Try to use OIDC token from metadata server as first option #1787
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Apologies for the build issues on this - wanted to get something in front of you before i spent time polishing this |
src/app/credential-internal.ts
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| @@ -32,6 +32,7 @@ const GOOGLE_AUTH_TOKEN_PATH = '/o/oauth2/token'; | |||
| // NOTE: the Google Metadata Service uses HTTP over a vlan | |||
| const GOOGLE_METADATA_SERVICE_HOST = 'metadata.google.internal'; | |||
| const GOOGLE_METADATA_SERVICE_TOKEN_PATH = '/computeMetadata/v1/instance/service-accounts/default/token'; | |||
| const GOOGLE_METADATA_SERVICE_IDENTITY_PATH = '/computeMetadata/v1/instance/service-accounts/default/token'; | |||
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This looks identical to GOOGLE_METADATA_SERVICE_TOKEN_PATH. I think we want to replace default with the service account email. http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/${saEmail}/identity?audience=${audience}
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Ahhhh, this was a typo - it should be /identity, not /token
| : await this.getUrl(resources, FIREBASE_FUNCTION_URL_FORMAT); | ||
| task.httpRequest.url = functionUrl; | ||
| try { | ||
| const idToken = await this.app.options.credential.getIDToken(functionUrl) |
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I think for Extensions use-case we still need a way to pass the service account. Please ignore if you plan to address that in a separate PR.
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Turns out that within Cloud Functions, default/ is just an alias for whatever service account the function is running as. For extensions, this is the service account we'd want to pass in anyways
| * @param audience The URL this token will be used to call. | ||
| * @returns A base64 encoded OIDC token. | ||
| */ | ||
| getIDToken(audience: string): Promise<string>; |
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It ok to add to this interface? or is this a public interface/would require a API review?
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Closing in favor of #1812 |
Taking a crack at switching the Tasks code to use ID tokens from the Metadata