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// natVMSecureRandomPosix.cc - Native part of VMSecureRandom class for POSIX.
/* Copyright (C) 2009 Free Software Foundation
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <gcj/cni.h>
#include <java/lang/InternalError.h>
#include <gnu/java/security/jce/prng/VMSecureRandom.h>
jint
gnu::java::security::jce::prng::VMSecureRandom::natGenerateSeed(jbyteArray byte_array, jint offset, jint length)
{
int a, fd;
jbyte *bytes = elements (byte_array);
ssize_t count;
for (a = 0; a < offset; ++a)
bytes++;
fd = open ("/dev/random", O_RDONLY);
if (fd == -1)
{
jstring oserr = JvNewStringLatin1 (strerror (errno));
throw new ::java::lang::InternalError
(JvNewStringLatin1 ("Error opening /dev/random: ")->concat(oserr));
}
count = read (fd, bytes, length);
close (fd);
if (count == -1)
{
jstring oserr = JvNewStringLatin1 (strerror (errno));
throw new ::java::lang::InternalError
(JvNewStringLatin1 ("Error reading /dev/random: ")->concat(oserr));
}
return count;
}
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