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Commit | Line | Data |
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0f113f3e MC |
1 | /* |
2 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
3 | * 2006. | |
448be743 DSH |
4 | */ |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
448be743 DSH |
14 | * |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * licensing@OpenSSL.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
b39fc560 | 60 | #include "internal/cryptlib.h" |
448be743 DSH |
61 | #include <openssl/asn1t.h> |
62 | #include <openssl/x509.h> | |
63 | #include <openssl/rsa.h> | |
1e26a8ba | 64 | #include <openssl/bn.h> |
8931b30d | 65 | #ifndef OPENSSL_NO_CMS |
0f113f3e | 66 | # include <openssl/cms.h> |
8931b30d | 67 | #endif |
5fe736e5 | 68 | #include "internal/asn1_int.h" |
3aeb9348 | 69 | #include "internal/evp_int.h" |
448be743 | 70 | |
e968561d | 71 | #ifndef OPENSSL_NO_CMS |
0574cadf DSH |
72 | static int rsa_cms_sign(CMS_SignerInfo *si); |
73 | static int rsa_cms_verify(CMS_SignerInfo *si); | |
74 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri); | |
75 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri); | |
e968561d | 76 | #endif |
0574cadf | 77 | |
6f81892e | 78 | static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
0f113f3e MC |
79 | { |
80 | unsigned char *penc = NULL; | |
81 | int penclen; | |
82 | penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc); | |
83 | if (penclen <= 0) | |
84 | return 0; | |
85 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA), | |
86 | V_ASN1_NULL, NULL, penc, penclen)) | |
87 | return 1; | |
88 | ||
89 | OPENSSL_free(penc); | |
90 | return 0; | |
91 | } | |
448be743 DSH |
92 | |
93 | static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) | |
0f113f3e MC |
94 | { |
95 | const unsigned char *p; | |
96 | int pklen; | |
97 | RSA *rsa = NULL; | |
75ebbd9a | 98 | |
0f113f3e MC |
99 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey)) |
100 | return 0; | |
75ebbd9a | 101 | if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
102 | RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB); |
103 | return 0; | |
104 | } | |
105 | EVP_PKEY_assign_RSA(pkey, rsa); | |
106 | return 1; | |
107 | } | |
448be743 | 108 | |
6f81892e | 109 | static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
110 | { |
111 | if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0 | |
112 | || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0) | |
113 | return 0; | |
114 | return 1; | |
115 | } | |
6f81892e | 116 | |
e4263314 | 117 | static int old_rsa_priv_decode(EVP_PKEY *pkey, |
0f113f3e MC |
118 | const unsigned char **pder, int derlen) |
119 | { | |
120 | RSA *rsa; | |
75ebbd9a RS |
121 | |
122 | if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) { | |
0f113f3e MC |
123 | RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB); |
124 | return 0; | |
125 | } | |
126 | EVP_PKEY_assign_RSA(pkey, rsa); | |
127 | return 1; | |
128 | } | |
448be743 | 129 | |
e4263314 | 130 | static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) |
0f113f3e MC |
131 | { |
132 | return i2d_RSAPrivateKey(pkey->pkey.rsa, pder); | |
133 | } | |
e4263314 | 134 | |
6f81892e | 135 | static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) |
0f113f3e MC |
136 | { |
137 | unsigned char *rk = NULL; | |
138 | int rklen; | |
139 | rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk); | |
140 | ||
141 | if (rklen <= 0) { | |
142 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
143 | return 0; | |
144 | } | |
145 | ||
146 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0, | |
147 | V_ASN1_NULL, NULL, rk, rklen)) { | |
148 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
149 | return 0; | |
150 | } | |
151 | ||
152 | return 1; | |
153 | } | |
448be743 | 154 | |
e4263314 | 155 | static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
156 | { |
157 | const unsigned char *p; | |
158 | int pklen; | |
159 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8)) | |
160 | return 0; | |
161 | return old_rsa_priv_decode(pkey, &p, pklen); | |
162 | } | |
e4263314 | 163 | |
6f81892e | 164 | static int int_rsa_size(const EVP_PKEY *pkey) |
0f113f3e MC |
165 | { |
166 | return RSA_size(pkey->pkey.rsa); | |
167 | } | |
6f81892e DSH |
168 | |
169 | static int rsa_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
170 | { |
171 | return BN_num_bits(pkey->pkey.rsa->n); | |
172 | } | |
6f81892e | 173 | |
2514fa79 | 174 | static int rsa_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
175 | { |
176 | return RSA_security_bits(pkey->pkey.rsa); | |
177 | } | |
2514fa79 | 178 | |
6f81892e | 179 | static void int_rsa_free(EVP_PKEY *pkey) |
0f113f3e MC |
180 | { |
181 | RSA_free(pkey->pkey.rsa); | |
182 | } | |
35208f36 | 183 | |
35208f36 | 184 | static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv) |
0f113f3e MC |
185 | { |
186 | char *str; | |
187 | const char *s; | |
0f113f3e | 188 | int ret = 0, mod_len = 0; |
0f113f3e MC |
189 | |
190 | if (x->n != NULL) | |
191 | mod_len = BN_num_bits(x->n); | |
192 | ||
193 | if (!BIO_indent(bp, off, 128)) | |
194 | goto err; | |
195 | ||
196 | if (priv && x->d) { | |
a773b52a | 197 | if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0) |
0f113f3e MC |
198 | goto err; |
199 | str = "modulus:"; | |
200 | s = "publicExponent:"; | |
201 | } else { | |
a773b52a | 202 | if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0) |
0f113f3e MC |
203 | goto err; |
204 | str = "Modulus:"; | |
205 | s = "Exponent:"; | |
206 | } | |
a773b52a | 207 | if (!ASN1_bn_print(bp, str, x->n, NULL, off)) |
0f113f3e | 208 | goto err; |
a773b52a | 209 | if (!ASN1_bn_print(bp, s, x->e, NULL, off)) |
0f113f3e MC |
210 | goto err; |
211 | if (priv) { | |
a773b52a | 212 | if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off)) |
0f113f3e | 213 | goto err; |
a773b52a | 214 | if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off)) |
0f113f3e | 215 | goto err; |
a773b52a | 216 | if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off)) |
0f113f3e | 217 | goto err; |
a773b52a | 218 | if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off)) |
0f113f3e | 219 | goto err; |
a773b52a | 220 | if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off)) |
0f113f3e | 221 | goto err; |
a773b52a | 222 | if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off)) |
0f113f3e MC |
223 | goto err; |
224 | } | |
225 | ret = 1; | |
226 | err: | |
0f113f3e MC |
227 | return (ret); |
228 | } | |
35208f36 DSH |
229 | |
230 | static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
231 | ASN1_PCTX *ctx) |
232 | { | |
233 | return do_rsa_print(bp, pkey->pkey.rsa, indent, 0); | |
234 | } | |
35208f36 DSH |
235 | |
236 | static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
237 | ASN1_PCTX *ctx) |
238 | { | |
239 | return do_rsa_print(bp, pkey->pkey.rsa, indent, 1); | |
240 | } | |
35208f36 | 241 | |
0574cadf DSH |
242 | /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */ |
243 | static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg) | |
0f113f3e | 244 | { |
0f113f3e MC |
245 | if (alg == NULL) |
246 | return NULL; | |
247 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) | |
248 | return NULL; | |
e93c8748 DSH |
249 | return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR), |
250 | alg->parameter); | |
0f113f3e | 251 | } |
0574cadf | 252 | |
63b825c9 | 253 | static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg, |
0f113f3e MC |
254 | X509_ALGOR **pmaskHash) |
255 | { | |
0f113f3e MC |
256 | RSA_PSS_PARAMS *pss; |
257 | ||
258 | *pmaskHash = NULL; | |
259 | ||
e93c8748 DSH |
260 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS), |
261 | alg->parameter); | |
0f113f3e MC |
262 | |
263 | if (!pss) | |
264 | return NULL; | |
265 | ||
266 | *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); | |
267 | ||
268 | return pss; | |
269 | } | |
270 | ||
271 | static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, | |
272 | X509_ALGOR *maskHash, int indent) | |
273 | { | |
274 | int rv = 0; | |
275 | if (!pss) { | |
276 | if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0) | |
277 | return 0; | |
278 | return 1; | |
279 | } | |
280 | if (BIO_puts(bp, "\n") <= 0) | |
281 | goto err; | |
282 | if (!BIO_indent(bp, indent, 128)) | |
283 | goto err; | |
284 | if (BIO_puts(bp, "Hash Algorithm: ") <= 0) | |
285 | goto err; | |
286 | ||
287 | if (pss->hashAlgorithm) { | |
288 | if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0) | |
289 | goto err; | |
290 | } else if (BIO_puts(bp, "sha1 (default)") <= 0) | |
291 | goto err; | |
292 | ||
293 | if (BIO_puts(bp, "\n") <= 0) | |
294 | goto err; | |
295 | ||
296 | if (!BIO_indent(bp, indent, 128)) | |
297 | goto err; | |
298 | ||
299 | if (BIO_puts(bp, "Mask Algorithm: ") <= 0) | |
300 | goto err; | |
301 | if (pss->maskGenAlgorithm) { | |
302 | if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0) | |
303 | goto err; | |
304 | if (BIO_puts(bp, " with ") <= 0) | |
305 | goto err; | |
306 | if (maskHash) { | |
307 | if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0) | |
308 | goto err; | |
309 | } else if (BIO_puts(bp, "INVALID") <= 0) | |
310 | goto err; | |
311 | } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) | |
312 | goto err; | |
313 | BIO_puts(bp, "\n"); | |
314 | ||
315 | if (!BIO_indent(bp, indent, 128)) | |
316 | goto err; | |
317 | if (BIO_puts(bp, "Salt Length: 0x") <= 0) | |
318 | goto err; | |
319 | if (pss->saltLength) { | |
320 | if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0) | |
321 | goto err; | |
322 | } else if (BIO_puts(bp, "14 (default)") <= 0) | |
323 | goto err; | |
324 | BIO_puts(bp, "\n"); | |
325 | ||
326 | if (!BIO_indent(bp, indent, 128)) | |
327 | goto err; | |
328 | if (BIO_puts(bp, "Trailer Field: 0x") <= 0) | |
329 | goto err; | |
330 | if (pss->trailerField) { | |
331 | if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0) | |
332 | goto err; | |
333 | } else if (BIO_puts(bp, "BC (default)") <= 0) | |
334 | goto err; | |
335 | BIO_puts(bp, "\n"); | |
336 | ||
337 | rv = 1; | |
338 | ||
339 | err: | |
340 | return rv; | |
341 | ||
342 | } | |
ff04bbe3 DSH |
343 | |
344 | static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, | |
0f113f3e MC |
345 | const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) |
346 | { | |
347 | if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) { | |
348 | int rv; | |
349 | RSA_PSS_PARAMS *pss; | |
350 | X509_ALGOR *maskHash; | |
351 | pss = rsa_pss_decode(sigalg, &maskHash); | |
352 | rv = rsa_pss_param_print(bp, pss, maskHash, indent); | |
25aaa98a | 353 | RSA_PSS_PARAMS_free(pss); |
222561fe | 354 | X509_ALGOR_free(maskHash); |
0f113f3e MC |
355 | if (!rv) |
356 | return 0; | |
357 | } else if (!sig && BIO_puts(bp, "\n") <= 0) | |
358 | return 0; | |
359 | if (sig) | |
360 | return X509_signature_dump(bp, sig, indent); | |
361 | return 1; | |
362 | } | |
492a9e24 DSH |
363 | |
364 | static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
365 | { |
366 | X509_ALGOR *alg = NULL; | |
367 | switch (op) { | |
368 | ||
369 | case ASN1_PKEY_CTRL_PKCS7_SIGN: | |
370 | if (arg1 == 0) | |
371 | PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg); | |
372 | break; | |
373 | ||
374 | case ASN1_PKEY_CTRL_PKCS7_ENCRYPT: | |
375 | if (arg1 == 0) | |
376 | PKCS7_RECIP_INFO_get0_alg(arg2, &alg); | |
377 | break; | |
8931b30d | 378 | #ifndef OPENSSL_NO_CMS |
0f113f3e MC |
379 | case ASN1_PKEY_CTRL_CMS_SIGN: |
380 | if (arg1 == 0) | |
381 | return rsa_cms_sign(arg2); | |
382 | else if (arg1 == 1) | |
383 | return rsa_cms_verify(arg2); | |
384 | break; | |
385 | ||
386 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: | |
387 | if (arg1 == 0) | |
388 | return rsa_cms_encrypt(arg2); | |
389 | else if (arg1 == 1) | |
390 | return rsa_cms_decrypt(arg2); | |
391 | break; | |
392 | ||
393 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: | |
394 | *(int *)arg2 = CMS_RECIPINFO_TRANS; | |
395 | return 1; | |
8931b30d | 396 | #endif |
a78568b7 | 397 | |
0f113f3e MC |
398 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
399 | *(int *)arg2 = NID_sha256; | |
400 | return 1; | |
03919683 | 401 | |
0f113f3e MC |
402 | default: |
403 | return -2; | |
492a9e24 | 404 | |
0f113f3e | 405 | } |
492a9e24 | 406 | |
0f113f3e MC |
407 | if (alg) |
408 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
4f1aa191 | 409 | |
0f113f3e | 410 | return 1; |
4f1aa191 | 411 | |
0f113f3e | 412 | } |
492a9e24 | 413 | |
0574cadf DSH |
414 | /* allocate and set algorithm ID from EVP_MD, default SHA1 */ |
415 | static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md) | |
0f113f3e MC |
416 | { |
417 | if (EVP_MD_type(md) == NID_sha1) | |
418 | return 1; | |
419 | *palg = X509_ALGOR_new(); | |
90945fa3 | 420 | if (*palg == NULL) |
0f113f3e MC |
421 | return 0; |
422 | X509_ALGOR_set_md(*palg, md); | |
423 | return 1; | |
424 | } | |
0574cadf DSH |
425 | |
426 | /* Allocate and set MGF1 algorithm ID from EVP_MD */ | |
427 | static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md) | |
0f113f3e MC |
428 | { |
429 | X509_ALGOR *algtmp = NULL; | |
430 | ASN1_STRING *stmp = NULL; | |
431 | *palg = NULL; | |
432 | if (EVP_MD_type(mgf1md) == NID_sha1) | |
433 | return 1; | |
434 | /* need to embed algorithm ID inside another */ | |
435 | if (!rsa_md_to_algor(&algtmp, mgf1md)) | |
436 | goto err; | |
437 | if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp)) | |
438 | goto err; | |
439 | *palg = X509_ALGOR_new(); | |
90945fa3 | 440 | if (*palg == NULL) |
0f113f3e MC |
441 | goto err; |
442 | X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp); | |
443 | stmp = NULL; | |
444 | err: | |
0dfb9398 | 445 | ASN1_STRING_free(stmp); |
222561fe | 446 | X509_ALGOR_free(algtmp); |
0f113f3e MC |
447 | if (*palg) |
448 | return 1; | |
449 | return 0; | |
450 | } | |
0574cadf DSH |
451 | |
452 | /* convert algorithm ID to EVP_MD, default SHA1 */ | |
453 | static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg) | |
0f113f3e MC |
454 | { |
455 | const EVP_MD *md; | |
456 | if (!alg) | |
457 | return EVP_sha1(); | |
458 | md = EVP_get_digestbyobj(alg->algorithm); | |
459 | if (md == NULL) | |
460 | RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST); | |
461 | return md; | |
462 | } | |
463 | ||
0574cadf DSH |
464 | /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */ |
465 | static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash) | |
0f113f3e MC |
466 | { |
467 | const EVP_MD *md; | |
468 | if (!alg) | |
469 | return EVP_sha1(); | |
470 | /* Check mask and lookup mask hash algorithm */ | |
471 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) { | |
472 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM); | |
473 | return NULL; | |
474 | } | |
475 | if (!maskHash) { | |
476 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER); | |
477 | return NULL; | |
478 | } | |
479 | md = EVP_get_digestbyobj(maskHash->algorithm); | |
480 | if (md == NULL) { | |
481 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST); | |
482 | return NULL; | |
483 | } | |
484 | return md; | |
485 | } | |
486 | ||
487 | /* | |
488 | * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter, | |
0574cadf | 489 | * suitable for setting an AlgorithmIdentifier. |
31904ecd DSH |
490 | */ |
491 | ||
0574cadf | 492 | static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx) |
0f113f3e MC |
493 | { |
494 | const EVP_MD *sigmd, *mgf1md; | |
495 | RSA_PSS_PARAMS *pss = NULL; | |
496 | ASN1_STRING *os = NULL; | |
497 | EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); | |
498 | int saltlen, rv = 0; | |
499 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0) | |
500 | goto err; | |
501 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) | |
502 | goto err; | |
503 | if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) | |
504 | goto err; | |
505 | if (saltlen == -1) | |
506 | saltlen = EVP_MD_size(sigmd); | |
507 | else if (saltlen == -2) { | |
508 | saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; | |
509 | if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) | |
510 | saltlen--; | |
511 | } | |
512 | pss = RSA_PSS_PARAMS_new(); | |
90945fa3 | 513 | if (pss == NULL) |
0f113f3e MC |
514 | goto err; |
515 | if (saltlen != 20) { | |
516 | pss->saltLength = ASN1_INTEGER_new(); | |
90945fa3 | 517 | if (pss->saltLength == NULL) |
0f113f3e MC |
518 | goto err; |
519 | if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) | |
520 | goto err; | |
521 | } | |
522 | if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd)) | |
523 | goto err; | |
524 | if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md)) | |
525 | goto err; | |
526 | /* Finally create string with pss parameter encoding. */ | |
527 | if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) | |
528 | goto err; | |
529 | rv = 1; | |
530 | err: | |
25aaa98a | 531 | RSA_PSS_PARAMS_free(pss); |
0f113f3e MC |
532 | if (rv) |
533 | return os; | |
0dfb9398 | 534 | ASN1_STRING_free(os); |
0f113f3e MC |
535 | return NULL; |
536 | } | |
537 | ||
538 | /* | |
539 | * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL | |
0d4fb843 | 540 | * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are |
0f113f3e | 541 | * passed to pkctx instead. |
0574cadf | 542 | */ |
31904ecd | 543 | |
0574cadf | 544 | static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx, |
0f113f3e MC |
545 | X509_ALGOR *sigalg, EVP_PKEY *pkey) |
546 | { | |
547 | int rv = -1; | |
548 | int saltlen; | |
549 | const EVP_MD *mgf1md = NULL, *md = NULL; | |
550 | RSA_PSS_PARAMS *pss; | |
551 | X509_ALGOR *maskHash; | |
552 | /* Sanity check: make sure it is PSS */ | |
553 | if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { | |
554 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); | |
555 | return -1; | |
556 | } | |
557 | /* Decode PSS parameters */ | |
558 | pss = rsa_pss_decode(sigalg, &maskHash); | |
559 | ||
560 | if (pss == NULL) { | |
561 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS); | |
562 | goto err; | |
563 | } | |
564 | mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash); | |
565 | if (!mgf1md) | |
566 | goto err; | |
567 | md = rsa_algor_to_md(pss->hashAlgorithm); | |
568 | if (!md) | |
569 | goto err; | |
570 | ||
571 | if (pss->saltLength) { | |
572 | saltlen = ASN1_INTEGER_get(pss->saltLength); | |
573 | ||
574 | /* | |
575 | * Could perform more salt length sanity checks but the main RSA | |
576 | * routines will trap other invalid values anyway. | |
577 | */ | |
578 | if (saltlen < 0) { | |
579 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH); | |
580 | goto err; | |
581 | } | |
582 | } else | |
583 | saltlen = 20; | |
584 | ||
585 | /* | |
586 | * low-level routines support only trailer field 0xbc (value 1) and | |
587 | * PKCS#1 says we should reject any other value anyway. | |
588 | */ | |
589 | if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) { | |
590 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER); | |
591 | goto err; | |
592 | } | |
593 | ||
594 | /* We have all parameters now set up context */ | |
595 | ||
596 | if (pkey) { | |
597 | if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey)) | |
598 | goto err; | |
599 | } else { | |
600 | const EVP_MD *checkmd; | |
601 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0) | |
602 | goto err; | |
603 | if (EVP_MD_type(md) != EVP_MD_type(checkmd)) { | |
604 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH); | |
605 | goto err; | |
606 | } | |
607 | } | |
608 | ||
609 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0) | |
610 | goto err; | |
611 | ||
612 | if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0) | |
613 | goto err; | |
614 | ||
615 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) | |
616 | goto err; | |
617 | /* Carry on */ | |
618 | rv = 1; | |
619 | ||
620 | err: | |
621 | RSA_PSS_PARAMS_free(pss); | |
222561fe | 622 | X509_ALGOR_free(maskHash); |
0f113f3e MC |
623 | return rv; |
624 | } | |
492a9e24 | 625 | |
e968561d | 626 | #ifndef OPENSSL_NO_CMS |
0574cadf | 627 | static int rsa_cms_verify(CMS_SignerInfo *si) |
0f113f3e MC |
628 | { |
629 | int nid, nid2; | |
630 | X509_ALGOR *alg; | |
631 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si); | |
632 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg); | |
633 | nid = OBJ_obj2nid(alg->algorithm); | |
634 | if (nid == NID_rsaEncryption) | |
635 | return 1; | |
636 | if (nid == NID_rsassaPss) | |
637 | return rsa_pss_to_ctx(NULL, pkctx, alg, NULL); | |
638 | /* Workaround for some implementation that use a signature OID */ | |
639 | if (OBJ_find_sigid_algs(nid, NULL, &nid2)) { | |
640 | if (nid2 == NID_rsaEncryption) | |
641 | return 1; | |
642 | } | |
643 | return 0; | |
644 | } | |
e968561d | 645 | #endif |
0f113f3e MC |
646 | |
647 | /* | |
648 | * Customised RSA item verification routine. This is called when a signature | |
649 | * is encountered requiring special handling. We currently only handle PSS. | |
0574cadf DSH |
650 | */ |
651 | ||
0574cadf | 652 | static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, |
0f113f3e MC |
653 | X509_ALGOR *sigalg, ASN1_BIT_STRING *sig, |
654 | EVP_PKEY *pkey) | |
655 | { | |
656 | /* Sanity check: make sure it is PSS */ | |
657 | if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { | |
658 | RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); | |
659 | return -1; | |
660 | } | |
09f06923 | 661 | if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) { |
0f113f3e MC |
662 | /* Carry on */ |
663 | return 2; | |
09f06923 | 664 | } |
0f113f3e MC |
665 | return -1; |
666 | } | |
0574cadf | 667 | |
e968561d | 668 | #ifndef OPENSSL_NO_CMS |
0574cadf | 669 | static int rsa_cms_sign(CMS_SignerInfo *si) |
0f113f3e MC |
670 | { |
671 | int pad_mode = RSA_PKCS1_PADDING; | |
672 | X509_ALGOR *alg; | |
673 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si); | |
674 | ASN1_STRING *os = NULL; | |
675 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg); | |
676 | if (pkctx) { | |
677 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
678 | return 0; | |
679 | } | |
680 | if (pad_mode == RSA_PKCS1_PADDING) { | |
681 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
682 | return 1; | |
683 | } | |
684 | /* We don't support it */ | |
685 | if (pad_mode != RSA_PKCS1_PSS_PADDING) | |
686 | return 0; | |
687 | os = rsa_ctx_to_pss(pkctx); | |
688 | if (!os) | |
689 | return 0; | |
690 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os); | |
691 | return 1; | |
692 | } | |
e968561d | 693 | #endif |
0574cadf | 694 | |
17c63d1c | 695 | static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, |
0f113f3e MC |
696 | X509_ALGOR *alg1, X509_ALGOR *alg2, |
697 | ASN1_BIT_STRING *sig) | |
698 | { | |
699 | int pad_mode; | |
6e59a892 | 700 | EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx); |
0f113f3e MC |
701 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) |
702 | return 0; | |
703 | if (pad_mode == RSA_PKCS1_PADDING) | |
704 | return 2; | |
705 | if (pad_mode == RSA_PKCS1_PSS_PADDING) { | |
706 | ASN1_STRING *os1 = NULL; | |
707 | os1 = rsa_ctx_to_pss(pkctx); | |
708 | if (!os1) | |
709 | return 0; | |
710 | /* Duplicate parameters if we have to */ | |
711 | if (alg2) { | |
712 | ASN1_STRING *os2 = ASN1_STRING_dup(os1); | |
713 | if (!os2) { | |
714 | ASN1_STRING_free(os1); | |
715 | return 0; | |
716 | } | |
717 | X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss), | |
718 | V_ASN1_SEQUENCE, os2); | |
719 | } | |
720 | X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss), | |
721 | V_ASN1_SEQUENCE, os1); | |
722 | return 3; | |
723 | } | |
724 | return 2; | |
725 | } | |
17c63d1c | 726 | |
e968561d | 727 | #ifndef OPENSSL_NO_CMS |
0574cadf | 728 | static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg, |
0f113f3e MC |
729 | X509_ALGOR **pmaskHash) |
730 | { | |
0f113f3e | 731 | RSA_OAEP_PARAMS *pss; |
0574cadf | 732 | |
0f113f3e | 733 | *pmaskHash = NULL; |
0574cadf | 734 | |
e93c8748 DSH |
735 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS), |
736 | alg->parameter); | |
0574cadf | 737 | |
0f113f3e MC |
738 | if (!pss) |
739 | return NULL; | |
0574cadf | 740 | |
0f113f3e | 741 | *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc); |
0574cadf | 742 | |
0f113f3e MC |
743 | return pss; |
744 | } | |
0574cadf DSH |
745 | |
746 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
747 | { |
748 | EVP_PKEY_CTX *pkctx; | |
749 | X509_ALGOR *cmsalg; | |
750 | int nid; | |
751 | int rv = -1; | |
752 | unsigned char *label = NULL; | |
753 | int labellen = 0; | |
754 | const EVP_MD *mgf1md = NULL, *md = NULL; | |
755 | RSA_OAEP_PARAMS *oaep; | |
756 | X509_ALGOR *maskHash; | |
757 | pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
758 | if (!pkctx) | |
759 | return 0; | |
760 | if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg)) | |
761 | return -1; | |
762 | nid = OBJ_obj2nid(cmsalg->algorithm); | |
763 | if (nid == NID_rsaEncryption) | |
764 | return 1; | |
765 | if (nid != NID_rsaesOaep) { | |
766 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE); | |
767 | return -1; | |
768 | } | |
769 | /* Decode OAEP parameters */ | |
770 | oaep = rsa_oaep_decode(cmsalg, &maskHash); | |
771 | ||
772 | if (oaep == NULL) { | |
773 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS); | |
774 | goto err; | |
775 | } | |
776 | ||
777 | mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash); | |
778 | if (!mgf1md) | |
779 | goto err; | |
780 | md = rsa_algor_to_md(oaep->hashFunc); | |
781 | if (!md) | |
782 | goto err; | |
783 | ||
784 | if (oaep->pSourceFunc) { | |
785 | X509_ALGOR *plab = oaep->pSourceFunc; | |
786 | if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) { | |
787 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE); | |
788 | goto err; | |
789 | } | |
790 | if (plab->parameter->type != V_ASN1_OCTET_STRING) { | |
791 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL); | |
792 | goto err; | |
793 | } | |
794 | ||
795 | label = plab->parameter->value.octet_string->data; | |
796 | /* Stop label being freed when OAEP parameters are freed */ | |
797 | plab->parameter->value.octet_string->data = NULL; | |
798 | labellen = plab->parameter->value.octet_string->length; | |
799 | } | |
800 | ||
801 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0) | |
802 | goto err; | |
803 | if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0) | |
804 | goto err; | |
805 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) | |
806 | goto err; | |
807 | if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0) | |
808 | goto err; | |
809 | /* Carry on */ | |
810 | rv = 1; | |
811 | ||
812 | err: | |
813 | RSA_OAEP_PARAMS_free(oaep); | |
222561fe | 814 | X509_ALGOR_free(maskHash); |
0f113f3e MC |
815 | return rv; |
816 | } | |
0574cadf DSH |
817 | |
818 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
819 | { |
820 | const EVP_MD *md, *mgf1md; | |
821 | RSA_OAEP_PARAMS *oaep = NULL; | |
822 | ASN1_STRING *os = NULL; | |
823 | X509_ALGOR *alg; | |
824 | EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
825 | int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen; | |
826 | unsigned char *label; | |
827 | CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg); | |
828 | if (pkctx) { | |
829 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
830 | return 0; | |
831 | } | |
832 | if (pad_mode == RSA_PKCS1_PADDING) { | |
833 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); | |
834 | return 1; | |
835 | } | |
836 | /* Not supported */ | |
837 | if (pad_mode != RSA_PKCS1_OAEP_PADDING) | |
838 | return 0; | |
839 | if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0) | |
840 | goto err; | |
841 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) | |
842 | goto err; | |
843 | labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label); | |
844 | if (labellen < 0) | |
845 | goto err; | |
846 | oaep = RSA_OAEP_PARAMS_new(); | |
90945fa3 | 847 | if (oaep == NULL) |
0f113f3e MC |
848 | goto err; |
849 | if (!rsa_md_to_algor(&oaep->hashFunc, md)) | |
850 | goto err; | |
851 | if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md)) | |
852 | goto err; | |
853 | if (labellen > 0) { | |
854 | ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new(); | |
855 | oaep->pSourceFunc = X509_ALGOR_new(); | |
90945fa3 | 856 | if (oaep->pSourceFunc == NULL) |
0f113f3e | 857 | goto err; |
90945fa3 | 858 | if (los == NULL) |
0f113f3e MC |
859 | goto err; |
860 | if (!ASN1_OCTET_STRING_set(los, label, labellen)) { | |
861 | ASN1_OCTET_STRING_free(los); | |
862 | goto err; | |
863 | } | |
864 | X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified), | |
865 | V_ASN1_OCTET_STRING, los); | |
866 | } | |
867 | /* create string with pss parameter encoding. */ | |
868 | if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os)) | |
869 | goto err; | |
870 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os); | |
871 | os = NULL; | |
872 | rv = 1; | |
873 | err: | |
25aaa98a | 874 | RSA_OAEP_PARAMS_free(oaep); |
0dfb9398 | 875 | ASN1_STRING_free(os); |
0f113f3e MC |
876 | return rv; |
877 | } | |
e968561d | 878 | #endif |
0f113f3e MC |
879 | |
880 | const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = { | |
881 | { | |
882 | EVP_PKEY_RSA, | |
883 | EVP_PKEY_RSA, | |
884 | ASN1_PKEY_SIGPARAM_NULL, | |
885 | ||
886 | "RSA", | |
887 | "OpenSSL RSA method", | |
888 | ||
889 | rsa_pub_decode, | |
890 | rsa_pub_encode, | |
891 | rsa_pub_cmp, | |
892 | rsa_pub_print, | |
893 | ||
894 | rsa_priv_decode, | |
895 | rsa_priv_encode, | |
896 | rsa_priv_print, | |
897 | ||
898 | int_rsa_size, | |
899 | rsa_bits, | |
900 | rsa_security_bits, | |
901 | ||
902 | 0, 0, 0, 0, 0, 0, | |
903 | ||
904 | rsa_sig_print, | |
905 | int_rsa_free, | |
906 | rsa_pkey_ctrl, | |
907 | old_rsa_priv_decode, | |
908 | old_rsa_priv_encode, | |
909 | rsa_item_verify, | |
910 | rsa_item_sign}, | |
911 | ||
912 | { | |
913 | EVP_PKEY_RSA2, | |
914 | EVP_PKEY_RSA, | |
915 | ASN1_PKEY_ALIAS} | |
916 | }; |