438 lines
9.9 KiB
C
438 lines
9.9 KiB
C
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/* $OpenBSD: x_pubkey.c,v 1.27 2018/03/17 14:55:39 jsing Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <openssl/opensslconf.h>
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#include <openssl/asn1t.h>
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#include <openssl/err.h>
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#include <openssl/x509.h>
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#ifndef OPENSSL_NO_DSA
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#include <openssl/dsa.h>
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#endif
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#ifndef OPENSSL_NO_RSA
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#include <openssl/rsa.h>
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#endif
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#include "asn1_locl.h"
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/* Minor tweak to operation: free up EVP_PKEY */
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static int
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pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
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{
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if (operation == ASN1_OP_FREE_POST) {
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X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
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EVP_PKEY_free(pubkey->pkey);
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}
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return 1;
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}
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static const ASN1_AUX X509_PUBKEY_aux = {
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.asn1_cb = pubkey_cb,
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};
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static const ASN1_TEMPLATE X509_PUBKEY_seq_tt[] = {
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{
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.offset = offsetof(X509_PUBKEY, algor),
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.field_name = "algor",
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.item = &X509_ALGOR_it,
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},
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{
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.offset = offsetof(X509_PUBKEY, public_key),
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.field_name = "public_key",
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.item = &ASN1_BIT_STRING_it,
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},
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};
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const ASN1_ITEM X509_PUBKEY_it = {
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.itype = ASN1_ITYPE_SEQUENCE,
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.utype = V_ASN1_SEQUENCE,
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.templates = X509_PUBKEY_seq_tt,
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.tcount = sizeof(X509_PUBKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
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.funcs = &X509_PUBKEY_aux,
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.size = sizeof(X509_PUBKEY),
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.sname = "X509_PUBKEY",
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};
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X509_PUBKEY *
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d2i_X509_PUBKEY(X509_PUBKEY **a, const unsigned char **in, long len)
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{
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return (X509_PUBKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
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&X509_PUBKEY_it);
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}
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int
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i2d_X509_PUBKEY(X509_PUBKEY *a, unsigned char **out)
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{
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return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_PUBKEY_it);
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}
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X509_PUBKEY *
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X509_PUBKEY_new(void)
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{
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return (X509_PUBKEY *)ASN1_item_new(&X509_PUBKEY_it);
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}
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void
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X509_PUBKEY_free(X509_PUBKEY *a)
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{
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ASN1_item_free((ASN1_VALUE *)a, &X509_PUBKEY_it);
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}
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int
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X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
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{
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X509_PUBKEY *pk = NULL;
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if (x == NULL)
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return (0);
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if ((pk = X509_PUBKEY_new()) == NULL)
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goto error;
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if (pkey->ameth) {
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if (pkey->ameth->pub_encode) {
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if (!pkey->ameth->pub_encode(pk, pkey)) {
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X509error(X509_R_PUBLIC_KEY_ENCODE_ERROR);
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goto error;
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}
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} else {
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X509error(X509_R_METHOD_NOT_SUPPORTED);
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goto error;
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}
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} else {
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X509error(X509_R_UNSUPPORTED_ALGORITHM);
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goto error;
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}
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if (*x != NULL)
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X509_PUBKEY_free(*x);
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*x = pk;
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return 1;
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error:
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if (pk != NULL)
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X509_PUBKEY_free(pk);
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return 0;
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}
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EVP_PKEY *
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X509_PUBKEY_get0(X509_PUBKEY *key)
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{
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EVP_PKEY *ret = NULL;
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if (key == NULL)
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goto error;
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if (key->pkey != NULL)
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return key->pkey;
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if (key->public_key == NULL)
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goto error;
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if ((ret = EVP_PKEY_new()) == NULL) {
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X509error(ERR_R_MALLOC_FAILURE);
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goto error;
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}
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if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) {
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X509error(X509_R_UNSUPPORTED_ALGORITHM);
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goto error;
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}
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if (ret->ameth->pub_decode) {
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if (!ret->ameth->pub_decode(ret, key)) {
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X509error(X509_R_PUBLIC_KEY_DECODE_ERROR);
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goto error;
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}
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} else {
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X509error(X509_R_METHOD_NOT_SUPPORTED);
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goto error;
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}
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/* Check to see if another thread set key->pkey first */
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CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
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if (key->pkey) {
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CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
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EVP_PKEY_free(ret);
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ret = key->pkey;
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} else {
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key->pkey = ret;
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CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
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}
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return ret;
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error:
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EVP_PKEY_free(ret);
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return (NULL);
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}
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EVP_PKEY *
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X509_PUBKEY_get(X509_PUBKEY *key)
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{
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EVP_PKEY *pkey;
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if ((pkey = X509_PUBKEY_get0(key)) == NULL)
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return (NULL);
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CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
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return pkey;
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}
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/* Now two pseudo ASN1 routines that take an EVP_PKEY structure
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* and encode or decode as X509_PUBKEY
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*/
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EVP_PKEY *
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d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length)
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{
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X509_PUBKEY *xpk;
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EVP_PKEY *pktmp;
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xpk = d2i_X509_PUBKEY(NULL, pp, length);
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if (!xpk)
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return NULL;
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pktmp = X509_PUBKEY_get(xpk);
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X509_PUBKEY_free(xpk);
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if (!pktmp)
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return NULL;
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if (a) {
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EVP_PKEY_free(*a);
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*a = pktmp;
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}
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return pktmp;
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}
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int
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i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
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{
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X509_PUBKEY *xpk = NULL;
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int ret;
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if (!a)
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return 0;
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if (!X509_PUBKEY_set(&xpk, a))
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return 0;
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ret = i2d_X509_PUBKEY(xpk, pp);
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X509_PUBKEY_free(xpk);
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return ret;
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}
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/* The following are equivalents but which return RSA and DSA
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* keys
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*/
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#ifndef OPENSSL_NO_RSA
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RSA *
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d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length)
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{
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EVP_PKEY *pkey;
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RSA *key;
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const unsigned char *q;
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q = *pp;
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pkey = d2i_PUBKEY(NULL, &q, length);
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if (!pkey)
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return NULL;
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key = EVP_PKEY_get1_RSA(pkey);
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EVP_PKEY_free(pkey);
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if (!key)
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return NULL;
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*pp = q;
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if (a) {
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RSA_free(*a);
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*a = key;
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}
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return key;
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}
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int
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i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
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{
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EVP_PKEY *pktmp;
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int ret;
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if (!a)
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return 0;
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pktmp = EVP_PKEY_new();
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if (!pktmp) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return 0;
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}
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EVP_PKEY_set1_RSA(pktmp, a);
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ret = i2d_PUBKEY(pktmp, pp);
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EVP_PKEY_free(pktmp);
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return ret;
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}
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#endif
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#ifndef OPENSSL_NO_DSA
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DSA *
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d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length)
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{
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EVP_PKEY *pkey;
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DSA *key;
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const unsigned char *q;
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q = *pp;
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pkey = d2i_PUBKEY(NULL, &q, length);
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if (!pkey)
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return NULL;
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key = EVP_PKEY_get1_DSA(pkey);
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EVP_PKEY_free(pkey);
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if (!key)
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return NULL;
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*pp = q;
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if (a) {
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DSA_free(*a);
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*a = key;
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}
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return key;
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}
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int
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i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
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{
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EVP_PKEY *pktmp;
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int ret;
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if (!a)
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return 0;
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pktmp = EVP_PKEY_new();
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if (!pktmp) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return 0;
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}
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EVP_PKEY_set1_DSA(pktmp, a);
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ret = i2d_PUBKEY(pktmp, pp);
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EVP_PKEY_free(pktmp);
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return ret;
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}
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#endif
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#ifndef OPENSSL_NO_EC
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EC_KEY *
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d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
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{
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EVP_PKEY *pkey;
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EC_KEY *key;
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const unsigned char *q;
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q = *pp;
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pkey = d2i_PUBKEY(NULL, &q, length);
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if (!pkey)
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||
|
|
return (NULL);
|
||
|
|
key = EVP_PKEY_get1_EC_KEY(pkey);
|
||
|
|
EVP_PKEY_free(pkey);
|
||
|
|
if (!key)
|
||
|
|
return (NULL);
|
||
|
|
*pp = q;
|
||
|
|
if (a) {
|
||
|
|
EC_KEY_free(*a);
|
||
|
|
*a = key;
|
||
|
|
}
|
||
|
|
return (key);
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
|
||
|
|
{
|
||
|
|
EVP_PKEY *pktmp;
|
||
|
|
int ret;
|
||
|
|
if (!a)
|
||
|
|
return (0);
|
||
|
|
if ((pktmp = EVP_PKEY_new()) == NULL) {
|
||
|
|
ASN1error(ERR_R_MALLOC_FAILURE);
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
EVP_PKEY_set1_EC_KEY(pktmp, a);
|
||
|
|
ret = i2d_PUBKEY(pktmp, pp);
|
||
|
|
EVP_PKEY_free(pktmp);
|
||
|
|
return (ret);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int
|
||
|
|
X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype,
|
||
|
|
void *pval, unsigned char *penc, int penclen)
|
||
|
|
{
|
||
|
|
if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
|
||
|
|
return 0;
|
||
|
|
if (penc) {
|
||
|
|
free(pub->public_key->data);
|
||
|
|
pub->public_key->data = penc;
|
||
|
|
pub->public_key->length = penclen;
|
||
|
|
/* Set number of unused bits to zero */
|
||
|
|
pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
|
||
|
|
pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT;
|
||
|
|
}
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk,
|
||
|
|
int *ppklen, X509_ALGOR **pa, X509_PUBKEY *pub)
|
||
|
|
{
|
||
|
|
if (ppkalg)
|
||
|
|
*ppkalg = pub->algor->algorithm;
|
||
|
|
if (pk) {
|
||
|
|
*pk = pub->public_key->data;
|
||
|
|
*ppklen = pub->public_key->length;
|
||
|
|
}
|
||
|
|
if (pa)
|
||
|
|
*pa = pub->algor;
|
||
|
|
return 1;
|
||
|
|
}
|