--- /dev/null
+/* crypto/asn1/a_d2i_fp.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.
+ *
+ * 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.]
+ */
+
+#include <stdio.h>
+#include <limits.h>
+#include "cryptlib.h"
+#include <openssl/buffer.h>
+#include <openssl/asn1_mac.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);
+ }
+
+#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
+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_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
+static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
+ {
+ BUF_MEM *b;
+ unsigned char *p;
+ int i;
+ ASN1_const_CTX c;
+ size_t want=HEADER_SIZE;
+ int eos=0;
+ size_t off=0;
+ size_t len=0;
+
+ 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]);
+ 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++;
+ if (eos < 0)
+ {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_HEADER_TOO_LONG);
+ goto err;
+ }
+ 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=c.slen;
+ if (want > (len-off))
+ {
+ 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;
+ }
+ if (!BUF_MEM_grow_clean(b,len+want))
+ {
+ ASN1err(ASN1_F_ASN1_D2I_READ_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_READ_BIO,
+ ASN1_R_NOT_ENOUGH_DATA);
+ goto err;
+ }
+ /* This can't overflow because
+ * |len+want| didn't overflow. */
+ len+=i;
+ want-=i;
+ }
+ }
+ if (off + c.slen < off)
+ {
+ ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
+ goto err;
+ }
+ off+=c.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:
+ if (b != NULL) BUF_MEM_free(b);
+ return -1;
+ }
projects / cassiopeia.git / blobdiff