我正在尝试使用Windows中提供的加密/解密功能。
我在PuTTYgen中生成了RSA密钥对，提取了私钥和公钥以分离pem文件。然后，我使用OpenSSL通过加密然后解密一些消息来测试那些密钥。
openssl.exe rsautl -in input.txt -out encrypted.bin -inkey public_key_4096_puttygen.pem -encrypt -oaep -pubin
openssl.exe rsautl -in encrypted.bin -out decrypted.txt -inkey private_key_4096_puttygen.pem -decrypt -oaep
在这一步，一切都很好。
然后，我将私钥数据放入用Visual Studio C ++编写的示例C ++程序中。我调用以下函数：CryptAcquireContext，CryptImportKey，CryptEncrypt和CryptDecrypt，以测试加密/解密链。一切都还好。
最后，我要用openssl命令加密一些数据，并尝试在具有上述功能的C ++程序中对其解密。并且CryptDecrypt返回FALSE（GetLastError返回ERROR_INVALID_PARAMETER）。
这是程序代码：
#include "windows.h"
#include "stdio.h"
#define KEY_BUFFER_LENGTH (8 * 1024)
void main()
{
LPCSTR encryptedBase64 = "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";
HCRYPTPROV provider;
BYTE privKey[] = {0x30, 0x82, 0x09, 0x26, 0x02, 0x01, 0x00, 0x02, 0x82, 0x02, 0x01, 0x00, 0xAE, 0xFF, 0x2C, 0x1E, 0xBD, 0x7A, 0xF3, 0xC0, 0x71, 0x56, 0x6D, 0x4C, 0x54, 0x59, 0x77, 0xCE, 0x88, 0xFB, 0x59, 0xB9, 0xB7, 0xDA, 0xB8, 0xCA, 0xBB, 0x67, 0x05, 0xF0, 0x50, 0xB6, 0x6C, 0x41, 0xE3, 0xB9, 0x7E, 0x36, 0xA3, 0x49, 0x13, 0x42, 0xA9, 0xBB, 0x51, 0x02, 0x97, 0xB2, 0xBF, 0x76, 0xB6, 0xFA, 0x1E, 0xCE, 0x00, 0xE7, 0xA7, 0xF8, 0xE2, 0x00, 0x08, 0x96, 0xE0, 0x9F, 0x21, 0x71, 0xAB, 0x48, 0xCB, 0xC6, 0x83, 0x63, 0xBE, 0xB9, 0x0F, 0x89, 0x66, 0x70, 0x58, 0x40, 0xC1, 0x8E, 0xAC, 0xC8, 0xE1, 0x97, 0xCF, 0x40, 0xE9, 0xE5, 0xE5, 0x35, 0x71, 0xB2, 0x28, 0xA6, 0x00, 0x2A, 0xC6, 0x39, 0x59, 0x6F, 0x81, 0xFB, 0xFC, 0x7A, 0xAC, 0x24, 0xAF, 0xB2, 0x9D, 0xFD, 0xAD, 0x91, 0xCE, 0xC8, 0xD2, 0x9E, 0x4A, 0xE2, 0x33, 0xA4, 0xB3, 0x37, 0x25, 0x41, 0x21, 0x4C, 0x8D, 0xB3, 0x9A, 0xB7, 0x96, 0x35, 0xF2, 0x95, 0x7B, 0x8A, 0x0F, 0x8E, 0x37, 0xA2, 0x15, 0xFE, 0x6B, 0xC1, 0x7D, 0x51, 0xA3, 0xE3, 0xC4, 0x13, 0xE8, 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DWORD keyBufferLength = sizeof(privKey);
CHAR encrypted[KEY_BUFFER_LENGTH];
DWORD encryptedLength = KEY_BUFFER_LENGTH;
CryptStringToBinaryA(encryptedBase64, strlen(encryptedBase64), CRYPT_STRING_BASE64, (LPBYTE)encrypted, &encryptedLength, NULL, NULL);
if (CryptAcquireContextA(&provider, NULL, MS_ENHANCED_PROV_A, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT) == TRUE)
{
DWORD derSize = 0;
BYTE *privateKeyInfo;
if (CryptDecodeObjectEx(X509_ASN_ENCODING, PKCS_RSA_PRIVATE_KEY, privKey, keyBufferLength, CRYPT_DECODE_ALLOC_FLAG, NULL, &privateKeyInfo, &derSize) != FALSE)
{
HCRYPTKEY key = 0;
if (CryptImportKey(provider, privateKeyInfo, derSize, 0, CRYPT_EXPORTABLE | CRYPT_OAEP, &key) != FALSE)
{
if (CryptDecrypt(key, NULL, TRUE, CRYPT_OAEP, (LPBYTE) encrypted, &encryptedLength) != FALSE)
{
encrypted[encryptedLength] = '\0';
printf("%s\n", encrypted);
}
else
{
DWORD error = GetLastError();
printf("%d\n", error);
}
CryptDestroyKey(key);
}
LocalFree(privateKeyInfo);
}
CryptReleaseContext(provider, 0);
}
}
请问，这段代码有什么问题吗？