tls: add AES256 ciphers

R=golang-dev, rsc, agl
CC=golang-dev
https://golang.org/cl/6188061

cipher_suites.go

@@ -55,9 +55,11 @@ var cipherSuites = []*cipherSuite{
 	{TLS_RSA_WITH_RC4_128_SHA, 16, 20, 0, rsaKA, false, cipherRC4, macSHA1},
 	{TLS_RSA_WITH_3DES_EDE_CBC_SHA, 24, 20, 8, rsaKA, false, cipher3DES, macSHA1},
 	{TLS_RSA_WITH_AES_128_CBC_SHA, 16, 20, 16, rsaKA, false, cipherAES, macSHA1},
+	{TLS_RSA_WITH_AES_256_CBC_SHA, 32, 20, 16, rsaKA, false, cipherAES, macSHA1},
 	{TLS_ECDHE_RSA_WITH_RC4_128_SHA, 16, 20, 0, ecdheRSAKA, true, cipherRC4, macSHA1},
 	{TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, 24, 20, 8, ecdheRSAKA, true, cipher3DES, macSHA1},
 	{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, 16, 20, 16, ecdheRSAKA, true, cipherAES, macSHA1},
+	{TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, 32, 20, 16, ecdheRSAKA, true, cipherAES, macSHA1},
 }
 
 func cipherRC4(key, iv []byte, isRead bool) interface{} {
@@ -182,7 +184,9 @@ const (
 	TLS_RSA_WITH_RC4_128_SHA            uint16 = 0x0005
 	TLS_RSA_WITH_3DES_EDE_CBC_SHA       uint16 = 0x000a
 	TLS_RSA_WITH_AES_128_CBC_SHA        uint16 = 0x002f
+	TLS_RSA_WITH_AES_256_CBC_SHA        uint16 = 0x0035
 	TLS_ECDHE_RSA_WITH_RC4_128_SHA      uint16 = 0xc011
 	TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xc012
 	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA  uint16 = 0xc013
+	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA  uint16 = 0xc014
 )