^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* GPL HEADER START
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This program is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * it under the terms of the GNU General Public License version 2 only,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * as published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This program is distributed in the hope that it will be useful, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * General Public License version 2 for more details (a copy is included
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * in the LICENSE file that accompanied this code).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * You should have received a copy of the GNU General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * version 2 along with this program; If not, see http://www.gnu.org/licenses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Please visit http://www.xyratex.com/contact if you need additional
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * information or have any questions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * GPL HEADER END
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * Copyright 2012 Xyratex Technology Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * This is crypto api shash wrappers to crc32_le.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/crc32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define CHKSUM_BLOCK_SIZE 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define CHKSUM_DIGEST_SIZE 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /** No default init with ~0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int crc32_cra_init(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u32 *key = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) *key = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * Setting the seed allows arbitrary accumulators and flexible XOR policy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * If your algorithm starts with ~0, then XOR with ~0 before you set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * the seed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static int crc32_setkey(struct crypto_shash *hash, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) u32 *mctx = crypto_shash_ctx(hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (keylen != sizeof(u32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) *mctx = get_unaligned_le32(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static int crc32_init(struct shash_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) u32 *mctx = crypto_shash_ctx(desc->tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) u32 *crcp = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) *crcp = *mctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static int crc32_update(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) u32 *crcp = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) *crcp = crc32_le(*crcp, data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /* No final XOR 0xFFFFFFFF, like crc32_le */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static int __crc32_finup(u32 *crcp, const u8 *data, unsigned int len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) put_unaligned_le32(crc32_le(*crcp, data, len), out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static int crc32_finup(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) unsigned int len, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return __crc32_finup(shash_desc_ctx(desc), data, len, out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int crc32_final(struct shash_desc *desc, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) u32 *crcp = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) put_unaligned_le32(*crcp, out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static int crc32_digest(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) unsigned int len, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return __crc32_finup(crypto_shash_ctx(desc->tfm), data, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static struct shash_alg alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .setkey = crc32_setkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .init = crc32_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .update = crc32_update,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .final = crc32_final,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .finup = crc32_finup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .digest = crc32_digest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .descsize = sizeof(u32),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .digestsize = CHKSUM_DIGEST_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .base = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .cra_name = "crc32",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .cra_driver_name = "crc32-generic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .cra_priority = 100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .cra_blocksize = CHKSUM_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .cra_ctxsize = sizeof(u32),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .cra_init = crc32_cra_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int __init crc32_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return crypto_register_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static void __exit crc32_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) crypto_unregister_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) subsys_initcall(crc32_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) module_exit(crc32_mod_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) MODULE_AUTHOR("Alexander Boyko <alexander_boyko@xyratex.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) MODULE_DESCRIPTION("CRC32 calculations wrapper for lib/crc32");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) MODULE_ALIAS_CRYPTO("crc32");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) MODULE_ALIAS_CRYPTO("crc32-generic");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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