-/* crypto/rsa/rsa_ameth.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 2006.
- */
-/* ====================================================================
- * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+/*
+ * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/x509.h>
-#include <openssl/rsa.h>
-#include "asn1_locl.h"
+#include <openssl/bn.h>
+#include <openssl/cms.h>
+#include <openssl/core_names.h>
+#include "internal/param_build.h"
+#include "crypto/asn1.h"
+#include "crypto/evp.h"
+#include "crypto/rsa.h"
+#include "rsa_local.h"
+
+#ifndef OPENSSL_NO_CMS
+static int rsa_cms_sign(CMS_SignerInfo *si);
+static int rsa_cms_verify(CMS_SignerInfo *si);
+static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
+static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
+#endif
+
+static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg);
+
+/* Set any parameters associated with pkey */
+static int rsa_param_encode(const EVP_PKEY *pkey,
+ ASN1_STRING **pstr, int *pstrtype)
+{
+ const RSA *rsa = pkey->pkey.rsa;
+
+ *pstr = NULL;
+ /* If RSA it's just NULL type */
+ if (pkey->ameth->pkey_id != EVP_PKEY_RSA_PSS) {
+ *pstrtype = V_ASN1_NULL;
+ return 1;
+ }
+ /* If no PSS parameters we omit parameters entirely */
+ if (rsa->pss == NULL) {
+ *pstrtype = V_ASN1_UNDEF;
+ return 1;
+ }
+ /* Encode PSS parameters */
+ if (ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr) == NULL)
+ return 0;
+
+ *pstrtype = V_ASN1_SEQUENCE;
+ return 1;
+}
+/* Decode any parameters and set them in RSA structure */
+static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
+{
+ const ASN1_OBJECT *algoid;
+ const void *algp;
+ int algptype;
+
+ X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
+ if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS)
+ return 1;
+ if (algptype == V_ASN1_UNDEF)
+ return 1;
+ if (algptype != V_ASN1_SEQUENCE) {
+ RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
+ return 0;
+ }
+ rsa->pss = rsa_pss_decode(alg);
+ if (rsa->pss == NULL)
+ return 0;
+ return 1;
+}
static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
- {
- unsigned char *penc = NULL;
- int penclen;
- penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
- if (penclen <= 0)
- return 0;
- if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
- V_ASN1_NULL, NULL, penc, penclen))
- return 1;
-
- OPENSSL_free(penc);
- return 0;
- }
+{
+ unsigned char *penc = NULL;
+ int penclen;
+ ASN1_STRING *str;
+ int strtype;
+
+ if (!rsa_param_encode(pkey, &str, &strtype))
+ return 0;
+ penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
+ if (penclen <= 0)
+ return 0;
+ if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
+ strtype, str, penc, penclen))
+ return 1;
+
+ OPENSSL_free(penc);
+ return 0;
+}
static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
- {
- const unsigned char *p;
- int pklen;
- RSA *rsa = NULL;
- if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
- return 0;
- if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen)))
- {
- RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
- return 0;
- }
- EVP_PKEY_assign_RSA (pkey, rsa);
- return 1;
- }
+{
+ const unsigned char *p;
+ int pklen;
+ X509_ALGOR *alg;
+ RSA *rsa = NULL;
+
+ if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
+ return 0;
+ if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
+ RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
+ return 0;
+ }
+ if (!rsa_param_decode(rsa, alg)) {
+ RSA_free(rsa);
+ return 0;
+ }
+ if (!EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa)) {
+ RSA_free(rsa);
+ return 0;
+ }
+ return 1;
+}
static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
- {
- if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
- || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
- return 0;
- return 1;
- }
+{
+ if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
+ || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
+ return 0;
+ return 1;
+}
static int old_rsa_priv_decode(EVP_PKEY *pkey,
- const unsigned char **pder, int derlen)
- {
- RSA *rsa;
- if (!(rsa = d2i_RSAPrivateKey (NULL, pder, derlen)))
- {
- RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
- return 0;
- }
- EVP_PKEY_assign_RSA(pkey, rsa);
- return 1;
- }
+ const unsigned char **pder, int derlen)
+{
+ RSA *rsa;
+
+ if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
+ RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
+ return 0;
+ }
+ EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
+ return 1;
+}
static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
- {
- return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
- }
+{
+ return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
+}
static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
- {
- unsigned char *rk = NULL;
- int rklen;
- rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
-
- if (rklen <= 0)
- {
- RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
- V_ASN1_NULL, NULL, rk, rklen))
- {
- RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- return 1;
- }
-
-static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
- {
- const unsigned char *p;
- int pklen;
- if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
- return 0;
- return old_rsa_priv_decode(pkey, &p, pklen);
- }
+{
+ unsigned char *rk = NULL;
+ int rklen;
+ ASN1_STRING *str;
+ int strtype;
+
+ if (!rsa_param_encode(pkey, &str, &strtype))
+ return 0;
+ rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
+
+ if (rklen <= 0) {
+ RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
+ ASN1_STRING_free(str);
+ return 0;
+ }
+
+ if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
+ strtype, str, rk, rklen)) {
+ RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
+ ASN1_STRING_free(str);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
+{
+ const unsigned char *p;
+ RSA *rsa;
+ int pklen;
+ const X509_ALGOR *alg;
+
+ if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
+ return 0;
+ rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
+ if (rsa == NULL) {
+ RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
+ return 0;
+ }
+ if (!rsa_param_decode(rsa, alg)) {
+ RSA_free(rsa);
+ return 0;
+ }
+ EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
+ return 1;
+}
static int int_rsa_size(const EVP_PKEY *pkey)
- {
- return RSA_size(pkey->pkey.rsa);
- }
+{
+ return RSA_size(pkey->pkey.rsa);
+}
static int rsa_bits(const EVP_PKEY *pkey)
- {
- return BN_num_bits(pkey->pkey.rsa->n);
- }
+{
+ return BN_num_bits(pkey->pkey.rsa->n);
+}
+
+static int rsa_security_bits(const EVP_PKEY *pkey)
+{
+ return RSA_security_bits(pkey->pkey.rsa);
+}
static void int_rsa_free(EVP_PKEY *pkey)
- {
- RSA_free(pkey->pkey.rsa);
- }
-
-
-static void update_buflen(const BIGNUM *b, size_t *pbuflen)
- {
- size_t i;
- if (!b)
- return;
- if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
- *pbuflen = i;
- }
-
-static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
- {
- char *str;
- const char *s;
- unsigned char *m=NULL;
- int ret=0, mod_len = 0;
- size_t buf_len=0;
-
- update_buflen(x->n, &buf_len);
- update_buflen(x->e, &buf_len);
-
- if (priv)
- {
- update_buflen(x->d, &buf_len);
- update_buflen(x->p, &buf_len);
- update_buflen(x->q, &buf_len);
- update_buflen(x->dmp1, &buf_len);
- update_buflen(x->dmq1, &buf_len);
- update_buflen(x->iqmp, &buf_len);
- }
-
- m=(unsigned char *)OPENSSL_malloc(buf_len+10);
- if (m == NULL)
- {
- RSAerr(RSA_F_DO_RSA_PRINT,ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (x->n != NULL)
- mod_len = BN_num_bits(x->n);
-
- if(!BIO_indent(bp,off,128))
- goto err;
-
- if (priv && x->d)
- {
- if (BIO_printf(bp,"Private-Key: (%d bit)\n", mod_len)
- <= 0) goto err;
- str = "modulus:";
- s = "publicExponent:";
- }
- else
- {
- if (BIO_printf(bp,"Public-Key: (%d bit)\n", mod_len)
- <= 0) goto err;
- str = "Modulus:";
- s= "Exponent:";
- }
- if (!ASN1_bn_print(bp,str,x->n,m,off)) goto err;
- if (!ASN1_bn_print(bp,s,x->e,m,off))
- goto err;
- if (priv)
- {
- if (!ASN1_bn_print(bp,"privateExponent:",x->d,m,off))
- goto err;
- if (!ASN1_bn_print(bp,"prime1:",x->p,m,off))
- goto err;
- if (!ASN1_bn_print(bp,"prime2:",x->q,m,off))
- goto err;
- if (!ASN1_bn_print(bp,"exponent1:",x->dmp1,m,off))
- goto err;
- if (!ASN1_bn_print(bp,"exponent2:",x->dmq1,m,off))
- goto err;
- if (!ASN1_bn_print(bp,"coefficient:",x->iqmp,m,off))
- goto err;
- }
- ret=1;
-err:
- if (m != NULL) OPENSSL_free(m);
- return(ret);
- }
+{
+ RSA_free(pkey->pkey.rsa);
+}
-static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
- ASN1_PCTX *ctx)
- {
- return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
- }
+static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
+{
+ if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
+ return NULL;
+ return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
+ alg->parameter);
+}
+
+static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
+ int indent)
+{
+ int rv = 0;
+ X509_ALGOR *maskHash = NULL;
+
+ if (!BIO_indent(bp, indent, 128))
+ goto err;
+ if (pss_key) {
+ if (pss == NULL) {
+ if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
+ return 0;
+ return 1;
+ } else {
+ if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
+ return 0;
+ }
+ } else if (pss == NULL) {
+ if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
+ return 0;
+ return 1;
+ }
+ if (BIO_puts(bp, "\n") <= 0)
+ goto err;
+ if (pss_key)
+ indent += 2;
+ if (!BIO_indent(bp, indent, 128))
+ goto err;
+ if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
+ goto err;
+
+ if (pss->hashAlgorithm) {
+ if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
+ goto err;
+ } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
+ goto err;
+ }
+
+ if (BIO_puts(bp, "\n") <= 0)
+ goto err;
+
+ if (!BIO_indent(bp, indent, 128))
+ goto err;
+
+ if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
+ goto err;
+ if (pss->maskGenAlgorithm) {
+ if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
+ goto err;
+ if (BIO_puts(bp, " with ") <= 0)
+ goto err;
+ maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
+ if (maskHash != NULL) {
+ if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
+ goto err;
+ } else if (BIO_puts(bp, "INVALID") <= 0) {
+ goto err;
+ }
+ } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
+ goto err;
+ }
+ BIO_puts(bp, "\n");
+
+ if (!BIO_indent(bp, indent, 128))
+ goto err;
+ if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
+ goto err;
+ if (pss->saltLength) {
+ if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
+ goto err;
+ } else if (BIO_puts(bp, "14 (default)") <= 0) {
+ goto err;
+ }
+ BIO_puts(bp, "\n");
+
+ if (!BIO_indent(bp, indent, 128))
+ goto err;
+ if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
+ goto err;
+ if (pss->trailerField) {
+ if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
+ goto err;
+ } else if (BIO_puts(bp, "BC (default)") <= 0) {
+ goto err;
+ }
+ BIO_puts(bp, "\n");
+
+ rv = 1;
+
+ err:
+ X509_ALGOR_free(maskHash);
+ return rv;
+
+}
+
+static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
+{
+ const RSA *x = pkey->pkey.rsa;
+ char *str;
+ const char *s;
+ int ret = 0, mod_len = 0, ex_primes;
+ if (x->n != NULL)
+ mod_len = BN_num_bits(x->n);
+ ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos);
+
+ if (!BIO_indent(bp, off, 128))
+ goto err;
+
+ if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
+ goto err;
+
+ if (priv && x->d) {
+ if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n",
+ mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0)
+ goto err;
+ str = "modulus:";
+ s = "publicExponent:";
+ } else {
+ if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
+ goto err;
+ str = "Modulus:";
+ s = "Exponent:";
+ }
+ if (!ASN1_bn_print(bp, str, x->n, NULL, off))
+ goto err;
+ if (!ASN1_bn_print(bp, s, x->e, NULL, off))
+ goto err;
+ if (priv) {
+ int i;
+
+ if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
+ goto err;
+ if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
+ goto err;
+ if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
+ goto err;
+ if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
+ goto err;
+ if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
+ goto err;
+ if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
+ goto err;
+ for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) {
+ /* print multi-prime info */
+ BIGNUM *bn = NULL;
+ RSA_PRIME_INFO *pinfo;
+ int j;
+
+ pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i);
+ for (j = 0; j < 3; j++) {
+ if (!BIO_indent(bp, off, 128))
+ goto err;
+ switch (j) {
+ case 0:
+ if (BIO_printf(bp, "prime%d:", i + 3) <= 0)
+ goto err;
+ bn = pinfo->r;
+ break;
+ case 1:
+ if (BIO_printf(bp, "exponent%d:", i + 3) <= 0)
+ goto err;
+ bn = pinfo->d;
+ break;
+ case 2:
+ if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0)
+ goto err;
+ bn = pinfo->t;
+ break;
+ default:
+ break;
+ }
+ if (!ASN1_bn_print(bp, "", bn, NULL, off))
+ goto err;
+ }
+ }
+ }
+ if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
+ goto err;
+ ret = 1;
+ err:
+ return ret;
+}
+
+static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+{
+ return pkey_rsa_print(bp, pkey, indent, 0);
+}
static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
- ASN1_PCTX *ctx)
- {
- return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
- }
+ ASN1_PCTX *ctx)
+{
+ return pkey_rsa_print(bp, pkey, indent, 1);
+}
+
+static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
+{
+ RSA_PSS_PARAMS *pss;
+
+ pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
+ alg->parameter);
+
+ if (pss == NULL)
+ return NULL;
+ if (pss->maskGenAlgorithm != NULL) {
+ pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
+ if (pss->maskHash == NULL) {
+ RSA_PSS_PARAMS_free(pss);
+ return NULL;
+ }
+ }
+
+ return pss;
+}
+
+static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
+ const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
+{
+ if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
+ int rv;
+ RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
+
+ rv = rsa_pss_param_print(bp, 0, pss, indent);
+ RSA_PSS_PARAMS_free(pss);
+ if (!rv)
+ return 0;
+ } else if (BIO_puts(bp, "\n") <= 0) {
+ return 0;
+ }
+ if (sig)
+ return X509_signature_dump(bp, sig, indent);
+ return 1;
+}
static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
- {
- switch (op)
- {
-
- case ASN1_PKEY_CTRL_PKCS7_SIGN:
- if (arg1 == 0)
- {
- X509_ALGOR *alg;
- PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
- X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
- V_ASN1_NULL, 0);
- }
- return 1;
-
- case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
- if (arg1 == 0)
- {
- X509_ALGOR *alg;
- PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
- X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
- V_ASN1_NULL, 0);
- }
- return 1;
-
- case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
- *(int *)arg2 = NID_sha1;
- return 1;
-
- default:
- return -2;
-
- }
-
- }
-
-
-const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] =
- {
- {
- EVP_PKEY_RSA,
- EVP_PKEY_RSA,
- ASN1_PKEY_SIGPARAM_NULL,
-
- "RSA",
- "OpenSSL RSA method",
-
- rsa_pub_decode,
- rsa_pub_encode,
- rsa_pub_cmp,
- rsa_pub_print,
-
- rsa_priv_decode,
- rsa_priv_encode,
- rsa_priv_print,
-
- int_rsa_size,
- rsa_bits,
-
- 0,0,0,0,0,0,
-
- int_rsa_free,
- rsa_pkey_ctrl,
- old_rsa_priv_decode,
- old_rsa_priv_encode
- },
-
- {
- EVP_PKEY_RSA2,
- EVP_PKEY_RSA,
- ASN1_PKEY_ALIAS
- }
- };
+{
+ X509_ALGOR *alg = NULL;
+ const EVP_MD *md;
+ const EVP_MD *mgf1md;
+ int min_saltlen;
+
+ switch (op) {
+
+ case ASN1_PKEY_CTRL_PKCS7_SIGN:
+ if (arg1 == 0)
+ PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
+ break;
+
+ case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
+ if (pkey_is_pss(pkey))
+ return -2;
+ if (arg1 == 0)
+ PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
+ break;
+#ifndef OPENSSL_NO_CMS
+ case ASN1_PKEY_CTRL_CMS_SIGN:
+ if (arg1 == 0)
+ return rsa_cms_sign(arg2);
+ else if (arg1 == 1)
+ return rsa_cms_verify(arg2);
+ break;
+
+ case ASN1_PKEY_CTRL_CMS_ENVELOPE:
+ if (pkey_is_pss(pkey))
+ return -2;
+ if (arg1 == 0)
+ return rsa_cms_encrypt(arg2);
+ else if (arg1 == 1)
+ return rsa_cms_decrypt(arg2);
+ break;
+
+ case ASN1_PKEY_CTRL_CMS_RI_TYPE:
+ if (pkey_is_pss(pkey))
+ return -2;
+ *(int *)arg2 = CMS_RECIPINFO_TRANS;
+ return 1;
+#endif
+
+ case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
+ if (pkey->pkey.rsa->pss != NULL) {
+ if (!rsa_pss_get_param(pkey->pkey.rsa->pss, &md, &mgf1md,
+ &min_saltlen)) {
+ RSAerr(0, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ *(int *)arg2 = EVP_MD_type(md);
+ /* Return of 2 indicates this MD is mandatory */
+ return 2;
+ }
+ *(int *)arg2 = NID_sha256;
+ return 1;
+
+ default:
+ return -2;
+
+ }
+
+ if (alg)
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
+
+ return 1;
+
+}
+
+/* allocate and set algorithm ID from EVP_MD, default SHA1 */
+static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
+{
+ if (md == NULL || EVP_MD_type(md) == NID_sha1)
+ return 1;
+ *palg = X509_ALGOR_new();
+ if (*palg == NULL)
+ return 0;
+ X509_ALGOR_set_md(*palg, md);
+ return 1;
+}
+
+/* Allocate and set MGF1 algorithm ID from EVP_MD */
+static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
+{
+ X509_ALGOR *algtmp = NULL;
+ ASN1_STRING *stmp = NULL;
+
+ *palg = NULL;
+ if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
+ return 1;
+ /* need to embed algorithm ID inside another */
+ if (!rsa_md_to_algor(&algtmp, mgf1md))
+ goto err;
+ if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
+ goto err;
+ *palg = X509_ALGOR_new();
+ if (*palg == NULL)
+ goto err;
+ X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
+ stmp = NULL;
+ err:
+ ASN1_STRING_free(stmp);
+ X509_ALGOR_free(algtmp);
+ if (*palg)
+ return 1;
+ return 0;
+}
+
+/* convert algorithm ID to EVP_MD, default SHA1 */
+static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
+{
+ const EVP_MD *md;
+
+ if (!alg)
+ return EVP_sha1();
+ md = EVP_get_digestbyobj(alg->algorithm);
+ if (md == NULL)
+ RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
+ return md;
+}
+
+/*
+ * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
+ * suitable for setting an AlgorithmIdentifier.
+ */
+
+static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
+{
+ const EVP_MD *sigmd, *mgf1md;
+ EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
+ RSA *rsa = EVP_PKEY_get0_RSA(pk);
+ int saltlen;
+
+ if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
+ return NULL;
+ if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
+ return NULL;
+ if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
+ return NULL;
+ if (saltlen == -1) {
+ saltlen = EVP_MD_size(sigmd);
+ } else if (saltlen == -2 || saltlen == -3) {
+ saltlen = RSA_size(rsa) - EVP_MD_size(sigmd) - 2;
+ if ((EVP_PKEY_bits(pk) & 0x7) == 1)
+ saltlen--;
+ if (saltlen < 0)
+ return NULL;
+ }
+
+ return rsa_pss_params_create(sigmd, mgf1md, saltlen);
+}
+
+RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
+ const EVP_MD *mgf1md, int saltlen)
+{
+ RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
+
+ if (pss == NULL)
+ goto err;
+ if (saltlen != 20) {
+ pss->saltLength = ASN1_INTEGER_new();
+ if (pss->saltLength == NULL)
+ goto err;
+ if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
+ goto err;
+ }
+ if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
+ goto err;
+ if (mgf1md == NULL)
+ mgf1md = sigmd;
+ if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
+ goto err;
+ if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
+ goto err;
+ return pss;
+ err:
+ RSA_PSS_PARAMS_free(pss);
+ return NULL;
+}
+
+static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
+{
+ RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
+ ASN1_STRING *os;
+
+ if (pss == NULL)
+ return NULL;
+
+ os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
+ RSA_PSS_PARAMS_free(pss);
+ return os;
+}
+
+/*
+ * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
+ * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
+ * passed to pkctx instead.
+ */
+
+static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
+ X509_ALGOR *sigalg, EVP_PKEY *pkey)
+{
+ int rv = -1;
+ int saltlen;
+ const EVP_MD *mgf1md = NULL, *md = NULL;
+ RSA_PSS_PARAMS *pss;
+
+ /* Sanity check: make sure it is PSS */
+ if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
+ return -1;
+ }
+ /* Decode PSS parameters */
+ pss = rsa_pss_decode(sigalg);
+
+ if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
+ goto err;
+ }
+
+ /* We have all parameters now set up context */
+ if (pkey) {
+ if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
+ goto err;
+ } else {
+ const EVP_MD *checkmd;
+ if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
+ goto err;
+ if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
+ goto err;
+ }
+ }
+
+ if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
+ goto err;
+
+ if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
+ goto err;
+
+ if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
+ goto err;
+ /* Carry on */
+ rv = 1;
+
+ err:
+ RSA_PSS_PARAMS_free(pss);
+ return rv;
+}
+
+int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
+ const EVP_MD **pmgf1md, int *psaltlen)
+{
+ if (pss == NULL)
+ return 0;
+ *pmd = rsa_algor_to_md(pss->hashAlgorithm);
+ if (*pmd == NULL)
+ return 0;
+ *pmgf1md = rsa_algor_to_md(pss->maskHash);
+ if (*pmgf1md == NULL)
+ return 0;
+ if (pss->saltLength) {
+ *psaltlen = ASN1_INTEGER_get(pss->saltLength);
+ if (*psaltlen < 0) {
+ RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
+ return 0;
+ }
+ } else {
+ *psaltlen = 20;
+ }
+
+ /*
+ * low-level routines support only trailer field 0xbc (value 1) and
+ * PKCS#1 says we should reject any other value anyway.
+ */
+ if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
+ RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
+ return 0;
+ }
+
+ return 1;
+}
+
+#ifndef OPENSSL_NO_CMS
+static int rsa_cms_verify(CMS_SignerInfo *si)
+{
+ int nid, nid2;
+ X509_ALGOR *alg;
+ EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
+
+ CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
+ nid = OBJ_obj2nid(alg->algorithm);
+ if (nid == EVP_PKEY_RSA_PSS)
+ return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
+ /* Only PSS allowed for PSS keys */
+ if (pkey_ctx_is_pss(pkctx)) {
+ RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
+ return 0;
+ }
+ if (nid == NID_rsaEncryption)
+ return 1;
+ /* Workaround for some implementation that use a signature OID */
+ if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
+ if (nid2 == NID_rsaEncryption)
+ return 1;
+ }
+ return 0;
+}
+#endif
+
+/*
+ * Customised RSA item verification routine. This is called when a signature
+ * is encountered requiring special handling. We currently only handle PSS.
+ */
+
+static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
+ X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
+ EVP_PKEY *pkey)
+{
+ /* Sanity check: make sure it is PSS */
+ if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
+ RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
+ return -1;
+ }
+ if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
+ /* Carry on */
+ return 2;
+ }
+ return -1;
+}
+
+#ifndef OPENSSL_NO_CMS
+static int rsa_cms_sign(CMS_SignerInfo *si)
+{
+ int pad_mode = RSA_PKCS1_PADDING;
+ X509_ALGOR *alg;
+ EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
+ ASN1_STRING *os = NULL;
+
+ CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
+ if (pkctx) {
+ if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
+ return 0;
+ }
+ if (pad_mode == RSA_PKCS1_PADDING) {
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
+ return 1;
+ }
+ /* We don't support it */
+ if (pad_mode != RSA_PKCS1_PSS_PADDING)
+ return 0;
+ os = rsa_ctx_to_pss_string(pkctx);
+ if (!os)
+ return 0;
+ X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
+ return 1;
+}
+#endif
+
+static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
+ X509_ALGOR *alg1, X509_ALGOR *alg2,
+ ASN1_BIT_STRING *sig)
+{
+ int pad_mode;
+ EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
+
+ if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
+ return 0;
+ if (pad_mode == RSA_PKCS1_PADDING)
+ return 2;
+ if (pad_mode == RSA_PKCS1_PSS_PADDING) {
+ ASN1_STRING *os1 = NULL;
+ os1 = rsa_ctx_to_pss_string(pkctx);
+ if (!os1)
+ return 0;
+ /* Duplicate parameters if we have to */
+ if (alg2) {
+ ASN1_STRING *os2 = ASN1_STRING_dup(os1);
+ if (!os2) {
+ ASN1_STRING_free(os1);
+ return 0;
+ }
+ X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
+ V_ASN1_SEQUENCE, os2);
+ }
+ X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
+ V_ASN1_SEQUENCE, os1);
+ return 3;
+ }
+ return 2;
+}
+
+static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
+ const ASN1_STRING *sig)
+{
+ int rv = 0;
+ int mdnid, saltlen;
+ uint32_t flags;
+ const EVP_MD *mgf1md = NULL, *md = NULL;
+ RSA_PSS_PARAMS *pss;
+ int secbits;
+
+ /* Sanity check: make sure it is PSS */
+ if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
+ return 0;
+ /* Decode PSS parameters */
+ pss = rsa_pss_decode(sigalg);
+ if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
+ goto err;
+ mdnid = EVP_MD_type(md);
+ /*
+ * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
+ * match and salt length must equal digest size
+ */
+ if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
+ && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
+ flags = X509_SIG_INFO_TLS;
+ else
+ flags = 0;
+ /* Note: security bits half number of digest bits */
+ secbits = EVP_MD_size(md) * 4;
+ /*
+ * SHA1 and MD5 are known to be broken. Reduce security bits so that
+ * they're no longer accepted at security level 1. The real values don't
+ * really matter as long as they're lower than 80, which is our security
+ * level 1.
+ * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for SHA1 at
+ * 2^63.4
+ * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
+ * puts a chosen-prefix attack for MD5 at 2^39.
+ */
+ if (mdnid == NID_sha1)
+ secbits = 64;
+ else if (mdnid == NID_md5_sha1)
+ secbits = 68;
+ else if (mdnid == NID_md5)
+ secbits = 39;
+ X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, secbits,
+ flags);
+ rv = 1;
+ err:
+ RSA_PSS_PARAMS_free(pss);
+ return rv;
+}
+
+#ifndef OPENSSL_NO_CMS
+static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
+{
+ RSA_OAEP_PARAMS *oaep;
+
+ oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
+ alg->parameter);
+
+ if (oaep == NULL)
+ return NULL;
+
+ if (oaep->maskGenFunc != NULL) {
+ oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
+ if (oaep->maskHash == NULL) {
+ RSA_OAEP_PARAMS_free(oaep);
+ return NULL;
+ }
+ }
+ return oaep;
+}
+
+static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
+{
+ EVP_PKEY_CTX *pkctx;
+ X509_ALGOR *cmsalg;
+ int nid;
+ int rv = -1;
+ unsigned char *label = NULL;
+ int labellen = 0;
+ const EVP_MD *mgf1md = NULL, *md = NULL;
+ RSA_OAEP_PARAMS *oaep;
+
+ pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
+ if (pkctx == NULL)
+ return 0;
+ if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
+ return -1;
+ nid = OBJ_obj2nid(cmsalg->algorithm);
+ if (nid == NID_rsaEncryption)
+ return 1;
+ if (nid != NID_rsaesOaep) {
+ RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
+ return -1;
+ }
+ /* Decode OAEP parameters */
+ oaep = rsa_oaep_decode(cmsalg);
+
+ if (oaep == NULL) {
+ RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
+ goto err;
+ }
+
+ mgf1md = rsa_algor_to_md(oaep->maskHash);
+ if (mgf1md == NULL)
+ goto err;
+ md = rsa_algor_to_md(oaep->hashFunc);
+ if (md == NULL)
+ goto err;
+
+ if (oaep->pSourceFunc != NULL) {
+ X509_ALGOR *plab = oaep->pSourceFunc;
+
+ if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
+ RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
+ goto err;
+ }
+ if (plab->parameter->type != V_ASN1_OCTET_STRING) {
+ RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
+ goto err;
+ }
+
+ label = plab->parameter->value.octet_string->data;
+ /* Stop label being freed when OAEP parameters are freed */
+ plab->parameter->value.octet_string->data = NULL;
+ labellen = plab->parameter->value.octet_string->length;
+ }
+
+ if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
+ goto err;
+ if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
+ goto err;
+ if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
+ goto err;
+ if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
+ goto err;
+ /* Carry on */
+ rv = 1;
+
+ err:
+ RSA_OAEP_PARAMS_free(oaep);
+ return rv;
+}
+
+static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
+{
+ const EVP_MD *md, *mgf1md;
+ RSA_OAEP_PARAMS *oaep = NULL;
+ ASN1_STRING *os = NULL;
+ X509_ALGOR *alg;
+ EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
+ int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
+ unsigned char *label;
+
+ if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
+ return 0;
+ if (pkctx) {
+ if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
+ return 0;
+ }
+ if (pad_mode == RSA_PKCS1_PADDING) {
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
+ return 1;
+ }
+ /* Not supported */
+ if (pad_mode != RSA_PKCS1_OAEP_PADDING)
+ return 0;
+ if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
+ goto err;
+ if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
+ goto err;
+ labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
+ if (labellen < 0)
+ goto err;
+ oaep = RSA_OAEP_PARAMS_new();
+ if (oaep == NULL)
+ goto err;
+ if (!rsa_md_to_algor(&oaep->hashFunc, md))
+ goto err;
+ if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
+ goto err;
+ if (labellen > 0) {
+ ASN1_OCTET_STRING *los;
+ oaep->pSourceFunc = X509_ALGOR_new();
+ if (oaep->pSourceFunc == NULL)
+ goto err;
+ los = ASN1_OCTET_STRING_new();
+ if (los == NULL)
+ goto err;
+ if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
+ ASN1_OCTET_STRING_free(los);
+ goto err;
+ }
+ X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
+ V_ASN1_OCTET_STRING, los);
+ }
+ /* create string with pss parameter encoding. */
+ if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
+ goto err;
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
+ os = NULL;
+ rv = 1;
+ err:
+ RSA_OAEP_PARAMS_free(oaep);
+ ASN1_STRING_free(os);
+ return rv;
+}
+#endif
+
+static int rsa_pkey_check(const EVP_PKEY *pkey)
+{
+ return RSA_check_key_ex(pkey->pkey.rsa, NULL);
+}
+
+static size_t rsa_pkey_dirty_cnt(const EVP_PKEY *pkey)
+{
+ return pkey->pkey.rsa->dirty_cnt;
+}
+
+DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
+
+static void *rsa_pkey_export_to(const EVP_PKEY *pk, EVP_KEYMGMT *keymgmt,
+ int want_domainparams)
+{
+ RSA *rsa = pk->pkey.rsa;
+ OSSL_PARAM_BLD tmpl;
+ const BIGNUM *n = RSA_get0_n(rsa), *e = RSA_get0_e(rsa);
+ const BIGNUM *d = RSA_get0_d(rsa);
+ STACK_OF(BIGNUM_const) *primes = NULL, *exps = NULL, *coeffs = NULL;
+ int numprimes = 0, numexps = 0, numcoeffs = 0;
+ OSSL_PARAM *params = NULL;
+ void *provkey = NULL;
+
+ /*
+ * There are no domain parameters for RSA keys, or rather, they are
+ * included in the key data itself.
+ */
+ if (want_domainparams)
+ goto err;
+
+ /* Get all the primes and CRT params */
+ if ((primes = sk_BIGNUM_const_new_null()) == NULL
+ || (exps = sk_BIGNUM_const_new_null()) == NULL
+ || (coeffs = sk_BIGNUM_const_new_null()) == NULL)
+ goto err;
+
+ if (!rsa_get0_all_params(rsa, primes, exps, coeffs))
+ goto err;
+
+ /* Public parameters must always be present */
+ if (n == NULL || e == NULL)
+ goto err;
+
+ if (d != NULL) {
+ /* It's a private key, so we should have everything else too */
+ numprimes = sk_BIGNUM_const_num(primes);
+ numexps = sk_BIGNUM_const_num(exps);
+ numcoeffs = sk_BIGNUM_const_num(coeffs);
+
+ if (numprimes < 2 || numexps < 2 || numcoeffs < 1)
+ goto err;
+
+ /* assert that an OSSL_PARAM_BLD has enough space. */
+ if (!ossl_assert(/* n, e */ 2 + /* d */ 1 + /* numprimes */ 1
+ + numprimes + numexps + numcoeffs
+ <= OSSL_PARAM_BLD_MAX))
+ goto err;
+ }
+
+ ossl_param_bld_init(&tmpl);
+ if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_N, n)
+ || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_E, e))
+ goto err;
+
+ if (d != NULL) {
+ int i;
+
+ if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_D, d))
+ goto err;
+
+ for (i = 0; i < numprimes; i++) {
+ const BIGNUM *num = sk_BIGNUM_const_value(primes, i);
+
+ if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_FACTOR,
+ num))
+ goto err;
+ }
+
+ for (i = 0; i < numexps; i++) {
+ const BIGNUM *num = sk_BIGNUM_const_value(exps, i);
+
+ if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_EXPONENT,
+ num))
+ goto err;
+ }
+
+ for (i = 0; i < numcoeffs; i++) {
+ const BIGNUM *num = sk_BIGNUM_const_value(coeffs, i);
+
+ if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_COEFFICIENT,
+ num))
+ goto err;
+ }
+ }
+
+ if ((params = ossl_param_bld_to_param(&tmpl)) == NULL)
+ goto err;
+
+ /* We export, the provider imports */
+ provkey = evp_keymgmt_importkey(keymgmt, params);
+
+ err:
+ sk_BIGNUM_const_free(primes);
+ sk_BIGNUM_const_free(exps);
+ sk_BIGNUM_const_free(coeffs);
+ ossl_param_bld_free(params);
+ return provkey;
+}
+
+const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
+ {
+ EVP_PKEY_RSA,
+ EVP_PKEY_RSA,
+ ASN1_PKEY_SIGPARAM_NULL,
+
+ "RSA",
+ "OpenSSL RSA method",
+
+ rsa_pub_decode,
+ rsa_pub_encode,
+ rsa_pub_cmp,
+ rsa_pub_print,
+
+ rsa_priv_decode,
+ rsa_priv_encode,
+ rsa_priv_print,
+
+ int_rsa_size,
+ rsa_bits,
+ rsa_security_bits,
+
+ 0, 0, 0, 0, 0, 0,
+
+ rsa_sig_print,
+ int_rsa_free,
+ rsa_pkey_ctrl,
+ old_rsa_priv_decode,
+ old_rsa_priv_encode,
+ rsa_item_verify,
+ rsa_item_sign,
+ rsa_sig_info_set,
+ rsa_pkey_check,
+
+ 0, 0,
+ 0, 0, 0, 0,
+
+ rsa_pkey_dirty_cnt,
+ rsa_pkey_export_to
+ },
+
+ {
+ EVP_PKEY_RSA2,
+ EVP_PKEY_RSA,
+ ASN1_PKEY_ALIAS}
+};
+
+const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
+ EVP_PKEY_RSA_PSS,
+ EVP_PKEY_RSA_PSS,
+ ASN1_PKEY_SIGPARAM_NULL,
+
+ "RSA-PSS",
+ "OpenSSL RSA-PSS method",
+
+ rsa_pub_decode,
+ rsa_pub_encode,
+ rsa_pub_cmp,
+ rsa_pub_print,
+
+ rsa_priv_decode,
+ rsa_priv_encode,
+ rsa_priv_print,
+
+ int_rsa_size,
+ rsa_bits,
+ rsa_security_bits,
+
+ 0, 0, 0, 0, 0, 0,
+
+ rsa_sig_print,
+ int_rsa_free,
+ rsa_pkey_ctrl,
+ 0, 0,
+ rsa_item_verify,
+ rsa_item_sign,
+ 0,
+ rsa_pkey_check,
+
+ 0, 0,
+ 0, 0, 0, 0,
+
+ rsa_pkey_dirty_cnt,
+ rsa_pkey_export_to
+};
projects / openssl.git / blobdiff