const crypto/tls.downgradeCanaryTLS12

3 uses

	crypto/tls (current package)
		common.go#L208: 	downgradeCanaryTLS12 = "DOWNGRD\x01"
		handshake_client.go#L190: 	tls12Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS12
		handshake_server.go#L193: 			copy(serverRandom[24:], downgradeCanaryTLS12)