135 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Common values for SHA-2 algorithms4 */5 6#ifndef _CRYPTO_SHA2_H7#define _CRYPTO_SHA2_H8 9#include <linux/types.h>10 11#define SHA224_DIGEST_SIZE 2812#define SHA224_BLOCK_SIZE 6413 14#define SHA256_DIGEST_SIZE 3215#define SHA256_BLOCK_SIZE 6416 17#define SHA384_DIGEST_SIZE 4818#define SHA384_BLOCK_SIZE 12819 20#define SHA512_DIGEST_SIZE 6421#define SHA512_BLOCK_SIZE 12822 23#define SHA224_H0 0xc1059ed8UL24#define SHA224_H1 0x367cd507UL25#define SHA224_H2 0x3070dd17UL26#define SHA224_H3 0xf70e5939UL27#define SHA224_H4 0xffc00b31UL28#define SHA224_H5 0x68581511UL29#define SHA224_H6 0x64f98fa7UL30#define SHA224_H7 0xbefa4fa4UL31 32#define SHA256_H0 0x6a09e667UL33#define SHA256_H1 0xbb67ae85UL34#define SHA256_H2 0x3c6ef372UL35#define SHA256_H3 0xa54ff53aUL36#define SHA256_H4 0x510e527fUL37#define SHA256_H5 0x9b05688cUL38#define SHA256_H6 0x1f83d9abUL39#define SHA256_H7 0x5be0cd19UL40 41#define SHA384_H0 0xcbbb9d5dc1059ed8ULL42#define SHA384_H1 0x629a292a367cd507ULL43#define SHA384_H2 0x9159015a3070dd17ULL44#define SHA384_H3 0x152fecd8f70e5939ULL45#define SHA384_H4 0x67332667ffc00b31ULL46#define SHA384_H5 0x8eb44a8768581511ULL47#define SHA384_H6 0xdb0c2e0d64f98fa7ULL48#define SHA384_H7 0x47b5481dbefa4fa4ULL49 50#define SHA512_H0 0x6a09e667f3bcc908ULL51#define SHA512_H1 0xbb67ae8584caa73bULL52#define SHA512_H2 0x3c6ef372fe94f82bULL53#define SHA512_H3 0xa54ff53a5f1d36f1ULL54#define SHA512_H4 0x510e527fade682d1ULL55#define SHA512_H5 0x9b05688c2b3e6c1fULL56#define SHA512_H6 0x1f83d9abfb41bd6bULL57#define SHA512_H7 0x5be0cd19137e2179ULL58 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 to95 * have as little dependencies as possible so it can be used in the96 * kexec_file purgatory. In other cases you should generally use the97 * hash APIs from include/crypto/hash.h. Especially when hashing large98 * amounts of data as those APIs may be hw-accelerated.99 *100 * For details see lib/crypto/sha256.c101 */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 */135