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/**
* Copyright 2014 Paul Querna
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package totp
import (
"github.com/pquerna/otp"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"encoding/base32"
"testing"
"time"
)
type tc struct {
TS int64
TOTP string
Mode otp.Algorithm
Secret string
}
var (
secSha1 = base32.StdEncoding.EncodeToString([]byte("12345678901234567890"))
secSha256 = base32.StdEncoding.EncodeToString([]byte("12345678901234567890123456789012"))
secSha512 = base32.StdEncoding.EncodeToString([]byte("1234567890123456789012345678901234567890123456789012345678901234"))
rfcMatrixTCs = []tc{
{59, "94287082", otp.AlgorithmSHA1, secSha1},
{59, "46119246", otp.AlgorithmSHA256, secSha256},
{59, "90693936", otp.AlgorithmSHA512, secSha512},
{1111111109, "07081804", otp.AlgorithmSHA1, secSha1},
{1111111109, "68084774", otp.AlgorithmSHA256, secSha256},
{1111111109, "25091201", otp.AlgorithmSHA512, secSha512},
{1111111111, "14050471", otp.AlgorithmSHA1, secSha1},
{1111111111, "67062674", otp.AlgorithmSHA256, secSha256},
{1111111111, "99943326", otp.AlgorithmSHA512, secSha512},
{1234567890, "89005924", otp.AlgorithmSHA1, secSha1},
{1234567890, "91819424", otp.AlgorithmSHA256, secSha256},
{1234567890, "93441116", otp.AlgorithmSHA512, secSha512},
{2000000000, "69279037", otp.AlgorithmSHA1, secSha1},
{2000000000, "90698825", otp.AlgorithmSHA256, secSha256},
{2000000000, "38618901", otp.AlgorithmSHA512, secSha512},
{20000000000, "65353130", otp.AlgorithmSHA1, secSha1},
{20000000000, "77737706", otp.AlgorithmSHA256, secSha256},
{20000000000, "47863826", otp.AlgorithmSHA512, secSha512},
}
)
//
// Test vectors from http://tools.ietf.org/html/rfc6238#appendix-B
// NOTE -- the test vectors are documented as having the SAME
// secret -- this is WRONG -- they have a variable secret
// depending upon the hmac algorithm:
// http://www.rfc-editor.org/errata_search.php?rfc=6238
// this only took a few hours of head/desk interaction to figure out.
//
func TestValidateRFCMatrix(t *testing.T) {
for _, tx := range rfcMatrixTCs {
valid, err := ValidateCustom(tx.TOTP, tx.Secret, time.Unix(tx.TS, 0).UTC(),
ValidateOpts{
Digits: otp.DigitsEight,
Algorithm: tx.Mode,
})
require.NoError(t, err,
"unexpected error totp=%s mode=%v ts=%v", tx.TOTP, tx.Mode, tx.TS)
require.True(t, valid,
"unexpected totp failure totp=%s mode=%v ts=%v", tx.TOTP, tx.Mode, tx.TS)
}
}
func TestGenerateRFCTCs(t *testing.T) {
for _, tx := range rfcMatrixTCs {
passcode, err := GenerateCodeCustom(tx.Secret, time.Unix(tx.TS, 0).UTC(),
ValidateOpts{
Digits: otp.DigitsEight,
Algorithm: tx.Mode,
})
assert.Nil(t, err)
assert.Equal(t, tx.TOTP, passcode)
}
}
func TestValidateSkew(t *testing.T) {
secSha1 := base32.StdEncoding.EncodeToString([]byte("12345678901234567890"))
tests := []tc{
{29, "94287082", otp.AlgorithmSHA1, secSha1},
{59, "94287082", otp.AlgorithmSHA1, secSha1},
{61, "94287082", otp.AlgorithmSHA1, secSha1},
}
for _, tx := range tests {
valid, err := ValidateCustom(tx.TOTP, tx.Secret, time.Unix(tx.TS, 0).UTC(),
ValidateOpts{
Digits: otp.DigitsEight,
Algorithm: tx.Mode,
Skew: 1,
})
require.NoError(t, err,
"unexpected error totp=%s mode=%v ts=%v", tx.TOTP, tx.Mode, tx.TS)
require.True(t, valid,
"unexpected totp failure totp=%s mode=%v ts=%v", tx.TOTP, tx.Mode, tx.TS)
}
}
func TestGenerate(t *testing.T) {
k, err := Generate(GenerateOpts{
Issuer: "SnakeOil",
AccountName: "alice@example.com",
})
require.NoError(t, err, "generate basic TOTP")
require.Equal(t, "SnakeOil", k.Issuer(), "Extracting Issuer")
require.Equal(t, "alice@example.com", k.AccountName(), "Extracting Account Name")
require.Equal(t, 16, len(k.Secret()), "Secret is 16 bytes long as base32.")
k, err = Generate(GenerateOpts{
Issuer: "SnakeOil",
AccountName: "alice@example.com",
SecretSize: 20,
})
require.NoError(t, err, "generate larger TOTP")
require.Equal(t, 32, len(k.Secret()), "Secret is 32 bytes long as base32.")
k, err = Generate(GenerateOpts{
Issuer: "SnakeOil",
AccountName: "alice@example.com",
SecretSize: 13, // anything that is not divisable by 5, really
})
require.NoError(t, err, "Secret size is valid when length not divisable by 5.")
require.NotContains(t, k.Secret(), "=", "Secret has no escaped characters.")
}
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