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google: add support for "impersonated_service_account" credential type.

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New credential type supported: "impersonated_service_account".

Extend the "credentialsFile" struct to take into account the credential source for the impersonation.

Reuse of `ImpersonateTokenSource` struct, from `google/internal/externalaccount/Impersonate.go' file. The struct has a package-scope visibility now.

Fixes: #515

Change-Id: I87e213be6d4b6add2d6d82b91b1b38e43a0d2fe4
GitHub-Last-Rev: 14806e6b37
GitHub-Pull-Request: golang/oauth2#516
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/344369
Reviewed-by: Cody Oss <codyoss@google.com>
Trust: Cody Oss <codyoss@google.com>
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Cody Oss <codyoss@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
Guillaume Blaquiere
2021-10-28 17:47:33 +00:00
committed by Cody Oss
parent 6b3c2da341
commit ba495a64dc
3 changed files with 55 additions and 19 deletions
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28
google/google.go
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@@ -92,9 +92,10 @@ func JWTConfigFromJSON(jsonKey []byte, scope ...string) (*jwt.Config, error) {
// JSON key file types.
const (
serviceAccountKey = "service_account"
userCredentialsKey = "authorized_user"
externalAccountKey = "external_account"
serviceAccountKey = "service_account"
userCredentialsKey = "authorized_user"
externalAccountKey = "external_account"
impersonatedServiceAccount = "impersonated_service_account"
)
// credentialsFile is the unmarshalled representation of a credentials file.
@@ -121,9 +122,13 @@ type credentialsFile struct {
TokenURLExternal string `json:"token_url"`
TokenInfoURL string `json:"token_info_url"`
ServiceAccountImpersonationURL string `json:"service_account_impersonation_url"`
Delegates []string `json:"delegates"`
CredentialSource externalaccount.CredentialSource `json:"credential_source"`
QuotaProjectID string `json:"quota_project_id"`
WorkforcePoolUserProject string `json:"workforce_pool_user_project"`
// Service account impersonation
SourceCredentials *credentialsFile `json:"source_credentials"`
}
func (f *credentialsFile) jwtConfig(scopes []string, subject string) *jwt.Config {
@@ -180,6 +185,23 @@ func (f *credentialsFile) tokenSource(ctx context.Context, params CredentialsPar
WorkforcePoolUserProject: f.WorkforcePoolUserProject,
}
return cfg.TokenSource(ctx)
case impersonatedServiceAccount:
if f.ServiceAccountImpersonationURL == "" || f.SourceCredentials == nil {
return nil, errors.New("missing 'source_credentials' field or 'service_account_impersonation_url' in credentials")
}
ts, err := f.SourceCredentials.tokenSource(ctx, params)
if err != nil {
return nil, err
}
imp := externalaccount.ImpersonateTokenSource{
Ctx: ctx,
URL: f.ServiceAccountImpersonationURL,
Scopes: params.Scopes,
Ts: ts,
Delegates: f.Delegates,
}
return oauth2.ReuseTokenSource(nil, imp), nil
case "":
return nil, errors.New("missing 'type' field in credentials")
default: