private static IsLegalKeySize ( byte rgbKey ) : bool | ||
rgbKey | byte | |
리턴 | bool |
/// <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: 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); }
/// <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); } }