Krb5 Bindings

krb5.cr

@[Link("krb5")]
lib LibKRB

  fun krb5_init_context(buff : UInt8*) : UInt32
  fun krb5_free_context(buff : UInt8*) : Void


end

class Krb5

  def initialize
    ctx = Pointer(UInt8)
    ret  = LibKRB.krb5_init_context(ctx)
    raise "krb5_init_context() failed" if ret == 0
  end



end


puts Krb5.new

krb5.rb

module FFI::Krb5
    extend FFI::Library
    ffi_lib "krb5"

    attach_function :krb5_init_context, [:buffer_out], :uint
    attach_function :krb5_free_context, [:pointer], :void
end

## What you pass to krb5_init_context is really a pointer to a pointer. You
## can now use that this way:

buf = FFI::Buffer.new(:pointer)
res = FFI::Krb5.krb5_init_context(buf)
puts res