Create an EVP_PKEY holding a MAC key for HMAC, CMAC, Poly1305, or SipHash.

Synopsis

Declared in <openssl/evp.h>

EVP_PKEY*
EVP_PKEY_new_mac_key(
    int type,
    ENGINE* e,
    unsigned char const* key,
    int keylen);

Description

Prefer EVP_MAC / EVP_PKEY_new_raw_private_key_ex() for new code.

Return Value

New EVP_PKEY, or NULL on error.

Parameters

Name

Description

type

Key type NID (for example EVP_PKEY_HMAC).

e

Optional ENGINE implementing the MAC, or NULL.

key

Raw key bytes.

keylen

Length of key in bytes.

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