mirror of
https://github.com/signalapp/Signal-Android.git
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Support for Signal calls.
Merge in RedPhone // FREEBIE
This commit is contained in:
Moxie Marlinspike
319
jni/openssl/crypto/bio/bss_fd.c
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319
jni/openssl/crypto/bio/bss_fd.c
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/* crypto/bio/bss_fd.c */
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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 <stdio.h>
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#include <errno.h>
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#define USE_SOCKETS
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#include "cryptlib.h"
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#if defined(OPENSSL_NO_POSIX_IO)
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/*
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* One can argue that one should implement dummy placeholder for
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* BIO_s_fd here...
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*/
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#else
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/*
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* As for unconditional usage of "UPLINK" interface in this module.
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* Trouble is that unlike Unix file descriptors [which are indexes
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* in kernel-side per-process table], corresponding descriptors on
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* platforms which require "UPLINK" interface seem to be indexes
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* in a user-land, non-global table. Well, in fact they are indexes
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* in stdio _iob[], and recall that _iob[] was the very reason why
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* "UPLINK" interface was introduced in first place. But one way on
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* another. Neither libcrypto or libssl use this BIO meaning that
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* file descriptors can only be provided by application. Therefore
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* "UPLINK" calls are due...
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*/
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#include "bio_lcl.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 BIO_METHOD methods_fdp=
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{
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BIO_TYPE_FD,"file descriptor",
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fd_write,
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fd_read,
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fd_puts,
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fd_gets,
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fd_ctrl,
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fd_new,
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fd_free,
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NULL,
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};
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BIO_METHOD *BIO_s_fd(void)
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{
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return(&methods_fdp);
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}
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BIO *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) 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 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=BIO_FLAGS_UPLINK; /* essentially redundant */
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return(1);
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}
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static int fd_free(BIO *a)
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{
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if (a == NULL) return(0);
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if (a->shutdown)
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{
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if (a->init)
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{
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UP_close(a->num);
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}
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a->init=0;
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a->flags=BIO_FLAGS_UPLINK;
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}
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return(1);
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}
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static int 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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{
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clear_sys_error();
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ret=UP_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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{
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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 fd_write(BIO *b, const char *in, int inl)
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{
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int ret;
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clear_sys_error();
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ret=UP_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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{
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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 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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{
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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)UP_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)UP_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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{
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ip=(int *)ptr;
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if (ip != NULL) *ip=b->num;
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ret=b->num;
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}
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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 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 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 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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{
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err=get_last_sys_error();
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#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
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if ((i == -1) && (err == 0))
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return(1);
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#endif
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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 BIO_fd_non_fatal_error(int err)
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{
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switch (err)
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{
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#ifdef EWOULDBLOCK
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# ifdef WSAEWOULDBLOCK
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# if WSAEWOULDBLOCK != EWOULDBLOCK
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case EWOULDBLOCK:
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# endif
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# else
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case EWOULDBLOCK:
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# endif
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#endif
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#if defined(ENOTCONN)
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case ENOTCONN:
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#endif
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#ifdef EINTR
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case EINTR:
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#endif
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#ifdef EAGAIN
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#if EWOULDBLOCK != EAGAIN
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case EAGAIN:
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# endif
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#endif
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#ifdef EPROTO
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case EPROTO:
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#endif
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#ifdef EINPROGRESS
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case EINPROGRESS:
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#endif
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#ifdef EALREADY
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case EALREADY:
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#endif
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return(1);
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/* break; */
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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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#endif
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