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433 lines
12 KiB
C
433 lines
12 KiB
C
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/* $OpenBSD: n_pkey.c,v 1.32 2018/08/05 13:35:45 bcook 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 <string.h>
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#include <openssl/opensslconf.h>
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#ifndef OPENSSL_NO_RSA
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#include <openssl/asn1t.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/rsa.h>
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#include <openssl/x509.h>
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#ifndef OPENSSL_NO_RC4
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typedef struct netscape_pkey_st {
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long version;
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X509_ALGOR *algor;
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ASN1_OCTET_STRING *private_key;
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} NETSCAPE_PKEY;
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typedef struct netscape_encrypted_pkey_st {
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ASN1_OCTET_STRING *os;
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/* This is the same structure as DigestInfo so use it:
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* although this isn't really anything to do with
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* digests.
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*/
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X509_SIG *enckey;
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} NETSCAPE_ENCRYPTED_PKEY;
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static const ASN1_AUX NETSCAPE_ENCRYPTED_PKEY_aux = {
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.flags = ASN1_AFLG_BROKEN,
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};
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static const ASN1_TEMPLATE NETSCAPE_ENCRYPTED_PKEY_seq_tt[] = {
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{
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.offset = offsetof(NETSCAPE_ENCRYPTED_PKEY, os),
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.field_name = "os",
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.item = &ASN1_OCTET_STRING_it,
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},
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{
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.offset = offsetof(NETSCAPE_ENCRYPTED_PKEY, enckey),
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.field_name = "enckey",
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.item = &X509_SIG_it,
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},
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};
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const ASN1_ITEM NETSCAPE_ENCRYPTED_PKEY_it = {
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.itype = ASN1_ITYPE_SEQUENCE,
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.utype = V_ASN1_SEQUENCE,
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.templates = NETSCAPE_ENCRYPTED_PKEY_seq_tt,
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.tcount = sizeof(NETSCAPE_ENCRYPTED_PKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
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.funcs = &NETSCAPE_ENCRYPTED_PKEY_aux,
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.size = sizeof(NETSCAPE_ENCRYPTED_PKEY),
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.sname = "NETSCAPE_ENCRYPTED_PKEY",
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};
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NETSCAPE_ENCRYPTED_PKEY *NETSCAPE_ENCRYPTED_PKEY_new(void);
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void NETSCAPE_ENCRYPTED_PKEY_free(NETSCAPE_ENCRYPTED_PKEY *a);
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NETSCAPE_ENCRYPTED_PKEY *d2i_NETSCAPE_ENCRYPTED_PKEY(NETSCAPE_ENCRYPTED_PKEY **a, const unsigned char **in, long len);
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int i2d_NETSCAPE_ENCRYPTED_PKEY(const NETSCAPE_ENCRYPTED_PKEY *a, unsigned char **out);
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NETSCAPE_ENCRYPTED_PKEY *
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d2i_NETSCAPE_ENCRYPTED_PKEY(NETSCAPE_ENCRYPTED_PKEY **a, const unsigned char **in, long len)
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{
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return (NETSCAPE_ENCRYPTED_PKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
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&NETSCAPE_ENCRYPTED_PKEY_it);
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}
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int
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i2d_NETSCAPE_ENCRYPTED_PKEY(const NETSCAPE_ENCRYPTED_PKEY *a, unsigned char **out)
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{
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return ASN1_item_i2d((ASN1_VALUE *)a, out, &NETSCAPE_ENCRYPTED_PKEY_it);
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}
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NETSCAPE_ENCRYPTED_PKEY *
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NETSCAPE_ENCRYPTED_PKEY_new(void)
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{
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return (NETSCAPE_ENCRYPTED_PKEY *)ASN1_item_new(&NETSCAPE_ENCRYPTED_PKEY_it);
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}
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void
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NETSCAPE_ENCRYPTED_PKEY_free(NETSCAPE_ENCRYPTED_PKEY *a)
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{
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ASN1_item_free((ASN1_VALUE *)a, &NETSCAPE_ENCRYPTED_PKEY_it);
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}
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static const ASN1_TEMPLATE NETSCAPE_PKEY_seq_tt[] = {
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{
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.offset = offsetof(NETSCAPE_PKEY, version),
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.field_name = "version",
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.item = &LONG_it,
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},
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{
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.offset = offsetof(NETSCAPE_PKEY, 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(NETSCAPE_PKEY, private_key),
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.field_name = "private_key",
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.item = &ASN1_OCTET_STRING_it,
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},
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};
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const ASN1_ITEM NETSCAPE_PKEY_it = {
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.itype = ASN1_ITYPE_SEQUENCE,
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.utype = V_ASN1_SEQUENCE,
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.templates = NETSCAPE_PKEY_seq_tt,
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.tcount = sizeof(NETSCAPE_PKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
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.size = sizeof(NETSCAPE_PKEY),
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.sname = "NETSCAPE_PKEY",
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};
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NETSCAPE_PKEY *NETSCAPE_PKEY_new(void);
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void NETSCAPE_PKEY_free(NETSCAPE_PKEY *a);
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NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, const unsigned char **in, long len);
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int i2d_NETSCAPE_PKEY(const NETSCAPE_PKEY *a, unsigned char **out);
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NETSCAPE_PKEY *
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d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, const unsigned char **in, long len)
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{
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return (NETSCAPE_PKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
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&NETSCAPE_PKEY_it);
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}
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int
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i2d_NETSCAPE_PKEY(const NETSCAPE_PKEY *a, unsigned char **out)
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{
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return ASN1_item_i2d((ASN1_VALUE *)a, out, &NETSCAPE_PKEY_it);
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}
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NETSCAPE_PKEY *
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NETSCAPE_PKEY_new(void)
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{
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return (NETSCAPE_PKEY *)ASN1_item_new(&NETSCAPE_PKEY_it);
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}
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void
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NETSCAPE_PKEY_free(NETSCAPE_PKEY *a)
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{
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ASN1_item_free((ASN1_VALUE *)a, &NETSCAPE_PKEY_it);
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}
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static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
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int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey);
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int
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i2d_Netscape_RSA(const RSA *a, unsigned char **pp,
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int (*cb)(char *buf, int len, const char *prompt, int verify))
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{
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return i2d_RSA_NET(a, pp, cb, 0);
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}
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int
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i2d_RSA_NET(const RSA *a, unsigned char **pp,
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int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey)
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{
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int i, j, ret = 0;
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int rsalen, pkeylen, olen;
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NETSCAPE_PKEY *pkey = NULL;
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NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
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unsigned char buf[256], *zz;
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unsigned char key[EVP_MAX_KEY_LENGTH];
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EVP_CIPHER_CTX ctx;
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EVP_CIPHER_CTX_init(&ctx);
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if (a == NULL)
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return (0);
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if ((pkey = NETSCAPE_PKEY_new()) == NULL)
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goto err;
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if ((enckey = NETSCAPE_ENCRYPTED_PKEY_new()) == NULL)
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goto err;
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pkey->version = 0;
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pkey->algor->algorithm = OBJ_nid2obj(NID_rsaEncryption);
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if ((pkey->algor->parameter = ASN1_TYPE_new()) == NULL)
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goto err;
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pkey->algor->parameter->type = V_ASN1_NULL;
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rsalen = i2d_RSAPrivateKey(a, NULL);
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/* Fake some octet strings just for the initial length
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* calculation.
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*/
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pkey->private_key->length = rsalen;
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pkeylen = i2d_NETSCAPE_PKEY(pkey, NULL);
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enckey->enckey->digest->length = pkeylen;
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enckey->os->length = 11; /* "private-key" */
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enckey->enckey->algor->algorithm = OBJ_nid2obj(NID_rc4);
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if ((enckey->enckey->algor->parameter = ASN1_TYPE_new()) == NULL)
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goto err;
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enckey->enckey->algor->parameter->type = V_ASN1_NULL;
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if (pp == NULL) {
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olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL);
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NETSCAPE_PKEY_free(pkey);
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NETSCAPE_ENCRYPTED_PKEY_free(enckey);
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return olen;
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}
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/* Since its RC4 encrypted length is actual length */
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if ((zz = malloc(rsalen)) == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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pkey->private_key->data = zz;
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/* Write out private key encoding */
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i2d_RSAPrivateKey(a, &zz);
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if ((zz = malloc(pkeylen)) == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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enckey->enckey->digest->data = zz;
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if (!ASN1_STRING_set(enckey->os, "private-key", -1)) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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i2d_NETSCAPE_PKEY(pkey, &zz);
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/* Wipe the private key encoding */
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explicit_bzero(pkey->private_key->data, rsalen);
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if (cb == NULL)
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cb = EVP_read_pw_string;
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i = cb((char *)buf, sizeof(buf), "Enter Private Key password:", 1);
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if (i != 0) {
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ASN1error(ASN1_R_BAD_PASSWORD_READ);
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goto err;
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}
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i = strlen((char *)buf);
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/* If the key is used for SGC the algorithm is modified a little. */
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if (sgckey) {
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if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL))
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goto err;
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memcpy(buf + 16, "SGCKEYSALT", 10);
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i = 26;
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}
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if (!EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i,1, key, NULL))
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goto err;
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explicit_bzero(buf, sizeof(buf));
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/* Encrypt private key in place */
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zz = enckey->enckey->digest->data;
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if (!EVP_EncryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL))
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goto err;
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if (!EVP_EncryptUpdate(&ctx, zz, &i, zz, pkeylen))
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goto err;
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if (!EVP_EncryptFinal_ex(&ctx, zz + i, &j))
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goto err;
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ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp);
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err:
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EVP_CIPHER_CTX_cleanup(&ctx);
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NETSCAPE_ENCRYPTED_PKEY_free(enckey);
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NETSCAPE_PKEY_free(pkey);
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return (ret);
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}
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RSA *
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d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length,
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int (*cb)(char *buf, int len, const char *prompt, int verify))
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{
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return d2i_RSA_NET(a, pp, length, cb, 0);
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}
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RSA *
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d2i_RSA_NET(RSA **a, const unsigned char **pp, long length,
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int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey)
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{
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RSA *ret = NULL;
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const unsigned char *p;
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NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
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p = *pp;
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enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length);
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if (!enckey) {
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ASN1error(ASN1_R_DECODING_ERROR);
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return NULL;
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}
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/* XXX 11 == strlen("private-key") */
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if (enckey->os->length != 11 ||
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memcmp("private-key", enckey->os->data, 11) != 0) {
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ASN1error(ASN1_R_PRIVATE_KEY_HEADER_MISSING);
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goto err;
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}
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if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) {
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ASN1error(ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
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goto err;
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}
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if (cb == NULL)
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cb = EVP_read_pw_string;
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if ((ret = d2i_RSA_NET_2(a, enckey->enckey->digest, cb,
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sgckey)) == NULL)
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goto err;
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*pp = p;
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err:
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NETSCAPE_ENCRYPTED_PKEY_free(enckey);
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return ret;
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}
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static RSA *
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d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
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int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey)
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{
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NETSCAPE_PKEY *pkey = NULL;
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RSA *ret = NULL;
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int i, j;
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unsigned char buf[256];
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const unsigned char *zz;
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unsigned char key[EVP_MAX_KEY_LENGTH];
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EVP_CIPHER_CTX ctx;
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EVP_CIPHER_CTX_init(&ctx);
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i=cb((char *)buf, sizeof(buf), "Enter Private Key password:",0);
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if (i != 0) {
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ASN1error(ASN1_R_BAD_PASSWORD_READ);
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|
goto err;
|
||
|
}
|
||
|
|
||
|
i = strlen((char *)buf);
|
||
|
if (sgckey){
|
||
|
if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL))
|
||
|
goto err;
|
||
|
memcpy(buf + 16, "SGCKEYSALT", 10);
|
||
|
i = 26;
|
||
|
}
|
||
|
|
||
|
if (!EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i,1, key, NULL))
|
||
|
goto err;
|
||
|
explicit_bzero(buf, sizeof(buf));
|
||
|
|
||
|
if (!EVP_DecryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL))
|
||
|
goto err;
|
||
|
if (!EVP_DecryptUpdate(&ctx, os->data, &i, os->data, os->length))
|
||
|
goto err;
|
||
|
if (!EVP_DecryptFinal_ex(&ctx, &(os->data[i]), &j))
|
||
|
goto err;
|
||
|
os->length = i + j;
|
||
|
|
||
|
zz = os->data;
|
||
|
|
||
|
if ((pkey = d2i_NETSCAPE_PKEY(NULL, &zz, os->length)) == NULL) {
|
||
|
ASN1error(ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
|
||
|
goto err;
|
||
|
}
|
||
|
|
||
|
zz = pkey->private_key->data;
|
||
|
if ((ret = d2i_RSAPrivateKey(a, &zz,
|
||
|
pkey->private_key->length)) == NULL) {
|
||
|
ASN1error(ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
|
||
|
goto err;
|
||
|
}
|
||
|
|
||
|
err:
|
||
|
EVP_CIPHER_CTX_cleanup(&ctx);
|
||
|
NETSCAPE_PKEY_free(pkey);
|
||
|
return (ret);
|
||
|
}
|
||
|
|
||
|
#endif /* OPENSSL_NO_RC4 */
|
||
|
|
||
|
#endif
|