-/* 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 1995-2023 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 Apache License 2.0 (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
*/
+/* We need to use some engine deprecated APIs */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
#include <stdio.h>
-#include <ctype.h>
-#include "cryptlib.h"
+#include "crypto/ctype.h"
+#include <string.h>
+#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
-#include "internal/asn1_int.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 "crypto/asn1.h"
+#include <openssl/des.h>
+#include <openssl/engine.h>
#define MIN_LENGTH 4
static int load_iv(char **fromp, unsigned char *to, int num);
static int check_pem(const char *nm, const char *name);
-int pem_check_suffix(const char *pem_str, const char *suffix);
+int ossl_pem_check_suffix(const char *pem_str, const char *suffix);
-int PEM_def_callback(char *buf, int num, int w, void *key)
+int PEM_def_callback(char *buf, int num, int rwflag, void *userdata)
{
-#ifdef OPENSSL_NO_STDIO
- /*
- * 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);
-#else
- int i, j;
+ int i, min_len;
const char *prompt;
- if (key) {
- i = strlen(key);
+
+ /* We assume that the user passes a default password as userdata */
+ if (userdata) {
+ i = strlen(userdata);
i = (i > num) ? num : i;
- memcpy(buf, key, i);
- return (i);
+ memcpy(buf, userdata, i);
+ return i;
}
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);
- if (i != 0) {
- PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
- memset(buf, 0, (unsigned int)num);
- return (-1);
- }
- j = strlen(buf);
- if (j < MIN_LENGTH) {
- fprintf(stderr,
- "phrase is too short, needs to be at least %d chars\n",
- MIN_LENGTH);
- } else
- break;
+ /*
+ * rwflag == 0 means decryption
+ * rwflag == 1 means encryption
+ *
+ * We assume that for encryption, we want a minimum length, while for
+ * decryption, we cannot know any minimum length, so we assume zero.
+ */
+ min_len = rwflag ? MIN_LENGTH : 0;
+
+ i = EVP_read_pw_string_min(buf, min_len, num, prompt, rwflag);
+ if (i != 0) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_PROBLEMS_GETTING_PASSWORD);
+ memset(buf, 0, (unsigned int)num);
+ return -1;
}
- return (j);
-#endif
+ return strlen(buf);
}
void PEM_proc_type(char *buf, int type)
{
const char *str;
+ char *p = buf + strlen(buf);
if (type == PEM_TYPE_ENCRYPTED)
str = "ENCRYPTED";
else
str = "BAD-TYPE";
- BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
- BUF_strlcat(buf, str, PEM_BUFSIZE);
- BUF_strlcat(buf, "\n", PEM_BUFSIZE);
+ BIO_snprintf(p, PEM_BUFSIZE - (size_t)(p - buf), "Proc-Type: 4,%s\n", str);
}
-void PEM_dek_info(char *buf, const char *type, int len, char *str)
+void PEM_dek_info(char *buf, const char *type, int len, const char *str)
{
- static const unsigned char map[17] = "0123456789ABCDEF";
long i;
- int j;
-
- BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
- BUF_strlcat(buf, type, PEM_BUFSIZE);
- BUF_strlcat(buf, ",", PEM_BUFSIZE);
- j = strlen(buf);
- if (j + (len * 2) + 1 > PEM_BUFSIZE)
- return;
- for (i = 0; i < len; i++) {
- buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
- buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
- }
- buf[j + i * 2] = '\n';
- buf[j + i * 2 + 1] = '\0';
+ char *p = buf + strlen(buf);
+ int j = PEM_BUFSIZE - (size_t)(p - buf), n;
+
+ n = BIO_snprintf(p, j, "DEK-Info: %s,", type);
+ if (n > 0) {
+ j -= n;
+ p += n;
+ for (i = 0; i < len; i++) {
+ n = BIO_snprintf(p, j, "%02X", 0xff & str[i]);
+ if (n <= 0)
+ return;
+ j -= n;
+ p += n;
+ }
+ if (j > 1)
+ strcpy(p, "\n");
+ }
}
#ifndef OPENSSL_NO_STDIO
void *ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
- PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
- return (0);
+ ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
+ return 0;
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
BIO_free(b);
- return (ret);
+ return ret;
}
#endif
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");
+ slen = ossl_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);
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");
+ slen = ossl_pem_check_suffix(nm, "PARAMETERS");
if (slen > 0) {
ENGINE *e;
ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
else
r = 0;
#ifndef OPENSSL_NO_ENGINE
- if (e)
- ENGINE_finish(e);
+ ENGINE_finish(e);
#endif
return r;
}
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
return 0;
}
-int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
- const char *name, BIO *bp, pem_password_cb *cb,
- void *u)
+#define PEM_FREE(p, flags, num) \
+ pem_free((p), (flags), (num), OPENSSL_FILE, OPENSSL_LINE)
+static void pem_free(void *p, unsigned int flags, size_t num,
+ const char *file, int line)
+{
+ if (flags & PEM_FLAG_SECURE)
+ CRYPTO_secure_clear_free(p, num, file, line);
+ else
+ CRYPTO_free(p, file, line);
+}
+
+#define PEM_MALLOC(num, flags) \
+ pem_malloc((num), (flags), OPENSSL_FILE, OPENSSL_LINE)
+static void *pem_malloc(int num, unsigned int flags,
+ const char *file, int line)
+{
+ return (flags & PEM_FLAG_SECURE) ? CRYPTO_secure_malloc(num, file, line)
+ : CRYPTO_malloc(num, file, line);
+
+}
+
+static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen,
+ char **pnm, const char *name, BIO *bp,
+ pem_password_cb *cb, void *u,
+ unsigned int flags)
{
EVP_CIPHER_INFO cipher;
char *nm = NULL, *header = NULL;
unsigned char *data = NULL;
- long len;
+ long len = 0;
int ret = 0;
- for (;;) {
- if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
+ do {
+ PEM_FREE(nm, flags, 0);
+ PEM_FREE(header, flags, 0);
+ PEM_FREE(data, flags, len);
+ if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) {
if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
ERR_add_error_data(2, "Expecting: ", name);
return 0;
}
- if (check_pem(nm, name))
- break;
- OPENSSL_free(nm);
- OPENSSL_free(header);
- OPENSSL_free(data);
- }
+ } while (!check_pem(nm, name));
if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
goto err;
if (!PEM_do_header(&cipher, data, &len, cb, u))
*pdata = data;
*plen = len;
- if (pnm)
+ if (pnm != NULL)
*pnm = nm;
ret = 1;
err:
- if (!ret || !pnm)
- OPENSSL_free(nm);
- OPENSSL_free(header);
+ if (!ret || pnm == NULL)
+ PEM_FREE(nm, flags, 0);
+ PEM_FREE(header, flags, 0);
if (!ret)
- OPENSSL_free(data);
+ PEM_FREE(data, flags, len);
return ret;
}
+int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
+ const char *name, BIO *bp, pem_password_cb *cb,
+ void *u) {
+ return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
+ PEM_FLAG_EAY_COMPATIBLE);
+}
+
+int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm,
+ const char *name, BIO *bp, pem_password_cb *cb,
+ void *u) {
+ return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
+ PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE);
+}
+
#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)
+ const void *x, const EVP_CIPHER *enc,
+ const unsigned char *kstr, int klen,
+ pem_password_cb *callback, void *u)
{
BIO *b;
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
- PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
- return (0);
+ ERR_raise(ERR_LIB_PEM, 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);
+ return ret;
}
#endif
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)
+ const void *x, const EVP_CIPHER *enc,
+ const 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];
unsigned char iv[EVP_MAX_IV_LENGTH];
if (enc != NULL) {
- objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
- if (objstr == NULL) {
- PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
+ objstr = EVP_CIPHER_get0_name(enc);
+ if (objstr == NULL || EVP_CIPHER_get_iv_length(enc) == 0
+ || EVP_CIPHER_get_iv_length(enc) > (int)sizeof(iv)
+ /*
+ * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n"
+ * fits into buf
+ */
+ || strlen(objstr) + 23 + 2 * EVP_CIPHER_get_iv_length(enc) + 13
+ > sizeof(buf)) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_CIPHER);
goto err;
}
}
- if ((dsize = i2d(x, NULL)) < 0) {
- PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
+ if ((dsize = i2d(x, NULL)) <= 0) {
+ ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB);
dsize = 0;
goto err;
}
- /* dzise + 8 bytes are needed */
+ /* dsize + 8 bytes are needed */
/* actually it needs the cipher block size extra... */
data = OPENSSL_malloc((unsigned int)dsize + 20);
- if (data == NULL) {
- PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
+ if (data == NULL)
goto err;
- }
p = data;
i = i2d(x, &p);
else
klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
if (klen <= 0) {
- PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
+ ERR_raise(ERR_LIB_PEM, PEM_R_READ_KEY);
goto err;
}
#ifdef CHARSET_EBCDIC
#endif
kstr = (unsigned char *)buf;
}
- RAND_add(data, i, 0); /* put in the RSA key. */
- OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
- if (RAND_bytes(iv, enc->iv_len) <= 0) /* Generate a salt */
+ /* Generate a salt */
+ if (RAND_bytes(iv, EVP_CIPHER_get_iv_length(enc)) <= 0)
goto err;
/*
* The 'iv' is used as the iv and as a salt. It is NOT taken from
if (kstr == (unsigned char *)buf)
OPENSSL_cleanse(buf, PEM_BUFSIZE);
- OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 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_get_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;
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);
- }
- return (ret);
+ 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) {
+ ERR_raise(ERR_LIB_PEM, 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) {
- PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
- return (0);
+ keylen = callback(buf, PEM_BUFSIZE, 0, u);
+ if (keylen < 0) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ);
+ 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
+ ERR_raise(ERR_LIB_PEM, 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.
+ */
+#define PROC_TYPE "Proc-Type:"
+#define ENCRYPTED "ENCRYPTED"
+#define DEK_INFO "DEK-Info:"
int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
{
const EVP_CIPHER *enc = NULL;
- char *p, c;
- char **header_pp = &header;
+ int ivlen;
+ char *dekinfostart, c;
cipher->cipher = NULL;
+ memset(cipher->iv, 0, sizeof(cipher->iv));
if ((header == NULL) || (*header == '\0') || (*header == '\n'))
- return (1);
- if (strncmp(header, "Proc-Type: ", 11) != 0) {
- PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, 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) {
- PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
- return (0);
- }
- for (; (*header != '\n') && (*header != '\0'); header++) ;
- if (*header == '\0') {
- PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
- return (0);
- }
- header++;
- if (strncmp(header, "DEK-Info: ", 10) != 0) {
- PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
- return (0);
- }
- header += 10;
-
- 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++;
+ return 1;
+
+ if (!CHECK_AND_SKIP_PREFIX(header, PROC_TYPE)) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_NOT_PROC_TYPE);
+ return 0;
+ }
+ 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 (!CHECK_AND_SKIP_PREFIX(header, ENCRYPTED) ||
+ strspn(header, " \t\r\n") == 0) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_NOT_ENCRYPTED);
+ return 0;
}
+ header += strspn(header, " \t\r");
+ if (*header++ != '\n') {
+ ERR_raise(ERR_LIB_PEM, PEM_R_SHORT_HEADER);
+ return 0;
+ }
+
+ /*-
+ * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
+ * We expect "DEK-Info: algo[,hex-parameters]"
+ */
+ if (!CHECK_AND_SKIP_PREFIX(header, DEK_INFO)) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_NOT_DEK_INFO);
+ return 0;
+ }
+ header += strspn(header, " \t");
+
+ /*
+ * 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);
+ ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_ENCRYPTION);
+ return 0;
+ }
+ ivlen = EVP_CIPHER_get_iv_length(enc);
+ if (ivlen > 0 && *header++ != ',') {
+ ERR_raise(ERR_LIB_PEM, PEM_R_MISSING_DEK_IV);
+ return 0;
+ } else if (ivlen == 0 && *header == ',') {
+ ERR_raise(ERR_LIB_PEM, 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_get_iv_length(enc)))
+ return 0;
+
+ return 1;
}
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 {
- PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
- return (0);
+ v = OPENSSL_hexchar2int(*from);
+ if (v < 0) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_BAD_IV_CHARS);
+ return 0;
}
from++;
to[i / 2] |= v << (long)((!(i & 1)) * 4);
}
*fromp = from;
- return (1);
+ return 1;
}
#ifndef OPENSSL_NO_STDIO
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
- PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
- return (0);
+ ERR_raise(ERR_LIB_PEM, 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);
+ return ret;
}
#endif
{
int nlen, n, i, j, outl;
unsigned char *buf = NULL;
- EVP_ENCODE_CTX ctx;
- int reason = ERR_R_BUF_LIB;
+ EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
+ int reason = 0;
+ int retval = 0;
+
+ if (ctx == NULL) {
+ reason = ERR_R_EVP_LIB;
+ goto err;
+ }
- EVP_EncodeInit(&ctx);
+ 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))
+ (BIO_write(bp, "-----\n", 6) != 6)) {
+ reason = ERR_R_BIO_LIB;
goto err;
+ }
- i = strlen(header);
+ i = header != NULL ? strlen(header) : 0;
if (i > 0) {
- if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
+ if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) {
+ reason = ERR_R_BIO_LIB;
goto err;
+ }
}
buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
- if (buf == NULL) {
- reason = ERR_R_MALLOC_FAILURE;
+ if (buf == NULL)
goto err;
- }
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 ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
+ if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n)) {
+ reason = ERR_R_EVP_LIB;
goto err;
+ }
+ if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) {
+ reason = ERR_R_BIO_LIB;
+ goto err;
+ }
i += outl;
len -= n;
j += n;
}
- EVP_EncodeFinal(&ctx, buf, &outl);
- if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
+ EVP_EncodeFinal(ctx, buf, &outl);
+ if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) {
+ reason = ERR_R_BIO_LIB;
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))
+ (BIO_write(bp, "-----\n", 6) != 6)) {
+ reason = ERR_R_BIO_LIB;
goto err;
- return (i + outl);
- err:
- if (buf) {
- OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
- OPENSSL_free(buf);
}
- PEMerr(PEM_F_PEM_WRITE_BIO, reason);
- return (0);
+ retval = i + outl;
+
+ err:
+ if (retval == 0 && reason != 0)
+ ERR_raise(ERR_LIB_PEM, reason);
+ EVP_ENCODE_CTX_free(ctx);
+ OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
+ return retval;
}
#ifndef OPENSSL_NO_STDIO
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
- PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
- return (0);
+ ERR_raise(ERR_LIB_PEM, 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);
+ return ret;
}
#endif
-int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
- long *len)
+/* Some helpers for PEM_read_bio_ex(). */
+static int sanitize_line(char *linebuf, int len, unsigned int flags, int first_call)
{
- 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);
- PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
- return (0);
- }
-
- buf[254] = '\0';
- for (;;) {
- i = BIO_gets(bp, buf, 254);
-
- if (i <= 0) {
- PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE);
- goto err;
+ int i;
+ if (first_call) {
+ /* Other BOMs imply unsupported multibyte encoding,
+ * so don't strip them and let the error raise */
+ const unsigned char utf8_bom[3] = {0xEF, 0xBB, 0xBF};
+
+ if (len > 3 && memcmp(linebuf, utf8_bom, 3) == 0) {
+ memmove(linebuf, linebuf + 3, len - 3);
+ linebuf[len - 3] = 0;
+ len -= 3;
}
+ }
- while ((i >= 0) && (buf[i] <= ' '))
- i--;
- buf[++i] = '\n';
- buf[++i] = '\0';
+ if (flags & PEM_FLAG_EAY_COMPATIBLE) {
+ /* Strip trailing whitespace */
+ while ((len >= 0) && (linebuf[len] <= ' '))
+ len--;
+ /* Go back to whitespace before applying uniform line ending. */
+ len++;
+ } else if (flags & PEM_FLAG_ONLY_B64) {
+ for (i = 0; i < len; ++i) {
+ if (!ossl_isbase64(linebuf[i]) || linebuf[i] == '\n'
+ || linebuf[i] == '\r')
+ break;
+ }
+ len = i;
+ } else {
+ /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip
+ * control characters in-place and let everything through. */
+ for (i = 0; i < len; ++i) {
+ if (linebuf[i] == '\n' || linebuf[i] == '\r')
+ break;
+ if (ossl_iscntrl(linebuf[i]))
+ linebuf[i] = ' ';
+ }
+ len = i;
+ }
+ /* The caller allocated LINESIZE+1, so this is safe. */
+ linebuf[len++] = '\n';
+ linebuf[len] = '\0';
+ return len;
+}
- if (strncmp(buf, "-----BEGIN ", 11) == 0) {
- i = strlen(&(buf[11]));
+#define LINESIZE 255
+/* Note trailing spaces for begin and end. */
+#define BEGINSTR "-----BEGIN "
+#define ENDSTR "-----END "
+#define TAILSTR "-----\n"
+#define BEGINLEN ((int)(sizeof(BEGINSTR) - 1))
+#define ENDLEN ((int)(sizeof(ENDSTR) - 1))
+#define TAILLEN ((int)(sizeof(TAILSTR) - 1))
+static int get_name(BIO *bp, char **name, unsigned int flags)
+{
+ char *linebuf;
+ int ret = 0;
+ int len;
+ int first_call = 1;
- if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
- continue;
- if (!BUF_MEM_grow(nameB, i + 9)) {
- PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- memcpy(nameB->data, &(buf[11]), i - 6);
- nameB->data[i - 6] = '\0';
- break;
+ /*
+ * Need to hold trailing NUL (accounted for by BIO_gets() and the newline
+ * that will be added by sanitize_line() (the extra '1').
+ */
+ linebuf = PEM_MALLOC(LINESIZE + 1, flags);
+ if (linebuf == NULL)
+ return 0;
+
+ do {
+ len = BIO_gets(bp, linebuf, LINESIZE);
+
+ if (len <= 0) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_NO_START_LINE);
+ goto err;
}
- }
- hl = 0;
- if (!BUF_MEM_grow(headerB, 256)) {
- PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
+
+ /* Strip trailing garbage and standardize ending. */
+ len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64, first_call);
+ first_call = 0;
+
+ /* Allow leading empty or non-matching lines. */
+ } while (!HAS_PREFIX(linebuf, BEGINSTR)
+ || len < TAILLEN
+ || !HAS_PREFIX(linebuf + len - TAILLEN, TAILSTR));
+ linebuf[len - TAILLEN] = '\0';
+ len = len - BEGINLEN - TAILLEN + 1;
+ *name = PEM_MALLOC(len, flags);
+ if (*name == NULL)
goto err;
- }
- headerB->data[0] = '\0';
- for (;;) {
- i = BIO_gets(bp, buf, 254);
- if (i <= 0)
- break;
+ memcpy(*name, linebuf + BEGINLEN, len);
+ ret = 1;
- while ((i >= 0) && (buf[i] <= ' '))
- i--;
- buf[++i] = '\n';
- buf[++i] = '\0';
+err:
+ PEM_FREE(linebuf, flags, LINESIZE + 1);
+ return ret;
+}
- if (buf[0] == '\n')
- break;
- if (!BUF_MEM_grow(headerB, hl + i + 9)) {
- PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
+/* Keep track of how much of a header we've seen. */
+enum header_status {
+ MAYBE_HEADER,
+ IN_HEADER,
+ POST_HEADER
+};
+
+/**
+ * Extract the optional PEM header, with details on the type of content and
+ * any encryption used on the contents, and the bulk of the data from the bio.
+ * The end of the header is marked by a blank line; if the end-of-input marker
+ * is reached prior to a blank line, there is no header.
+ *
+ * The header and data arguments are BIO** since we may have to swap them
+ * if there is no header, for efficiency.
+ *
+ * We need the name of the PEM-encoded type to verify the end string.
+ */
+static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name,
+ unsigned int flags)
+{
+ BIO *tmp = *header;
+ char *linebuf, *p;
+ int len, ret = 0, end = 0, prev_partial_line_read = 0, partial_line_read = 0;
+ /* 0 if not seen (yet), 1 if reading header, 2 if finished header */
+ enum header_status got_header = MAYBE_HEADER;
+ unsigned int flags_mask;
+ size_t namelen;
+
+ /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline
+ * that will be added by sanitize_line() (the extra '1'). */
+ linebuf = PEM_MALLOC(LINESIZE + 1, flags);
+ if (linebuf == NULL)
+ return 0;
+
+ while(1) {
+ flags_mask = ~0u;
+ len = BIO_gets(bp, linebuf, LINESIZE);
+ if (len <= 0) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE);
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)) {
- PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- dataB->data[0] = '\0';
- if (!nohead) {
- for (;;) {
- i = BIO_gets(bp, buf, 254);
- if (i <= 0)
- break;
+ /*
+ * Check if line has been read completely or if only part of the line
+ * has been read. Keep the previous value to ignore newlines that
+ * appear due to reading a line up until the char before the newline.
+ */
+ prev_partial_line_read = partial_line_read;
+ partial_line_read = len == LINESIZE-1 && linebuf[LINESIZE-2] != '\n';
- while ((i >= 0) && (buf[i] <= ' '))
- i--;
- buf[++i] = '\n';
- buf[++i] = '\0';
+ if (got_header == MAYBE_HEADER) {
+ if (memchr(linebuf, ':', len) != NULL)
+ got_header = IN_HEADER;
+ }
+ if (HAS_PREFIX(linebuf, ENDSTR) || got_header == IN_HEADER)
+ flags_mask &= ~PEM_FLAG_ONLY_B64;
+ len = sanitize_line(linebuf, len, flags & flags_mask, 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)) {
- PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
- goto err;
+ /* Check for end of header. */
+ if (linebuf[0] == '\n') {
+ /*
+ * If previous line has been read only partially this newline is a
+ * regular newline at the end of a line and not an empty line.
+ */
+ if (!prev_partial_line_read) {
+ if (got_header == POST_HEADER) {
+ /* Another blank line is an error. */
+ ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE);
+ goto err;
+ }
+ got_header = POST_HEADER;
+ tmp = *data;
}
- 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';
+ continue;
+ }
- break;
+ /* Check for end of stream (which means there is no header). */
+ p = linebuf;
+ if (CHECK_AND_SKIP_PREFIX(p, ENDSTR)) {
+ namelen = strlen(name);
+ if (strncmp(p, name, namelen) != 0 ||
+ !HAS_PREFIX(p + namelen, TAILSTR)) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE);
+ goto err;
+ }
+ if (got_header == MAYBE_HEADER) {
+ *header = *data;
+ *data = tmp;
}
+ break;
+ } else if (end) {
+ /* Malformed input; short line not at end of data. */
+ ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE);
+ goto err;
+ }
+ /*
+ * Else, a line of text -- could be header or data; we don't
+ * know yet. Just pass it through.
+ */
+ if (BIO_puts(tmp, linebuf) < 0)
+ goto err;
+ /*
+ * Only encrypted files need the line length check applied.
+ */
+ if (got_header == POST_HEADER) {
+ /* 65 includes the trailing newline */
+ if (len > 65)
+ goto err;
+ if (len < 65)
+ end = 1;
}
- } 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)) {
- PEMerr(PEM_F_PEM_READ_BIO, 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) {
- PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
- goto err;
+ ret = 1;
+err:
+ PEM_FREE(linebuf, flags, LINESIZE + 1);
+ return ret;
+}
+
+/**
+ * Read in PEM-formatted data from the given BIO.
+ *
+ * By nature of the PEM format, all content must be printable ASCII (except
+ * for line endings). Other characters are malformed input and will be rejected.
+ */
+int PEM_read_bio_ex(BIO *bp, char **name_out, char **header,
+ unsigned char **data, long *len_out, unsigned int flags)
+{
+ EVP_ENCODE_CTX *ctx = NULL;
+ const BIO_METHOD *bmeth;
+ BIO *headerB = NULL, *dataB = NULL;
+ char *name = NULL;
+ int len, taillen, headerlen, ret = 0;
+ BUF_MEM *buf_mem;
+
+ *len_out = 0;
+ *name_out = *header = NULL;
+ *data = NULL;
+ if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) {
+ /* These two are mutually incompatible; bail out. */
+ ERR_raise(ERR_LIB_PEM, ERR_R_PASSED_INVALID_ARGUMENT);
+ goto end;
}
- 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;
+ bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem();
+
+ headerB = BIO_new(bmeth);
+ dataB = BIO_new(bmeth);
+ if (headerB == NULL || dataB == NULL) {
+ ERR_raise(ERR_LIB_PEM, ERR_R_BIO_LIB);
+ goto end;
}
- bl += k;
- if (bl == 0)
- goto err;
- *name = nameB->data;
- *header = headerB->data;
- *data = (unsigned char *)dataB->data;
- *len = bl;
- OPENSSL_free(nameB);
- OPENSSL_free(headerB);
- OPENSSL_free(dataB);
- return (1);
- err:
- BUF_MEM_free(nameB);
- BUF_MEM_free(headerB);
- BUF_MEM_free(dataB);
- return (0);
+ if (!get_name(bp, &name, flags))
+ goto end;
+ if (!get_header_and_data(bp, &headerB, &dataB, name, flags))
+ goto end;
+
+ BIO_get_mem_ptr(dataB, &buf_mem);
+ len = buf_mem->length;
+
+ /* There was no data in the PEM file */
+ if (len == 0)
+ goto end;
+
+ ctx = EVP_ENCODE_CTX_new();
+ if (ctx == NULL) {
+ ERR_raise(ERR_LIB_PEM, ERR_R_EVP_LIB);
+ goto end;
+ }
+
+ EVP_DecodeInit(ctx);
+ if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len,
+ (unsigned char*)buf_mem->data, len) < 0
+ || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]),
+ &taillen) < 0) {
+ ERR_raise(ERR_LIB_PEM, PEM_R_BAD_BASE64_DECODE);
+ goto end;
+ }
+ len += taillen;
+ buf_mem->length = len;
+
+ headerlen = BIO_get_mem_data(headerB, NULL);
+ *header = PEM_MALLOC(headerlen + 1, flags);
+ *data = PEM_MALLOC(len, flags);
+ if (*header == NULL || *data == NULL)
+ goto out_free;
+ if (headerlen != 0 && BIO_read(headerB, *header, headerlen) != headerlen)
+ goto out_free;
+ (*header)[headerlen] = '\0';
+ if (BIO_read(dataB, *data, len) != len)
+ goto out_free;
+ *len_out = len;
+ *name_out = name;
+ name = NULL;
+ ret = 1;
+ goto end;
+
+out_free:
+ PEM_FREE(*header, flags, 0);
+ *header = NULL;
+ PEM_FREE(*data, flags, 0);
+ *data = NULL;
+end:
+ EVP_ENCODE_CTX_free(ctx);
+ PEM_FREE(name, flags, 0);
+ BIO_free(headerB);
+ BIO_free(dataB);
+ return ret;
+}
+
+int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
+ long *len)
+{
+ return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE);
}
/*
* string "RSA".
*/
-int pem_check_suffix(const char *pem_str, const char *suffix)
+int ossl_pem_check_suffix(const char *pem_str, const char *suffix)
{
int pem_len = strlen(pem_str);
int suffix_len = strlen(suffix);
projects / openssl.git / blobdiff