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#ifndef HASH_METHOD_H
#define HASH_METHOD_H
#include "buffer.h"
struct hash_method {
const char *name;
/* Block size for the algorithm */
unsigned int block_size;
/* Number of bytes that must be allocated for context */
unsigned int context_size;
/* Number of bytes that must be allocated for result()'s digest */
unsigned int digest_size;
void (*init)(void *context);
void (*loop)(void *context, const void *data, size_t size);
void (*result)(void *context, unsigned char *digest_r);
};
const struct hash_method *hash_method_lookup(const char *name);
/* NULL-terminated list of all hash methods */
extern const struct hash_method *hash_methods[];
void hash_method_get_digest(const struct hash_method *meth,
const void *data, size_t data_len,
unsigned char *result_r);
/** Simple datastack helpers for digesting (hashing)
* USAGE:
buffer_t *result = t_hash_str(hash_method_lookup("sha256"), "hello world");
const char *hex = binary_to_hex(result->data, result->used);
*/
buffer_t *t_hash_data(const struct hash_method *meth,
const void *data, size_t data_len);
static inline
buffer_t *t_hash_buffer(const struct hash_method *meth,
const buffer_t *data)
{
return t_hash_data(meth, data->data, data->used);
}
static inline
buffer_t *t_hash_str(const struct hash_method *meth,
const char *data)
{
return t_hash_data(meth, data, strlen(data));
}
#endif
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