diff options
Diffstat (limited to 'include/crypto/sha2.h')
| -rw-r--r-- | include/crypto/sha2.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/include/crypto/sha2.h b/include/crypto/sha2.h new file mode 100644 index 0000000000..b9e9281d76 --- /dev/null +++ b/include/crypto/sha2.h @@ -0,0 +1,134 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Common values for SHA-2 algorithms + */ + +#ifndef _CRYPTO_SHA2_H +#define _CRYPTO_SHA2_H + +#include <linux/types.h> + +#define SHA224_DIGEST_SIZE 28 +#define SHA224_BLOCK_SIZE 64 + +#define SHA256_DIGEST_SIZE 32 +#define SHA256_BLOCK_SIZE 64 + +#define SHA384_DIGEST_SIZE 48 +#define SHA384_BLOCK_SIZE 128 + +#define SHA512_DIGEST_SIZE 64 +#define SHA512_BLOCK_SIZE 128 + +#define SHA224_H0 0xc1059ed8UL +#define SHA224_H1 0x367cd507UL +#define SHA224_H2 0x3070dd17UL +#define SHA224_H3 0xf70e5939UL +#define SHA224_H4 0xffc00b31UL +#define SHA224_H5 0x68581511UL +#define SHA224_H6 0x64f98fa7UL +#define SHA224_H7 0xbefa4fa4UL + +#define SHA256_H0 0x6a09e667UL +#define SHA256_H1 0xbb67ae85UL +#define SHA256_H2 0x3c6ef372UL +#define SHA256_H3 0xa54ff53aUL +#define SHA256_H4 0x510e527fUL +#define SHA256_H5 0x9b05688cUL +#define SHA256_H6 0x1f83d9abUL +#define SHA256_H7 0x5be0cd19UL + +#define SHA384_H0 0xcbbb9d5dc1059ed8ULL +#define SHA384_H1 0x629a292a367cd507ULL +#define SHA384_H2 0x9159015a3070dd17ULL +#define SHA384_H3 0x152fecd8f70e5939ULL +#define SHA384_H4 0x67332667ffc00b31ULL +#define SHA384_H5 0x8eb44a8768581511ULL +#define SHA384_H6 0xdb0c2e0d64f98fa7ULL +#define SHA384_H7 0x47b5481dbefa4fa4ULL + +#define SHA512_H0 0x6a09e667f3bcc908ULL +#define SHA512_H1 0xbb67ae8584caa73bULL +#define SHA512_H2 0x3c6ef372fe94f82bULL +#define SHA512_H3 0xa54ff53a5f1d36f1ULL +#define SHA512_H4 0x510e527fade682d1ULL +#define SHA512_H5 0x9b05688c2b3e6c1fULL +#define SHA512_H6 0x1f83d9abfb41bd6bULL +#define SHA512_H7 0x5be0cd19137e2179ULL + +extern const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE]; + +extern const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE]; + +extern const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE]; + +extern const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE]; + +struct sha256_state { + u32 state[SHA256_DIGEST_SIZE / 4]; + u64 count; + u8 buf[SHA256_BLOCK_SIZE]; +}; + +struct sha512_state { + u64 state[SHA512_DIGEST_SIZE / 8]; + u64 count[2]; + u8 buf[SHA512_BLOCK_SIZE]; +}; + +struct shash_desc; + +extern int crypto_sha256_update(struct shash_desc *desc, const u8 *data, + unsigned int len); + +extern int crypto_sha256_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *hash); + +extern int crypto_sha512_update(struct shash_desc *desc, const u8 *data, + unsigned int len); + +extern int crypto_sha512_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *hash); + +/* + * Stand-alone implementation of the SHA256 algorithm. It is designed to + * have as little dependencies as possible so it can be used in the + * kexec_file purgatory. In other cases you should generally use the + * hash APIs from include/crypto/hash.h. Especially when hashing large + * amounts of data as those APIs may be hw-accelerated. + * + * For details see lib/crypto/sha256.c + */ + +static inline void sha256_init(struct sha256_state *sctx) +{ + sctx->state[0] = SHA256_H0; + sctx->state[1] = SHA256_H1; + sctx->state[2] = SHA256_H2; + sctx->state[3] = SHA256_H3; + sctx->state[4] = SHA256_H4; + sctx->state[5] = SHA256_H5; + sctx->state[6] = SHA256_H6; + sctx->state[7] = SHA256_H7; + sctx->count = 0; +} +void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len); +void sha256_final(struct sha256_state *sctx, u8 *out); +void sha256(const u8 *data, unsigned int len, u8 *out); + +static inline void sha224_init(struct sha256_state *sctx) +{ + sctx->state[0] = SHA224_H0; + sctx->state[1] = SHA224_H1; + sctx->state[2] = SHA224_H2; + sctx->state[3] = SHA224_H3; + sctx->state[4] = SHA224_H4; + sctx->state[5] = SHA224_H5; + sctx->state[6] = SHA224_H6; + sctx->state[7] = SHA224_H7; + sctx->count = 0; +} +/* Simply use sha256_update as it is equivalent to sha224_update. */ +void sha224_final(struct sha256_state *sctx, u8 *out); + +#endif /* _CRYPTO_SHA2_H */ |