hkdf.h

Go to the documentation of this file.

#ifndef HKDF_HKDF_H
#define HKDF_HKDF_H
 
#include "crypto/symmetric/hash/hash/hmac.h"


#define HKDF_PRK SHA256_DIGEST

#define HKDF_PRK_384 SHA384_DIGEST

typedef struct {
  const char* label;     
  usz         label_len; 
  wired_span  ctx;       
} hkdf_label;

void hkdf_extract(wired_span salt, wired_span ikm, u8 prk[HKDF_PRK]);

int hkdf_expand(const u8 prk[HKDF_PRK], wired_span info, wired_mspan okm);

int hkdf_expand_label(
    const u8 prk[HKDF_PRK], const hkdf_label* l, wired_mspan okm);

void hkdf_extract_384(wired_span salt, wired_span ikm, u8 prk[HKDF_PRK_384]);

int hkdf_expand_384(
    const u8 prk[HKDF_PRK_384], wired_span info, wired_mspan okm);

int hkdf_expand_label_384(
    const u8 prk[HKDF_PRK_384], const hkdf_label* l, wired_mspan okm);
 
#endif