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27 #ifndef MBEDTLS_HKDF_H
28 #define MBEDTLS_HKDF_H
30 #if !defined(MBEDTLS_CONFIG_FILE)
33 #include MBEDTLS_CONFIG_FILE
42 #define MBEDTLS_ERR_HKDF_BAD_INPUT_DATA -0x5F80
74 size_t salt_len,
const unsigned char *ikm,
size_t ikm_len,
75 const unsigned char *info,
size_t info_len,
76 unsigned char *okm,
size_t okm_len );
103 const unsigned char *salt,
size_t salt_len,
104 const unsigned char *ikm,
size_t ikm_len,
105 unsigned char *prk );
134 size_t prk_len,
const unsigned char *info,
135 size_t info_len,
unsigned char *okm,
size_t okm_len );
This file contains the generic message-digest wrapper.
int mbedtls_hkdf_expand(const mbedtls_md_info_t *md, const unsigned char *prk, size_t prk_len, const unsigned char *info, size_t info_len, unsigned char *okm, size_t okm_len)
Expand the supplied prk into several additional pseudorandom keys, which is the output of the HKDF.
int mbedtls_hkdf(const mbedtls_md_info_t *md, const unsigned char *salt, size_t salt_len, const unsigned char *ikm, size_t ikm_len, const unsigned char *info, size_t info_len, unsigned char *okm, size_t okm_len)
This is the HMAC-based Extract-and-Expand Key Derivation Function (HKDF).
struct mbedtls_md_info_t mbedtls_md_info_t
Configuration options (set of defines)
int mbedtls_hkdf_extract(const mbedtls_md_info_t *md, const unsigned char *salt, size_t salt_len, const unsigned char *ikm, size_t ikm_len, unsigned char *prk)
Take the input keying material ikm and extract from it a fixed-length pseudorandom key prk.