support multi key pattern matching

.gitignore

@@ -27,6 +27,5 @@ go.work.sum
 # syncthing files
 .stfolder
 
-chatlog
 chatlog.exe# Added by goreleaser init:
 dist/

cmd/chatlog/cmd_dumpmemory.go

@@ -0,0 +1,146 @@
+package chatlog
+
+import (
+	"archive/zip"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"runtime"
+	"time"
+
+	"github.com/rs/zerolog/log"
+	"github.com/spf13/cobra"
+
+	"github.com/sjzar/chatlog/internal/wechat"
+	"github.com/sjzar/chatlog/internal/wechat/key/darwin/glance"
+)
+
+func init() {
+	rootCmd.AddCommand(dumpmemoryCmd)
+}
+
+var dumpmemoryCmd = &cobra.Command{
+	Use:   "dumpmemory",
+	Short: "dump memory",
+	Run: func(cmd *cobra.Command, args []string) {
+		if runtime.GOOS != "darwin" {
+			log.Info().Msg("dump memory only support macOS")
+		}
+
+		session := time.Now().Format("20060102150405")
+
+		dir, err := os.Getwd()
+		if err != nil {
+			log.Fatal().Err(err).Msg("get current directory failed")
+			return
+		}
+		log.Info().Msgf("current directory: %s", dir)
+
+		// step 1. check pid
+		if err = wechat.Load(); err != nil {
+			log.Fatal().Err(err).Msg("load wechat failed")
+			return
+		}
+		accounts := wechat.GetAccounts()
+		if len(accounts) == 0 {
+			log.Fatal().Msg("no wechat account found")
+			return
+		}
+
+		log.Info().Msgf("found %d wechat account", len(accounts))
+		for i, a := range accounts {
+			log.Info().Msgf("%d. %s %d %s", i, a.FullVersion, a.PID, a.DataDir)
+		}
+
+		// step 2. dump memory
+		account := accounts[0]
+		file := fmt.Sprintf("wechat_%s_%d_%s.bin", account.FullVersion, account.PID, session)
+		path := filepath.Join(dir, file)
+		log.Info().Msgf("dumping memory to %s", path)
+
+		g := glance.NewGlance(account.PID)
+		b, err := g.Read()
+		if err != nil {
+			log.Fatal().Err(err).Msg("read memory failed")
+			return
+		}
+
+		if err = os.WriteFile(path, b, 0644); err != nil {
+			log.Fatal().Err(err).Msg("write memory failed")
+			return
+		}
+
+		log.Info().Msg("dump memory success")
+
+		// step 3. copy encrypted database file
+		dbFile := "db_storage/session/session.db"
+		if account.Version == 3 {
+			dbFile = "Session/session_new.db"
+		}
+		from := filepath.Join(account.DataDir, dbFile)
+		to := filepath.Join(dir, fmt.Sprintf("wechat_%s_%d_session.db", account.FullVersion, account.PID))
+
+		log.Info().Msgf("copying %s to %s", from, to)
+		b, err = os.ReadFile(from)
+		if err != nil {
+			log.Fatal().Err(err).Msg("read session.db failed")
+			return
+		}
+		if err = os.WriteFile(to, b, 0644); err != nil {
+			log.Fatal().Err(err).Msg("write session.db failed")
+			return
+		}
+		log.Info().Msg("copy session.db success")
+
+		// step 4. package
+		zipFile := fmt.Sprintf("wechat_%s_%d_%s.zip", account.FullVersion, account.PID, session)
+		zipPath := filepath.Join(dir, zipFile)
+		log.Info().Msgf("packaging to %s", zipPath)
+
+		zf, err := os.Create(zipPath)
+		if err != nil {
+			log.Fatal().Err(err).Msg("create zip file failed")
+			return
+		}
+		defer zf.Close()
+
+		zw := zip.NewWriter(zf)
+
+		for _, file := range []string{file, to} {
+			f, err := os.Open(file)
+			if err != nil {
+				log.Fatal().Err(err).Msg("open file failed")
+				return
+			}
+			defer f.Close()
+			info, err := f.Stat()
+			if err != nil {
+				log.Fatal().Err(err).Msg("get file info failed")
+				return
+			}
+			header, err := zip.FileInfoHeader(info)
+			if err != nil {
+				log.Fatal().Err(err).Msg("create zip file info header failed")
+				return
+			}
+			header.Name = filepath.Base(file)
+			header.Method = zip.Deflate
+			writer, err := zw.CreateHeader(header)
+			if err != nil {
+				log.Fatal().Err(err).Msg("create zip file header failed")
+				return
+			}
+			if _, err = io.Copy(writer, f); err != nil {
+				log.Fatal().Err(err).Msg("copy file to zip failed")
+				return
+			}
+		}
+		if err = zw.Close(); err != nil {
+			log.Fatal().Err(err).Msg("close zip writer failed")
+			return
+		}
+
+		log.Info().Msgf("package success, please send %s to developer", zipPath)
+	},
+}

cmd/chatlog/log.go

@@ -22,6 +22,8 @@ func initLog(cmd *cobra.Command, args []string) {
 	if Debug {
 		zerolog.SetGlobalLevel(zerolog.DebugLevel)
 	}
+
+	log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr, TimeFormat: time.RFC3339})
 }
 
 func initTuiLog(cmd *cobra.Command, args []string) {

internal/chatlog/ctx/context.go

@@ -74,6 +74,16 @@ func (c *Context) SwitchHistory(account string) {
 		c.WorkDir = history.WorkDir
 		c.HTTPEnabled = history.HTTPEnabled
 		c.HTTPAddr = history.HTTPAddr
+	} else {
+		c.Account = ""
+		c.Platform = ""
+		c.Version = 0
+		c.FullVersion = ""
+		c.DataKey = ""
+		c.DataDir = ""
+		c.WorkDir = ""
+		c.HTTPEnabled = false
+		c.HTTPAddr = ""
 	}
 }
 

internal/wechat/decrypt/validator.go

@@ -15,13 +15,17 @@ type Validator struct {
 }
 
 // NewValidator 创建一个仅用于验证的验证器
-func NewValidator(dataDir string, platform string, version int) (*Validator, error) {
+func NewValidator(platform string, version int, dataDir string) (*Validator, error) {
+	dbFile := GetSimpleDBFile(platform, version)
+	dbPath := filepath.Join(dataDir + "/" + dbFile)
+	return NewValidatorWithFile(platform, version, dbPath)
+}
+
+func NewValidatorWithFile(platform string, version int, dbPath string) (*Validator, error) {
 	decryptor, err := NewDecryptor(platform, version)
 	if err != nil {
 		return nil, err
 	}
-	dbFile := GetSimpleDBFile(platform, version)
-	dbPath := filepath.Join(dataDir + "/" + dbFile)
 	d, err := common.OpenDBFile(dbPath, decryptor.GetPageSize())
 	if err != nil {
 		return nil, err

internal/wechat/key/darwin/v3.go

@@ -19,12 +19,22 @@ const (
 	MaxWorkersV3 = 8
 )
 
+var V3KeyPatterns = []KeyPatternInfo{
+	{
+		Pattern: []byte{0x72, 0x74, 0x72, 0x65, 0x65, 0x5f, 0x69, 0x33, 0x32},
+		Offset:  24,
+	},
+}
+
 type V3Extractor struct {
-	validator *decrypt.Validator
+	validator   *decrypt.Validator
+	keyPatterns []KeyPatternInfo
 }
 
 func NewV3Extractor() *V3Extractor {
-	return &V3Extractor{}
+	return &V3Extractor{
+		keyPatterns: V3KeyPatterns,
+	}
 }
 
 func (e *V3Extractor) Extract(ctx context.Context, proc *model.Process) (string, error) {
@@ -127,7 +137,6 @@ func (e *V3Extractor) findMemory(ctx context.Context, pid uint32, memoryChannel
 
 // worker processes memory regions to find V3 version key
 func (e *V3Extractor) worker(ctx context.Context, memoryChannel <-chan []byte, resultChannel chan<- string) {
-	keyPattern := []byte{0x72, 0x74, 0x72, 0x65, 0x65, 0x5f, 0x69, 0x33, 0x32}
 	for {
 		select {
 		case <-ctx.Done():
@@ -137,51 +146,60 @@ func (e *V3Extractor) worker(ctx context.Context, memoryChannel <-chan []byte, r
 				return
 			}
 
-			index := len(memory)
+			if key, ok := e.SearchKey(ctx, memory); ok {
-
-			for {
 				select {
-				case <-ctx.Done():
+				case resultChannel <- key:
-					return // Exit if context cancelled
 				default:
 				}
-
-				log.Debug().Msgf("Searching for V3 key in memory region, size: %d bytes", len(memory))
-
-				// Find pattern from end to beginning
-				index = bytes.LastIndex(memory[:index], keyPattern)
-				if index == -1 {
-					break // No more matches found
-				}
-
-				log.Debug().Msgf("Found potential V3 key pattern in memory region, index: %d", index)
-
-				// For V3, the key is 32 bytes and starts right after the pattern
-				if index+24+32 > len(memory) {
-					index -= 1
-					continue
-				}
-
-				// Extract the key data, which is right after the pattern and 32 bytes long
-				keyOffset := index + 24
-				keyData := memory[keyOffset : keyOffset+32]
-
-				// Validate key against database header
-				if e.validator.Validate(keyData) {
-					select {
-					case resultChannel <- hex.EncodeToString(keyData):
-						log.Debug().Msg("Key found: " + hex.EncodeToString(keyData))
-						return
-					default:
-					}
-				}
-
-				index -= 1
 			}
 		}
 	}
 }
 
+func (e *V3Extractor) SearchKey(ctx context.Context, memory []byte) (string, bool) {
+	for _, keyPattern := range e.keyPatterns {
+		index := len(memory)
+
+		for {
+			select {
+			case <-ctx.Done():
+				return "", false
+			default:
+			}
+
+			// Find pattern from end to beginning
+			index = bytes.LastIndex(memory[:index], keyPattern.Pattern)
+			if index == -1 {
+				break // No more matches found
+			}
+
+			// Check if we have enough space for the key
+			keyOffset := index + keyPattern.Offset
+			if keyOffset < 0 || keyOffset+32 > len(memory) {
+				index -= 1
+				continue
+			}
+
+			// Extract the key data, which is 32 bytes long
+			keyData := memory[keyOffset : keyOffset+32]
+
+			// Validate key against database header
+			if e.validator.Validate(keyData) {
+				log.Debug().
+					Str("pattern", hex.EncodeToString(keyPattern.Pattern)).
+					Int("offset", keyPattern.Offset).
+					Str("key", hex.EncodeToString(keyData)).
+					Msg("Key found")
+				return hex.EncodeToString(keyData), true
+			}
+
+			index -= 1
+		}
+	}
+
+	return "", false
+}
+
 func (e *V3Extractor) SetValidate(validator *decrypt.Validator) {
 	e.validator = validator
 }

internal/wechat/key/darwin/v4.go

@@ -19,12 +19,26 @@ const (
 	MaxWorkers = 8
 )
 
+var V4KeyPatterns = []KeyPatternInfo{
+	{
+		Pattern: []byte{0x20, 0x66, 0x74, 0x73, 0x35, 0x28, 0x25, 0x00},
+		Offset:  16,
+	},
+	{
+		Pattern: []byte{0x20, 0x66, 0x74, 0x73, 0x35, 0x28, 0x25, 0x00},
+		Offset:  -80,
+	},
+}
+
 type V4Extractor struct {
-	validator *decrypt.Validator
+	validator   *decrypt.Validator
+	keyPatterns []KeyPatternInfo
 }
 
 func NewV4Extractor() *V4Extractor {
-	return &V4Extractor{}
+	return &V4Extractor{
+		keyPatterns: V4KeyPatterns,
+	}
 }
 
 func (e *V4Extractor) Extract(ctx context.Context, proc *model.Process) (string, error) {
@@ -127,8 +141,6 @@ func (e *V4Extractor) findMemory(ctx context.Context, pid uint32, memoryChannel
 
 // worker processes memory regions to find V4 version key
 func (e *V4Extractor) worker(ctx context.Context, memoryChannel <-chan []byte, resultChannel chan<- string) {
-	keyPattern := []byte{0x20, 0x66, 0x74, 0x73, 0x35, 0x28, 0x25, 0x00}
-
 	for {
 		select {
 		case <-ctx.Done():
@@ -138,47 +150,65 @@ func (e *V4Extractor) worker(ctx context.Context, memoryChannel <-chan []byte, r
 				return
 			}
 
-			index := len(memory)
+			if key, ok := e.SearchKey(ctx, memory); ok {
-
-			for {
 				select {
-				case <-ctx.Done():
+				case resultChannel <- key:
-					return // Exit if context cancelled
 				default:
 				}
-
-				// Find pattern from end to beginning
-				index = bytes.LastIndex(memory[:index], keyPattern)
-				if index == -1 {
-					break // No more matches found
-				}
-
-				// Check if we have enough space for the key
-				if index+16+32 > len(memory) {
-					index -= 1
-					continue
-				}
-
-				// Extract the key data, which is 16 bytes after the pattern and 32 bytes long
-				keyOffset := index + 16
-				keyData := memory[keyOffset : keyOffset+32]
-
-				// Validate key against database header
-				if e.validator.Validate(keyData) {
-					select {
-					case resultChannel <- hex.EncodeToString(keyData):
-						log.Debug().Msg("Key found: " + hex.EncodeToString(keyData))
-						return
-					default:
-					}
-				}
-
-				index -= 1
 			}
 		}
 	}
 }
 
+func (e *V4Extractor) SearchKey(ctx context.Context, memory []byte) (string, bool) {
+	for _, keyPattern := range e.keyPatterns {
+		index := len(memory)
+
+		for {
+			select {
+			case <-ctx.Done():
+				return "", false
+			default:
+			}
+
+			// Find pattern from end to beginning
+			index = bytes.LastIndex(memory[:index], keyPattern.Pattern)
+			if index == -1 {
+				break // No more matches found
+			}
+
+			// Check if we have enough space for the key
+			keyOffset := index + keyPattern.Offset
+			if keyOffset < 0 || keyOffset+32 > len(memory) {
+				index -= 1
+				continue
+			}
+
+			// Extract the key data, which is 16 bytes after the pattern and 32 bytes long
+			keyData := memory[keyOffset : keyOffset+32]
+
+			// Validate key against database header
+			if e.validator.Validate(keyData) {
+				log.Debug().
+					Str("pattern", hex.EncodeToString(keyPattern.Pattern)).
+					Int("offset", keyPattern.Offset).
+					Str("key", hex.EncodeToString(keyData)).
+					Msg("Key found")
+				return hex.EncodeToString(keyData), true
+			}
+
+			index -= 1
+		}
+	}
+
+	return "", false
+}
+
 func (e *V4Extractor) SetValidate(validator *decrypt.Validator) {
 	e.validator = validator
 }
+
+type KeyPatternInfo struct {
+	Pattern []byte
+	Offset  int
+}

internal/wechat/key/extractor.go

@@ -15,6 +15,9 @@ type Extractor interface {
 	// Extract 从进程中提取密钥
 	Extract(ctx context.Context, proc *model.Process) (string, error)
 
+	// SearchKey 在内存中搜索密钥
+	SearchKey(ctx context.Context, memory []byte) (string, bool)
+
 	SetValidate(validator *decrypt.Validator)
 }
 

internal/wechat/key/windows/v3.go

@@ -1,6 +1,8 @@
 package windows
 
 import (
+	"context"
+
 	"github.com/sjzar/chatlog/internal/wechat/decrypt"
 )
 
@@ -12,6 +14,11 @@ func NewV3Extractor() *V3Extractor {
 	return &V3Extractor{}
 }
 
+func (e *V3Extractor) SearchKey(ctx context.Context, memory []byte) (string, bool) {
+	// TODO : Implement the key search logic for V3
+	return "", false
+}
+
 func (e *V3Extractor) SetValidate(validator *decrypt.Validator) {
 	e.validator = validator
 }

internal/wechat/key/windows/v4.go

@@ -1,6 +1,8 @@
 package windows
 
 import (
+	"context"
+
 	"github.com/sjzar/chatlog/internal/wechat/decrypt"
 )
 
@@ -12,6 +14,11 @@ func NewV4Extractor() *V4Extractor {
 	return &V4Extractor{}
 }
 
+func (e *V4Extractor) SearchKey(ctx context.Context, memory []byte) (string, bool) {
+	// TODO : Implement the key search logic for V4
+	return "", false
+}
+
 func (e *V4Extractor) SetValidate(validator *decrypt.Validator) {
 	e.validator = validator
 }

internal/wechat/process/darwin/detector.go

@@ -15,10 +15,10 @@ import (
 )
 
 const (
-	V3ProcessName = "WeChat"
+	ProcessNameOfficial = "WeChat"
-	V4ProcessName = "Weixin"
+	ProcessNameBeta     = "Weixin"
-	V3DBFile      = "Message/msg_0.db"
+	V3DBFile            = "Message/msg_0.db"
-	V4DBFile      = "db_storage/message/message_0.db"
+	V4DBFile            = "db_storage/session/session.db"
 )
 
 // Detector 实现 macOS 平台的进程检测器
@@ -40,7 +40,7 @@ func (d *Detector) FindProcesses() ([]*model.Process, error) {
 	var result []*model.Process
 	for _, p := range processes {
 		name, err := p.Name()
-		if err != nil || (name != V3ProcessName && name != V4ProcessName) {
+		if err != nil || (name != ProcessNameOfficial && name != ProcessNameBeta) {
 			continue
 		}
 

internal/wechat/wechat.go

@@ -90,7 +90,7 @@ func (a *Account) GetKey(ctx context.Context) (string, error) {
 		return "", err
 	}
 
-	validator, err := decrypt.NewValidator(process.DataDir, process.Platform, process.Version)
+	validator, err := decrypt.NewValidator(process.Platform, process.Version, process.DataDir)
 	if err != nil {
 		return "", err
 	}