common, crypto: add ICAP functions

1 files changed, 91 insertions, 0 deletions

diff --git a/common/icap_test.go b/common/icap_test.go
new file mode 100644
index 000000000..6306686d1
--- /dev/null
+++ b/common/icap_test.go
@@ -0,0 +1,91 @@
+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package common
+
+import "testing"
+
+/* More test vectors:
+https://github.com/ethereum/web3.js/blob/master/test/iban.fromAddress.js
+https://github.com/ethereum/web3.js/blob/master/test/iban.toAddress.js
+https://github.com/ethereum/web3.js/blob/master/test/iban.isValid.js
+https://github.com/ethereum/libethereum/blob/develop/test/libethcore/icap.cpp
+*/
+
+type icapTest struct {
+	name string
+	addr string
+	icap string
+}
+
+var icapOKTests = []icapTest{
+	{"Direct1", "0x52dc504a422f0e2a9e7632a34a50f1a82f8224c7", "XE499OG1EH8ZZI0KXC6N83EKGT1BM97P2O7"},
+	{"Direct2", "0x11c5496aee77c1ba1f0854206a26dda82a81d6d8", "XE1222Q908LN1QBBU6XUQSO1OHWJIOS46OO"},
+	{"DirectZeroPrefix", "0x00c5496aee77c1ba1f0854206a26dda82a81d6d8", "XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS"},
+	{"DirectDoubleZeroPrefix", "0x0000a5327eab78357cbf2ae8f3d49fd9d90c7d22", "XE0600DQK33XDTYUCRI0KYM5ELAKXDWWF6"},
+}
+
+var icapInvalidTests = []icapTest{
+	{"DirectInvalidCheckSum", "", "XE7438O073KYGTWWZN0F2WZ0R8PX5ZPPZS"},
+	{"DirectInvalidCountryCode", "", "XD7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS"},
+	{"DirectInvalidLength36", "", "XE499OG1EH8ZZI0KXC6N83EKGT1BM97P2O77"},
+	{"DirectInvalidLength33", "", "XE499OG1EH8ZZI0KXC6N83EKGT1BM97P2"},
+
+	{"IndirectInvalidCheckSum", "", "XE35ETHXREGGOPHERSSS"},
+	{"IndirectInvalidAssetIdentifier", "", "XE34ETHXREGGOPHERSSS"},
+	{"IndirectInvalidLength19", "", "XE34ETHXREGGOPHERSS"},
+	{"IndirectInvalidLength21", "", "XE34ETHXREGGOPHERSSSS"},
+}
+
+func TestICAPOK(t *testing.T) {
+	for _, test := range icapOKTests {
+		decodeEncodeTest(HexToAddress(test.addr), test.icap, t)
+	}
+}
+
+func TestICAPInvalid(t *testing.T) {
+	for _, test := range icapInvalidTests {
+		failedDecodingTest(test.icap, t)
+	}
+}
+
+func decodeEncodeTest(addr0 Address, icap0 string, t *testing.T) {
+	icap1, err := AddressToICAP(addr0)
+	if err != nil {
+		t.Errorf("ICAP encoding failed: %s", err)
+	}
+	if icap1 != icap0 {
+		t.Errorf("ICAP mismatch: have: %s want: %s", icap1, icap0)
+	}
+
+	addr1, err := ICAPToAddress(icap0)
+	if err != nil {
+		t.Errorf("ICAP decoding failed: %s", err)
+	}
+	if addr1 != addr0 {
+		t.Errorf("Address mismatch: have: %x want: %x", addr1, addr0)
+	}
+}
+
+func failedDecodingTest(icap string, t *testing.T) {
+	addr, err := ICAPToAddress(icap)
+	if err == nil {
+		t.Errorf("Expected ICAP decoding to fail.")
+	}
+	if addr != (Address{}) {
+		t.Errorf("Expected empty Address on failed ICAP decoding.")
+	}
+}