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cognitosrp_test.go
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cognitosrp_test.go
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package cognitosrp
import (
"encoding/base64"
"encoding/hex"
"fmt"
"math/big"
"testing"
"time"
)
func Test_NewCognitoSRP(t *testing.T) {
csrp, err := NewCognitoSRP("test", "test", "eu-west-1_myPool", "123abd", nil)
if err != nil {
t.Errorf("failed creating CognitoSRP: %s", err.Error())
}
// csrp.bigN
expected, _ := big.NewInt(0).SetString(nHex, 16)
if csrp.bigN.Cmp(expected) != 0 {
t.Errorf("bigN: %v, did not match expected value of: %v", csrp.bigN, expected)
}
// csrp.g
expected, _ = big.NewInt(0).SetString("2", 10)
if csrp.g.Cmp(expected) != 0 {
t.Errorf("g: %v, did not match expected value of: %v", csrp.g, expected)
}
// csrp.k
expected, _ = big.NewInt(0).SetString("37772559067617796309459009502931177628717927509759535181635788491848250400486", 10)
if csrp.k.Cmp(expected) != 0 {
t.Errorf("k: %v, did not match expected value of: %v", csrp.k, expected)
}
// csrp.a - is random so lets set it and re-calculate A
csrp.a = big.NewInt(1234567890)
csrp.bigA = csrp.calculateA()
// csrp.bigA
expected, _ = big.NewInt(0).SetString("2012821450179237266067414751941060928019817287314017835667297413615441680042015648893619512074574801551816908048875039310556108650595869145768432324376774060555385775073708569121688902158895642383219736852216366144529156744028151458424436810791218362729260005923018973559621869173270335133101064964177433161771074465994401225946602823489327809869650103314918749719145076380535976325009253493972634191523079035525341598366462733532137597586069288340594563327421244726332307232609401008335819089778907622323610696065668900966210610871808610884224270017149857647788822043386341947275701612494162630191389615660619561655481399573723311377577792260581174997618956152489507325218699555095233121100546572188701563979417701865276739418278601329844176326814813849675127887644523181751359470351143169066091784103404544366711287145804238613966547260918328728126017769114261057445005776403447691297001659393612551419207658913838531096191", 10)
if csrp.bigA.Cmp(expected) != 0 {
t.Errorf("A: %v, did not match expected value of: %v", csrp.bigA, expected)
}
// build a bad csrp
_, err = NewCognitoSRP("test", "test", "myPool", "123abd", nil)
if err == nil {
t.Errorf("PasswordVerifierChallenge should error on bad 'SECRET_BLOCK'")
}
}
func Test_Getters(t *testing.T) {
csrp, _ := NewCognitoSRP("user1", "pa55w0rd", "eu-west-1_myPool", "123abd", nil)
if csrp.GetUsername() != "user1" {
t.Errorf("actual username: %s, did not match expected username: %s", csrp.GetUsername(), "user1")
}
if csrp.GetClientId() != "123abd" {
t.Errorf("actual client ID: %s, did not match expected client ID: %s", csrp.GetUsername(), "123abd")
}
if csrp.GetUserPoolId() != "eu-west-1_myPool" {
t.Errorf("actual pool ID: %s, did not match expected pool ID: %s", csrp.GetUsername(), "eu-west-1_myPool")
}
if csrp.GetUserPoolName() != "myPool" {
t.Errorf("actual pool name: %s, did not match expected pool name: %s", csrp.GetUsername(), "myPool")
}
}
func Test_GetAuthParams(t *testing.T) {
cs := "clientSecret"
csrp, _ := NewCognitoSRP("test", "test", "eu-west-1_myPool", "123abd", &cs)
csrp.a = big.NewInt(1234567890)
csrp.bigA = csrp.calculateA()
params := csrp.GetAuthParams()
if params["USERNAME"] != csrp.username {
t.Errorf("actual USERNAME: %s, did not match expected USERNAME: %s", params["USERNAME"], csrp.username)
}
if params["SRP_A"] != csrp.bigA.Text(16) {
t.Errorf("actual SRP_A: %s, did not match expected SRP_A: %s", params["SRP_A"], csrp.bigA.Text(16))
}
expectedHash := "LoIX/oPJWZzFYv8liJYRo+CHv16FNDY10JlZEDjL3Vg="
if params["SECRET_HASH"] != expectedHash {
t.Errorf("actual SECRET_HASH: %s, did not match expected SECRET_HASH: %s", params["SECRET_HASH"], expectedHash)
}
}
func Test_GetSecretHash(t *testing.T) {
// with secret
cs := "clientSecret"
csrp, _ := NewCognitoSRP("test", "test", "eu-west-1_myPool", "123abd", &cs)
hash, err := csrp.GetSecretHash("test")
if err != nil {
return
}
expectedHash := "LoIX/oPJWZzFYv8liJYRo+CHv16FNDY10JlZEDjL3Vg="
if hash != expectedHash {
t.Errorf("actual hash: %s, did not match expected hash: %s", hash, expectedHash)
}
csrp.clientSecret = nil
_, err = csrp.GetSecretHash("test")
if err == nil {
t.Fatal("GetSecretHash should error on nil client secret")
}
}
func Test_PasswordVerifierChallenge(t *testing.T) {
cs := "clientSecret"
csrp, _ := NewCognitoSRP("test", "test", "eu-west-1_myPool", "123abd", &cs)
csrp.a = big.NewInt(1234567890)
csrp.bigA = csrp.calculateA()
challengeParmas := map[string]string{
"USER_ID_FOR_SRP": "test",
"SALT": big.NewInt(1234567890).Text(16),
"SRP_B": big.NewInt(1234567890).Text(16),
"SECRET_BLOCK": base64.StdEncoding.EncodeToString([]byte("secretssecrestssecrets")),
}
challResp, _ := csrp.PasswordVerifierChallenge(challengeParmas, time.Date(2018, 7, 10, 11, 1, 0, 0, time.UTC))
expected := "tdvQu/Li/qWl8Nni0aFPs+MwY4rvKZm0kSMrGIMSUHk="
if challResp["PASSWORD_CLAIM_SIGNATURE"] != expected {
t.Errorf("actual PASSWORD_CLAIM_SIGNATURE: %s, did not match expected PASSWORD_CLAIM_SIGNATURE: %s", challResp["PASSWORD_CLAIM_SIGNATURE"], expected)
}
// Bad challenge params
challengeParmas["SECRET_BLOCK"] = "not base64 encoded"
_, err := csrp.PasswordVerifierChallenge(challengeParmas, time.Date(2018, 7, 10, 11, 46, 0, 0, time.UTC))
if err == nil {
t.Fatal("PasswordVerifierChallenge should error on bad 'SECRET_BLOCK'")
}
}
func Test_calculateA(t *testing.T) {
csrp, _ := NewCognitoSRP("test", "test", "eu-west-1_myPool", "123abd", nil)
// test panic
csrp.g = big.NewInt(0)
defer func() {
errmsg := recover().(string)
if errmsg != "Safety check for A failed. A must not be divisable by N" {
t.Errorf("Wrong panic message: %s", errmsg)
}
}()
csrp.calculateA()
t.Fatal("calculateA did not panic on 0 g value")
}
func Test_getPasswordAuthenticationKey(t *testing.T) {
cs := "clientSecret"
csrp, _ := NewCognitoSRP("test", "test", "eu-west-1_myPool", "123abd", &cs)
bigB := big.NewInt(1234567890)
salt := big.NewInt(1234567890)
csrp.a = big.NewInt(1234567890)
csrp.bigA = csrp.calculateA()
expectedBigA, _ := big.NewInt(0).SetString("2012821450179237266067414751941060928019817287314017835667297413615441680042015648893619512074574801551816908048875039310556108650595869145768432324376774060555385775073708569121688902158895642383219736852216366144529156744028151458424436810791218362729260005923018973559621869173270335133101064964177433161771074465994401225946602823489327809869650103314918749719145076380535976325009253493972634191523079035525341598366462733532137597586069288340594563327421244726332307232609401008335819089778907622323610696065668900966210610871808610884224270017149857647788822043386341947275701612494162630191389615660619561655481399573723311377577792260581174997618956152489507325218699555095233121100546572188701563979417701865276739418278601329844176326814813849675127887644523181751359470351143169066091784103404544366711287145804238613966547260918328728126017769114261057445005776403447691297001659393612551419207658913838531096191", 10)
if csrp.bigA.Cmp(expectedBigA) != 0 {
t.Errorf("A: %v, did not match expected value of: %v", csrp.bigA, expectedBigA)
}
expectedKey := "d96cde6c95dda17175c1293140c5a81f"
key := csrp.getPasswordAuthenticationKey(csrp.username, csrp.password, bigB, salt)
keyHex := hex.EncodeToString(key)
if keyHex != expectedKey {
t.Errorf("actual key: %s, did not match expected key: %s", keyHex, expectedKey)
}
}
func Test_hashSha256(t *testing.T) {
in := "testvalue"
expectedOut := "b52ccfce5067e90f4b4f8ec8567eb50f9e10850d6e114a2ea09cb45f753011b9"
out := hashSha256([]byte(in))
if out != expectedOut {
t.Errorf("actual out: %s, did not match expected out: %s", out, expectedOut)
}
}
func Test_hexHash(t *testing.T) {
in := "testvalue"
in = hex.EncodeToString([]byte(in))
expectedOut := "b52ccfce5067e90f4b4f8ec8567eb50f9e10850d6e114a2ea09cb45f753011b9"
out := hexHash(in)
if out != expectedOut {
t.Errorf("actual out: %s, did not match expected out: %s", out, expectedOut)
}
}
func Test_hexToBig(t *testing.T) {
in := "499602d2"
expectedOut := big.NewInt(1234567890)
out := hexToBig(in)
if out.Cmp(expectedOut) != 0 {
t.Errorf("actual out: %v, did not match expected out: %v", out, expectedOut)
}
// test panic
in = "non-hex input"
defer func() {
errmsg := recover().(string)
if errmsg != fmt.Sprintf("unable to covert \"%s\" to big Int", in) {
t.Errorf("Wrong panic message: %s", errmsg)
}
}()
hexToBig(in)
t.Fatal("hexToBig did not panic on non-hex input")
}
func Test_bigToHex(t *testing.T) {
in := big.NewInt(1234567890)
expectedOut := "499602d2"
out := bigToHex(in)
if out != expectedOut {
t.Errorf("actual out: %v, did not match expected out: %v", out, expectedOut)
}
}
func Test_padHex(t *testing.T) {
in := "123abc"
expectedOut := "123abc"
out := padHex(in)
if out != expectedOut {
t.Errorf("actual out: %s, did not match expected out: %s", out, expectedOut)
}
in = "123abcd"
expectedOut = "0123abcd"
out = padHex(in)
if out != expectedOut {
t.Errorf("actual out: %s, did not match expected out: %s", out, expectedOut)
}
in = "8123abcd"
expectedOut = "008123abcd"
out = padHex(in)
if out != expectedOut {
t.Errorf("actual out: %s, did not match expected out: %s", out, expectedOut)
}
}
func Test_computeHKDF(t *testing.T) {
inIkm, inSalt := "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", "0c98b195a479d1a7c70c99dd680f34f5805fe686d0bc716549ff2ed895aa9111"
expectedOut := "d96cde6c95dda17175c1293140c5a81f"
out := hex.EncodeToString([]byte(computeHKDF(inIkm, inSalt)))
if out != expectedOut {
t.Errorf("actual out: %v, did not match expected out: %v", out, expectedOut)
}
}
func Test_calculateU(t *testing.T) {
inA, _ := big.NewInt(0).SetString("6D797365637265746861736841", 16)
inB, _ := big.NewInt(0).SetString("6D797365637265746861736842", 16)
expectedOut, _ := big.NewInt(0).SetString("39743664823761398449876968619416475559594078623923024211668626611155104513539", 10)
out := calculateU(inA, inB)
if out.Cmp(expectedOut) != 0 {
t.Errorf("actual out: %v, did not match expected out: %v", out, expectedOut)
}
}