254 lines
6.9 KiB
C
254 lines
6.9 KiB
C
/* crypto/bio/bf_nbio.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 <errno.h>
|
|
#include "cryptlib.h"
|
|
#include <openssl/rand.h>
|
|
#include <openssl/bio.h>
|
|
|
|
/*
|
|
* BIO_put and BIO_get both add to the digest, BIO_gets returns the digest
|
|
*/
|
|
|
|
static int nbiof_write(BIO *h, const char *buf, int num);
|
|
static int nbiof_read(BIO *h, char *buf, int size);
|
|
static int nbiof_puts(BIO *h, const char *str);
|
|
static int nbiof_gets(BIO *h, char *str, int size);
|
|
static long nbiof_ctrl(BIO *h, int cmd, long arg1, void *arg2);
|
|
static int nbiof_new(BIO *h);
|
|
static int nbiof_free(BIO *data);
|
|
static long nbiof_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
|
|
typedef struct nbio_test_st {
|
|
/* only set if we sent a 'should retry' error */
|
|
int lrn;
|
|
int lwn;
|
|
} NBIO_TEST;
|
|
|
|
static BIO_METHOD methods_nbiof = {
|
|
BIO_TYPE_NBIO_TEST,
|
|
"non-blocking IO test filter",
|
|
nbiof_write,
|
|
nbiof_read,
|
|
nbiof_puts,
|
|
nbiof_gets,
|
|
nbiof_ctrl,
|
|
nbiof_new,
|
|
nbiof_free,
|
|
nbiof_callback_ctrl,
|
|
};
|
|
|
|
BIO_METHOD *BIO_f_nbio_test(void)
|
|
{
|
|
return (&methods_nbiof);
|
|
}
|
|
|
|
static int nbiof_new(BIO *bi)
|
|
{
|
|
NBIO_TEST *nt;
|
|
|
|
if (!(nt = (NBIO_TEST *)OPENSSL_malloc(sizeof(NBIO_TEST))))
|
|
return (0);
|
|
nt->lrn = -1;
|
|
nt->lwn = -1;
|
|
bi->ptr = (char *)nt;
|
|
bi->init = 1;
|
|
bi->flags = 0;
|
|
return (1);
|
|
}
|
|
|
|
static int nbiof_free(BIO *a)
|
|
{
|
|
if (a == NULL)
|
|
return (0);
|
|
if (a->ptr != NULL)
|
|
OPENSSL_free(a->ptr);
|
|
a->ptr = NULL;
|
|
a->init = 0;
|
|
a->flags = 0;
|
|
return (1);
|
|
}
|
|
|
|
static int nbiof_read(BIO *b, char *out, int outl)
|
|
{
|
|
int ret = 0;
|
|
#if 1
|
|
int num;
|
|
unsigned char n;
|
|
#endif
|
|
|
|
if (out == NULL)
|
|
return (0);
|
|
if (b->next_bio == NULL)
|
|
return (0);
|
|
|
|
BIO_clear_retry_flags(b);
|
|
#if 1
|
|
if (RAND_pseudo_bytes(&n, 1) < 0)
|
|
return -1;
|
|
num = (n & 0x07);
|
|
|
|
if (outl > num)
|
|
outl = num;
|
|
|
|
if (num == 0) {
|
|
ret = -1;
|
|
BIO_set_retry_read(b);
|
|
} else
|
|
#endif
|
|
{
|
|
ret = BIO_read(b->next_bio, out, outl);
|
|
if (ret < 0)
|
|
BIO_copy_next_retry(b);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static int nbiof_write(BIO *b, const char *in, int inl)
|
|
{
|
|
NBIO_TEST *nt;
|
|
int ret = 0;
|
|
int num;
|
|
unsigned char n;
|
|
|
|
if ((in == NULL) || (inl <= 0))
|
|
return (0);
|
|
if (b->next_bio == NULL)
|
|
return (0);
|
|
nt = (NBIO_TEST *)b->ptr;
|
|
|
|
BIO_clear_retry_flags(b);
|
|
|
|
#if 1
|
|
if (nt->lwn > 0) {
|
|
num = nt->lwn;
|
|
nt->lwn = 0;
|
|
} else {
|
|
if (RAND_pseudo_bytes(&n, 1) < 0)
|
|
return -1;
|
|
num = (n & 7);
|
|
}
|
|
|
|
if (inl > num)
|
|
inl = num;
|
|
|
|
if (num == 0) {
|
|
ret = -1;
|
|
BIO_set_retry_write(b);
|
|
} else
|
|
#endif
|
|
{
|
|
ret = BIO_write(b->next_bio, in, inl);
|
|
if (ret < 0) {
|
|
BIO_copy_next_retry(b);
|
|
nt->lwn = inl;
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static long nbiof_ctrl(BIO *b, int cmd, long num, void *ptr)
|
|
{
|
|
long ret;
|
|
|
|
if (b->next_bio == NULL)
|
|
return (0);
|
|
switch (cmd) {
|
|
case BIO_C_DO_STATE_MACHINE:
|
|
BIO_clear_retry_flags(b);
|
|
ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
|
|
BIO_copy_next_retry(b);
|
|
break;
|
|
case BIO_CTRL_DUP:
|
|
ret = 0L;
|
|
break;
|
|
default:
|
|
ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
|
|
break;
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static long nbiof_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
|
|
{
|
|
long ret = 1;
|
|
|
|
if (b->next_bio == NULL)
|
|
return (0);
|
|
switch (cmd) {
|
|
default:
|
|
ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
|
|
break;
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static int nbiof_gets(BIO *bp, char *buf, int size)
|
|
{
|
|
if (bp->next_bio == NULL)
|
|
return (0);
|
|
return (BIO_gets(bp->next_bio, buf, size));
|
|
}
|
|
|
|
static int nbiof_puts(BIO *bp, const char *str)
|
|
{
|
|
if (bp->next_bio == NULL)
|
|
return (0);
|
|
return (BIO_puts(bp->next_bio, str));
|
|
}
|