refactor: format code with interface Closes #13

core/decrypt/decrypt_linux.go

@@ -0,0 +1,174 @@
+package decrypt
+
+import (
+	"crypto/hmac"
+	"crypto/sha1"
+	"crypto/sha256"
+	"encoding/asn1"
+	"encoding/hex"
+	"hack-browser-data/log"
+
+	"golang.org/x/crypto/pbkdf2"
+)
+
+const (
+	fireFoxProfilePath = "/home/*/.mozilla/firefox/*.default-release/"
+	fireFoxCommand     = ""
+)
+
+var (
+	chromeIV   = []byte{32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32}
+	chromeSalt = []byte("saltysalt")
+)
+
+func ChromePass(key, encryptPass []byte) ([]byte, error) {
+	if len(encryptPass) > 3 {
+		if len(key) == 0 {
+			return nil, errKeyIsEmpty
+		}
+		m, err := aes128CBCDecrypt(key, chromeIV, encryptPass[3:])
+		return m, err
+	} else {
+		return nil, errDecryptFailed
+	}
+}
+
+func DPApi(data []byte) ([]byte, error) {
+	return nil, nil
+}
+
+/*
+SEQUENCE (2 elem)
+	SEQUENCE (2 elem)
+		OBJECT IDENTIFIER
+		SEQUENCE (2 elem)
+			OCTET STRING (20 byte)
+			INTEGER 1
+	OCTET STRING (16 byte)
+*/
+
+type MetaPBE struct {
+	SequenceA
+	Encrypted []byte
+}
+
+type SequenceA struct {
+	DecryptMethod asn1.ObjectIdentifier
+	SequenceB
+}
+
+type SequenceB struct {
+	EntrySalt []byte
+	Len       int
+}
+
+type NssPBE struct {
+	SequenceNSSA
+	Encrypted []byte
+}
+
+type SequenceNSSA struct {
+	PKCS5PBES2 asn1.ObjectIdentifier
+	SequenceNSSB
+}
+type SequenceNSSB struct {
+	SequenceC
+	SequenceD
+}
+
+type SequenceC struct {
+	PKCS5PBKDF2 asn1.ObjectIdentifier
+	SequenceE
+}
+
+type SequenceD struct {
+	AES256CBC asn1.ObjectIdentifier
+	IV        []byte
+}
+
+type SequenceE struct {
+	EntrySalt      []byte
+	IterationCount int
+	KeySize        int
+	SequenceF
+}
+
+type SequenceF struct {
+	HMACWithSHA256 asn1.ObjectIdentifier
+}
+
+func DecodeMeta(decodeItem []byte) (pbe MetaPBE, err error) {
+	_, err = asn1.Unmarshal(decodeItem, &pbe)
+	if err != nil {
+		log.Error(err)
+		return
+	}
+	return
+}
+
+func DecodeNss(nssA11Bytes []byte) (pbe NssPBE, err error) {
+	log.Debug(hex.EncodeToString(nssA11Bytes))
+	_, err = asn1.Unmarshal(nssA11Bytes, &pbe)
+	if err != nil {
+		log.Error(err)
+		return
+	}
+	return
+}
+
+func Meta(globalSalt, masterPwd []byte, pbe MetaPBE) ([]byte, error) {
+	return decryptMeta(globalSalt, masterPwd, pbe.EntrySalt, pbe.Encrypted)
+}
+
+func Nss(globalSalt, masterPwd []byte, pbe NssPBE) ([]byte, error) {
+	return decryptNss(globalSalt, masterPwd, pbe.IV, pbe.EntrySalt, pbe.Encrypted, pbe.IterationCount, pbe.KeySize)
+}
+
+func decryptMeta(globalSalt, masterPwd, entrySalt, encrypted []byte) ([]byte, error) {
+	//byte[] GLMP; // GlobalSalt + MasterPassword
+	//byte[] HP; // SHA1(GLMP)
+	//byte[] HPES; // HP + EntrySalt
+	//byte[] CHP; // SHA1(HPES)
+	//byte[] PES; // EntrySalt completed to 20 bytes by zero
+	//byte[] PESES; // PES + EntrySalt
+	//byte[] k1;
+	//byte[] tk;
+	//byte[] k2;
+	//byte[] k; // final value conytaining key and iv
+	glmp := append(globalSalt, masterPwd...)
+	hp := sha1.Sum(glmp)
+	s := append(hp[:], entrySalt...)
+	chp := sha1.Sum(s)
+	pes := PaddingZero(entrySalt, 20)
+	tk := hmac.New(sha1.New, chp[:])
+	tk.Write(pes)
+	pes = append(pes, entrySalt...)
+	k1 := hmac.New(sha1.New, chp[:])
+	k1.Write(pes)
+	tkPlus := append(tk.Sum(nil), entrySalt...)
+	k2 := hmac.New(sha1.New, chp[:])
+	k2.Write(tkPlus)
+	k := append(k1.Sum(nil), k2.Sum(nil)...)
+	iv := k[len(k)-8:]
+	key := k[:24]
+	log.Warnf("key=%s iv=%s", hex.EncodeToString(key), hex.EncodeToString(iv))
+	return Des3Decrypt(key, iv, encrypted)
+}
+
+func decryptNss(globalSalt, masterPwd, nssIv, entrySalt, encrypted []byte, iter, keySize int) ([]byte, error) {
+	k := sha1.Sum(globalSalt)
+	log.Println(hex.EncodeToString(k[:]))
+	key := pbkdf2.Key(k[:], entrySalt, iter, keySize, sha256.New)
+	log.Println(hex.EncodeToString(key))
+	i, err := hex.DecodeString("040e")
+	if err != nil {
+		log.Println(err)
+	}
+	// @https://hg.mozilla.org/projects/nss/rev/fc636973ad06392d11597620b602779b4af312f6#l6.49
+	iv := append(i, nssIv...)
+	dst, err := aes128CBCDecrypt(key, iv, encrypted)
+	if err != nil {
+		log.Println(err)
+	}
+	return dst, err
+}