-/* crypto/asn1/a_d2i_fp.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. 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.
- *
- * 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 "cryptlib.h"
+#include <limits.h>
+#include "internal/cryptlib.h"
+#include "internal/numbers.h"
#include <openssl/buffer.h>
-#include <openssl/asn1_mac.h>
+#include <openssl/asn1.h>
static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);
#ifndef NO_OLD_ASN1
-#ifndef OPENSSL_NO_FP_API
-
-void *ASN1_d2i_fp(void *(*xnew)(void), d2i_of_void *d2i, FILE *in, void **x)
- {
- BIO *b;
- void *ret;
-
- if ((b=BIO_new(BIO_s_file())) == NULL)
- {
- ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
- return(NULL);
- }
- BIO_set_fp(b,in,BIO_NOCLOSE);
- ret=ASN1_d2i_bio(xnew,d2i,b,x);
- BIO_free(b);
- return(ret);
- }
-#endif
-
-void *ASN1_d2i_bio(void *(*xnew)(void), d2i_of_void *d2i, BIO *in, void **x)
- {
- BUF_MEM *b = NULL;
- const unsigned char *p;
- void *ret=NULL;
- int len;
-
- len = asn1_d2i_read_bio(in, &b);
- if(len < 0) goto err;
-
- p=(unsigned char *)b->data;
- ret=d2i(x,&p,len);
-err:
- if (b != NULL) BUF_MEM_free(b);
- return(ret);
- }
+# ifndef OPENSSL_NO_STDIO
+
+void *ASN1_d2i_fp(void *(*xnew) (void), d2i_of_void *d2i, FILE *in, void **x)
+{
+ BIO *b;
+ void *ret;
+
+ if ((b = BIO_new(BIO_s_file())) == NULL) {
+ ASN1err(ASN1_F_ASN1_D2I_FP, ERR_R_BUF_LIB);
+ return (NULL);
+ }
+ BIO_set_fp(b, in, BIO_NOCLOSE);
+ ret = ASN1_d2i_bio(xnew, d2i, b, x);
+ BIO_free(b);
+ return (ret);
+}
+# endif
+
+void *ASN1_d2i_bio(void *(*xnew) (void), d2i_of_void *d2i, BIO *in, void **x)
+{
+ BUF_MEM *b = NULL;
+ const unsigned char *p;
+ void *ret = NULL;
+ int len;
+
+ len = asn1_d2i_read_bio(in, &b);
+ if (len < 0)
+ goto err;
+
+ p = (unsigned char *)b->data;
+ ret = d2i(x, &p, len);
+ err:
+ BUF_MEM_free(b);
+ return (ret);
+}
#endif
void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
- {
- BUF_MEM *b = NULL;
- const unsigned char *p;
- void *ret=NULL;
- int len;
-
- len = asn1_d2i_read_bio(in, &b);
- if(len < 0) goto err;
-
- p=(const unsigned char *)b->data;
- ret=ASN1_item_d2i(x,&p,len, it);
-err:
- if (b != NULL) BUF_MEM_free(b);
- return(ret);
- }
-
-#ifndef OPENSSL_NO_FP_API
+{
+ BUF_MEM *b = NULL;
+ const unsigned char *p;
+ void *ret = NULL;
+ int len;
+
+ len = asn1_d2i_read_bio(in, &b);
+ if (len < 0)
+ goto err;
+
+ p = (const unsigned char *)b->data;
+ ret = ASN1_item_d2i(x, &p, len, it);
+ err:
+ BUF_MEM_free(b);
+ return (ret);
+}
+
+#ifndef OPENSSL_NO_STDIO
void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
- {
- BIO *b;
- char *ret;
-
- if ((b=BIO_new(BIO_s_file())) == NULL)
- {
- ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
- return(NULL);
- }
- BIO_set_fp(b,in,BIO_NOCLOSE);
- ret=ASN1_item_d2i_bio(it,b,x);
- BIO_free(b);
- return(ret);
- }
+{
+ BIO *b;
+ char *ret;
+
+ if ((b = BIO_new(BIO_s_file())) == NULL) {
+ ASN1err(ASN1_F_ASN1_ITEM_D2I_FP, ERR_R_BUF_LIB);
+ return (NULL);
+ }
+ BIO_set_fp(b, in, BIO_NOCLOSE);
+ ret = ASN1_item_d2i_bio(it, b, x);
+ BIO_free(b);
+ return (ret);
+}
#endif
#define HEADER_SIZE 8
+#define ASN1_CHUNK_INITIAL_SIZE (16 * 1024)
static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
- {
- BUF_MEM *b;
- unsigned char *p;
- int i;
- int ret=-1;
- ASN1_const_CTX c;
- int want=HEADER_SIZE;
- int eos=0;
-#if defined(__GNUC__) && defined(__ia64)
- /* pathetic compiler bug in all known versions as of Nov. 2002 */
- long off=0;
-#else
- int off=0;
-#endif
- int len=0;
-
- b=BUF_MEM_new();
- if (b == NULL)
- {
- ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
- return -1;
- }
-
- ERR_clear_error();
- for (;;)
- {
- if (want >= (len-off))
- {
- want-=(len-off);
-
- if (!BUF_MEM_grow_clean(b,len+want))
- {
- ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- i=BIO_read(in,&(b->data[len]),want);
- if ((i < 0) && ((len-off) == 0))
- {
- ASN1err(ASN1_F_ASN1_D2I_BIO,ASN1_R_NOT_ENOUGH_DATA);
- goto err;
- }
- if (i > 0)
- len+=i;
- }
- /* else data already loaded */
-
- p=(unsigned char *)&(b->data[off]);
- c.p=p;
- c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass),
- len-off);
- if (c.inf & 0x80)
- {
- unsigned long e;
-
- e=ERR_GET_REASON(ERR_peek_error());
- if (e != ASN1_R_TOO_LONG)
- goto err;
- else
- ERR_clear_error(); /* clear error */
- }
- i=c.p-p;/* header length */
- off+=i; /* end of data */
-
- if (c.inf & 1)
- {
- /* no data body so go round again */
- eos++;
- want=HEADER_SIZE;
- }
- else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC))
- {
- /* eos value, so go back and read another header */
- eos--;
- if (eos <= 0)
- break;
- else
- want=HEADER_SIZE;
- }
- else
- {
- /* suck in c.slen bytes of data */
- want=(int)c.slen;
- if (want > (len-off))
- {
- want-=(len-off);
- if (!BUF_MEM_grow_clean(b,len+want))
- {
- ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- while (want > 0)
- {
- i=BIO_read(in,&(b->data[len]),want);
- if (i <= 0)
- {
- ASN1err(ASN1_F_ASN1_D2I_BIO,
- ASN1_R_NOT_ENOUGH_DATA);
- goto err;
- }
- len+=i;
- want -= i;
- }
- }
- off+=(int)c.slen;
- if (eos <= 0)
- {
- break;
- }
- else
- want=HEADER_SIZE;
- }
- }
-
- *pb = b;
- return off;
-err:
- if (b != NULL) BUF_MEM_free(b);
- return(ret);
- }
+{
+ BUF_MEM *b;
+ unsigned char *p;
+ int i;
+ size_t want = HEADER_SIZE;
+ uint32_t eos = 0;
+ size_t off = 0;
+ size_t len = 0;
+
+ const unsigned char *q;
+ long slen;
+ int inf, tag, xclass;
+
+ b = BUF_MEM_new();
+ if (b == NULL) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
+ return -1;
+ }
+
+ ERR_clear_error();
+ for (;;) {
+ if (want >= (len - off)) {
+ want -= (len - off);
+
+ if (len + want < len || !BUF_MEM_grow_clean(b, len + want)) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ i = BIO_read(in, &(b->data[len]), want);
+ if ((i < 0) && ((len - off) == 0)) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_NOT_ENOUGH_DATA);
+ goto err;
+ }
+ if (i > 0) {
+ if (len + i < len) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
+ goto err;
+ }
+ len += i;
+ }
+ }
+ /* else data already loaded */
+
+ p = (unsigned char *)&(b->data[off]);
+ q = p;
+ inf = ASN1_get_object(&q, &slen, &tag, &xclass, len - off);
+ if (inf & 0x80) {
+ unsigned long e;
+
+ e = ERR_GET_REASON(ERR_peek_error());
+ if (e != ASN1_R_TOO_LONG)
+ goto err;
+ else
+ ERR_clear_error(); /* clear error */
+ }
+ i = q - p; /* header length */
+ off += i; /* end of data */
+
+ if (inf & 1) {
+ /* no data body so go round again */
+ if (eos == UINT32_MAX) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_HEADER_TOO_LONG);
+ goto err;
+ }
+ eos++;
+ want = HEADER_SIZE;
+ } else if (eos && (slen == 0) && (tag == V_ASN1_EOC)) {
+ /* eos value, so go back and read another header */
+ eos--;
+ if (eos == 0)
+ break;
+ else
+ want = HEADER_SIZE;
+ } else {
+ /* suck in slen bytes of data */
+ want = slen;
+ if (want > (len - off)) {
+ size_t chunk_max = ASN1_CHUNK_INITIAL_SIZE;
+
+ want -= (len - off);
+ if (want > INT_MAX /* BIO_read takes an int length */ ||
+ len + want < len) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
+ goto err;
+ }
+ while (want > 0) {
+ /*
+ * Read content in chunks of increasing size
+ * so we can return an error for EOF without
+ * having to allocate the entire content length
+ * in one go.
+ */
+ size_t chunk = want > chunk_max ? chunk_max : want;
+
+ if (!BUF_MEM_grow_clean(b, len + chunk)) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ want -= chunk;
+ while (chunk > 0) {
+ i = BIO_read(in, &(b->data[len]), chunk);
+ if (i <= 0) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO,
+ ASN1_R_NOT_ENOUGH_DATA);
+ goto err;
+ }
+ /*
+ * This can't overflow because |len+want| didn't
+ * overflow.
+ */
+ len += i;
+ chunk -= i;
+ }
+ if (chunk_max < INT_MAX/2)
+ chunk_max *= 2;
+ }
+ }
+ if (off + slen < off) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
+ goto err;
+ }
+ off += slen;
+ if (eos == 0) {
+ break;
+ } else
+ want = HEADER_SIZE;
+ }
+ }
+
+ if (off > INT_MAX) {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
+ goto err;
+ }
+
+ *pb = b;
+ return off;
+ err:
+ BUF_MEM_free(b);
+ return -1;
+}
projects / openssl.git / blobdiff