415 lines
11 KiB
C
415 lines
11 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*-
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* 03-Dec-1997 rdenny@dc3.com Fix bug preventing use of stdin/stdout
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* with binary data (e.g. asn1parse -inform DER < xxx) under
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* Windows
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*/
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#ifndef HEADER_BSS_FILE_C
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# define HEADER_BSS_FILE_C
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# if defined(__linux) || defined(__sun) || defined(__hpux)
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/*
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* Following definition aliases fopen to fopen64 on above mentioned
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* platforms. This makes it possible to open and sequentially access files
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* larger than 2GB from 32-bit application. It does not allow to traverse
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* them beyond 2GB with fseek/ftell, but on the other hand *no* 32-bit
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* platform permits that, not with fseek/ftell. Not to mention that breaking
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* 2GB limit for seeking would require surgery to *our* API. But sequential
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* access suffices for practical cases when you can run into large files,
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* such as fingerprinting, so we can let API alone. For reference, the list
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* of 32-bit platforms which allow for sequential access of large files
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* without extra "magic" comprise *BSD, Darwin, IRIX...
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*/
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# ifndef _FILE_OFFSET_BITS
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# define _FILE_OFFSET_BITS 64
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# endif
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# endif
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# include <stdio.h>
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# include <errno.h>
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# include "bio_lcl.h"
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# include <openssl/err.h>
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# if !defined(OPENSSL_NO_STDIO)
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static int file_write(BIO *h, const char *buf, int num);
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static int file_read(BIO *h, char *buf, int size);
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static int file_puts(BIO *h, const char *str);
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static int file_gets(BIO *h, char *str, int size);
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static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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static int file_new(BIO *h);
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static int file_free(BIO *data);
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static const BIO_METHOD methods_filep = {
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BIO_TYPE_FILE,
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"FILE pointer",
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file_write,
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file_read,
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file_puts,
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file_gets,
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file_ctrl,
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file_new,
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file_free,
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NULL,
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};
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BIO *BIO_new_file(const char *filename, const char *mode)
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{
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BIO *ret;
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FILE *file = openssl_fopen(filename, mode);
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int fp_flags = BIO_CLOSE;
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if (strchr(mode, 'b') == NULL)
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fp_flags |= BIO_FP_TEXT;
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if (file == NULL) {
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SYSerr(SYS_F_FOPEN, get_last_sys_error());
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ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
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if (errno == ENOENT)
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BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE);
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else
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BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB);
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return (NULL);
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}
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if ((ret = BIO_new(BIO_s_file())) == NULL) {
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fclose(file);
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return (NULL);
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}
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BIO_clear_flags(ret, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
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* UPLINK */
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BIO_set_fp(ret, file, fp_flags);
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return (ret);
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}
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BIO *BIO_new_fp(FILE *stream, int close_flag)
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{
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BIO *ret;
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if ((ret = BIO_new(BIO_s_file())) == NULL)
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return (NULL);
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/* redundant flag, left for documentation purposes */
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BIO_set_flags(ret, BIO_FLAGS_UPLINK);
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BIO_set_fp(ret, stream, close_flag);
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return (ret);
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}
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const BIO_METHOD *BIO_s_file(void)
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{
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return (&methods_filep);
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}
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static int file_new(BIO *bi)
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{
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bi->init = 0;
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bi->num = 0;
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bi->ptr = NULL;
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bi->flags = BIO_FLAGS_UPLINK; /* default to UPLINK */
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return (1);
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}
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static int file_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) && (a->ptr != NULL)) {
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if (a->flags & BIO_FLAGS_UPLINK)
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UP_fclose(a->ptr);
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else
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fclose(a->ptr);
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a->ptr = NULL;
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a->flags = BIO_FLAGS_UPLINK;
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}
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a->init = 0;
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}
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return (1);
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}
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static int file_read(BIO *b, char *out, int outl)
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{
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int ret = 0;
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if (b->init && (out != NULL)) {
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if (b->flags & BIO_FLAGS_UPLINK)
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ret = UP_fread(out, 1, (int)outl, b->ptr);
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else
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ret = fread(out, 1, (int)outl, (FILE *)b->ptr);
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if (ret == 0
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&& (b->flags & BIO_FLAGS_UPLINK) ? UP_ferror((FILE *)b->ptr) :
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ferror((FILE *)b->ptr)) {
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SYSerr(SYS_F_FREAD, get_last_sys_error());
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BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB);
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ret = -1;
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}
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}
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return (ret);
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}
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static int file_write(BIO *b, const char *in, int inl)
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{
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int ret = 0;
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if (b->init && (in != NULL)) {
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if (b->flags & BIO_FLAGS_UPLINK)
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ret = UP_fwrite(in, (int)inl, 1, b->ptr);
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else
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ret = fwrite(in, (int)inl, 1, (FILE *)b->ptr);
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if (ret)
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ret = inl;
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/* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
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/*
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* according to Tim Hudson <tjh@cryptsoft.com>, the commented out
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* version above can cause 'inl' write calls under some stupid stdio
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* implementations (VMS)
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*/
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}
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return (ret);
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}
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static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
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{
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long ret = 1;
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FILE *fp = (FILE *)b->ptr;
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FILE **fpp;
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char p[4];
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switch (cmd) {
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case BIO_C_FILE_SEEK:
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case BIO_CTRL_RESET:
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if (b->flags & BIO_FLAGS_UPLINK)
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ret = (long)UP_fseek(b->ptr, num, 0);
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else
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ret = (long)fseek(fp, num, 0);
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break;
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case BIO_CTRL_EOF:
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if (b->flags & BIO_FLAGS_UPLINK)
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ret = (long)UP_feof(fp);
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else
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ret = (long)feof(fp);
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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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if (b->flags & BIO_FLAGS_UPLINK)
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ret = UP_ftell(b->ptr);
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else
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ret = ftell(fp);
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break;
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case BIO_C_SET_FILE_PTR:
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file_free(b);
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b->shutdown = (int)num & BIO_CLOSE;
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b->ptr = ptr;
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b->init = 1;
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# if BIO_FLAGS_UPLINK!=0
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# if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
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# define _IOB_ENTRIES 20
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# endif
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/* Safety net to catch purely internal BIO_set_fp calls */
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# if defined(_MSC_VER) && _MSC_VER>=1900
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if (ptr == stdin || ptr == stdout || ptr == stderr)
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BIO_clear_flags(b, BIO_FLAGS_UPLINK);
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# elif defined(_IOB_ENTRIES)
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if ((size_t)ptr >= (size_t)stdin &&
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(size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
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BIO_clear_flags(b, BIO_FLAGS_UPLINK);
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# endif
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# endif
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# ifdef UP_fsetmod
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if (b->flags & BIO_FLAGS_UPLINK)
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UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
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else
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# endif
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{
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# if defined(OPENSSL_SYS_WINDOWS)
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int fd = _fileno((FILE *)ptr);
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if (num & BIO_FP_TEXT)
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_setmode(fd, _O_TEXT);
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else
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_setmode(fd, _O_BINARY);
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# elif defined(OPENSSL_SYS_MSDOS)
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int fd = fileno((FILE *)ptr);
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/* Set correct text/binary mode */
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if (num & BIO_FP_TEXT)
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_setmode(fd, _O_TEXT);
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/* Dangerous to set stdin/stdout to raw (unless redirected) */
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else {
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if (fd == STDIN_FILENO || fd == STDOUT_FILENO) {
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if (isatty(fd) <= 0)
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_setmode(fd, _O_BINARY);
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} else
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_setmode(fd, _O_BINARY);
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}
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# elif defined(OPENSSL_SYS_WIN32_CYGWIN)
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int fd = fileno((FILE *)ptr);
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if (num & BIO_FP_TEXT)
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setmode(fd, O_TEXT);
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else
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setmode(fd, O_BINARY);
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# endif
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}
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break;
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case BIO_C_SET_FILENAME:
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file_free(b);
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b->shutdown = (int)num & BIO_CLOSE;
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if (num & BIO_FP_APPEND) {
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if (num & BIO_FP_READ)
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OPENSSL_strlcpy(p, "a+", sizeof p);
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else
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OPENSSL_strlcpy(p, "a", sizeof p);
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} else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
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OPENSSL_strlcpy(p, "r+", sizeof p);
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else if (num & BIO_FP_WRITE)
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OPENSSL_strlcpy(p, "w", sizeof p);
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else if (num & BIO_FP_READ)
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OPENSSL_strlcpy(p, "r", sizeof p);
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else {
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BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE);
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ret = 0;
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break;
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}
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# if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32_CYGWIN)
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if (!(num & BIO_FP_TEXT))
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strcat(p, "b");
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else
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strcat(p, "t");
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# endif
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fp = openssl_fopen(ptr, p);
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if (fp == NULL) {
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SYSerr(SYS_F_FOPEN, get_last_sys_error());
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ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
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BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
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ret = 0;
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break;
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}
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b->ptr = fp;
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b->init = 1;
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BIO_clear_flags(b, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
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* UPLINK */
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break;
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case BIO_C_GET_FILE_PTR:
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/* the ptr parameter is actually a FILE ** in this case. */
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if (ptr != NULL) {
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fpp = (FILE **)ptr;
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*fpp = (FILE *)b->ptr;
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}
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break;
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case BIO_CTRL_GET_CLOSE:
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ret = (long)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_FLUSH:
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if (b->flags & BIO_FLAGS_UPLINK)
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UP_fflush(b->ptr);
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else
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fflush((FILE *)b->ptr);
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break;
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case BIO_CTRL_DUP:
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ret = 1;
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break;
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case BIO_CTRL_WPENDING:
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case BIO_CTRL_PENDING:
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case BIO_CTRL_PUSH:
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case BIO_CTRL_POP:
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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 file_gets(BIO *bp, char *buf, int size)
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{
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int ret = 0;
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buf[0] = '\0';
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if (bp->flags & BIO_FLAGS_UPLINK) {
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if (!UP_fgets(buf, size, bp->ptr))
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goto err;
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} else {
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if (!fgets(buf, size, (FILE *)bp->ptr))
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goto err;
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}
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if (buf[0] != '\0')
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ret = strlen(buf);
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err:
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return (ret);
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}
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static int file_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 = file_write(bp, str, n);
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return (ret);
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}
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#else
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static int file_write(BIO *b, const char *in, int inl)
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{
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return -1;
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}
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static int file_read(BIO *b, char *out, int outl)
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{
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return -1;
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}
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static int file_puts(BIO *bp, const char *str)
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{
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return -1;
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}
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static int file_gets(BIO *bp, char *buf, int size)
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{
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return 0;
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}
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static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
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{
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return 0;
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}
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static int file_new(BIO *bi)
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{
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return 0;
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}
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static int file_free(BIO *a)
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{
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return 0;
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}
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static const BIO_METHOD methods_filep = {
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BIO_TYPE_FILE,
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"FILE pointer",
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file_write,
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file_read,
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file_puts,
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file_gets,
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file_ctrl,
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file_new,
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file_free,
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NULL,
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};
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const BIO_METHOD *BIO_s_file(void)
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{
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return (&methods_filep);
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}
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BIO *BIO_new_file(const char *filename, const char *mode)
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{
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return NULL;
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}
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# endif /* OPENSSL_NO_STDIO */
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#endif /* HEADER_BSS_FILE_C */
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