OAuth Functions

This section describes functions that relates to OAuth operations.

The following functions for OAuth described here are:

validateJwt

Validates an incoming OAuth JWT.

string validateJwt( string openIdServer, string token, map <string, any> claimsToValidate, //Optional string algorithm //Optional)

Parameters

Parameter

Description

Parameter

Description

openIdServer

This is the JSON Web Key Set (JWKS) endpoint of an OpenID Connect (OIDC) server. For example,https://<server_domain>/.well-known/jwks.json

The JWKS endpoint returns the public key set in JSON format shown below, that can be used to validate the signature of the JWT (token) issued by the OIDC provider.

JWKS Cache

The cache is accessible only from the backend and cannot be updated by users. It is used to reduce the number of connections to the openIdServer and will be reset if the workflow is aborted.

{ "[openIdServer + kid #1]": { "use": "sig", "kty": "RSA", "kid": "e1583dde-e337-4bda-abf5-85a8fed1bafb", "alg": "RS256", "n": "** public key in here **", "e": "AQAB" }, "[openIdServer + kid #2]": { "use": "sig", "kty": "RSA", "kid": "e1583dde-e337-4bda-abf5-85a8fed1bafa", "alg": "RS256", "n": "** public key in here **", "e": "AQAB" } }

The public key can be used to verify the integrity of a JWT, ensuring that it has not been tampered with.

token

This refers to the JWT (Json Web Token) that needs to be validated.

claimsToValidate

An optional map field to declare the claims as well as the corresponding value to validate against the token.

algorithm

An optional field to verify the signing algorithm used by the token. The possible values could be RSA256, RSA384, RSA512, ECDSA256, ECDSA384, ECDSA512. By default, the APL function uses RSA256.

Returns

An error message on validation failure. Null on validation success.

Example

Example of the validateJwt function with optional values for claims and algorithm populated.

string token = "eyJhbGciOiJSUzUxMiIsInR5cCI6IkpXVCJ9.eyJhcHBpZGFjciI6IjIiLCJhdWQiOiJhZTQ3ZThmZC1iMmJlLTQ2MjYtYTdiNS0xOWQyODk2MWJhMWUiLCJjbGllbnRfaWQiOiIxMjM0LTEyMzQtMTIzNC0xMjM0In0.plstF-xhshrrLKi3Q8J1c5FUSoUImSoYLIs5aaQ-3mvjyVpCtoqnty-Tm5zNWCj_mIRo3aQvnq5IDLUF7VsBc9l-y6vlbcXHdAT3xs3R8x_Lw72tN_t_btyt9Haof7_1DgyxKoQMf7QiwsRX6S8XHk5sWKxJ96zxOLGJdO_HvEPfJKA2eFlK3Tvm715_Bfzp_gOMMyEY1PX5ZKvD9sGsb3kZLpv9Tk8uvaWvU9AFx59paDEAAEbEOo-M27zP9rR_qecSymuDMspHl7zWmBG9kbmrJY-pMScMaHRJiGzORMCs59Nd29Kn-_w0OPPmMV6RTdWbvrgTTU_EUB9JY44rlw"; map<string, any> claimsToValidate = mapCreate(string, any); mapSet(claimsToValidate, "appidacr", "2"); mapSet(claimsToValidate, "aud", "ae47e8fd-b2be-4626-a7b5-19d28961ba1e"); string error_message = JwtValidation.validateJwt("https://10.60.10.30/endpoint", token, claimsToValidate, "RSA512");

validateAndDecodeJwt

Validates an incoming OAuth JWT with the error message and decoded payloads as return.

Parameters

Parameter

Description

Parameter

Description

openIdServer

This is the JSON Web Key Set (JWKS) endpoint of an OpenID Connect (OIDC) server. For example,https://<server_domain>/.well-known/jwks.json

The JWKS endpoint returns the public key set in JSON format shown below, that can be used to validate the signature of the JWT (token) issued by the OIDC provider.

JWKS Cache

The cache is accessible only from the backend and cannot be updated by users. It is used to reduce the number of connections to the openIdServer and will be reset if the workflow is aborted.

The public key can be used to verify the integrity of a JWT, ensuring that it has not been tampered with.

token

This refers to the JWT (Json Web Token) that needs to be validated.

claimsToValidate

An optional map field to declare the claims as well as the corresponding value to validate against the token.

algorithm

An optional field to verify the signing algorithm used by the token. The possible values could be RSA256, RSA384, RSA512, ECDSA256, ECDSA384, ECDSA512. By default, the APL function uses RSA256.

Returns

An JwtValidationResult UDR which consists of error message on validation failure and decoded payloads. The error message will be Null on validation success.


This chapter includes the following section: