| 1 | /*
|
|---|
| 2 | * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
|
|---|
| 3 | *
|
|---|
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
|
|---|
| 5 | * this file except in compliance with the License. You can obtain a copy
|
|---|
| 6 | * in the file LICENSE in the source distribution or at
|
|---|
| 7 | * https://www.openssl.org/source/license.html
|
|---|
| 8 | */
|
|---|
| 9 |
|
|---|
| 10 | #include <stdio.h>
|
|---|
| 11 | #include "internal/cryptlib.h"
|
|---|
| 12 | #include <openssl/asn1t.h>
|
|---|
| 13 | #include <openssl/x509.h>
|
|---|
| 14 | #include <openssl/bn.h>
|
|---|
| 15 | #include <openssl/cms.h>
|
|---|
| 16 | #include "crypto/asn1.h"
|
|---|
| 17 | #include "crypto/evp.h"
|
|---|
| 18 | #include "rsa_local.h"
|
|---|
| 19 |
|
|---|
| 20 | #ifndef OPENSSL_NO_CMS
|
|---|
| 21 | static int rsa_cms_sign(CMS_SignerInfo *si);
|
|---|
| 22 | static int rsa_cms_verify(CMS_SignerInfo *si);
|
|---|
| 23 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
|
|---|
| 24 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
|
|---|
| 25 | #endif
|
|---|
| 26 |
|
|---|
| 27 | static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg);
|
|---|
| 28 |
|
|---|
| 29 | /* Set any parameters associated with pkey */
|
|---|
| 30 | static int rsa_param_encode(const EVP_PKEY *pkey,
|
|---|
| 31 | ASN1_STRING **pstr, int *pstrtype)
|
|---|
| 32 | {
|
|---|
| 33 | const RSA *rsa = pkey->pkey.rsa;
|
|---|
| 34 |
|
|---|
| 35 | *pstr = NULL;
|
|---|
| 36 | /* If RSA it's just NULL type */
|
|---|
| 37 | if (pkey->ameth->pkey_id != EVP_PKEY_RSA_PSS) {
|
|---|
| 38 | *pstrtype = V_ASN1_NULL;
|
|---|
| 39 | return 1;
|
|---|
| 40 | }
|
|---|
| 41 | /* If no PSS parameters we omit parameters entirely */
|
|---|
| 42 | if (rsa->pss == NULL) {
|
|---|
| 43 | *pstrtype = V_ASN1_UNDEF;
|
|---|
| 44 | return 1;
|
|---|
| 45 | }
|
|---|
| 46 | /* Encode PSS parameters */
|
|---|
| 47 | if (ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr) == NULL)
|
|---|
| 48 | return 0;
|
|---|
| 49 |
|
|---|
| 50 | *pstrtype = V_ASN1_SEQUENCE;
|
|---|
| 51 | return 1;
|
|---|
| 52 | }
|
|---|
| 53 | /* Decode any parameters and set them in RSA structure */
|
|---|
| 54 | static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
|
|---|
| 55 | {
|
|---|
| 56 | const ASN1_OBJECT *algoid;
|
|---|
| 57 | const void *algp;
|
|---|
| 58 | int algptype;
|
|---|
| 59 |
|
|---|
| 60 | X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
|
|---|
| 61 | if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS)
|
|---|
| 62 | return 1;
|
|---|
| 63 | if (algptype == V_ASN1_UNDEF)
|
|---|
| 64 | return 1;
|
|---|
| 65 | if (algptype != V_ASN1_SEQUENCE) {
|
|---|
| 66 | RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
|
|---|
| 67 | return 0;
|
|---|
| 68 | }
|
|---|
| 69 | rsa->pss = rsa_pss_decode(alg);
|
|---|
| 70 | if (rsa->pss == NULL)
|
|---|
| 71 | return 0;
|
|---|
| 72 | return 1;
|
|---|
| 73 | }
|
|---|
| 74 |
|
|---|
| 75 | static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
|
|---|
| 76 | {
|
|---|
| 77 | unsigned char *penc = NULL;
|
|---|
| 78 | int penclen;
|
|---|
| 79 | ASN1_STRING *str;
|
|---|
| 80 | int strtype;
|
|---|
| 81 |
|
|---|
| 82 | if (!rsa_param_encode(pkey, &str, &strtype))
|
|---|
| 83 | return 0;
|
|---|
| 84 | penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
|
|---|
| 85 | if (penclen <= 0)
|
|---|
| 86 | return 0;
|
|---|
| 87 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
|
|---|
| 88 | strtype, str, penc, penclen))
|
|---|
| 89 | return 1;
|
|---|
| 90 |
|
|---|
| 91 | OPENSSL_free(penc);
|
|---|
| 92 | return 0;
|
|---|
| 93 | }
|
|---|
| 94 |
|
|---|
| 95 | static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
|
|---|
| 96 | {
|
|---|
| 97 | const unsigned char *p;
|
|---|
| 98 | int pklen;
|
|---|
| 99 | X509_ALGOR *alg;
|
|---|
| 100 | RSA *rsa = NULL;
|
|---|
| 101 |
|
|---|
| 102 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
|
|---|
| 103 | return 0;
|
|---|
| 104 | if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
|
|---|
| 105 | RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
|
|---|
| 106 | return 0;
|
|---|
| 107 | }
|
|---|
| 108 | if (!rsa_param_decode(rsa, alg)) {
|
|---|
| 109 | RSA_free(rsa);
|
|---|
| 110 | return 0;
|
|---|
| 111 | }
|
|---|
| 112 | if (!EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa)) {
|
|---|
| 113 | RSA_free(rsa);
|
|---|
| 114 | return 0;
|
|---|
| 115 | }
|
|---|
| 116 | return 1;
|
|---|
| 117 | }
|
|---|
| 118 |
|
|---|
| 119 | static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
|
|---|
| 120 | {
|
|---|
| 121 | /*
|
|---|
| 122 | * Don't check the public/private key, this is mostly for smart
|
|---|
| 123 | * cards.
|
|---|
| 124 | */
|
|---|
| 125 | if (((RSA_flags(a->pkey.rsa) & RSA_METHOD_FLAG_NO_CHECK))
|
|---|
| 126 | || (RSA_flags(b->pkey.rsa) & RSA_METHOD_FLAG_NO_CHECK)) {
|
|---|
| 127 | return 1;
|
|---|
| 128 | }
|
|---|
| 129 |
|
|---|
| 130 | if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
|
|---|
| 131 | || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
|
|---|
| 132 | return 0;
|
|---|
| 133 | return 1;
|
|---|
| 134 | }
|
|---|
| 135 |
|
|---|
| 136 | static int old_rsa_priv_decode(EVP_PKEY *pkey,
|
|---|
| 137 | const unsigned char **pder, int derlen)
|
|---|
| 138 | {
|
|---|
| 139 | RSA *rsa;
|
|---|
| 140 |
|
|---|
| 141 | if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
|
|---|
| 142 | RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
|
|---|
| 143 | return 0;
|
|---|
| 144 | }
|
|---|
| 145 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
|
|---|
| 146 | return 1;
|
|---|
| 147 | }
|
|---|
| 148 |
|
|---|
| 149 | static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
|
|---|
| 150 | {
|
|---|
| 151 | return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
|
|---|
| 152 | }
|
|---|
| 153 |
|
|---|
| 154 | static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
|
|---|
| 155 | {
|
|---|
| 156 | unsigned char *rk = NULL;
|
|---|
| 157 | int rklen;
|
|---|
| 158 | ASN1_STRING *str;
|
|---|
| 159 | int strtype;
|
|---|
| 160 |
|
|---|
| 161 | if (!rsa_param_encode(pkey, &str, &strtype))
|
|---|
| 162 | return 0;
|
|---|
| 163 | rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
|
|---|
| 164 |
|
|---|
| 165 | if (rklen <= 0) {
|
|---|
| 166 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
|
|---|
| 167 | ASN1_STRING_free(str);
|
|---|
| 168 | return 0;
|
|---|
| 169 | }
|
|---|
| 170 |
|
|---|
| 171 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
|
|---|
| 172 | strtype, str, rk, rklen)) {
|
|---|
| 173 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
|
|---|
| 174 | ASN1_STRING_free(str);
|
|---|
| 175 | return 0;
|
|---|
| 176 | }
|
|---|
| 177 |
|
|---|
| 178 | return 1;
|
|---|
| 179 | }
|
|---|
| 180 |
|
|---|
| 181 | static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
|
|---|
| 182 | {
|
|---|
| 183 | const unsigned char *p;
|
|---|
| 184 | RSA *rsa;
|
|---|
| 185 | int pklen;
|
|---|
| 186 | const X509_ALGOR *alg;
|
|---|
| 187 |
|
|---|
| 188 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
|
|---|
| 189 | return 0;
|
|---|
| 190 | rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
|
|---|
| 191 | if (rsa == NULL) {
|
|---|
| 192 | RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
|
|---|
| 193 | return 0;
|
|---|
| 194 | }
|
|---|
| 195 | if (!rsa_param_decode(rsa, alg)) {
|
|---|
| 196 | RSA_free(rsa);
|
|---|
| 197 | return 0;
|
|---|
| 198 | }
|
|---|
| 199 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
|
|---|
| 200 | return 1;
|
|---|
| 201 | }
|
|---|
| 202 |
|
|---|
| 203 | static int int_rsa_size(const EVP_PKEY *pkey)
|
|---|
| 204 | {
|
|---|
| 205 | return RSA_size(pkey->pkey.rsa);
|
|---|
| 206 | }
|
|---|
| 207 |
|
|---|
| 208 | static int rsa_bits(const EVP_PKEY *pkey)
|
|---|
| 209 | {
|
|---|
| 210 | return BN_num_bits(pkey->pkey.rsa->n);
|
|---|
| 211 | }
|
|---|
| 212 |
|
|---|
| 213 | static int rsa_security_bits(const EVP_PKEY *pkey)
|
|---|
| 214 | {
|
|---|
| 215 | return RSA_security_bits(pkey->pkey.rsa);
|
|---|
| 216 | }
|
|---|
| 217 |
|
|---|
| 218 | static void int_rsa_free(EVP_PKEY *pkey)
|
|---|
| 219 | {
|
|---|
| 220 | RSA_free(pkey->pkey.rsa);
|
|---|
| 221 | }
|
|---|
| 222 |
|
|---|
| 223 | static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
|
|---|
| 224 | {
|
|---|
| 225 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
|
|---|
| 226 | return NULL;
|
|---|
| 227 | return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
|
|---|
| 228 | alg->parameter);
|
|---|
| 229 | }
|
|---|
| 230 |
|
|---|
| 231 | static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
|
|---|
| 232 | int indent)
|
|---|
| 233 | {
|
|---|
| 234 | int rv = 0;
|
|---|
| 235 | X509_ALGOR *maskHash = NULL;
|
|---|
| 236 |
|
|---|
| 237 | if (!BIO_indent(bp, indent, 128))
|
|---|
| 238 | goto err;
|
|---|
| 239 | if (pss_key) {
|
|---|
| 240 | if (pss == NULL) {
|
|---|
| 241 | if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
|
|---|
| 242 | return 0;
|
|---|
| 243 | return 1;
|
|---|
| 244 | } else {
|
|---|
| 245 | if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
|
|---|
| 246 | return 0;
|
|---|
| 247 | }
|
|---|
| 248 | } else if (pss == NULL) {
|
|---|
| 249 | if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
|
|---|
| 250 | return 0;
|
|---|
| 251 | return 1;
|
|---|
| 252 | }
|
|---|
| 253 | if (BIO_puts(bp, "\n") <= 0)
|
|---|
| 254 | goto err;
|
|---|
| 255 | if (pss_key)
|
|---|
| 256 | indent += 2;
|
|---|
| 257 | if (!BIO_indent(bp, indent, 128))
|
|---|
| 258 | goto err;
|
|---|
| 259 | if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
|
|---|
| 260 | goto err;
|
|---|
| 261 |
|
|---|
| 262 | if (pss->hashAlgorithm) {
|
|---|
| 263 | if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
|
|---|
| 264 | goto err;
|
|---|
| 265 | } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
|
|---|
| 266 | goto err;
|
|---|
| 267 | }
|
|---|
| 268 |
|
|---|
| 269 | if (BIO_puts(bp, "\n") <= 0)
|
|---|
| 270 | goto err;
|
|---|
| 271 |
|
|---|
| 272 | if (!BIO_indent(bp, indent, 128))
|
|---|
| 273 | goto err;
|
|---|
| 274 |
|
|---|
| 275 | if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
|
|---|
| 276 | goto err;
|
|---|
| 277 | if (pss->maskGenAlgorithm) {
|
|---|
| 278 | if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
|
|---|
| 279 | goto err;
|
|---|
| 280 | if (BIO_puts(bp, " with ") <= 0)
|
|---|
| 281 | goto err;
|
|---|
| 282 | maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
|
|---|
| 283 | if (maskHash != NULL) {
|
|---|
| 284 | if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
|
|---|
| 285 | goto err;
|
|---|
| 286 | } else if (BIO_puts(bp, "INVALID") <= 0) {
|
|---|
| 287 | goto err;
|
|---|
| 288 | }
|
|---|
| 289 | } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
|
|---|
| 290 | goto err;
|
|---|
| 291 | }
|
|---|
| 292 | BIO_puts(bp, "\n");
|
|---|
| 293 |
|
|---|
| 294 | if (!BIO_indent(bp, indent, 128))
|
|---|
| 295 | goto err;
|
|---|
| 296 | if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
|
|---|
| 297 | goto err;
|
|---|
| 298 | if (pss->saltLength) {
|
|---|
| 299 | if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
|
|---|
| 300 | goto err;
|
|---|
| 301 | } else if (BIO_puts(bp, "14 (default)") <= 0) {
|
|---|
| 302 | goto err;
|
|---|
| 303 | }
|
|---|
| 304 | BIO_puts(bp, "\n");
|
|---|
| 305 |
|
|---|
| 306 | if (!BIO_indent(bp, indent, 128))
|
|---|
| 307 | goto err;
|
|---|
| 308 | if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
|
|---|
| 309 | goto err;
|
|---|
| 310 | if (pss->trailerField) {
|
|---|
| 311 | if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
|
|---|
| 312 | goto err;
|
|---|
| 313 | } else if (BIO_puts(bp, "BC (default)") <= 0) {
|
|---|
| 314 | goto err;
|
|---|
| 315 | }
|
|---|
| 316 | BIO_puts(bp, "\n");
|
|---|
| 317 |
|
|---|
| 318 | rv = 1;
|
|---|
| 319 |
|
|---|
| 320 | err:
|
|---|
| 321 | X509_ALGOR_free(maskHash);
|
|---|
| 322 | return rv;
|
|---|
| 323 |
|
|---|
| 324 | }
|
|---|
| 325 |
|
|---|
| 326 | static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
|
|---|
| 327 | {
|
|---|
| 328 | const RSA *x = pkey->pkey.rsa;
|
|---|
| 329 | char *str;
|
|---|
| 330 | const char *s;
|
|---|
| 331 | int ret = 0, mod_len = 0, ex_primes;
|
|---|
| 332 |
|
|---|
| 333 | if (x->n != NULL)
|
|---|
| 334 | mod_len = BN_num_bits(x->n);
|
|---|
| 335 | ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos);
|
|---|
| 336 |
|
|---|
| 337 | if (!BIO_indent(bp, off, 128))
|
|---|
| 338 | goto err;
|
|---|
| 339 |
|
|---|
| 340 | if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
|
|---|
| 341 | goto err;
|
|---|
| 342 |
|
|---|
| 343 | if (priv && x->d) {
|
|---|
| 344 | if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n",
|
|---|
| 345 | mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0)
|
|---|
| 346 | goto err;
|
|---|
| 347 | str = "modulus:";
|
|---|
| 348 | s = "publicExponent:";
|
|---|
| 349 | } else {
|
|---|
| 350 | if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
|
|---|
| 351 | goto err;
|
|---|
| 352 | str = "Modulus:";
|
|---|
| 353 | s = "Exponent:";
|
|---|
| 354 | }
|
|---|
| 355 | if (!ASN1_bn_print(bp, str, x->n, NULL, off))
|
|---|
| 356 | goto err;
|
|---|
| 357 | if (!ASN1_bn_print(bp, s, x->e, NULL, off))
|
|---|
| 358 | goto err;
|
|---|
| 359 | if (priv) {
|
|---|
| 360 | int i;
|
|---|
| 361 |
|
|---|
| 362 | if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
|
|---|
| 363 | goto err;
|
|---|
| 364 | if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
|
|---|
| 365 | goto err;
|
|---|
| 366 | if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
|
|---|
| 367 | goto err;
|
|---|
| 368 | if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
|
|---|
| 369 | goto err;
|
|---|
| 370 | if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
|
|---|
| 371 | goto err;
|
|---|
| 372 | if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
|
|---|
| 373 | goto err;
|
|---|
| 374 | for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) {
|
|---|
| 375 | /* print multi-prime info */
|
|---|
| 376 | BIGNUM *bn = NULL;
|
|---|
| 377 | RSA_PRIME_INFO *pinfo;
|
|---|
| 378 | int j;
|
|---|
| 379 |
|
|---|
| 380 | pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i);
|
|---|
| 381 | for (j = 0; j < 3; j++) {
|
|---|
| 382 | if (!BIO_indent(bp, off, 128))
|
|---|
| 383 | goto err;
|
|---|
| 384 | switch (j) {
|
|---|
| 385 | case 0:
|
|---|
| 386 | if (BIO_printf(bp, "prime%d:", i + 3) <= 0)
|
|---|
| 387 | goto err;
|
|---|
| 388 | bn = pinfo->r;
|
|---|
| 389 | break;
|
|---|
| 390 | case 1:
|
|---|
| 391 | if (BIO_printf(bp, "exponent%d:", i + 3) <= 0)
|
|---|
| 392 | goto err;
|
|---|
| 393 | bn = pinfo->d;
|
|---|
| 394 | break;
|
|---|
| 395 | case 2:
|
|---|
| 396 | if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0)
|
|---|
| 397 | goto err;
|
|---|
| 398 | bn = pinfo->t;
|
|---|
| 399 | break;
|
|---|
| 400 | default:
|
|---|
| 401 | break;
|
|---|
| 402 | }
|
|---|
| 403 | if (!ASN1_bn_print(bp, "", bn, NULL, off))
|
|---|
| 404 | goto err;
|
|---|
| 405 | }
|
|---|
| 406 | }
|
|---|
| 407 | }
|
|---|
| 408 | if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
|
|---|
| 409 | goto err;
|
|---|
| 410 | ret = 1;
|
|---|
| 411 | err:
|
|---|
| 412 | return ret;
|
|---|
| 413 | }
|
|---|
| 414 |
|
|---|
| 415 | static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
|---|
| 416 | ASN1_PCTX *ctx)
|
|---|
| 417 | {
|
|---|
| 418 | return pkey_rsa_print(bp, pkey, indent, 0);
|
|---|
| 419 | }
|
|---|
| 420 |
|
|---|
| 421 | static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
|---|
| 422 | ASN1_PCTX *ctx)
|
|---|
| 423 | {
|
|---|
| 424 | return pkey_rsa_print(bp, pkey, indent, 1);
|
|---|
| 425 | }
|
|---|
| 426 |
|
|---|
| 427 | static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
|
|---|
| 428 | {
|
|---|
| 429 | RSA_PSS_PARAMS *pss;
|
|---|
| 430 |
|
|---|
| 431 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
|
|---|
| 432 | alg->parameter);
|
|---|
| 433 |
|
|---|
| 434 | if (pss == NULL)
|
|---|
| 435 | return NULL;
|
|---|
| 436 |
|
|---|
| 437 | if (pss->maskGenAlgorithm != NULL) {
|
|---|
| 438 | pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
|
|---|
| 439 | if (pss->maskHash == NULL) {
|
|---|
| 440 | RSA_PSS_PARAMS_free(pss);
|
|---|
| 441 | return NULL;
|
|---|
| 442 | }
|
|---|
| 443 | }
|
|---|
| 444 |
|
|---|
| 445 | return pss;
|
|---|
| 446 | }
|
|---|
| 447 |
|
|---|
| 448 | static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
|
|---|
| 449 | const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
|
|---|
| 450 | {
|
|---|
| 451 | if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
|
|---|
| 452 | int rv;
|
|---|
| 453 | RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
|
|---|
| 454 |
|
|---|
| 455 | rv = rsa_pss_param_print(bp, 0, pss, indent);
|
|---|
| 456 | RSA_PSS_PARAMS_free(pss);
|
|---|
| 457 | if (!rv)
|
|---|
| 458 | return 0;
|
|---|
| 459 | } else if (!sig && BIO_puts(bp, "\n") <= 0) {
|
|---|
| 460 | return 0;
|
|---|
| 461 | }
|
|---|
| 462 | if (sig)
|
|---|
| 463 | return X509_signature_dump(bp, sig, indent);
|
|---|
| 464 | return 1;
|
|---|
| 465 | }
|
|---|
| 466 |
|
|---|
| 467 | static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
|
|---|
| 468 | {
|
|---|
| 469 | X509_ALGOR *alg = NULL;
|
|---|
| 470 | const EVP_MD *md;
|
|---|
| 471 | const EVP_MD *mgf1md;
|
|---|
| 472 | int min_saltlen;
|
|---|
| 473 |
|
|---|
| 474 | switch (op) {
|
|---|
| 475 |
|
|---|
| 476 | case ASN1_PKEY_CTRL_PKCS7_SIGN:
|
|---|
| 477 | if (arg1 == 0)
|
|---|
| 478 | PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
|
|---|
| 479 | break;
|
|---|
| 480 |
|
|---|
| 481 | case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
|
|---|
| 482 | if (pkey_is_pss(pkey))
|
|---|
| 483 | return -2;
|
|---|
| 484 | if (arg1 == 0)
|
|---|
| 485 | PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
|
|---|
| 486 | break;
|
|---|
| 487 | #ifndef OPENSSL_NO_CMS
|
|---|
| 488 | case ASN1_PKEY_CTRL_CMS_SIGN:
|
|---|
| 489 | if (arg1 == 0)
|
|---|
| 490 | return rsa_cms_sign(arg2);
|
|---|
| 491 | else if (arg1 == 1)
|
|---|
| 492 | return rsa_cms_verify(arg2);
|
|---|
| 493 | break;
|
|---|
| 494 |
|
|---|
| 495 | case ASN1_PKEY_CTRL_CMS_ENVELOPE:
|
|---|
| 496 | if (pkey_is_pss(pkey))
|
|---|
| 497 | return -2;
|
|---|
| 498 | if (arg1 == 0)
|
|---|
| 499 | return rsa_cms_encrypt(arg2);
|
|---|
| 500 | else if (arg1 == 1)
|
|---|
| 501 | return rsa_cms_decrypt(arg2);
|
|---|
| 502 | break;
|
|---|
| 503 |
|
|---|
| 504 | case ASN1_PKEY_CTRL_CMS_RI_TYPE:
|
|---|
| 505 | if (pkey_is_pss(pkey))
|
|---|
| 506 | return -2;
|
|---|
| 507 | *(int *)arg2 = CMS_RECIPINFO_TRANS;
|
|---|
| 508 | return 1;
|
|---|
| 509 | #endif
|
|---|
| 510 |
|
|---|
| 511 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
|
|---|
| 512 | if (pkey->pkey.rsa->pss != NULL) {
|
|---|
| 513 | if (!rsa_pss_get_param(pkey->pkey.rsa->pss, &md, &mgf1md,
|
|---|
| 514 | &min_saltlen)) {
|
|---|
| 515 | RSAerr(0, ERR_R_INTERNAL_ERROR);
|
|---|
| 516 | return 0;
|
|---|
| 517 | }
|
|---|
| 518 | *(int *)arg2 = EVP_MD_type(md);
|
|---|
| 519 | /* Return of 2 indicates this MD is mandatory */
|
|---|
| 520 | return 2;
|
|---|
| 521 | }
|
|---|
| 522 | *(int *)arg2 = NID_sha256;
|
|---|
| 523 | return 1;
|
|---|
| 524 |
|
|---|
| 525 | default:
|
|---|
| 526 | return -2;
|
|---|
| 527 |
|
|---|
| 528 | }
|
|---|
| 529 |
|
|---|
| 530 | if (alg)
|
|---|
| 531 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
|
|---|
| 532 |
|
|---|
| 533 | return 1;
|
|---|
| 534 |
|
|---|
| 535 | }
|
|---|
| 536 |
|
|---|
| 537 | /* allocate and set algorithm ID from EVP_MD, default SHA1 */
|
|---|
| 538 | static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
|
|---|
| 539 | {
|
|---|
| 540 | if (md == NULL || EVP_MD_type(md) == NID_sha1)
|
|---|
| 541 | return 1;
|
|---|
| 542 | *palg = X509_ALGOR_new();
|
|---|
| 543 | if (*palg == NULL)
|
|---|
| 544 | return 0;
|
|---|
| 545 | X509_ALGOR_set_md(*palg, md);
|
|---|
| 546 | return 1;
|
|---|
| 547 | }
|
|---|
| 548 |
|
|---|
| 549 | /* Allocate and set MGF1 algorithm ID from EVP_MD */
|
|---|
| 550 | static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
|
|---|
| 551 | {
|
|---|
| 552 | X509_ALGOR *algtmp = NULL;
|
|---|
| 553 | ASN1_STRING *stmp = NULL;
|
|---|
| 554 |
|
|---|
| 555 | *palg = NULL;
|
|---|
| 556 | if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
|
|---|
| 557 | return 1;
|
|---|
| 558 | /* need to embed algorithm ID inside another */
|
|---|
| 559 | if (!rsa_md_to_algor(&algtmp, mgf1md))
|
|---|
| 560 | goto err;
|
|---|
| 561 | if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
|
|---|
| 562 | goto err;
|
|---|
| 563 | *palg = X509_ALGOR_new();
|
|---|
| 564 | if (*palg == NULL)
|
|---|
| 565 | goto err;
|
|---|
| 566 | X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
|
|---|
| 567 | stmp = NULL;
|
|---|
| 568 | err:
|
|---|
| 569 | ASN1_STRING_free(stmp);
|
|---|
| 570 | X509_ALGOR_free(algtmp);
|
|---|
| 571 | if (*palg)
|
|---|
| 572 | return 1;
|
|---|
| 573 | return 0;
|
|---|
| 574 | }
|
|---|
| 575 |
|
|---|
| 576 | /* convert algorithm ID to EVP_MD, default SHA1 */
|
|---|
| 577 | static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
|
|---|
| 578 | {
|
|---|
| 579 | const EVP_MD *md;
|
|---|
| 580 |
|
|---|
| 581 | if (!alg)
|
|---|
| 582 | return EVP_sha1();
|
|---|
| 583 | md = EVP_get_digestbyobj(alg->algorithm);
|
|---|
| 584 | if (md == NULL)
|
|---|
| 585 | RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
|
|---|
| 586 | return md;
|
|---|
| 587 | }
|
|---|
| 588 |
|
|---|
| 589 | /*
|
|---|
| 590 | * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
|
|---|
| 591 | * suitable for setting an AlgorithmIdentifier.
|
|---|
| 592 | */
|
|---|
| 593 |
|
|---|
| 594 | static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
|
|---|
| 595 | {
|
|---|
| 596 | const EVP_MD *sigmd, *mgf1md;
|
|---|
| 597 | EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
|
|---|
| 598 | int saltlen;
|
|---|
| 599 |
|
|---|
| 600 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
|
|---|
| 601 | return NULL;
|
|---|
| 602 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
|
|---|
| 603 | return NULL;
|
|---|
| 604 | if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
|
|---|
| 605 | return NULL;
|
|---|
| 606 | if (saltlen == -1) {
|
|---|
| 607 | saltlen = EVP_MD_size(sigmd);
|
|---|
| 608 | } else if (saltlen == -2 || saltlen == -3) {
|
|---|
| 609 | saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
|
|---|
| 610 | if ((EVP_PKEY_bits(pk) & 0x7) == 1)
|
|---|
| 611 | saltlen--;
|
|---|
| 612 | if (saltlen < 0)
|
|---|
| 613 | return NULL;
|
|---|
| 614 | }
|
|---|
| 615 |
|
|---|
| 616 | return rsa_pss_params_create(sigmd, mgf1md, saltlen);
|
|---|
| 617 | }
|
|---|
| 618 |
|
|---|
| 619 | RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
|
|---|
| 620 | const EVP_MD *mgf1md, int saltlen)
|
|---|
| 621 | {
|
|---|
| 622 | RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
|
|---|
| 623 |
|
|---|
| 624 | if (pss == NULL)
|
|---|
| 625 | goto err;
|
|---|
| 626 | if (saltlen != 20) {
|
|---|
| 627 | pss->saltLength = ASN1_INTEGER_new();
|
|---|
| 628 | if (pss->saltLength == NULL)
|
|---|
| 629 | goto err;
|
|---|
| 630 | if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
|
|---|
| 631 | goto err;
|
|---|
| 632 | }
|
|---|
| 633 | if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
|
|---|
| 634 | goto err;
|
|---|
| 635 | if (mgf1md == NULL)
|
|---|
| 636 | mgf1md = sigmd;
|
|---|
| 637 | if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
|
|---|
| 638 | goto err;
|
|---|
| 639 | if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
|
|---|
| 640 | goto err;
|
|---|
| 641 | return pss;
|
|---|
| 642 | err:
|
|---|
| 643 | RSA_PSS_PARAMS_free(pss);
|
|---|
| 644 | return NULL;
|
|---|
| 645 | }
|
|---|
| 646 |
|
|---|
| 647 | static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
|
|---|
| 648 | {
|
|---|
| 649 | RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
|
|---|
| 650 | ASN1_STRING *os;
|
|---|
| 651 |
|
|---|
| 652 | if (pss == NULL)
|
|---|
| 653 | return NULL;
|
|---|
| 654 |
|
|---|
| 655 | os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
|
|---|
| 656 | RSA_PSS_PARAMS_free(pss);
|
|---|
| 657 | return os;
|
|---|
| 658 | }
|
|---|
| 659 |
|
|---|
| 660 | /*
|
|---|
| 661 | * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
|
|---|
| 662 | * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
|
|---|
| 663 | * passed to pkctx instead.
|
|---|
| 664 | */
|
|---|
| 665 |
|
|---|
| 666 | static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
|
|---|
| 667 | X509_ALGOR *sigalg, EVP_PKEY *pkey)
|
|---|
| 668 | {
|
|---|
| 669 | int rv = -1;
|
|---|
| 670 | int saltlen;
|
|---|
| 671 | const EVP_MD *mgf1md = NULL, *md = NULL;
|
|---|
| 672 | RSA_PSS_PARAMS *pss;
|
|---|
| 673 |
|
|---|
| 674 | /* Sanity check: make sure it is PSS */
|
|---|
| 675 | if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
|
|---|
| 676 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
|
|---|
| 677 | return -1;
|
|---|
| 678 | }
|
|---|
| 679 | /* Decode PSS parameters */
|
|---|
| 680 | pss = rsa_pss_decode(sigalg);
|
|---|
| 681 |
|
|---|
| 682 | if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
|
|---|
| 683 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
|
|---|
| 684 | goto err;
|
|---|
| 685 | }
|
|---|
| 686 |
|
|---|
| 687 | /* We have all parameters now set up context */
|
|---|
| 688 | if (pkey) {
|
|---|
| 689 | if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
|
|---|
| 690 | goto err;
|
|---|
| 691 | } else {
|
|---|
| 692 | const EVP_MD *checkmd;
|
|---|
| 693 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
|
|---|
| 694 | goto err;
|
|---|
| 695 | if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
|
|---|
| 696 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
|
|---|
| 697 | goto err;
|
|---|
| 698 | }
|
|---|
| 699 | }
|
|---|
| 700 |
|
|---|
| 701 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
|
|---|
| 702 | goto err;
|
|---|
| 703 |
|
|---|
| 704 | if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
|
|---|
| 705 | goto err;
|
|---|
| 706 |
|
|---|
| 707 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
|
|---|
| 708 | goto err;
|
|---|
| 709 | /* Carry on */
|
|---|
| 710 | rv = 1;
|
|---|
| 711 |
|
|---|
| 712 | err:
|
|---|
| 713 | RSA_PSS_PARAMS_free(pss);
|
|---|
| 714 | return rv;
|
|---|
| 715 | }
|
|---|
| 716 |
|
|---|
| 717 | int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
|
|---|
| 718 | const EVP_MD **pmgf1md, int *psaltlen)
|
|---|
| 719 | {
|
|---|
| 720 | if (pss == NULL)
|
|---|
| 721 | return 0;
|
|---|
| 722 | *pmd = rsa_algor_to_md(pss->hashAlgorithm);
|
|---|
| 723 | if (*pmd == NULL)
|
|---|
| 724 | return 0;
|
|---|
| 725 | *pmgf1md = rsa_algor_to_md(pss->maskHash);
|
|---|
| 726 | if (*pmgf1md == NULL)
|
|---|
| 727 | return 0;
|
|---|
| 728 | if (pss->saltLength) {
|
|---|
| 729 | *psaltlen = ASN1_INTEGER_get(pss->saltLength);
|
|---|
| 730 | if (*psaltlen < 0) {
|
|---|
| 731 | RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
|
|---|
| 732 | return 0;
|
|---|
| 733 | }
|
|---|
| 734 | } else {
|
|---|
| 735 | *psaltlen = 20;
|
|---|
| 736 | }
|
|---|
| 737 |
|
|---|
| 738 | /*
|
|---|
| 739 | * low-level routines support only trailer field 0xbc (value 1) and
|
|---|
| 740 | * PKCS#1 says we should reject any other value anyway.
|
|---|
| 741 | */
|
|---|
| 742 | if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
|
|---|
| 743 | RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
|
|---|
| 744 | return 0;
|
|---|
| 745 | }
|
|---|
| 746 |
|
|---|
| 747 | return 1;
|
|---|
| 748 | }
|
|---|
| 749 |
|
|---|
| 750 | #ifndef OPENSSL_NO_CMS
|
|---|
| 751 | static int rsa_cms_verify(CMS_SignerInfo *si)
|
|---|
| 752 | {
|
|---|
| 753 | int nid, nid2;
|
|---|
| 754 | X509_ALGOR *alg;
|
|---|
| 755 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
|
|---|
| 756 |
|
|---|
| 757 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
|
|---|
| 758 | nid = OBJ_obj2nid(alg->algorithm);
|
|---|
| 759 | if (nid == EVP_PKEY_RSA_PSS)
|
|---|
| 760 | return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
|
|---|
| 761 | /* Only PSS allowed for PSS keys */
|
|---|
| 762 | if (pkey_ctx_is_pss(pkctx)) {
|
|---|
| 763 | RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
|
|---|
| 764 | return 0;
|
|---|
| 765 | }
|
|---|
| 766 | if (nid == NID_rsaEncryption)
|
|---|
| 767 | return 1;
|
|---|
| 768 | /* Workaround for some implementation that use a signature OID */
|
|---|
| 769 | if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
|
|---|
| 770 | if (nid2 == NID_rsaEncryption)
|
|---|
| 771 | return 1;
|
|---|
| 772 | }
|
|---|
| 773 | return 0;
|
|---|
| 774 | }
|
|---|
| 775 | #endif
|
|---|
| 776 |
|
|---|
| 777 | /*
|
|---|
| 778 | * Customised RSA item verification routine. This is called when a signature
|
|---|
| 779 | * is encountered requiring special handling. We currently only handle PSS.
|
|---|
| 780 | */
|
|---|
| 781 |
|
|---|
| 782 | static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
|
|---|
| 783 | X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
|
|---|
| 784 | EVP_PKEY *pkey)
|
|---|
| 785 | {
|
|---|
| 786 | /* Sanity check: make sure it is PSS */
|
|---|
| 787 | if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
|
|---|
| 788 | RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
|
|---|
| 789 | return -1;
|
|---|
| 790 | }
|
|---|
| 791 | if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
|
|---|
| 792 | /* Carry on */
|
|---|
| 793 | return 2;
|
|---|
| 794 | }
|
|---|
| 795 | return -1;
|
|---|
| 796 | }
|
|---|
| 797 |
|
|---|
| 798 | #ifndef OPENSSL_NO_CMS
|
|---|
| 799 | static int rsa_cms_sign(CMS_SignerInfo *si)
|
|---|
| 800 | {
|
|---|
| 801 | int pad_mode = RSA_PKCS1_PADDING;
|
|---|
| 802 | X509_ALGOR *alg;
|
|---|
| 803 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
|
|---|
| 804 | ASN1_STRING *os = NULL;
|
|---|
| 805 |
|
|---|
| 806 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
|
|---|
| 807 | if (pkctx) {
|
|---|
| 808 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
|---|
| 809 | return 0;
|
|---|
| 810 | }
|
|---|
| 811 | if (pad_mode == RSA_PKCS1_PADDING) {
|
|---|
| 812 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
|
|---|
| 813 | return 1;
|
|---|
| 814 | }
|
|---|
| 815 | /* We don't support it */
|
|---|
| 816 | if (pad_mode != RSA_PKCS1_PSS_PADDING)
|
|---|
| 817 | return 0;
|
|---|
| 818 | os = rsa_ctx_to_pss_string(pkctx);
|
|---|
| 819 | if (!os)
|
|---|
| 820 | return 0;
|
|---|
| 821 | X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
|
|---|
| 822 | return 1;
|
|---|
| 823 | }
|
|---|
| 824 | #endif
|
|---|
| 825 |
|
|---|
| 826 | static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
|
|---|
| 827 | X509_ALGOR *alg1, X509_ALGOR *alg2,
|
|---|
| 828 | ASN1_BIT_STRING *sig)
|
|---|
| 829 | {
|
|---|
| 830 | int pad_mode;
|
|---|
| 831 | EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
|
|---|
| 832 |
|
|---|
| 833 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
|---|
| 834 | return 0;
|
|---|
| 835 | if (pad_mode == RSA_PKCS1_PADDING)
|
|---|
| 836 | return 2;
|
|---|
| 837 | if (pad_mode == RSA_PKCS1_PSS_PADDING) {
|
|---|
| 838 | ASN1_STRING *os1 = NULL;
|
|---|
| 839 | os1 = rsa_ctx_to_pss_string(pkctx);
|
|---|
| 840 | if (!os1)
|
|---|
| 841 | return 0;
|
|---|
| 842 | /* Duplicate parameters if we have to */
|
|---|
| 843 | if (alg2) {
|
|---|
| 844 | ASN1_STRING *os2 = ASN1_STRING_dup(os1);
|
|---|
| 845 | if (!os2) {
|
|---|
| 846 | ASN1_STRING_free(os1);
|
|---|
| 847 | return 0;
|
|---|
| 848 | }
|
|---|
| 849 | X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
|
|---|
| 850 | V_ASN1_SEQUENCE, os2);
|
|---|
| 851 | }
|
|---|
| 852 | X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
|
|---|
| 853 | V_ASN1_SEQUENCE, os1);
|
|---|
| 854 | return 3;
|
|---|
| 855 | }
|
|---|
| 856 | return 2;
|
|---|
| 857 | }
|
|---|
| 858 |
|
|---|
| 859 | static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
|
|---|
| 860 | const ASN1_STRING *sig)
|
|---|
| 861 | {
|
|---|
| 862 | int rv = 0;
|
|---|
| 863 | int mdnid, saltlen;
|
|---|
| 864 | uint32_t flags;
|
|---|
| 865 | const EVP_MD *mgf1md = NULL, *md = NULL;
|
|---|
| 866 | RSA_PSS_PARAMS *pss;
|
|---|
| 867 |
|
|---|
| 868 | /* Sanity check: make sure it is PSS */
|
|---|
| 869 | if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
|
|---|
| 870 | return 0;
|
|---|
| 871 | /* Decode PSS parameters */
|
|---|
| 872 | pss = rsa_pss_decode(sigalg);
|
|---|
| 873 | if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
|
|---|
| 874 | goto err;
|
|---|
| 875 | mdnid = EVP_MD_type(md);
|
|---|
| 876 | /*
|
|---|
| 877 | * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
|
|---|
| 878 | * match and salt length must equal digest size
|
|---|
| 879 | */
|
|---|
| 880 | if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
|
|---|
| 881 | && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
|
|---|
| 882 | flags = X509_SIG_INFO_TLS;
|
|---|
| 883 | else
|
|---|
| 884 | flags = 0;
|
|---|
| 885 | /* Note: security bits half number of digest bits */
|
|---|
| 886 | X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, EVP_MD_size(md) * 4,
|
|---|
| 887 | flags);
|
|---|
| 888 | rv = 1;
|
|---|
| 889 | err:
|
|---|
| 890 | RSA_PSS_PARAMS_free(pss);
|
|---|
| 891 | return rv;
|
|---|
| 892 | }
|
|---|
| 893 |
|
|---|
| 894 | #ifndef OPENSSL_NO_CMS
|
|---|
| 895 | static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
|
|---|
| 896 | {
|
|---|
| 897 | RSA_OAEP_PARAMS *oaep;
|
|---|
| 898 |
|
|---|
| 899 | oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
|
|---|
| 900 | alg->parameter);
|
|---|
| 901 |
|
|---|
| 902 | if (oaep == NULL)
|
|---|
| 903 | return NULL;
|
|---|
| 904 |
|
|---|
| 905 | if (oaep->maskGenFunc != NULL) {
|
|---|
| 906 | oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
|
|---|
| 907 | if (oaep->maskHash == NULL) {
|
|---|
| 908 | RSA_OAEP_PARAMS_free(oaep);
|
|---|
| 909 | return NULL;
|
|---|
| 910 | }
|
|---|
| 911 | }
|
|---|
| 912 | return oaep;
|
|---|
| 913 | }
|
|---|
| 914 |
|
|---|
| 915 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
|
|---|
| 916 | {
|
|---|
| 917 | EVP_PKEY_CTX *pkctx;
|
|---|
| 918 | X509_ALGOR *cmsalg;
|
|---|
| 919 | int nid;
|
|---|
| 920 | int rv = -1;
|
|---|
| 921 | unsigned char *label = NULL;
|
|---|
| 922 | int labellen = 0;
|
|---|
| 923 | const EVP_MD *mgf1md = NULL, *md = NULL;
|
|---|
| 924 | RSA_OAEP_PARAMS *oaep;
|
|---|
| 925 |
|
|---|
| 926 | pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
|
|---|
| 927 | if (pkctx == NULL)
|
|---|
| 928 | return 0;
|
|---|
| 929 | if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
|
|---|
| 930 | return -1;
|
|---|
| 931 | nid = OBJ_obj2nid(cmsalg->algorithm);
|
|---|
| 932 | if (nid == NID_rsaEncryption)
|
|---|
| 933 | return 1;
|
|---|
| 934 | if (nid != NID_rsaesOaep) {
|
|---|
| 935 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
|
|---|
| 936 | return -1;
|
|---|
| 937 | }
|
|---|
| 938 | /* Decode OAEP parameters */
|
|---|
| 939 | oaep = rsa_oaep_decode(cmsalg);
|
|---|
| 940 |
|
|---|
| 941 | if (oaep == NULL) {
|
|---|
| 942 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
|
|---|
| 943 | goto err;
|
|---|
| 944 | }
|
|---|
| 945 |
|
|---|
| 946 | mgf1md = rsa_algor_to_md(oaep->maskHash);
|
|---|
| 947 | if (mgf1md == NULL)
|
|---|
| 948 | goto err;
|
|---|
| 949 | md = rsa_algor_to_md(oaep->hashFunc);
|
|---|
| 950 | if (md == NULL)
|
|---|
| 951 | goto err;
|
|---|
| 952 |
|
|---|
| 953 | if (oaep->pSourceFunc != NULL) {
|
|---|
| 954 | X509_ALGOR *plab = oaep->pSourceFunc;
|
|---|
| 955 |
|
|---|
| 956 | if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
|
|---|
| 957 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
|
|---|
| 958 | goto err;
|
|---|
| 959 | }
|
|---|
| 960 | if (plab->parameter->type != V_ASN1_OCTET_STRING) {
|
|---|
| 961 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
|
|---|
| 962 | goto err;
|
|---|
| 963 | }
|
|---|
| 964 |
|
|---|
| 965 | label = plab->parameter->value.octet_string->data;
|
|---|
| 966 | /* Stop label being freed when OAEP parameters are freed */
|
|---|
| 967 | plab->parameter->value.octet_string->data = NULL;
|
|---|
| 968 | labellen = plab->parameter->value.octet_string->length;
|
|---|
| 969 | }
|
|---|
| 970 |
|
|---|
| 971 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
|
|---|
| 972 | goto err;
|
|---|
| 973 | if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
|
|---|
| 974 | goto err;
|
|---|
| 975 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
|
|---|
| 976 | goto err;
|
|---|
| 977 | if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
|
|---|
| 978 | goto err;
|
|---|
| 979 | /* Carry on */
|
|---|
| 980 | rv = 1;
|
|---|
| 981 |
|
|---|
| 982 | err:
|
|---|
| 983 | RSA_OAEP_PARAMS_free(oaep);
|
|---|
| 984 | return rv;
|
|---|
| 985 | }
|
|---|
| 986 |
|
|---|
| 987 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
|
|---|
| 988 | {
|
|---|
| 989 | const EVP_MD *md, *mgf1md;
|
|---|
| 990 | RSA_OAEP_PARAMS *oaep = NULL;
|
|---|
| 991 | ASN1_STRING *os = NULL;
|
|---|
| 992 | X509_ALGOR *alg;
|
|---|
| 993 | EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
|
|---|
| 994 | int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
|
|---|
| 995 | unsigned char *label;
|
|---|
| 996 |
|
|---|
| 997 | if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
|
|---|
| 998 | return 0;
|
|---|
| 999 | if (pkctx) {
|
|---|
| 1000 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
|---|
| 1001 | return 0;
|
|---|
| 1002 | }
|
|---|
| 1003 | if (pad_mode == RSA_PKCS1_PADDING) {
|
|---|
| 1004 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
|
|---|
| 1005 | return 1;
|
|---|
| 1006 | }
|
|---|
| 1007 | /* Not supported */
|
|---|
| 1008 | if (pad_mode != RSA_PKCS1_OAEP_PADDING)
|
|---|
| 1009 | return 0;
|
|---|
| 1010 | if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
|
|---|
| 1011 | goto err;
|
|---|
| 1012 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
|
|---|
| 1013 | goto err;
|
|---|
| 1014 | labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
|
|---|
| 1015 | if (labellen < 0)
|
|---|
| 1016 | goto err;
|
|---|
| 1017 | oaep = RSA_OAEP_PARAMS_new();
|
|---|
| 1018 | if (oaep == NULL)
|
|---|
| 1019 | goto err;
|
|---|
| 1020 | if (!rsa_md_to_algor(&oaep->hashFunc, md))
|
|---|
| 1021 | goto err;
|
|---|
| 1022 | if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
|
|---|
| 1023 | goto err;
|
|---|
| 1024 | if (labellen > 0) {
|
|---|
| 1025 | ASN1_OCTET_STRING *los;
|
|---|
| 1026 | oaep->pSourceFunc = X509_ALGOR_new();
|
|---|
| 1027 | if (oaep->pSourceFunc == NULL)
|
|---|
| 1028 | goto err;
|
|---|
| 1029 | los = ASN1_OCTET_STRING_new();
|
|---|
| 1030 | if (los == NULL)
|
|---|
| 1031 | goto err;
|
|---|
| 1032 | if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
|
|---|
| 1033 | ASN1_OCTET_STRING_free(los);
|
|---|
| 1034 | goto err;
|
|---|
| 1035 | }
|
|---|
| 1036 | X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
|
|---|
| 1037 | V_ASN1_OCTET_STRING, los);
|
|---|
| 1038 | }
|
|---|
| 1039 | /* create string with pss parameter encoding. */
|
|---|
| 1040 | if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
|
|---|
| 1041 | goto err;
|
|---|
| 1042 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
|
|---|
| 1043 | os = NULL;
|
|---|
| 1044 | rv = 1;
|
|---|
| 1045 | err:
|
|---|
| 1046 | RSA_OAEP_PARAMS_free(oaep);
|
|---|
| 1047 | ASN1_STRING_free(os);
|
|---|
| 1048 | return rv;
|
|---|
| 1049 | }
|
|---|
| 1050 | #endif
|
|---|
| 1051 |
|
|---|
| 1052 | static int rsa_pkey_check(const EVP_PKEY *pkey)
|
|---|
| 1053 | {
|
|---|
| 1054 | return RSA_check_key_ex(pkey->pkey.rsa, NULL);
|
|---|
| 1055 | }
|
|---|
| 1056 |
|
|---|
| 1057 | const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
|
|---|
| 1058 | {
|
|---|
| 1059 | EVP_PKEY_RSA,
|
|---|
| 1060 | EVP_PKEY_RSA,
|
|---|
| 1061 | ASN1_PKEY_SIGPARAM_NULL,
|
|---|
| 1062 |
|
|---|
| 1063 | "RSA",
|
|---|
| 1064 | "OpenSSL RSA method",
|
|---|
| 1065 |
|
|---|
| 1066 | rsa_pub_decode,
|
|---|
| 1067 | rsa_pub_encode,
|
|---|
| 1068 | rsa_pub_cmp,
|
|---|
| 1069 | rsa_pub_print,
|
|---|
| 1070 |
|
|---|
| 1071 | rsa_priv_decode,
|
|---|
| 1072 | rsa_priv_encode,
|
|---|
| 1073 | rsa_priv_print,
|
|---|
| 1074 |
|
|---|
| 1075 | int_rsa_size,
|
|---|
| 1076 | rsa_bits,
|
|---|
| 1077 | rsa_security_bits,
|
|---|
| 1078 |
|
|---|
| 1079 | 0, 0, 0, 0, 0, 0,
|
|---|
| 1080 |
|
|---|
| 1081 | rsa_sig_print,
|
|---|
| 1082 | int_rsa_free,
|
|---|
| 1083 | rsa_pkey_ctrl,
|
|---|
| 1084 | old_rsa_priv_decode,
|
|---|
| 1085 | old_rsa_priv_encode,
|
|---|
| 1086 | rsa_item_verify,
|
|---|
| 1087 | rsa_item_sign,
|
|---|
| 1088 | rsa_sig_info_set,
|
|---|
| 1089 | rsa_pkey_check
|
|---|
| 1090 | },
|
|---|
| 1091 |
|
|---|
| 1092 | {
|
|---|
| 1093 | EVP_PKEY_RSA2,
|
|---|
| 1094 | EVP_PKEY_RSA,
|
|---|
| 1095 | ASN1_PKEY_ALIAS}
|
|---|
| 1096 | };
|
|---|
| 1097 |
|
|---|
| 1098 | const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
|
|---|
| 1099 | EVP_PKEY_RSA_PSS,
|
|---|
| 1100 | EVP_PKEY_RSA_PSS,
|
|---|
| 1101 | ASN1_PKEY_SIGPARAM_NULL,
|
|---|
| 1102 |
|
|---|
| 1103 | "RSA-PSS",
|
|---|
| 1104 | "OpenSSL RSA-PSS method",
|
|---|
| 1105 |
|
|---|
| 1106 | rsa_pub_decode,
|
|---|
| 1107 | rsa_pub_encode,
|
|---|
| 1108 | rsa_pub_cmp,
|
|---|
| 1109 | rsa_pub_print,
|
|---|
| 1110 |
|
|---|
| 1111 | rsa_priv_decode,
|
|---|
| 1112 | rsa_priv_encode,
|
|---|
| 1113 | rsa_priv_print,
|
|---|
| 1114 |
|
|---|
| 1115 | int_rsa_size,
|
|---|
| 1116 | rsa_bits,
|
|---|
| 1117 | rsa_security_bits,
|
|---|
| 1118 |
|
|---|
| 1119 | 0, 0, 0, 0, 0, 0,
|
|---|
| 1120 |
|
|---|
| 1121 | rsa_sig_print,
|
|---|
| 1122 | int_rsa_free,
|
|---|
| 1123 | rsa_pkey_ctrl,
|
|---|
| 1124 | 0, 0,
|
|---|
| 1125 | rsa_item_verify,
|
|---|
| 1126 | rsa_item_sign,
|
|---|
| 1127 | 0,
|
|---|
| 1128 | rsa_pkey_check
|
|---|
| 1129 | };
|
|---|
