Key Agreement

🔑 What is Key Agreement?

Key Agreement (ECDH) is used to securely generate a shared secret between two parties. This secret is then used for key derivation and encryption.

Important

Curves of a private and a public keys supposed to be of the same type

Supported Curves

• P256
• P384
• P521
• Curve25519

🚀 Generate a Shared Secret

let privateKey = P256.KeyAgreement.PrivateKey()
let publicKey = privateKey.publicKey

let sharedSecret = try M_AES_GCM_HKDF.getSharedSecret(privateKey: privateKey, publicKey: publicKey)

Also it can work with the SecKey that has under known Curves

let privateKey: SecKey
let publicKey: SecKey
let sharedSecret = try M_AES_GCM_HKDF.getSharedSecret(privateKey: privateKey, publicKey: publicKey)