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