1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Common values for SHA algorithms
4 */
5
6 #ifndef _CRYPTO_SHA_H
7 #define _CRYPTO_SHA_H
8
9 #include <linux/types.h>
10
11 #define SHA1_DIGEST_SIZE 20
12 #define SHA1_BLOCK_SIZE 64
13
14 #define SHA224_DIGEST_SIZE 28
15 #define SHA224_BLOCK_SIZE 64
16
17 #define SHA256_DIGEST_SIZE 32
18 #define SHA256_BLOCK_SIZE 64
19
20 #define SHA384_DIGEST_SIZE 48
21 #define SHA384_BLOCK_SIZE 128
22
23 #define SHA512_DIGEST_SIZE 64
24 #define SHA512_BLOCK_SIZE 128
25
26 #define SHA1_H0 0x67452301UL
27 #define SHA1_H1 0xefcdab89UL
28 #define SHA1_H2 0x98badcfeUL
29 #define SHA1_H3 0x10325476UL
30 #define SHA1_H4 0xc3d2e1f0UL
31
32 #define SHA224_H0 0xc1059ed8UL
33 #define SHA224_H1 0x367cd507UL
34 #define SHA224_H2 0x3070dd17UL
35 #define SHA224_H3 0xf70e5939UL
36 #define SHA224_H4 0xffc00b31UL
37 #define SHA224_H5 0x68581511UL
38 #define SHA224_H6 0x64f98fa7UL
39 #define SHA224_H7 0xbefa4fa4UL
40
41 #define SHA256_H0 0x6a09e667UL
42 #define SHA256_H1 0xbb67ae85UL
43 #define SHA256_H2 0x3c6ef372UL
44 #define SHA256_H3 0xa54ff53aUL
45 #define SHA256_H4 0x510e527fUL
46 #define SHA256_H5 0x9b05688cUL
47 #define SHA256_H6 0x1f83d9abUL
48 #define SHA256_H7 0x5be0cd19UL
49
50 #define SHA384_H0 0xcbbb9d5dc1059ed8ULL
51 #define SHA384_H1 0x629a292a367cd507ULL
52 #define SHA384_H2 0x9159015a3070dd17ULL
53 #define SHA384_H3 0x152fecd8f70e5939ULL
54 #define SHA384_H4 0x67332667ffc00b31ULL
55 #define SHA384_H5 0x8eb44a8768581511ULL
56 #define SHA384_H6 0xdb0c2e0d64f98fa7ULL
57 #define SHA384_H7 0x47b5481dbefa4fa4ULL
58
59 #define SHA512_H0 0x6a09e667f3bcc908ULL
60 #define SHA512_H1 0xbb67ae8584caa73bULL
61 #define SHA512_H2 0x3c6ef372fe94f82bULL
62 #define SHA512_H3 0xa54ff53a5f1d36f1ULL
63 #define SHA512_H4 0x510e527fade682d1ULL
64 #define SHA512_H5 0x9b05688c2b3e6c1fULL
65 #define SHA512_H6 0x1f83d9abfb41bd6bULL
66 #define SHA512_H7 0x5be0cd19137e2179ULL
67
68 extern const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE];
69
70 extern const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE];
71
72 extern const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE];
73
74 extern const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE];
75
76 extern const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE];
77
78 struct sha1_state {
79 u32 state[SHA1_DIGEST_SIZE / 4];
80 u64 count;
81 u8 buffer[SHA1_BLOCK_SIZE];
82 };
83
84 struct sha256_state {
85 u32 state[SHA256_DIGEST_SIZE / 4];
86 u64 count;
87 u8 buf[SHA256_BLOCK_SIZE];
88 };
89
90 struct sha512_state {
91 u64 state[SHA512_DIGEST_SIZE / 8];
92 u64 count[2];
93 u8 buf[SHA512_BLOCK_SIZE];
94 };
95
96 struct shash_desc;
97
98 extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
99 unsigned int len);
100
101 extern int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
102 unsigned int len, u8 *hash);
103
104 extern int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
105 unsigned int len);
106
107 extern int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,
108 unsigned int len, u8 *hash);
109
110 extern int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
111 unsigned int len);
112
113 extern int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
114 unsigned int len, u8 *hash);
115
116 /*
117 * An implementation of SHA-1's compression function. Don't use in new code!
118 * You shouldn't be using SHA-1, and even if you *have* to use SHA-1, this isn't
119 * the correct way to hash something with SHA-1 (use crypto_shash instead).
120 */
121 #define SHA1_DIGEST_WORDS (SHA1_DIGEST_SIZE / 4)
122 #define SHA1_WORKSPACE_WORDS 16
123 void sha1_init(__u32 *buf);
124 void sha1_transform(__u32 *digest, const char *data, __u32 *W);
125
126 /*
127 * Stand-alone implementation of the SHA256 algorithm. It is designed to
128 * have as little dependencies as possible so it can be used in the
129 * kexec_file purgatory. In other cases you should generally use the
130 * hash APIs from include/crypto/hash.h. Especially when hashing large
131 * amounts of data as those APIs may be hw-accelerated.
132 *
133 * For details see lib/crypto/sha256.c
134 */
135
sha256_init(struct sha256_state * sctx)136 static inline void sha256_init(struct sha256_state *sctx)
137 {
138 sctx->state[0] = SHA256_H0;
139 sctx->state[1] = SHA256_H1;
140 sctx->state[2] = SHA256_H2;
141 sctx->state[3] = SHA256_H3;
142 sctx->state[4] = SHA256_H4;
143 sctx->state[5] = SHA256_H5;
144 sctx->state[6] = SHA256_H6;
145 sctx->state[7] = SHA256_H7;
146 sctx->count = 0;
147 }
148 void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
149 void sha256_final(struct sha256_state *sctx, u8 *out);
150 void sha256(const u8 *data, unsigned int len, u8 *out);
151
sha224_init(struct sha256_state * sctx)152 static inline void sha224_init(struct sha256_state *sctx)
153 {
154 sctx->state[0] = SHA224_H0;
155 sctx->state[1] = SHA224_H1;
156 sctx->state[2] = SHA224_H2;
157 sctx->state[3] = SHA224_H3;
158 sctx->state[4] = SHA224_H4;
159 sctx->state[5] = SHA224_H5;
160 sctx->state[6] = SHA224_H6;
161 sctx->state[7] = SHA224_H7;
162 sctx->count = 0;
163 }
164 void sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
165 void sha224_final(struct sha256_state *sctx, u8 *out);
166
167 #endif
168
