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Commit | Line | Data |
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09b88a4a | 1 | /* crypto/rsa/rsa_ameth.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
4 | * 2006. | |
448be743 DSH |
5 | */ |
6 | /* ==================================================================== | |
7 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
448be743 DSH |
15 | * |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in | |
18 | * the documentation and/or other materials provided with the | |
19 | * distribution. | |
20 | * | |
21 | * 3. All advertising materials mentioning features or use of this | |
22 | * software must display the following acknowledgment: | |
23 | * "This product includes software developed by the OpenSSL Project | |
24 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
25 | * | |
26 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
27 | * endorse or promote products derived from this software without | |
28 | * prior written permission. For written permission, please contact | |
29 | * licensing@OpenSSL.org. | |
30 | * | |
31 | * 5. Products derived from this software may not be called "OpenSSL" | |
32 | * nor may "OpenSSL" appear in their names without prior written | |
33 | * permission of the OpenSSL Project. | |
34 | * | |
35 | * 6. Redistributions of any form whatsoever must retain the following | |
36 | * acknowledgment: | |
37 | * "This product includes software developed by the OpenSSL Project | |
38 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
39 | * | |
40 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
41 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
44 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
49 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
50 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
51 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
52 | * ==================================================================== | |
53 | * | |
54 | * This product includes cryptographic software written by Eric Young | |
55 | * (eay@cryptsoft.com). This product includes software written by Tim | |
56 | * Hudson (tjh@cryptsoft.com). | |
57 | * | |
58 | */ | |
59 | ||
60 | #include <stdio.h> | |
61 | #include "cryptlib.h" | |
62 | #include <openssl/asn1t.h> | |
63 | #include <openssl/x509.h> | |
64 | #include <openssl/rsa.h> | |
1e26a8ba | 65 | #include <openssl/bn.h> |
8931b30d | 66 | #ifndef OPENSSL_NO_CMS |
0f113f3e | 67 | # include <openssl/cms.h> |
8931b30d | 68 | #endif |
5fe736e5 | 69 | #include "internal/asn1_int.h" |
448be743 | 70 | |
0574cadf DSH |
71 | static int rsa_cms_sign(CMS_SignerInfo *si); |
72 | static int rsa_cms_verify(CMS_SignerInfo *si); | |
73 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri); | |
74 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri); | |
75 | ||
6f81892e | 76 | static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
0f113f3e MC |
77 | { |
78 | unsigned char *penc = NULL; | |
79 | int penclen; | |
80 | penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc); | |
81 | if (penclen <= 0) | |
82 | return 0; | |
83 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA), | |
84 | V_ASN1_NULL, NULL, penc, penclen)) | |
85 | return 1; | |
86 | ||
87 | OPENSSL_free(penc); | |
88 | return 0; | |
89 | } | |
448be743 DSH |
90 | |
91 | static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) | |
0f113f3e MC |
92 | { |
93 | const unsigned char *p; | |
94 | int pklen; | |
95 | RSA *rsa = NULL; | |
96 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey)) | |
97 | return 0; | |
98 | if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen))) { | |
99 | RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB); | |
100 | return 0; | |
101 | } | |
102 | EVP_PKEY_assign_RSA(pkey, rsa); | |
103 | return 1; | |
104 | } | |
448be743 | 105 | |
6f81892e | 106 | static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
107 | { |
108 | if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0 | |
109 | || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0) | |
110 | return 0; | |
111 | return 1; | |
112 | } | |
6f81892e | 113 | |
e4263314 | 114 | static int old_rsa_priv_decode(EVP_PKEY *pkey, |
0f113f3e MC |
115 | const unsigned char **pder, int derlen) |
116 | { | |
117 | RSA *rsa; | |
118 | if (!(rsa = d2i_RSAPrivateKey(NULL, pder, derlen))) { | |
119 | RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB); | |
120 | return 0; | |
121 | } | |
122 | EVP_PKEY_assign_RSA(pkey, rsa); | |
123 | return 1; | |
124 | } | |
448be743 | 125 | |
e4263314 | 126 | static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) |
0f113f3e MC |
127 | { |
128 | return i2d_RSAPrivateKey(pkey->pkey.rsa, pder); | |
129 | } | |
e4263314 | 130 | |
6f81892e | 131 | static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) |
0f113f3e MC |
132 | { |
133 | unsigned char *rk = NULL; | |
134 | int rklen; | |
135 | rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk); | |
136 | ||
137 | if (rklen <= 0) { | |
138 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0, | |
143 | V_ASN1_NULL, NULL, rk, rklen)) { | |
144 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
145 | return 0; | |
146 | } | |
147 | ||
148 | return 1; | |
149 | } | |
448be743 | 150 | |
e4263314 | 151 | static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
152 | { |
153 | const unsigned char *p; | |
154 | int pklen; | |
155 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8)) | |
156 | return 0; | |
157 | return old_rsa_priv_decode(pkey, &p, pklen); | |
158 | } | |
e4263314 | 159 | |
6f81892e | 160 | static int int_rsa_size(const EVP_PKEY *pkey) |
0f113f3e MC |
161 | { |
162 | return RSA_size(pkey->pkey.rsa); | |
163 | } | |
6f81892e DSH |
164 | |
165 | static int rsa_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
166 | { |
167 | return BN_num_bits(pkey->pkey.rsa->n); | |
168 | } | |
6f81892e | 169 | |
2514fa79 | 170 | static int rsa_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
171 | { |
172 | return RSA_security_bits(pkey->pkey.rsa); | |
173 | } | |
2514fa79 | 174 | |
6f81892e | 175 | static void int_rsa_free(EVP_PKEY *pkey) |
0f113f3e MC |
176 | { |
177 | RSA_free(pkey->pkey.rsa); | |
178 | } | |
35208f36 DSH |
179 | |
180 | static void update_buflen(const BIGNUM *b, size_t *pbuflen) | |
0f113f3e MC |
181 | { |
182 | size_t i; | |
183 | if (!b) | |
184 | return; | |
185 | if (*pbuflen < (i = (size_t)BN_num_bytes(b))) | |
186 | *pbuflen = i; | |
187 | } | |
35208f36 DSH |
188 | |
189 | static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv) | |
0f113f3e MC |
190 | { |
191 | char *str; | |
192 | const char *s; | |
193 | unsigned char *m = NULL; | |
194 | int ret = 0, mod_len = 0; | |
195 | size_t buf_len = 0; | |
196 | ||
197 | update_buflen(x->n, &buf_len); | |
198 | update_buflen(x->e, &buf_len); | |
199 | ||
200 | if (priv) { | |
201 | update_buflen(x->d, &buf_len); | |
202 | update_buflen(x->p, &buf_len); | |
203 | update_buflen(x->q, &buf_len); | |
204 | update_buflen(x->dmp1, &buf_len); | |
205 | update_buflen(x->dmq1, &buf_len); | |
206 | update_buflen(x->iqmp, &buf_len); | |
207 | } | |
208 | ||
209 | m = (unsigned char *)OPENSSL_malloc(buf_len + 10); | |
210 | if (m == NULL) { | |
211 | RSAerr(RSA_F_DO_RSA_PRINT, ERR_R_MALLOC_FAILURE); | |
212 | goto err; | |
213 | } | |
214 | ||
215 | if (x->n != NULL) | |
216 | mod_len = BN_num_bits(x->n); | |
217 | ||
218 | if (!BIO_indent(bp, off, 128)) | |
219 | goto err; | |
220 | ||
221 | if (priv && x->d) { | |
222 | if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) | |
223 | <= 0) | |
224 | goto err; | |
225 | str = "modulus:"; | |
226 | s = "publicExponent:"; | |
227 | } else { | |
228 | if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) | |
229 | <= 0) | |
230 | goto err; | |
231 | str = "Modulus:"; | |
232 | s = "Exponent:"; | |
233 | } | |
234 | if (!ASN1_bn_print(bp, str, x->n, m, off)) | |
235 | goto err; | |
236 | if (!ASN1_bn_print(bp, s, x->e, m, off)) | |
237 | goto err; | |
238 | if (priv) { | |
239 | if (!ASN1_bn_print(bp, "privateExponent:", x->d, m, off)) | |
240 | goto err; | |
241 | if (!ASN1_bn_print(bp, "prime1:", x->p, m, off)) | |
242 | goto err; | |
243 | if (!ASN1_bn_print(bp, "prime2:", x->q, m, off)) | |
244 | goto err; | |
245 | if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, m, off)) | |
246 | goto err; | |
247 | if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, m, off)) | |
248 | goto err; | |
249 | if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, m, off)) | |
250 | goto err; | |
251 | } | |
252 | ret = 1; | |
253 | err: | |
254 | if (m != NULL) | |
255 | OPENSSL_free(m); | |
256 | return (ret); | |
257 | } | |
35208f36 DSH |
258 | |
259 | static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
260 | ASN1_PCTX *ctx) |
261 | { | |
262 | return do_rsa_print(bp, pkey->pkey.rsa, indent, 0); | |
263 | } | |
35208f36 DSH |
264 | |
265 | static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
266 | ASN1_PCTX *ctx) |
267 | { | |
268 | return do_rsa_print(bp, pkey->pkey.rsa, indent, 1); | |
269 | } | |
35208f36 | 270 | |
0574cadf DSH |
271 | /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */ |
272 | static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg) | |
0f113f3e | 273 | { |
0f113f3e MC |
274 | if (alg == NULL) |
275 | return NULL; | |
276 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) | |
277 | return NULL; | |
e93c8748 DSH |
278 | return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR), |
279 | alg->parameter); | |
0f113f3e | 280 | } |
0574cadf | 281 | |
63b825c9 | 282 | static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg, |
0f113f3e MC |
283 | X509_ALGOR **pmaskHash) |
284 | { | |
0f113f3e MC |
285 | RSA_PSS_PARAMS *pss; |
286 | ||
287 | *pmaskHash = NULL; | |
288 | ||
e93c8748 DSH |
289 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS), |
290 | alg->parameter); | |
0f113f3e MC |
291 | |
292 | if (!pss) | |
293 | return NULL; | |
294 | ||
295 | *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); | |
296 | ||
297 | return pss; | |
298 | } | |
299 | ||
300 | static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, | |
301 | X509_ALGOR *maskHash, int indent) | |
302 | { | |
303 | int rv = 0; | |
304 | if (!pss) { | |
305 | if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0) | |
306 | return 0; | |
307 | return 1; | |
308 | } | |
309 | if (BIO_puts(bp, "\n") <= 0) | |
310 | goto err; | |
311 | if (!BIO_indent(bp, indent, 128)) | |
312 | goto err; | |
313 | if (BIO_puts(bp, "Hash Algorithm: ") <= 0) | |
314 | goto err; | |
315 | ||
316 | if (pss->hashAlgorithm) { | |
317 | if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0) | |
318 | goto err; | |
319 | } else if (BIO_puts(bp, "sha1 (default)") <= 0) | |
320 | goto err; | |
321 | ||
322 | if (BIO_puts(bp, "\n") <= 0) | |
323 | goto err; | |
324 | ||
325 | if (!BIO_indent(bp, indent, 128)) | |
326 | goto err; | |
327 | ||
328 | if (BIO_puts(bp, "Mask Algorithm: ") <= 0) | |
329 | goto err; | |
330 | if (pss->maskGenAlgorithm) { | |
331 | if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0) | |
332 | goto err; | |
333 | if (BIO_puts(bp, " with ") <= 0) | |
334 | goto err; | |
335 | if (maskHash) { | |
336 | if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0) | |
337 | goto err; | |
338 | } else if (BIO_puts(bp, "INVALID") <= 0) | |
339 | goto err; | |
340 | } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) | |
341 | goto err; | |
342 | BIO_puts(bp, "\n"); | |
343 | ||
344 | if (!BIO_indent(bp, indent, 128)) | |
345 | goto err; | |
346 | if (BIO_puts(bp, "Salt Length: 0x") <= 0) | |
347 | goto err; | |
348 | if (pss->saltLength) { | |
349 | if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0) | |
350 | goto err; | |
351 | } else if (BIO_puts(bp, "14 (default)") <= 0) | |
352 | goto err; | |
353 | BIO_puts(bp, "\n"); | |
354 | ||
355 | if (!BIO_indent(bp, indent, 128)) | |
356 | goto err; | |
357 | if (BIO_puts(bp, "Trailer Field: 0x") <= 0) | |
358 | goto err; | |
359 | if (pss->trailerField) { | |
360 | if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0) | |
361 | goto err; | |
362 | } else if (BIO_puts(bp, "BC (default)") <= 0) | |
363 | goto err; | |
364 | BIO_puts(bp, "\n"); | |
365 | ||
366 | rv = 1; | |
367 | ||
368 | err: | |
369 | return rv; | |
370 | ||
371 | } | |
ff04bbe3 DSH |
372 | |
373 | static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, | |
0f113f3e MC |
374 | const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) |
375 | { | |
376 | if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) { | |
377 | int rv; | |
378 | RSA_PSS_PARAMS *pss; | |
379 | X509_ALGOR *maskHash; | |
380 | pss = rsa_pss_decode(sigalg, &maskHash); | |
381 | rv = rsa_pss_param_print(bp, pss, maskHash, indent); | |
382 | if (pss) | |
383 | RSA_PSS_PARAMS_free(pss); | |
384 | if (maskHash) | |
385 | X509_ALGOR_free(maskHash); | |
386 | if (!rv) | |
387 | return 0; | |
388 | } else if (!sig && BIO_puts(bp, "\n") <= 0) | |
389 | return 0; | |
390 | if (sig) | |
391 | return X509_signature_dump(bp, sig, indent); | |
392 | return 1; | |
393 | } | |
492a9e24 DSH |
394 | |
395 | static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
396 | { |
397 | X509_ALGOR *alg = NULL; | |
398 | switch (op) { | |
399 | ||
400 | case ASN1_PKEY_CTRL_PKCS7_SIGN: | |
401 | if (arg1 == 0) | |
402 | PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg); | |
403 | break; | |
404 | ||
405 | case ASN1_PKEY_CTRL_PKCS7_ENCRYPT: | |
406 | if (arg1 == 0) | |
407 | PKCS7_RECIP_INFO_get0_alg(arg2, &alg); | |
408 | break; | |
8931b30d | 409 | #ifndef OPENSSL_NO_CMS |
0f113f3e MC |
410 | case ASN1_PKEY_CTRL_CMS_SIGN: |
411 | if (arg1 == 0) | |
412 | return rsa_cms_sign(arg2); | |
413 | else if (arg1 == 1) | |
414 | return rsa_cms_verify(arg2); | |
415 | break; | |
416 | ||
417 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: | |
418 | if (arg1 == 0) | |
419 | return rsa_cms_encrypt(arg2); | |
420 | else if (arg1 == 1) | |
421 | return rsa_cms_decrypt(arg2); | |
422 | break; | |
423 | ||
424 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: | |
425 | *(int *)arg2 = CMS_RECIPINFO_TRANS; | |
426 | return 1; | |
8931b30d | 427 | #endif |
a78568b7 | 428 | |
0f113f3e MC |
429 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
430 | *(int *)arg2 = NID_sha256; | |
431 | return 1; | |
03919683 | 432 | |
0f113f3e MC |
433 | default: |
434 | return -2; | |
492a9e24 | 435 | |
0f113f3e | 436 | } |
492a9e24 | 437 | |
0f113f3e MC |
438 | if (alg) |
439 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
4f1aa191 | 440 | |
0f113f3e | 441 | return 1; |
4f1aa191 | 442 | |
0f113f3e | 443 | } |
492a9e24 | 444 | |
0574cadf DSH |
445 | /* allocate and set algorithm ID from EVP_MD, default SHA1 */ |
446 | static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md) | |
0f113f3e MC |
447 | { |
448 | if (EVP_MD_type(md) == NID_sha1) | |
449 | return 1; | |
450 | *palg = X509_ALGOR_new(); | |
451 | if (!*palg) | |
452 | return 0; | |
453 | X509_ALGOR_set_md(*palg, md); | |
454 | return 1; | |
455 | } | |
0574cadf DSH |
456 | |
457 | /* Allocate and set MGF1 algorithm ID from EVP_MD */ | |
458 | static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md) | |
0f113f3e MC |
459 | { |
460 | X509_ALGOR *algtmp = NULL; | |
461 | ASN1_STRING *stmp = NULL; | |
462 | *palg = NULL; | |
463 | if (EVP_MD_type(mgf1md) == NID_sha1) | |
464 | return 1; | |
465 | /* need to embed algorithm ID inside another */ | |
466 | if (!rsa_md_to_algor(&algtmp, mgf1md)) | |
467 | goto err; | |
468 | if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp)) | |
469 | goto err; | |
470 | *palg = X509_ALGOR_new(); | |
471 | if (!*palg) | |
472 | goto err; | |
473 | X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp); | |
474 | stmp = NULL; | |
475 | err: | |
0dfb9398 | 476 | ASN1_STRING_free(stmp); |
0f113f3e MC |
477 | if (algtmp) |
478 | X509_ALGOR_free(algtmp); | |
479 | if (*palg) | |
480 | return 1; | |
481 | return 0; | |
482 | } | |
0574cadf DSH |
483 | |
484 | /* convert algorithm ID to EVP_MD, default SHA1 */ | |
485 | static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg) | |
0f113f3e MC |
486 | { |
487 | const EVP_MD *md; | |
488 | if (!alg) | |
489 | return EVP_sha1(); | |
490 | md = EVP_get_digestbyobj(alg->algorithm); | |
491 | if (md == NULL) | |
492 | RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST); | |
493 | return md; | |
494 | } | |
495 | ||
0574cadf DSH |
496 | /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */ |
497 | static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash) | |
0f113f3e MC |
498 | { |
499 | const EVP_MD *md; | |
500 | if (!alg) | |
501 | return EVP_sha1(); | |
502 | /* Check mask and lookup mask hash algorithm */ | |
503 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) { | |
504 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM); | |
505 | return NULL; | |
506 | } | |
507 | if (!maskHash) { | |
508 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER); | |
509 | return NULL; | |
510 | } | |
511 | md = EVP_get_digestbyobj(maskHash->algorithm); | |
512 | if (md == NULL) { | |
513 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST); | |
514 | return NULL; | |
515 | } | |
516 | return md; | |
517 | } | |
518 | ||
519 | /* | |
520 | * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter, | |
0574cadf | 521 | * suitable for setting an AlgorithmIdentifier. |
31904ecd DSH |
522 | */ |
523 | ||
0574cadf | 524 | static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx) |
0f113f3e MC |
525 | { |
526 | const EVP_MD *sigmd, *mgf1md; | |
527 | RSA_PSS_PARAMS *pss = NULL; | |
528 | ASN1_STRING *os = NULL; | |
529 | EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); | |
530 | int saltlen, rv = 0; | |
531 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0) | |
532 | goto err; | |
533 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) | |
534 | goto err; | |
535 | if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) | |
536 | goto err; | |
537 | if (saltlen == -1) | |
538 | saltlen = EVP_MD_size(sigmd); | |
539 | else if (saltlen == -2) { | |
540 | saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; | |
541 | if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) | |
542 | saltlen--; | |
543 | } | |
544 | pss = RSA_PSS_PARAMS_new(); | |
545 | if (!pss) | |
546 | goto err; | |
547 | if (saltlen != 20) { | |
548 | pss->saltLength = ASN1_INTEGER_new(); | |
549 | if (!pss->saltLength) | |
550 | goto err; | |
551 | if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) | |
552 | goto err; | |
553 | } | |
554 | if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd)) | |
555 | goto err; | |
556 | if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md)) | |
557 | goto err; | |
558 | /* Finally create string with pss parameter encoding. */ | |
559 | if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) | |
560 | goto err; | |
561 | rv = 1; | |
562 | err: | |
563 | if (pss) | |
564 | RSA_PSS_PARAMS_free(pss); | |
565 | if (rv) | |
566 | return os; | |
0dfb9398 | 567 | ASN1_STRING_free(os); |
0f113f3e MC |
568 | return NULL; |
569 | } | |
570 | ||
571 | /* | |
572 | * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL | |
573 | * then the EVP_MD_CTX is setup and initalised. If it is NULL parameters are | |
574 | * passed to pkctx instead. | |
0574cadf | 575 | */ |
31904ecd | 576 | |
0574cadf | 577 | static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx, |
0f113f3e MC |
578 | X509_ALGOR *sigalg, EVP_PKEY *pkey) |
579 | { | |
580 | int rv = -1; | |
581 | int saltlen; | |
582 | const EVP_MD *mgf1md = NULL, *md = NULL; | |
583 | RSA_PSS_PARAMS *pss; | |
584 | X509_ALGOR *maskHash; | |
585 | /* Sanity check: make sure it is PSS */ | |
586 | if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { | |
587 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); | |
588 | return -1; | |
589 | } | |
590 | /* Decode PSS parameters */ | |
591 | pss = rsa_pss_decode(sigalg, &maskHash); | |
592 | ||
593 | if (pss == NULL) { | |
594 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS); | |
595 | goto err; | |
596 | } | |
597 | mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash); | |
598 | if (!mgf1md) | |
599 | goto err; | |
600 | md = rsa_algor_to_md(pss->hashAlgorithm); | |
601 | if (!md) | |
602 | goto err; | |
603 | ||
604 | if (pss->saltLength) { | |
605 | saltlen = ASN1_INTEGER_get(pss->saltLength); | |
606 | ||
607 | /* | |
608 | * Could perform more salt length sanity checks but the main RSA | |
609 | * routines will trap other invalid values anyway. | |
610 | */ | |
611 | if (saltlen < 0) { | |
612 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH); | |
613 | goto err; | |
614 | } | |
615 | } else | |
616 | saltlen = 20; | |
617 | ||
618 | /* | |
619 | * low-level routines support only trailer field 0xbc (value 1) and | |
620 | * PKCS#1 says we should reject any other value anyway. | |
621 | */ | |
622 | if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) { | |
623 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER); | |
624 | goto err; | |
625 | } | |
626 | ||
627 | /* We have all parameters now set up context */ | |
628 | ||
629 | if (pkey) { | |
630 | if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey)) | |
631 | goto err; | |
632 | } else { | |
633 | const EVP_MD *checkmd; | |
634 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0) | |
635 | goto err; | |
636 | if (EVP_MD_type(md) != EVP_MD_type(checkmd)) { | |
637 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH); | |
638 | goto err; | |
639 | } | |
640 | } | |
641 | ||
642 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0) | |
643 | goto err; | |
644 | ||
645 | if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0) | |
646 | goto err; | |
647 | ||
648 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) | |
649 | goto err; | |
650 | /* Carry on */ | |
651 | rv = 1; | |
652 | ||
653 | err: | |
654 | RSA_PSS_PARAMS_free(pss); | |
655 | if (maskHash) | |
656 | X509_ALGOR_free(maskHash); | |
657 | return rv; | |
658 | } | |
492a9e24 | 659 | |
0574cadf | 660 | static int rsa_cms_verify(CMS_SignerInfo *si) |
0f113f3e MC |
661 | { |
662 | int nid, nid2; | |
663 | X509_ALGOR *alg; | |
664 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si); | |
665 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg); | |
666 | nid = OBJ_obj2nid(alg->algorithm); | |
667 | if (nid == NID_rsaEncryption) | |
668 | return 1; | |
669 | if (nid == NID_rsassaPss) | |
670 | return rsa_pss_to_ctx(NULL, pkctx, alg, NULL); | |
671 | /* Workaround for some implementation that use a signature OID */ | |
672 | if (OBJ_find_sigid_algs(nid, NULL, &nid2)) { | |
673 | if (nid2 == NID_rsaEncryption) | |
674 | return 1; | |
675 | } | |
676 | return 0; | |
677 | } | |
678 | ||
679 | /* | |
680 | * Customised RSA item verification routine. This is called when a signature | |
681 | * is encountered requiring special handling. We currently only handle PSS. | |
0574cadf DSH |
682 | */ |
683 | ||
0574cadf | 684 | static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, |
0f113f3e MC |
685 | X509_ALGOR *sigalg, ASN1_BIT_STRING *sig, |
686 | EVP_PKEY *pkey) | |
687 | { | |
688 | /* Sanity check: make sure it is PSS */ | |
689 | if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { | |
690 | RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); | |
691 | return -1; | |
692 | } | |
09f06923 | 693 | if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) { |
0f113f3e MC |
694 | /* Carry on */ |
695 | return 2; | |
09f06923 | 696 | } |
0f113f3e MC |
697 | return -1; |
698 | } | |
0574cadf DSH |
699 | |
700 | static int rsa_cms_sign(CMS_SignerInfo *si) | |
0f113f3e MC |
701 | { |
702 | int pad_mode = RSA_PKCS1_PADDING; | |
703 | X509_ALGOR *alg; | |
704 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si); | |
705 | ASN1_STRING *os = NULL; | |
706 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg); | |
707 | if (pkctx) { | |
708 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
709 | return 0; | |
710 | } | |
711 | if (pad_mode == RSA_PKCS1_PADDING) { | |
712 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
713 | return 1; | |
714 | } | |
715 | /* We don't support it */ | |
716 | if (pad_mode != RSA_PKCS1_PSS_PADDING) | |
717 | return 0; | |
718 | os = rsa_ctx_to_pss(pkctx); | |
719 | if (!os) | |
720 | return 0; | |
721 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os); | |
722 | return 1; | |
723 | } | |
0574cadf | 724 | |
17c63d1c | 725 | static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, |
0f113f3e MC |
726 | X509_ALGOR *alg1, X509_ALGOR *alg2, |
727 | ASN1_BIT_STRING *sig) | |
728 | { | |
729 | int pad_mode; | |
730 | EVP_PKEY_CTX *pkctx = ctx->pctx; | |
731 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
732 | return 0; | |
733 | if (pad_mode == RSA_PKCS1_PADDING) | |
734 | return 2; | |
735 | if (pad_mode == RSA_PKCS1_PSS_PADDING) { | |
736 | ASN1_STRING *os1 = NULL; | |
737 | os1 = rsa_ctx_to_pss(pkctx); | |
738 | if (!os1) | |
739 | return 0; | |
740 | /* Duplicate parameters if we have to */ | |
741 | if (alg2) { | |
742 | ASN1_STRING *os2 = ASN1_STRING_dup(os1); | |
743 | if (!os2) { | |
744 | ASN1_STRING_free(os1); | |
745 | return 0; | |
746 | } | |
747 | X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss), | |
748 | V_ASN1_SEQUENCE, os2); | |
749 | } | |
750 | X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss), | |
751 | V_ASN1_SEQUENCE, os1); | |
752 | return 3; | |
753 | } | |
754 | return 2; | |
755 | } | |
17c63d1c | 756 | |
0574cadf | 757 | static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg, |
0f113f3e MC |
758 | X509_ALGOR **pmaskHash) |
759 | { | |
0f113f3e | 760 | RSA_OAEP_PARAMS *pss; |
0574cadf | 761 | |
0f113f3e | 762 | *pmaskHash = NULL; |
0574cadf | 763 | |
e93c8748 DSH |
764 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS), |
765 | alg->parameter); | |
0574cadf | 766 | |
0f113f3e MC |
767 | if (!pss) |
768 | return NULL; | |
0574cadf | 769 | |
0f113f3e | 770 | *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc); |
0574cadf | 771 | |
0f113f3e MC |
772 | return pss; |
773 | } | |
0574cadf DSH |
774 | |
775 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
776 | { |
777 | EVP_PKEY_CTX *pkctx; | |
778 | X509_ALGOR *cmsalg; | |
779 | int nid; | |
780 | int rv = -1; | |
781 | unsigned char *label = NULL; | |
782 | int labellen = 0; | |
783 | const EVP_MD *mgf1md = NULL, *md = NULL; | |
784 | RSA_OAEP_PARAMS *oaep; | |
785 | X509_ALGOR *maskHash; | |
786 | pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
787 | if (!pkctx) | |
788 | return 0; | |
789 | if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg)) | |
790 | return -1; | |
791 | nid = OBJ_obj2nid(cmsalg->algorithm); | |
792 | if (nid == NID_rsaEncryption) | |
793 | return 1; | |
794 | if (nid != NID_rsaesOaep) { | |
795 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE); | |
796 | return -1; | |
797 | } | |
798 | /* Decode OAEP parameters */ | |
799 | oaep = rsa_oaep_decode(cmsalg, &maskHash); | |
800 | ||
801 | if (oaep == NULL) { | |
802 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS); | |
803 | goto err; | |
804 | } | |
805 | ||
806 | mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash); | |
807 | if (!mgf1md) | |
808 | goto err; | |
809 | md = rsa_algor_to_md(oaep->hashFunc); | |
810 | if (!md) | |
811 | goto err; | |
812 | ||
813 | if (oaep->pSourceFunc) { | |
814 | X509_ALGOR *plab = oaep->pSourceFunc; | |
815 | if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) { | |
816 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE); | |
817 | goto err; | |
818 | } | |
819 | if (plab->parameter->type != V_ASN1_OCTET_STRING) { | |
820 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL); | |
821 | goto err; | |
822 | } | |
823 | ||
824 | label = plab->parameter->value.octet_string->data; | |
825 | /* Stop label being freed when OAEP parameters are freed */ | |
826 | plab->parameter->value.octet_string->data = NULL; | |
827 | labellen = plab->parameter->value.octet_string->length; | |
828 | } | |
829 | ||
830 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0) | |
831 | goto err; | |
832 | if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0) | |
833 | goto err; | |
834 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) | |
835 | goto err; | |
836 | if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0) | |
837 | goto err; | |
838 | /* Carry on */ | |
839 | rv = 1; | |
840 | ||
841 | err: | |
842 | RSA_OAEP_PARAMS_free(oaep); | |
843 | if (maskHash) | |
844 | X509_ALGOR_free(maskHash); | |
845 | return rv; | |
846 | } | |
0574cadf DSH |
847 | |
848 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
849 | { |
850 | const EVP_MD *md, *mgf1md; | |
851 | RSA_OAEP_PARAMS *oaep = NULL; | |
852 | ASN1_STRING *os = NULL; | |
853 | X509_ALGOR *alg; | |
854 | EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
855 | int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen; | |
856 | unsigned char *label; | |
857 | CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg); | |
858 | if (pkctx) { | |
859 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
860 | return 0; | |
861 | } | |
862 | if (pad_mode == RSA_PKCS1_PADDING) { | |
863 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
864 | return 1; | |
865 | } | |
866 | /* Not supported */ | |
867 | if (pad_mode != RSA_PKCS1_OAEP_PADDING) | |
868 | return 0; | |
869 | if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0) | |
870 | goto err; | |
871 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) | |
872 | goto err; | |
873 | labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label); | |
874 | if (labellen < 0) | |
875 | goto err; | |
876 | oaep = RSA_OAEP_PARAMS_new(); | |
877 | if (!oaep) | |
878 | goto err; | |
879 | if (!rsa_md_to_algor(&oaep->hashFunc, md)) | |
880 | goto err; | |
881 | if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md)) | |
882 | goto err; | |
883 | if (labellen > 0) { | |
884 | ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new(); | |
885 | oaep->pSourceFunc = X509_ALGOR_new(); | |
886 | if (!oaep->pSourceFunc) | |
887 | goto err; | |
888 | if (!los) | |
889 | goto err; | |
890 | if (!ASN1_OCTET_STRING_set(los, label, labellen)) { | |
891 | ASN1_OCTET_STRING_free(los); | |
892 | goto err; | |
893 | } | |
894 | X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified), | |
895 | V_ASN1_OCTET_STRING, los); | |
896 | } | |
897 | /* create string with pss parameter encoding. */ | |
898 | if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os)) | |
899 | goto err; | |
900 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os); | |
901 | os = NULL; | |
902 | rv = 1; | |
903 | err: | |
904 | if (oaep) | |
905 | RSA_OAEP_PARAMS_free(oaep); | |
0dfb9398 | 906 | ASN1_STRING_free(os); |
0f113f3e MC |
907 | return rv; |
908 | } | |
909 | ||
910 | const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = { | |
911 | { | |
912 | EVP_PKEY_RSA, | |
913 | EVP_PKEY_RSA, | |
914 | ASN1_PKEY_SIGPARAM_NULL, | |
915 | ||
916 | "RSA", | |
917 | "OpenSSL RSA method", | |
918 | ||
919 | rsa_pub_decode, | |
920 | rsa_pub_encode, | |
921 | rsa_pub_cmp, | |
922 | rsa_pub_print, | |
923 | ||
924 | rsa_priv_decode, | |
925 | rsa_priv_encode, | |
926 | rsa_priv_print, | |
927 | ||
928 | int_rsa_size, | |
929 | rsa_bits, | |
930 | rsa_security_bits, | |
931 | ||
932 | 0, 0, 0, 0, 0, 0, | |
933 | ||
934 | rsa_sig_print, | |
935 | int_rsa_free, | |
936 | rsa_pkey_ctrl, | |
937 | old_rsa_priv_decode, | |
938 | old_rsa_priv_encode, | |
939 | rsa_item_verify, | |
940 | rsa_item_sign}, | |
941 | ||
942 | { | |
943 | EVP_PKEY_RSA2, | |
944 | EVP_PKEY_RSA, | |
945 | ASN1_PKEY_ALIAS} | |
946 | }; |