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
 59extern const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE];
 60
 61extern const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE];
 62
 63extern const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE];
 64
 65extern const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE];
 66
 67struct sha256_state {
 68	u32 state[SHA256_DIGEST_SIZE / 4];
 69	u64 count;
 70	u8 buf[SHA256_BLOCK_SIZE];
 71};
 72
 73struct sha512_state {
 74	u64 state[SHA512_DIGEST_SIZE / 8];
 75	u64 count[2];
 76	u8 buf[SHA512_BLOCK_SIZE];
 77};
 78
 79struct shash_desc;
 80
 81extern int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
 82			      unsigned int len);
 83
 84extern int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,
 85			       unsigned int len, u8 *hash);
 86
 87extern int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
 88			      unsigned int len);
 89
 90extern 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
103static 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}
115void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
116void sha256_final(struct sha256_state *sctx, u8 *out);
117void sha256(const u8 *data, unsigned int len, u8 *out);
118
119static 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. */
132void sha224_final(struct sha256_state *sctx, u8 *out);
133
134#endif /* _CRYPTO_SHA2_H */