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 */