@interface MessageProtection.HKDF : NSObject + (id)deriveKeyWith:(id)a0 salt:(id)a1 outputSize:(long long)a2; - (id)init; @end
@interface MessageProtection.HKDF : NSObject + (id)deriveKeyWith:(id)a0 salt:(id)a1 outputSize:(long long)a2; - (id)init; @end