diff options
Diffstat (limited to 'c_src/include/crypto/hash.h')
-rw-r--r-- | c_src/include/crypto/hash.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/c_src/include/crypto/hash.h b/c_src/include/crypto/hash.h new file mode 100644 index 00000000..a74f3618 --- /dev/null +++ b/c_src/include/crypto/hash.h @@ -0,0 +1,104 @@ +/* + * Hash: Hash algorithms under the crypto API + * + * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#ifndef _CRYPTO_HASH_H +#define _CRYPTO_HASH_H + +#include <linux/crypto.h> + +struct shash_desc; + +struct shash_alg { + int (*init)(struct shash_desc *desc); + int (*update)(struct shash_desc *desc, const u8 *data, unsigned len); + int (*final)(struct shash_desc *desc, u8 *out); + int (*finup)(struct shash_desc *desc, const u8 *data, + unsigned len, u8 *out); + int (*digest)(struct shash_desc *desc, const u8 *data, + unsigned len, u8 *out); + + unsigned descsize; + unsigned digestsize; + struct crypto_alg base; +}; + +int crypto_register_shash(struct shash_alg *alg); + +struct crypto_shash { + unsigned descsize; + struct crypto_tfm base; +}; + +struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, + u32 mask); + +static inline void crypto_free_shash(struct crypto_shash *tfm) +{ + kfree(tfm); +} + +static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm) +{ + return container_of(tfm->base.alg, struct shash_alg, base); +} + +static inline unsigned crypto_shash_digestsize(struct crypto_shash *tfm) +{ + return crypto_shash_alg(tfm)->digestsize; +} + +static inline unsigned crypto_shash_descsize(struct crypto_shash *tfm) +{ + return tfm->descsize; +} + +struct shash_desc { + struct crypto_shash *tfm; + u32 flags; + + void *ctx[] CRYPTO_MINALIGN_ATTR; +}; + +#define SHASH_DESC_ON_STACK(shash, tfm) \ + char __##shash##_desc[sizeof(struct shash_desc) + \ + crypto_shash_descsize(tfm)] CRYPTO_MINALIGN_ATTR; \ + struct shash_desc *shash = (struct shash_desc *)__##shash##_desc + +static inline int crypto_shash_init(struct shash_desc *desc) +{ + return crypto_shash_alg(desc->tfm)->init(desc); +} + +static inline int crypto_shash_update(struct shash_desc *desc, + const u8 *data, unsigned len) +{ + return crypto_shash_alg(desc->tfm)->update(desc, data, len); +} + +static inline int crypto_shash_final(struct shash_desc *desc, u8 *out) +{ + return crypto_shash_alg(desc->tfm)->final(desc, out); +} + +static inline int crypto_shash_finup(struct shash_desc *desc, const u8 *data, + unsigned len, u8 *out) +{ + return crypto_shash_alg(desc->tfm)->finup(desc, data, len, out); +} + +static inline int crypto_shash_digest(struct shash_desc *desc, const u8 *data, + unsigned len, u8 *out) +{ + return crypto_shash_alg(desc->tfm)->digest(desc, data, len, out); +} + +#endif /* _CRYPTO_HASH_H */ |