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-rw-r--r--Cryptlib/OpenSSL/crypto/pem/pem_lib.c434
1 files changed, 213 insertions, 221 deletions
diff --git a/Cryptlib/OpenSSL/crypto/pem/pem_lib.c b/Cryptlib/OpenSSL/crypto/pem/pem_lib.c
index e25cc685..2792593c 100644
--- a/Cryptlib/OpenSSL/crypto/pem/pem_lib.c
+++ b/Cryptlib/OpenSSL/crypto/pem/pem_lib.c
@@ -1,64 +1,16 @@
-/* crypto/pem/pem_lib.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <ctype.h>
-#include "cryptlib.h"
+#include <string.h>
+#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
@@ -66,15 +18,9 @@
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
-#include "asn1_locl.h"
-#ifndef OPENSSL_NO_DES
-# include <openssl/des.h>
-#endif
-#ifndef OPENSSL_NO_ENGINE
-# include <openssl/engine.h>
-#endif
-
-const char PEM_version[] = "PEM" OPENSSL_VERSION_PTEXT;
+#include "internal/asn1_int.h"
+#include <openssl/des.h>
+#include <openssl/engine.h>
#define MIN_LENGTH 4
@@ -84,42 +30,50 @@ int pem_check_suffix(const char *pem_str, const char *suffix);
int PEM_def_callback(char *buf, int num, int w, void *key)
{
-#if defined(OPENSSL_NO_FP_API) || defined(OPENSSL_NO_UI)
- /*
- * We should not ever call the default callback routine from windows.
- */
- PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return (-1);
+#if defined(OPENSSL_NO_STDIO) || defined(OPENSSL_NO_UI)
+ int i;
#else
int i, j;
const char *prompt;
+#endif
+
if (key) {
i = strlen(key);
i = (i > num) ? num : i;
memcpy(buf, key, i);
- return (i);
+ return i;
}
+#if defined(OPENSSL_NO_STDIO) || defined(OPENSSL_NO_UI)
+ PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return -1;
+#else
prompt = EVP_get_pw_prompt();
if (prompt == NULL)
prompt = "Enter PEM pass phrase:";
for (;;) {
- i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w);
+ /*
+ * We assume that w == 0 means decryption,
+ * while w == 1 means encryption
+ */
+ int min_len = w ? MIN_LENGTH : 0;
+
+ i = EVP_read_pw_string_min(buf, min_len, num, prompt, w);
if (i != 0) {
PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
memset(buf, 0, (unsigned int)num);
- return (-1);
+ return -1;
}
j = strlen(buf);
- if (j < MIN_LENGTH) {
+ if (min_len && j < min_len) {
fprintf(stderr,
"phrase is too short, needs to be at least %d chars\n",
- MIN_LENGTH);
+ min_len);
} else
break;
}
- return (j);
+ return j;
#endif
}
@@ -136,9 +90,9 @@ void PEM_proc_type(char *buf, int type)
else
str = "BAD-TYPE";
- BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
- BUF_strlcat(buf, str, PEM_BUFSIZE);
- BUF_strlcat(buf, "\n", PEM_BUFSIZE);
+ OPENSSL_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
+ OPENSSL_strlcat(buf, str, PEM_BUFSIZE);
+ OPENSSL_strlcat(buf, "\n", PEM_BUFSIZE);
}
void PEM_dek_info(char *buf, const char *type, int len, char *str)
@@ -147,9 +101,9 @@ void PEM_dek_info(char *buf, const char *type, int len, char *str)
long i;
int j;
- BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
- BUF_strlcat(buf, type, PEM_BUFSIZE);
- BUF_strlcat(buf, ",", PEM_BUFSIZE);
+ OPENSSL_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
+ OPENSSL_strlcat(buf, type, PEM_BUFSIZE);
+ OPENSSL_strlcat(buf, ",", PEM_BUFSIZE);
j = strlen(buf);
if (j + (len * 2) + 1 > PEM_BUFSIZE)
return;
@@ -161,7 +115,7 @@ void PEM_dek_info(char *buf, const char *type, int len, char *str)
buf[j + i * 2 + 1] = '\0';
}
-#ifndef OPENSSL_NO_FP_API
+#ifndef OPENSSL_NO_STDIO
void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
pem_password_cb *cb, void *u)
{
@@ -182,22 +136,22 @@ void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
static int check_pem(const char *nm, const char *name)
{
/* Normal matching nm and name */
- if (!strcmp(nm, name))
+ if (strcmp(nm, name) == 0)
return 1;
/* Make PEM_STRING_EVP_PKEY match any private key */
- if (!strcmp(name, PEM_STRING_EVP_PKEY)) {
+ if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) {
int slen;
const EVP_PKEY_ASN1_METHOD *ameth;
- if (!strcmp(nm, PEM_STRING_PKCS8))
+ if (strcmp(nm, PEM_STRING_PKCS8) == 0)
return 1;
- if (!strcmp(nm, PEM_STRING_PKCS8INF))
+ if (strcmp(nm, PEM_STRING_PKCS8INF) == 0)
return 1;
slen = pem_check_suffix(nm, "PRIVATE KEY");
if (slen > 0) {
/*
- * NB: ENGINE implementations wont contain a deprecated old
+ * NB: ENGINE implementations won't contain a deprecated old
* private key decode function so don't look for them.
*/
ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
@@ -207,7 +161,7 @@ static int check_pem(const char *nm, const char *name)
return 0;
}
- if (!strcmp(name, PEM_STRING_PARAMETERS)) {
+ if (strcmp(name, PEM_STRING_PARAMETERS) == 0) {
int slen;
const EVP_PKEY_ASN1_METHOD *ameth;
slen = pem_check_suffix(nm, "PARAMETERS");
@@ -221,8 +175,7 @@ static int check_pem(const char *nm, const char *name)
else
r = 0;
#ifndef OPENSSL_NO_ENGINE
- if (e)
- ENGINE_finish(e);
+ ENGINE_finish(e);
#endif
return r;
}
@@ -230,41 +183,45 @@ static int check_pem(const char *nm, const char *name)
return 0;
}
/* If reading DH parameters handle X9.42 DH format too */
- if (!strcmp(nm, PEM_STRING_DHXPARAMS) &&
- !strcmp(name, PEM_STRING_DHPARAMS))
+ if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0
+ && strcmp(name, PEM_STRING_DHPARAMS) == 0)
return 1;
/* Permit older strings */
- if (!strcmp(nm, PEM_STRING_X509_OLD) && !strcmp(name, PEM_STRING_X509))
+ if (strcmp(nm, PEM_STRING_X509_OLD) == 0
+ && strcmp(name, PEM_STRING_X509) == 0)
return 1;
- if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) &&
- !strcmp(name, PEM_STRING_X509_REQ))
+ if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0
+ && strcmp(name, PEM_STRING_X509_REQ) == 0)
return 1;
/* Allow normal certs to be read as trusted certs */
- if (!strcmp(nm, PEM_STRING_X509) &&
- !strcmp(name, PEM_STRING_X509_TRUSTED))
+ if (strcmp(nm, PEM_STRING_X509) == 0
+ && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
return 1;
- if (!strcmp(nm, PEM_STRING_X509_OLD) &&
- !strcmp(name, PEM_STRING_X509_TRUSTED))
+ if (strcmp(nm, PEM_STRING_X509_OLD) == 0
+ && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
return 1;
/* Some CAs use PKCS#7 with CERTIFICATE headers */
- if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_PKCS7))
+ if (strcmp(nm, PEM_STRING_X509) == 0
+ && strcmp(name, PEM_STRING_PKCS7) == 0)
return 1;
- if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
- !strcmp(name, PEM_STRING_PKCS7))
+ if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0
+ && strcmp(name, PEM_STRING_PKCS7) == 0)
return 1;
#ifndef OPENSSL_NO_CMS
- if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_CMS))
+ if (strcmp(nm, PEM_STRING_X509) == 0
+ && strcmp(name, PEM_STRING_CMS) == 0)
return 1;
/* Allow CMS to be read from PKCS#7 headers */
- if (!strcmp(nm, PEM_STRING_PKCS7) && !strcmp(name, PEM_STRING_CMS))
+ if (strcmp(nm, PEM_STRING_PKCS7) == 0
+ && strcmp(name, PEM_STRING_CMS) == 0)
return 1;
#endif
@@ -315,7 +272,7 @@ int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
return ret;
}
-#ifndef OPENSSL_NO_FP_API
+#ifndef OPENSSL_NO_STDIO
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)
@@ -338,8 +295,8 @@ 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;
+ EVP_CIPHER_CTX *ctx = NULL;
+ int dsize = 0, i = 0, j = 0, ret = 0;
unsigned char *p, *data = NULL;
const char *objstr = NULL;
char buf[PEM_BUFSIZE];
@@ -361,7 +318,7 @@ int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
}
/* dzise + 8 bytes are needed */
/* actually it needs the cipher block size extra... */
- data = (unsigned char *)OPENSSL_malloc((unsigned int)dsize + 20);
+ data = OPENSSL_malloc((unsigned int)dsize + 20);
if (data == NULL) {
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
goto err;
@@ -386,8 +343,8 @@ int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
kstr = (unsigned char *)buf;
}
RAND_add(data, i, 0); /* put in the RSA key. */
- OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
- if (RAND_pseudo_bytes(iv, enc->iv_len) < 0) /* Generate a salt */
+ OPENSSL_assert(EVP_CIPHER_iv_length(enc) <= (int)sizeof(iv));
+ if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */
goto err;
/*
* The 'iv' is used as the iv and as a salt. It is NOT taken from
@@ -399,21 +356,20 @@ int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
if (kstr == (unsigned char *)buf)
OPENSSL_cleanse(buf, PEM_BUFSIZE);
- OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <=
- sizeof buf);
+ OPENSSL_assert(strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13
+ <= sizeof buf);
buf[0] = '\0';
PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
- PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
+ PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (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))
+ if ((ctx = EVP_CIPHER_CTX_new()) == NULL
+ || !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;
@@ -427,127 +383,162 @@ int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
err:
OPENSSL_cleanse(key, sizeof(key));
OPENSSL_cleanse(iv, sizeof(iv));
- OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
+ EVP_CIPHER_CTX_free(ctx);
OPENSSL_cleanse(buf, PEM_BUFSIZE);
- if (data != NULL) {
- OPENSSL_cleanse(data, (unsigned int)dsize);
- OPENSSL_free(data);
- }
+ OPENSSL_clear_free(data, (unsigned int)dsize);
return (ret);
}
int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
pem_password_cb *callback, void *u)
{
- int i = 0, j, o, klen;
- long len;
- EVP_CIPHER_CTX ctx;
+ int ok;
+ int keylen;
+ long len = *plen;
+ int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */
+ EVP_CIPHER_CTX *ctx;
unsigned char key[EVP_MAX_KEY_LENGTH];
char buf[PEM_BUFSIZE];
- len = *plen;
+#if LONG_MAX > INT_MAX
+ /* Check that we did not truncate the length */
+ if (len > INT_MAX) {
+ PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG);
+ return 0;
+ }
+#endif
if (cipher->cipher == NULL)
- return (1);
+ return 1;
if (callback == NULL)
- klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
+ keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
else
- klen = callback(buf, PEM_BUFSIZE, 0, u);
- if (klen <= 0) {
+ keylen = callback(buf, PEM_BUFSIZE, 0, u);
+ if (keylen <= 0) {
PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
- return (0);
+ return 0;
}
#ifdef CHARSET_EBCDIC
/* Convert the pass phrase from EBCDIC */
- ebcdic2ascii(buf, buf, klen);
+ ebcdic2ascii(buf, buf, keylen);
#endif
if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
- (unsigned char *)buf, klen, 1, key, NULL))
+ (unsigned char *)buf, keylen, 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);
+ ctx = EVP_CIPHER_CTX_new();
+ if (ctx == NULL)
+ return 0;
+
+ ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
+ if (ok)
+ ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen);
+ if (ok) {
+ /* Squirrel away the length of data decrypted so far. */
+ *plen = ilen;
+ ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen);
+ }
+ if (ok)
+ *plen += ilen;
+ else
+ PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
+
+ EVP_CIPHER_CTX_free(ctx);
OPENSSL_cleanse((char *)buf, sizeof(buf));
OPENSSL_cleanse((char *)key, sizeof(key));
- if (o)
- j += i;
- else {
- PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
- return (0);
- }
- *plen = j;
- return (1);
+ return ok;
}
+/*
+ * This implements a very limited PEM header parser that does not support the
+ * full grammar of rfc1421. In particular, folded headers are not supported,
+ * nor is additional whitespace.
+ *
+ * A robust implementation would make use of a library that turns the headers
+ * into a BIO from which one folded line is read at a time, and is then split
+ * into a header label and content. We would then parse the content of the
+ * headers we care about. This is overkill for just this limited use-case, but
+ * presumably we also parse rfc822-style headers for S/MIME, so a common
+ * abstraction might well be more generally useful.
+ */
int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
{
+ static const char ProcType[] = "Proc-Type:";
+ static const char ENCRYPTED[] = "ENCRYPTED";
+ static const char DEKInfo[] = "DEK-Info:";
const EVP_CIPHER *enc = NULL;
- char *p, c;
- char **header_pp = &header;
+ int ivlen;
+ char *dekinfostart, c;
cipher->cipher = NULL;
if ((header == NULL) || (*header == '\0') || (*header == '\n'))
- return (1);
- if (strncmp(header, "Proc-Type: ", 11) != 0) {
+ return 1;
+
+ if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
- return (0);
+ return 0;
}
- header += 11;
- if (*header != '4')
- return (0);
- header++;
- if (*header != ',')
- return (0);
- header++;
- if (strncmp(header, "ENCRYPTED", 9) != 0) {
+ header += sizeof(ProcType)-1;
+ header += strspn(header, " \t");
+
+ if (*header++ != '4' || *header++ != ',')
+ return 0;
+ header += strspn(header, " \t");
+
+ /* We expect "ENCRYPTED" followed by optional white-space + line break */
+ if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
+ strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
- return (0);
+ return 0;
}
- for (; (*header != '\n') && (*header != '\0'); header++) ;
- if (*header == '\0') {
+ header += sizeof(ENCRYPTED)-1;
+ header += strspn(header, " \t\r");
+ if (*header++ != '\n') {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
- return (0);
+ return 0;
}
- header++;
- if (strncmp(header, "DEK-Info: ", 10) != 0) {
+
+ /*-
+ * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
+ * We expect "DEK-Info: algo[,hex-parameters]"
+ */
+ if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
- return (0);
+ return 0;
}
- header += 10;
+ header += sizeof(DEKInfo)-1;
+ header += strspn(header, " \t");
- p = header;
- for (;;) {
- c = *header;
-#ifndef CHARSET_EBCDIC
- if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') ||
- ((c >= '0') && (c <= '9'))))
- break;
-#else
- if (!(isupper(c) || (c == '-') || isdigit(c)))
- break;
-#endif
- header++;
- }
+ /*
+ * DEK-INFO is a comma-separated combination of algorithm name and optional
+ * parameters.
+ */
+ dekinfostart = header;
+ header += strcspn(header, " \t,");
+ c = *header;
*header = '\0';
- cipher->cipher = enc = EVP_get_cipherbyname(p);
+ cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
*header = c;
- header++;
+ header += strspn(header, " \t");
if (enc == NULL) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
- return (0);
+ return 0;
+ }
+ ivlen = EVP_CIPHER_iv_length(enc);
+ if (ivlen > 0 && *header++ != ',') {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
+ return 0;
+ } else if (ivlen == 0 && *header == ',') {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
+ return 0;
}
- if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len))
- return (0);
- return (1);
+ if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
+ return 0;
+
+ return 1;
}
static int load_iv(char **fromp, unsigned char *to, int num)
@@ -560,13 +551,8 @@ static int load_iv(char **fromp, unsigned char *to, int num)
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 {
+ v = OPENSSL_hexchar2int(*from);
+ if (v < 0) {
PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
return (0);
}
@@ -578,7 +564,7 @@ static int load_iv(char **fromp, unsigned char *to, int num)
return (1);
}
-#ifndef OPENSSL_NO_FP_API
+#ifndef OPENSSL_NO_STDIO
int PEM_write(FILE *fp, const char *name, const char *header,
const unsigned char *data, long len)
{
@@ -601,10 +587,15 @@ int PEM_write_bio(BIO *bp, const char *name, const char *header,
{
int nlen, n, i, j, outl;
unsigned char *buf = NULL;
- EVP_ENCODE_CTX ctx;
+ EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
int reason = ERR_R_BUF_LIB;
- EVP_EncodeInit(&ctx);
+ if (ctx == NULL) {
+ reason = ERR_R_MALLOC_FAILURE;
+ goto err;
+ }
+
+ EVP_EncodeInit(ctx);
nlen = strlen(name);
if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
@@ -627,34 +618,32 @@ int PEM_write_bio(BIO *bp, const char *name, const char *header,
i = j = 0;
while (len > 0) {
n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
- EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n);
+ 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);
+ EVP_EncodeFinal(ctx, buf, &outl);
if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
goto err;
- OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
- OPENSSL_free(buf);
- buf = NULL;
if ((BIO_write(bp, "-----END ", 9) != 9) ||
(BIO_write(bp, name, nlen) != nlen) ||
(BIO_write(bp, "-----\n", 6) != 6))
goto err;
+ OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
+ EVP_ENCODE_CTX_free(ctx);
return (i + outl);
err:
- if (buf) {
- OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
- OPENSSL_free(buf);
- }
+ OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
+ EVP_ENCODE_CTX_free(ctx);
PEMerr(PEM_F_PEM_WRITE_BIO, reason);
return (0);
}
-#ifndef OPENSSL_NO_FP_API
+#ifndef OPENSSL_NO_STDIO
int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
long *len)
{
@@ -675,22 +664,23 @@ int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
long *len)
{
- EVP_ENCODE_CTX ctx;
+ EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
char buf[256];
BUF_MEM *nameB;
BUF_MEM *headerB;
BUF_MEM *dataB, *tmpB;
+ if (ctx == NULL) {
+ PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
+ return (0);
+ }
+
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);
- PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
- return (0);
+ goto err;
}
buf[254] = '\0';
@@ -810,15 +800,15 @@ int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
goto err;
}
- EVP_DecodeInit(&ctx);
- i = EVP_DecodeUpdate(&ctx,
+ EVP_DecodeInit(ctx);
+ i = EVP_DecodeUpdate(ctx,
(unsigned char *)dataB->data, &bl,
(unsigned char *)dataB->data, bl);
if (i < 0) {
PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
goto err;
}
- i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
+ i = EVP_DecodeFinal(ctx, (unsigned char *)&(dataB->data[bl]), &k);
if (i < 0) {
PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
goto err;
@@ -834,11 +824,13 @@ int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
OPENSSL_free(nameB);
OPENSSL_free(headerB);
OPENSSL_free(dataB);
+ EVP_ENCODE_CTX_free(ctx);
return (1);
err:
BUF_MEM_free(nameB);
BUF_MEM_free(headerB);
BUF_MEM_free(dataB);
+ EVP_ENCODE_CTX_free(ctx);
return (0);
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-09-02 07:01:43 +0000