matterbridge/vendor/go.mau.fi/libsignal/keys/session/DerivedSecrets.go

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2022-01-30 15:27:37 -08:00
package session
// NewDerivedSecrets returns a new RootKey/ChainKey pair from 64 bytes of key material
// generated by the key derivation function.
func NewDerivedSecrets(keyMaterial []byte) *DerivedSecrets {
secrets := DerivedSecrets{
keyMaterial[:32],
keyMaterial[32:],
}
return &secrets
}
// DerivedSecrets is a structure for holding the derived secrets for the
// Root and Chain keys for a session.
type DerivedSecrets struct {
rootKey []byte
chainKey []byte
}
// RootKey returns the RootKey bytes.
func (d *DerivedSecrets) RootKey() []byte {
return d.rootKey
}
// ChainKey returns the ChainKey bytes.
func (d *DerivedSecrets) ChainKey() []byte {
return d.chainKey
}