使用 openssl_seal 加密的 php 数据。如何在c#中解码?
我正在 php 应用程序和 ac# 程序之间传递一些数据(1-2MB)。信息需要加密,我使用的是 Rijndael 加密,但加密速度非常慢。我正在尝试在 php 端切换到 openssl_seal 并使其工作正常:
PHP 代码
<!-- language: lang-php -->
str = 123;
$fp = fopen("/home/prod/publickey.pem", "r");
$cert = fread($fp, 8192);
fclose($fp);
$pk1 = openssl_get_publickey($cert);
openssl_seal($str, $sealed, $ekeys, array($pk1));
openssl_free_key($pk1);
$sealed = base64_encode($sealed);
$Xevk = base64_encode($ekeys[0]);
echo $Xevk."\n\n\n".$sealed;
但我在尝试在 c# 端解密时遇到问题。
C# 代码
<!-- language: c# -->
public static string DecryptSSL(string str) {
string[] strs = System.Text.RegularExpressions.Regex.Split(str, "\n\n\n");
X509Certificate2 myCert2 = null;
RSACryptoServiceProvider rsa = null;
try {
myCert2 = new X509Certificate2(Properties.Resources.mycertkey, "");
rsa = (RSACryptoServiceProvider)myCert2.PrivateKey;
} catch(Exception e) {
Console.WriteLine(e.Message);
}
byte[] xkey = rsa.Decrypt(Convert.FromBase64String(strs[0]), false);
byte[] content = Convert.FromBase64String(strs[1]);
EncDec.RC4(ref content, xkey);
return System.Convert.ToBase64String(content);
}
public static void RC4(ref Byte[] bytes, Byte[] key) {
Byte[] s = new Byte[256];
Byte[] k = new Byte[256];
Byte temp;
int i, j;
for(i = 0; i < 256; i++) {
s[i] = (Byte)i;
k[i] = key[i % key.GetLength(0)];
}
j = 0;
for(i = 0; i < 256; i++) {
j = (j + s[i] + k[i]) % 256;
temp = s[i];
s[i] = s[j];
s[j] = temp;
}
i = j = 0;
for(int x = 0; x < bytes.GetLength(0); x++) {
i = (i + 1) % 256;
j = (j + s[i]) % 256;
temp = s[i];
s[i] = s[j];
s[j] = temp;
int t = (s[i] + s[j]) % 256;
bytes[x] ^= s[t];
}
}
,其中使用包含 php 页面响应的 ascii 字符串调用 DecryptSSL。
我从来没有得到解密函数返回的原始字符串,在本例中为“123”。我还缺少什么?
I am passing some data (1-2MB) between a php app and a c# program. The info needs to be encrypted and I was using a Rijndael encryption, but encryption was very slow. I am trying to switch to openssl_seal on the php side and have that working fine:
PHP CODE
<!-- language: lang-php -->
str = 123;
$fp = fopen("/home/prod/publickey.pem", "r");
$cert = fread($fp, 8192);
fclose($fp);
$pk1 = openssl_get_publickey($cert);
openssl_seal($str, $sealed, $ekeys, array($pk1));
openssl_free_key($pk1);
$sealed = base64_encode($sealed);
$Xevk = base64_encode($ekeys[0]);
echo $Xevk."\n\n\n".$sealed;
But I am having issues trying to decrypt on the c# end.
C# Code
<!-- language: c# -->
public static string DecryptSSL(string str) {
string[] strs = System.Text.RegularExpressions.Regex.Split(str, "\n\n\n");
X509Certificate2 myCert2 = null;
RSACryptoServiceProvider rsa = null;
try {
myCert2 = new X509Certificate2(Properties.Resources.mycertkey, "");
rsa = (RSACryptoServiceProvider)myCert2.PrivateKey;
} catch(Exception e) {
Console.WriteLine(e.Message);
}
byte[] xkey = rsa.Decrypt(Convert.FromBase64String(strs[0]), false);
byte[] content = Convert.FromBase64String(strs[1]);
EncDec.RC4(ref content, xkey);
return System.Convert.ToBase64String(content);
}
public static void RC4(ref Byte[] bytes, Byte[] key) {
Byte[] s = new Byte[256];
Byte[] k = new Byte[256];
Byte temp;
int i, j;
for(i = 0; i < 256; i++) {
s[i] = (Byte)i;
k[i] = key[i % key.GetLength(0)];
}
j = 0;
for(i = 0; i < 256; i++) {
j = (j + s[i] + k[i]) % 256;
temp = s[i];
s[i] = s[j];
s[j] = temp;
}
i = j = 0;
for(int x = 0; x < bytes.GetLength(0); x++) {
i = (i + 1) % 256;
j = (j + s[i]) % 256;
temp = s[i];
s[i] = s[j];
s[j] = temp;
int t = (s[i] + s[j]) % 256;
bytes[x] ^= s[t];
}
}
Where DecryptSSL is being called with an ascii string containing the response from the php page.
I never get the original string, '123' in this case, returned from the decrypt function. What else am I missing?
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我自己在这里发现了这个问题。在 C# 代码中,我对 Base64 进行了额外的编码,以将其返回为字符串,而不仅仅是将字节转换为字符串。
替换
为使一切正常!
在 DecryptSSL 函数末尾
Found the issue here myself. In the c# code I was doing an extra encoding to base64 to get it back to a string rather than just converting the bytes to a string.
replacing
with
at the end of the DecryptSSL function got everything working!