187 lines
6.1 KiB
C
187 lines
6.1 KiB
C
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/* $OpenBSD: a_pkey.c,v 1.3 2021/12/25 13:17:48 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/asn1.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#ifndef OPENSSL_NO_ENGINE
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#include <openssl/engine.h>
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#endif
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#include "asn1_locl.h"
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#include "evp_locl.h"
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EVP_PKEY *
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d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp, long length)
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{
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const unsigned char *p = *pp;
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EVP_PKEY *ret;
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if ((a == NULL) || (*a == NULL)) {
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if ((ret = EVP_PKEY_new()) == NULL) {
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ASN1error(ERR_R_EVP_LIB);
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return (NULL);
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}
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} else {
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ret = *a;
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(ret->engine);
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ret->engine = NULL;
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#endif
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}
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if (!EVP_PKEY_set_type(ret, type)) {
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ASN1error(ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
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goto err;
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}
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if (!ret->ameth->old_priv_decode ||
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!ret->ameth->old_priv_decode(ret, pp, length)) {
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if (ret->ameth->priv_decode) {
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PKCS8_PRIV_KEY_INFO *p8 = NULL;
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*pp = p; /* XXX */
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p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, pp, length);
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if (!p8)
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goto err;
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EVP_PKEY_free(ret);
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ret = EVP_PKCS82PKEY(p8);
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PKCS8_PRIV_KEY_INFO_free(p8);
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} else {
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ASN1error(ERR_R_ASN1_LIB);
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goto err;
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}
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}
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if (a != NULL)
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(*a) = ret;
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return (ret);
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err:
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if (a == NULL || *a != ret)
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EVP_PKEY_free(ret);
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return (NULL);
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}
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int
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i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp)
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{
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if (a->ameth && a->ameth->old_priv_encode) {
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return a->ameth->old_priv_encode(a, pp);
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}
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if (a->ameth && a->ameth->priv_encode) {
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PKCS8_PRIV_KEY_INFO *p8 = EVP_PKEY2PKCS8(a);
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int ret = i2d_PKCS8_PRIV_KEY_INFO(p8, pp);
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PKCS8_PRIV_KEY_INFO_free(p8);
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return ret;
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}
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ASN1error(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
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return (-1);
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}
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/* This works like d2i_PrivateKey() except it automatically works out the type */
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EVP_PKEY *
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d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp, long length)
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{
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STACK_OF(ASN1_TYPE) *inkey;
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const unsigned char *p;
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int keytype;
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p = *pp;
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/* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
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* by analyzing it we can determine the passed structure: this
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* assumes the input is surrounded by an ASN1 SEQUENCE.
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*/
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inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
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/* Since we only need to discern "traditional format" RSA and DSA
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* keys we can just count the elements.
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*/
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if (sk_ASN1_TYPE_num(inkey) == 6)
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keytype = EVP_PKEY_DSA;
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else if (sk_ASN1_TYPE_num(inkey) == 4)
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keytype = EVP_PKEY_EC;
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else if (sk_ASN1_TYPE_num(inkey) == 3) {
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/* This seems to be PKCS8, not traditional format */
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PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(
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NULL, pp, length);
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EVP_PKEY *ret;
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sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
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if (!p8) {
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ASN1error(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
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return NULL;
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}
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ret = EVP_PKCS82PKEY(p8);
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PKCS8_PRIV_KEY_INFO_free(p8);
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if (a) {
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*a = ret;
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}
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return ret;
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} else
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keytype = EVP_PKEY_RSA;
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sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
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return d2i_PrivateKey(keytype, a, pp, length);
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}
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