| 1 | /*
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| 2 | * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #if defined(__linux) || defined(__sun) || defined(__hpux)
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| 11 | /*
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| 12 | * Following definition aliases fopen to fopen64 on above mentioned
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| 13 | * platforms. This makes it possible to open and sequentially access files
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| 14 | * larger than 2GB from 32-bit application. It does not allow to traverse
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| 15 | * them beyond 2GB with fseek/ftell, but on the other hand *no* 32-bit
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| 16 | * platform permits that, not with fseek/ftell. Not to mention that breaking
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| 17 | * 2GB limit for seeking would require surgery to *our* API. But sequential
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| 18 | * access suffices for practical cases when you can run into large files,
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| 19 | * such as fingerprinting, so we can let API alone. For reference, the list
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| 20 | * of 32-bit platforms which allow for sequential access of large files
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| 21 | * without extra "magic" comprise *BSD, Darwin, IRIX...
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| 22 | */
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| 23 | # ifndef _FILE_OFFSET_BITS
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| 24 | # define _FILE_OFFSET_BITS 64
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| 25 | # endif
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| 26 | #endif
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| 27 |
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| 28 | #include <stdio.h>
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| 29 | #include <errno.h>
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| 30 | #include "bio_local.h"
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| 31 | #include <openssl/err.h>
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| 32 |
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| 33 | #if !defined(OPENSSL_NO_STDIO)
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| 34 |
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| 35 | static int file_write(BIO *h, const char *buf, int num);
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| 36 | static int file_read(BIO *h, char *buf, int size);
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| 37 | static int file_puts(BIO *h, const char *str);
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| 38 | static int file_gets(BIO *h, char *str, int size);
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| 39 | static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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| 40 | static int file_new(BIO *h);
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| 41 | static int file_free(BIO *data);
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| 42 | static const BIO_METHOD methods_filep = {
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| 43 | BIO_TYPE_FILE,
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| 44 | "FILE pointer",
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| 45 | /* TODO: Convert to new style write function */
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| 46 | bwrite_conv,
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| 47 | file_write,
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| 48 | /* TODO: Convert to new style read function */
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| 49 | bread_conv,
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| 50 | file_read,
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| 51 | file_puts,
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| 52 | file_gets,
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| 53 | file_ctrl,
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| 54 | file_new,
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| 55 | file_free,
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| 56 | NULL, /* file_callback_ctrl */
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| 57 | };
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| 58 |
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| 59 | BIO *BIO_new_file(const char *filename, const char *mode)
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| 60 | {
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| 61 | BIO *ret;
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| 62 | FILE *file = openssl_fopen(filename, mode);
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| 63 | int fp_flags = BIO_CLOSE;
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| 64 |
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| 65 | if (strchr(mode, 'b') == NULL)
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| 66 | fp_flags |= BIO_FP_TEXT;
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| 67 |
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| 68 | if (file == NULL) {
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| 69 | SYSerr(SYS_F_FOPEN, get_last_sys_error());
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| 70 | ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
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| 71 | if (errno == ENOENT
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| 72 | #ifdef ENXIO
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| 73 | || errno == ENXIO
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| 74 | #endif
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| 75 | )
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| 76 | BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE);
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| 77 | else
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| 78 | BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB);
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| 79 | return NULL;
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| 80 | }
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| 81 | if ((ret = BIO_new(BIO_s_file())) == NULL) {
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| 82 | fclose(file);
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| 83 | return NULL;
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| 84 | }
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| 85 |
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| 86 | BIO_clear_flags(ret, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
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| 87 | * UPLINK */
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| 88 | BIO_set_fp(ret, file, fp_flags);
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| 89 | return ret;
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| 90 | }
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| 91 |
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| 92 | BIO *BIO_new_fp(FILE *stream, int close_flag)
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| 93 | {
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| 94 | BIO *ret;
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| 95 |
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| 96 | if ((ret = BIO_new(BIO_s_file())) == NULL)
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| 97 | return NULL;
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| 98 |
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| 99 | /* redundant flag, left for documentation purposes */
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| 100 | BIO_set_flags(ret, BIO_FLAGS_UPLINK);
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| 101 | BIO_set_fp(ret, stream, close_flag);
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| 102 | return ret;
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| 103 | }
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| 104 |
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| 105 | const BIO_METHOD *BIO_s_file(void)
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| 106 | {
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| 107 | return &methods_filep;
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| 108 | }
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| 109 |
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| 110 | static int file_new(BIO *bi)
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| 111 | {
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| 112 | bi->init = 0;
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| 113 | bi->num = 0;
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| 114 | bi->ptr = NULL;
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| 115 | bi->flags = BIO_FLAGS_UPLINK; /* default to UPLINK */
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| 116 | return 1;
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| 117 | }
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| 118 |
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| 119 | static int file_free(BIO *a)
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| 120 | {
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| 121 | if (a == NULL)
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| 122 | return 0;
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| 123 | if (a->shutdown) {
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| 124 | if ((a->init) && (a->ptr != NULL)) {
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| 125 | if (a->flags & BIO_FLAGS_UPLINK)
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| 126 | UP_fclose(a->ptr);
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| 127 | else
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| 128 | fclose(a->ptr);
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| 129 | a->ptr = NULL;
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| 130 | a->flags = BIO_FLAGS_UPLINK;
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| 131 | }
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| 132 | a->init = 0;
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| 133 | }
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| 134 | return 1;
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| 135 | }
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| 136 |
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| 137 | static int file_read(BIO *b, char *out, int outl)
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| 138 | {
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| 139 | int ret = 0;
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| 140 |
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| 141 | if (b->init && (out != NULL)) {
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| 142 | if (b->flags & BIO_FLAGS_UPLINK)
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| 143 | ret = UP_fread(out, 1, (int)outl, b->ptr);
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| 144 | else
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| 145 | ret = fread(out, 1, (int)outl, (FILE *)b->ptr);
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| 146 | if (ret == 0
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| 147 | && (b->flags & BIO_FLAGS_UPLINK) ? UP_ferror((FILE *)b->ptr) :
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| 148 | ferror((FILE *)b->ptr)) {
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| 149 | SYSerr(SYS_F_FREAD, get_last_sys_error());
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| 150 | BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB);
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| 151 | ret = -1;
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| 152 | }
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| 153 | }
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| 154 | return ret;
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| 155 | }
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| 156 |
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| 157 | static int file_write(BIO *b, const char *in, int inl)
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| 158 | {
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| 159 | int ret = 0;
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| 160 |
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| 161 | if (b->init && (in != NULL)) {
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| 162 | if (b->flags & BIO_FLAGS_UPLINK)
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| 163 | ret = UP_fwrite(in, (int)inl, 1, b->ptr);
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| 164 | else
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| 165 | ret = fwrite(in, (int)inl, 1, (FILE *)b->ptr);
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| 166 | if (ret)
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| 167 | ret = inl;
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| 168 | /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
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| 169 | /*
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| 170 | * according to Tim Hudson <[email protected]>, the commented out
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| 171 | * version above can cause 'inl' write calls under some stupid stdio
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| 172 | * implementations (VMS)
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| 173 | */
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| 174 | }
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| 175 | return ret;
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| 176 | }
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| 177 |
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| 178 | static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
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| 179 | {
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| 180 | long ret = 1;
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| 181 | FILE *fp = (FILE *)b->ptr;
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| 182 | FILE **fpp;
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| 183 | char p[4];
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| 184 | int st;
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| 185 |
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| 186 | switch (cmd) {
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| 187 | case BIO_C_FILE_SEEK:
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| 188 | case BIO_CTRL_RESET:
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| 189 | if (b->flags & BIO_FLAGS_UPLINK)
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| 190 | ret = (long)UP_fseek(b->ptr, num, 0);
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| 191 | else
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| 192 | ret = (long)fseek(fp, num, 0);
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| 193 | break;
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| 194 | case BIO_CTRL_EOF:
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| 195 | if (b->flags & BIO_FLAGS_UPLINK)
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| 196 | ret = (long)UP_feof(fp);
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| 197 | else
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| 198 | ret = (long)feof(fp);
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| 199 | break;
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| 200 | case BIO_C_FILE_TELL:
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| 201 | case BIO_CTRL_INFO:
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| 202 | if (b->flags & BIO_FLAGS_UPLINK)
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| 203 | ret = UP_ftell(b->ptr);
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| 204 | else
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| 205 | ret = ftell(fp);
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| 206 | break;
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| 207 | case BIO_C_SET_FILE_PTR:
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| 208 | file_free(b);
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| 209 | b->shutdown = (int)num & BIO_CLOSE;
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| 210 | b->ptr = ptr;
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| 211 | b->init = 1;
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| 212 | # if BIO_FLAGS_UPLINK!=0
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| 213 | # if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
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| 214 | # define _IOB_ENTRIES 20
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| 215 | # endif
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| 216 | /* Safety net to catch purely internal BIO_set_fp calls */
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| 217 | # if defined(_MSC_VER) && _MSC_VER>=1900
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| 218 | if (ptr == stdin || ptr == stdout || ptr == stderr)
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| 219 | BIO_clear_flags(b, BIO_FLAGS_UPLINK);
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| 220 | # elif defined(_IOB_ENTRIES)
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| 221 | if ((size_t)ptr >= (size_t)stdin &&
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| 222 | (size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
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| 223 | BIO_clear_flags(b, BIO_FLAGS_UPLINK);
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| 224 | # endif
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| 225 | # endif
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| 226 | # ifdef UP_fsetmod
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| 227 | if (b->flags & BIO_FLAGS_UPLINK)
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| 228 | UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
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| 229 | else
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| 230 | # endif
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| 231 | {
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| 232 | # if defined(OPENSSL_SYS_WINDOWS)
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| 233 | int fd = _fileno((FILE *)ptr);
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| 234 | if (num & BIO_FP_TEXT)
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| 235 | _setmode(fd, _O_TEXT);
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| 236 | else
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| 237 | _setmode(fd, _O_BINARY);
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| 238 | # elif defined(OPENSSL_SYS_MSDOS)
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| 239 | int fd = fileno((FILE *)ptr);
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| 240 | /* Set correct text/binary mode */
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| 241 | if (num & BIO_FP_TEXT)
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| 242 | _setmode(fd, _O_TEXT);
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| 243 | /* Dangerous to set stdin/stdout to raw (unless redirected) */
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| 244 | else {
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| 245 | if (fd == STDIN_FILENO || fd == STDOUT_FILENO) {
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| 246 | if (isatty(fd) <= 0)
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| 247 | _setmode(fd, _O_BINARY);
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| 248 | } else
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| 249 | _setmode(fd, _O_BINARY);
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| 250 | }
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| 251 | # elif defined(OPENSSL_SYS_WIN32_CYGWIN)
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| 252 | int fd = fileno((FILE *)ptr);
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| 253 | if (!(num & BIO_FP_TEXT))
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| 254 | setmode(fd, O_BINARY);
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| 255 | # endif
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| 256 | }
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| 257 | break;
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| 258 | case BIO_C_SET_FILENAME:
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| 259 | file_free(b);
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| 260 | b->shutdown = (int)num & BIO_CLOSE;
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| 261 | if (num & BIO_FP_APPEND) {
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| 262 | if (num & BIO_FP_READ)
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| 263 | OPENSSL_strlcpy(p, "a+", sizeof(p));
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| 264 | else
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| 265 | OPENSSL_strlcpy(p, "a", sizeof(p));
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| 266 | } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
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| 267 | OPENSSL_strlcpy(p, "r+", sizeof(p));
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| 268 | else if (num & BIO_FP_WRITE)
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| 269 | OPENSSL_strlcpy(p, "w", sizeof(p));
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| 270 | else if (num & BIO_FP_READ)
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| 271 | OPENSSL_strlcpy(p, "r", sizeof(p));
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| 272 | else {
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| 273 | BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE);
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| 274 | ret = 0;
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| 275 | break;
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| 276 | }
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| 277 | # if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS)
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| 278 | if (!(num & BIO_FP_TEXT))
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| 279 | OPENSSL_strlcat(p, "b", sizeof(p));
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| 280 | else
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| 281 | OPENSSL_strlcat(p, "t", sizeof(p));
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| 282 | # elif defined(OPENSSL_SYS_WIN32_CYGWIN)
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| 283 | if (!(num & BIO_FP_TEXT))
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| 284 | OPENSSL_strlcat(p, "b", sizeof(p));
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| 285 | # endif
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| 286 | fp = openssl_fopen(ptr, p);
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| 287 | if (fp == NULL) {
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| 288 | SYSerr(SYS_F_FOPEN, get_last_sys_error());
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| 289 | ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
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| 290 | BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
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| 291 | ret = 0;
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| 292 | break;
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| 293 | }
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| 294 | b->ptr = fp;
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| 295 | b->init = 1;
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| 296 | BIO_clear_flags(b, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
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| 297 | * UPLINK */
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| 298 | break;
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| 299 | case BIO_C_GET_FILE_PTR:
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| 300 | /* the ptr parameter is actually a FILE ** in this case. */
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| 301 | if (ptr != NULL) {
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| 302 | fpp = (FILE **)ptr;
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| 303 | *fpp = (FILE *)b->ptr;
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| 304 | }
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| 305 | break;
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| 306 | case BIO_CTRL_GET_CLOSE:
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| 307 | ret = (long)b->shutdown;
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| 308 | break;
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| 309 | case BIO_CTRL_SET_CLOSE:
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| 310 | b->shutdown = (int)num;
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| 311 | break;
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| 312 | case BIO_CTRL_FLUSH:
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| 313 | st = b->flags & BIO_FLAGS_UPLINK
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| 314 | ? UP_fflush(b->ptr) : fflush((FILE *)b->ptr);
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| 315 | if (st == EOF) {
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| 316 | SYSerr(SYS_F_FFLUSH, get_last_sys_error());
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| 317 | ERR_add_error_data(1, "fflush()");
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| 318 | BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
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| 319 | ret = 0;
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| 320 | }
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| 321 | break;
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| 322 | case BIO_CTRL_DUP:
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| 323 | ret = 1;
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| 324 | break;
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| 325 |
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| 326 | case BIO_CTRL_WPENDING:
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| 327 | case BIO_CTRL_PENDING:
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| 328 | case BIO_CTRL_PUSH:
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| 329 | case BIO_CTRL_POP:
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| 330 | default:
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| 331 | ret = 0;
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| 332 | break;
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| 333 | }
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| 334 | return ret;
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| 335 | }
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| 336 |
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| 337 | static int file_gets(BIO *bp, char *buf, int size)
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| 338 | {
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| 339 | int ret = 0;
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| 340 |
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| 341 | buf[0] = '\0';
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| 342 | if (bp->flags & BIO_FLAGS_UPLINK) {
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| 343 | if (!UP_fgets(buf, size, bp->ptr))
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| 344 | goto err;
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| 345 | } else {
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| 346 | if (!fgets(buf, size, (FILE *)bp->ptr))
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| 347 | goto err;
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| 348 | }
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| 349 | if (buf[0] != '\0')
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| 350 | ret = strlen(buf);
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| 351 | err:
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| 352 | return ret;
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| 353 | }
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| 354 |
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| 355 | static int file_puts(BIO *bp, const char *str)
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| 356 | {
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| 357 | int n, ret;
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| 358 |
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| 359 | n = strlen(str);
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| 360 | ret = file_write(bp, str, n);
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| 361 | return ret;
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| 362 | }
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| 363 |
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| 364 | #else
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| 365 |
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| 366 | static int file_write(BIO *b, const char *in, int inl)
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| 367 | {
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| 368 | return -1;
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| 369 | }
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| 370 | static int file_read(BIO *b, char *out, int outl)
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| 371 | {
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| 372 | return -1;
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| 373 | }
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| 374 | static int file_puts(BIO *bp, const char *str)
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| 375 | {
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| 376 | return -1;
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| 377 | }
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| 378 | static int file_gets(BIO *bp, char *buf, int size)
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| 379 | {
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| 380 | return 0;
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| 381 | }
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| 382 | static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
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|---|
| 383 | {
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| 384 | return 0;
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| 385 | }
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| 386 | static int file_new(BIO *bi)
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|---|
| 387 | {
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| 388 | return 0;
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|---|
| 389 | }
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|---|
| 390 | static int file_free(BIO *a)
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|---|
| 391 | {
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| 392 | return 0;
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| 393 | }
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| 394 |
|
|---|
| 395 | static const BIO_METHOD methods_filep = {
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|---|
| 396 | BIO_TYPE_FILE,
|
|---|
| 397 | "FILE pointer",
|
|---|
| 398 | /* TODO: Convert to new style write function */
|
|---|
| 399 | bwrite_conv,
|
|---|
| 400 | file_write,
|
|---|
| 401 | /* TODO: Convert to new style read function */
|
|---|
| 402 | bread_conv,
|
|---|
| 403 | file_read,
|
|---|
| 404 | file_puts,
|
|---|
| 405 | file_gets,
|
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| 406 | file_ctrl,
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| 407 | file_new,
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| 408 | file_free,
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| 409 | NULL, /* file_callback_ctrl */
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|---|
| 410 | };
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|---|
| 411 |
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| 412 | const BIO_METHOD *BIO_s_file(void)
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| 413 | {
|
|---|
| 414 | return &methods_filep;
|
|---|
| 415 | }
|
|---|
| 416 |
|
|---|
| 417 | BIO *BIO_new_file(const char *filename, const char *mode)
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| 418 | {
|
|---|
| 419 | return NULL;
|
|---|
| 420 | }
|
|---|
| 421 |
|
|---|
| 422 | #endif /* OPENSSL_NO_STDIO */
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|---|
