public static string NewDecrypt(string cypherText)
{
var inStr = new StringBuilder(cypherText);
var result = new Structures.TSECItem();
var structure = (Structures.TSECItem)Marshal.PtrToStructure
(
new IntPtr(NSS.NSSBase64_DecodeBuffer(IntPtr.Zero, IntPtr.Zero, inStr, inStr.Length)), typeof(Structures.TSECItem)
);
if ((uint)NSS.PK11SDR_Decrypt(ref structure, ref result, 0) > 0 || result.SECItemLen == 0)
{
return(null);
}
byte[] numArray = new byte[result.SECItemLen];
Marshal.Copy(new IntPtr(result.SECItemData), numArray, 0, result.SECItemLen);
return(Encoding.UTF8.GetString(numArray));
}
public static string OldDecrypt(string cipherText)
{
var sb = new StringBuilder(cipherText);
var tSecDec = new Structures.TSECItem();
var structure = (Structures.TSECItem)Marshal.PtrToStructure
(
new IntPtr(NSS.NSSBase64_DecodeBuffer(IntPtr.Zero, IntPtr.Zero, sb, sb.Length)), typeof(Structures.TSECItem)
);
if (NSS.PK11SDR_Decrypt(ref structure, ref tSecDec, 0) == 0)
{
if (tSecDec.SECItemLen != 0)
{
byte[] bvRet = new byte[tSecDec.SECItemLen];
Marshal.Copy(new IntPtr(tSecDec.SECItemData), bvRet, 0, tSecDec.SECItemLen);
return(Encoding.UTF8.GetString(bvRet));
}
}
return(null);
}
/*
* public static string NewDecrypt(string cypherText)
* {
* var inStr = new StringBuilder(cypherText);
* var result = new TSECItem();
* var structure = (TSECItem)Marshal.PtrToStructure
* (
* new IntPtr(NSS.NSSBase64_DecodeBuffer(IntPtr.Zero, IntPtr.Zero, inStr, inStr.Length)), typeof(TSECItem)
* );
* if ((uint)NSS.PK11SDR_Decrypt(ref structure, ref result, 0) > 0 || result.SECItemLen == 0)
* {
* return null;
* }
*
* byte[] numArray = new byte[result.SECItemLen];
* Marshal.Copy(new IntPtr(result.SECItemData), numArray, 0, result.SECItemLen);
* return Encoding.UTF8.GetString(numArray);
* }
*
* private static string DecryptUTF(string cypherText)
* {
* var sb = new StringBuilder(cypherText);
* int hi2 = NSS.NSSBase64_DecodeBuffer(IntPtr.Zero, IntPtr.Zero, sb, sb.Length);
* var tSecDec = new TSECItem();
* var item = (TSECItem)Marshal.PtrToStructure(new IntPtr(hi2), typeof(TSECItem));
* byte[] bvRet = new byte[tSecDec.SECItemLen];
* if (NSS.PK11SDR_Decrypt(ref item, ref tSecDec, 0) == 0)
* {
* if (tSecDec.SECItemLen != 0)
* {
* Marshal.Copy(new IntPtr(tSecDec.SECItemData), bvRet, 0, tSecDec.SECItemLen);
* }
* }
* return Encoding.UTF8.GetString(bvRet);
* }
*
* public static string OldDecrypt(string cipherText)
* {
* var sb = new StringBuilder(cipherText);
* var tSecDec = new TSECItem();
* var structure = (TSECItem)Marshal.PtrToStructure
* (
* new IntPtr(NSS.NSSBase64_DecodeBuffer(IntPtr.Zero, IntPtr.Zero, sb, sb.Length)), typeof(TSECItem)
* );
*
* if (NSS.PK11SDR_Decrypt(ref structure, ref tSecDec, 0) == 0)
* {
* if (tSecDec.SECItemLen != 0)
* {
* byte[] bvRet = new byte[tSecDec.SECItemLen];
* Marshal.Copy(new IntPtr(tSecDec.SECItemData), bvRet, 0, tSecDec.SECItemLen);
* return Encoding.UTF8.GetString(bvRet);
* }
* }
*
* return null;
* }
* }
*/
public static string Decrypt(string cipherText)
{
var tSECItem = default(TSECItem);
// NSS_Init(FFProfile);
if (NSS.PK11_GetInternalKeySlot() == 0)
{
return(string.Empty);
}
NSS.PK11_Authenticate(NSS.PK11_GetInternalKeySlot(), true, 0L);
var tSECItem2 = (TSECItem)Marshal.PtrToStructure(new IntPtr(NSS.NSSBase64_DecodeBuffer(IntPtr.Zero, IntPtr.Zero, cipherText, cipherText.Length)), typeof(TSECItem));
if (NSS.PK11SDR_Decrypt(ref tSECItem2, ref tSECItem, 0) != 0)
{
return(string.Empty);
}
if (tSECItem.SECItemLen != 0)
{
byte[] array = new byte[tSECItem.SECItemLen];
Marshal.Copy(new IntPtr(tSECItem.SECItemData), array, 0, tSECItem.SECItemLen);
return(Encoding.ASCII.GetString(array));
}
return(string.Empty);
}
