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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | /* Glue code for SHA1 hashing optimized for sparc64 crypto opcodes. * * This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c * * Copyright (c) Alan Smithee. * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> * Copyright (c) Mathias Krause <minipli@googlemail.com> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <crypto/internal/hash.h> #include <linux/init.h> #include <linux/module.h> #include <linux/mm.h> #include <linux/cryptohash.h> #include <linux/types.h> #include <crypto/sha.h> #include <asm/pstate.h> #include <asm/elf.h> #include "opcodes.h" asmlinkage void sha1_sparc64_transform(u32 *digest, const char *data, unsigned int rounds); static int sha1_sparc64_init(struct shash_desc *desc) { struct sha1_state *sctx = shash_desc_ctx(desc); *sctx = (struct sha1_state){ .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 }, }; return 0; } static void __sha1_sparc64_update(struct sha1_state *sctx, const u8 *data, unsigned int len, unsigned int partial) { unsigned int done = 0; sctx->count += len; if (partial) { done = SHA1_BLOCK_SIZE - partial; memcpy(sctx->buffer + partial, data, done); sha1_sparc64_transform(sctx->state, sctx->buffer, 1); } if (len - done >= SHA1_BLOCK_SIZE) { const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE; sha1_sparc64_transform(sctx->state, data + done, rounds); done += rounds * SHA1_BLOCK_SIZE; } memcpy(sctx->buffer, data + done, len - done); } static int sha1_sparc64_update(struct shash_desc *desc, const u8 *data, unsigned int len) { struct sha1_state *sctx = shash_desc_ctx(desc); unsigned int partial = sctx->count % SHA1_BLOCK_SIZE; /* Handle the fast case right here */ if (partial + len < SHA1_BLOCK_SIZE) { sctx->count += len; memcpy(sctx->buffer + partial, data, len); } else __sha1_sparc64_update(sctx, data, len, partial); return 0; } /* Add padding and return the message digest. */ static int sha1_sparc64_final(struct shash_desc *desc, u8 *out) { struct sha1_state *sctx = shash_desc_ctx(desc); unsigned int i, index, padlen; __be32 *dst = (__be32 *)out; __be64 bits; static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, }; bits = cpu_to_be64(sctx->count << 3); /* Pad out to 56 mod 64 and append length */ index = sctx->count % SHA1_BLOCK_SIZE; padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index); /* We need to fill a whole block for __sha1_sparc64_update() */ if (padlen <= 56) { sctx->count += padlen; memcpy(sctx->buffer + index, padding, padlen); } else { __sha1_sparc64_update(sctx, padding, padlen, index); } __sha1_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56); /* Store state in digest */ for (i = 0; i < 5; i++) dst[i] = cpu_to_be32(sctx->state[i]); /* Wipe context */ memset(sctx, 0, sizeof(*sctx)); return 0; } static int sha1_sparc64_export(struct shash_desc *desc, void *out) { struct sha1_state *sctx = shash_desc_ctx(desc); memcpy(out, sctx, sizeof(*sctx)); return 0; } static int sha1_sparc64_import(struct shash_desc *desc, const void *in) { struct sha1_state *sctx = shash_desc_ctx(desc); memcpy(sctx, in, sizeof(*sctx)); return 0; } static struct shash_alg alg = { .digestsize = SHA1_DIGEST_SIZE, .init = sha1_sparc64_init, .update = sha1_sparc64_update, .final = sha1_sparc64_final, .export = sha1_sparc64_export, .import = sha1_sparc64_import, .descsize = sizeof(struct sha1_state), .statesize = sizeof(struct sha1_state), .base = { .cra_name = "sha1", .cra_driver_name= "sha1-sparc64", .cra_priority = SPARC_CR_OPCODE_PRIORITY, .cra_blocksize = SHA1_BLOCK_SIZE, .cra_module = THIS_MODULE, } }; static bool __init sparc64_has_sha1_opcode(void) { unsigned long cfr; if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) return false; __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); if (!(cfr & CFR_SHA1)) return false; return true; } static int __init sha1_sparc64_mod_init(void) { if (sparc64_has_sha1_opcode()) { pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n"); return crypto_register_shash(&alg); } pr_info("sparc64 sha1 opcode not available.\n"); return -ENODEV; } static void __exit sha1_sparc64_mod_fini(void) { crypto_unregister_shash(&alg); } module_init(sha1_sparc64_mod_init); module_exit(sha1_sparc64_mod_fini); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated"); MODULE_ALIAS_CRYPTO("sha1"); #include "crop_devid.c" |