1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* SHA-512 code by Jean-Luc Cooke <jlcooke@certainkey.com>
3  *
4  * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
5  * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
6  * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
7  */
8 #include <crypto/internal/hash.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/mm.h>
12 #include <linux/init.h>
13 #include <linux/crypto.h>
14 #include <linux/types.h>
15 #include <crypto/sha2.h>
16 #include <crypto/sha512_base.h>
17 #include <linux/percpu.h>
18 #include <asm/byteorder.h>
19 #include <asm/unaligned.h>
20 
21 const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE] = {
22 	0x38, 0xb0, 0x60, 0xa7, 0x51, 0xac, 0x96, 0x38,
23 	0x4c, 0xd9, 0x32, 0x7e, 0xb1, 0xb1, 0xe3, 0x6a,
24 	0x21, 0xfd, 0xb7, 0x11, 0x14, 0xbe, 0x07, 0x43,
25 	0x4c, 0x0c, 0xc7, 0xbf, 0x63, 0xf6, 0xe1, 0xda,
26 	0x27, 0x4e, 0xde, 0xbf, 0xe7, 0x6f, 0x65, 0xfb,
27 	0xd5, 0x1a, 0xd2, 0xf1, 0x48, 0x98, 0xb9, 0x5b
28 };
29 EXPORT_SYMBOL_GPL(sha384_zero_message_hash);
30 
31 const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE] = {
32 	0xcf, 0x83, 0xe1, 0x35, 0x7e, 0xef, 0xb8, 0xbd,
33 	0xf1, 0x54, 0x28, 0x50, 0xd6, 0x6d, 0x80, 0x07,
34 	0xd6, 0x20, 0xe4, 0x05, 0x0b, 0x57, 0x15, 0xdc,
35 	0x83, 0xf4, 0xa9, 0x21, 0xd3, 0x6c, 0xe9, 0xce,
36 	0x47, 0xd0, 0xd1, 0x3c, 0x5d, 0x85, 0xf2, 0xb0,
37 	0xff, 0x83, 0x18, 0xd2, 0x87, 0x7e, 0xec, 0x2f,
38 	0x63, 0xb9, 0x31, 0xbd, 0x47, 0x41, 0x7a, 0x81,
39 	0xa5, 0x38, 0x32, 0x7a, 0xf9, 0x27, 0xda, 0x3e
40 };
41 EXPORT_SYMBOL_GPL(sha512_zero_message_hash);
42 
Ch(u64 x,u64 y,u64 z)43 static inline u64 Ch(u64 x, u64 y, u64 z)
44 {
45         return z ^ (x & (y ^ z));
46 }
47 
Maj(u64 x,u64 y,u64 z)48 static inline u64 Maj(u64 x, u64 y, u64 z)
49 {
50         return (x & y) | (z & (x | y));
51 }
52 
53 static const u64 sha512_K[80] = {
54         0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
55         0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
56         0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
57         0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
58         0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
59         0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
60         0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
61         0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
62         0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
63         0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
64         0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
65         0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
66         0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
67         0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
68         0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
69         0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
70         0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
71         0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
72         0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
73         0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
74         0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
75         0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
76         0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
77         0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
78         0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
79         0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
80         0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
81 };
82 
83 #define e0(x)       (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39))
84 #define e1(x)       (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41))
85 #define s0(x)       (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
86 #define s1(x)       (ror64(x,19) ^ ror64(x,61) ^ (x >> 6))
87 
LOAD_OP(int I,u64 * W,const u8 * input)88 static inline void LOAD_OP(int I, u64 *W, const u8 *input)
89 {
90 	W[I] = get_unaligned_be64((__u64 *)input + I);
91 }
92 
BLEND_OP(int I,u64 * W)93 static inline void BLEND_OP(int I, u64 *W)
94 {
95 	W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
96 }
97 
98 static void
sha512_transform(u64 * state,const u8 * input)99 sha512_transform(u64 *state, const u8 *input)
100 {
101 	u64 a, b, c, d, e, f, g, h, t1, t2;
102 
103 	int i;
104 	u64 W[16];
105 
106 	/* load the state into our registers */
107 	a=state[0];   b=state[1];   c=state[2];   d=state[3];
108 	e=state[4];   f=state[5];   g=state[6];   h=state[7];
109 
110 	/* now iterate */
111 	for (i=0; i<80; i+=8) {
112 		if (!(i & 8)) {
113 			int j;
114 
115 			if (i < 16) {
116 				/* load the input */
117 				for (j = 0; j < 16; j++)
118 					LOAD_OP(i + j, W, input);
119 			} else {
120 				for (j = 0; j < 16; j++) {
121 					BLEND_OP(i + j, W);
122 				}
123 			}
124 		}
125 
126 		t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i  ] + W[(i & 15)];
127 		t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
128 		t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1];
129 		t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
130 		t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2];
131 		t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
132 		t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3];
133 		t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
134 		t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4];
135 		t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
136 		t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5];
137 		t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
138 		t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6];
139 		t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
140 		t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7];
141 		t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;
142 	}
143 
144 	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
145 	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
146 }
147 
sha512_generic_block_fn(struct sha512_state * sst,u8 const * src,int blocks)148 static void sha512_generic_block_fn(struct sha512_state *sst, u8 const *src,
149 				    int blocks)
150 {
151 	while (blocks--) {
152 		sha512_transform(sst->state, src);
153 		src += SHA512_BLOCK_SIZE;
154 	}
155 }
156 
crypto_sha512_update(struct shash_desc * desc,const u8 * data,unsigned int len)157 int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
158 			unsigned int len)
159 {
160 	return sha512_base_do_update(desc, data, len, sha512_generic_block_fn);
161 }
162 EXPORT_SYMBOL(crypto_sha512_update);
163 
sha512_final(struct shash_desc * desc,u8 * hash)164 static int sha512_final(struct shash_desc *desc, u8 *hash)
165 {
166 	sha512_base_do_finalize(desc, sha512_generic_block_fn);
167 	return sha512_base_finish(desc, hash);
168 }
169 
crypto_sha512_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * hash)170 int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
171 			unsigned int len, u8 *hash)
172 {
173 	sha512_base_do_update(desc, data, len, sha512_generic_block_fn);
174 	return sha512_final(desc, hash);
175 }
176 EXPORT_SYMBOL(crypto_sha512_finup);
177 
178 static struct shash_alg sha512_algs[2] = { {
179 	.digestsize	=	SHA512_DIGEST_SIZE,
180 	.init		=	sha512_base_init,
181 	.update		=	crypto_sha512_update,
182 	.final		=	sha512_final,
183 	.finup		=	crypto_sha512_finup,
184 	.descsize	=	sizeof(struct sha512_state),
185 	.base		=	{
186 		.cra_name	=	"sha512",
187 		.cra_driver_name =	"sha512-generic",
188 		.cra_priority	=	100,
189 		.cra_blocksize	=	SHA512_BLOCK_SIZE,
190 		.cra_module	=	THIS_MODULE,
191 	}
192 }, {
193 	.digestsize	=	SHA384_DIGEST_SIZE,
194 	.init		=	sha384_base_init,
195 	.update		=	crypto_sha512_update,
196 	.final		=	sha512_final,
197 	.finup		=	crypto_sha512_finup,
198 	.descsize	=	sizeof(struct sha512_state),
199 	.base		=	{
200 		.cra_name	=	"sha384",
201 		.cra_driver_name =	"sha384-generic",
202 		.cra_priority	=	100,
203 		.cra_blocksize	=	SHA384_BLOCK_SIZE,
204 		.cra_module	=	THIS_MODULE,
205 	}
206 } };
207 
sha512_generic_mod_init(void)208 static int __init sha512_generic_mod_init(void)
209 {
210 	return crypto_register_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
211 }
212 
sha512_generic_mod_fini(void)213 static void __exit sha512_generic_mod_fini(void)
214 {
215 	crypto_unregister_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
216 }
217 
218 subsys_initcall(sha512_generic_mod_init);
219 module_exit(sha512_generic_mod_fini);
220 
221 MODULE_LICENSE("GPL");
222 MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
223 
224 MODULE_ALIAS_CRYPTO("sha384");
225 MODULE_ALIAS_CRYPTO("sha384-generic");
226 MODULE_ALIAS_CRYPTO("sha512");
227 MODULE_ALIAS_CRYPTO("sha512-generic");
228