d2i_pr.c
上传用户:yisoukefu
上传日期:2020-08-09
资源大小:39506k
文件大小:6k
- /* crypto/asn1/d2i_pr.c */
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
- #include <stdio.h>
- #include "cryptlib.h"
- #include <openssl/bn.h>
- #include <openssl/evp.h>
- #include <openssl/objects.h>
- #include <openssl/asn1.h>
- #ifndef OPENSSL_NO_RSA
- #include <openssl/rsa.h>
- #endif
- #ifndef OPENSSL_NO_DSA
- #include <openssl/dsa.h>
- #endif
- #ifndef OPENSSL_NO_EC
- #include <openssl/ec.h>
- #endif
- EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
- long length)
- {
- EVP_PKEY *ret;
- if ((a == NULL) || (*a == NULL))
- {
- if ((ret=EVP_PKEY_new()) == NULL)
- {
- ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB);
- return(NULL);
- }
- }
- else ret= *a;
- ret->save_type=type;
- ret->type=EVP_PKEY_type(type);
- switch (ret->type)
- {
- #ifndef OPENSSL_NO_RSA
- case EVP_PKEY_RSA:
- if ((ret->pkey.rsa=d2i_RSAPrivateKey(NULL,
- (const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */
- {
- ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
- goto err;
- }
- break;
- #endif
- #ifndef OPENSSL_NO_DSA
- case EVP_PKEY_DSA:
- if ((ret->pkey.dsa=d2i_DSAPrivateKey(NULL,
- (const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */
- {
- ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
- goto err;
- }
- break;
- #endif
- #ifndef OPENSSL_NO_EC
- case EVP_PKEY_EC:
- if ((ret->pkey.ec = d2i_ECPrivateKey(NULL,
- (const unsigned char **)pp, length)) == NULL)
- {
- ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_ASN1_LIB);
- goto err;
- }
- break;
- #endif
- default:
- ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
- goto err;
- /* break; */
- }
- if (a != NULL) (*a)=ret;
- return(ret);
- err:
- if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);
- return(NULL);
- }
- /* This works like d2i_PrivateKey() except it automatically works out the type */
- EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
- long length)
- {
- STACK_OF(ASN1_TYPE) *inkey;
- const unsigned char *p;
- int keytype;
- p = *pp;
- /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
- * by analyzing it we can determine the passed structure: this
- * assumes the input is surrounded by an ASN1 SEQUENCE.
- */
- inkey = d2i_ASN1_SET_OF_ASN1_TYPE(NULL, &p, length, d2i_ASN1_TYPE,
- ASN1_TYPE_free, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
- /* Since we only need to discern "traditional format" RSA and DSA
- * keys we can just count the elements.
- */
- if(sk_ASN1_TYPE_num(inkey) == 6)
- keytype = EVP_PKEY_DSA;
- else if (sk_ASN1_TYPE_num(inkey) == 4)
- keytype = EVP_PKEY_EC;
- else keytype = EVP_PKEY_RSA;
- sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
- return d2i_PrivateKey(keytype, a, pp, length);
- }