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fix: validate github return url metadata #5057

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Merged
lukaszgryglicki merged 3 commits into from
May 28, 2026
Merged

fix: validate github return url metadata #5057

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f83588b
fix: validate github return url metadata
psrsingh May 16, 2026
b009a3a
fix: improve metadata validation error handling
psrsingh May 27, 2026
3a1b0e8
fix(github): address review feedback
psrsingh May 28, 2026
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47 changes: 44 additions & 3 deletions cla-backend-go/github/github_repository.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2597,26 +2597,67 @@ func GetReturnURL(ctx context.Context, installationID, repositoryID int64, pullR
"pullRequestID": pullRequestID,
}

client, err := NewGithubAppClient(installationID)
if installationID <= 0 {
err := errors.New("invalid installation ID")
log.WithFields(f).WithError(err).Warn("invalid installation ID")
return "", err
}
if repositoryID <= 0 {
err := errors.New("invalid repository ID")
log.WithFields(f).WithError(err).Warn("invalid repository ID")
return "", err
}
if pullRequestID <= 0 {
err := errors.New("invalid pull request ID")
log.WithFields(f).WithError(err).Warn("invalid pull request ID")
return "", err
}

client, err := NewGithubAppClient(installationID)
if err != nil {
log.WithFields(f).WithError(err).Warn("unable to create Github client")
return "", err
}

log.WithFields(f).Debugf("getting github repository by id: %d", repositoryID)
repo, _, err := client.Repositories.GetByID(ctx, repositoryID)
repo, resp, err := client.Repositories.GetByID(ctx, repositoryID)
if err != nil {
if ok, wrapped := CheckAndWrapForKnownErrors(resp, err); ok {
log.WithFields(f).WithError(wrapped).Warnf("unable to get repository by ID: %d", repositoryID)
return "", wrapped
}
log.WithFields(f).WithError(err).Warnf("unable to get repository by ID: %d", repositoryID)
return "", err
}
if repo == nil || repo.Owner == nil || repo.Owner.Login == nil || repo.Name == nil {
err := fmt.Errorf("missing repository owner or name for repository ID %d", repositoryID)
log.WithFields(f).WithError(err).Warn("invalid repository metadata")
return "", err
}

owner := repo.GetOwner().GetLogin()
name := repo.GetName()
if owner == "" || name == "" {
err := fmt.Errorf("invalid repository owner/name for repository ID %d", repositoryID)
log.WithFields(f).WithError(err).Warn("invalid repository metadata")
return "", err
}

log.WithFields(f).Debugf("getting pull request by id: %d", pullRequestID)
pullRequest, _, err := client.PullRequests.Get(ctx, *repo.Owner.Login, *repo.Name, pullRequestID)
pullRequest, resp, err := client.PullRequests.Get(ctx, owner, name, pullRequestID)
if err != nil {
if ok, wrapped := CheckAndWrapForKnownErrors(resp, err); ok {
log.WithFields(f).WithError(wrapped).Warnf("unable to get pull request by ID: %d", pullRequestID)
return "", wrapped
}
log.WithFields(f).WithError(err).Warnf("unable to get pull request by ID: %d", pullRequestID)
return "", err
}
if pullRequest == nil || pullRequest.HTMLURL == nil || *pullRequest.HTMLURL == "" {
err := fmt.Errorf("missing html url for pull request %d/%s/%s", pullRequestID, owner, name)
log.WithFields(f).WithError(err).Warn("invalid pull request metadata")
return "", err
}

log.WithFields(f).Debugf("returning pull request html url: %s", *pullRequest.HTMLURL)

Expand Down
23 changes: 22 additions & 1 deletion cla-backend-go/v2/sign/service.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1550,6 +1550,22 @@ func getUserName(user *v1Models.User) string {
return ""
}

// metadataStringValue extracts a string value from metadata and validates it.
func metadataStringValue(metadata map[string]interface{}, key string) (string, error) {
if metadata == nil {
return "", fmt.Errorf("missing %s in metadata", key)
}
v, ok := metadata[key]
if !ok || v == nil {
return "", fmt.Errorf("missing %s in metadata", key)
}
s := strings.TrimSpace(fmt.Sprintf("%v", v))
if s == "" || s == "<nil>" {
return "", fmt.Errorf("missing %s in metadata", key)
}
return s, nil
}

func (s *service) getIndividualSignatureCallbackURLGitlab(ctx context.Context, userID string, metadata map[string]interface{}) (string, error) {
f := logrus.Fields{
"functionName": "sign.getIndividualSignatureCallbackURLGitlab",
Expand All @@ -1572,13 +1588,15 @@ func (s *service) getIndividualSignatureCallbackURLGitlab(ctx context.Context, u
if found, ok := metadata["repository_id"].(string); ok {
repositoryID = found
} else {
err = errors.New("missing repository_id in metadata")
log.WithFields(f).WithError(err).Warnf("unable to get repository ID for user: %s", userID)
return "", err
}

if found, ok := metadata["merge_request_id"].(string); ok {
mergeRequestID = found
} else {
err = errors.New("missing merge_request_id in metadata")
log.WithFields(f).WithError(err).Warnf("unable to get merge request ID for user: %s", userID)
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return "", err
}
Expand All @@ -1599,6 +1617,7 @@ func (s *service) getIndividualSignatureCallbackURLGitlab(ctx context.Context, u
}

if gitlabOrg.OrganizationID == "" {
err = errors.New("missing organization ID for GitLab repository")
log.WithFields(f).WithError(err).Warnf("unable to get organization ID for repository ID: %s", repositoryID)
return "", err
}
Expand Down Expand Up @@ -1631,6 +1650,7 @@ func (s *service) getIndividualSignatureCallbackURL(ctx context.Context, userID
if found, ok := metadata["repository_id"].(string); ok {
repositoryID = found
} else {
err = errors.New("missing repository_id in metadata")
log.WithFields(f).WithError(err).Warnf("unable to get repository ID for user: %s", userID)
return "", err
}
Expand All @@ -1640,6 +1660,7 @@ func (s *service) getIndividualSignatureCallbackURL(ctx context.Context, userID
if found, ok := metadata["pull_request_id"].(string); ok {
pullRequestID = found
} else {
err = errors.New("missing pull_request_id in metadata")
log.WithFields(f).WithError(err).Warnf("unable to get pull request ID for user: %s", userID)
return "", err
}
Expand Down Expand Up @@ -1682,7 +1703,7 @@ func (s *service) getInstallationIDFromRepositoryID(ctx context.Context, reposit

installationId = githubOrg.OrganizationInstallationID
if installationId == 0 {
err = fmt.Errorf("installation ID missing for repository ID: %s", repositoryID)
err = fmt.Errorf("missing installation ID for repository ID in metadata: %s", repositoryID)
log.WithFields(f).WithError(err).Warnf("unable to get installation ID for repository ID: %s", repositoryID)
return 0, err
}
Expand Down
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