109c434b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2fa4dfedcSDavid S. Miller /* Glue code for MD5 hashing optimized for sparc64 crypto opcodes.
3fa4dfedcSDavid S. Miller *
4fa4dfedcSDavid S. Miller * This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
5fa4dfedcSDavid S. Miller * and crypto/md5.c which are:
6fa4dfedcSDavid S. Miller *
7fa4dfedcSDavid S. Miller * Copyright (c) Alan Smithee.
8fa4dfedcSDavid S. Miller * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
9fa4dfedcSDavid S. Miller * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
10fa4dfedcSDavid S. Miller * Copyright (c) Mathias Krause <minipli@googlemail.com>
11fa4dfedcSDavid S. Miller * Copyright (c) Cryptoapi developers.
12fa4dfedcSDavid S. Miller * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
13fa4dfedcSDavid S. Miller */
14fa4dfedcSDavid S. Miller
15fa4dfedcSDavid S. Miller #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16fa4dfedcSDavid S. Miller
17fa4dfedcSDavid S. Miller #include <crypto/internal/hash.h>
18fa4dfedcSDavid S. Miller #include <linux/init.h>
19fa4dfedcSDavid S. Miller #include <linux/module.h>
20fa4dfedcSDavid S. Miller #include <linux/mm.h>
21fa4dfedcSDavid S. Miller #include <linux/types.h>
22fa4dfedcSDavid S. Miller #include <crypto/md5.h>
23fa4dfedcSDavid S. Miller
24fa4dfedcSDavid S. Miller #include <asm/pstate.h>
25fa4dfedcSDavid S. Miller #include <asm/elf.h>
26fa4dfedcSDavid S. Miller
2710803624SDavid S. Miller #include "opcodes.h"
2810803624SDavid S. Miller
29fa4dfedcSDavid S. Miller asmlinkage void md5_sparc64_transform(u32 *digest, const char *data,
30fa4dfedcSDavid S. Miller unsigned int rounds);
31fa4dfedcSDavid S. Miller
md5_sparc64_init(struct shash_desc * desc)32fa4dfedcSDavid S. Miller static int md5_sparc64_init(struct shash_desc *desc)
33fa4dfedcSDavid S. Miller {
34fa4dfedcSDavid S. Miller struct md5_state *mctx = shash_desc_ctx(desc);
35fa4dfedcSDavid S. Miller
36*6cf1a144SHerbert Xu mctx->hash[0] = MD5_H0;
37*6cf1a144SHerbert Xu mctx->hash[1] = MD5_H1;
38*6cf1a144SHerbert Xu mctx->hash[2] = MD5_H2;
39*6cf1a144SHerbert Xu mctx->hash[3] = MD5_H3;
40*6cf1a144SHerbert Xu le32_to_cpu_array(mctx->hash, 4);
41fa4dfedcSDavid S. Miller mctx->byte_count = 0;
42fa4dfedcSDavid S. Miller
43fa4dfedcSDavid S. Miller return 0;
44fa4dfedcSDavid S. Miller }
45fa4dfedcSDavid S. Miller
__md5_sparc64_update(struct md5_state * sctx,const u8 * data,unsigned int len,unsigned int partial)46fa4dfedcSDavid S. Miller static void __md5_sparc64_update(struct md5_state *sctx, const u8 *data,
47fa4dfedcSDavid S. Miller unsigned int len, unsigned int partial)
48fa4dfedcSDavid S. Miller {
49fa4dfedcSDavid S. Miller unsigned int done = 0;
50fa4dfedcSDavid S. Miller
51fa4dfedcSDavid S. Miller sctx->byte_count += len;
52fa4dfedcSDavid S. Miller if (partial) {
53fa4dfedcSDavid S. Miller done = MD5_HMAC_BLOCK_SIZE - partial;
54fa4dfedcSDavid S. Miller memcpy((u8 *)sctx->block + partial, data, done);
55fa4dfedcSDavid S. Miller md5_sparc64_transform(sctx->hash, (u8 *)sctx->block, 1);
56fa4dfedcSDavid S. Miller }
57fa4dfedcSDavid S. Miller if (len - done >= MD5_HMAC_BLOCK_SIZE) {
58fa4dfedcSDavid S. Miller const unsigned int rounds = (len - done) / MD5_HMAC_BLOCK_SIZE;
59fa4dfedcSDavid S. Miller
60fa4dfedcSDavid S. Miller md5_sparc64_transform(sctx->hash, data + done, rounds);
61fa4dfedcSDavid S. Miller done += rounds * MD5_HMAC_BLOCK_SIZE;
62fa4dfedcSDavid S. Miller }
63fa4dfedcSDavid S. Miller
64fa4dfedcSDavid S. Miller memcpy(sctx->block, data + done, len - done);
65fa4dfedcSDavid S. Miller }
66fa4dfedcSDavid S. Miller
md5_sparc64_update(struct shash_desc * desc,const u8 * data,unsigned int len)67fa4dfedcSDavid S. Miller static int md5_sparc64_update(struct shash_desc *desc, const u8 *data,
68fa4dfedcSDavid S. Miller unsigned int len)
69fa4dfedcSDavid S. Miller {
70fa4dfedcSDavid S. Miller struct md5_state *sctx = shash_desc_ctx(desc);
71fa4dfedcSDavid S. Miller unsigned int partial = sctx->byte_count % MD5_HMAC_BLOCK_SIZE;
72fa4dfedcSDavid S. Miller
73fa4dfedcSDavid S. Miller /* Handle the fast case right here */
74fa4dfedcSDavid S. Miller if (partial + len < MD5_HMAC_BLOCK_SIZE) {
75fa4dfedcSDavid S. Miller sctx->byte_count += len;
76fa4dfedcSDavid S. Miller memcpy((u8 *)sctx->block + partial, data, len);
77fa4dfedcSDavid S. Miller } else
78fa4dfedcSDavid S. Miller __md5_sparc64_update(sctx, data, len, partial);
79fa4dfedcSDavid S. Miller
80fa4dfedcSDavid S. Miller return 0;
81fa4dfedcSDavid S. Miller }
82fa4dfedcSDavid S. Miller
83fa4dfedcSDavid S. Miller /* Add padding and return the message digest. */
md5_sparc64_final(struct shash_desc * desc,u8 * out)84fa4dfedcSDavid S. Miller static int md5_sparc64_final(struct shash_desc *desc, u8 *out)
85fa4dfedcSDavid S. Miller {
86fa4dfedcSDavid S. Miller struct md5_state *sctx = shash_desc_ctx(desc);
87fa4dfedcSDavid S. Miller unsigned int i, index, padlen;
88fa4dfedcSDavid S. Miller u32 *dst = (u32 *)out;
89fa4dfedcSDavid S. Miller __le64 bits;
90fa4dfedcSDavid S. Miller static const u8 padding[MD5_HMAC_BLOCK_SIZE] = { 0x80, };
91fa4dfedcSDavid S. Miller
92fa4dfedcSDavid S. Miller bits = cpu_to_le64(sctx->byte_count << 3);
93fa4dfedcSDavid S. Miller
94fa4dfedcSDavid S. Miller /* Pad out to 56 mod 64 and append length */
95fa4dfedcSDavid S. Miller index = sctx->byte_count % MD5_HMAC_BLOCK_SIZE;
96fa4dfedcSDavid S. Miller padlen = (index < 56) ? (56 - index) : ((MD5_HMAC_BLOCK_SIZE+56) - index);
97fa4dfedcSDavid S. Miller
98fa4dfedcSDavid S. Miller /* We need to fill a whole block for __md5_sparc64_update() */
99fa4dfedcSDavid S. Miller if (padlen <= 56) {
100fa4dfedcSDavid S. Miller sctx->byte_count += padlen;
101fa4dfedcSDavid S. Miller memcpy((u8 *)sctx->block + index, padding, padlen);
102fa4dfedcSDavid S. Miller } else {
103fa4dfedcSDavid S. Miller __md5_sparc64_update(sctx, padding, padlen, index);
104fa4dfedcSDavid S. Miller }
105fa4dfedcSDavid S. Miller __md5_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
106fa4dfedcSDavid S. Miller
107fa4dfedcSDavid S. Miller /* Store state in digest */
108fa4dfedcSDavid S. Miller for (i = 0; i < MD5_HASH_WORDS; i++)
109fa4dfedcSDavid S. Miller dst[i] = sctx->hash[i];
110fa4dfedcSDavid S. Miller
111fa4dfedcSDavid S. Miller /* Wipe context */
112fa4dfedcSDavid S. Miller memset(sctx, 0, sizeof(*sctx));
113fa4dfedcSDavid S. Miller
114fa4dfedcSDavid S. Miller return 0;
115fa4dfedcSDavid S. Miller }
116fa4dfedcSDavid S. Miller
md5_sparc64_export(struct shash_desc * desc,void * out)117fa4dfedcSDavid S. Miller static int md5_sparc64_export(struct shash_desc *desc, void *out)
118fa4dfedcSDavid S. Miller {
119fa4dfedcSDavid S. Miller struct md5_state *sctx = shash_desc_ctx(desc);
120fa4dfedcSDavid S. Miller
121fa4dfedcSDavid S. Miller memcpy(out, sctx, sizeof(*sctx));
122fa4dfedcSDavid S. Miller
123fa4dfedcSDavid S. Miller return 0;
124fa4dfedcSDavid S. Miller }
125fa4dfedcSDavid S. Miller
md5_sparc64_import(struct shash_desc * desc,const void * in)126fa4dfedcSDavid S. Miller static int md5_sparc64_import(struct shash_desc *desc, const void *in)
127fa4dfedcSDavid S. Miller {
128fa4dfedcSDavid S. Miller struct md5_state *sctx = shash_desc_ctx(desc);
129fa4dfedcSDavid S. Miller
130fa4dfedcSDavid S. Miller memcpy(sctx, in, sizeof(*sctx));
131fa4dfedcSDavid S. Miller
132fa4dfedcSDavid S. Miller return 0;
133fa4dfedcSDavid S. Miller }
134fa4dfedcSDavid S. Miller
135fa4dfedcSDavid S. Miller static struct shash_alg alg = {
136fa4dfedcSDavid S. Miller .digestsize = MD5_DIGEST_SIZE,
137fa4dfedcSDavid S. Miller .init = md5_sparc64_init,
138fa4dfedcSDavid S. Miller .update = md5_sparc64_update,
139fa4dfedcSDavid S. Miller .final = md5_sparc64_final,
140fa4dfedcSDavid S. Miller .export = md5_sparc64_export,
141fa4dfedcSDavid S. Miller .import = md5_sparc64_import,
142fa4dfedcSDavid S. Miller .descsize = sizeof(struct md5_state),
143fa4dfedcSDavid S. Miller .statesize = sizeof(struct md5_state),
144fa4dfedcSDavid S. Miller .base = {
145fa4dfedcSDavid S. Miller .cra_name = "md5",
146fa4dfedcSDavid S. Miller .cra_driver_name= "md5-sparc64",
14710803624SDavid S. Miller .cra_priority = SPARC_CR_OPCODE_PRIORITY,
148fa4dfedcSDavid S. Miller .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
149fa4dfedcSDavid S. Miller .cra_module = THIS_MODULE,
150fa4dfedcSDavid S. Miller }
151fa4dfedcSDavid S. Miller };
152fa4dfedcSDavid S. Miller
sparc64_has_md5_opcode(void)153fa4dfedcSDavid S. Miller static bool __init sparc64_has_md5_opcode(void)
154fa4dfedcSDavid S. Miller {
155fa4dfedcSDavid S. Miller unsigned long cfr;
156fa4dfedcSDavid S. Miller
157fa4dfedcSDavid S. Miller if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
158fa4dfedcSDavid S. Miller return false;
159fa4dfedcSDavid S. Miller
160fa4dfedcSDavid S. Miller __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
161fa4dfedcSDavid S. Miller if (!(cfr & CFR_MD5))
162fa4dfedcSDavid S. Miller return false;
163fa4dfedcSDavid S. Miller
164fa4dfedcSDavid S. Miller return true;
165fa4dfedcSDavid S. Miller }
166fa4dfedcSDavid S. Miller
md5_sparc64_mod_init(void)167fa4dfedcSDavid S. Miller static int __init md5_sparc64_mod_init(void)
168fa4dfedcSDavid S. Miller {
169fa4dfedcSDavid S. Miller if (sparc64_has_md5_opcode()) {
170fa4dfedcSDavid S. Miller pr_info("Using sparc64 md5 opcode optimized MD5 implementation\n");
171fa4dfedcSDavid S. Miller return crypto_register_shash(&alg);
172fa4dfedcSDavid S. Miller }
173fa4dfedcSDavid S. Miller pr_info("sparc64 md5 opcode not available.\n");
174fa4dfedcSDavid S. Miller return -ENODEV;
175fa4dfedcSDavid S. Miller }
176fa4dfedcSDavid S. Miller
md5_sparc64_mod_fini(void)177fa4dfedcSDavid S. Miller static void __exit md5_sparc64_mod_fini(void)
178fa4dfedcSDavid S. Miller {
179fa4dfedcSDavid S. Miller crypto_unregister_shash(&alg);
180fa4dfedcSDavid S. Miller }
181fa4dfedcSDavid S. Miller
182fa4dfedcSDavid S. Miller module_init(md5_sparc64_mod_init);
183fa4dfedcSDavid S. Miller module_exit(md5_sparc64_mod_fini);
184fa4dfedcSDavid S. Miller
185fa4dfedcSDavid S. Miller MODULE_LICENSE("GPL");
18697ef8ef5SMathias Krause MODULE_DESCRIPTION("MD5 Message Digest Algorithm, sparc64 md5 opcode accelerated");
187fa4dfedcSDavid S. Miller
1885d26a105SKees Cook MODULE_ALIAS_CRYPTO("md5");
189226f7ceaSDavid S. Miller
190226f7ceaSDavid S. Miller #include "crop_devid.c"
191