Struct KeyMethodV2 

pub struct KeyMethodV2 {
    pub pre_master: [u8; 48],
    pub random1: [u8; 32],
    pub random2: [u8; 32],
    pub options: String,
    pub username: Option<String>,
    pub password: Option<String>,
    pub peer_info: Option<String>,
}

Key method v2 data (exchanged during TLS handshake)

Fields

pre_master: [u8; 48]

Pre-master secret (48 bytes)

random1: [u8; 32]

Random data 1 (32 bytes) - used as EKM context and PRF seed

random2: [u8; 32]

Random data 2 (32 bytes) - used as additional PRF seed

options: String

Options string

username: Option<String>

Username (if using auth)

password: Option<String>

Password (if using auth)

peer_info: Option<String>

Peer info

Implementations

impl KeyMethodV2

pub fn parse(data: &[u8]) -> Result<Self>

Parse key method v2 data from bytes (received from TLS plaintext)

Format (OpenVPN key_source + metadata):

• 4 bytes: literal 0
• 1 byte: key method (must be 2)
• 48 bytes: pre-master secret
• 32 bytes: random1
• 32 bytes: random2
• 2 bytes + N bytes: options string (length-prefixed, null-terminated)
• 2 bytes + N bytes: username (length-prefixed, optional)
• 2 bytes + N bytes: password (length-prefixed, optional)
• 2 bytes + N bytes: peer_info (length-prefixed, optional)

pub fn parse_from_server(data: &[u8]) -> Result<Self>

Parse key method v2 data from server (received from TLS plaintext)

The server format omits the pre_master secret, only sending:

• 4 bytes: literal 0
• 1 byte: key method (must be 2)
• 32 bytes: random1
• 32 bytes: random2
• 2 bytes + N bytes: options string (length-prefixed, null-terminated)

pub fn encode(&self, is_server: bool) -> Vec<u8>

Encode to bytes (OpenVPN key_method_v2 wire format)

When is_server is true (server writing its response), pre_master is NOT included in the key source material – only random1 and random2. When is_server is false (client writing), pre_master IS included. This matches the OpenVPN key_source2_randomize_write asymmetry.

Trait Implementations

impl Clone for KeyMethodV2

fn clone(&self) -> KeyMethodV2

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for KeyMethodV2

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.