Read an octet‐string parameter from a key by OSSL_PKEY_PARAM name.

Synopsis

Declared in <openssl/evp.h>

int
EVP_PKEY_get_octet_string_param(
    EVP_PKEY const* pkey,
    char const* key_name,
    unsigned char* buf,
    size_t max_buf_sz,
    size_t* out_sz);

Return Value

1 on success, or 0 on error.

Parameters

Name

Description

pkey

Key to query.

key_name

Parameter name (for example OSSL_PKEY_PARAM_PUB_KEY).

buf

Destination buffer, or NULL to only query the required size.

max_buf_sz

Capacity of buf in bytes.

out_sz

Receives the parameter length in bytes.

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