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6f4b7663 | 1 | /* |
33388b44 | 2 | * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved. |
6f4b7663 RL |
3 | * |
4 | * Licensed under the Apache License 2.0 (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 | /* | |
11 | * RSA low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
16 | #include <string.h> | |
17 | #include <openssl/crypto.h> | |
23c48d94 | 18 | #include <openssl/core_dispatch.h> |
6f4b7663 RL |
19 | #include <openssl/core_names.h> |
20 | #include <openssl/err.h> | |
21 | #include <openssl/rsa.h> | |
22 | #include <openssl/params.h> | |
23 | #include <openssl/evp.h> | |
24 | #include "internal/cryptlib.h" | |
25 | #include "internal/nelem.h" | |
26 | #include "internal/sizes.h" | |
27 | #include "crypto/rsa.h" | |
f590a5ea | 28 | #include "prov/providercommon.h" |
6f4b7663 RL |
29 | #include "prov/providercommonerr.h" |
30 | #include "prov/implementations.h" | |
31 | #include "prov/provider_ctx.h" | |
6f5837dc | 32 | #include "prov/der_rsa.h" |
7a810fac | 33 | #include "prov/securitycheck.h" |
3f699197 SL |
34 | |
35 | #define RSA_DEFAULT_DIGEST_NAME OSSL_DIGEST_NAME_SHA1 | |
6f4b7663 | 36 | |
363b1e5d DMSP |
37 | static OSSL_FUNC_signature_newctx_fn rsa_newctx; |
38 | static OSSL_FUNC_signature_sign_init_fn rsa_sign_init; | |
39 | static OSSL_FUNC_signature_verify_init_fn rsa_verify_init; | |
40 | static OSSL_FUNC_signature_verify_recover_init_fn rsa_verify_recover_init; | |
41 | static OSSL_FUNC_signature_sign_fn rsa_sign; | |
42 | static OSSL_FUNC_signature_verify_fn rsa_verify; | |
43 | static OSSL_FUNC_signature_verify_recover_fn rsa_verify_recover; | |
44 | static OSSL_FUNC_signature_digest_sign_init_fn rsa_digest_sign_init; | |
45 | static OSSL_FUNC_signature_digest_sign_update_fn rsa_digest_signverify_update; | |
46 | static OSSL_FUNC_signature_digest_sign_final_fn rsa_digest_sign_final; | |
47 | static OSSL_FUNC_signature_digest_verify_init_fn rsa_digest_verify_init; | |
48 | static OSSL_FUNC_signature_digest_verify_update_fn rsa_digest_signverify_update; | |
49 | static OSSL_FUNC_signature_digest_verify_final_fn rsa_digest_verify_final; | |
50 | static OSSL_FUNC_signature_freectx_fn rsa_freectx; | |
51 | static OSSL_FUNC_signature_dupctx_fn rsa_dupctx; | |
52 | static OSSL_FUNC_signature_get_ctx_params_fn rsa_get_ctx_params; | |
53 | static OSSL_FUNC_signature_gettable_ctx_params_fn rsa_gettable_ctx_params; | |
54 | static OSSL_FUNC_signature_set_ctx_params_fn rsa_set_ctx_params; | |
55 | static OSSL_FUNC_signature_settable_ctx_params_fn rsa_settable_ctx_params; | |
56 | static OSSL_FUNC_signature_get_ctx_md_params_fn rsa_get_ctx_md_params; | |
57 | static OSSL_FUNC_signature_gettable_ctx_md_params_fn rsa_gettable_ctx_md_params; | |
58 | static OSSL_FUNC_signature_set_ctx_md_params_fn rsa_set_ctx_md_params; | |
59 | static OSSL_FUNC_signature_settable_ctx_md_params_fn rsa_settable_ctx_md_params; | |
6f4b7663 RL |
60 | |
61 | static OSSL_ITEM padding_item[] = { | |
b8086652 SL |
62 | { RSA_PKCS1_PADDING, OSSL_PKEY_RSA_PAD_MODE_PKCSV15 }, |
63 | { RSA_SSLV23_PADDING, OSSL_PKEY_RSA_PAD_MODE_SSLV23 }, | |
64 | { RSA_NO_PADDING, OSSL_PKEY_RSA_PAD_MODE_NONE }, | |
65 | { RSA_X931_PADDING, OSSL_PKEY_RSA_PAD_MODE_X931 }, | |
66 | { RSA_PKCS1_PSS_PADDING, OSSL_PKEY_RSA_PAD_MODE_PSS }, | |
6f4b7663 RL |
67 | { 0, NULL } |
68 | }; | |
69 | ||
70 | /* | |
71 | * What's passed as an actual key is defined by the KEYMGMT interface. | |
72 | * We happen to know that our KEYMGMT simply passes RSA structures, so | |
73 | * we use that here too. | |
74 | */ | |
75 | ||
76 | typedef struct { | |
77 | OPENSSL_CTX *libctx; | |
2c6094ba | 78 | char *propq; |
6f4b7663 | 79 | RSA *rsa; |
0ec36bf1 | 80 | int operation; |
6f4b7663 RL |
81 | |
82 | /* | |
83 | * Flag to determine if the hash function can be changed (1) or not (0) | |
84 | * Because it's dangerous to change during a DigestSign or DigestVerify | |
85 | * operation, this flag is cleared by their Init function, and set again | |
86 | * by their Final function. | |
87 | */ | |
88 | unsigned int flag_allow_md : 1; | |
89 | ||
3f699197 | 90 | /* The Algorithm Identifier of the combined signature algorithm */ |
6f5837dc RL |
91 | unsigned char aid_buf[128]; |
92 | unsigned char *aid; | |
6f4b7663 RL |
93 | size_t aid_len; |
94 | ||
95 | /* main digest */ | |
96 | EVP_MD *md; | |
97 | EVP_MD_CTX *mdctx; | |
98 | int mdnid; | |
99 | char mdname[OSSL_MAX_NAME_SIZE]; /* Purely informational */ | |
100 | ||
101 | /* RSA padding mode */ | |
102 | int pad_mode; | |
103 | /* message digest for MGF1 */ | |
104 | EVP_MD *mgf1_md; | |
105 | char mgf1_mdname[OSSL_MAX_NAME_SIZE]; /* Purely informational */ | |
106 | /* PSS salt length */ | |
107 | int saltlen; | |
108 | /* Minimum salt length or -1 if no PSS parameter restriction */ | |
109 | int min_saltlen; | |
110 | ||
111 | /* Temp buffer */ | |
112 | unsigned char *tbuf; | |
113 | ||
114 | } PROV_RSA_CTX; | |
115 | ||
116 | static size_t rsa_get_md_size(const PROV_RSA_CTX *prsactx) | |
117 | { | |
118 | if (prsactx->md != NULL) | |
119 | return EVP_MD_size(prsactx->md); | |
120 | return 0; | |
121 | } | |
122 | ||
6f4b7663 RL |
123 | static int rsa_check_padding(int mdnid, int padding) |
124 | { | |
125 | if (padding == RSA_NO_PADDING) { | |
126 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE); | |
127 | return 0; | |
128 | } | |
129 | ||
130 | if (padding == RSA_X931_PADDING) { | |
131 | if (RSA_X931_hash_id(mdnid) == -1) { | |
132 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_X931_DIGEST); | |
133 | return 0; | |
134 | } | |
135 | } | |
136 | ||
137 | return 1; | |
138 | } | |
139 | ||
6ce6ad39 | 140 | static int rsa_check_parameters(PROV_RSA_CTX *prsactx) |
2d553660 RL |
141 | { |
142 | if (prsactx->pad_mode == RSA_PKCS1_PSS_PADDING) { | |
143 | int max_saltlen; | |
144 | ||
145 | /* See if minimum salt length exceeds maximum possible */ | |
6ce6ad39 | 146 | max_saltlen = RSA_size(prsactx->rsa) - EVP_MD_size(prsactx->md); |
2d553660 RL |
147 | if ((RSA_bits(prsactx->rsa) & 0x7) == 1) |
148 | max_saltlen--; | |
6ce6ad39 | 149 | if (prsactx->min_saltlen < 0 || prsactx->min_saltlen > max_saltlen) { |
2d553660 RL |
150 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_SALT_LENGTH); |
151 | return 0; | |
152 | } | |
153 | } | |
154 | return 1; | |
155 | } | |
156 | ||
2c6094ba | 157 | static void *rsa_newctx(void *provctx, const char *propq) |
6f4b7663 | 158 | { |
2d553660 RL |
159 | PROV_RSA_CTX *prsactx = NULL; |
160 | char *propq_copy = NULL; | |
6f4b7663 | 161 | |
f590a5ea P |
162 | if (!ossl_prov_is_running()) |
163 | return NULL; | |
164 | ||
2d553660 RL |
165 | if ((prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX))) == NULL |
166 | || (propq != NULL | |
167 | && (propq_copy = OPENSSL_strdup(propq)) == NULL)) { | |
168 | OPENSSL_free(prsactx); | |
169 | ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); | |
6f4b7663 | 170 | return NULL; |
2d553660 | 171 | } |
6f4b7663 RL |
172 | |
173 | prsactx->libctx = PROV_LIBRARY_CONTEXT_OF(provctx); | |
174 | prsactx->flag_allow_md = 1; | |
2d553660 | 175 | prsactx->propq = propq_copy; |
6f4b7663 RL |
176 | return prsactx; |
177 | } | |
178 | ||
179 | /* True if PSS parameters are restricted */ | |
180 | #define rsa_pss_restricted(prsactx) (prsactx->min_saltlen != -1) | |
181 | ||
6f4b7663 RL |
182 | static int rsa_setup_md(PROV_RSA_CTX *ctx, const char *mdname, |
183 | const char *mdprops) | |
184 | { | |
2c6094ba RL |
185 | if (mdprops == NULL) |
186 | mdprops = ctx->propq; | |
187 | ||
6f4b7663 | 188 | if (mdname != NULL) { |
6f5837dc | 189 | WPACKET pkt; |
3f699197 | 190 | EVP_MD *md = EVP_MD_fetch(ctx->libctx, mdname, mdprops); |
49ed5ba8 SL |
191 | int sha1_allowed = (ctx->operation != EVP_PKEY_OP_SIGN); |
192 | int md_nid = digest_rsa_sign_get_md_nid(md, sha1_allowed); | |
2de64666 | 193 | size_t mdname_len = strlen(mdname); |
6f4b7663 | 194 | |
6f5837dc RL |
195 | if (md == NULL |
196 | || md_nid == NID_undef | |
2d553660 | 197 | || !rsa_check_padding(md_nid, ctx->pad_mode) |
2de64666 | 198 | || mdname_len >= sizeof(ctx->mdname)) { |
2d553660 RL |
199 | if (md == NULL) |
200 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST, | |
201 | "%s could not be fetched", mdname); | |
202 | if (md_nid == NID_undef) | |
203 | ERR_raise_data(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED, | |
204 | "digest=%s", mdname); | |
2de64666 NT |
205 | if (mdname_len >= sizeof(ctx->mdname)) |
206 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST, | |
207 | "%s exceeds name buffer length", mdname); | |
6f4b7663 RL |
208 | EVP_MD_free(md); |
209 | return 0; | |
210 | } | |
211 | ||
212 | EVP_MD_CTX_free(ctx->mdctx); | |
213 | EVP_MD_free(ctx->md); | |
6f4b7663 | 214 | |
6f5837dc RL |
215 | /* |
216 | * TODO(3.0) Should we care about DER writing errors? | |
217 | * All it really means is that for some reason, there's no | |
218 | * AlgorithmIdentifier to be had (consider RSA with MD5-SHA1), | |
219 | * but the operation itself is still valid, just as long as it's | |
220 | * not used to construct anything that needs an AlgorithmIdentifier. | |
221 | */ | |
222 | ctx->aid_len = 0; | |
223 | if (WPACKET_init_der(&pkt, ctx->aid_buf, sizeof(ctx->aid_buf)) | |
a30027b6 RL |
224 | && DER_w_algorithmIdentifier_MDWithRSAEncryption(&pkt, -1, ctx->rsa, |
225 | md_nid) | |
6f5837dc RL |
226 | && WPACKET_finish(&pkt)) { |
227 | WPACKET_get_total_written(&pkt, &ctx->aid_len); | |
228 | ctx->aid = WPACKET_get_curr(&pkt); | |
229 | } | |
230 | WPACKET_cleanup(&pkt); | |
6f4b7663 | 231 | |
6f5837dc | 232 | ctx->mdctx = NULL; |
6f4b7663 RL |
233 | ctx->md = md; |
234 | ctx->mdnid = md_nid; | |
235 | OPENSSL_strlcpy(ctx->mdname, mdname, sizeof(ctx->mdname)); | |
6f4b7663 RL |
236 | } |
237 | ||
238 | return 1; | |
239 | } | |
240 | ||
241 | static int rsa_setup_mgf1_md(PROV_RSA_CTX *ctx, const char *mdname, | |
2c6094ba | 242 | const char *mdprops) |
6f4b7663 | 243 | { |
2de64666 | 244 | size_t len; |
3f699197 | 245 | EVP_MD *md = NULL; |
2de64666 | 246 | |
2c6094ba RL |
247 | if (mdprops == NULL) |
248 | mdprops = ctx->propq; | |
249 | ||
6f4b7663 RL |
250 | if (ctx->mgf1_mdname[0] != '\0') |
251 | EVP_MD_free(ctx->mgf1_md); | |
252 | ||
3f699197 | 253 | if ((md = EVP_MD_fetch(ctx->libctx, mdname, mdprops)) == NULL) { |
2d553660 RL |
254 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST, |
255 | "%s could not be fetched", mdname); | |
6f4b7663 | 256 | return 0; |
2d553660 | 257 | } |
49ed5ba8 SL |
258 | /* The default for mgf1 is SHA1 - so allow SHA1 */ |
259 | if (digest_rsa_sign_get_md_nid(md, 1) == NID_undef) { | |
3f699197 SL |
260 | ERR_raise_data(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED, |
261 | "digest=%s", mdname); | |
262 | EVP_MD_free(md); | |
263 | return 0; | |
264 | } | |
265 | ctx->mgf1_md = md; | |
2de64666 NT |
266 | len = OPENSSL_strlcpy(ctx->mgf1_mdname, mdname, sizeof(ctx->mgf1_mdname)); |
267 | if (len >= sizeof(ctx->mgf1_mdname)) { | |
268 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST, | |
269 | "%s exceeds name buffer length", mdname); | |
270 | return 0; | |
271 | } | |
6f4b7663 RL |
272 | |
273 | return 1; | |
274 | } | |
275 | ||
3f699197 | 276 | static int rsa_signverify_init(void *vprsactx, void *vrsa, int operation) |
2d553660 RL |
277 | { |
278 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
279 | ||
f590a5ea P |
280 | if (!ossl_prov_is_running()) |
281 | return 0; | |
282 | ||
2d553660 RL |
283 | if (prsactx == NULL || vrsa == NULL || !RSA_up_ref(vrsa)) |
284 | return 0; | |
285 | ||
286 | RSA_free(prsactx->rsa); | |
287 | prsactx->rsa = vrsa; | |
288 | prsactx->operation = operation; | |
289 | ||
49ed5ba8 | 290 | if (!rsa_check_key(vrsa, operation == EVP_PKEY_OP_SIGN)) { |
3f699197 SL |
291 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH); |
292 | return 0; | |
293 | } | |
294 | ||
2d553660 RL |
295 | /* Maximum for sign, auto for verify */ |
296 | prsactx->saltlen = RSA_PSS_SALTLEN_AUTO; | |
297 | prsactx->min_saltlen = -1; | |
298 | ||
299 | switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) { | |
300 | case RSA_FLAG_TYPE_RSA: | |
301 | prsactx->pad_mode = RSA_PKCS1_PADDING; | |
302 | break; | |
303 | case RSA_FLAG_TYPE_RSASSAPSS: | |
304 | prsactx->pad_mode = RSA_PKCS1_PSS_PADDING; | |
305 | ||
306 | { | |
307 | const RSA_PSS_PARAMS_30 *pss = | |
308 | rsa_get0_pss_params_30(prsactx->rsa); | |
309 | ||
310 | if (!rsa_pss_params_30_is_unrestricted(pss)) { | |
311 | int md_nid = rsa_pss_params_30_hashalg(pss); | |
312 | int mgf1md_nid = rsa_pss_params_30_maskgenhashalg(pss); | |
313 | int min_saltlen = rsa_pss_params_30_saltlen(pss); | |
314 | const char *mdname, *mgf1mdname; | |
2de64666 | 315 | size_t len; |
2d553660 RL |
316 | |
317 | mdname = rsa_oaeppss_nid2name(md_nid); | |
318 | mgf1mdname = rsa_oaeppss_nid2name(mgf1md_nid); | |
319 | prsactx->min_saltlen = min_saltlen; | |
320 | ||
321 | if (mdname == NULL) { | |
322 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST, | |
323 | "PSS restrictions lack hash algorithm"); | |
324 | return 0; | |
325 | } | |
326 | if (mgf1mdname == NULL) { | |
327 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST, | |
328 | "PSS restrictions lack MGF1 hash algorithm"); | |
329 | return 0; | |
330 | } | |
331 | ||
2de64666 NT |
332 | len = OPENSSL_strlcpy(prsactx->mdname, mdname, |
333 | sizeof(prsactx->mdname)); | |
334 | if (len >= sizeof(prsactx->mdname)) { | |
335 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST, | |
336 | "hash algorithm name too long"); | |
337 | return 0; | |
338 | } | |
339 | len = OPENSSL_strlcpy(prsactx->mgf1_mdname, mgf1mdname, | |
340 | sizeof(prsactx->mgf1_mdname)); | |
341 | if (len >= sizeof(prsactx->mgf1_mdname)) { | |
342 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST, | |
343 | "MGF1 hash algorithm name too long"); | |
344 | return 0; | |
345 | } | |
2d553660 RL |
346 | prsactx->saltlen = min_saltlen; |
347 | ||
348 | return rsa_setup_md(prsactx, mdname, prsactx->propq) | |
6ce6ad39 RL |
349 | && rsa_setup_mgf1_md(prsactx, mgf1mdname, prsactx->propq) |
350 | && rsa_check_parameters(prsactx); | |
2d553660 RL |
351 | } |
352 | } | |
353 | ||
354 | break; | |
355 | default: | |
356 | ERR_raise(ERR_LIB_RSA, PROV_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); | |
357 | return 0; | |
358 | } | |
359 | ||
360 | return 1; | |
361 | } | |
362 | ||
6f4b7663 RL |
363 | static int setup_tbuf(PROV_RSA_CTX *ctx) |
364 | { | |
365 | if (ctx->tbuf != NULL) | |
366 | return 1; | |
367 | if ((ctx->tbuf = OPENSSL_malloc(RSA_size(ctx->rsa))) == NULL) { | |
368 | ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); | |
369 | return 0; | |
370 | } | |
371 | return 1; | |
372 | } | |
373 | ||
374 | static void clean_tbuf(PROV_RSA_CTX *ctx) | |
375 | { | |
376 | if (ctx->tbuf != NULL) | |
377 | OPENSSL_cleanse(ctx->tbuf, RSA_size(ctx->rsa)); | |
378 | } | |
379 | ||
380 | static void free_tbuf(PROV_RSA_CTX *ctx) | |
381 | { | |
2d553660 RL |
382 | clean_tbuf(ctx); |
383 | OPENSSL_free(ctx->tbuf); | |
6f4b7663 RL |
384 | ctx->tbuf = NULL; |
385 | } | |
386 | ||
0ec36bf1 RL |
387 | static int rsa_sign_init(void *vprsactx, void *vrsa) |
388 | { | |
f590a5ea P |
389 | if (!ossl_prov_is_running()) |
390 | return 0; | |
3f699197 | 391 | return rsa_signverify_init(vprsactx, vrsa, EVP_PKEY_OP_SIGN); |
0ec36bf1 RL |
392 | } |
393 | ||
6f4b7663 RL |
394 | static int rsa_sign(void *vprsactx, unsigned char *sig, size_t *siglen, |
395 | size_t sigsize, const unsigned char *tbs, size_t tbslen) | |
396 | { | |
397 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
398 | int ret; | |
399 | size_t rsasize = RSA_size(prsactx->rsa); | |
400 | size_t mdsize = rsa_get_md_size(prsactx); | |
401 | ||
f590a5ea P |
402 | if (!ossl_prov_is_running()) |
403 | return 0; | |
404 | ||
6f4b7663 RL |
405 | if (sig == NULL) { |
406 | *siglen = rsasize; | |
407 | return 1; | |
408 | } | |
409 | ||
2d553660 RL |
410 | if (sigsize < rsasize) { |
411 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_SIGNATURE_SIZE, | |
412 | "is %zu, should be at least %zu", sigsize, rsasize); | |
6f4b7663 | 413 | return 0; |
2d553660 | 414 | } |
6f4b7663 RL |
415 | |
416 | if (mdsize != 0) { | |
417 | if (tbslen != mdsize) { | |
418 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_LENGTH); | |
419 | return 0; | |
420 | } | |
421 | ||
f844f9eb | 422 | #ifndef FIPS_MODULE |
6f4b7663 RL |
423 | if (EVP_MD_is_a(prsactx->md, OSSL_DIGEST_NAME_MDC2)) { |
424 | unsigned int sltmp; | |
425 | ||
426 | if (prsactx->pad_mode != RSA_PKCS1_PADDING) { | |
427 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE, | |
428 | "only PKCS#1 padding supported with MDC2"); | |
429 | return 0; | |
430 | } | |
431 | ret = RSA_sign_ASN1_OCTET_STRING(0, tbs, tbslen, sig, &sltmp, | |
432 | prsactx->rsa); | |
433 | ||
434 | if (ret <= 0) { | |
435 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
436 | return 0; | |
437 | } | |
438 | ret = sltmp; | |
439 | goto end; | |
440 | } | |
1b6ea308 | 441 | #endif |
6f4b7663 RL |
442 | switch (prsactx->pad_mode) { |
443 | case RSA_X931_PADDING: | |
444 | if ((size_t)RSA_size(prsactx->rsa) < tbslen + 1) { | |
2d553660 RL |
445 | ERR_raise_data(ERR_LIB_PROV, PROV_R_KEY_SIZE_TOO_SMALL, |
446 | "RSA key size = %d, expected minimum = %d", | |
447 | RSA_size(prsactx->rsa), tbslen + 1); | |
6f4b7663 RL |
448 | return 0; |
449 | } | |
450 | if (!setup_tbuf(prsactx)) { | |
451 | ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); | |
452 | return 0; | |
453 | } | |
454 | memcpy(prsactx->tbuf, tbs, tbslen); | |
455 | prsactx->tbuf[tbslen] = RSA_X931_hash_id(prsactx->mdnid); | |
456 | ret = RSA_private_encrypt(tbslen + 1, prsactx->tbuf, | |
457 | sig, prsactx->rsa, RSA_X931_PADDING); | |
458 | clean_tbuf(prsactx); | |
459 | break; | |
460 | ||
461 | case RSA_PKCS1_PADDING: | |
462 | { | |
463 | unsigned int sltmp; | |
464 | ||
465 | ret = RSA_sign(prsactx->mdnid, tbs, tbslen, sig, &sltmp, | |
466 | prsactx->rsa); | |
467 | if (ret <= 0) { | |
468 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
469 | return 0; | |
470 | } | |
471 | ret = sltmp; | |
472 | } | |
473 | break; | |
474 | ||
475 | case RSA_PKCS1_PSS_PADDING: | |
476 | /* Check PSS restrictions */ | |
477 | if (rsa_pss_restricted(prsactx)) { | |
478 | switch (prsactx->saltlen) { | |
479 | case RSA_PSS_SALTLEN_DIGEST: | |
480 | if (prsactx->min_saltlen > EVP_MD_size(prsactx->md)) { | |
2d553660 RL |
481 | ERR_raise_data(ERR_LIB_PROV, |
482 | PROV_R_PSS_SALTLEN_TOO_SMALL, | |
483 | "minimum salt length set to %d, " | |
484 | "but the digest only gives %d", | |
485 | prsactx->min_saltlen, | |
486 | EVP_MD_size(prsactx->md)); | |
6f4b7663 RL |
487 | return 0; |
488 | } | |
489 | /* FALLTHRU */ | |
490 | default: | |
491 | if (prsactx->saltlen >= 0 | |
492 | && prsactx->saltlen < prsactx->min_saltlen) { | |
2d553660 RL |
493 | ERR_raise_data(ERR_LIB_PROV, |
494 | PROV_R_PSS_SALTLEN_TOO_SMALL, | |
495 | "minimum salt length set to %d, but the" | |
496 | "actual salt length is only set to %d", | |
497 | prsactx->min_saltlen, | |
498 | prsactx->saltlen); | |
6f4b7663 RL |
499 | return 0; |
500 | } | |
501 | break; | |
502 | } | |
503 | } | |
504 | if (!setup_tbuf(prsactx)) | |
505 | return 0; | |
506 | if (!RSA_padding_add_PKCS1_PSS_mgf1(prsactx->rsa, | |
507 | prsactx->tbuf, tbs, | |
508 | prsactx->md, prsactx->mgf1_md, | |
509 | prsactx->saltlen)) { | |
510 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
511 | return 0; | |
512 | } | |
513 | ret = RSA_private_encrypt(RSA_size(prsactx->rsa), prsactx->tbuf, | |
514 | sig, prsactx->rsa, RSA_NO_PADDING); | |
515 | clean_tbuf(prsactx); | |
516 | break; | |
517 | ||
518 | default: | |
519 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE, | |
520 | "Only X.931, PKCS#1 v1.5 or PSS padding allowed"); | |
521 | return 0; | |
522 | } | |
523 | } else { | |
524 | ret = RSA_private_encrypt(tbslen, tbs, sig, prsactx->rsa, | |
525 | prsactx->pad_mode); | |
526 | } | |
527 | ||
f844f9eb | 528 | #ifndef FIPS_MODULE |
6f4b7663 RL |
529 | end: |
530 | #endif | |
531 | if (ret <= 0) { | |
532 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | *siglen = ret; | |
537 | return 1; | |
538 | } | |
539 | ||
0ec36bf1 RL |
540 | static int rsa_verify_recover_init(void *vprsactx, void *vrsa) |
541 | { | |
f590a5ea P |
542 | if (!ossl_prov_is_running()) |
543 | return 0; | |
3f699197 | 544 | return rsa_signverify_init(vprsactx, vrsa, EVP_PKEY_OP_VERIFYRECOVER); |
0ec36bf1 RL |
545 | } |
546 | ||
6f4b7663 RL |
547 | static int rsa_verify_recover(void *vprsactx, |
548 | unsigned char *rout, | |
549 | size_t *routlen, | |
550 | size_t routsize, | |
551 | const unsigned char *sig, | |
552 | size_t siglen) | |
553 | { | |
554 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
555 | int ret; | |
556 | ||
f590a5ea P |
557 | if (!ossl_prov_is_running()) |
558 | return 0; | |
559 | ||
6f4b7663 RL |
560 | if (rout == NULL) { |
561 | *routlen = RSA_size(prsactx->rsa); | |
562 | return 1; | |
563 | } | |
564 | ||
565 | if (prsactx->md != NULL) { | |
566 | switch (prsactx->pad_mode) { | |
567 | case RSA_X931_PADDING: | |
568 | if (!setup_tbuf(prsactx)) | |
569 | return 0; | |
570 | ret = RSA_public_decrypt(siglen, sig, prsactx->tbuf, prsactx->rsa, | |
571 | RSA_X931_PADDING); | |
572 | if (ret < 1) { | |
573 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
574 | return 0; | |
575 | } | |
576 | ret--; | |
577 | if (prsactx->tbuf[ret] != RSA_X931_hash_id(prsactx->mdnid)) { | |
578 | ERR_raise(ERR_LIB_PROV, PROV_R_ALGORITHM_MISMATCH); | |
579 | return 0; | |
580 | } | |
581 | if (ret != EVP_MD_size(prsactx->md)) { | |
582 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_LENGTH, | |
583 | "Should be %d, but got %d", | |
584 | EVP_MD_size(prsactx->md), ret); | |
585 | return 0; | |
586 | } | |
587 | ||
588 | *routlen = ret; | |
4f2271d5 SL |
589 | if (rout != prsactx->tbuf) { |
590 | if (routsize < (size_t)ret) { | |
591 | ERR_raise_data(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL, | |
592 | "buffer size is %d, should be %d", | |
593 | routsize, ret); | |
594 | return 0; | |
595 | } | |
596 | memcpy(rout, prsactx->tbuf, ret); | |
6f4b7663 | 597 | } |
6f4b7663 RL |
598 | break; |
599 | ||
600 | case RSA_PKCS1_PADDING: | |
601 | { | |
602 | size_t sltmp; | |
603 | ||
604 | ret = int_rsa_verify(prsactx->mdnid, NULL, 0, rout, &sltmp, | |
605 | sig, siglen, prsactx->rsa); | |
606 | if (ret <= 0) { | |
607 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
608 | return 0; | |
609 | } | |
610 | ret = sltmp; | |
611 | } | |
612 | break; | |
613 | ||
614 | default: | |
615 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE, | |
616 | "Only X.931 or PKCS#1 v1.5 padding allowed"); | |
617 | return 0; | |
618 | } | |
619 | } else { | |
620 | ret = RSA_public_decrypt(siglen, sig, rout, prsactx->rsa, | |
621 | prsactx->pad_mode); | |
622 | if (ret < 0) { | |
623 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
624 | return 0; | |
625 | } | |
626 | } | |
627 | *routlen = ret; | |
628 | return 1; | |
629 | } | |
630 | ||
0ec36bf1 RL |
631 | static int rsa_verify_init(void *vprsactx, void *vrsa) |
632 | { | |
f590a5ea P |
633 | if (!ossl_prov_is_running()) |
634 | return 0; | |
3f699197 | 635 | return rsa_signverify_init(vprsactx, vrsa, EVP_PKEY_OP_VERIFY); |
0ec36bf1 RL |
636 | } |
637 | ||
6f4b7663 RL |
638 | static int rsa_verify(void *vprsactx, const unsigned char *sig, size_t siglen, |
639 | const unsigned char *tbs, size_t tbslen) | |
640 | { | |
641 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
642 | size_t rslen; | |
643 | ||
f590a5ea P |
644 | if (!ossl_prov_is_running()) |
645 | return 0; | |
6f4b7663 RL |
646 | if (prsactx->md != NULL) { |
647 | switch (prsactx->pad_mode) { | |
648 | case RSA_PKCS1_PADDING: | |
649 | if (!RSA_verify(prsactx->mdnid, tbs, tbslen, sig, siglen, | |
650 | prsactx->rsa)) { | |
651 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
652 | return 0; | |
653 | } | |
654 | return 1; | |
655 | case RSA_X931_PADDING: | |
4f2271d5 SL |
656 | if (!setup_tbuf(prsactx)) |
657 | return 0; | |
658 | if (rsa_verify_recover(prsactx, prsactx->tbuf, &rslen, 0, | |
659 | sig, siglen) <= 0) | |
6f4b7663 RL |
660 | return 0; |
661 | break; | |
662 | case RSA_PKCS1_PSS_PADDING: | |
663 | { | |
664 | int ret; | |
665 | size_t mdsize; | |
666 | ||
6f4b7663 RL |
667 | /* |
668 | * We need to check this for the RSA_verify_PKCS1_PSS_mgf1() | |
669 | * call | |
670 | */ | |
671 | mdsize = rsa_get_md_size(prsactx); | |
672 | if (tbslen != mdsize) { | |
673 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_LENGTH, | |
674 | "Should be %d, but got %d", | |
675 | mdsize, tbslen); | |
676 | return 0; | |
677 | } | |
678 | ||
679 | if (!setup_tbuf(prsactx)) | |
680 | return 0; | |
681 | ret = RSA_public_decrypt(siglen, sig, prsactx->tbuf, | |
682 | prsactx->rsa, RSA_NO_PADDING); | |
683 | if (ret <= 0) { | |
684 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
685 | return 0; | |
686 | } | |
687 | ret = RSA_verify_PKCS1_PSS_mgf1(prsactx->rsa, tbs, | |
688 | prsactx->md, prsactx->mgf1_md, | |
689 | prsactx->tbuf, | |
690 | prsactx->saltlen); | |
691 | if (ret <= 0) { | |
692 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
693 | return 0; | |
694 | } | |
695 | return 1; | |
696 | } | |
697 | default: | |
698 | ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE, | |
699 | "Only X.931, PKCS#1 v1.5 or PSS padding allowed"); | |
700 | return 0; | |
701 | } | |
702 | } else { | |
703 | if (!setup_tbuf(prsactx)) | |
704 | return 0; | |
705 | rslen = RSA_public_decrypt(siglen, sig, prsactx->tbuf, prsactx->rsa, | |
706 | prsactx->pad_mode); | |
707 | if (rslen == 0) { | |
708 | ERR_raise(ERR_LIB_PROV, ERR_LIB_RSA); | |
709 | return 0; | |
710 | } | |
711 | } | |
712 | ||
713 | if ((rslen != tbslen) || memcmp(tbs, prsactx->tbuf, rslen)) | |
714 | return 0; | |
715 | ||
716 | return 1; | |
717 | } | |
718 | ||
719 | static int rsa_digest_signverify_init(void *vprsactx, const char *mdname, | |
2c6094ba | 720 | void *vrsa, int operation) |
6f4b7663 RL |
721 | { |
722 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
723 | ||
f590a5ea P |
724 | if (!ossl_prov_is_running()) |
725 | return 0; | |
726 | ||
db1319b7 SL |
727 | if (prsactx != NULL) |
728 | prsactx->flag_allow_md = 0; | |
3f699197 | 729 | if (!rsa_signverify_init(vprsactx, vrsa, operation) |
2d553660 | 730 | || !rsa_setup_md(prsactx, mdname, NULL)) /* TODO RL */ |
6f4b7663 RL |
731 | return 0; |
732 | ||
733 | prsactx->mdctx = EVP_MD_CTX_new(); | |
2d553660 RL |
734 | if (prsactx->mdctx == NULL) { |
735 | ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); | |
6f4b7663 | 736 | goto error; |
2d553660 | 737 | } |
6f4b7663 RL |
738 | |
739 | if (!EVP_DigestInit_ex(prsactx->mdctx, prsactx->md, NULL)) | |
740 | goto error; | |
741 | ||
742 | return 1; | |
743 | ||
744 | error: | |
745 | EVP_MD_CTX_free(prsactx->mdctx); | |
746 | EVP_MD_free(prsactx->md); | |
747 | prsactx->mdctx = NULL; | |
748 | prsactx->md = NULL; | |
749 | return 0; | |
750 | } | |
751 | ||
0ec36bf1 RL |
752 | static int rsa_digest_signverify_update(void *vprsactx, |
753 | const unsigned char *data, | |
754 | size_t datalen) | |
6f4b7663 RL |
755 | { |
756 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
757 | ||
758 | if (prsactx == NULL || prsactx->mdctx == NULL) | |
759 | return 0; | |
760 | ||
761 | return EVP_DigestUpdate(prsactx->mdctx, data, datalen); | |
762 | } | |
763 | ||
0ec36bf1 | 764 | static int rsa_digest_sign_init(void *vprsactx, const char *mdname, |
2d553660 | 765 | void *vrsa) |
0ec36bf1 | 766 | { |
f590a5ea P |
767 | if (!ossl_prov_is_running()) |
768 | return 0; | |
2d553660 | 769 | return rsa_digest_signverify_init(vprsactx, mdname, vrsa, |
0ec36bf1 RL |
770 | EVP_PKEY_OP_SIGN); |
771 | } | |
772 | ||
773 | static int rsa_digest_sign_final(void *vprsactx, unsigned char *sig, | |
774 | size_t *siglen, size_t sigsize) | |
6f4b7663 RL |
775 | { |
776 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
777 | unsigned char digest[EVP_MAX_MD_SIZE]; | |
778 | unsigned int dlen = 0; | |
779 | ||
f590a5ea | 780 | if (!ossl_prov_is_running() || prsactx == NULL) |
51bba73e | 781 | return 0; |
6f4b7663 | 782 | prsactx->flag_allow_md = 1; |
51bba73e | 783 | if (prsactx->mdctx == NULL) |
6f4b7663 | 784 | return 0; |
6f4b7663 RL |
785 | /* |
786 | * If sig is NULL then we're just finding out the sig size. Other fields | |
787 | * are ignored. Defer to rsa_sign. | |
788 | */ | |
789 | if (sig != NULL) { | |
790 | /* | |
3f699197 SL |
791 | * The digests used here are all known (see rsa_get_md_nid()), so they |
792 | * should not exceed the internal buffer size of EVP_MAX_MD_SIZE. | |
6f4b7663 RL |
793 | */ |
794 | if (!EVP_DigestFinal_ex(prsactx->mdctx, digest, &dlen)) | |
795 | return 0; | |
796 | } | |
797 | ||
798 | return rsa_sign(vprsactx, sig, siglen, sigsize, digest, (size_t)dlen); | |
799 | } | |
800 | ||
0ec36bf1 | 801 | static int rsa_digest_verify_init(void *vprsactx, const char *mdname, |
2d553660 | 802 | void *vrsa) |
0ec36bf1 | 803 | { |
f590a5ea P |
804 | if (!ossl_prov_is_running()) |
805 | return 0; | |
2d553660 | 806 | return rsa_digest_signverify_init(vprsactx, mdname, vrsa, |
0ec36bf1 RL |
807 | EVP_PKEY_OP_VERIFY); |
808 | } | |
6f4b7663 RL |
809 | |
810 | int rsa_digest_verify_final(void *vprsactx, const unsigned char *sig, | |
811 | size_t siglen) | |
812 | { | |
813 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
814 | unsigned char digest[EVP_MAX_MD_SIZE]; | |
815 | unsigned int dlen = 0; | |
816 | ||
f590a5ea P |
817 | if (!ossl_prov_is_running()) |
818 | return 0; | |
819 | ||
db1319b7 SL |
820 | if (prsactx == NULL) |
821 | return 0; | |
6f4b7663 | 822 | prsactx->flag_allow_md = 1; |
db1319b7 | 823 | if (prsactx->mdctx == NULL) |
6f4b7663 RL |
824 | return 0; |
825 | ||
826 | /* | |
3f699197 SL |
827 | * The digests used here are all known (see rsa_get_md_nid()), so they |
828 | * should not exceed the internal buffer size of EVP_MAX_MD_SIZE. | |
6f4b7663 RL |
829 | */ |
830 | if (!EVP_DigestFinal_ex(prsactx->mdctx, digest, &dlen)) | |
831 | return 0; | |
832 | ||
833 | return rsa_verify(vprsactx, sig, siglen, digest, (size_t)dlen); | |
834 | } | |
835 | ||
836 | static void rsa_freectx(void *vprsactx) | |
837 | { | |
838 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
839 | ||
840 | if (prsactx == NULL) | |
841 | return; | |
842 | ||
6f4b7663 RL |
843 | EVP_MD_CTX_free(prsactx->mdctx); |
844 | EVP_MD_free(prsactx->md); | |
845 | EVP_MD_free(prsactx->mgf1_md); | |
2c6094ba | 846 | OPENSSL_free(prsactx->propq); |
6f4b7663 | 847 | free_tbuf(prsactx); |
fdf6118b | 848 | RSA_free(prsactx->rsa); |
6f4b7663 | 849 | |
26c5ea8f | 850 | OPENSSL_clear_free(prsactx, sizeof(*prsactx)); |
6f4b7663 RL |
851 | } |
852 | ||
853 | static void *rsa_dupctx(void *vprsactx) | |
854 | { | |
855 | PROV_RSA_CTX *srcctx = (PROV_RSA_CTX *)vprsactx; | |
856 | PROV_RSA_CTX *dstctx; | |
857 | ||
f590a5ea P |
858 | if (!ossl_prov_is_running()) |
859 | return NULL; | |
860 | ||
6f4b7663 | 861 | dstctx = OPENSSL_zalloc(sizeof(*srcctx)); |
2d553660 RL |
862 | if (dstctx == NULL) { |
863 | ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); | |
6f4b7663 | 864 | return NULL; |
2d553660 | 865 | } |
6f4b7663 RL |
866 | |
867 | *dstctx = *srcctx; | |
868 | dstctx->rsa = NULL; | |
869 | dstctx->md = NULL; | |
870 | dstctx->mdctx = NULL; | |
871 | dstctx->tbuf = NULL; | |
872 | ||
873 | if (srcctx->rsa != NULL && !RSA_up_ref(srcctx->rsa)) | |
874 | goto err; | |
875 | dstctx->rsa = srcctx->rsa; | |
876 | ||
877 | if (srcctx->md != NULL && !EVP_MD_up_ref(srcctx->md)) | |
878 | goto err; | |
879 | dstctx->md = srcctx->md; | |
880 | ||
881 | if (srcctx->mgf1_md != NULL && !EVP_MD_up_ref(srcctx->mgf1_md)) | |
882 | goto err; | |
883 | dstctx->mgf1_md = srcctx->mgf1_md; | |
884 | ||
885 | if (srcctx->mdctx != NULL) { | |
886 | dstctx->mdctx = EVP_MD_CTX_new(); | |
887 | if (dstctx->mdctx == NULL | |
888 | || !EVP_MD_CTX_copy_ex(dstctx->mdctx, srcctx->mdctx)) | |
889 | goto err; | |
890 | } | |
891 | ||
892 | return dstctx; | |
893 | err: | |
894 | rsa_freectx(dstctx); | |
895 | return NULL; | |
896 | } | |
897 | ||
898 | static int rsa_get_ctx_params(void *vprsactx, OSSL_PARAM *params) | |
899 | { | |
900 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
901 | OSSL_PARAM *p; | |
902 | ||
903 | if (prsactx == NULL || params == NULL) | |
904 | return 0; | |
905 | ||
906 | p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_ALGORITHM_ID); | |
907 | if (p != NULL | |
908 | && !OSSL_PARAM_set_octet_string(p, prsactx->aid, prsactx->aid_len)) | |
909 | return 0; | |
910 | ||
911 | p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_PAD_MODE); | |
912 | if (p != NULL) | |
913 | switch (p->data_type) { | |
914 | case OSSL_PARAM_INTEGER: | |
915 | if (!OSSL_PARAM_set_int(p, prsactx->pad_mode)) | |
916 | return 0; | |
917 | break; | |
918 | case OSSL_PARAM_UTF8_STRING: | |
919 | { | |
920 | int i; | |
921 | const char *word = NULL; | |
922 | ||
923 | for (i = 0; padding_item[i].id != 0; i++) { | |
924 | if (prsactx->pad_mode == (int)padding_item[i].id) { | |
925 | word = padding_item[i].ptr; | |
926 | break; | |
927 | } | |
928 | } | |
929 | ||
930 | if (word != NULL) { | |
931 | if (!OSSL_PARAM_set_utf8_string(p, word)) | |
932 | return 0; | |
933 | } else { | |
934 | ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR); | |
935 | } | |
936 | } | |
937 | break; | |
938 | default: | |
939 | return 0; | |
940 | } | |
941 | ||
942 | p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_DIGEST); | |
943 | if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->mdname)) | |
944 | return 0; | |
945 | ||
946 | p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_MGF1_DIGEST); | |
947 | if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->mgf1_mdname)) | |
948 | return 0; | |
949 | ||
950 | p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_PSS_SALTLEN); | |
951 | if (p != NULL) { | |
952 | if (p->data_type == OSSL_PARAM_INTEGER) { | |
953 | if (!OSSL_PARAM_set_int(p, prsactx->saltlen)) | |
954 | return 0; | |
955 | } else if (p->data_type == OSSL_PARAM_UTF8_STRING) { | |
b8086652 SL |
956 | const char *value = NULL; |
957 | ||
6f4b7663 RL |
958 | switch (prsactx->saltlen) { |
959 | case RSA_PSS_SALTLEN_DIGEST: | |
b8086652 | 960 | value = OSSL_PKEY_RSA_PSS_SALT_LEN_DIGEST; |
6f4b7663 RL |
961 | break; |
962 | case RSA_PSS_SALTLEN_MAX: | |
b8086652 | 963 | value = OSSL_PKEY_RSA_PSS_SALT_LEN_MAX; |
6f4b7663 RL |
964 | break; |
965 | case RSA_PSS_SALTLEN_AUTO: | |
b8086652 | 966 | value = OSSL_PKEY_RSA_PSS_SALT_LEN_AUTO; |
6f4b7663 RL |
967 | break; |
968 | default: | |
b8086652 SL |
969 | { |
970 | int len = BIO_snprintf(p->data, p->data_size, "%d", | |
971 | prsactx->saltlen); | |
972 | ||
973 | if (len <= 0) | |
974 | return 0; | |
975 | p->return_size = len; | |
976 | break; | |
977 | } | |
6f4b7663 | 978 | } |
b8086652 SL |
979 | if (value != NULL |
980 | && !OSSL_PARAM_set_utf8_string(p, value)) | |
981 | return 0; | |
6f4b7663 RL |
982 | } |
983 | } | |
984 | ||
985 | return 1; | |
986 | } | |
987 | ||
988 | static const OSSL_PARAM known_gettable_ctx_params[] = { | |
989 | OSSL_PARAM_octet_string(OSSL_SIGNATURE_PARAM_ALGORITHM_ID, NULL, 0), | |
990 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PAD_MODE, NULL, 0), | |
991 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0), | |
992 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_DIGEST, NULL, 0), | |
993 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, NULL, 0), | |
994 | OSSL_PARAM_END | |
995 | }; | |
996 | ||
3f699197 | 997 | static const OSSL_PARAM *rsa_gettable_ctx_params(ossl_unused void *vctx) |
6f4b7663 RL |
998 | { |
999 | return known_gettable_ctx_params; | |
1000 | } | |
1001 | ||
1002 | static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[]) | |
1003 | { | |
1004 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
1005 | const OSSL_PARAM *p; | |
1006 | ||
1007 | if (prsactx == NULL || params == NULL) | |
1008 | return 0; | |
1009 | ||
1010 | p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_DIGEST); | |
1011 | /* Not allowed during certain operations */ | |
1012 | if (p != NULL && !prsactx->flag_allow_md) | |
1013 | return 0; | |
1014 | if (p != NULL) { | |
1015 | char mdname[OSSL_MAX_NAME_SIZE] = "", *pmdname = mdname; | |
1016 | char mdprops[OSSL_MAX_PROPQUERY_SIZE] = "", *pmdprops = mdprops; | |
1017 | const OSSL_PARAM *propsp = | |
1018 | OSSL_PARAM_locate_const(params, | |
1019 | OSSL_SIGNATURE_PARAM_PROPERTIES); | |
1020 | ||
1021 | if (!OSSL_PARAM_get_utf8_string(p, &pmdname, sizeof(mdname))) | |
1022 | return 0; | |
2c6094ba RL |
1023 | |
1024 | if (propsp == NULL) | |
1025 | pmdprops = NULL; | |
1026 | else if (!OSSL_PARAM_get_utf8_string(propsp, | |
1027 | &pmdprops, sizeof(mdprops))) | |
6f4b7663 RL |
1028 | return 0; |
1029 | ||
6f4b7663 RL |
1030 | if (rsa_pss_restricted(prsactx)) { |
1031 | /* TODO(3.0) figure out what to do for prsactx->md == NULL */ | |
1032 | if (prsactx->md == NULL || EVP_MD_is_a(prsactx->md, mdname)) | |
1033 | return 1; | |
1034 | ERR_raise(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED); | |
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | /* non-PSS code follows */ | |
2c6094ba | 1039 | if (!rsa_setup_md(prsactx, mdname, pmdprops)) |
6f4b7663 RL |
1040 | return 0; |
1041 | } | |
1042 | ||
1043 | p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_PAD_MODE); | |
1044 | if (p != NULL) { | |
1045 | int pad_mode = 0; | |
0ec36bf1 | 1046 | const char *err_extra_text = NULL; |
6f4b7663 RL |
1047 | |
1048 | switch (p->data_type) { | |
1049 | case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */ | |
1050 | if (!OSSL_PARAM_get_int(p, &pad_mode)) | |
1051 | return 0; | |
1052 | break; | |
1053 | case OSSL_PARAM_UTF8_STRING: | |
1054 | { | |
1055 | int i; | |
1056 | ||
1057 | if (p->data == NULL) | |
1058 | return 0; | |
1059 | ||
1060 | for (i = 0; padding_item[i].id != 0; i++) { | |
1061 | if (strcmp(p->data, padding_item[i].ptr) == 0) { | |
1062 | pad_mode = padding_item[i].id; | |
1063 | break; | |
1064 | } | |
1065 | } | |
1066 | } | |
1067 | break; | |
1068 | default: | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | switch (pad_mode) { | |
1073 | case RSA_PKCS1_OAEP_PADDING: | |
1074 | /* | |
1075 | * OAEP padding is for asymmetric cipher only so is not compatible | |
1076 | * with signature use. | |
1077 | */ | |
0ec36bf1 RL |
1078 | err_extra_text = "OAEP padding not allowed for signing / verifying"; |
1079 | goto bad_pad; | |
6f4b7663 | 1080 | case RSA_PKCS1_PSS_PADDING: |
0ec36bf1 RL |
1081 | if ((prsactx->operation |
1082 | & (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)) == 0) { | |
1083 | err_extra_text = | |
1084 | "PSS padding only allowed for sign and verify operations"; | |
1085 | goto bad_pad; | |
1086 | } | |
1087 | if (prsactx->md == NULL | |
3f699197 | 1088 | && !rsa_setup_md(prsactx, RSA_DEFAULT_DIGEST_NAME, NULL)) { |
0ec36bf1 RL |
1089 | return 0; |
1090 | } | |
1091 | break; | |
6f4b7663 | 1092 | case RSA_PKCS1_PADDING: |
0ec36bf1 RL |
1093 | err_extra_text = "PKCS#1 padding not allowed with RSA-PSS"; |
1094 | goto cont; | |
6f4b7663 | 1095 | case RSA_SSLV23_PADDING: |
0ec36bf1 RL |
1096 | err_extra_text = "SSLv3 padding not allowed with RSA-PSS"; |
1097 | goto cont; | |
6f4b7663 | 1098 | case RSA_NO_PADDING: |
0ec36bf1 RL |
1099 | err_extra_text = "No padding not allowed with RSA-PSS"; |
1100 | goto cont; | |
6f4b7663 | 1101 | case RSA_X931_PADDING: |
0ec36bf1 | 1102 | err_extra_text = "X.931 padding not allowed with RSA-PSS"; |
6f4b7663 | 1103 | cont: |
2d553660 RL |
1104 | if (RSA_test_flags(prsactx->rsa, |
1105 | RSA_FLAG_TYPE_MASK) == RSA_FLAG_TYPE_RSA) | |
0ec36bf1 RL |
1106 | break; |
1107 | /* FALLTHRU */ | |
6f4b7663 | 1108 | default: |
0ec36bf1 RL |
1109 | bad_pad: |
1110 | if (err_extra_text == NULL) | |
1111 | ERR_raise(ERR_LIB_PROV, | |
1112 | PROV_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE); | |
1113 | else | |
1114 | ERR_raise_data(ERR_LIB_PROV, | |
1115 | PROV_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE, | |
1116 | err_extra_text); | |
6f4b7663 RL |
1117 | return 0; |
1118 | } | |
0ec36bf1 RL |
1119 | if (!rsa_check_padding(prsactx->mdnid, pad_mode)) |
1120 | return 0; | |
6f4b7663 RL |
1121 | prsactx->pad_mode = pad_mode; |
1122 | } | |
1123 | ||
1124 | p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_PSS_SALTLEN); | |
1125 | if (p != NULL) { | |
1126 | int saltlen; | |
1127 | ||
1128 | if (prsactx->pad_mode != RSA_PKCS1_PSS_PADDING) { | |
1129 | ERR_raise_data(ERR_LIB_PROV, PROV_R_NOT_SUPPORTED, | |
1130 | "PSS saltlen can only be specified if " | |
1131 | "PSS padding has been specified first"); | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | switch (p->data_type) { | |
1136 | case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */ | |
1137 | if (!OSSL_PARAM_get_int(p, &saltlen)) | |
1138 | return 0; | |
1139 | break; | |
1140 | case OSSL_PARAM_UTF8_STRING: | |
b8086652 | 1141 | if (strcmp(p->data, OSSL_PKEY_RSA_PSS_SALT_LEN_DIGEST) == 0) |
6f4b7663 | 1142 | saltlen = RSA_PSS_SALTLEN_DIGEST; |
b8086652 | 1143 | else if (strcmp(p->data, OSSL_PKEY_RSA_PSS_SALT_LEN_MAX) == 0) |
6f4b7663 | 1144 | saltlen = RSA_PSS_SALTLEN_MAX; |
b8086652 | 1145 | else if (strcmp(p->data, OSSL_PKEY_RSA_PSS_SALT_LEN_AUTO) == 0) |
6f4b7663 RL |
1146 | saltlen = RSA_PSS_SALTLEN_AUTO; |
1147 | else | |
1148 | saltlen = atoi(p->data); | |
1149 | break; | |
1150 | default: | |
1151 | return 0; | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * RSA_PSS_SALTLEN_MAX seems curiously named in this check. | |
1156 | * Contrary to what it's name suggests, it's the currently | |
1157 | * lowest saltlen number possible. | |
1158 | */ | |
1159 | if (saltlen < RSA_PSS_SALTLEN_MAX) { | |
1160 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_PSS_SALTLEN); | |
1161 | return 0; | |
1162 | } | |
1163 | ||
0ec36bf1 | 1164 | if (rsa_pss_restricted(prsactx)) { |
6ce6ad39 | 1165 | switch (saltlen) { |
0ec36bf1 RL |
1166 | case RSA_PSS_SALTLEN_AUTO: |
1167 | if (prsactx->operation == EVP_PKEY_OP_VERIFY) { | |
1168 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_PSS_SALTLEN); | |
1169 | return 0; | |
1170 | } | |
1171 | break; | |
1172 | case RSA_PSS_SALTLEN_DIGEST: | |
1173 | if (prsactx->min_saltlen > EVP_MD_size(prsactx->md)) { | |
1174 | ERR_raise_data(ERR_LIB_PROV, | |
1175 | PROV_R_PSS_SALTLEN_TOO_SMALL, | |
1176 | "Should be more than %d, but would be " | |
1177 | "set to match digest size (%d)", | |
1178 | prsactx->min_saltlen, | |
1179 | EVP_MD_size(prsactx->md)); | |
1180 | return 0; | |
1181 | } | |
6ce6ad39 | 1182 | break; |
0ec36bf1 RL |
1183 | default: |
1184 | if (saltlen >= 0 && saltlen < prsactx->min_saltlen) { | |
1185 | ERR_raise_data(ERR_LIB_PROV, | |
1186 | PROV_R_PSS_SALTLEN_TOO_SMALL, | |
1187 | "Should be more than %d, " | |
1188 | "but would be set to %d", | |
1189 | prsactx->min_saltlen, saltlen); | |
1190 | return 0; | |
1191 | } | |
1192 | } | |
1193 | } | |
1194 | ||
6f4b7663 RL |
1195 | prsactx->saltlen = saltlen; |
1196 | } | |
1197 | ||
1198 | p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_MGF1_DIGEST); | |
1199 | if (p != NULL) { | |
1200 | char mdname[OSSL_MAX_NAME_SIZE] = "", *pmdname = mdname; | |
1201 | char mdprops[OSSL_MAX_PROPQUERY_SIZE] = "", *pmdprops = mdprops; | |
1202 | const OSSL_PARAM *propsp = | |
1203 | OSSL_PARAM_locate_const(params, | |
1204 | OSSL_SIGNATURE_PARAM_MGF1_PROPERTIES); | |
1205 | ||
1206 | if (!OSSL_PARAM_get_utf8_string(p, &pmdname, sizeof(mdname))) | |
1207 | return 0; | |
2c6094ba RL |
1208 | |
1209 | if (propsp == NULL) | |
1210 | pmdprops = NULL; | |
1211 | else if (!OSSL_PARAM_get_utf8_string(propsp, | |
1212 | &pmdprops, sizeof(mdprops))) | |
6f4b7663 RL |
1213 | return 0; |
1214 | ||
1215 | if (prsactx->pad_mode != RSA_PKCS1_PSS_PADDING) { | |
1216 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_MGF1_MD); | |
1217 | return 0; | |
1218 | } | |
1219 | ||
6f4b7663 | 1220 | if (rsa_pss_restricted(prsactx)) { |
0ec36bf1 | 1221 | /* TODO(3.0) figure out what to do for prsactx->mgf1_md == NULL */ |
6f4b7663 RL |
1222 | if (prsactx->mgf1_md == NULL |
1223 | || EVP_MD_is_a(prsactx->mgf1_md, mdname)) | |
1224 | return 1; | |
1225 | ERR_raise(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED); | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | /* non-PSS code follows */ | |
2c6094ba | 1230 | if (!rsa_setup_mgf1_md(prsactx, mdname, pmdprops)) |
6f4b7663 RL |
1231 | return 0; |
1232 | } | |
1233 | ||
1234 | return 1; | |
1235 | } | |
1236 | ||
1237 | static const OSSL_PARAM known_settable_ctx_params[] = { | |
1238 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PAD_MODE, NULL, 0), | |
1239 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0), | |
1240 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PROPERTIES, NULL, 0), | |
1241 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_DIGEST, NULL, 0), | |
1242 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_PROPERTIES, NULL, 0), | |
1243 | OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, NULL, 0), | |
1244 | OSSL_PARAM_END | |
1245 | }; | |
1246 | ||
3f699197 | 1247 | static const OSSL_PARAM *rsa_settable_ctx_params(void *provctx) |
6f4b7663 RL |
1248 | { |
1249 | /* | |
1250 | * TODO(3.0): Should this function return a different set of settable ctx | |
1251 | * params if the ctx is being used for a DigestSign/DigestVerify? In that | |
1252 | * case it is not allowed to set the digest size/digest name because the | |
1253 | * digest is explicitly set as part of the init. | |
1254 | */ | |
1255 | return known_settable_ctx_params; | |
1256 | } | |
1257 | ||
1258 | static int rsa_get_ctx_md_params(void *vprsactx, OSSL_PARAM *params) | |
1259 | { | |
1260 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
1261 | ||
1262 | if (prsactx->mdctx == NULL) | |
1263 | return 0; | |
1264 | ||
1265 | return EVP_MD_CTX_get_params(prsactx->mdctx, params); | |
1266 | } | |
1267 | ||
1268 | static const OSSL_PARAM *rsa_gettable_ctx_md_params(void *vprsactx) | |
1269 | { | |
1270 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
1271 | ||
1272 | if (prsactx->md == NULL) | |
1273 | return 0; | |
1274 | ||
1275 | return EVP_MD_gettable_ctx_params(prsactx->md); | |
1276 | } | |
1277 | ||
1278 | static int rsa_set_ctx_md_params(void *vprsactx, const OSSL_PARAM params[]) | |
1279 | { | |
1280 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
1281 | ||
1282 | if (prsactx->mdctx == NULL) | |
1283 | return 0; | |
1284 | ||
1285 | return EVP_MD_CTX_set_params(prsactx->mdctx, params); | |
1286 | } | |
1287 | ||
1288 | static const OSSL_PARAM *rsa_settable_ctx_md_params(void *vprsactx) | |
1289 | { | |
1290 | PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx; | |
1291 | ||
1292 | if (prsactx->md == NULL) | |
1293 | return 0; | |
1294 | ||
1295 | return EVP_MD_settable_ctx_params(prsactx->md); | |
1296 | } | |
1297 | ||
1298 | const OSSL_DISPATCH rsa_signature_functions[] = { | |
1299 | { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))rsa_newctx }, | |
0ec36bf1 | 1300 | { OSSL_FUNC_SIGNATURE_SIGN_INIT, (void (*)(void))rsa_sign_init }, |
6f4b7663 | 1301 | { OSSL_FUNC_SIGNATURE_SIGN, (void (*)(void))rsa_sign }, |
0ec36bf1 | 1302 | { OSSL_FUNC_SIGNATURE_VERIFY_INIT, (void (*)(void))rsa_verify_init }, |
6f4b7663 | 1303 | { OSSL_FUNC_SIGNATURE_VERIFY, (void (*)(void))rsa_verify }, |
0ec36bf1 RL |
1304 | { OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT, |
1305 | (void (*)(void))rsa_verify_recover_init }, | |
1306 | { OSSL_FUNC_SIGNATURE_VERIFY_RECOVER, | |
1307 | (void (*)(void))rsa_verify_recover }, | |
6f4b7663 | 1308 | { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT, |
0ec36bf1 | 1309 | (void (*)(void))rsa_digest_sign_init }, |
6f4b7663 RL |
1310 | { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE, |
1311 | (void (*)(void))rsa_digest_signverify_update }, | |
1312 | { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL, | |
1313 | (void (*)(void))rsa_digest_sign_final }, | |
1314 | { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT, | |
0ec36bf1 | 1315 | (void (*)(void))rsa_digest_verify_init }, |
6f4b7663 RL |
1316 | { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE, |
1317 | (void (*)(void))rsa_digest_signverify_update }, | |
1318 | { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL, | |
1319 | (void (*)(void))rsa_digest_verify_final }, | |
1320 | { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))rsa_freectx }, | |
1321 | { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))rsa_dupctx }, | |
1322 | { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, (void (*)(void))rsa_get_ctx_params }, | |
1323 | { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS, | |
1324 | (void (*)(void))rsa_gettable_ctx_params }, | |
1325 | { OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS, (void (*)(void))rsa_set_ctx_params }, | |
1326 | { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS, | |
1327 | (void (*)(void))rsa_settable_ctx_params }, | |
1328 | { OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS, | |
1329 | (void (*)(void))rsa_get_ctx_md_params }, | |
1330 | { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS, | |
1331 | (void (*)(void))rsa_gettable_ctx_md_params }, | |
1332 | { OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS, | |
1333 | (void (*)(void))rsa_set_ctx_md_params }, | |
1334 | { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS, | |
1335 | (void (*)(void))rsa_settable_ctx_md_params }, | |
1336 | { 0, NULL } | |
1337 | }; |