# Function crypto::hkdf::hkdf_expand [−] [src]

    pub fn hkdf_expand<D: Digest>(
        digest: D,
        prk: &[u8],
        info: &[u8],
        okm: &mut [u8]
    )

Execute the HKDF-Expand function. Applications MUST NOT use this for password hashing.

# Arguments

- digest - The digest function to use.
- prk - The pseudorandom key of at least digest.output_bytes() octets.
- info - The optional context and application specific information to use.
- okm - The output buffer to fill with the derived key value.

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