Implement Push Auth support for 2FA verification

When `2fa_verify` command is executed:

- A user is asked to enter OTP
- A blocking call for push auth is performed

Then:

- If the push auth request fails, the user is still able to enter
OTP
- If OTP is invalid, the `2fa_verify` command ends the execution
- If OTP is valid or push auth request succeeded, then the user is
successfully authenticated
- If 30 seconds passed while no OTP or Push have been provided,
then the `2fa_verify` command ends the execution

1 files changed, 154 insertions, 0 deletions

diff --git a/internal/command/twofactorverify/twofactorverifymanual_test.go b/internal/command/twofactorverify/twofactorverifymanual_test.go
new file mode 100644
index 0000000..59db281
--- /dev/null
+++ b/internal/command/twofactorverify/twofactorverifymanual_test.go
@@ -0,0 +1,154 @@
+package twofactorverify
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"gitlab.com/gitlab-org/gitlab-shell/v14/client/testserver"
+	"gitlab.com/gitlab-org/gitlab-shell/v14/internal/command/commandargs"
+	"gitlab.com/gitlab-org/gitlab-shell/v14/internal/command/readwriter"
+	"gitlab.com/gitlab-org/gitlab-shell/v14/internal/config"
+	"gitlab.com/gitlab-org/gitlab-shell/v14/internal/gitlabnet/twofactorverify"
+)
+
+func setupManual(t *testing.T) []testserver.TestRequestHandler {
+	requests := []testserver.TestRequestHandler{
+		{
+			Path: "/api/v4/internal/two_factor_manual_otp_check",
+			Handler: func(w http.ResponseWriter, r *http.Request) {
+				b, err := io.ReadAll(r.Body)
+				defer r.Body.Close()
+
+				require.NoError(t, err)
+
+				var requestBody *twofactorverify.RequestBody
+				require.NoError(t, json.Unmarshal(b, &requestBody))
+
+				var body map[string]interface{}
+				switch requestBody.KeyId {
+				case "1":
+					body = map[string]interface{}{
+						"success": true,
+					}
+					json.NewEncoder(w).Encode(body)
+				case "error":
+					body = map[string]interface{}{
+						"success": false,
+						"message": "error message",
+					}
+					require.NoError(t, json.NewEncoder(w).Encode(body))
+				case "broken":
+					w.WriteHeader(http.StatusInternalServerError)
+				}
+			},
+		},
+		{
+			Path: "/api/v4/internal/two_factor_push_otp_check",
+			Handler: func(w http.ResponseWriter, r *http.Request) {
+				b, err := io.ReadAll(r.Body)
+				defer r.Body.Close()
+
+				require.NoError(t, err)
+
+				var requestBody *twofactorverify.RequestBody
+				require.NoError(t, json.Unmarshal(b, &requestBody))
+
+				time.Sleep(5 * time.Second)
+
+				var body map[string]interface{}
+				switch requestBody.KeyId {
+				case "1":
+					body = map[string]interface{}{
+						"success": true,
+					}
+					json.NewEncoder(w).Encode(body)
+				case "error":
+					body = map[string]interface{}{
+						"success": false,
+						"message": "error message",
+					}
+					require.NoError(t, json.NewEncoder(w).Encode(body))
+				case "broken":
+					w.WriteHeader(http.StatusInternalServerError)
+				default:
+					body = map[string]interface{}{
+						"success": true,
+						"message": "default message",
+					}
+					json.NewEncoder(w).Encode(body)
+				}
+			},
+		},
+	}
+
+	return requests
+}
+
+const (
+	manualQuestion    = "OTP: \n"
+	manualErrorHeader = "OTP validation failed.\n"
+)
+
+func TestExecuteManual(t *testing.T) {
+	requests := setupManual(t)
+
+	url := testserver.StartSocketHttpServer(t, requests)
+
+	testCases := []struct {
+		desc           string
+		arguments      *commandargs.Shell
+		answer         string
+		expectedOutput string
+	}{
+		{
+			desc:           "With a known key id",
+			arguments:      &commandargs.Shell{GitlabKeyId: "1"},
+			answer:         "123456\n",
+			expectedOutput: manualQuestion + "OTP validation successful. Git operations are now allowed.\n",
+		},
+		{
+			desc:           "With bad response",
+			arguments:      &commandargs.Shell{GitlabKeyId: "-1"},
+			answer:         "123456\n",
+			expectedOutput: manualQuestion + manualErrorHeader + "Parsing failed\n",
+		},
+		{
+			desc:           "With API returns an error",
+			arguments:      &commandargs.Shell{GitlabKeyId: "error"},
+			answer:         "yes\n",
+			expectedOutput: manualQuestion + manualErrorHeader + "error message\n",
+		},
+		{
+			desc:           "With API fails",
+			arguments:      &commandargs.Shell{GitlabKeyId: "broken"},
+			answer:         "yes\n",
+			expectedOutput: manualQuestion + manualErrorHeader + "Internal API error (500)\n",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.desc, func(t *testing.T) {
+			output := &bytes.Buffer{}
+
+			input := bytes.NewBufferString(tc.answer)
+
+			cmd := &Command{
+				Config:     &config.Config{GitlabUrl: url},
+				Args:       tc.arguments,
+				ReadWriter: &readwriter.ReadWriter{Out: output, In: input},
+			}
+
+			err := cmd.Execute(context.Background())
+
+			require.NoError(t, err)
+			require.Equal(t, tc.expectedOutput, output.String())
+		})
+	}
+}