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fix(appsync): Create Lambda permission when using Lambda Authorizer(#… #20641

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merged 3 commits into from
Jun 13, 2022
Merged

fix(appsync): Create Lambda permission when using Lambda Authorizer(#… #20641

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30a81a7
fix(appsync): Create Lambda permission when using Lambda Authorizer(#…
cm-iwata Jun 7, 2022
6bd2165
chore(appsync): Update docstring for LambdaAuthorizerConfig.handler
cm-iwata Jun 13, 2022
0102b21
Merge branch 'main' into fix/appsync-lambdaauthorizer-permission
mergify[bot] Jun 13, 2022
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16 changes: 11 additions & 5 deletions packages/@aws-cdk/aws-appsync/lib/graphqlapi.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -167,11 +167,6 @@ export interface OpenIdConnectConfig {
export interface LambdaAuthorizerConfig {
/**
* The authorizer lambda function.
* Note: This Lambda function must have the following resource-based policy assigned to it.
* When configuring Lambda authorizers in the console, this is done for you.
* To do so with the AWS CLI, run the following:
*
* `aws lambda add-permission --function-name "arn:aws:lambda:us-east-2:111122223333:function:my-function" --statement-id "appsync" --principal appsync.amazonaws.com --action lambda:InvokeFunction`
*
* @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-appsync-graphqlapi-lambdaauthorizerconfig.html
*/
Expand Down Expand Up @@ -519,6 +514,17 @@ export class GraphqlApi extends GraphqlApiBase {
this.apiKeyResource.addDependsOn(this.schemaResource);
this.apiKey = this.apiKeyResource.attrApiKey;
}

if (modes.some((mode) => mode.authorizationType === AuthorizationType.LAMBDA)) {
const config = modes.find((mode: AuthorizationMode) => {
return mode.authorizationType === AuthorizationType.LAMBDA && mode.lambdaAuthorizerConfig;
})?.lambdaAuthorizerConfig;
config?.handler.addPermission('appsync', {
principal: new ServicePrincipal('appsync.amazonaws.com'),
action: 'lambda:InvokeFunction',
});
}

}

/**
Expand Down
39 changes: 39 additions & 0 deletions packages/@aws-cdk/aws-appsync/test/appsync-auth.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -669,6 +669,18 @@ describe('AppSync Lambda Authorization', () => {
},
},
});

Template.fromStack(stack).hasResourceProperties('AWS::Lambda::Permission', {
Action: 'lambda:InvokeFunction',
FunctionName: {
'Fn::GetAtt': [
'authfunction96361832',
'Arn',
],
},
});


});

test('Lambda authorization configurable in default authorization', () => {
Expand Down Expand Up @@ -702,6 +714,15 @@ describe('AppSync Lambda Authorization', () => {
IdentityValidationExpression: 'custom-.*',
},
});
Template.fromStack(stack).hasResourceProperties('AWS::Lambda::Permission', {
Action: 'lambda:InvokeFunction',
FunctionName: {
'Fn::GetAtt': [
'authfunction96361832',
'Arn',
],
},
});
});

test('Lambda authorization configurable in additional authorization has default configuration', () => {
Expand Down Expand Up @@ -733,6 +754,15 @@ describe('AppSync Lambda Authorization', () => {
},
}],
});
Template.fromStack(stack).hasResourceProperties('AWS::Lambda::Permission', {
Action: 'lambda:InvokeFunction',
FunctionName: {
'Fn::GetAtt': [
'authfunction96361832',
'Arn',
],
},
});
});

test('Lambda authorization configurable in additional authorization', () => {
Expand Down Expand Up @@ -768,6 +798,15 @@ describe('AppSync Lambda Authorization', () => {
},
}],
});
Template.fromStack(stack).hasResourceProperties('AWS::Lambda::Permission', {
Action: 'lambda:InvokeFunction',
FunctionName: {
'Fn::GetAtt': [
'authfunction96361832',
'Arn',
],
},
});
});

test('Lambda authorization throws with multiple lambda authorization', () => {
Expand Down