Ruby

Decode Microsoft Graph ID Token

See more Microsoft Graph Examples

Demonstrates how to decode a Microsoft Graph ID token. Ruby

require 'chilkat'

success = false

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

#  This example loads an id_token and decodes it.

#  Our Microsoft Graph OAuth2 token looks like this:

#  {
#    "token_type": "Bearer",
#    "scope": "openid profile User.ReadWrite Mail.ReadWrite Mail.Send Files.ReadWrite User.Read Calendars.ReadWrite Group.ReadWrite.All",
#    "expires_in": 3600,
#    "ext_expires_in": 3600,
#    "access_token": "EwCQA8l6...0HhMKYwC",
#    "refresh_token": "MCWulIvzi2yD0S...igEFn51mqcByhZtAJg",
#    "id_token": "eyJ0eXAiOiJKV1...Q7lRDaR-7A",
#    "expires_on": "1562862714"
#  }

jsonToken = Chilkat::CkJsonObject.new()
success = jsonToken.LoadFile("qa_data/tokens/microsoftGraph.json")
if (success == false)
    print "Failed to load the JSON file..." + "\n";
    exit
end

#  Use Chilkat's JWT API to examine the id_token..
jwt = Chilkat::CkJwt.new()
idToken = jsonToken.stringOf("id_token")

#  Extract the JOSE header..
jose = jwt.getHeader(idToken)

jsonHeader = Chilkat::CkJsonObject.new()
jsonHeader.Load(jose)
jsonHeader.put_EmitCompact(false)
print jsonHeader.emit() + "\n";

#  The JOSE header looks like this:

#  {
#    "typ": "JWT",
#    "alg": "RS256",
#    "kid": "1LTMzakihiRla_8z2BEJVXeWMqo"
#  }

claims = jwt.getPayload(idToken)

jsonClaims = Chilkat::CkJsonObject.new()
jsonClaims.Load(claims)
jsonClaims.put_EmitCompact(false)
print jsonClaims.emit() + "\n";

#  The claims look like this:

#  {
#    "ver": "2.0",
#    "iss": "https://login.microsoftonline.com/9188040d-6c67-4c5b-b112-36a304b66dad/v2.0",
#    "sub": "AAAAAAAAAAAAAAAAAAAAAHJFryd6Gydo-XtTd1nhUNQ",
#    "aud": "18c456bd-db75-43fe-9724-9e5d821c68ff",
#    "exp": 1562945513,
#    "iat": 1562858813,
#    "nbf": 1562858813,
#    "name": "Matt Chilkat",
#    "preferred_username": "matt@example.com",
#    "oid": "00000000-0000-0000-3a33-fceb9b74cc15",
#    "tid": "9188040d-6c67-4c5b-b112-36a304b66dad",
#    "aio": "DfibJqKnWC1c0FS6G ... W6pvTrQuYzyq16ghY$"
#  }
#  

#  Use this online tool to generate parsing code from sample JSON: 
#  Generate Parsing Code from JSON

#  Get each of the claims..
ver = jsonClaims.stringOf("ver")
iss = jsonClaims.stringOf("iss")
s_sub = jsonClaims.stringOf("sub")
aud = jsonClaims.stringOf("aud")
exp = jsonClaims.IntOf("exp")
iat = jsonClaims.IntOf("iat")
nbf = jsonClaims.IntOf("nbf")
name = jsonClaims.stringOf("name")
preferred_username = jsonClaims.stringOf("preferred_username")
oid = jsonClaims.stringOf("oid")
tid = jsonClaims.stringOf("tid")
aio = jsonClaims.stringOf("aio")