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Encrypt: use OpenSSL's EVP interface, which supports AES-NI without the need of another library

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This commit is contained in:
Davide Beatrici 2018-04-20 17:11:07 +02:00
parent 1e8cf1dc5d
commit a7be140f85
5 changed files with 137 additions and 128 deletions
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12
src/Cedar/Server.c
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@ -5946,9 +5946,6 @@ void SiLoadServerCfg(SERVER *s, FOLDER *f)
// Disable the NAT-traversal feature
s->DisableNatTraversal = CfgGetBool(f, "DisableNatTraversal");
// Intel AES
s->DisableIntelAesAcceleration = CfgGetBool(f, "DisableIntelAesAcceleration");
if (s->Cedar->Bridge == false)
{
// Enable the VPN-over-ICMP
@ -6372,9 +6369,6 @@ void SiWriteServerCfg(FOLDER *f, SERVER *s)
CfgAddBool(f, "EnableVpnOverDns", s->EnableVpnOverDns);
}
// Intel AES
CfgAddBool(f, "DisableIntelAesAcceleration", s->DisableIntelAesAcceleration);
if (c->Bridge == false)
{
OPENVPN_SSTP_CONFIG config;
@ -10982,12 +10976,6 @@ SERVER *SiNewServerEx(bool bridge, bool in_client_inner_server, bool relay_serve
SetFifoCurrentReallocMemSize(MEM_FIFO_REALLOC_MEM_SIZE);
if (s->DisableIntelAesAcceleration)
{
// Disable the Intel AES acceleration
DisableIntelAesAccel();
}
// Raise the priority
if (s->NoHighPriorityProcess == false)
{

1
src/Cedar/Server.h
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@ -293,7 +293,6 @@ struct SERVER
bool DisableNatTraversal; // Disable the NAT-traversal feature
bool EnableVpnOverIcmp; // VPN over ICMP is enabled
bool EnableVpnOverDns; // VPN over DNS is enabled
bool DisableIntelAesAcceleration; // Disable the Intel AES acceleration
bool NoMoreSave; // Do not save any more
bool EnableConditionalAccept; // Apply the Conditional Accept the Listener
bool EnableLegacySSL; // Enable Legacy SSL

238
src/Mayaqua/Encrypt.c
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@ -145,9 +145,11 @@
#include <openssl/x509v3.h>
#include <Mayaqua/Mayaqua.h>
#ifdef USE_INTEL_AESNI_LIBRARY
#include <intelaes/iaesni.h>
#endif // USE_INTEL_AESNI_LIBRARY
#ifdef _MSC_VER
#include <intrin.h> // For __cpuid()
#else
#include <cpuid.h> // For __get_cpuid()
#endif
LOCK *openssl_lock = NULL;
@ -156,7 +158,6 @@ int ssl_clientcert_index = 0;
LOCK **ssl_lock_obj = NULL;
UINT ssl_lock_num;
static bool openssl_inited = false;
static bool is_intel_aes_supported = false;
static unsigned char *Internal_SHA0(const unsigned char *d, size_t n, unsigned char *md);
@ -3662,7 +3663,6 @@ void InitCryptLibrary()
{
char tmp[16];
CheckIfIntelAesNiSupportedInit();
// RAND_Init_For_SoftEther()
openssl_lock = NewLock();
SSL_library_init();
@ -4106,135 +4106,171 @@ void AesFreeKey(AES_KEY_VALUE *k)
// AES encryption
void AesEncrypt(void *dest, void *src, UINT size, AES_KEY_VALUE *k, void *ivec)
{
UCHAR ivec_copy[AES_IV_SIZE];
EVP_CIPHER_CTX *ctx = NULL;
int dest_len = 0;
int len = 0;
int ret = 0;
// Validate arguments
if (dest == NULL || src == NULL || size == 0 || k == NULL || ivec == NULL)
{
return;
}
#ifdef USE_INTEL_AESNI_LIBRARY
if (is_intel_aes_supported)
// Create and initialize the context
ctx = EVP_CIPHER_CTX_new();
if (!ctx)
{
AesEncryptWithIntel(dest, src, size, k, ivec);
ERR_print_errors_fp(stderr);
return;
}
#endif // USE_INTEL_AESNI_LIBRARY
Copy(ivec_copy, ivec, AES_IV_SIZE);
// Disable padding, as it's handled by IkeEncryptWithPadding()
EVP_CIPHER_CTX_set_padding(ctx, false);
AES_cbc_encrypt(src, dest, size, k->EncryptKey, ivec, 1);
// Initialize the encryption operation
switch (k->KeySize)
{
case 16:
ret = EVP_EncryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, k->KeyValue, ivec);
break;
case 24:
ret = EVP_EncryptInit_ex(ctx, EVP_aes_192_cbc(), NULL, k->KeyValue, ivec);
break;
case 32:
ret = EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, k->KeyValue, ivec);
break;
}
if (ret != 1)
{
ERR_print_errors_fp(stderr);
EVP_CIPHER_CTX_free(ctx);
return;
}
// Provide the message to be encrypted and obtain the cipher output
ret = EVP_EncryptUpdate(ctx, dest, &dest_len, src, size);
if (ret != 1)
{
ERR_print_errors_fp(stderr);
EVP_CIPHER_CTX_free(ctx);
return;
}
// Finalize the encryption
ret = EVP_EncryptFinal_ex(ctx, (unsigned char *) dest + dest_len, &len);
if (ret != 1)
{
ERR_print_errors_fp(stderr);
EVP_CIPHER_CTX_free(ctx);
return;
}
dest_len += len;
// Clean up
EVP_CIPHER_CTX_free(ctx);
}
// AES decryption
void AesDecrypt(void *dest, void *src, UINT size, AES_KEY_VALUE *k, void *ivec)
{
UCHAR ivec_copy[AES_IV_SIZE];
EVP_CIPHER_CTX *ctx = NULL;
int dest_len = 0;
int len = 0;
int ret = 0;
// Validate arguments
if (dest == NULL || src == NULL || size == 0 || k == NULL || ivec == NULL)
{
return;
}
#ifdef USE_INTEL_AESNI_LIBRARY
if (is_intel_aes_supported)
// Create and initialize the context
ctx = EVP_CIPHER_CTX_new();
if (!ctx)
{
AesDecryptWithIntel(dest, src, size, k, ivec);
ERR_print_errors_fp(stderr);
return;
}
#endif // USE_INTEL_AESNI_LIBRARY
Copy(ivec_copy, ivec, AES_IV_SIZE);
// Disable padding, as it's handled by IkeEncryptWithPadding()
EVP_CIPHER_CTX_set_padding(ctx, false);
AES_cbc_encrypt(src, dest, size, k->DecryptKey, ivec, 0);
// Initialize the decryption operation
switch (k->KeySize)
{
case 16:
ret = EVP_DecryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, k->KeyValue, ivec);
break;
case 24:
ret = EVP_DecryptInit_ex(ctx, EVP_aes_192_cbc(), NULL, k->KeyValue, ivec);
break;
case 32:
ret = EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, k->KeyValue, ivec);
break;
}
if (ret != 1)
{
ERR_print_errors_fp(stderr);
EVP_CIPHER_CTX_free(ctx);
return;
}
// Provide the message to be decrypted and obtain the plaintext output
ret = EVP_DecryptUpdate(ctx, dest, &dest_len, src, size);
if (ret != 1)
{
ERR_print_errors_fp(stderr);
EVP_CIPHER_CTX_free(ctx);
return;
}
// Finalize the decryption
ret = EVP_DecryptFinal_ex(ctx, (unsigned char *) dest + dest_len, &len);
if (ret != 1)
{
ERR_print_errors_fp(stderr);
EVP_CIPHER_CTX_free(ctx);
return;
}
dest_len += len;
// Clean up
EVP_CIPHER_CTX_free(ctx);
}
// Determine whether the Intel AES-NI is supported
bool IsIntelAesNiSupported()
{
return is_intel_aes_supported;
bool supported = false;
// Unfortunately OpenSSL doesn't provide a function to do it
#ifdef _MSC_VER
int regs[4]; // EAX, EBX, ECX, EDX
__cpuid(regs, 1);
supported = (regs[2] >> 25) & 1;
#else
uint32_t eax, ebx, ecx, edx;
__get_cpuid(1, &eax, &ebx, &ecx, &edx);
supported = (ecx & bit_AES) > 0;
#endif
return supported;
}
void CheckIfIntelAesNiSupportedInit()
{
#ifdef USE_INTEL_AESNI_LIBRARY
if (check_for_aes_instructions())
{
is_intel_aes_supported = true;
}
else
{
is_intel_aes_supported = false;
}
#else // USE_INTEL_AESNI_LIBRARY
is_intel_aes_supported = false;
#endif // USE_INTEL_AESNI_LIBRARY
}
// Disable the Intel AES-NI
void DisableIntelAesAccel()
{
is_intel_aes_supported = false;
}
#ifdef USE_INTEL_AESNI_LIBRARY
// Encrypt AES using the Intel AES-NI
void AesEncryptWithIntel(void *dest, void *src, UINT size, AES_KEY_VALUE *k, void *ivec)
{
UCHAR ivec_copy[AES_IV_SIZE];
// Validate arguments
if (dest == NULL || src == NULL || size == 0 || k == NULL || ivec == NULL)
{
return;
}
Copy(ivec_copy, ivec, AES_IV_SIZE);
switch (k->KeySize)
{
case 16:
intel_AES_enc128_CBC(src, dest, k->KeyValue, (size / AES_IV_SIZE), ivec_copy);
break;
case 24:
intel_AES_enc192_CBC(src, dest, k->KeyValue, (size / AES_IV_SIZE), ivec_copy);
break;
case 32:
intel_AES_enc256_CBC(src, dest, k->KeyValue, (size / AES_IV_SIZE), ivec_copy);
break;
}
}
// Decrypt AES using the Intel AES-NI
void AesDecryptWithIntel(void *dest, void *src, UINT size, AES_KEY_VALUE *k, void *ivec)
{
UCHAR ivec_copy[AES_IV_SIZE];
// Validate arguments
if (dest == NULL || src == NULL || size == 0 || k == NULL || ivec == NULL)
{
return;
}
Copy(ivec_copy, ivec, AES_IV_SIZE);
switch (k->KeySize)
{
case 16:
intel_AES_dec128_CBC(src, dest, k->KeyValue, (size / AES_IV_SIZE), ivec_copy);
break;
case 24:
intel_AES_dec192_CBC(src, dest, k->KeyValue, (size / AES_IV_SIZE), ivec_copy);
break;
case 32:
intel_AES_dec256_CBC(src, dest, k->KeyValue, (size / AES_IV_SIZE), ivec_copy);
break;
}
}
#endif // USE_INTEL_AESNI_LIBRARY
// Calculation of HMAC-SHA-1
void MacSha1(void *dst, void *key, UINT key_size, void *data, UINT data_size)

8
src/Mayaqua/Encrypt.h
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@ -523,12 +523,6 @@ void AesEncrypt(void *dest, void *src, UINT size, AES_KEY_VALUE *k, void *ivec);
void AesDecrypt(void *dest, void *src, UINT size, AES_KEY_VALUE *k, void *ivec);
bool IsIntelAesNiSupported();
void CheckIfIntelAesNiSupportedInit();
#ifdef USE_INTEL_AESNI_LIBRARY
void AesEncryptWithIntel(void *dest, void *src, UINT size, AES_KEY_VALUE *k, void *ivec);
void AesDecryptWithIntel(void *dest, void *src, UINT size, AES_KEY_VALUE *k, void *ivec);
#endif // USE_INTEL_AESNI_LIBRARY
void OpenSSL_InitLock();
void OpenSSL_FreeLock();
@ -551,8 +545,6 @@ void Enc_tls1_PRF(unsigned char *label, int label_len, const unsigned char *sec,
void HMacSha1(void *dst, void *key, UINT key_size, void *data, UINT data_size);
void HMacMd5(void *dst, void *key, UINT key_size, void *data, UINT data_size);
void DisableIntelAesAccel();
int GetSslClientCertIndex();
#ifdef ENCRYPT_C

6
src/Mayaqua/Mayaqua.h
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@ -215,12 +215,6 @@ int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hPrev, char *CmdLine, int CmdShow)
#define PROBE_DATA(data, size)
#endif // USE_PROBE
// About Intel AES-NI Library
#if (defined(OS_WIN32) || (defined(UNIX_LINUX) && (defined(CPU_X86) || defined(CPU_X64))))
// Supports only for Linux (x86 / x64) or Windows
#define USE_INTEL_AESNI_LIBRARY
#endif
// Determine the performance / memory strategy
#if (defined(CPU_X86) || defined(CPU_X64) || defined(CPU_X86_X64) || defined(CPU_SPARC) || defined(CPU_SPARC64) || defined(OS_WIN32) || defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(i386) || defined(__i386) || defined(__i386__) || defined(__ia64__) || defined(__IA64__) || defined(_IA64))
#define USE_STRATEGY_PERFORMACE