diff options
| author | Jeff Cody <jcody@redhat.com> | 2013-04-29 14:48:16 -0400 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-05-03 10:31:58 +0200 |
| commit | 8e1b02b8ef2eefcb2ff3855531d7bc2ea71e1fb4 (patch) | |
| tree | 7d148ba86aaf7485263483521c7259042346799c /include | |
| parent | 8ca27ce2e1150486ea2db4116a03706b28294f16 (diff) | |
qemu: add castagnoli crc32c checksum algorithm
This adds the Castagnoli CRC32C algorithm, using the 0x11EDC6F41
polynomial.
This is extracted from the linux kernel cryptographic crc32.c module.
The algorithm is based on:
Castagnoli93: Guy Castagnoli and Stefan Braeuer and Martin Herrman
"Optimization of Cyclic Redundancy-Check Codes with 24
and 32 Parity Bits", IEEE Transactions on Communication,
Volume 41, Number 6, June 1993
Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/qemu/crc32c.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/qemu/crc32c.h b/include/qemu/crc32c.h new file mode 100644 index 0000000000..56d1c3bfde --- /dev/null +++ b/include/qemu/crc32c.h @@ -0,0 +1,35 @@ +/* + * Castagnoli CRC32C Checksum Algorithm + * + * Polynomial: 0x11EDC6F41 + * + * Castagnoli93: Guy Castagnoli and Stefan Braeuer and Martin Herrman + * "Optimization of Cyclic Redundancy-Check Codes with 24 + * and 32 Parity Bits",IEEE Transactions on Communication, + * Volume 41, Number 6, June 1993 + * + * Copyright (c) 2013 Red Hat, Inc., + * + * Authors: + * Jeff Cody <jcody@redhat.com> + * + * Based on the Linux kernel cryptographic crc32c module, + * + * Copyright (c) 2004 Cisco Systems, Inc. + * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#ifndef QEMU_CRC32_H +#define QEMU_CRC32_H + +#include "qemu-common.h" + +uint32_t crc32c(uint32_t crc, const uint8_t *data, unsigned int length); + +#endif |