IG 7.2.0

JwtValidationFilter

Validates an unsigned, signed, encrypted, or signed and encrypted JWT. The order of signing and encryption is not important; a JWT can be signed and then encrypted, or encrypted and then signed.

If the JWT is validated, the request continues down the chain. The data is provided in the JwtValidationContext.

If the JWT is not validated, data is provided in the JwtValidationErrorContext. If a failure handler is configured, the request passes to the failure handler. Otherwise, an HTTP 403 Forbidden is returned.

Usage

{
  "name": string,
  "type": "JwtValidationFilter",
  "config": {
    "jwt": runtime expression<string>,
    "verificationSecretId": configuration expression<secret-id>,
    "decryptionSecretId": configuration expression<secret-id>,
    "secretsProvider": SecretsProvider reference,
    "skewAllowance": configuration expression<duration>,
    "customizer": JwtValidatorCustomizer reference,
    "failureHandler": Handler reference
  }
}

Properties

"jwt": runtime expression<string>, required

The value of the JWT in the request. Cannot be null.

"verificationSecretId": configuration expression<secret-id>, required to verify the signature of signed tokens

The secret ID for the secret to verify the signature of signed tokens.

If configured, the token must be signed. If not configured, IG does not verify the signature.

For information about how signatures are validated, see Validating the Signature of Signed Tokens. For information about how each type of secret store resolves named secrets, see Secrets.

"decryptionSecretId": configuration expression<secret-id>, required if AM secures access tokens with encryption

The secret ID for the secret to verify the encryption of tokens.

If configured, the token must be encrypted. If not configured, IG does not verify the encryption.

For information about how each type of secret store resolves named secrets, see Secrets.

"secretsProvider": SecretsProvider reference, required

The SecretsProvider to use to resolve queried secrets, such as passwords and cryptographic keys. Provide either the name of a SecretsProvider object defined in the heap, or specify a SecretsProvider object inline.

"customizer": JwtValidatorCustomizer reference, optional

A set of validation constraints for JWT claims and sub-claims. If a claim is not validated against the constraint, the JWT is not validated.

The customizer does not override existing constraints, such as aud, iss, exp, and iat, which are predefined in the IdTokenValidationFilter, Defining a new constraint on an already constrained claim has an impact only if the new constraint is more restrictive.

JwtValidatorCustomizer provides a ScriptableJwtValidatorCustomizer to enrich a builder object by using its methods. Get more information about the following items:

The following examples provide checks:

Check that the value of the claim greaterThan5 is greater than 5
"customizer": {
  "type": "ScriptableJwtValidatorCustomizer",
  "config": {
    "type": "application/x-groovy",
    "source": [
      "builder.claim('/greaterThan5', JsonValue::asInteger, isGreaterThan(5))"
    ]
  }
}
Check that the value of the claim sub is george
"customizer": {
  "type": "ScriptableJwtValidatorCustomizer",
  "config": {
    "type": "application/x-groovy",
    "source": [
      "builder.claim('subname', JsonValue::asString, isEqualTo('george'))"
    ]
  }
}
Check that the value of the custom sub-claim is ForgeRock
"customizer": {
  "type": "ScriptableJwtValidatorCustomizer",
  "config": {
    "type": "application/x-groovy",
    "source": [
      "builder.claim('customclaim/subclaim', JsonValue::asString, isEqualTo('ForgeRock'));"
    ]
  }
}
Check the value of multiple claims
"customizer": {
  "type": "ScriptableJwtValidatorCustomizer",
  "config": {
    "type": "application/x-groovy",
    "source": [
      "builder.claim('aud', listOf(JsonValue::asString), contains('My App'))",
      "       .claim('iat', instant(), isInThePast())",
      "       .claim('exp', instant(), isInTheFuture());",
      "builder.claim('iss', JsonValue::asString, isEqualTo('ForgeRock AM'));"
    ]
  }
}
Check that the value of val1 is greater than val2
"customizer": {
  "type": "ScriptableJwtValidatorCustomizer",
  "config": {
    "type": "application/x-groovy",
    "source": [ "builder.claim('/val1', JsonValue::asInteger, isGreaterThan(claim('/val2').asInteger()))" ]
  }
}
Check that the value of val1 is greater than val2, when both are YYYY-MM-DD dates
"customizer": {
  "type": "ScriptableJwtValidatorCustomizer",
  "config": {
    "type": "application/x-groovy",
    "source": [
      "Function<JsonValue, java.time.LocalDate, Exception> asDate() {",
      "  return (jsonValue) -> java.time.LocalDate.parse(jsonValue.asString());",
      "}",
      "builder.claim('claim1', asDate(), isGreaterThan(claim('claim2').as(asDate())));"
    ]
  }
}
Check that the claim issuer matches the regex pattern
"customizer": {
  "type": "ScriptableJwtValidatorCustomizer",
  "config": {
    "type": "application/x-groovy",
    "source": [ "builder.claim('iss', JsonValue::asString, find(~/.*am\.example\.(com|org)/))" ]
  }
}

Default: Claims are not validated

"skewAllowance": configuration expression<duration>, optional

The duration to add to the validity period of a JWT to allow for clock skew between different servers. To support a zero-trust policy, the skew allowance is by default zero.

A skewAllowance of 2 minutes affects the validity period as follows:

  • A JWT with an iat of 12:00 is valid from 11:58 on the IG clock.

  • A JWT with an exp 13:00 is expired after 13:02 on the IG clock.

Default: zero

"failureHandler": Handler reference, optional

Handler to treat the request on failure.

Provide an inline handler configuration object, or the name of a handler object declared in the heap. See also Handlers.

Default: HTTP 403 Forbidden, the request stops being executed.

Example

For an example of using JwtValidationFilter, see Validate JWTs.

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