1 /* Glue code for SHA512 hashing optimized for sparc64 crypto opcodes.
3 * This is based largely upon crypto/sha512_generic.c
5 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
6 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
7 * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <crypto/internal/hash.h>
13 #include <linux/init.h>
14 #include <linux/module.h>
16 #include <linux/cryptohash.h>
17 #include <linux/types.h>
18 #include <crypto/sha.h>
20 #include <asm/pstate.h>
25 asmlinkage void sha512_sparc64_transform(u64 *digest, const char *data,
28 static int sha512_sparc64_init(struct shash_desc *desc)
30 struct sha512_state *sctx = shash_desc_ctx(desc);
31 sctx->state[0] = SHA512_H0;
32 sctx->state[1] = SHA512_H1;
33 sctx->state[2] = SHA512_H2;
34 sctx->state[3] = SHA512_H3;
35 sctx->state[4] = SHA512_H4;
36 sctx->state[5] = SHA512_H5;
37 sctx->state[6] = SHA512_H6;
38 sctx->state[7] = SHA512_H7;
39 sctx->count[0] = sctx->count[1] = 0;
44 static int sha384_sparc64_init(struct shash_desc *desc)
46 struct sha512_state *sctx = shash_desc_ctx(desc);
47 sctx->state[0] = SHA384_H0;
48 sctx->state[1] = SHA384_H1;
49 sctx->state[2] = SHA384_H2;
50 sctx->state[3] = SHA384_H3;
51 sctx->state[4] = SHA384_H4;
52 sctx->state[5] = SHA384_H5;
53 sctx->state[6] = SHA384_H6;
54 sctx->state[7] = SHA384_H7;
55 sctx->count[0] = sctx->count[1] = 0;
60 static void __sha512_sparc64_update(struct sha512_state *sctx, const u8 *data,
61 unsigned int len, unsigned int partial)
63 unsigned int done = 0;
65 if ((sctx->count[0] += len) < len)
68 done = SHA512_BLOCK_SIZE - partial;
69 memcpy(sctx->buf + partial, data, done);
70 sha512_sparc64_transform(sctx->state, sctx->buf, 1);
72 if (len - done >= SHA512_BLOCK_SIZE) {
73 const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;
75 sha512_sparc64_transform(sctx->state, data + done, rounds);
76 done += rounds * SHA512_BLOCK_SIZE;
79 memcpy(sctx->buf, data + done, len - done);
82 static int sha512_sparc64_update(struct shash_desc *desc, const u8 *data,
85 struct sha512_state *sctx = shash_desc_ctx(desc);
86 unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
88 /* Handle the fast case right here */
89 if (partial + len < SHA512_BLOCK_SIZE) {
90 if ((sctx->count[0] += len) < len)
92 memcpy(sctx->buf + partial, data, len);
94 __sha512_sparc64_update(sctx, data, len, partial);
99 static int sha512_sparc64_final(struct shash_desc *desc, u8 *out)
101 struct sha512_state *sctx = shash_desc_ctx(desc);
102 unsigned int i, index, padlen;
103 __be64 *dst = (__be64 *)out;
105 static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };
107 /* Save number of bits */
108 bits[1] = cpu_to_be64(sctx->count[0] << 3);
109 bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
111 /* Pad out to 112 mod 128 and append length */
112 index = sctx->count[0] % SHA512_BLOCK_SIZE;
113 padlen = (index < 112) ? (112 - index) : ((SHA512_BLOCK_SIZE+112) - index);
115 /* We need to fill a whole block for __sha512_sparc64_update() */
117 if ((sctx->count[0] += padlen) < padlen)
119 memcpy(sctx->buf + index, padding, padlen);
121 __sha512_sparc64_update(sctx, padding, padlen, index);
123 __sha512_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 112);
125 /* Store state in digest */
126 for (i = 0; i < 8; i++)
127 dst[i] = cpu_to_be64(sctx->state[i]);
130 memset(sctx, 0, sizeof(*sctx));
135 static int sha384_sparc64_final(struct shash_desc *desc, u8 *hash)
139 sha512_sparc64_final(desc, D);
142 memzero_explicit(D, 64);
147 static struct shash_alg sha512 = {
148 .digestsize = SHA512_DIGEST_SIZE,
149 .init = sha512_sparc64_init,
150 .update = sha512_sparc64_update,
151 .final = sha512_sparc64_final,
152 .descsize = sizeof(struct sha512_state),
154 .cra_name = "sha512",
155 .cra_driver_name= "sha512-sparc64",
156 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
157 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
158 .cra_blocksize = SHA512_BLOCK_SIZE,
159 .cra_module = THIS_MODULE,
163 static struct shash_alg sha384 = {
164 .digestsize = SHA384_DIGEST_SIZE,
165 .init = sha384_sparc64_init,
166 .update = sha512_sparc64_update,
167 .final = sha384_sparc64_final,
168 .descsize = sizeof(struct sha512_state),
170 .cra_name = "sha384",
171 .cra_driver_name= "sha384-sparc64",
172 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
173 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
174 .cra_blocksize = SHA384_BLOCK_SIZE,
175 .cra_module = THIS_MODULE,
179 static bool __init sparc64_has_sha512_opcode(void)
183 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
186 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
187 if (!(cfr & CFR_SHA512))
193 static int __init sha512_sparc64_mod_init(void)
195 if (sparc64_has_sha512_opcode()) {
196 int ret = crypto_register_shash(&sha384);
200 ret = crypto_register_shash(&sha512);
202 crypto_unregister_shash(&sha384);
206 pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n");
209 pr_info("sparc64 sha512 opcode not available.\n");
213 static void __exit sha512_sparc64_mod_fini(void)
215 crypto_unregister_shash(&sha384);
216 crypto_unregister_shash(&sha512);
219 module_init(sha512_sparc64_mod_init);
220 module_exit(sha512_sparc64_mod_fini);
222 MODULE_LICENSE("GPL");
223 MODULE_DESCRIPTION("SHA-384 and SHA-512 Secure Hash Algorithm, sparc64 sha512 opcode accelerated");
225 MODULE_ALIAS_CRYPTO("sha384");
226 MODULE_ALIAS_CRYPTO("sha512");
228 #include "crop_devid.c"