ref: 2cdc6577ef8a251bf1740439cf5bfc47050dab41
dir: /third_party/boringssl/src/crypto/evp/p_rsa_asn1.c/
/* Written by Dr Stephen N Henson (steve@openssl.org) 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). */
#include <openssl/evp.h>
#include <openssl/bn.h>
#include <openssl/bytestring.h>
#include <openssl/digest.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/rsa.h>
#include "../fipsmodule/rsa/internal.h"
#include "internal.h"
static int rsa_pub_encode(CBB *out, const EVP_PKEY *key) {
// See RFC 3279, section 2.3.1.
CBB spki, algorithm, oid, null, key_bitstring;
if (!CBB_add_asn1(out, &spki, CBS_ASN1_SEQUENCE) ||
!CBB_add_asn1(&spki, &algorithm, CBS_ASN1_SEQUENCE) ||
!CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
!CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
!CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
!CBB_add_asn1(&spki, &key_bitstring, CBS_ASN1_BITSTRING) ||
!CBB_add_u8(&key_bitstring, 0 /* padding */) ||
!RSA_marshal_public_key(&key_bitstring, key->pkey.rsa) ||
!CBB_flush(out)) {
OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
return 0;
}
return 1;
}
static int rsa_pub_decode(EVP_PKEY *out, CBS *params, CBS *key) {
// See RFC 3279, section 2.3.1.
// The parameters must be NULL.
CBS null;
if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) ||
CBS_len(&null) != 0 ||
CBS_len(params) != 0) {
OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
return 0;
}
RSA *rsa = RSA_parse_public_key(key);
if (rsa == NULL || CBS_len(key) != 0) {
OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
RSA_free(rsa);
return 0;
}
EVP_PKEY_assign_RSA(out, rsa);
return 1;
}
static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
return BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) == 0 &&
BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) == 0;
}
static int rsa_priv_encode(CBB *out, const EVP_PKEY *key) {
CBB pkcs8, algorithm, oid, null, private_key;
if (!CBB_add_asn1(out, &pkcs8, CBS_ASN1_SEQUENCE) ||
!CBB_add_asn1_uint64(&pkcs8, 0 /* version */) ||
!CBB_add_asn1(&pkcs8, &algorithm, CBS_ASN1_SEQUENCE) ||
!CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
!CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
!CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
!CBB_add_asn1(&pkcs8, &private_key, CBS_ASN1_OCTETSTRING) ||
!RSA_marshal_private_key(&private_key, key->pkey.rsa) ||
!CBB_flush(out)) {
OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
return 0;
}
return 1;
}
static int rsa_priv_decode(EVP_PKEY *out, CBS *params, CBS *key) {
// Per RFC 3447, A.1, the parameters have type NULL.
CBS null;
if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) ||
CBS_len(&null) != 0 ||
CBS_len(params) != 0) {
OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
return 0;
}
RSA *rsa = RSA_parse_private_key(key);
if (rsa == NULL || CBS_len(key) != 0) {
OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
RSA_free(rsa);
return 0;
}
EVP_PKEY_assign_RSA(out, rsa);
return 1;
}
static int rsa_opaque(const EVP_PKEY *pkey) {
return RSA_is_opaque(pkey->pkey.rsa);
}
static int int_rsa_size(const EVP_PKEY *pkey) {
return RSA_size(pkey->pkey.rsa);
}
static int rsa_bits(const EVP_PKEY *pkey) {
return RSA_bits(pkey->pkey.rsa);
}
static void int_rsa_free(EVP_PKEY *pkey) { RSA_free(pkey->pkey.rsa); }
const EVP_PKEY_ASN1_METHOD rsa_asn1_meth = {
EVP_PKEY_RSA,
// 1.2.840.113549.1.1.1
{0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01}, 9,
rsa_pub_decode,
rsa_pub_encode,
rsa_pub_cmp,
rsa_priv_decode,
rsa_priv_encode,
NULL /* set_priv_raw */,
NULL /* set_pub_raw */,
NULL /* get_priv_raw */,
NULL /* get_pub_raw */,
rsa_opaque,
int_rsa_size,
rsa_bits,
0,0,0,
int_rsa_free,
};