bio_b64.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 b64_puts(BIO *h, const char *str); */
/*static int b64_gets(BIO *h, char *str, int size); */
#define B64_BLOCK_SIZE 1024
#define B64_BLOCK_SIZE2 768
#define B64_NONE 0
#define B64_ENCODE 1
#define B64_DECODE 2
typedef struct b64_struct
{
/*BIO *bio; moved to the BIO structure */
int buf_len;
int buf_off;
int tmp_len; /* used to find the start when decoding */
int tmp_nl; /* If true, scan until '\n' */
int encode;
int start; /* have we started decoding yet? */
int cont; /* <= 0 when finished */
char tmp[B64_BLOCK_SIZE];
} BIO_B64_CTX;
static BIO_METHOD methods_b64=
{
BIO_TYPE_BASE64,"base64 encoding",
NULL, /* b64_puts, */
NULL, /* b64_gets, */
};
BIO_METHOD *BIO_f_base64(void)
{
return(&methods_b64);
}
{
return(1);
}
{
if (a == NULL) return(0);
OPENSSL_free(a->ptr);
a->init=0;
a->flags=0;
return(1);
}
{
unsigned char *p,*q;
{
}
{
ret=i;
out+=i;
outl-=i;
{
}
}
/* At this point, we have room of outl bytes and an empty
* buffer, so we should read in some more. */
ret_code=0;
while (outl > 0)
{
break;
if (i <= 0)
{
ret_code=i;
/* Should be continue next time we are called? */
if (!BIO_should_retry(b->next_bio))
{
/* If buffer empty break */
break;
/* Fall through and process what we have */
else
i = 0;
}
/* else we retry and add more data to buffer */
else
break;
}
/* We need to scan, a line at a time until we
* have a valid line if we are starting. */
{
/* ctx->start=1; */
}
{
for (j=0; j<i; j++)
{
if (*(q++) != '\n') continue;
/* due to a previous very long line,
* we need to keep on scanning for a '\n'
* before we even start looking for
* base64 encoded stuff. */
{
p=q;
continue;
}
&num,p,q-p);
else
{
if (p != (unsigned char *)
{
i-=(p- (unsigned char *)
for (x=0; x < i; x++)
}
break;
}
p=q;
}
/* we fell off the end without starting */
if (j == i)
{
/* Is this is one long chunk?, if so, keep on
* reading until a new line. */
{
/* Check buffer full */
if (i == B64_BLOCK_SIZE)
{
}
}
else if (p != q) /* finished on a '\n' */
{
n=q-p;
}
/* else finished on a '\n' */
continue;
}
else
}
/* If buffer isn't full and we can retry then
* restart to read in more data.
*/
continue;
if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
{
int z,jj;
if (jj > 2)
{
{
z--;
z--;
}
}
/* z is now number of output bytes and jj is the
* number consumed */
if (jj != i)
{
}
if (z > 0)
{
i=1;
}
else
i=z;
}
else
{
}
if (i < 0)
{
ret_code=0;
break;
}
else
i=outl;
ret+=i;
{
}
outl-=i;
out+=i;
}
}
{
{
}
while (n > 0)
{
if (i <= 0)
{
return(i);
}
n-=i;
}
/* at this point all pending data has been written */
while (inl > 0)
{
if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
{
{
/* There's a teoretical possibility for this */
if (n > inl)
n=inl;
break;
/* Since we're now done using the temporary
buffer, the length should be 0'd */
}
else
{
if (n < 3)
{
break;
}
n-=n%3;
(unsigned char *)in,n);
}
}
else
{
(unsigned char *)in,n);
}
inl-=n;
in+=n;
while (n > 0)
{
if (i <= 0)
{
}
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: /* More to write in buffer */
ret=1;
else 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)
return i;
}
if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
{
{
goto again;
}
}
{
/* push out the bytes */
goto again;
}
/* Finally flush the underlying BIO */
break;
case BIO_C_DO_STATE_MACHINE:
break;
case BIO_CTRL_DUP:
break;
case BIO_CTRL_INFO:
case BIO_CTRL_GET:
case BIO_CTRL_SET:
default:
break;
}
return(ret);
}
{
long ret=1;
switch (cmd)
{
default:
break;
}
return(ret);
}