public static bool IsSemiWeakKey(byte[] rgbKey)
{
if (!IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
byte[] rgbOddParityKey = Utils.FixupKeyParity(rgbKey);
UInt64 key = QuadWordFromBigEndian(rgbOddParityKey);
if ((key == 0x01fe01fe01fe01fe) ||
(key == 0xfe01fe01fe01fe01) ||
(key == 0x1fe01fe00ef10ef1) ||
(key == 0xe01fe01ff10ef10e) ||
(key == 0x01e001e001f101f1) ||
(key == 0xe001e001f101f101) ||
(key == 0x1ffe1ffe0efe0efe) ||
(key == 0xfe1ffe1ffe0efe0e) ||
(key == 0x011f011f010e010e) ||
(key == 0x1f011f010e010e01) ||
(key == 0xe0fee0fef1fef1fe) ||
(key == 0xfee0fee0fef1fef1))
{
return(true);
}
return(false);
}
/// <summary>确定指定的密钥是否为半弱密钥。</summary>
/// <returns>如果该密钥为半弱密钥，则为 true；否则，为 false。</returns>
/// <param name="rgbKey">要进行半弱漏洞测试的机密密钥。</param>
/// <exception cref="T:System.Security.Cryptography.CryptographicException">
/// <paramref name="rgbKey" /> 参数的大小无效。</exception>
public static bool IsSemiWeakKey(byte[] rgbKey)
{
if (!DES.IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
switch (DES.QuadWordFromBigEndian(Utils.FixupKeyParity(rgbKey)))
{
case 143554428589179390:
case 18303189645120372225:
case 2296870857142767345:
case 16149873216566784270:
case 135110050437988849:
case 16141428838415593729:
case 2305315235293957886:
case 18311634023271562766:
case 80784550989267214:
case 2234100979542855169:
case 16212643094166696446:
case 18365959522720284401:
return(true);
default:
return(false);
}
}
/// <summary>Determines whether the specified key is weak.</summary>
/// <param name="rgbKey">The secret key to test for weakness. </param>
/// <returns>
/// <see langword="true" /> if the key is weak; otherwise, <see langword="false" />.</returns>
/// <exception cref="T:System.Security.Cryptography.CryptographicException">The size of the <paramref name="rgbKey" /> parameter is not valid. </exception>
// Token: 0x060023CB RID: 9163 RVA: 0x000824C8 File Offset: 0x000806C8
public static bool IsWeakKey(byte[] rgbKey)
{
if (!TripleDES.IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
byte[] array = Utils.FixupKeyParity(rgbKey);
return(TripleDES.EqualBytes(array, 0, 8, 8) || (array.Length == 24 && TripleDES.EqualBytes(array, 8, 16, 8)));
}
public static bool IsWeakKey(byte[] rgbKey)
{
if (!IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
byte[] buffer = Utils.FixupKeyParity(rgbKey);
return(EqualBytes(buffer, 0, 8, 8) || ((buffer.Length == 0x18) && EqualBytes(buffer, 8, 0x10, 8)));
}
/// <summary>Determines whether the specified key is weak.</summary>
/// <param name="rgbKey">The secret key to test for weakness. </param>
/// <returns>
/// <see langword="true" /> if the key is weak; otherwise, <see langword="false" />.</returns>
/// <exception cref="T:System.Security.Cryptography.CryptographicException">The size of the <paramref name="rgbKey" /> parameter is not valid. </exception>
// Token: 0x06002159 RID: 8537 RVA: 0x00075F30 File Offset: 0x00074130
public static bool IsWeakKey(byte[] rgbKey)
{
if (!DES.IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
byte[] block = Utils.FixupKeyParity(rgbKey);
ulong num = DES.QuadWordFromBigEndian(block);
return(num == 72340172838076673UL || num == 18374403900871474942UL || num == 2242545357694045710UL || num == 16204198716015505905UL);
}
/// <summary>Determines whether the specified key is semi-weak.</summary>
/// <param name="rgbKey">The secret key to test for semi-weakness. </param>
/// <returns>
/// <see langword="true" /> if the key is semi-weak; otherwise, <see langword="false" />.</returns>
/// <exception cref="T:System.Security.Cryptography.CryptographicException">The size of the <paramref name="rgbKey" /> parameter is not valid. </exception>
// Token: 0x0600215A RID: 8538 RVA: 0x00075F98 File Offset: 0x00074198
public static bool IsSemiWeakKey(byte[] rgbKey)
{
if (!DES.IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
byte[] block = Utils.FixupKeyParity(rgbKey);
ulong num = DES.QuadWordFromBigEndian(block);
return(num == 143554428589179390UL || num == 18303189645120372225UL || num == 2296870857142767345UL || num == 16149873216566784270UL || num == 135110050437988849UL || num == 16141428838415593729UL || num == 2305315235293957886UL || num == 18311634023271562766UL || num == 80784550989267214UL || num == 2234100979542855169UL || num == 16212643094166696446UL || num == 18365959522720284401UL);
}
public static bool IsWeakKey(byte[] rgbKey)
{
if (!IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
ulong num = QuadWordFromBigEndian(Utils.FixupKeyParity(rgbKey));
if (((num != 0x101010101010101L) && (num != 18374403900871474942L)) && ((num != 0x1f1f1f1f0e0e0e0eL) && (num != 16204198716015505905L)))
{
return(false);
}
return(true);
}
public static bool IsSemiWeakKey(byte[] rgbKey)
{
if (!IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
ulong num = QuadWordFromBigEndian(Utils.FixupKeyParity(rgbKey));
if (((((num != 0x1fe01fe01fe01feL) && (num != 18303189645120372225L)) && ((num != 0x1fe01fe00ef10ef1L) && (num != 16149873216566784270L))) && (((num != 0x1e001e001f101f1L) && (num != 16141428838415593729L)) && ((num != 0x1ffe1ffe0efe0efeL) && (num != 18311634023271562766L)))) && (((num != 0x11f011f010e010eL) && (num != 0x1f011f010e010e01L)) && ((num != 16212643094166696446L) && (num != 18365959522720284401L))))
{
return(false);
}
return(true);
}
/// <summary>确定指定的密钥是否为弱密钥。</summary>
/// <returns>如果该密钥为弱密钥，则为 true；否则，为 false。</returns>
/// <param name="rgbKey">要进行漏洞测试的机密密钥。</param>
/// <exception cref="T:System.Security.Cryptography.CryptographicException">
/// <paramref name="rgbKey" /> 参数的大小无效。</exception>
public static bool IsWeakKey(byte[] rgbKey)
{
if (!DES.IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
switch (DES.QuadWordFromBigEndian(Utils.FixupKeyParity(rgbKey)))
{
case 72340172838076673:
case 18374403900871474942:
case 2242545357694045710:
case 16204198716015505905:
return(true);
default:
return(false);
}
}
public static bool IsWeakKey(byte[] rgbKey)
{
// All we have to check for here is (a) we're in 3-key mode (192 bits), and
// (b) either K1 == K2 or K2 == K3
if (!IsLegalKeySize(rgbKey))
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
}
byte[] rgbOddParityKey = Utils.FixupKeyParity(rgbKey);
if (EqualBytes(rgbOddParityKey, 0, 8, 8))
{
return(true);
}
if ((rgbOddParityKey.Length == 24) && EqualBytes(rgbOddParityKey, 8, 16, 8))
{
return(true);
}
return(false);
}
