fix: [sc-112114] registry collector failed to talk to Replicated private registry (#1613)

decode auth for registry secret

pkg/collect/registry.go

@@ -221,7 +221,14 @@ func getImageAuthConfigFromData(imageRef types.ImageReference, pullSecrets *v1be
 	// docker.io auth uses auth, e.g. auth: <base64_encoded_username_password>
 	// username and password can't contain colon
 	// at least according to https://github.com/docker/cli/blob/v27.0.3/cli/config/configfile/file.go#L247
-	parts := strings.Split(string(auth.Auth), ":")
+	// fallback to not decode for compatibility
+	authStr := auth.Auth
+	decodedAuth, err := base64.StdEncoding.DecodeString(authStr)
+	if err == nil {
+		authStr = string(decodedAuth)
+	}
+
+	parts := strings.Split(authStr, ":")
 	if len(parts) != 2 {
 		return nil, errors.Errorf("expected 2 parts in the auth string, but found %d", len(parts))
 	}

pkg/collect/registry_test.go

@@ -41,6 +41,14 @@ func TestGetImageAuthConfigFromData(t *testing.T) {
 			expectedPassword: "sa-key",
 			expectedError:    false,
 		},
+		{
+			name:             "proxy.replicated.com auth base64 encoded",
+			imageName:        "proxy.replicated.com/app-slug/myimage",
+			dockerConfigJSON: `{"auths":{"proxy.replicated.com":{"auth":"bGljZW5zZV9pZF8xOmxpY2Vuc2VfaWRfMQ=="}}}`,
+			expectedUsername: "license_id_1",
+			expectedPassword: "license_id_1",
+			expectedError:    false,
+		},
 	}
 
 	for _, test := range tests {