mirror of
https://gitee.com/acl-dev/acl.git
synced 2024-12-11 01:17:35 +08:00
9697f95b8f
This reverts commit 15d999759e
.
156 lines
3.9 KiB
C
156 lines
3.9 KiB
C
/*++
|
|
* NAME
|
|
* tls_prng_dev 3
|
|
* SUMMARY
|
|
* seed OpenSSL PRNG from entropy device
|
|
* SYNOPSIS
|
|
* #include <tls_prng_src.h>
|
|
*
|
|
* TLS_PRNG_SRC *tls_prng_dev_open(name, timeout)
|
|
* const char *name;
|
|
* int timeout;
|
|
*
|
|
* ssize_t tls_prng_dev_read(dev, length)
|
|
* TLS_PRNG_SRC *dev;
|
|
* size_t length;
|
|
*
|
|
* int tls_prng_dev_close(dev)
|
|
* TLS_PRNG_SRC *dev;
|
|
* DESCRIPTION
|
|
* tls_prng_dev_open() opens the specified entropy device
|
|
* and returns a handle that should be used with all subsequent
|
|
* access.
|
|
*
|
|
* tls_prng_dev_read() reads the requested number of bytes from
|
|
* the entropy device and updates the OpenSSL PRNG.
|
|
*
|
|
* tls_prng_dev_close() closes the specified entropy device
|
|
* and releases memory that was allocated for the handle.
|
|
*
|
|
* Arguments:
|
|
* .IP name
|
|
* The pathname of the entropy device.
|
|
* .IP length
|
|
* The number of bytes to read from the entropy device.
|
|
* Request lengths will be truncated at 255 bytes.
|
|
* .IP timeout
|
|
* Time limit on individual I/O operations.
|
|
* DIAGNOSTICS
|
|
* tls_prng_dev_open() returns a null pointer on error.
|
|
*
|
|
* tls_prng_dev_read() returns -1 on error, the number
|
|
* of bytes received on success.
|
|
*
|
|
* tls_prng_dev_close() returns -1 on error, 0 on success.
|
|
*
|
|
* In all cases the errno variable indicates the type of error.
|
|
* LICENSE
|
|
* .ad
|
|
* .fi
|
|
* The Secure Mailer license must be distributed with this software.
|
|
* AUTHOR(S)
|
|
* Wietse Venema
|
|
* IBM T.J. Watson Research
|
|
* P.O. Box 704
|
|
* Yorktown Heights, NY 10598, USA
|
|
*--*/
|
|
|
|
#include "StdAfx.h"
|
|
#include <fcntl.h>
|
|
#ifdef ACL_UNIX
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <limits.h>
|
|
#include <errno.h>
|
|
|
|
#ifndef UCHAR_MAX
|
|
#define UCHAR_MAX 0xff
|
|
#endif
|
|
|
|
/* OpenSSL library. */
|
|
|
|
#ifdef USE_TLS
|
|
#include <openssl/rand.h> /* For the PRNG */
|
|
|
|
/* TLS library. */
|
|
|
|
#include "tls_prng.h"
|
|
|
|
/* tls_prng_dev_open - open entropy device */
|
|
|
|
TLS_PRNG_SRC *tls_prng_dev_open(const char *name, int timeout)
|
|
{
|
|
const char *myname = "tls_prng_dev_open";
|
|
TLS_PRNG_SRC *dev;
|
|
ACL_FILE_HANDLE fd;
|
|
|
|
if ((fd = acl_file_open(name, O_RDONLY, 0)) < 0) {
|
|
if (acl_msg_verbose)
|
|
acl_msg_info("%s: cannot open entropy device %s: %s",
|
|
myname, name, acl_last_serror());
|
|
return (0);
|
|
} else {
|
|
dev = (TLS_PRNG_SRC *) acl_mymalloc(sizeof(*dev));
|
|
dev->fd.file = fd;
|
|
dev->name = acl_mystrdup(name);
|
|
dev->timeout = timeout;
|
|
if (acl_msg_verbose)
|
|
acl_msg_info("%s: opened entropy device %s", myname, name);
|
|
return (dev);
|
|
}
|
|
}
|
|
|
|
/* tls_prng_dev_read - update internal PRNG from device */
|
|
|
|
ssize_t tls_prng_dev_read(TLS_PRNG_SRC *dev, size_t len)
|
|
{
|
|
const char *myname = "tls_prng_dev_read";
|
|
unsigned char buffer[UCHAR_MAX];
|
|
ssize_t count;
|
|
size_t rand_bytes;
|
|
|
|
if (len <= 0)
|
|
acl_msg_panic("%s: bad read length: %ld", myname, (long) len);
|
|
|
|
if (len > sizeof(buffer))
|
|
rand_bytes = sizeof(buffer);
|
|
else
|
|
rand_bytes = len;
|
|
errno = 0;
|
|
#ifdef ACL_UNIX
|
|
count = acl_timed_read(dev->fd.file, buffer, (int) rand_bytes, dev->timeout,
|
|
NULL);
|
|
#elif defined(WIN32)
|
|
count = acl_file_read(dev->fd.file, buffer, (int) rand_bytes,
|
|
dev->timeout, NULL, NULL);
|
|
#endif
|
|
if (count > 0) {
|
|
if (acl_msg_verbose)
|
|
acl_msg_info("%s: read %ld bytes from entropy device %s",
|
|
myname, (long) count, dev->name);
|
|
RAND_seed(buffer, count);
|
|
} else {
|
|
if (acl_msg_verbose)
|
|
acl_msg_info("%s: cannot read %ld bytes from entropy device %s: %s",
|
|
myname, (long) rand_bytes, dev->name, acl_last_serror());
|
|
}
|
|
return (count);
|
|
}
|
|
|
|
/* tls_prng_dev_close - disconnect from EGD server */
|
|
|
|
int tls_prng_dev_close(TLS_PRNG_SRC *dev)
|
|
{
|
|
const char *myname = "tls_prng_dev_close";
|
|
int err;
|
|
|
|
if (acl_msg_verbose)
|
|
acl_msg_info("%s: close entropy device %s", myname, dev->name);
|
|
err = acl_file_close(dev->fd.file);
|
|
acl_myfree(dev->name);
|
|
acl_myfree(dev);
|
|
return (err);
|
|
}
|
|
|
|
#endif
|