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Azure OpenID Connect Step 2 -- Get id_token and Validate
See more OIDC Examples
After getting the endpoints by querying the Azure's OIDC well-known discovery document (OpenID Configuration document), we use the authorization_endpoint to get the id_token, and then validate it..Chilkat Go Downloads
success := false
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// In our previous example (Azure Fetch OpenID Connect metadata document) we fetched
// the OpenID configuration document which is JSON which contains an entry for authorization_endpoint.
authorization_endpoint := "https://login.microsoftonline.com/{tenant}/oauth2/v2.0/authorize"
// The OpenID Connect metadata document also contained a jwks_uri entry. This is the JSON Web Key Set (JWKS),
// which is a set of keys containing the public keys used to verify any JSON Web Token (JWT) (in this case the id_token)
// issued by the authorization server and signed using the RS256 signing algorithm.
jwks_uri := "https://login.microsoftonline.com/{tenant}/discovery/v2.0/keys"
// We're going to send the following GET request, but it will be sent through an interactive web browser (not by Chilkat).
// The following code will form the URL that is to be programmatically loaded and sent in a browser.
// GET https://login.microsoftonline.com/{tenant}/oauth2/v2.0/authorize?
// client_id=6731de76-14a6-49ae-97bc-6eba6914391e
// &response_type=id_token
// &redirect_uri=http%3A%2F%2Flocalhost%2Fmyapp%2F
// &response_mode=form_post
// &scope=openid
// &state=12345
// &nonce=678910
// Use this object to set params and then get the URL-encoded query params string
req := chilkat.NewHttpRequest()
req.AddParam("client_id","{client_id}")
req.AddParam("response_type","id_token")
req.AddParam("redirect_uri","http://localhost:3017/")
req.AddParam("response_mode","form_post")
req.AddParam("scope","openid")
prng := chilkat.NewPrng()
req.AddParam("state",*prng.GenRandom(3,"decimal"))
req.AddParam("nonce",*prng.GenRandom(4,"decimal"))
encodedParams := req.GetUrlEncodedParams()
fmt.Println(*encodedParams)
// Sample URL encoded params:
// client_id=6731de76-14a6-49ae-97bc-6eba6914391e&redirect_uri=http%3A%2F%2Flocalhost%3A3017%2F&response_mode=form_post&scope=openid&state=3572902&nonce=57352474
// This is the URL to be programmatically loaded and sent in an interactive web browser..
sbUrl := chilkat.NewStringBuilder()
sbUrl.Append(authorization_endpoint)
sbUrl.Append("?")
sbUrl.Append(*encodedParams)
url := sbUrl.GetAsString()
// Before we launch the browser with the contents of sbUrl, create a socket to listen for the eventual callback..
listenSock := chilkat.NewSocket()
// This is the connection received from the browser.
browserSock := chilkat.NewSocket()
// Listen at the port indicated by the redirect_uri above.
backLog := 5
success = listenSock.BindAndListen(3017,backLog)
if success == false {
fmt.Println(listenSock.LastErrorText())
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
return
}
// Wait for the browser's connection in a background thread.
// (We'll send load the URL into the browser following this..)
// Wait a max of 60 seconds before giving up.
maxWaitMs := 30000
c := make(chan *chilkat.Task)
go listenSock.AcceptNextAsync(maxWaitMs,browserSock,c)
task := <-c
// -------------------------------------------------------------------
// At this point, your application should load the URL in a browser.
oauth2 := chilkat.NewOAuth2()
success = oauth2.LaunchBrowser(*url)
if success == false {
fmt.Println(oauth2.LastErrorText())
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
task.DisposeTask()
oauth2.DisposeOAuth2()
return
}
// -------------------------------------------------------------------
// Wait for the listenSock's task to complete.
success = task.Wait(maxWaitMs)
if !success || (task.StatusInt() != 7) || (task.TaskSuccess() != true) {
if !success {
// The task.LastErrorText applies to the Wait method call.
fmt.Println(task.LastErrorText())
} else {
// The ResultErrorText applies to the underlying task method call (i.e. the AcceptNextConnection)
fmt.Println(task.Status())
fmt.Println(task.ResultErrorText())
}
task.DisposeTask()
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
task.DisposeTask()
oauth2.DisposeOAuth2()
return
}
// If we get to this point, a connection on listenSock was accepted, and the redirected POST
// is waiting to be read on the connected socket.
// The POST we are going to read contains the following:
// POST /myapp/ HTTP/1.1
// Host: localhost
// Content-Type: application/x-www-form-urlencoded
//
// id_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6Ik1uQ19WWmNB...&state=12345
// But first.. we no longer need the listen socket...
// Stop listening on port 3017.
listenSock.Close(10)
task.DisposeTask()
// We're acting as a temporary web server to receive this one redirected HTTP request..
// Read the start line of the request.. (i.e. the "POST /myapp/ HTTP/1.1")
startLine := browserSock.ReceiveUntilMatch("\r\n")
if browserSock.LastMethodSuccess() == false {
fmt.Println(browserSock.LastErrorText())
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
task.DisposeTask()
oauth2.DisposeOAuth2()
return
}
// Read the request header.
requestHeader := browserSock.ReceiveUntilMatch("\r\n\r\n")
if browserSock.LastMethodSuccess() == false {
fmt.Println(browserSock.LastErrorText())
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
task.DisposeTask()
oauth2.DisposeOAuth2()
return
}
fmt.Println(*requestHeader)
fmt.Println("----")
// Read the body.
// The body will contain "id_token= eyJ......"
sbRequestBody := chilkat.NewStringBuilder()
success = browserSock.ReceiveSb(sbRequestBody)
if success == false {
fmt.Println(browserSock.LastErrorText())
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
task.DisposeTask()
oauth2.DisposeOAuth2()
sbRequestBody.DisposeStringBuilder()
return
}
fmt.Println(*sbRequestBody.GetAsString())
// Given that we're acting as a web server, we must send a response..
// We can now send our HTTP response.
sbResponseHtml := chilkat.NewStringBuilder()
sbResponseHtml.Append("<html><body><p>Thank you!</b></body</html>")
sbResponse := chilkat.NewStringBuilder()
sbResponse.Append("HTTP/1.1 200 OK\r\n")
sbResponse.Append("Content-Length: ")
sbResponse.AppendInt(sbResponseHtml.Length())
sbResponse.Append("\r\n")
sbResponse.Append("Content-Type: text/html\r\n")
sbResponse.Append("\r\n")
sbResponse.AppendSb(sbResponseHtml)
browserSock.SendString(*sbResponse.GetAsString())
browserSock.Close(50)
// Get the id_token from the sbRequestBody that we just received.
// (Remember, we're acting as the web server, thus we received the redirect request..)
hashTab := chilkat.NewHashtable()
hashTab.AddQueryParams(*sbRequestBody.GetAsString())
// See https://docs.microsoft.com/en-us/azure/active-directory/develop/id-tokens#validating-an-id-token
// for more information about ID tokens..
idToken := hashTab.LookupStr("id_token")
jwt := chilkat.NewJwt()
// Let's see if the time constraints, if any, are valid.
// The above JWT was created on the afternoon of 16-May-2016, with an expiration of 1 hour.
// If the current system time is before the "nbf" time, or after the "exp" time,
// then IsTimeValid will return false/0.
// Also, we'll allow a leeway of 60 seconds to account for any clock skew.
// Note: If the token has no "nbf" or "exp" claim fields, then IsTimeValid is always true.
leeway := 60
bTimeValid := jwt.IsTimeValid(*idToken,leeway)
fmt.Println("time constraints valid: ", bTimeValid)
// Now let's recover the original claims JSON (the payload).
payload := jwt.GetPayload(*idToken)
// The payload will likely be in compact form:
fmt.Println(*payload)
// We can format for human viewing by loading it into Chilkat's JSON object
// and emit.
json := chilkat.NewJsonObject()
success = json.Load(*payload)
json.SetEmitCompact(false)
fmt.Println(*json.Emit())
// Sample output:
// {
// "aud": "f125d695-c50e-456e-a579-a486f06d1213",
// "iss": "https://login.microsoftonline.com/6d8ddd66-68d1-43b0-af5c-e31b4b7dd5cd/v2.0",
// "iat": 1626535322,
// "nbf": 1626535322,
// "exp": 1626539222,
// "aio": "AWQAm/8TAAAAHQncmY0VvhgyMIhfleHX3DjsGfmlPM1CopkJ3mPnBUnCxrJ0ubruaACEhwGO7NsoHBhqFEzRzPxOq7MtuGVFsql+qJKZx8vQCszKYEPX9Wb3b5+d5KJTABHCIH48bTFd",
// "idp": "https://sts.windows.net/9188040d-6c67-4c5b-b112-36a304b66dad/",
// "nonce": "1519043321",
// "rh": "0.ARgAZt2NbdFosEOvXOMbS33VzZXWJfEOxW5FpXmkhvBtEhMYALQ.",
// "sub": "RMIZlHJ7hfsJmL8Qq3h6M0nPi4g-HEavnAFgxzaT2KM",
// "tid": "6d8ddd66-68d1-43b0-af5c-e31b4b7dd5cd",
// "uti": "-BXGHxvfREW-r9HI5NBiAA",
// "ver": "2.0"
// }
// We can recover the original JOSE header in the same way:
joseHeader := jwt.GetHeader(*idToken)
// The payload will likely be in compact form:
fmt.Println(*joseHeader)
// We can format for human viewing by loading it into Chilkat's JSON object
// and emit.
jsonJoseHeader := chilkat.NewJsonObject()
success = jsonJoseHeader.Load(*joseHeader)
jsonJoseHeader.SetEmitCompact(false)
fmt.Println(*jsonJoseHeader.Emit())
// Sample output:
// {
// "typ": "JWT",
// "alg": "RS256",
// "kid": "nOo3ZDrODXEK1jKWhXslHR_KXEg"
// }
// Finally, we need to fetch the JSON Web Key Sets from the jwks_uri
// and use it to verify the id_token's RSA signature.
sbJwks := chilkat.NewStringBuilder()
http := chilkat.NewHttp()
success = http.QuickGetSb(jwks_uri,sbJwks)
if success == false {
fmt.Println(http.LastErrorText())
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
task.DisposeTask()
oauth2.DisposeOAuth2()
sbRequestBody.DisposeStringBuilder()
sbResponseHtml.DisposeStringBuilder()
sbResponse.DisposeStringBuilder()
hashTab.DisposeHashtable()
jwt.DisposeJwt()
json.DisposeJsonObject()
jsonJoseHeader.DisposeJsonObject()
sbJwks.DisposeStringBuilder()
http.DisposeHttp()
return
}
jwkset := chilkat.NewJsonObject()
success = jwkset.LoadSb(sbJwks)
jwkset.SetEmitCompact(false)
fmt.Println(*jwkset.Emit())
// A sample jwkset:
// {
// "keys": [
// {
// "kty": "RSA",
// "use": "sig",
// "kid": "nOo3ZDrODXEK1jKWhXslHR_KXEg",
// "x5t": "nOo3ZDrODXEK1jKWhXslHR_KXEg",
// "n": "oaLLT9hkcSj ... NVrZdUdTBQ",
// "e": "AQAB",
// "x5c": [
// "MIIDBTC ... MRku44Dw7R"
// ],
// "issuer": "https://login.microsoftonline.com/6d8ddd66-68d1-43b0-af5c-e31b4b7dd5cd/v2.0"
// },
// {
// "kty": "RSA",
// "use": "sig",
// "kid": "l3sQ-50cCH4xBVZLHTGwnSR7680",
// "x5t": "l3sQ-50cCH4xBVZLHTGwnSR7680",
// "n": "sfsXMXW ... AYkwb6xUQ",
// "e": "AQAB",
// "x5c": [
// "MIIDBTCCA ... BWrh+/vJ"
// ],
// "issuer": "https://login.microsoftonline.com/6d8ddd66-68d1-43b0-af5c-e31b4b7dd5cd/v2.0"
// },
// {
// "kty": "RSA",
// "use": "sig",
// "kid": "DqUu8gf-nAgcyjP3-SuplNAXAnc",
// "x5t": "DqUu8gf-nAgcyjP3-SuplNAXAnc",
// "n": "1n7-nWSL ... V3pFWhQ",
// "e": "AQAB",
// "x5c": [
// "MIIC8TC ... 9pIcnkPQ=="
// ],
// "issuer": "https://login.microsoftonline.com/6d8ddd66-68d1-43b0-af5c-e31b4b7dd5cd/v2.0"
// },
// {
// "kty": "RSA",
// "use": "sig",
// "kid": "OzZ5Dbmcso9Qzt2ModGmihg30Bo",
// "x5t": "OzZ5Dbmcso9Qzt2ModGmihg30Bo",
// "n": "01re9a2BU ... 5OzQ6Q",
// "e": "AQAB",
// "x5c": [
// "MIIC8TC ... YmwJ6sDdRvQ=="
// ],
// "issuer": "https://login.microsoftonline.com/6d8ddd66-68d1-43b0-af5c-e31b4b7dd5cd/v2.0"
// }
// ]
// }
// We should have an RSA key with kid matching the kid from the joseHeader..
kid := jsonJoseHeader.StringOf("kid")
// Find the RSA key with the specified key id
jwk := jwkset.FindRecord("keys","kid",*kid,true)
if jwkset.LastMethodSuccess() == false {
fmt.Println("Failed to find a matching RSA key in the JWK key set...")
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
task.DisposeTask()
oauth2.DisposeOAuth2()
sbRequestBody.DisposeStringBuilder()
sbResponseHtml.DisposeStringBuilder()
sbResponse.DisposeStringBuilder()
hashTab.DisposeHashtable()
jwt.DisposeJwt()
json.DisposeJsonObject()
jsonJoseHeader.DisposeJsonObject()
sbJwks.DisposeStringBuilder()
http.DisposeHttp()
jwkset.DisposeJsonObject()
return
}
var verified bool
pubkey := chilkat.NewPublicKey()
success = pubkey.LoadFromString(*jwk.Emit())
if success == false {
fmt.Println(pubkey.LastErrorText())
fmt.Println(*jwk.Emit())
} else {
verified = jwt.VerifyJwtPk(*idToken,pubkey)
fmt.Println("Verified: ", verified)
}
jwk.DisposeJsonObject()
req.DisposeHttpRequest()
prng.DisposePrng()
sbUrl.DisposeStringBuilder()
listenSock.DisposeSocket()
browserSock.DisposeSocket()
task.DisposeTask()
oauth2.DisposeOAuth2()
sbRequestBody.DisposeStringBuilder()
sbResponseHtml.DisposeStringBuilder()
sbResponse.DisposeStringBuilder()
hashTab.DisposeHashtable()
jwt.DisposeJwt()
json.DisposeJsonObject()
jsonJoseHeader.DisposeJsonObject()
sbJwks.DisposeStringBuilder()
http.DisposeHttp()
jwkset.DisposeJsonObject()
pubkey.DisposePublicKey()