^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Glue code for SHA1 hashing optimized for sparc64 crypto opcodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) Alan Smithee.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (c) Mathias Krause <minipli@googlemail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <crypto/sha.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/pstate.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "opcodes.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) asmlinkage void sha1_sparc64_transform(u32 *digest, const char *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) unsigned int rounds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int sha1_sparc64_init(struct shash_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct sha1_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) *sctx = (struct sha1_state){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static void __sha1_sparc64_update(struct sha1_state *sctx, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned int len, unsigned int partial)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned int done = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) sctx->count += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (partial) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) done = SHA1_BLOCK_SIZE - partial;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) memcpy(sctx->buffer + partial, data, done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) sha1_sparc64_transform(sctx->state, sctx->buffer, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (len - done >= SHA1_BLOCK_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) sha1_sparc64_transform(sctx->state, data + done, rounds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) done += rounds * SHA1_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) memcpy(sctx->buffer, data + done, len - done);
^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) static int sha1_sparc64_update(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct sha1_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* Handle the fast case right here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (partial + len < SHA1_BLOCK_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) sctx->count += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) memcpy(sctx->buffer + partial, data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) __sha1_sparc64_update(sctx, data, len, partial);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /* Add padding and return the message digest. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static int sha1_sparc64_final(struct shash_desc *desc, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct sha1_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) unsigned int i, index, padlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) __be32 *dst = (__be32 *)out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) __be64 bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) bits = cpu_to_be64(sctx->count << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /* Pad out to 56 mod 64 and append length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) index = sctx->count % SHA1_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* We need to fill a whole block for __sha1_sparc64_update() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (padlen <= 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) sctx->count += padlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) memcpy(sctx->buffer + index, padding, padlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) __sha1_sparc64_update(sctx, padding, padlen, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) __sha1_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /* Store state in digest */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) for (i = 0; i < 5; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) dst[i] = cpu_to_be32(sctx->state[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* Wipe context */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) memset(sctx, 0, sizeof(*sctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static int sha1_sparc64_export(struct shash_desc *desc, void *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct sha1_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) memcpy(out, sctx, sizeof(*sctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static int sha1_sparc64_import(struct shash_desc *desc, const void *in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct sha1_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) memcpy(sctx, in, sizeof(*sctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static struct shash_alg alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .digestsize = SHA1_DIGEST_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .init = sha1_sparc64_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .update = sha1_sparc64_update,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .final = sha1_sparc64_final,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .export = sha1_sparc64_export,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .import = sha1_sparc64_import,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .descsize = sizeof(struct sha1_state),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .statesize = sizeof(struct sha1_state),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .base = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .cra_name = "sha1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .cra_driver_name= "sha1-sparc64",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .cra_priority = SPARC_CR_OPCODE_PRIORITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .cra_blocksize = SHA1_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^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) static bool __init sparc64_has_sha1_opcode(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) unsigned long cfr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (!(cfr & CFR_SHA1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static int __init sha1_sparc64_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (sparc64_has_sha1_opcode()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return crypto_register_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) pr_info("sparc64 sha1 opcode not available.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static void __exit sha1_sparc64_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) crypto_unregister_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) module_init(sha1_sparc64_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) module_exit(sha1_sparc64_mod_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) MODULE_ALIAS_CRYPTO("sha1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) #include "crop_devid.c"
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