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#ifndef HMAC_H
#define HMAC_H
#include "hash-method.h"
#include "sha1.h"
#include "sha2.h"
#define HMAC_MAX_CONTEXT_SIZE sizeof(struct sha512_ctx)
struct hmac_context_priv {
char ctx[HMAC_MAX_CONTEXT_SIZE];
char ctxo[HMAC_MAX_CONTEXT_SIZE];
const struct hash_method *hash;
};
struct hmac_context {
union {
struct hmac_context_priv priv;
uint64_t padding_requirement;
} u;
};
void hmac_init(struct hmac_context *ctx, const unsigned char *key,
size_t key_len, const struct hash_method *meth);
void hmac_final(struct hmac_context *ctx, unsigned char *digest);
static inline void
hmac_update(struct hmac_context *_ctx, const void *data, size_t size)
{
struct hmac_context_priv *ctx = &_ctx->u.priv;
ctx->hash->loop(ctx->ctx, data, size);
}
buffer_t *t_hmac_data(const struct hash_method *meth,
const unsigned char *key, size_t key_len,
const void *data, size_t data_len);
buffer_t *t_hmac_buffer(const struct hash_method *meth,
const unsigned char *key, size_t key_len,
const buffer_t *data);
buffer_t *t_hmac_str(const struct hash_method *meth,
const unsigned char *key, size_t key_len,
const char *data);
void hmac_hkdf(const struct hash_method *method,
const unsigned char *salt, size_t salt_len,
const unsigned char *ikm, size_t ikm_len,
const unsigned char *info, size_t info_len,
buffer_t *okm_r, size_t okm_len);
static inline buffer_t *
t_hmac_hkdf(const struct hash_method *method,
const unsigned char *salt, size_t salt_len,
const unsigned char *ikm, size_t ikm_len,
const unsigned char *info, size_t info_len,
size_t okm_len)
{
buffer_t *okm_buffer = t_buffer_create(okm_len);
hmac_hkdf(method, salt, salt_len, ikm, ikm_len, info, info_len,
okm_buffer, okm_len);
return okm_buffer;
}
#endif