1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Common values for SHA-2 algorithms
4  */
5 
6 #ifndef _CRYPTO_SHA2_H
7 #define _CRYPTO_SHA2_H
8 
9 #include <linux/types.h>
10 
11 #define SHA224_DIGEST_SIZE	28
12 #define SHA224_BLOCK_SIZE	64
13 
14 #define SHA256_DIGEST_SIZE      32
15 #define SHA256_BLOCK_SIZE       64
16 
17 #define SHA384_DIGEST_SIZE      48
18 #define SHA384_BLOCK_SIZE       128
19 
20 #define SHA512_DIGEST_SIZE      64
21 #define SHA512_BLOCK_SIZE       128
22 
23 #define SHA224_H0	0xc1059ed8UL
24 #define SHA224_H1	0x367cd507UL
25 #define SHA224_H2	0x3070dd17UL
26 #define SHA224_H3	0xf70e5939UL
27 #define SHA224_H4	0xffc00b31UL
28 #define SHA224_H5	0x68581511UL
29 #define SHA224_H6	0x64f98fa7UL
30 #define SHA224_H7	0xbefa4fa4UL
31 
32 #define SHA256_H0	0x6a09e667UL
33 #define SHA256_H1	0xbb67ae85UL
34 #define SHA256_H2	0x3c6ef372UL
35 #define SHA256_H3	0xa54ff53aUL
36 #define SHA256_H4	0x510e527fUL
37 #define SHA256_H5	0x9b05688cUL
38 #define SHA256_H6	0x1f83d9abUL
39 #define SHA256_H7	0x5be0cd19UL
40 
41 #define SHA384_H0	0xcbbb9d5dc1059ed8ULL
42 #define SHA384_H1	0x629a292a367cd507ULL
43 #define SHA384_H2	0x9159015a3070dd17ULL
44 #define SHA384_H3	0x152fecd8f70e5939ULL
45 #define SHA384_H4	0x67332667ffc00b31ULL
46 #define SHA384_H5	0x8eb44a8768581511ULL
47 #define SHA384_H6	0xdb0c2e0d64f98fa7ULL
48 #define SHA384_H7	0x47b5481dbefa4fa4ULL
49 
50 #define SHA512_H0	0x6a09e667f3bcc908ULL
51 #define SHA512_H1	0xbb67ae8584caa73bULL
52 #define SHA512_H2	0x3c6ef372fe94f82bULL
53 #define SHA512_H3	0xa54ff53a5f1d36f1ULL
54 #define SHA512_H4	0x510e527fade682d1ULL
55 #define SHA512_H5	0x9b05688c2b3e6c1fULL
56 #define SHA512_H6	0x1f83d9abfb41bd6bULL
57 #define SHA512_H7	0x5be0cd19137e2179ULL
58 
59 extern const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE];
60 
61 extern const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE];
62 
63 extern const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE];
64 
65 extern const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE];
66 
67 struct sha256_state {
68 	u32 state[SHA256_DIGEST_SIZE / 4];
69 	u64 count;
70 	u8 buf[SHA256_BLOCK_SIZE];
71 };
72 
73 struct sha512_state {
74 	u64 state[SHA512_DIGEST_SIZE / 8];
75 	u64 count[2];
76 	u8 buf[SHA512_BLOCK_SIZE];
77 };
78 
79 struct shash_desc;
80 
81 extern int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
82 			      unsigned int len);
83 
84 extern int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,
85 			       unsigned int len, u8 *hash);
86 
87 extern int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
88 			      unsigned int len);
89 
90 extern int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
91 			       unsigned int len, u8 *hash);
92 
93 /*
94  * Stand-alone implementation of the SHA256 algorithm. It is designed to
95  * have as little dependencies as possible so it can be used in the
96  * kexec_file purgatory. In other cases you should generally use the
97  * hash APIs from include/crypto/hash.h. Especially when hashing large
98  * amounts of data as those APIs may be hw-accelerated.
99  *
100  * For details see lib/crypto/sha256.c
101  */
102 
sha256_init(struct sha256_state * sctx)103 static inline void sha256_init(struct sha256_state *sctx)
104 {
105 	sctx->state[0] = SHA256_H0;
106 	sctx->state[1] = SHA256_H1;
107 	sctx->state[2] = SHA256_H2;
108 	sctx->state[3] = SHA256_H3;
109 	sctx->state[4] = SHA256_H4;
110 	sctx->state[5] = SHA256_H5;
111 	sctx->state[6] = SHA256_H6;
112 	sctx->state[7] = SHA256_H7;
113 	sctx->count = 0;
114 }
115 void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
116 void sha256_final(struct sha256_state *sctx, u8 *out);
117 void sha256(const u8 *data, unsigned int len, u8 *out);
118 
sha224_init(struct sha256_state * sctx)119 static inline void sha224_init(struct sha256_state *sctx)
120 {
121 	sctx->state[0] = SHA224_H0;
122 	sctx->state[1] = SHA224_H1;
123 	sctx->state[2] = SHA224_H2;
124 	sctx->state[3] = SHA224_H3;
125 	sctx->state[4] = SHA224_H4;
126 	sctx->state[5] = SHA224_H5;
127 	sctx->state[6] = SHA224_H6;
128 	sctx->state[7] = SHA224_H7;
129 	sctx->count = 0;
130 }
131 /* Simply use sha256_update as it is equivalent to sha224_update. */
132 void sha224_final(struct sha256_state *sctx, u8 *out);
133 
134 #endif /* _CRYPTO_SHA2_H */
135