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wip: add JWT as possible AuthorizationMode #319

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wip: add JWT as possible AuthorizationMode #319

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42 changes: 28 additions & 14 deletions okta/requestExecutor.go
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Original file line number Diff line number Diff line change
Expand Up @@ -125,12 +125,15 @@ func (re *RequestExecutor) NewRequest(method string, url string, body interface{
req.Header.Add("Authorization", "Bearer "+re.config.Okta.Client.Token)
}

if re.config.Okta.Client.AuthorizationMode == "PrivateKey" {
if re.config.Okta.Client.AuthorizationMode == "PrivateKey" || re.config.Okta.Client.AuthorizationMode == "JWT" {
if re.cache.Has(AccessTokenCacheKey) {
token := re.cache.GetString(AccessTokenCacheKey)
req.Header.Add("Authorization", "Bearer "+token)
} else {
if re.config.PrivateKeySigner == nil {
var clientAssertion string

switch {
case re.config.Okta.Client.PrivateKey != "":
priv := []byte(strings.ReplaceAll(re.config.Okta.Client.PrivateKey, `\n`, "\n"))

privPem, _ := pem.Decode(priv)
Expand All @@ -152,22 +155,33 @@ func (re *RequestExecutor) NewRequest(method string, url string, body interface{
}

re.config.PrivateKeySigner, err = jose.NewSigner(jose.SigningKey{Algorithm: jose.RS256, Key: parsedKey}, signerOptions)

if err != nil {
return nil, err
}
}

claims := ClientAssertionClaims{
Subject: re.config.Okta.Client.ClientId,
IssuedAt: jwt.NewNumericDate(time.Now()),
Expiry: jwt.NewNumericDate(time.Now().Add(time.Hour * time.Duration(1))),
Issuer: re.config.Okta.Client.ClientId,
Audience: re.config.Okta.Client.OrgUrl + "/oauth2/v1/token",
}
jwtBuilder := jwt.Signed(re.config.PrivateKeySigner).Claims(claims)
clientAssertion, err := jwtBuilder.CompactSerialize()
if err != nil {
return nil, err
// now that we've set re.config.PrivateKeySigner, the following case statement will work
fallthrough

case re.config.PrivateKeySigner != nil:
claims := ClientAssertionClaims{
Subject: re.config.Okta.Client.ClientId,
IssuedAt: jwt.NewNumericDate(time.Now()),
Expiry: jwt.NewNumericDate(time.Now().Add(time.Hour * time.Duration(1))),
Issuer: re.config.Okta.Client.ClientId,
Audience: re.config.Okta.Client.OrgUrl + "/oauth2/v1/token",
}

jwtBuilder := jwt.Signed(re.config.PrivateKeySigner).Claims(claims)

clientAssertion, err = jwtBuilder.CompactSerialize()

if err != nil {
return nil, err
}

case re.config.Okta.Client.AuthorizationMode == "JWT":
clientAssertion = re.config.Okta.Client.Token
}

var tokenRequestBuff io.ReadWriter
Expand Down