Select HKDF extract/expand mode on a key‐derivation EVP_PKEY_CTX.

Synopsis

Declared in <openssl/kdf.h>

int
EVP_PKEY_CTX_set_hkdf_mode(
    EVP_PKEY_CTX* ctx,
    int mode);

Return Value

1 on success, or 0 on error.

Parameters

Name

Description

ctx

HKDF derivation context.

mode

EVP_PKEY_HKDEF_MODE_EXTRACT_AND_EXPAND, EXTRACT_ONLY, or EXPAND_ONLY.

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