270 lines
6.4 KiB
C
Executable File
270 lines
6.4 KiB
C
Executable File
/* $OpenBSD: bss_fd.c,v 1.20 2022/01/07 09:02:17 tb Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <openssl/opensslconf.h>
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#include <openssl/bio.h>
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#include "bio_local.h"
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static int fd_write(BIO *h, const char *buf, int num);
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static int fd_read(BIO *h, char *buf, int size);
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static int fd_puts(BIO *h, const char *str);
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static int fd_gets(BIO *h, char *buf, int size);
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static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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static int fd_new(BIO *h);
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static int fd_free(BIO *data);
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int BIO_fd_should_retry(int s);
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static const BIO_METHOD methods_fdp = {
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.type = BIO_TYPE_FD,
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.name = "file descriptor",
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.bwrite = fd_write,
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.bread = fd_read,
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.bputs = fd_puts,
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.bgets = fd_gets,
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.ctrl = fd_ctrl,
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.create = fd_new,
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.destroy = fd_free
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};
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const BIO_METHOD *
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BIO_s_fd(void)
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{
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return (&methods_fdp);
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}
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BIO *
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BIO_new_fd(int fd, int close_flag)
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{
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BIO *ret;
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ret = BIO_new(BIO_s_fd());
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if (ret == NULL)
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return (NULL);
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BIO_set_fd(ret, fd, close_flag);
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return (ret);
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}
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static int
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fd_new(BIO *bi)
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{
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bi->init = 0;
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bi->num = -1;
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bi->ptr = NULL;
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bi->flags=0;
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return (1);
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}
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static int
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fd_free(BIO *a)
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{
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if (a == NULL)
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return (0);
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if (a->shutdown) {
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if (a->init) {
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close(a->num);
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}
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a->init = 0;
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a->flags = 0;
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}
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return (1);
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}
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static int
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fd_read(BIO *b, char *out, int outl)
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{
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int ret = 0;
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if (out != NULL) {
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errno = 0;
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ret = read(b->num, out, outl);
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BIO_clear_retry_flags(b);
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if (ret <= 0) {
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if (BIO_fd_should_retry(ret))
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BIO_set_retry_read(b);
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}
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}
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return (ret);
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}
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static int
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fd_write(BIO *b, const char *in, int inl)
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{
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int ret;
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errno = 0;
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ret = write(b->num, in, inl);
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BIO_clear_retry_flags(b);
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if (ret <= 0) {
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if (BIO_fd_should_retry(ret))
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BIO_set_retry_write(b);
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}
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return (ret);
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}
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static long
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fd_ctrl(BIO *b, int cmd, long num, void *ptr)
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{
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long ret = 1;
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int *ip;
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switch (cmd) {
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case BIO_CTRL_RESET:
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num = 0;
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case BIO_C_FILE_SEEK:
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ret = (long)lseek(b->num, num, 0);
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break;
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case BIO_C_FILE_TELL:
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case BIO_CTRL_INFO:
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ret = (long)lseek(b->num, 0, 1);
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break;
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case BIO_C_SET_FD:
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fd_free(b);
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b->num= *((int *)ptr);
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b->shutdown = (int)num;
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b->init = 1;
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break;
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case BIO_C_GET_FD:
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if (b->init) {
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ip = (int *)ptr;
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if (ip != NULL)
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*ip = b->num;
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ret = b->num;
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} else
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ret = -1;
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break;
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case BIO_CTRL_GET_CLOSE:
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ret = b->shutdown;
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break;
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case BIO_CTRL_SET_CLOSE:
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b->shutdown = (int)num;
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break;
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case BIO_CTRL_PENDING:
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case BIO_CTRL_WPENDING:
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ret = 0;
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break;
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case BIO_CTRL_DUP:
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case BIO_CTRL_FLUSH:
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ret = 1;
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break;
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default:
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ret = 0;
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break;
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}
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return (ret);
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}
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static int
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fd_puts(BIO *bp, const char *str)
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{
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int n, ret;
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n = strlen(str);
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ret = fd_write(bp, str, n);
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return (ret);
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}
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static int
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fd_gets(BIO *bp, char *buf, int size)
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{
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int ret = 0;
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char *ptr = buf;
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char *end = buf + size - 1;
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while ((ptr < end) && (fd_read(bp, ptr, 1) > 0) && (ptr[0] != '\n'))
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ptr++;
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ptr[0] = '\0';
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if (buf[0] != '\0')
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ret = strlen(buf);
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return (ret);
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}
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int
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BIO_fd_should_retry(int i)
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{
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int err;
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if ((i == 0) || (i == -1)) {
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err = errno;
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return (BIO_fd_non_fatal_error(err));
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}
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return (0);
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}
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int
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BIO_fd_non_fatal_error(int err)
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{
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switch (err) {
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case ENOTCONN:
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case EINTR:
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case EAGAIN:
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case EINPROGRESS:
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case EALREADY:
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return (1);
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default:
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break;
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}
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return (0);
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}
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