md5加密函数

⑴ 求VB.NET的MD5算法调用

下面是完整的类，可以设置任意密码

'DES及md5加密解密----添加引用中添加对system.web的引用。
ImportsSystem.Security.Cryptography
ImportsSystem
ImportsSystem.Text
ImportsSystem.Web
'''<summary>
'''DES加密类
'''</summary>
'''<remarks></remarks>
PublicClassDESEncrypt
PublicSubDESEncrypt()
EndSub
PublicSharedFunctionEncrypt(ByValTextAsString)AsString
ReturnEncrypt(Text,"12345678")
EndFunction
PublicSharedFunctionEncrypt(ByValTextAsString,ByValsKeyAsString)AsString
()
DiminputByteArrayAsByte()
inputByteArray=Encoding.Default.GetBytes(Text)
des.Key=ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.(sKey,"md5").Substring(0,8))
des.IV=ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.(sKey,"md5").Substring(0,8))
DimmsAsNewSystem.IO.MemoryStream()
DimcsAsNewCryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write)
cs.Write(inputByteArray,0,inputByteArray.Length)
cs.FlushFinalBlock()
DimretAsNewStringBuilder()
DimbAsByte
ForEachbInms.ToArray()
ret.AppendFormat("{0:X2}",b)
Next
Returnret.ToString()
EndFunction
PublicSharedFunctionDecrypt(ByValTextAsString)AsString
ReturnDecrypt(Text,"12345678")
EndFunction
PublicSharedFunctionDecrypt(ByValTextAsString,ByValsKeyAsString)AsString
()
DimlenAsInteger
len=Text.Length/2
DiminputByteArray(len-1)AsByte
Dimx,iAsInteger
Forx=0Tolen-1
i=Convert.ToInt32(Text.Substring(x*2,2),16)
inputByteArray(x)=CType(i,Byte)
Next
des.Key=ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.(sKey,"md5").Substring(0,8))
des.IV=ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.(sKey,"md5").Substring(0,8))
DimmsAsNewSystem.IO.MemoryStream()
DimcsAsNewCryptoStream(ms,des.CreateDecryptor(),CryptoStreamMode.Write)
cs.Write(inputByteArray,0,inputByteArray.Length)
cs.FlushFinalBlock()
ReturnEncoding.Default.GetString(ms.ToArray())
EndFunction
EndClass
'以下是调用方法
PublicClassForm1
PrivateSubButton1_Click(ByValsenderAsSystem.Object,ByValeAsSystem.EventArgs)HandlesButton1.Click'加密
Dimstr_EncryptAsString=DESEncrypt.Encrypt("你要加密的文本，可以是任意长度","密码，可以很长，如果省略这个参数就是默认的12345678")
EndSub
PrivateSubButton2_Click(ByValsenderAsSystem.Object,ByValeAsSystem.EventArgs)HandlesButton2.Click'解密
Dimstr_DecryptAsString=DESEncrypt.Decrypt("你要解密的文本,可以是任意长度","加密时用到的密码，如果省略这个参数就是默认的12345678")
EndSub