_PSS_PADDING) | |
635 | return 0; | |
636 | os = rsa_ctx_to_pss(pkctx); | |
637 | if (!os) | |
638 | return 0; | |
639 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os); | |
640 | return 1; | |
641 | } | |
642 | #endif | |
643 | ||
644 | static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, | |
645 | X509_ALGOR *alg1, X509_ALGOR *alg2, | |
646 | ASN1_BIT_STRING *sig) | |
647 | { | |
648 | int pad_mode; | |
649 | EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx); | |
650 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
651 | return 0; | |
652 | if (pad_mode == RSA_PKCS1_PADDING) | |
653 | return 2; | |
654 | if (pad_mode == RSA_PKCS1_PSS_PADDING) { | |
655 | ASN1_STRING *os1 = NULL; | |
656 | os1 = rsa_ctx_to_pss(pkctx); | |
657 | if (!os1) | |
658 | return 0; | |
659 | /* Duplicate parameters if we have to */ | |
660 | if (alg2) { | |
661 | ASN1_STRING *os2 = ASN1_STRING_dup(os1); | |
662 | if (!os2) { | |
663 | ASN1_STRING_free(os1); | |
664 | return 0; | |
665 | } | |
666 | X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss), | |
667 | V_ASN1_SEQUENCE, os2); | |
668 | } | |
669 | X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss), | |
670 | V_ASN1_SEQUENCE, os1); | |
671 | return 3; | |
672 | } | |
673 | return 2; | |
674 | } | |
675 | ||
676 | #ifndef OPENSSL_NO_CMS | |
677 | static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg, | |
678 | X509_ALGOR **pmaskHash) | |
679 | { | |
680 | RSA_OAEP_PARAMS *pss; | |
681 | ||
682 | *pmaskHash = NULL; | |
683 | ||
684 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS), | |
685 | alg->parameter); | |
686 | ||
687 | if (!pss) | |
688 | return NULL; | |
689 | ||
690 | *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc); | |
691 | ||
692 | return pss; | |
693 | } | |
694 | ||
695 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri) | |
696 | { | |
697 | EVP_PKEY_CTX *pkctx; | |
698 | X509_ALGOR *cmsalg; | |
699 | int nid; | |
700 | int rv = -1; | |
701 | unsigned char *label = NULL; | |
702 | int labellen = 0; | |
703 | const EVP_MD *mgf1md = NULL, *md = NULL; | |
704 | RSA_OAEP_PARAMS *oaep; | |
705 | X509_ALGOR *maskHash; | |
706 | pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
707 | if (!pkctx) | |
708 | return 0; | |
709 | if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg)) | |
710 | return -1; | |
711 | nid = OBJ_obj2nid(cmsalg->algorithm); | |
712 | if (nid == NID_rsaEncryption) | |
713 | return 1; | |
714 | if (nid != NID_rsaesOaep) { | |
715 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE); | |
716 | return -1; | |
717 | } | |
718 | /* Decode OAEP parameters */ | |
719 | oaep = rsa_oaep_decode(cmsalg, &maskHash); | |
720 | ||
721 | if (oaep == NULL) { | |
722 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS); | |
723 | goto err; | |
724 | } | |
725 | ||
726 | mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash); | |
727 | if (!mgf1md) | |
728 | goto err; | |
729 | md = rsa_algor_to_md(oaep->hashFunc); | |
730 | if (!md) | |
731 | goto err; | |
732 | ||
733 | if (oaep->pSourceFunc) { | |
734 | X509_ALGOR *plab = oaep->pSourceFunc; | |
735 | if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) { | |
736 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE); | |
737 | goto err; | |
738 | } | |
739 | if (plab->parameter->type != V_ASN1_OCTET_STRING) { | |
740 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL); | |
741 | goto err; | |
742 | } | |
743 | ||
744 | label = plab->parameter->value.octet_string->data; | |
745 | /* Stop label being freed when OAEP parameters are freed */ | |
746 | plab->parameter->value.octet_string->data = NULL; | |
747 | labellen = plab->parameter->value.octet_string->length; | |
748 | } | |
749 | ||
750 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0) | |
751 | goto err; | |
752 | if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0) | |
753 | goto err; | |
754 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) | |
755 | goto err; | |
756 | if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0) | |
757 | goto err; | |
758 | /* Carry on */ | |
759 | rv = 1; | |
760 | ||
761 | err: | |
762 | RSA_OAEP_PARAMS_free(oaep); | |
763 | X509_ALGOR_free(maskHash); | |
764 | return rv; | |
765 | } | |
766 | ||
767 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri) | |
768 | { | |
769 | const EVP_MD *md, *mgf1md; | |
770 | RSA_OAEP_PARAMS *oaep = NULL; | |
771 | ASN1_STRING *os = NULL; | |
772 | X509_ALGOR *alg; | |
773 | EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
774 | int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen; | |
775 | unsigned char *label; | |
776 | CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg); | |
777 | if (pkctx) { | |
778 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
779 | return 0; | |
780 | } | |
781 | if (pad_mode == RSA_PKCS1_PADDING) { | |
782 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
783 | return 1; | |
784 | } | |
785 | /* Not supported */ | |
786 | if (pad_mode != RSA_PKCS1_OAEP_PADDING) | |
787 | return 0; | |
788 | if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0) | |
789 | goto err; | |
790 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) | |
791 | goto err; | |
792 | labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label); | |
793 | if (labellen < 0) | |
794 | goto err; | |
795 | oaep = RSA_OAEP_PARAMS_new(); | |
796 | if (oaep == NULL) | |
797 | goto err; | |
798 | if (!rsa_md_to_algor(&oaep->hashFunc, md)) | |
799 | goto err; | |
800 | if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md)) | |
801 | goto err; | |
802 | if (labellen > 0) { | |
803 | ASN1_OCTET_STRING *los; | |
804 | oaep->pSourceFunc = X509_ALGOR_new(); | |
805 | if (oaep->pSourceFunc == NULL) | |
806 | goto err; | |
807 | los = ASN1_OCTET_STRING_new(); | |
808 | if (los == NULL) | |
809 | goto err; | |
810 | if (!ASN1_OCTET_STRING_set(los, label, labellen)) { | |
811 | ASN1_OCTET_STRING_free(los); | |
812 | goto err; | |
813 | } | |
814 | X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified), | |
815 | V_ASN1_OCTET_STRING, los); | |
816 | } | |
817 | /* create string with pss parameter encoding. */ | |
818 | if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os)) | |
819 | goto err; | |
820 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os); | |
821 | os = NULL; | |
822 | rv = 1; | |
823 | err: | |
824 | RSA_OAEP_PARAMS_free(oaep); | |
825 | ASN1_STRING_free(os); | |
826 | return rv; | |
827 | } | |
828 | #endif | |
829 | ||
830 | const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = { | |
831 | { | |
832 | EVP_PKEY_RSA, | |
833 | EVP_PKEY_RSA, | |
834 | ASN1_PKEY_SIGPARAM_NULL, | |
835 | ||
836 | "RSA", | |
837 | "OpenSSL RSA method", | |
838 | ||
839 | rsa_pub_decode, | |
840 | rsa_pub_encode, | |
841 | rsa_pub_cmp, | |
842 | rsa_pub_print, | |
843 | ||
844 | rsa_priv_decode, | |
845 | rsa_priv_encode, | |
846 | rsa_priv_print, | |
847 | ||
848 | int_rsa_size, | |
849 | rsa_bits, | |
850 | rsa_security_bits, | |
851 | ||
852 | 0, 0, 0, 0, 0, 0, | |
853 | ||
854 | rsa_sig_print, | |
855 | int_rsa_free, | |
856 | rsa_pkey_ctrl, | |
857 | old_rsa_priv_decode, | |
858 | old_rsa_priv_encode, | |
859 | rsa_item_verify, | |
860 | rsa_item_sign}, | |
861 | ||
862 | { | |
863 | EVP_PKEY_RSA2, | |
864 | EVP_PKEY_RSA, | |
865 | ASN1_PKEY_ALIAS} | |
866 | }; |