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- // SPDX-License-Identifier: GPL-2.0-only
- #include <linux/crc64.h>
- #include <linux/module.h>
- #include <crypto/internal/hash.h>
- #include <asm/unaligned.h>
- static int chksum_init(struct shash_desc *desc)
- {
- u64 *crc = shash_desc_ctx(desc);
- *crc = 0;
- return 0;
- }
- static int chksum_update(struct shash_desc *desc, const u8 *data,
- unsigned int length)
- {
- u64 *crc = shash_desc_ctx(desc);
- *crc = crc64_rocksoft_generic(*crc, data, length);
- return 0;
- }
- static int chksum_final(struct shash_desc *desc, u8 *out)
- {
- u64 *crc = shash_desc_ctx(desc);
- put_unaligned_le64(*crc, out);
- return 0;
- }
- static int __chksum_finup(u64 crc, const u8 *data, unsigned int len, u8 *out)
- {
- crc = crc64_rocksoft_generic(crc, data, len);
- put_unaligned_le64(crc, out);
- return 0;
- }
- static int chksum_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out)
- {
- u64 *crc = shash_desc_ctx(desc);
- return __chksum_finup(*crc, data, len, out);
- }
- static int chksum_digest(struct shash_desc *desc, const u8 *data,
- unsigned int length, u8 *out)
- {
- return __chksum_finup(0, data, length, out);
- }
- static struct shash_alg alg = {
- .digestsize = sizeof(u64),
- .init = chksum_init,
- .update = chksum_update,
- .final = chksum_final,
- .finup = chksum_finup,
- .digest = chksum_digest,
- .descsize = sizeof(u64),
- .base = {
- .cra_name = CRC64_ROCKSOFT_STRING,
- .cra_driver_name = "crc64-rocksoft-generic",
- .cra_priority = 200,
- .cra_blocksize = 1,
- .cra_module = THIS_MODULE,
- }
- };
- static int __init crc64_rocksoft_init(void)
- {
- return crypto_register_shash(&alg);
- }
- static void __exit crc64_rocksoft_exit(void)
- {
- crypto_unregister_shash(&alg);
- }
- module_init(crc64_rocksoft_init);
- module_exit(crc64_rocksoft_exit);
- MODULE_LICENSE("GPL");
- MODULE_DESCRIPTION("Rocksoft model CRC64 calculation.");
- MODULE_ALIAS_CRYPTO("crc64-rocksoft");
- MODULE_ALIAS_CRYPTO("crc64-rocksoft-generic");
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