/* $OpenBSD: bss_fd.c,v 1.21 2023/07/05 21:23:37 beck Exp $ */ /* 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 #include #include #include #include #include #include "bio_local.h" static int fd_write(BIO *h, const char *buf, int num); static int fd_read(BIO *h, char *buf, int size); static int fd_puts(BIO *h, const char *str); static int fd_gets(BIO *h, char *buf, int size); static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2); static int fd_new(BIO *h); static int fd_free(BIO *data); int BIO_fd_should_retry(int s); static const BIO_METHOD methods_fdp = { .type = BIO_TYPE_FD, .name = "file descriptor", .bwrite = fd_write, .bread = fd_read, .bputs = fd_puts, .bgets = fd_gets, .ctrl = fd_ctrl, .create = fd_new, .destroy = fd_free }; const BIO_METHOD * BIO_s_fd(void) { return (&methods_fdp); } LCRYPTO_ALIAS(BIO_s_fd); BIO * BIO_new_fd(int fd, int close_flag) { BIO *ret; ret = BIO_new(BIO_s_fd()); if (ret == NULL) return (NULL); BIO_set_fd(ret, fd, close_flag); return (ret); } LCRYPTO_ALIAS(BIO_new_fd); static int fd_new(BIO *bi) { bi->init = 0; bi->num = -1; bi->ptr = NULL; bi->flags=0; return (1); } static int fd_free(BIO *a) { if (a == NULL) return (0); if (a->shutdown) { if (a->init) { close(a->num); } a->init = 0; a->flags = 0; } return (1); } static int fd_read(BIO *b, char *out, int outl) { int ret = 0; if (out != NULL) { errno = 0; ret = read(b->num, out, outl); BIO_clear_retry_flags(b); if (ret <= 0) { if (BIO_fd_should_retry(ret)) BIO_set_retry_read(b); } } return (ret); } static int fd_write(BIO *b, const char *in, int inl) { int ret; errno = 0; ret = write(b->num, in, inl); BIO_clear_retry_flags(b); if (ret <= 0) { if (BIO_fd_should_retry(ret)) BIO_set_retry_write(b); } return (ret); } static long fd_ctrl(BIO *b, int cmd, long num, void *ptr) { long ret = 1; int *ip; switch (cmd) { case BIO_CTRL_RESET: num = 0; case BIO_C_FILE_SEEK: ret = (long)lseek(b->num, num, 0); break; case BIO_C_FILE_TELL: case BIO_CTRL_INFO: ret = (long)lseek(b->num, 0, 1); break; case BIO_C_SET_FD: fd_free(b); b->num= *((int *)ptr); b->shutdown = (int)num; b->init = 1; break; case BIO_C_GET_FD: if (b->init) { ip = (int *)ptr; if (ip != NULL) *ip = b->num; ret = b->num; } else ret = -1; break; case BIO_CTRL_GET_CLOSE: ret = b->shutdown; break; case BIO_CTRL_SET_CLOSE: b->shutdown = (int)num; break; case BIO_CTRL_PENDING: case BIO_CTRL_WPENDING: ret = 0; break; case BIO_CTRL_DUP: case BIO_CTRL_FLUSH: ret = 1; break; default: ret = 0; break; } return (ret); } static int fd_puts(BIO *bp, const char *str) { int n, ret; n = strlen(str); ret = fd_write(bp, str, n); return (ret); } static int fd_gets(BIO *bp, char *buf, int size) { int ret = 0; char *ptr = buf; char *end = buf + size - 1; while ((ptr < end) && (fd_read(bp, ptr, 1) > 0) && (ptr[0] != '\n')) ptr++; ptr[0] = '\0'; if (buf[0] != '\0') ret = strlen(buf); return (ret); } int BIO_fd_should_retry(int i) { int err; if ((i == 0) || (i == -1)) { err = errno; return (BIO_fd_non_fatal_error(err)); } return (0); } LCRYPTO_ALIAS(BIO_fd_should_retry); int BIO_fd_non_fatal_error(int err) { switch (err) { case ENOTCONN: case EINTR: case EAGAIN: case EINPROGRESS: case EALREADY: return (1); default: break; } return (0); } LCRYPTO_ALIAS(BIO_fd_non_fatal_error);