383 lines
11 KiB
C
Executable File
383 lines
11 KiB
C
Executable File
/* $OpenBSD: pem_info.c,v 1.24 2020/07/25 11:53:37 schwarze 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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#include <openssl/buffer.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/pem.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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STACK_OF(X509_INFO) *
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PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb,
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void *u)
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{
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BIO *b;
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STACK_OF(X509_INFO) *ret;
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if ((b = BIO_new(BIO_s_file())) == NULL) {
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PEMerror(ERR_R_BUF_LIB);
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return (0);
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}
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BIO_set_fp(b, fp, BIO_NOCLOSE);
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ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
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BIO_free(b);
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return (ret);
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}
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STACK_OF(X509_INFO) *
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PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb,
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void *u)
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{
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X509_INFO *xi = NULL;
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char *name = NULL, *header = NULL;
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void *pp;
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unsigned char *data = NULL;
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const unsigned char *p;
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long len;
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int ok = 0;
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int num_in, ptype, raw;
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STACK_OF(X509_INFO) *ret = sk;
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d2i_of_void *d2i = NULL;
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if (ret == NULL) {
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if ((ret = sk_X509_INFO_new_null()) == NULL) {
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PEMerror(ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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}
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num_in = sk_X509_INFO_num(ret);
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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for (;;) {
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raw = 0;
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ptype = 0;
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if (!PEM_read_bio(bp, &name, &header, &data, &len)) {
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if (ERR_GET_REASON(ERR_peek_last_error()) ==
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PEM_R_NO_START_LINE) {
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ERR_clear_error();
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break;
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}
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goto err;
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}
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if ((strcmp(name, PEM_STRING_X509) == 0) ||
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(strcmp(name, PEM_STRING_X509_OLD) == 0)) {
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d2i = (D2I_OF(void))d2i_X509;
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if (xi->x509 != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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}
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pp = &(xi->x509);
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} else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
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d2i = (D2I_OF(void))d2i_X509_AUX;
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if (xi->x509 != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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}
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pp = &(xi->x509);
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} else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
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d2i = (D2I_OF(void))d2i_X509_CRL;
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if (xi->crl != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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}
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pp = &(xi->crl);
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} else
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#ifndef OPENSSL_NO_RSA
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if (strcmp(name, PEM_STRING_RSA) == 0) {
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d2i = (D2I_OF(void))d2i_RSAPrivateKey;
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if (xi->x_pkey != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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}
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xi->enc_data = NULL;
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xi->enc_len = 0;
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xi->x_pkey = X509_PKEY_new();
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if (xi->x_pkey == NULL)
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goto err;
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ptype = EVP_PKEY_RSA;
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pp = &xi->x_pkey->dec_pkey;
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if (strlen(header) > 10) /* assume encrypted */
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raw = 1;
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} else
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#endif
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#ifndef OPENSSL_NO_DSA
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if (strcmp(name, PEM_STRING_DSA) == 0) {
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d2i = (D2I_OF(void))d2i_DSAPrivateKey;
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if (xi->x_pkey != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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}
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xi->enc_data = NULL;
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xi->enc_len = 0;
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xi->x_pkey = X509_PKEY_new();
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if (xi->x_pkey == NULL)
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goto err;
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ptype = EVP_PKEY_DSA;
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pp = &xi->x_pkey->dec_pkey;
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if (strlen(header) > 10) /* assume encrypted */
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raw = 1;
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} else
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#endif
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#ifndef OPENSSL_NO_EC
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if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
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d2i = (D2I_OF(void))d2i_ECPrivateKey;
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if (xi->x_pkey != NULL) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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if ((xi = X509_INFO_new()) == NULL)
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goto err;
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}
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xi->enc_data = NULL;
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xi->enc_len = 0;
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xi->x_pkey = X509_PKEY_new();
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if (xi->x_pkey == NULL)
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goto err;
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ptype = EVP_PKEY_EC;
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pp = &xi->x_pkey->dec_pkey;
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if (strlen(header) > 10) /* assume encrypted */
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raw = 1;
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} else
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#endif
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{
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d2i = NULL;
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pp = NULL;
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}
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if (d2i != NULL) {
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if (!raw) {
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EVP_CIPHER_INFO cipher;
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if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
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goto err;
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if (!PEM_do_header(&cipher, data, &len, cb, u))
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goto err;
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p = data;
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if (ptype) {
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if (!d2i_PrivateKey(ptype, pp, &p,
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len)) {
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PEMerror(ERR_R_ASN1_LIB);
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goto err;
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}
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} else if (d2i(pp, &p, len) == NULL) {
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PEMerror(ERR_R_ASN1_LIB);
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goto err;
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}
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} else { /* encrypted RSA data */
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if (!PEM_get_EVP_CIPHER_INFO(header,
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&xi->enc_cipher))
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goto err;
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xi->enc_data = (char *)data;
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xi->enc_len = (int)len;
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data = NULL;
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}
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} else {
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/* unknown */
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}
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free(name);
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free(header);
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free(data);
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name = NULL;
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header = NULL;
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data = NULL;
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}
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/* if the last one hasn't been pushed yet and there is anything
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* in it then add it to the stack ...
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*/
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if ((xi->x509 != NULL) || (xi->crl != NULL) ||
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(xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
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if (!sk_X509_INFO_push(ret, xi))
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goto err;
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xi = NULL;
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}
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ok = 1;
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err:
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if (!ok) {
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while (sk_X509_INFO_num(ret) > num_in)
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X509_INFO_free(sk_X509_INFO_pop(ret));
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if (ret != sk)
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sk_X509_INFO_free(ret);
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ret = NULL;
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}
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X509_INFO_free(xi);
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free(name);
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free(header);
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free(data);
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return ret;
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}
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/* A TJH addition */
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int
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PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
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unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
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{
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EVP_CIPHER_CTX ctx;
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int i, ret = 0;
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unsigned char *data = NULL;
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const char *objstr = NULL;
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char buf[PEM_BUFSIZE];
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unsigned char *iv = NULL;
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if (enc != NULL) {
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objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
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if (objstr == NULL) {
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PEMerror(PEM_R_UNSUPPORTED_CIPHER);
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goto err;
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}
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}
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/* now for the fun part ... if we have a private key then
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* we have to be able to handle a not-yet-decrypted key
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* being written out correctly ... if it is decrypted or
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* it is non-encrypted then we use the base code
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*/
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if (xi->x_pkey != NULL) {
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if ((xi->enc_data != NULL) && (xi->enc_len > 0) ) {
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if (enc == NULL) {
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PEMerror(PEM_R_CIPHER_IS_NULL);
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goto err;
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}
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/* copy from weirdo names into more normal things */
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iv = xi->enc_cipher.iv;
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data = (unsigned char *)xi->enc_data;
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i = xi->enc_len;
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/* we take the encryption data from the
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* internal stuff rather than what the
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* user has passed us ... as we have to
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* match exactly for some strange reason
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*/
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objstr = OBJ_nid2sn(
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EVP_CIPHER_nid(xi->enc_cipher.cipher));
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if (objstr == NULL) {
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PEMerror(PEM_R_UNSUPPORTED_CIPHER);
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goto err;
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}
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/* create the right magic header stuff */
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if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 >
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sizeof buf) {
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PEMerror(ASN1_R_BUFFER_TOO_SMALL);
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goto err;
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}
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buf[0] = '\0';
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PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
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PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
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/* use the normal code to write things out */
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i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
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if (i <= 0)
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goto err;
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} else {
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/* Add DSA/DH */
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#ifndef OPENSSL_NO_RSA
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/* normal optionally encrypted stuff */
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if (PEM_write_bio_RSAPrivateKey(bp,
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xi->x_pkey->dec_pkey->pkey.rsa,
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enc, kstr, klen, cb, u) <= 0)
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goto err;
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#endif
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}
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}
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/* if we have a certificate then write it out now */
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if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
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goto err;
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/* we are ignoring anything else that is loaded into the X509_INFO
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* structure for the moment ... as I don't need it so I'm not
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* coding it here and Eric can do it when this makes it into the
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* base library --tjh
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*/
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ret = 1;
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err:
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explicit_bzero((char *)&ctx, sizeof(ctx));
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explicit_bzero(buf, PEM_BUFSIZE);
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return (ret);
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}
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