bio_ber.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/* 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
* 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 <errno.h>
#include "cryptlib.h"
/*static int ber_puts(BIO *h,char *str); */
/*static int ber_gets(BIO *h,char *str,int size); */
#define BER_BUF_SIZE (32)
/* This is used to hold the state of the BER objects being read. */
typedef struct ber_struct
{
int tag;
int class;
long length;
int inf;
int num_left;
int depth;
} BER_CTX;
typedef struct bio_ber_struct
{
int tag;
int class;
long length;
int inf;
/* most of the following are used when doing non-blocking IO */
/* reading */
int depth; /* used with indefinite encoding. */
int finished; /* No more read data */
/* writting */
char *w_addr;
int w_offset;
int w_left;
int buf_len;
int buf_off;
unsigned char buf[BER_BUF_SIZE];
} BIO_BER_CTX;
static BIO_METHOD methods_ber=
{
BIO_TYPE_CIPHER,"cipher",
NULL, /* ber_puts, */
NULL, /* ber_gets, */
};
BIO_METHOD *BIO_f_ber(void)
{
return(&methods_ber);
}
{
return(1);
}
{
BIO_BER_CTX *b;
if (a == NULL) return(0);
b=(BIO_BER_CTX *)a->ptr;
OPENSSL_free(a->ptr);
a->init=0;
a->flags=0;
return(1);
}
{
char buf[64];
int i,j,n;
int ret;
unsigned char *p;
unsigned long length
int tag;
int class;
long max;
/* Pack the buffer down if there is a hole at the front */
{
for (i=0; i<n; i++)
{
p[0]=p[j];
p++;
}
}
/* If there is more room, read some more data */
if (i)
{
if (i <= 0)
{
return(i);
}
else
}
if (ret & 0x80)
{
{
ERR_get_error(); /* clear the error */
}
return(-1);
}
/* We have no error, we have a header, so make use of it */
{
return(-1);
}
if (ret & 0x01)
if (ret & V_ASN1_CONSTRUCTED)
}
{
int ret=0,i,n;
/* First see if we are half way through reading a block */
{
else
n=outl;
if (i <= 0)
{
return(i);
}
outl-=i;
ret+=i;
{
}
if (outl <= 0)
return(ret);
else
goto again;
}
else /* we need to read another BER header */
{
}
}
{
int ret=0,n,i;
while (n > 0)
{
if (i <= 0)
{
return(i);
}
n-=i;
}
/* at this point all pending data has been written */
while (inl > 0)
{
(unsigned char *)in,n);
inl-=n;
in+=n;
while (n > 0)
{
if (i <= 0)
{
return(i);
}
n-=i;
}
}
return(ret);
}
{
long ret=1;
int i;
switch (cmd)
{
case BIO_CTRL_RESET:
break;
case BIO_CTRL_EOF: /* More to read */
ret=1;
else
break;
case BIO_CTRL_WPENDING:
if (ret <= 0)
break;
case BIO_CTRL_PENDING: /* More to read in buffer */
if (ret <= 0)
break;
case BIO_CTRL_FLUSH:
/* do a final write */
{
if (i < 0)
{
ret=i;
break;
}
}
{
if (ret <= 0) break;
/* push out the bytes */
goto again;
}
/* Finally flush the underlying BIO */
break;
case BIO_C_GET_CIPHER_STATUS:
break;
case BIO_C_DO_STATE_MACHINE:
break;
case BIO_CTRL_DUP:
break;
default:
break;
}
return(ret);
}
{
long ret=1;
switch (cmd)
{
default:
break;
}
return(ret);
}
/*
void BIO_set_cipher_ctx(b,c)
BIO *b;
EVP_CIPHER_ctx *c;
{
if (b == NULL) return;
if ((b->callback != NULL) &&
(b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
return;
b->init=1;
ctx=(BIO_ENC_CTX *)b->ptr;
memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));
if (b->callback != NULL)
b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
}
*/
int e)
{
if (b == NULL) return;
return;
b->init=1;
}