check in v3.8.1 source
This commit is contained in:
873
crypto/pem/pem_lib.c
Normal file
873
crypto/pem/pem_lib.c
Normal file
@@ -0,0 +1,873 @@
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/* $OpenBSD: pem_lib.c,v 1.53 2023/07/07 13:40:44 beck 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 <ctype.h>
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#include <stdio.h>
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#include <stdlib.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/pkcs12.h>
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#include <openssl/x509.h>
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#ifndef OPENSSL_NO_DES
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#include <openssl/des.h>
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#endif
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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_local.h"
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#include "evp_local.h"
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#define MIN_LENGTH 4
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static int load_iv(char **fromp, unsigned char *to, int num);
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static int check_pem(const char *nm, const char *name);
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int pem_check_suffix(const char *pem_str, const char *suffix);
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/* XXX LSSL ABI XXX return value and `num' ought to be size_t */
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int
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PEM_def_callback(char *buf, int num, int w, void *key)
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{
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size_t l;
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int i;
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const char *prompt;
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if (num < 0)
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return -1;
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if (key) {
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l = strlen(key);
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if (l > (size_t)num)
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l = (size_t)num;
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memcpy(buf, key, l);
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return (int)l;
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}
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prompt = EVP_get_pw_prompt();
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if (prompt == NULL)
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prompt = "Enter PEM pass phrase:";
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for (;;) {
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i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w);
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if (i != 0) {
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PEMerror(PEM_R_PROBLEMS_GETTING_PASSWORD);
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memset(buf, 0, num);
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return (-1);
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}
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l = strlen(buf);
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if (l < MIN_LENGTH) {
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fprintf(stderr, "phrase is too short, "
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"needs to be at least %zu chars\n",
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(size_t)MIN_LENGTH);
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} else
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break;
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}
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return (int)l;
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}
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LCRYPTO_ALIAS(PEM_def_callback);
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void
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PEM_proc_type(char *buf, int type)
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{
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const char *str;
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if (type == PEM_TYPE_ENCRYPTED)
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str = "ENCRYPTED";
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else if (type == PEM_TYPE_MIC_CLEAR)
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str = "MIC-CLEAR";
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else if (type == PEM_TYPE_MIC_ONLY)
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str = "MIC-ONLY";
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else
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str = "BAD-TYPE";
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strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
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strlcat(buf, str, PEM_BUFSIZE);
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strlcat(buf, "\n", PEM_BUFSIZE);
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}
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LCRYPTO_ALIAS(PEM_proc_type);
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void
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PEM_dek_info(char *buf, const char *type, int len, char *str)
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{
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static const unsigned char map[17] = "0123456789ABCDEF";
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long i;
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int j;
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strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
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strlcat(buf, type, PEM_BUFSIZE);
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strlcat(buf, ",", PEM_BUFSIZE);
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j = strlen(buf);
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if (j + (len * 2) + 1 > PEM_BUFSIZE)
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return;
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for (i = 0; i < len; i++) {
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buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
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buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
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}
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buf[j + i * 2] = '\n';
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buf[j + i * 2 + 1] = '\0';
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}
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LCRYPTO_ALIAS(PEM_dek_info);
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void *
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PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
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pem_password_cb *cb, void *u)
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{
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BIO *b;
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void *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_ASN1_read_bio(d2i, name, b, x, cb, u);
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BIO_free(b);
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return (ret);
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}
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LCRYPTO_ALIAS(PEM_ASN1_read);
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static int
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check_pem(const char *nm, const char *name)
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{
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/* Normal matching nm and name */
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if (!strcmp(nm, name))
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return 1;
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/* Make PEM_STRING_EVP_PKEY match any private key */
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if (!strcmp(name, PEM_STRING_EVP_PKEY)) {
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int slen;
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const EVP_PKEY_ASN1_METHOD *ameth;
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if (!strcmp(nm, PEM_STRING_PKCS8))
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return 1;
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if (!strcmp(nm, PEM_STRING_PKCS8INF))
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return 1;
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slen = pem_check_suffix(nm, "PRIVATE KEY");
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if (slen > 0) {
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/* NB: ENGINE implementations wont contain
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* a deprecated old private key decode function
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* so don't look for them.
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*/
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ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
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if (ameth && ameth->old_priv_decode)
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return 1;
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}
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return 0;
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}
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if (!strcmp(name, PEM_STRING_PARAMETERS)) {
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int slen;
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const EVP_PKEY_ASN1_METHOD *ameth;
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slen = pem_check_suffix(nm, "PARAMETERS");
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if (slen > 0) {
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ENGINE *e;
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ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
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if (ameth) {
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int r;
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if (ameth->param_decode)
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r = 1;
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else
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r = 0;
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(e);
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#endif
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return r;
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}
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}
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return 0;
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}
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/* Permit older strings */
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if (!strcmp(nm, PEM_STRING_X509_OLD) &&
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!strcmp(name, PEM_STRING_X509))
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return 1;
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if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) &&
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!strcmp(name, PEM_STRING_X509_REQ))
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return 1;
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/* Allow normal certs to be read as trusted certs */
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if (!strcmp(nm, PEM_STRING_X509) &&
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!strcmp(name, PEM_STRING_X509_TRUSTED))
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return 1;
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if (!strcmp(nm, PEM_STRING_X509_OLD) &&
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!strcmp(name, PEM_STRING_X509_TRUSTED))
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return 1;
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/* Some CAs use PKCS#7 with CERTIFICATE headers */
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if (!strcmp(nm, PEM_STRING_X509) &&
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!strcmp(name, PEM_STRING_PKCS7))
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return 1;
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if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
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!strcmp(name, PEM_STRING_PKCS7))
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return 1;
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#ifndef OPENSSL_NO_CMS
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if (strcmp(nm, PEM_STRING_X509) == 0 &&
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strcmp(name, PEM_STRING_CMS) == 0)
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return 1;
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/* Allow CMS to be read from PKCS#7 headers */
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if (strcmp(nm, PEM_STRING_PKCS7) == 0 &&
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strcmp(name, PEM_STRING_CMS) == 0)
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return 1;
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#endif
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return 0;
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}
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int
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PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
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const char *name, BIO *bp, pem_password_cb *cb, void *u)
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{
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EVP_CIPHER_INFO cipher;
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char *nm = NULL, *header = NULL;
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unsigned char *data = NULL;
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long len;
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int ret = 0;
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for (;;) {
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if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
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if (ERR_GET_REASON(ERR_peek_error()) ==
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PEM_R_NO_START_LINE)
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ERR_asprintf_error_data("Expecting: %s", name);
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return 0;
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}
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if (check_pem(nm, name))
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break;
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free(nm);
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free(header);
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free(data);
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}
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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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||||
|
||||
*pdata = data;
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*plen = len;
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if (pnm)
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*pnm = nm;
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ret = 1;
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||||
|
||||
err:
|
||||
if (!ret || !pnm)
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||||
free(nm);
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||||
free(header);
|
||||
if (!ret)
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free(data);
|
||||
return ret;
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_bytes_read_bio);
|
||||
|
||||
int
|
||||
PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, void *x,
|
||||
const EVP_CIPHER *enc, unsigned char *kstr, int klen,
|
||||
pem_password_cb *callback, void *u)
|
||||
{
|
||||
BIO *b;
|
||||
int ret;
|
||||
|
||||
if ((b = BIO_new(BIO_s_file())) == NULL) {
|
||||
PEMerror(ERR_R_BUF_LIB);
|
||||
return (0);
|
||||
}
|
||||
BIO_set_fp(b, fp, BIO_NOCLOSE);
|
||||
ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
|
||||
BIO_free(b);
|
||||
return (ret);
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_ASN1_write);
|
||||
|
||||
int
|
||||
PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, void *x,
|
||||
const EVP_CIPHER *enc, unsigned char *kstr, int klen,
|
||||
pem_password_cb *callback, void *u)
|
||||
{
|
||||
EVP_CIPHER_CTX ctx;
|
||||
int dsize = 0, i, j, ret = 0;
|
||||
unsigned char *p, *data = NULL;
|
||||
const char *objstr = NULL;
|
||||
char buf[PEM_BUFSIZE];
|
||||
unsigned char key[EVP_MAX_KEY_LENGTH];
|
||||
unsigned char iv[EVP_MAX_IV_LENGTH];
|
||||
|
||||
if (enc != NULL) {
|
||||
objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
|
||||
if (objstr == NULL) {
|
||||
PEMerror(PEM_R_UNSUPPORTED_CIPHER);
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
if ((dsize = i2d(x, NULL)) < 0) {
|
||||
PEMerror(ERR_R_ASN1_LIB);
|
||||
dsize = 0;
|
||||
goto err;
|
||||
}
|
||||
/* dzise + 8 bytes are needed */
|
||||
/* actually it needs the cipher block size extra... */
|
||||
data = malloc(dsize + 20);
|
||||
if (data == NULL) {
|
||||
PEMerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
p = data;
|
||||
i = i2d(x, &p);
|
||||
|
||||
if (enc != NULL) {
|
||||
if (kstr == NULL) {
|
||||
if (callback == NULL)
|
||||
klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
|
||||
else
|
||||
klen = (*callback)(buf, PEM_BUFSIZE, 1, u);
|
||||
if (klen <= 0) {
|
||||
PEMerror(PEM_R_READ_KEY);
|
||||
goto err;
|
||||
}
|
||||
kstr = (unsigned char *)buf;
|
||||
}
|
||||
if ((size_t)enc->iv_len > sizeof(iv)) {
|
||||
PEMerror(EVP_R_IV_TOO_LARGE);
|
||||
goto err;
|
||||
}
|
||||
arc4random_buf(iv, enc->iv_len); /* Generate a salt */
|
||||
/* The 'iv' is used as the iv and as a salt. It is
|
||||
* NOT taken from the BytesToKey function */
|
||||
if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1,
|
||||
key, NULL))
|
||||
goto err;
|
||||
|
||||
if (kstr == (unsigned char *)buf)
|
||||
explicit_bzero(buf, PEM_BUFSIZE);
|
||||
|
||||
if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > sizeof buf) {
|
||||
PEMerror(ASN1_R_BUFFER_TOO_SMALL);
|
||||
goto err;
|
||||
}
|
||||
|
||||
buf[0] = '\0';
|
||||
PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
|
||||
PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
|
||||
/* k=strlen(buf); */
|
||||
|
||||
EVP_CIPHER_CTX_init(&ctx);
|
||||
ret = 1;
|
||||
if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) ||
|
||||
!EVP_EncryptUpdate(&ctx, data, &j, data, i) ||
|
||||
!EVP_EncryptFinal_ex(&ctx, &(data[j]), &i))
|
||||
ret = 0;
|
||||
EVP_CIPHER_CTX_cleanup(&ctx);
|
||||
if (ret == 0)
|
||||
goto err;
|
||||
i += j;
|
||||
} else {
|
||||
ret = 1;
|
||||
buf[0] = '\0';
|
||||
}
|
||||
i = PEM_write_bio(bp, name, buf, data, i);
|
||||
if (i <= 0)
|
||||
ret = 0;
|
||||
err:
|
||||
explicit_bzero(key, sizeof(key));
|
||||
explicit_bzero(iv, sizeof(iv));
|
||||
explicit_bzero((char *)&ctx, sizeof(ctx));
|
||||
explicit_bzero(buf, PEM_BUFSIZE);
|
||||
freezero(data, (unsigned int)dsize);
|
||||
return (ret);
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_ASN1_write_bio);
|
||||
|
||||
int
|
||||
PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
|
||||
pem_password_cb *callback, void *u)
|
||||
{
|
||||
int i, j, o, klen;
|
||||
long len;
|
||||
EVP_CIPHER_CTX ctx;
|
||||
unsigned char key[EVP_MAX_KEY_LENGTH];
|
||||
char buf[PEM_BUFSIZE];
|
||||
|
||||
len = *plen;
|
||||
|
||||
if (cipher->cipher == NULL)
|
||||
return (1);
|
||||
if (callback == NULL)
|
||||
klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
|
||||
else
|
||||
klen = callback(buf, PEM_BUFSIZE, 0, u);
|
||||
if (klen <= 0) {
|
||||
PEMerror(PEM_R_BAD_PASSWORD_READ);
|
||||
return (0);
|
||||
}
|
||||
if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
|
||||
(unsigned char *)buf, klen, 1, key, NULL))
|
||||
return 0;
|
||||
|
||||
j = (int)len;
|
||||
EVP_CIPHER_CTX_init(&ctx);
|
||||
o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key,
|
||||
&(cipher->iv[0]));
|
||||
if (o)
|
||||
o = EVP_DecryptUpdate(&ctx, data, &i, data, j);
|
||||
if (o)
|
||||
o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j);
|
||||
EVP_CIPHER_CTX_cleanup(&ctx);
|
||||
explicit_bzero((char *)buf, sizeof(buf));
|
||||
explicit_bzero((char *)key, sizeof(key));
|
||||
if (!o) {
|
||||
PEMerror(PEM_R_BAD_DECRYPT);
|
||||
return (0);
|
||||
}
|
||||
*plen = j + i;
|
||||
return (1);
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_do_header);
|
||||
|
||||
int
|
||||
PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
|
||||
{
|
||||
const EVP_CIPHER *enc = NULL;
|
||||
char *p, c;
|
||||
char **header_pp = &header;
|
||||
|
||||
cipher->cipher = NULL;
|
||||
if ((header == NULL) || (*header == '\0') || (*header == '\n'))
|
||||
return (1);
|
||||
if (strncmp(header, "Proc-Type: ", 11) != 0) {
|
||||
PEMerror(PEM_R_NOT_PROC_TYPE);
|
||||
return (0);
|
||||
}
|
||||
header += 11;
|
||||
if (*header != '4')
|
||||
return (0);
|
||||
header++;
|
||||
if (*header != ',')
|
||||
return (0);
|
||||
header++;
|
||||
if (strncmp(header, "ENCRYPTED", 9) != 0) {
|
||||
PEMerror(PEM_R_NOT_ENCRYPTED);
|
||||
return (0);
|
||||
}
|
||||
for (; (*header != '\n') && (*header != '\0'); header++)
|
||||
;
|
||||
if (*header == '\0') {
|
||||
PEMerror(PEM_R_SHORT_HEADER);
|
||||
return (0);
|
||||
}
|
||||
header++;
|
||||
if (strncmp(header, "DEK-Info: ", 10) != 0) {
|
||||
PEMerror(PEM_R_NOT_DEK_INFO);
|
||||
return (0);
|
||||
}
|
||||
header += 10;
|
||||
|
||||
p = header;
|
||||
for (;;) {
|
||||
c= *header;
|
||||
if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
|
||||
((c >= '0') && (c <= '9'))))
|
||||
break;
|
||||
header++;
|
||||
}
|
||||
*header = '\0';
|
||||
cipher->cipher = enc = EVP_get_cipherbyname(p);
|
||||
*header = c;
|
||||
header++;
|
||||
|
||||
if (enc == NULL) {
|
||||
PEMerror(PEM_R_UNSUPPORTED_ENCRYPTION);
|
||||
return (0);
|
||||
}
|
||||
if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len))
|
||||
return (0);
|
||||
|
||||
return (1);
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_get_EVP_CIPHER_INFO);
|
||||
|
||||
static int
|
||||
load_iv(char **fromp, unsigned char *to, int num)
|
||||
{
|
||||
int v, i;
|
||||
char *from;
|
||||
|
||||
from= *fromp;
|
||||
for (i = 0; i < num; i++)
|
||||
to[i] = 0;
|
||||
num *= 2;
|
||||
for (i = 0; i < num; i++) {
|
||||
if ((*from >= '0') && (*from <= '9'))
|
||||
v = *from - '0';
|
||||
else if ((*from >= 'A') && (*from <= 'F'))
|
||||
v = *from - 'A' + 10;
|
||||
else if ((*from >= 'a') && (*from <= 'f'))
|
||||
v = *from - 'a' + 10;
|
||||
else {
|
||||
PEMerror(PEM_R_BAD_IV_CHARS);
|
||||
return (0);
|
||||
}
|
||||
from++;
|
||||
to[i / 2] |= v << (long)((!(i & 1)) * 4);
|
||||
}
|
||||
|
||||
*fromp = from;
|
||||
return (1);
|
||||
}
|
||||
|
||||
int
|
||||
PEM_write(FILE *fp, const char *name, const char *header,
|
||||
const unsigned char *data, long len)
|
||||
{
|
||||
BIO *b;
|
||||
int ret;
|
||||
|
||||
if ((b = BIO_new(BIO_s_file())) == NULL) {
|
||||
PEMerror(ERR_R_BUF_LIB);
|
||||
return (0);
|
||||
}
|
||||
BIO_set_fp(b, fp, BIO_NOCLOSE);
|
||||
ret = PEM_write_bio(b, name, header, data, len);
|
||||
BIO_free(b);
|
||||
return (ret);
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_write);
|
||||
|
||||
int
|
||||
PEM_write_bio(BIO *bp, const char *name, const char *header,
|
||||
const unsigned char *data, long len)
|
||||
{
|
||||
int nlen, n, i, j, outl;
|
||||
unsigned char *buf = NULL;
|
||||
EVP_ENCODE_CTX ctx;
|
||||
int reason = ERR_R_BUF_LIB;
|
||||
|
||||
EVP_EncodeInit(&ctx);
|
||||
nlen = strlen(name);
|
||||
|
||||
if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
|
||||
(BIO_write(bp, name, nlen) != nlen) ||
|
||||
(BIO_write(bp, "-----\n", 6) != 6))
|
||||
goto err;
|
||||
|
||||
if (header != NULL && (i = strlen(header)) > 0) {
|
||||
if ((BIO_write(bp, header, i) != i) ||
|
||||
(BIO_write(bp, "\n", 1) != 1))
|
||||
goto err;
|
||||
}
|
||||
|
||||
buf = reallocarray(NULL, PEM_BUFSIZE, 8);
|
||||
if (buf == NULL) {
|
||||
reason = ERR_R_MALLOC_FAILURE;
|
||||
goto err;
|
||||
}
|
||||
|
||||
i = j = 0;
|
||||
while (len > 0) {
|
||||
n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
|
||||
if (!EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n))
|
||||
goto err;
|
||||
if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
|
||||
goto err;
|
||||
i += outl;
|
||||
len -= n;
|
||||
j += n;
|
||||
}
|
||||
EVP_EncodeFinal(&ctx, buf, &outl);
|
||||
if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
|
||||
goto err;
|
||||
freezero(buf, PEM_BUFSIZE * 8);
|
||||
buf = NULL;
|
||||
if ((BIO_write(bp, "-----END ", 9) != 9) ||
|
||||
(BIO_write(bp, name, nlen) != nlen) ||
|
||||
(BIO_write(bp, "-----\n", 6) != 6))
|
||||
goto err;
|
||||
return (i + outl);
|
||||
|
||||
err:
|
||||
freezero(buf, PEM_BUFSIZE * 8);
|
||||
PEMerror(reason);
|
||||
return (0);
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_write_bio);
|
||||
|
||||
int
|
||||
PEM_read(FILE *fp, char **name, char **header, unsigned char **data, long *len)
|
||||
{
|
||||
BIO *b;
|
||||
int ret;
|
||||
|
||||
if ((b = BIO_new(BIO_s_file())) == NULL) {
|
||||
PEMerror(ERR_R_BUF_LIB);
|
||||
return (0);
|
||||
}
|
||||
BIO_set_fp(b, fp, BIO_NOCLOSE);
|
||||
ret = PEM_read_bio(b, name, header, data, len);
|
||||
BIO_free(b);
|
||||
return (ret);
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_read);
|
||||
|
||||
int
|
||||
PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
|
||||
long *len)
|
||||
{
|
||||
EVP_ENCODE_CTX ctx;
|
||||
int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
|
||||
char buf[256];
|
||||
BUF_MEM *nameB;
|
||||
BUF_MEM *headerB;
|
||||
BUF_MEM *dataB, *tmpB;
|
||||
|
||||
nameB = BUF_MEM_new();
|
||||
headerB = BUF_MEM_new();
|
||||
dataB = BUF_MEM_new();
|
||||
if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
|
||||
BUF_MEM_free(nameB);
|
||||
BUF_MEM_free(headerB);
|
||||
BUF_MEM_free(dataB);
|
||||
PEMerror(ERR_R_MALLOC_FAILURE);
|
||||
return (0);
|
||||
}
|
||||
|
||||
buf[254] = '\0';
|
||||
for (;;) {
|
||||
i = BIO_gets(bp, buf, 254);
|
||||
|
||||
if (i <= 0) {
|
||||
PEMerror(PEM_R_NO_START_LINE);
|
||||
goto err;
|
||||
}
|
||||
|
||||
while ((i >= 0) && (buf[i] <= ' '))
|
||||
i--;
|
||||
buf[++i] = '\n';
|
||||
buf[++i] = '\0';
|
||||
|
||||
if (strncmp(buf, "-----BEGIN ", 11) == 0) {
|
||||
i = strlen(&(buf[11]));
|
||||
|
||||
if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
|
||||
continue;
|
||||
if (!BUF_MEM_grow(nameB, i + 9)) {
|
||||
PEMerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
memcpy(nameB->data, &(buf[11]), i - 6);
|
||||
nameB->data[i - 6] = '\0';
|
||||
break;
|
||||
}
|
||||
}
|
||||
hl = 0;
|
||||
if (!BUF_MEM_grow(headerB, 256)) {
|
||||
PEMerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
headerB->data[0] = '\0';
|
||||
for (;;) {
|
||||
i = BIO_gets(bp, buf, 254);
|
||||
if (i <= 0)
|
||||
break;
|
||||
|
||||
while ((i >= 0) && (buf[i] <= ' '))
|
||||
i--;
|
||||
buf[++i] = '\n';
|
||||
buf[++i] = '\0';
|
||||
|
||||
if (buf[0] == '\n')
|
||||
break;
|
||||
if (!BUF_MEM_grow(headerB, hl + i + 9)) {
|
||||
PEMerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
if (strncmp(buf, "-----END ", 9) == 0) {
|
||||
nohead = 1;
|
||||
break;
|
||||
}
|
||||
memcpy(&(headerB->data[hl]), buf, i);
|
||||
headerB->data[hl + i] = '\0';
|
||||
hl += i;
|
||||
}
|
||||
|
||||
bl = 0;
|
||||
if (!BUF_MEM_grow(dataB, 1024)) {
|
||||
PEMerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
dataB->data[0] = '\0';
|
||||
if (!nohead) {
|
||||
for (;;) {
|
||||
i = BIO_gets(bp, buf, 254);
|
||||
if (i <= 0)
|
||||
break;
|
||||
|
||||
while ((i >= 0) && (buf[i] <= ' '))
|
||||
i--;
|
||||
buf[++i] = '\n';
|
||||
buf[++i] = '\0';
|
||||
|
||||
if (i != 65)
|
||||
end = 1;
|
||||
if (strncmp(buf, "-----END ", 9) == 0)
|
||||
break;
|
||||
if (i > 65)
|
||||
break;
|
||||
if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
|
||||
PEMerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
memcpy(&(dataB->data[bl]), buf, i);
|
||||
dataB->data[bl + i] = '\0';
|
||||
bl += i;
|
||||
if (end) {
|
||||
buf[0] = '\0';
|
||||
i = BIO_gets(bp, buf, 254);
|
||||
if (i <= 0)
|
||||
break;
|
||||
|
||||
while ((i >= 0) && (buf[i] <= ' '))
|
||||
i--;
|
||||
buf[++i] = '\n';
|
||||
buf[++i] = '\0';
|
||||
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
tmpB = headerB;
|
||||
headerB = dataB;
|
||||
dataB = tmpB;
|
||||
bl = hl;
|
||||
}
|
||||
i = strlen(nameB->data);
|
||||
if ((strncmp(buf, "-----END ", 9) != 0) ||
|
||||
(strncmp(nameB->data, &(buf[9]), i) != 0) ||
|
||||
(strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
|
||||
PEMerror(PEM_R_BAD_END_LINE);
|
||||
goto err;
|
||||
}
|
||||
|
||||
EVP_DecodeInit(&ctx);
|
||||
i = EVP_DecodeUpdate(&ctx,
|
||||
(unsigned char *)dataB->data, &bl,
|
||||
(unsigned char *)dataB->data, bl);
|
||||
if (i < 0) {
|
||||
PEMerror(PEM_R_BAD_BASE64_DECODE);
|
||||
goto err;
|
||||
}
|
||||
i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
|
||||
if (i < 0) {
|
||||
PEMerror(PEM_R_BAD_BASE64_DECODE);
|
||||
goto err;
|
||||
}
|
||||
bl += k;
|
||||
|
||||
if (bl == 0)
|
||||
goto err;
|
||||
*name = nameB->data;
|
||||
*header = headerB->data;
|
||||
*data = (unsigned char *)dataB->data;
|
||||
*len = bl;
|
||||
free(nameB);
|
||||
free(headerB);
|
||||
free(dataB);
|
||||
return (1);
|
||||
|
||||
err:
|
||||
BUF_MEM_free(nameB);
|
||||
BUF_MEM_free(headerB);
|
||||
BUF_MEM_free(dataB);
|
||||
return (0);
|
||||
}
|
||||
LCRYPTO_ALIAS(PEM_read_bio);
|
||||
|
||||
/* Check pem string and return prefix length.
|
||||
* If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY"
|
||||
* the return value is 3 for the string "RSA".
|
||||
*/
|
||||
|
||||
int
|
||||
pem_check_suffix(const char *pem_str, const char *suffix)
|
||||
{
|
||||
int pem_len = strlen(pem_str);
|
||||
int suffix_len = strlen(suffix);
|
||||
const char *p;
|
||||
|
||||
if (suffix_len + 1 >= pem_len)
|
||||
return 0;
|
||||
p = pem_str + pem_len - suffix_len;
|
||||
if (strcmp(p, suffix))
|
||||
return 0;
|
||||
p--;
|
||||
if (*p != ' ')
|
||||
return 0;
|
||||
return p - pem_str;
|
||||
}
|
||||
Reference in New Issue
Block a user