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