diff options
Diffstat (limited to 'arch/powerpc/crypto/poly1305-p10-glue.c')
| -rw-r--r-- | arch/powerpc/crypto/poly1305-p10-glue.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/arch/powerpc/crypto/poly1305-p10-glue.c b/arch/powerpc/crypto/poly1305-p10-glue.c deleted file mode 100644 index 369686e9370b..000000000000 --- a/arch/powerpc/crypto/poly1305-p10-glue.c +++ /dev/null @@ -1,186 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Poly1305 authenticator algorithm, RFC7539. - * - * Copyright 2023- IBM Corp. All rights reserved. - */ - -#include <crypto/algapi.h> -#include <linux/crypto.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/jump_label.h> -#include <crypto/internal/hash.h> -#include <crypto/internal/poly1305.h> -#include <crypto/internal/simd.h> -#include <linux/cpufeature.h> -#include <linux/unaligned.h> -#include <asm/simd.h> -#include <asm/switch_to.h> - -asmlinkage void poly1305_p10le_4blocks(void *h, const u8 *m, u32 mlen); -asmlinkage void poly1305_64s(void *h, const u8 *m, u32 mlen, int highbit); -asmlinkage void poly1305_emit_64(void *h, void *s, u8 *dst); - -static void vsx_begin(void) -{ - preempt_disable(); - enable_kernel_vsx(); -} - -static void vsx_end(void) -{ - disable_kernel_vsx(); - preempt_enable(); -} - -static int crypto_poly1305_p10_init(struct shash_desc *desc) -{ - struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc); - - poly1305_core_init(&dctx->h); - dctx->buflen = 0; - dctx->rset = 0; - dctx->sset = false; - - return 0; -} - -static unsigned int crypto_poly1305_setdctxkey(struct poly1305_desc_ctx *dctx, - const u8 *inp, unsigned int len) -{ - unsigned int acc = 0; - - if (unlikely(!dctx->sset)) { - if (!dctx->rset && len >= POLY1305_BLOCK_SIZE) { - struct poly1305_core_key *key = &dctx->core_r; - - key->key.r64[0] = get_unaligned_le64(&inp[0]); - key->key.r64[1] = get_unaligned_le64(&inp[8]); - inp += POLY1305_BLOCK_SIZE; - len -= POLY1305_BLOCK_SIZE; - acc += POLY1305_BLOCK_SIZE; - dctx->rset = 1; - } - if (len >= POLY1305_BLOCK_SIZE) { - dctx->s[0] = get_unaligned_le32(&inp[0]); - dctx->s[1] = get_unaligned_le32(&inp[4]); - dctx->s[2] = get_unaligned_le32(&inp[8]); - dctx->s[3] = get_unaligned_le32(&inp[12]); - acc += POLY1305_BLOCK_SIZE; - dctx->sset = true; - } - } - return acc; -} - -static int crypto_poly1305_p10_update(struct shash_desc *desc, - const u8 *src, unsigned int srclen) -{ - struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc); - unsigned int bytes, used; - - if (unlikely(dctx->buflen)) { - bytes = min(srclen, POLY1305_BLOCK_SIZE - dctx->buflen); - memcpy(dctx->buf + dctx->buflen, src, bytes); - src += bytes; - srclen -= bytes; - dctx->buflen += bytes; - - if (dctx->buflen == POLY1305_BLOCK_SIZE) { - if (likely(!crypto_poly1305_setdctxkey(dctx, dctx->buf, - POLY1305_BLOCK_SIZE))) { - vsx_begin(); - poly1305_64s(&dctx->h, dctx->buf, - POLY1305_BLOCK_SIZE, 1); - vsx_end(); - } - dctx->buflen = 0; - } - } - - if (likely(srclen >= POLY1305_BLOCK_SIZE)) { - bytes = round_down(srclen, POLY1305_BLOCK_SIZE); - used = crypto_poly1305_setdctxkey(dctx, src, bytes); - if (likely(used)) { - srclen -= used; - src += used; - } - if (crypto_simd_usable() && (srclen >= POLY1305_BLOCK_SIZE*4)) { - vsx_begin(); - poly1305_p10le_4blocks(&dctx->h, src, srclen); - vsx_end(); - src += srclen - (srclen % (POLY1305_BLOCK_SIZE * 4)); - srclen %= POLY1305_BLOCK_SIZE * 4; - } - while (srclen >= POLY1305_BLOCK_SIZE) { - vsx_begin(); - poly1305_64s(&dctx->h, src, POLY1305_BLOCK_SIZE, 1); - vsx_end(); - srclen -= POLY1305_BLOCK_SIZE; - src += POLY1305_BLOCK_SIZE; - } - } - - if (unlikely(srclen)) { - dctx->buflen = srclen; - memcpy(dctx->buf, src, srclen); - } - - return 0; -} - -static int crypto_poly1305_p10_final(struct shash_desc *desc, u8 *dst) -{ - struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc); - - if (unlikely(!dctx->sset)) - return -ENOKEY; - - if ((dctx->buflen)) { - dctx->buf[dctx->buflen++] = 1; - memset(dctx->buf + dctx->buflen, 0, - POLY1305_BLOCK_SIZE - dctx->buflen); - vsx_begin(); - poly1305_64s(&dctx->h, dctx->buf, POLY1305_BLOCK_SIZE, 0); - vsx_end(); - dctx->buflen = 0; - } - - poly1305_emit_64(&dctx->h, &dctx->s, dst); - return 0; -} - -static struct shash_alg poly1305_alg = { - .digestsize = POLY1305_DIGEST_SIZE, - .init = crypto_poly1305_p10_init, - .update = crypto_poly1305_p10_update, - .final = crypto_poly1305_p10_final, - .descsize = sizeof(struct poly1305_desc_ctx), - .base = { - .cra_name = "poly1305", - .cra_driver_name = "poly1305-p10", - .cra_priority = 300, - .cra_blocksize = POLY1305_BLOCK_SIZE, - .cra_module = THIS_MODULE, - }, -}; - -static int __init poly1305_p10_init(void) -{ - return crypto_register_shash(&poly1305_alg); -} - -static void __exit poly1305_p10_exit(void) -{ - crypto_unregister_shash(&poly1305_alg); -} - -module_cpu_feature_match(PPC_MODULE_FEATURE_P10, poly1305_p10_init); -module_exit(poly1305_p10_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Danny Tsen <dtsen@linux.ibm.com>"); -MODULE_DESCRIPTION("Optimized Poly1305 for P10"); -MODULE_ALIAS_CRYPTO("poly1305"); -MODULE_ALIAS_CRYPTO("poly1305-p10"); |