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password_test.go

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package api

import (

"strings"

"testing"

"time"

"github.com/umailserver/umailserver/internal/db"

)

// setupTestServer creates a test server with the given config

func setupPasswordTestServer(t *testing.T, cfg Config) *Server {

tmpDir := t.TempDir()

database, err := db.Open(tmpDir + "/test.db")

if err != nil {

t.Fatalf("failed to open db: %v", err)

}

t.Cleanup(func() { database.Close() })

return NewServer(database, nil, cfg)

}

// TestHashPasswordArgon2id tests Argon2id password hashing

func TestHashPasswordArgon2id(t *testing.T) {

hash, err := hashPasswordArgon2id("testpassword")

if err != nil {

t.Fatalf("hashPasswordArgon2id failed: %v", err)

}

// Verify format

if !strings.HasPrefix(hash, "$argon2id$") {

t.Errorf("expected argon2id hash, got %s", hash)

}

// Verify it has all parts

parts := strings.Split(hash, "$")

if len(parts) != 6 {

t.Errorf("expected 6 parts, got %d: %s", len(parts), hash)

}

}

// TestVerifyPasswordArgon2id tests Argon2id password verification

func TestVerifyPasswordArgon2id(t *testing.T) {

password := "testpassword123"

hash, err := hashPasswordArgon2id(password)

if err != nil {

t.Fatalf("hashPasswordArgon2id failed: %v", err)

}

// Correct password

if !verifyPasswordArgon2id(password, hash) {

t.Error("verifyPasswordArgon2id should return true for correct password")

}

// Wrong password

if verifyPasswordArgon2id("wrongpassword", hash) {

t.Error("verifyPasswordArgon2id should return false for wrong password")

}

}

// TestVerifyPasswordArgon2id_InvalidFormat tests verification with invalid formats

func TestVerifyPasswordArgon2id_InvalidFormat(t *testing.T) {

tests := []struct {

name string

hash string

valid bool

}{

{"empty string", "", false},

{"no dollar signs", "argon2id", false},

{"wrong algorithm", "$bcrypt$v=19$m=65536,t=1,p=4$salt$hash", false},

{"too few parts", "$argon2id$v=19$m=65536,t=1,p=4$salt", false},

{"invalid params", "$argon2id$v=19$invalid$salt$hash", false},

{"invalid salt hex", "$argon2id$v=19$m=65536,t=1,p=4$nothex$hash", false},

{"invalid hash hex", "$argon2id$v=19$m=65536,t=1,p=4$salt$nothex", false},

}

for _, tc := range tests {

t.Run(tc.name, func(t *testing.T) {

result := verifyPasswordArgon2id("password", tc.hash)

if result != tc.valid {

t.Errorf("verifyPasswordArgon2id(%q): expected %v, got %v", tc.hash, tc.valid, result)

}

})

}

}

// TestVerifyPasswordArgon2id_InvalidParameters tests with parameters that fail validation

func TestVerifyPasswordArgon2id_InvalidParameters(t *testing.T) {

// Negative time

hash := "$argon2id$v=19$m=65536,t=-1,p=4$aabbccdd$aabbccdd"

if verifyPasswordArgon2id("password", hash) {

t.Error("should fail with negative time")

}

// Zero threads

hash = "$argon2id$v=19$m=65536,t=1,p=0$aabbccdd$aabbccdd"

if verifyPasswordArgon2id("password", hash) {

t.Error("should fail with zero threads")

}

// Too many threads

hash = "$argon2id$v=19$m=65536,t=1,p=256$aabbccdd$aabbccdd"

if verifyPasswordArgon2id("password", hash) {

t.Error("should fail with too many threads")

}

// Empty hash

hash = "$argon2id$v=19$m=65536,t=1,p=4$aabbccdd$"

if verifyPasswordArgon2id("password", hash) {

t.Error("should fail with empty hash")

}

}

// TestServer_HashPassword_Argon2id tests server password hashing with argon2id

func TestServer_HashPassword_Argon2id(t *testing.T) {

cfg := Config{

JWTSecret: "test-secret",

TokenExpiry: time.Hour,

PasswordHasher: "argon2id",

}

server := setupPasswordTestServer(t, cfg)

hash, err := server.hashPassword("testpassword")

if err != nil {

t.Fatalf("hashPassword failed: %v", err)

}

if !strings.HasPrefix(hash, "$argon2id$") {

t.Errorf("expected argon2id hash, got %s", hash)

}

}

// TestServer_HashPassword_Bcrypt tests server password hashing with bcrypt (default)

func TestServer_HashPassword_Bcrypt(t *testing.T) {

cfg := Config{

JWTSecret: "test-secret",

TokenExpiry: time.Hour,

PasswordHasher: "bcrypt",

}

server := setupPasswordTestServer(t, cfg)

hash, err := server.hashPassword("testpassword")

if err != nil {

t.Fatalf("hashPassword failed: %v", err)

}

if !strings.HasPrefix(hash, "$2") {

t.Errorf("expected bcrypt hash starting with $2, got %s", hash)

}

}

// TestServer_VerifyPassword_Argon2id tests verifying argon2id passwords

func TestServer_VerifyPassword_Argon2id(t *testing.T) {

cfg := Config{

JWTSecret: "test-secret",

TokenExpiry: time.Hour,

PasswordHasher: "argon2id",

}

server := setupPasswordTestServer(t, cfg)

password := "testpassword123"

hash, _ := server.hashPassword(password)

// Correct password

matches, needsRehash := server.verifyPassword(password, hash)

if !matches {

t.Error("verifyPassword should return matches=true for correct password")

}

if needsRehash {

t.Error("argon2id hash should not need rehash when argon2id is configured")

}

// Wrong password

matches, _ = server.verifyPassword("wrongpassword", hash)

if matches {

t.Error("verifyPassword should return matches=false for wrong password")

}

}

// TestServer_VerifyPassword_Bcrypt tests verifying bcrypt passwords

func TestServer_VerifyPassword_Bcrypt(t *testing.T) {

cfg := Config{

JWTSecret: "test-secret",

TokenExpiry: time.Hour,

PasswordHasher: "bcrypt",

}

server := setupPasswordTestServer(t, cfg)

password := "testpassword123"

hash, _ := server.hashPassword(password)

// Correct password

matches, needsRehash := server.verifyPassword(password, hash)

if !matches {

t.Error("verifyPassword should return matches=true for correct password")

}

if needsRehash {

t.Error("bcrypt hash should not need rehash when bcrypt is configured")

}

}

// TestServer_VerifyPassword_BcryptNeedsRehash tests that bcrypt needs rehash when argon2id preferred

func TestServer_VerifyPassword_BcryptNeedsRehash(t *testing.T) {

cfg := Config{

JWTSecret: "test-secret",

TokenExpiry: time.Hour,

PasswordHasher: "argon2id", // Prefer argon2id

}

server := setupPasswordTestServer(t, cfg)

// Create a bcrypt hash manually

bcryptHash := "$2a$10$N9qo8uLOickgx2ZMRZoMy.MqrqhmM6JGKpS4G3R1G2JH8YpfB0Bqy"

matches, needsRehash := server.verifyPassword("testpassword", bcryptHash)

// Note: This bcrypt hash is for "testpassword", but we can't verify it matches

// Just check the logic flow - if it was valid, it would need rehash

if !needsRehash && matches {

t.Error("bcrypt hash should need rehash when argon2id is configured")

}

}

// TestServer_VerifyPassword_UnknownFormat tests verifying unknown hash format

func TestServer_VerifyPassword_UnknownFormat(t *testing.T) {

cfg := Config{

JWTSecret: "test-secret",

TokenExpiry: time.Hour,

}

server := setupPasswordTestServer(t, cfg)

matches, needsRehash := server.verifyPassword("password", "$unknown$hash")

if matches {

t.Error("verifyPassword should return false for unknown format")

}

if needsRehash {

t.Error("verifyPassword should return needsRehash=false for unknown format")

}

}

// TestServer_VerifyPassword_InvalidBcrypt tests verifying invalid bcrypt hash

func TestServer_VerifyPassword_InvalidBcrypt(t *testing.T) {

cfg := Config{

JWTSecret: "test-secret",

TokenExpiry: time.Hour,

}

server := setupPasswordTestServer(t, cfg)

// Invalid bcrypt hash (starts with $2 but is invalid)

matches, _ := server.verifyPassword("password", "$2a$10$invalid")

if matches {

t.Error("verifyPassword should return false for invalid bcrypt hash")

}

}

// TestHashPasswordArgon2id_UniqueHashes tests that each hash is unique (different salt)

func TestHashPasswordArgon2id_UniqueHashes(t *testing.T) {

password := "samepassword"

hash1, err := hashPasswordArgon2id(password)

if err != nil {

t.Fatalf("first hash failed: %v", err)

}

hash2, err := hashPasswordArgon2id(password)

if err != nil {

t.Fatalf("second hash failed: %v", err)

}

if hash1 == hash2 {

t.Error("hashes should be unique due to random salt")

}

// But both should verify

if !verifyPasswordArgon2id(password, hash1) {

t.Error("first hash should verify")

}

if !verifyPasswordArgon2id(password, hash2) {

t.Error("second hash should verify")

}

}