1package twofactor 2 3import ( 4 "fmt" 5 "testing" 6) 7 8var sha1Hmac = []byte{ 9 0x1f, 0x86, 0x98, 0x69, 0x0e, 10 0x02, 0xca, 0x16, 0x61, 0x85, 11 0x50, 0xef, 0x7f, 0x19, 0xda, 12 0x8e, 0x94, 0x5b, 0x55, 0x5a, 13} 14 15var truncExpect int64 = 0x50ef7f19 16 17// This test runs through the truncation example given in the RFC. 18func TestTruncate(t *testing.T) { 19 if result := truncate(sha1Hmac); result != truncExpect { 20 fmt.Printf("hotp: expected truncate -> %d, saw %d\n", 21 truncExpect, result) 22 t.FailNow() 23 } 24 25 sha1Hmac[19]++ 26 if result := truncate(sha1Hmac); result == truncExpect { 27 fmt.Println("hotp: expected truncation to fail") 28 t.FailNow() 29 } 30} 31