crypto/x509: add certificate support.

R=rsc
CC=golang-dev
https://golang.org/cl/156054

src/pkg/crypto/x509/x509_test.go

@@ -7,6 +7,7 @@ package x509
 import (
 	"big";
 	"crypto/rsa";
+	"encoding/hex";
 	"encoding/pem";
 	"reflect";
 	"strings";
@@ -50,3 +51,94 @@ var rsaPrivateKey = &rsa.PrivateKey{
 	P: bigFromString("98920366548084643601728869055592650835572950932266967461790948584315647051443"),
 	Q: bigFromString("94560208308847015747498523884063394671606671904944666360068158221458669711639"),
 }
+
+type matchHostnamesTest struct {
+	pattern, host	string;
+	ok		bool;
+}
+
+var matchHostnamesTests = []matchHostnamesTest{
+	matchHostnamesTest{"a.b.c", "a.b.c", true},
+	matchHostnamesTest{"a.b.c", "b.b.c", false},
+	matchHostnamesTest{"", "b.b.c", false},
+	matchHostnamesTest{"a.b.c", "", false},
+	matchHostnamesTest{"example.com", "example.com", true},
+	matchHostnamesTest{"example.com", "www.example.com", false},
+	matchHostnamesTest{"*.example.com", "www.example.com", true},
+	matchHostnamesTest{"*.example.com", "xyz.www.example.com", false},
+	matchHostnamesTest{"*.*.example.com", "xyz.www.example.com", true},
+	matchHostnamesTest{"*.www.*.com", "xyz.www.example.com", true},
+}
+
+func TestMatchHostnames(t *testing.T) {
+	for i, test := range matchHostnamesTests {
+		r := matchHostnames(test.pattern, test.host);
+		if r != test.ok {
+			t.Errorf("#%d mismatch got: %t want: %t", i, r, test.ok)
+		}
+	}
+}
+
+func TestCertificateParse(t *testing.T) {
+	s, _ := hex.DecodeString(certBytes);
+	certs, err := ParseCertificates(s);
+	if err != nil {
+		t.Error(err)
+	}
+	if len(certs) != 2 {
+		t.Errorf("Wrong number of certs: got %d want 2", len(certs));
+		return;
+	}
+
+	err = certs[0].CheckSignatureFrom(certs[1]);
+	if err != nil {
+		t.Error(err)
+	}
+
+	if !certs[0].IsValidForHost("mail.google.com") {
+		t.Errorf("cert not valid for host")
+	}
+}
+
+var certBytes = "308203223082028ba00302010202106edf0d9499fd4533dd1297fc42a93be1300d06092a864886"
+	"f70d0101050500304c310b3009060355040613025a4131253023060355040a131c546861777465"
+	"20436f6e73756c74696e67202850747929204c74642e311630140603550403130d546861777465"
+	"20534743204341301e170d3039303332353136343932395a170d3130303332353136343932395a"
+	"3069310b3009060355040613025553311330110603550408130a43616c69666f726e6961311630"
+	"140603550407130d4d6f756e7461696e205669657731133011060355040a130a476f6f676c6520"
+	"496e63311830160603550403130f6d61696c2e676f6f676c652e636f6d30819f300d06092a8648"
+	"86f70d010101050003818d0030818902818100c5d6f892fccaf5614b064149e80a2c9581a218ef"
+	"41ec35bd7a58125ae76f9ea54ddc893abbeb029f6b73616bf0ffd868791fba7af9c4aebf3706ba"
+	"3eeaeed27435b4ddcfb157c05f351d66aa87fee0de072d66d773affbd36ab78bef090e0cc861a9"
+	"03ac90dd98b51c9c41566c017f0beec3bff391051ffba0f5cc6850ad2a590203010001a381e730"
+	"81e430280603551d250421301f06082b0601050507030106082b06010505070302060960864801"
+	"86f842040130360603551d1f042f302d302ba029a0278625687474703a2f2f63726c2e74686177"
+	"74652e636f6d2f54686177746553474343412e63726c307206082b060105050701010466306430"
+	"2206082b060105050730018616687474703a2f2f6f6373702e7468617774652e636f6d303e0608"
+	"2b060105050730028632687474703a2f2f7777772e7468617774652e636f6d2f7265706f736974"
+	"6f72792f5468617774655f5347435f43412e637274300c0603551d130101ff04023000300d0609"
+	"2a864886f70d01010505000381810062f1f3050ebc105e497c7aedf87e24d2f4a986bb3b837bd1"
+	"9b91ebcad98b065992f6bd2b49b7d6d3cb2e427a99d606c7b1d46352527fac39e6a8b6726de5bf"
+	"70212a52cba07634a5e332011bd1868e78eb5e3c93cf03072276786f207494feaa0ed9d53b2110"
+	"a76571f90209cdae884385c882587030ee15f33d761e2e45a6bc308203233082028ca003020102"
+	"020430000002300d06092a864886f70d0101050500305f310b3009060355040613025553311730"
+	"15060355040a130e566572695369676e2c20496e632e31373035060355040b132e436c61737320"
+	"33205075626c6963205072696d6172792043657274696669636174696f6e20417574686f726974"
+	"79301e170d3034303531333030303030305a170d3134303531323233353935395a304c310b3009"
+	"060355040613025a4131253023060355040a131c54686177746520436f6e73756c74696e672028"
+	"50747929204c74642e311630140603550403130d5468617774652053474320434130819f300d06"
+	"092a864886f70d010101050003818d0030818902818100d4d367d08d157faecd31fe7d1d91a13f"
+	"0b713cacccc864fb63fc324b0794bd6f80ba2fe10493c033fc093323e90b742b71c403c6d2cde2"
+	"2ff50963cdff48a500bfe0e7f388b72d32de9836e60aad007bc4644a3b847503f270927d0e62f5"
+	"21ab693684317590f8bfc76c881b06957cc9e5a8de75a12c7a68dfd5ca1c875860190203010001"
+	"a381fe3081fb30120603551d130101ff040830060101ff020100300b0603551d0f040403020106"
+	"301106096086480186f842010104040302010630280603551d110421301fa41d301b3119301706"
+	"035504031310507269766174654c6162656c332d313530310603551d1f042a30283026a024a022"
+	"8620687474703a2f2f63726c2e766572697369676e2e636f6d2f706361332e63726c303206082b"
+	"0601050507010104263024302206082b060105050730018616687474703a2f2f6f6373702e7468"
+	"617774652e636f6d30340603551d25042d302b06082b0601050507030106082b06010505070302"
+	"06096086480186f8420401060a6086480186f845010801300d06092a864886f70d010105050003"
+	"81810055ac63eadea1ddd2905f9f0bce76be13518f93d9052bc81b774bad6950a1eededcfddb07"
+	"e9e83994dcab72792f06bfab8170c4a8edea5334edef1e53d906c7562bd15cf4d18a8eb42bb137"
+	"9048084225c53e8acb7feb6f04d16dc574a2f7a27c7b603c77cd0ece48027f012fb69b37e02a2a"
+	"36dcd585d6ace53f546f961e05af"