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226 lines
5.6 KiB
226 lines
5.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* Glue code for SHA512 hashing optimized for sparc64 crypto opcodes. |
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* |
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* This is based largely upon crypto/sha512_generic.c |
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* |
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* Copyright (c) Jean-Luc Cooke <[email protected]> |
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* Copyright (c) Andrew McDonald <[email protected]> |
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* Copyright (c) 2003 Kyle McMartin <[email protected]> |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <crypto/internal/hash.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/mm.h> |
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#include <linux/types.h> |
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#include <crypto/sha2.h> |
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#include <asm/pstate.h> |
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#include <asm/elf.h> |
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#include "opcodes.h" |
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asmlinkage void sha512_sparc64_transform(u64 *digest, const char *data, |
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unsigned int rounds); |
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static int sha512_sparc64_init(struct shash_desc *desc) |
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{ |
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struct sha512_state *sctx = shash_desc_ctx(desc); |
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sctx->state[0] = SHA512_H0; |
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sctx->state[1] = SHA512_H1; |
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sctx->state[2] = SHA512_H2; |
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sctx->state[3] = SHA512_H3; |
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sctx->state[4] = SHA512_H4; |
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sctx->state[5] = SHA512_H5; |
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sctx->state[6] = SHA512_H6; |
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sctx->state[7] = SHA512_H7; |
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sctx->count[0] = sctx->count[1] = 0; |
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return 0; |
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} |
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static int sha384_sparc64_init(struct shash_desc *desc) |
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{ |
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struct sha512_state *sctx = shash_desc_ctx(desc); |
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sctx->state[0] = SHA384_H0; |
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sctx->state[1] = SHA384_H1; |
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sctx->state[2] = SHA384_H2; |
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sctx->state[3] = SHA384_H3; |
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sctx->state[4] = SHA384_H4; |
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sctx->state[5] = SHA384_H5; |
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sctx->state[6] = SHA384_H6; |
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sctx->state[7] = SHA384_H7; |
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sctx->count[0] = sctx->count[1] = 0; |
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return 0; |
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} |
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static void __sha512_sparc64_update(struct sha512_state *sctx, const u8 *data, |
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unsigned int len, unsigned int partial) |
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{ |
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unsigned int done = 0; |
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if ((sctx->count[0] += len) < len) |
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sctx->count[1]++; |
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if (partial) { |
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done = SHA512_BLOCK_SIZE - partial; |
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memcpy(sctx->buf + partial, data, done); |
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sha512_sparc64_transform(sctx->state, sctx->buf, 1); |
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} |
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if (len - done >= SHA512_BLOCK_SIZE) { |
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const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE; |
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sha512_sparc64_transform(sctx->state, data + done, rounds); |
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done += rounds * SHA512_BLOCK_SIZE; |
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} |
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memcpy(sctx->buf, data + done, len - done); |
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} |
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static int sha512_sparc64_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len) |
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{ |
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struct sha512_state *sctx = shash_desc_ctx(desc); |
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unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE; |
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/* Handle the fast case right here */ |
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if (partial + len < SHA512_BLOCK_SIZE) { |
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if ((sctx->count[0] += len) < len) |
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sctx->count[1]++; |
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memcpy(sctx->buf + partial, data, len); |
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} else |
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__sha512_sparc64_update(sctx, data, len, partial); |
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return 0; |
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} |
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static int sha512_sparc64_final(struct shash_desc *desc, u8 *out) |
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{ |
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struct sha512_state *sctx = shash_desc_ctx(desc); |
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unsigned int i, index, padlen; |
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__be64 *dst = (__be64 *)out; |
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__be64 bits[2]; |
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static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, }; |
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/* Save number of bits */ |
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bits[1] = cpu_to_be64(sctx->count[0] << 3); |
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bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61); |
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/* Pad out to 112 mod 128 and append length */ |
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index = sctx->count[0] % SHA512_BLOCK_SIZE; |
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padlen = (index < 112) ? (112 - index) : ((SHA512_BLOCK_SIZE+112) - index); |
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/* We need to fill a whole block for __sha512_sparc64_update() */ |
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if (padlen <= 112) { |
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if ((sctx->count[0] += padlen) < padlen) |
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sctx->count[1]++; |
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memcpy(sctx->buf + index, padding, padlen); |
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} else { |
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__sha512_sparc64_update(sctx, padding, padlen, index); |
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} |
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__sha512_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 112); |
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/* Store state in digest */ |
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for (i = 0; i < 8; i++) |
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dst[i] = cpu_to_be64(sctx->state[i]); |
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/* Wipe context */ |
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memset(sctx, 0, sizeof(*sctx)); |
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return 0; |
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} |
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static int sha384_sparc64_final(struct shash_desc *desc, u8 *hash) |
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{ |
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u8 D[64]; |
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sha512_sparc64_final(desc, D); |
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memcpy(hash, D, 48); |
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memzero_explicit(D, 64); |
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return 0; |
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} |
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static struct shash_alg sha512 = { |
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.digestsize = SHA512_DIGEST_SIZE, |
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.init = sha512_sparc64_init, |
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.update = sha512_sparc64_update, |
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.final = sha512_sparc64_final, |
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.descsize = sizeof(struct sha512_state), |
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.base = { |
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.cra_name = "sha512", |
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.cra_driver_name= "sha512-sparc64", |
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.cra_priority = SPARC_CR_OPCODE_PRIORITY, |
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.cra_blocksize = SHA512_BLOCK_SIZE, |
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.cra_module = THIS_MODULE, |
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} |
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}; |
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static struct shash_alg sha384 = { |
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.digestsize = SHA384_DIGEST_SIZE, |
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.init = sha384_sparc64_init, |
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.update = sha512_sparc64_update, |
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.final = sha384_sparc64_final, |
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.descsize = sizeof(struct sha512_state), |
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.base = { |
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.cra_name = "sha384", |
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.cra_driver_name= "sha384-sparc64", |
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.cra_priority = SPARC_CR_OPCODE_PRIORITY, |
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.cra_blocksize = SHA384_BLOCK_SIZE, |
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.cra_module = THIS_MODULE, |
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} |
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}; |
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static bool __init sparc64_has_sha512_opcode(void) |
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{ |
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unsigned long cfr; |
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if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) |
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return false; |
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__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); |
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if (!(cfr & CFR_SHA512)) |
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return false; |
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return true; |
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} |
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static int __init sha512_sparc64_mod_init(void) |
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{ |
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if (sparc64_has_sha512_opcode()) { |
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int ret = crypto_register_shash(&sha384); |
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if (ret < 0) |
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return ret; |
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ret = crypto_register_shash(&sha512); |
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if (ret < 0) { |
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crypto_unregister_shash(&sha384); |
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return ret; |
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} |
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pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n"); |
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return 0; |
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} |
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pr_info("sparc64 sha512 opcode not available.\n"); |
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return -ENODEV; |
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} |
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static void __exit sha512_sparc64_mod_fini(void) |
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{ |
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crypto_unregister_shash(&sha384); |
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crypto_unregister_shash(&sha512); |
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} |
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module_init(sha512_sparc64_mod_init); |
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module_exit(sha512_sparc64_mod_fini); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("SHA-384 and SHA-512 Secure Hash Algorithm, sparc64 sha512 opcode accelerated"); |
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MODULE_ALIAS_CRYPTO("sha384"); |
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MODULE_ALIAS_CRYPTO("sha512"); |
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#include "crop_devid.c"
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