BIO *BIO_new_file(const char *filename, const char *mode)
{
BIO *ret;
FILE *file = openssl_fopen(filename, mode);
int fp_flags = BIO_CLOSE;
if (strchr(mode, 'b') == NULL)
fp_flags |= BIO_FP_TEXT;
if (file == NULL) {
SYSerr(SYS_F_FOPEN, get_last_sys_error());
ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
if (errno == ENOENT
# ifdef ENXIO
|| errno == ENXIO
# endif
)
BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE);
else
BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB);
return NULL;
}
if ((ret = BIO_new(BIO_s_file())) == NULL) {
fclose(file);
return NULL;
}
BIO_clear_flags(ret, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
* UPLINK */
BIO_set_fp(ret, file, fp_flags);
return ret;
}
int RAND_write_file(const char *file)
{
unsigned char buf[BUFSIZE];
int i, ret = 0, rand_err = 0;
FILE *out = NULL;
int n;
#ifndef OPENSSL_NO_POSIX_IO
struct stat sb;
# if defined(S_ISBLK) && defined(S_ISCHR)
# ifdef _WIN32
/*
* Check for |file| being a driver as "ASCII-safe" on Windows,
* because driver paths are always ASCII.
*/
# endif
i = stat(file, &sb);
if (i != -1) {
if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) {
/*
* this file is a device. we don't write back to it. we
* "succeed" on the assumption this is some sort of random
* device. Otherwise attempting to write to and chmod the device
* causes problems.
*/
return 1;
}
# endif
}
#endif
#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && \
!defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WINDOWS)
{
# ifndef O_BINARY
# define O_BINARY 0
# endif
/*
* chmod(..., 0600) is too late to protect the file, permissions
* should be restrictive from the start
*/
int fd = open(file, O_WRONLY | O_CREAT | O_BINARY, 0600);
if (fd != -1)
out = fdopen(fd, "wb");
}
#endif
#ifdef OPENSSL_SYS_VMS
/*
* VMS NOTE: Prior versions of this routine created a _new_ version of
* the rand file for each call into this routine, then deleted all
* existing versions named ;-1, and finally renamed the current version
* as ';1'. Under concurrent usage, this resulted in an RMS race
* condition in rename() which could orphan files (see vms message help
* for RMS$_REENT). With the fopen() calls below, openssl/VMS now shares
* the top-level version of the rand file. Note that there may still be
* conditions where the top-level rand file is locked. If so, this code
* will then create a new version of the rand file. Without the delete
* and rename code, this can result in ascending file versions that stop
* at version 32767, and this routine will then return an error. The
* remedy for this is to recode the calling application to avoid
* concurrent use of the rand file, or synchronize usage at the
* application level. Also consider whether or not you NEED a persistent
* rand file in a concurrent use situation.
*/
out = openssl_fopen(file, "rb+");
#endif
if (out == NULL)
out = openssl_fopen(file, "wb");
if (out == NULL)
goto err;
#if !defined(NO_CHMOD) && !defined(OPENSSL_NO_POSIX_IO)
chmod(file, 0600);
#endif
n = RAND_DATA;
for (;;) {
i = (n > BUFSIZE) ? BUFSIZE : n;
n -= BUFSIZE;
if (RAND_bytes(buf, i) <= 0)
rand_err = 1;
i = fwrite(buf, 1, i, out);
if (i <= 0) {
ret = 0;
break;
}
ret += i;
if (n <= 0)
break;
}
fclose(out);
OPENSSL_cleanse(buf, BUFSIZE);
err:
return (rand_err ? -1 : ret);
}
int RAND_load_file(const char *file, long bytes)
{
/*-
* If bytes >= 0, read up to 'bytes' bytes.
* if bytes == -1, read complete file.
*/
unsigned char buf[BUFSIZE];
#ifndef OPENSSL_NO_POSIX_IO
struct stat sb;
#endif
int i, ret = 0, n;
FILE *in = NULL;
if (file == NULL)
return 0;
if (bytes == 0)
return ret;
in = openssl_fopen(file, "rb");
if (in == NULL)
goto err;
#ifndef OPENSSL_NO_POSIX_IO
/*
* struct stat can have padding and unused fields that may not be
* initialized in the call to stat(). We need to clear the entire
* structure before calling RAND_add() to avoid complaints from
* applications such as Valgrind.
*/
memset(&sb, 0, sizeof(sb));
if (fstat(fileno(in), &sb) < 0)
goto err;
RAND_add(&sb, sizeof(sb), 0.0);
# if defined(S_ISBLK) && defined(S_ISCHR)
if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) {
/*
* this file is a device. we don't want read an infinite number of
* bytes from a random device, nor do we want to use buffered I/O
* because we will waste system entropy.
*/
bytes = (bytes == -1) ? 2048 : bytes; /* ok, is 2048 enough? */
setbuf(in, NULL); /* don't do buffered reads */
}
# endif
#endif
for (;;) {
if (bytes > 0)
n = (bytes < BUFSIZE) ? (int)bytes : BUFSIZE;
else
n = BUFSIZE;
i = fread(buf, 1, n, in);
if (i <= 0)
break;
RAND_add(buf, i, (double)i);
ret += i;
if (bytes > 0) {
bytes -= n;
if (bytes <= 0)
break;
}
}
OPENSSL_cleanse(buf, BUFSIZE);
err:
if (in != NULL)
fclose(in);
return ret;
}
static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
{
long ret = 1;
FILE *fp = (FILE *)b->ptr;
FILE **fpp;
char p[4];
int st;
switch (cmd) {
case BIO_C_FILE_SEEK:
case BIO_CTRL_RESET:
if (b->flags & BIO_FLAGS_UPLINK)
ret = (long)UP_fseek(b->ptr, num, 0);
else
ret = (long)fseek(fp, num, 0);
break;
case BIO_CTRL_EOF:
if (b->flags & BIO_FLAGS_UPLINK)
ret = (long)UP_feof(fp);
else
ret = (long)feof(fp);
break;
case BIO_C_FILE_TELL:
case BIO_CTRL_INFO:
if (b->flags & BIO_FLAGS_UPLINK)
ret = UP_ftell(b->ptr);
else
ret = ftell(fp);
break;
case BIO_C_SET_FILE_PTR:
file_free(b);
b->shutdown = (int)num & BIO_CLOSE;
b->ptr = ptr;
b->init = 1;
# if BIO_FLAGS_UPLINK!=0
# if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
# define _IOB_ENTRIES 20
# endif
/* Safety net to catch purely internal BIO_set_fp calls */
# if defined(_MSC_VER) && _MSC_VER>=1900
if (ptr == stdin || ptr == stdout || ptr == stderr)
BIO_clear_flags(b, BIO_FLAGS_UPLINK);
# elif defined(_IOB_ENTRIES)
if ((size_t)ptr >= (size_t)stdin &&
(size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
BIO_clear_flags(b, BIO_FLAGS_UPLINK);
# endif
# endif
# ifdef UP_fsetmod
if (b->flags & BIO_FLAGS_UPLINK)
UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
else
# endif
{
# if defined(OPENSSL_SYS_WINDOWS)
int fd = _fileno((FILE *)ptr);
if (num & BIO_FP_TEXT)
_setmode(fd, _O_TEXT);
else
_setmode(fd, _O_BINARY);
# elif defined(OPENSSL_SYS_MSDOS)
int fd = fileno((FILE *)ptr);
/* Set correct text/binary mode */
if (num & BIO_FP_TEXT)
_setmode(fd, _O_TEXT);
/* Dangerous to set stdin/stdout to raw (unless redirected) */
else {
if (fd == STDIN_FILENO || fd == STDOUT_FILENO) {
if (isatty(fd) <= 0)
_setmode(fd, _O_BINARY);
} else
_setmode(fd, _O_BINARY);
}
# elif defined(OPENSSL_SYS_WIN32_CYGWIN)
int fd = fileno((FILE *)ptr);
if (!(num & BIO_FP_TEXT))
setmode(fd, O_BINARY);
# endif
}
break;
case BIO_C_SET_FILENAME:
file_free(b);
b->shutdown = (int)num & BIO_CLOSE;
if (num & BIO_FP_APPEND) {
if (num & BIO_FP_READ)
OPENSSL_strlcpy(p, "a+", sizeof(p));
else
OPENSSL_strlcpy(p, "a", sizeof(p));
} else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
OPENSSL_strlcpy(p, "r+", sizeof(p));
else if (num & BIO_FP_WRITE)
OPENSSL_strlcpy(p, "w", sizeof(p));
else if (num & BIO_FP_READ)
OPENSSL_strlcpy(p, "r", sizeof(p));
else {
BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE);
ret = 0;
break;
}
# if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS)
if (!(num & BIO_FP_TEXT))
OPENSSL_strlcat(p, "b", sizeof(p));
else
OPENSSL_strlcat(p, "t", sizeof(p));
# elif defined(OPENSSL_SYS_WIN32_CYGWIN)
if (!(num & BIO_FP_TEXT))
OPENSSL_strlcat(p, "b", sizeof(p));
# endif
fp = openssl_fopen(ptr, p);
if (fp == NULL) {
SYSerr(SYS_F_FOPEN, get_last_sys_error());
ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
ret = 0;
break;
}
b->ptr = fp;
b->init = 1;
BIO_clear_flags(b, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
* UPLINK */
break;
case BIO_C_GET_FILE_PTR:
/* the ptr parameter is actually a FILE ** in this case. */
if (ptr != NULL) {
fpp = (FILE **)ptr;
*fpp = (FILE *)b->ptr;
}
break;
case BIO_CTRL_GET_CLOSE:
ret = (long)b->shutdown;
break;
case BIO_CTRL_SET_CLOSE:
b->shutdown = (int)num;
break;
case BIO_CTRL_FLUSH:
st = b->flags & BIO_FLAGS_UPLINK
? UP_fflush(b->ptr) : fflush((FILE *)b->ptr);
if (st == EOF) {
SYSerr(SYS_F_FFLUSH, get_last_sys_error());
ERR_add_error_data(1, "fflush()");
BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
ret = 0;
}
break;
case BIO_CTRL_DUP:
ret = 1;
break;
case BIO_CTRL_WPENDING:
case BIO_CTRL_PENDING:
case BIO_CTRL_PUSH:
case BIO_CTRL_POP:
default:
ret = 0;
break;
}
return ret;
}
