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-rw-r--r--src/keyDerivation.cpp92
1 files changed, 51 insertions, 41 deletions
diff --git a/src/keyDerivation.cpp b/src/keyDerivation.cpp
index 25b7cf0..fac1da6 100644
--- a/src/keyDerivation.cpp
+++ b/src/keyDerivation.cpp
@@ -11,7 +11,7 @@
* tunneling and relaying of packets of any protocol.
*
*
- * Copyright (C) 2007-2009 Othmar Gsenger, Erwin Nindl,
+ * Copyright (C) 2007-2009 Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
@@ -126,34 +126,31 @@ satp_prf_label_t KeyDerivation::convertLabel(kd_dir_t dir, satp_prf_label_t labe
switch(label) {
case LABEL_ENC: {
if(dir == KD_OUTBOUND) {
- if(role_ == ROLE_LEFT) return LABEL_LEFT_ENC;
- if(role_ == ROLE_RIGHT) return LABEL_RIGHT_ENC;
- }
- else {
- if(role_ == ROLE_LEFT) return LABEL_RIGHT_ENC;
- if(role_ == ROLE_RIGHT) return LABEL_LEFT_ENC;
+ if(role_ == ROLE_LEFT) { return LABEL_LEFT_ENC; }
+ if(role_ == ROLE_RIGHT) { return LABEL_RIGHT_ENC; }
+ } else {
+ if(role_ == ROLE_LEFT) { return LABEL_RIGHT_ENC; }
+ if(role_ == ROLE_RIGHT) { return LABEL_LEFT_ENC; }
}
break;
}
case LABEL_SALT: {
if(dir == KD_OUTBOUND) {
- if(role_ == ROLE_LEFT) return LABEL_LEFT_SALT;
- if(role_ == ROLE_RIGHT) return LABEL_RIGHT_SALT;
- }
- else {
- if(role_ == ROLE_LEFT) return LABEL_RIGHT_SALT;
- if(role_ == ROLE_RIGHT) return LABEL_LEFT_SALT;
+ if(role_ == ROLE_LEFT) { return LABEL_LEFT_SALT; }
+ if(role_ == ROLE_RIGHT) { return LABEL_RIGHT_SALT; }
+ } else {
+ if(role_ == ROLE_LEFT) { return LABEL_RIGHT_SALT; }
+ if(role_ == ROLE_RIGHT) { return LABEL_LEFT_SALT; }
}
break;
}
case LABEL_AUTH: {
if(dir == KD_OUTBOUND) {
- if(role_ == ROLE_LEFT) return LABEL_LEFT_AUTH;
- if(role_ == ROLE_RIGHT) return LABEL_RIGHT_AUTH;
- }
- else {
- if(role_ == ROLE_LEFT) return LABEL_RIGHT_AUTH;
- if(role_ == ROLE_RIGHT) return LABEL_LEFT_AUTH;
+ if(role_ == ROLE_LEFT) { return LABEL_LEFT_AUTH; }
+ if(role_ == ROLE_RIGHT) { return LABEL_RIGHT_AUTH; }
+ } else {
+ if(role_ == ROLE_LEFT) { return LABEL_RIGHT_AUTH; }
+ if(role_ == ROLE_RIGHT) { return LABEL_LEFT_AUTH; }
}
break;
}
@@ -173,19 +170,21 @@ bool NullKeyDerivation::generate(kd_dir_t dir, satp_prf_label_t label, seq_nr_t
#ifndef NO_CRYPT
//****** AesIcmKeyDerivation ******
-AesIcmKeyDerivation::AesIcmKeyDerivation() : KeyDerivation(DEFAULT_KEY_LENGTH)
+AesIcmKeyDerivation::AesIcmKeyDerivation() : KeyDerivation(DEFAULT_KEY_LENGTH)
{
#ifndef USE_SSL_CRYPTO
- for(int i=0; i<2; i++)
+ for(int i=0; i<2; i++) {
handle_[i] = NULL;
+ }
#endif
}
-AesIcmKeyDerivation::AesIcmKeyDerivation(u_int16_t key_length) : KeyDerivation(key_length)
+AesIcmKeyDerivation::AesIcmKeyDerivation(u_int16_t key_length) : KeyDerivation(key_length)
{
#ifndef USE_SSL_CRYPTO
- for(int i=0; i<2; i++)
+ for(int i=0; i<2; i++) {
handle_[i] = NULL;
+ }
#endif
}
@@ -194,8 +193,9 @@ AesIcmKeyDerivation::~AesIcmKeyDerivation()
WritersLock lock(mutex_);
#ifndef USE_SSL_CRYPTO
for(int i=0; i<2; i++)
- if(handle_[i])
+ if(handle_[i]) {
gcry_cipher_close(handle_[i]);
+ }
#endif
}
@@ -205,15 +205,17 @@ void AesIcmKeyDerivation::init(Buffer key, Buffer salt, std::string passphrase)
is_initialized_ = false;
#ifndef NO_PASSPHRASE
- if(passphrase != "" && !key.getLength())
+ if(passphrase != "" && !key.getLength()) {
calcMasterKey(passphrase, key_length_/8);
- else
+ } else {
master_key_ = SyncBuffer(key);
-
- if(passphrase != "" && !salt.getLength())
+ }
+
+ if(passphrase != "" && !salt.getLength()) {
calcMasterSalt(passphrase, SALT_LENGTH);
- else
+ } else {
master_salt_ = SyncBuffer(salt);
+ }
#else
master_key_ = SyncBuffer(key);
master_salt_ = SyncBuffer(salt);
@@ -237,9 +239,15 @@ void AesIcmKeyDerivation::updateMasterKey()
#ifndef USE_SSL_CRYPTO
int algo;
switch(key_length_) {
- case 128: algo = GCRY_CIPHER_AES128; break;
- case 192: algo = GCRY_CIPHER_AES192; break;
- case 256: algo = GCRY_CIPHER_AES256; break;
+ case 128:
+ algo = GCRY_CIPHER_AES128;
+ break;
+ case 192:
+ algo = GCRY_CIPHER_AES192;
+ break;
+ case 256:
+ algo = GCRY_CIPHER_AES256;
+ break;
default: {
cLog.msg(Log::PRIO_ERROR) << "KeyDerivation::updateMasterKey: cipher key length of " << key_length_ << " Bits is not supported";
return;
@@ -247,15 +255,16 @@ void AesIcmKeyDerivation::updateMasterKey()
}
for(int i=0; i<2; i++) {
- if(handle_[i])
+ if(handle_[i]) {
gcry_cipher_close(handle_[i]);
-
+ }
+
gcry_error_t err = gcry_cipher_open(&handle_[i], algo, GCRY_CIPHER_MODE_CTR, 0);
if(err) {
cLog.msg(Log::PRIO_ERROR) << "KeyDerivation::updateMasterKey: Failed to open cipher: " << AnytunGpgError(err);
return;
- }
-
+ }
+
err = gcry_cipher_setkey(handle_[i], master_key_.getBuf(), master_key_.getLength());
if(err) {
cLog.msg(Log::PRIO_ERROR) << "KeyDerivation::updateMasterKey: Failed to set cipher key: " << AnytunGpgError(err);
@@ -274,7 +283,7 @@ void AesIcmKeyDerivation::updateMasterKey()
is_initialized_ = true;
}
-std::string AesIcmKeyDerivation::printType()
+std::string AesIcmKeyDerivation::printType()
{
ReadersLock lock(mutex_);
@@ -297,17 +306,18 @@ bool AesIcmKeyDerivation::calcCtr(kd_dir_t dir, satp_prf_label_t label, seq_nr_t
return true;
}
-bool AesIcmKeyDerivation::generate(kd_dir_t dir, satp_prf_label_t label, seq_nr_t seq_nr, Buffer& key)
+bool AesIcmKeyDerivation::generate(kd_dir_t dir, satp_prf_label_t label, seq_nr_t seq_nr, Buffer& key)
{
ReadersLock lock(mutex_);
- if(!is_initialized_)
+ if(!is_initialized_) {
return false;
+ }
if(!calcCtr(dir, label, seq_nr)) {
return false;
}
-
+
#ifndef USE_SSL_CRYPTO
gcry_error_t err = gcry_cipher_reset(handle_[dir]);
if(err) {
@@ -335,7 +345,7 @@ bool AesIcmKeyDerivation::generate(kd_dir_t dir, satp_prf_label_t label, seq_nr_
std::memset(key.getBuf(), 0, key.getLength());
AES_ctr128_encrypt(key.getBuf(), key.getBuf(), key.getLength(), &aes_key_[dir], ctr_[dir].buf_, ecount_buf_[dir], &num);
#endif
-
+
return true;
}
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-26 10:14:18 +0000