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错误的RSA加密/解密在Windows中使用的CryptoAPI下一代（CNG）？

2011-06-11 22 views
4

我已经写了代码加密和使用所述CNG先前生成的硬编码的RSA密钥对数据进行解密。这是一个简单的程序，只需生成一些随机输入数据，使用公钥对其进行加密，然后使用私钥对生成的加密缓冲区进行解密。我打印所有的输入，中间和输出级来比较解密后的明文是否是相同的原始输入的明文，并重复整个加密 - 解密的10倍。错误的RSA加密/解密在Windows中使用的CryptoAPI下一代（CNG）？

不过，我观察到，在某些情况下，加密和解密都很好，但在其他国家，被解密的明文不输入明文在所有匹配。这些越野车的情况是完全随机的和任意的，这些错误似乎没有任何模式。

这是CNG的RSA实现中的错误还是我错做什么？

代码如下：

#include <windows.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <bcrypt.h> 

#define NT_SUCCESS(Status)   (((NTSTATUS)(Status)) >= 0) 
#define STATUS_UNSUCCESSFUL   ((NTSTATUS)0xC0000001L) 

#define PrivateKeySize 283 
#define PublicKeySize 155 
#define InputDataSize 128 

PUCHAR encryptedBuffer; 
ULONG encryptedBufferSize = 128; 


VOID printMem(PVOID Mem, int length) 
{ 
    int i; 
    for (i = 0; i < length; i++) 
     printf("%02x ", ((unsigned char *)Mem)[i]); 
} 

VOID Decrypt() 
{ 
    unsigned char PrivateKey[PrivateKeySize] = {0x52, 0x53, 0x41, 0x32, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0xB7, 0x50, 0x52, 0xDD, 0x58, 0xE4, 0x96, 0xAF, 0x91, 0xE5, 0xB2, 0x7B, 0x0A, 0xE6, 0xAA, 0x1F, 0x71, 0x8A, 0x66, 0xC3, 0xF0, 0x21, 0xD8, 0xE6, 0x2C, 0xD6, 0x25, 0x2E, 0x77, 0x3C, 0x61, 0x08, 0x1B, 0x69, 0xE7, 0x58, 0xDF, 0x3B, 0x07, 0xFE, 0xF1, 0xDB, 0xBF, 0xA6, 0x35, 0xDF, 0xC7, 0x49, 0x06, 0xC8, 0xDB, 0x74, 0x2A, 0xB9, 0xED, 0xB3, 0x04, 0x80, 0x75, 0x5F, 0x71, 0x2C, 0xD0, 0x14, 0x0E, 0x81, 0x18, 0x00, 0x5E, 0x34, 0x5A, 0xC2, 0x3A, 0x84, 0x63, 0xB1, 0x6B, 0x04, 0x21, 0x49, 0x7F, 0xE0, 0xF3, 0x52, 0x5E, 0x61, 0x43, 0xB1, 0x8F, 0x7C, 0xF2, 0x74, 0x29, 0x28, 0x69, 0x20, 0x36, 0xC0, 0x92, 0x17, 0x42, 0x99, 0x72, 0xE5, 0xE7, 0x82, 0xBE, 0x8E, 0x3B, 0x3F, 0xC9, 0x0A, 0xE1, 0xC4, 0x63, 0x68, 0x73, 0x1D, 0x67, 0x8D, 0xC0, 0xA3, 0xB4, 0xBA, 0xF0, 0xB7, 0xB0, 0x9B, 0xBB, 0x3F, 0xB8, 0x6E, 0xC0, 0x34, 0x1E, 0xA0, 0x01, 0x4B, 0x6D, 0x47, 0x73, 0x3F, 0xA5, 0x39, 0x05, 0x27, 0xD4, 0xD1, 0x38, 0x34, 0x32, 0x2C, 0x5B, 0x03, 0x5F, 0x16, 0x21, 0x64, 0x04, 0xD5, 0x19, 0xDB, 0xE7, 0x80, 0xDA, 0xBD, 0xC4, 0x1E, 0xAB, 0x61, 0xC8, 0x84, 0xDF, 0x54, 0x16, 0x77, 0x98, 0x9B, 0x90, 0x03, 0x83, 0xC4, 0x8D, 0x25, 0xB1, 0x32, 0x67, 0x77, 0x6A, 0x1C, 0x64, 0x2D, 0xFA, 0x9E, 0xB9, 0x26, 0xB5, 0xF8, 0x47, 0x4A, 0x9C, 0x35, 0x89, 0x5F, 0x12, 0x0E, 0xFF, 0x60, 0x87, 0x1E, 0x27, 0xC1, 0xC5, 0x7C, 0x77, 0x0A, 0xAE, 0x11, 0x37, 0xE3, 0x42, 0x9B, 0xAF, 0x9D, 0xBC, 0xC2, 0x52, 0xF8, 0x85, 0xBA, 0xED, 0x8E, 0xC3, 0x73, 0x04, 0x0A, 0x53, 0xD2, 0x1D, 0xEF, 0xA0, 0x6A, 0xCD, 0xBE, 0x93, 0x49, 0x34, 0x3A, 0xBD, 0xDF, 0x6A, 0x33, 0x25, 0x91, 0xFC, 0xE7}; 
    BCRYPT_ALG_HANDLE hAlgorithm = NULL; 
    BCRYPT_KEY_HANDLE hKey = NULL; 
    ULONG plaintextSize = 128; 
    PUCHAR decryptedBuffer; 
    ULONG decryptedBufferSize; 
    NTSTATUS status; 

    status = BCryptOpenAlgorithmProvider(&hAlgorithm, 
              BCRYPT_RSA_ALGORITHM, 
              NULL, 
              0); 
    if (!NT_SUCCESS(status)) { 
     printf("Failed to get algorithm provider..status : %08x\n",status); 
     goto cleanup; 
    } 

    status = BCryptImportKeyPair(hAlgorithm, 
            NULL, 
            BCRYPT_RSAPRIVATE_BLOB, 
            &hKey, 
            PrivateKey, 
            PrivateKeySize, 
            BCRYPT_NO_KEY_VALIDATION); 
    if (!NT_SUCCESS(status)) { 
     printf("Failed to import Private key..status : %08x\n",status); 
     goto cleanup; 
    } 

    status = BCryptDecrypt(hKey, 
          encryptedBuffer, 
          encryptedBufferSize, 
          NULL, 
          NULL, 
          0, 
          NULL, 
          0, 
          &decryptedBufferSize, 
          0); 
    if (!NT_SUCCESS(status)) { 
     printf("Failed to get required size of buffer..status : %08x\n", status); 
     goto cleanup; 
    } 

    decryptedBuffer = (PUCHAR)HeapAlloc (GetProcessHeap(), 0, decryptedBufferSize); 
    if (decryptedBuffer == NULL) { 
     printf("failed to allocate memory for buffer\n"); 
     goto cleanup; 
    } 

    status = BCryptDecrypt(hKey, 
          encryptedBuffer, 
          encryptedBufferSize, 
          NULL, 
          NULL, 
          0, 
          decryptedBuffer, 
          decryptedBufferSize, 
          &decryptedBufferSize, 
          0); 
    if (!NT_SUCCESS(status)) { 
     printf("Failed decrypt buffer..status : %08x\n",status); 
     goto cleanup; 
    } 

    printf("Decrypted buffer\n"); 
    printMem(decryptedBuffer, decryptedBufferSize); 
    printf("\n\n"); 

cleanup: 
    HeapFree(GetProcessHeap(), 0, decryptedBuffer); 

    BCryptDestroyKey(hKey); 

    BCryptCloseAlgorithmProvider(hAlgorithm, 0); 
} 


VOID Encrypt() 
{ 
    unsigned char PublicKey[PublicKeySize] = {0x52, 0x53, 0x41, 0x31, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0xB7, 0x50, 0x52, 0xDD, 0x58, 0xE4, 0x96, 0xAF, 0x91, 0xE5, 0xB2, 0x7B, 0x0A, 0xE6, 0xAA, 0x1F, 0x71, 0x8A, 0x66, 0xC3, 0xF0, 0x21, 0xD8, 0xE6, 0x2C, 0xD6, 0x25, 0x2E, 0x77, 0x3C, 0x61, 0x08, 0x1B, 0x69, 0xE7, 0x58, 0xDF, 0x3B, 0x07, 0xFE, 0xF1, 0xDB, 0xBF, 0xA6, 0x35, 0xDF, 0xC7, 0x49, 0x06, 0xC8, 0xDB, 0x74, 0x2A, 0xB9, 0xED, 0xB3, 0x04, 0x80, 0x75, 0x5F, 0x71, 0x2C, 0xD0, 0x14, 0x0E, 0x81, 0x18, 0x00, 0x5E, 0x34, 0x5A, 0xC2, 0x3A, 0x84, 0x63, 0xB1, 0x6B, 0x04, 0x21, 0x49, 0x7F, 0xE0, 0xF3, 0x52, 0x5E, 0x61, 0x43, 0xB1, 0x8F, 0x7C, 0xF2, 0x74, 0x29, 0x28, 0x69, 0x20, 0x36, 0xC0, 0x92, 0x17, 0x42, 0x99, 0x72, 0xE5, 0xE7, 0x82, 0xBE, 0x8E, 0x3B, 0x3F, 0xC9, 0x0A, 0xE1, 0xC4, 0x63, 0x68, 0x73, 0x1D, 0x67, 0x8D, 0xC0, 0xA3, 0xB4, 0xBA, 0xF0, 0xB7, 0xB0, 0x9B}; 
    unsigned char InputData[InputDataSize]; 
    BCRYPT_ALG_HANDLE hAlgorithm = NULL; 
    BCRYPT_KEY_HANDLE hKey = NULL; 
    NTSTATUS status; 

    for (int i=0; i<128; i++) 
     InputData[i] = (unsigned char)rand(); 

    printf("Random Data is \n"); 
    printMem(InputData, InputDataSize); 
    printf("\n\n"); 

    status = BCryptOpenAlgorithmProvider( &hAlgorithm, 
              BCRYPT_RSA_ALGORITHM, 
              NULL, 
              0); 
    if (!NT_SUCCESS(status)) { 
     printf("Failed to get algorithm provider..status : %08x\n",status); 
     goto cleanup; 
    } 

    status = BCryptImportKeyPair(hAlgorithm, 
            NULL, 
            BCRYPT_RSAPUBLIC_BLOB, 
            &hKey, 
            PublicKey, 
            155, 
            BCRYPT_NO_KEY_VALIDATION); 
    if (!NT_SUCCESS(status)) { 
     printf("Failed to import Private key..status : %08x\n",status); 
     goto cleanup; 

    } 

    status = BCryptEncrypt(hKey, 
          InputData, 
          InputDataSize, 
          NULL, 
          NULL, 
          0, 
          NULL, 
          0, 
          &encryptedBufferSize, 
          0 
          ); 
    if (!NT_SUCCESS(status)) { 
     printf("Failed to get required size of buffer..status : %08x\n",status); 
     goto cleanup; 
    } 

    encryptedBuffer = (PUCHAR)HeapAlloc (GetProcessHeap(), 0, encryptedBufferSize); 

    if (encryptedBuffer == NULL) { 
     printf("failed to allocate memory for blindedFEKBuffer\n"); 
     goto cleanup; 
    } 

    status = BCryptEncrypt(hKey, 
          InputData, 
          InputDataSize, 
          NULL, 
          NULL, 
          0, 
          encryptedBuffer, 
          encryptedBufferSize, 
          &encryptedBufferSize, 
          0 
          ); 

    if (!NT_SUCCESS(status)) { 
     printf("Failed encrypt data..status : %08x\n",status); 
     goto cleanup; 
    } 

printf("Encrypted Data\n"); 
printMem(encryptedBuffer, encryptedBufferSize); 
printf("\n\n"); 

cleanup: 
      if(hKey) 
       BCryptDestroyKey(hKey); 
      if(hAlgorithm) 
       BCryptCloseAlgorithmProvider(hAlgorithm, 0); 
} 


int __cdecl wmain(
        int argc, 
        __in_ecount(argc) LPWSTR *wargv) 
{ 

    int i; 
    for (i=0; i<10; i++) 
    { 
     Encrypt(); 
     Decrypt(); 
    } 

}

来源

2011-06-11 Dhirendra

+1

作为一般规则，它比代码库中的问题更可能成为代码中的问题。 – 2011-06-11 16:05:12

回答

-1

是否有可能从通过您的问题源于一个NULL四BCryptEncrypt作为对社区笔记在底部说：

BCryptEncrypt function

来源

2014-08-26 20:37:16 Bob77

-1

我想你的代码，如果我做的产生InputData静态而不乱，如：

ZeroMemory(InputData, InputDataSize); 
std::string strInput = "This is just a test with a long long... very long string"; 
for(int i = 0; i < (int)strInput.size(); i++) 
{ 
    InputData[i] = strInput[i]; 
}

它不会返回任何错误，我认为rand（）的极端值有问题。

来源

2014-11-21 15:56:01 rhedin

1

这不是CNG中的错误，它是原始RSA加密工作方式的一个缺陷。您正在加密的一些随机值大于密钥的模数（模数是RSA密钥中的两个素数相乘的值），这意味着数值环绕（如果您设置了InputData[0] = 0，您将看到输入和输出总是匹配）。

你也想成为或者通过BCRYPT_PAD_PKCS1或BCRYPT_PAD_OAEP到BCryptEncrypt/BCryptDecrypt dwFlags参数为原料的RSA加密是不安全的。如果您使用BCRYPT_PAD_OAEP，则还需要提供BCRYPT_OAEP_PADDING_INFO structure。

来源

2015-01-23 15:09:34 softwariness

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