C# 使用公共 RSA-1280 十六进制密钥加密字符串
我一直在尝试使用服务器发送给我的 RSA 公钥来加密密码。
var csp = new CspParameters(1, "Microsoft Strong Cryptographic Provider");
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(1280, csp);
byte[] key = ByteUtils.HexToBytes(client.RSAKey);
RSA.ImportCspBlob(key);
byte[] encrypted = RSA.Encrypt(Encoding.ASCII.GetBytes(password), true);
十六进制密钥以这种格式提供:
string key = "30819D300D06092A864886F70D010101050003818B0030818702818100C7BD672D8C634D443840AD809790852770D3A2E99F456D6516329E0205D0645C23FD001D4D070CEE368A20526FEB2402358C915D7E86102B1659AA8651C449C344599F72BE904B8E338E7002E9978453C5BBCCA51AC165AA265069E0EAB1411D11A2FFDD35E5A8296A6A2AF238945874E8206979B0A16E2E4260A161CAB5C905020111";
由于十六进制格式的字符串长度为 320 字节,因此我假设密钥为 160 字节(RSA 1280) 使用此方法,提供程序不断显示“提供程序版本错误。\r\n”。 我尝试了几种方法,将其转换为 Base64,只需将其导入为 ASCII / Unicode。到目前为止没有任何效果。
编辑:我的 HexToBytes 函数(据我所知,它可以返回正确的 160-b 数组):
public static byte[] HexToBytes(string pValue)
{
// FIRST. Use StringBuilder.
StringBuilder builder = new StringBuilder();
// SECOND... USE STRINGBUILDER!... and LINQ.
foreach (char c in pValue.Where(IsHexDigit).Select(Char.ToUpper))
{
builder.Append(c);
}
// THIRD. If you have an odd number of characters, something is very wrong.
string hexString = builder.ToString();
if (hexString.Length % 2 == 1)
{
//throw new InvalidOperationException("There is an odd number of hexadecimal digits in this string.");
// I will just add a zero to the end, who cares (0 padding)
Log.WriteLine(LogLevel.Debug, "Hexstring had an odd number of hexadecimal digits.");
hexString += '0';
}
byte[] bytes = new byte[hexString.Length / 2];
// FOURTH. Use the for-loop like a pro :D
for (int i = 0, j = 0; i < bytes.Length; i++, j += 2)
{
string byteString = String.Concat(hexString[j], hexString[j + 1]);
bytes[i] = HexToByte(byteString);
}
return bytes;
}
I've been trying to encrypt a password with a public RSA key that is sent to me by the server.
var csp = new CspParameters(1, "Microsoft Strong Cryptographic Provider");
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(1280, csp);
byte[] key = ByteUtils.HexToBytes(client.RSAKey);
RSA.ImportCspBlob(key);
byte[] encrypted = RSA.Encrypt(Encoding.ASCII.GetBytes(password), true);
The hex key is provided in such format:
string key = "30819D300D06092A864886F70D010101050003818B0030818702818100C7BD672D8C634D443840AD809790852770D3A2E99F456D6516329E0205D0645C23FD001D4D070CEE368A20526FEB2402358C915D7E86102B1659AA8651C449C344599F72BE904B8E338E7002E9978453C5BBCCA51AC165AA265069E0EAB1411D11A2FFDD35E5A8296A6A2AF238945874E8206979B0A16E2E4260A161CAB5C905020111";
As the string is 320-bytes long in hex format, I assume the key is 160 bytes (RSA 1280)
Using this method, the provider keeps saying "Bad Version of provider.\r\n".
I've tried several methods, convert it to Base64, simply import it as ASCII / Unicode. Nothing worked so far.
EDIT: My HexToBytes function (which works afaik, it returns me correct 160-b array):
public static byte[] HexToBytes(string pValue)
{
// FIRST. Use StringBuilder.
StringBuilder builder = new StringBuilder();
// SECOND... USE STRINGBUILDER!... and LINQ.
foreach (char c in pValue.Where(IsHexDigit).Select(Char.ToUpper))
{
builder.Append(c);
}
// THIRD. If you have an odd number of characters, something is very wrong.
string hexString = builder.ToString();
if (hexString.Length % 2 == 1)
{
//throw new InvalidOperationException("There is an odd number of hexadecimal digits in this string.");
// I will just add a zero to the end, who cares (0 padding)
Log.WriteLine(LogLevel.Debug, "Hexstring had an odd number of hexadecimal digits.");
hexString += '0';
}
byte[] bytes = new byte[hexString.Length / 2];
// FOURTH. Use the for-loop like a pro :D
for (int i = 0, j = 0; i < bytes.Length; i++, j += 2)
{
string byteString = String.Concat(hexString[j], hexString[j + 1]);
bytes[i] = HexToByte(byteString);
}
return bytes;
}
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您的公钥格式不正确。它不是 CSP blob。它是 DER 编码的SubjectPublicKeyInfo 结构。您可以找到源代码来解析它,也可以编写自己的代码。 这里是此类代码的一个示例。
Your public key is not in the correct format. It is not a CSP blob. It is a DER encoded SubjectPublicKeyInfo structure. You can find source code to parse it or you can write your own. Here is one example of such code.