Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Poly1305 authenticator algorithm, RFC7539
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2015 Martin Willi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Based on public domain code by Andrew Moon and Daniel J. Bernstein.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <crypto/internal/poly1305.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) void poly1305_init_generic(struct poly1305_desc_ctx *desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 			   const u8 key[POLY1305_KEY_SIZE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	poly1305_core_setkey(&desc->core_r, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	desc->s[0] = get_unaligned_le32(key + 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	desc->s[1] = get_unaligned_le32(key + 20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	desc->s[2] = get_unaligned_le32(key + 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	desc->s[3] = get_unaligned_le32(key + 28);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	poly1305_core_init(&desc->h);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	desc->buflen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	desc->sset = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	desc->rset = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) EXPORT_SYMBOL_GPL(poly1305_init_generic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) void poly1305_update_generic(struct poly1305_desc_ctx *desc, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 			     unsigned int nbytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	unsigned int bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	if (unlikely(desc->buflen)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		bytes = min(nbytes, POLY1305_BLOCK_SIZE - desc->buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		memcpy(desc->buf + desc->buflen, src, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		src += bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		nbytes -= bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		desc->buflen += bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		if (desc->buflen == POLY1305_BLOCK_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 			poly1305_core_blocks(&desc->h, &desc->core_r, desc->buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 					     1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 			desc->buflen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	if (likely(nbytes >= POLY1305_BLOCK_SIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		poly1305_core_blocks(&desc->h, &desc->core_r, src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 				     nbytes / POLY1305_BLOCK_SIZE, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		src += nbytes - (nbytes % POLY1305_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		nbytes %= POLY1305_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	if (unlikely(nbytes)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		desc->buflen = nbytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		memcpy(desc->buf, src, nbytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) EXPORT_SYMBOL_GPL(poly1305_update_generic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) void poly1305_final_generic(struct poly1305_desc_ctx *desc, u8 *dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	if (unlikely(desc->buflen)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 		desc->buf[desc->buflen++] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 		memset(desc->buf + desc->buflen, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		       POLY1305_BLOCK_SIZE - desc->buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 		poly1305_core_blocks(&desc->h, &desc->core_r, desc->buf, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	poly1305_core_emit(&desc->h, desc->s, dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	*desc = (struct poly1305_desc_ctx){};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) EXPORT_SYMBOL_GPL(poly1305_final_generic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) MODULE_AUTHOR("Martin Willi <martin@strongswan.org>");