1 // SPDX-License-Identifier: GPL-2.0-only
3  * Glue code for POLYVAL using ARMv8 Crypto Extensions
5  * Copyright (c) 2007 Nokia Siemens Networks - Mikko Herranen <mh1@iki.fi>
12  * Glue code based on ghash-clmulni-intel_glue.c.
15  * ARMv8 Crypto Extensions instructions to implement the finite field operations.
56 		polyval_update_non4k(keys->key_powers[NUM_KEY_POWERS-1], in,  in internal_polyval_update()
79 		return -EINVAL;  in polyval_arm64_setkey()
81 	memcpy(tctx->key_powers[NUM_KEY_POWERS-1], key, POLYVAL_BLOCK_SIZE);  in polyval_arm64_setkey()
83 	for (i = NUM_KEY_POWERS-2; i >= 0; i--) {  in polyval_arm64_setkey()
84 		memcpy(tctx->key_powers[i], key, POLYVAL_BLOCK_SIZE);  in polyval_arm64_setkey()
85 		internal_polyval_mul(tctx->key_powers[i],  in polyval_arm64_setkey()
86 				     tctx->key_powers[i+1]);  in polyval_arm64_setkey()
105 	const struct polyval_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);  in polyval_arm64_update()
110 	if (dctx->bytes) {  in polyval_arm64_update()
111 		n = min(srclen, dctx->bytes);  in polyval_arm64_update()
112 		pos = dctx->buffer + POLYVAL_BLOCK_SIZE - dctx->bytes;  in polyval_arm64_update()
114 		dctx->bytes -= n;  in polyval_arm64_update()
115 		srclen -= n;  in polyval_arm64_update()
117 		while (n--)  in polyval_arm64_update()
120 		if (!dctx->bytes)  in polyval_arm64_update()
121 			internal_polyval_mul(dctx->buffer,  in polyval_arm64_update()
122 					    tctx->key_powers[NUM_KEY_POWERS-1]);  in polyval_arm64_update()
128 		internal_polyval_update(tctx, src, nblocks, dctx->buffer);  in polyval_arm64_update()
129 		srclen -= nblocks * POLYVAL_BLOCK_SIZE;  in polyval_arm64_update()
134 		dctx->bytes = POLYVAL_BLOCK_SIZE - srclen;  in polyval_arm64_update()
135 		pos = dctx->buffer;  in polyval_arm64_update()
136 		while (srclen--)  in polyval_arm64_update()
146 	const struct polyval_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);  in polyval_arm64_final()
148 	if (dctx->bytes) {  in polyval_arm64_final()
149 		internal_polyval_mul(dctx->buffer,  in polyval_arm64_final()
150 				     tctx->key_powers[NUM_KEY_POWERS-1]);  in polyval_arm64_final()
153 	memcpy(dst, dctx->buffer, POLYVAL_BLOCK_SIZE);  in polyval_arm64_final()
167 		.cra_driver_name	= "polyval-ce",
189 MODULE_DESCRIPTION("POLYVAL hash function accelerated by ARMv8 Crypto Extensions");
191 MODULE_ALIAS_CRYPTO("polyval-ce");