EVP_PKEY_CTX_set_ecdh_cofactor

Set whether ECDH key agreement multiplies by the curve cofactor.

Synopsis

Declared in <openssl/ec.h>

int
EVP_PKEY_CTX_set_ecdh_cofactor_mode(
    EVP_PKEY_CTX* ctx,
    int cofactor_mode);

1 on success, or a negative value on failure.

Name

Description

ctx

Key context configured for ECDH.

cofactor_mode

1 to enable cofactor ECDH, 0 to disable, or ‐1 to reset to the default.

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