MD5實際一種單向的算法,是散列,很多人認(rèn)為是加密,實際有誤
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比如說winxp、win7各版本都有MD5值,那么是否可依據(jù)這個值還原出個正版的winxp或win7呢?
況且MD5“加密”的密鑰長度又是多少呢?比如des的不同版本有64位、128位、192位等
用Replace Pioneer可以實現(xiàn)md5批量加密,假如某文件每行是一個明文,詳細(xì)步驟:
1. ctrl-o打開文件
2. ctrl-h打開replace窗口
* replace unit選擇Line
* replace with pattern輸入md5_hex($match)\n
3. 點擊Replace,每行生成一個md5密文
4. ctrl-s保存到文件里。
測試結(jié)果,明文:
AAAAA
BBBBB
CCCCC
md5加密文本:
f6a6263167c92de8644ac998b3c4e4d1
87c7d4068be07d390a1fffd21bf1e944
e86a1cf0678099986a901c79086f5617
用Replace Pioneer進(jìn)行加密的例子還有:How to calculate md5 hex value of each line of text file?
Public Function md5(ByVal a As String) As String
Dim tempmd5 As System.Security.Cryptography.MD5 = New System.Security.Cryptography.MD5CryptoServiceProvider()
Dim bytResult() As Byte = tempmd5.ComputeHash(System.Text.Encoding.Default.GetBytes(a))
Dim strResult As String = BitConverter.ToString(bytResult)
strResult = strResult.Replace("-", "")
Return strResult
End Function
如果要計算文件的就把參數(shù)改成字節(jié)數(shù)組就可以了,然后獲取文件GetBytes()傳進(jìn)去就可以了。
下面是完整的類,可以設(shè)置任意密碼
'DES及md5加密解密----添加引用中添加對system.web的引用。
Imports?System.Security.Cryptography
Imports?System
Imports?System.Text
Imports?System.Web
'''?summary
'''?DES加密類
'''?/summary
'''?remarks/remarks
Public?Class?DESEncrypt
Public?Sub?DESEncrypt()
End?Sub
Public?Shared?Function?Encrypt(ByVal?Text?As?String)?As?String
Return?Encrypt(Text,?"12345678")
End?Function
Public?Shared?Function?Encrypt(ByVal?Text?As?String,?ByVal?sKey?As?String)?As?String
Dim?des?As?New?DESCryptoServiceProvider()
Dim?inputByteArray?As?Byte()
inputByteArray?=?Encoding.Default.GetBytes(Text)
des.Key?=?ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey,?"md5").Substring(0,?8))
des.IV?=?ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey,?"md5").Substring(0,?8))
Dim?ms?As?New?System.IO.MemoryStream()
Dim?cs?As?New?CryptoStream(ms,?des.CreateEncryptor(),?CryptoStreamMode.Write)
cs.Write(inputByteArray,?0,?inputByteArray.Length)
cs.FlushFinalBlock()
Dim?ret?As?New?StringBuilder()
Dim?b?As?Byte
For?Each?b?In?ms.ToArray()
ret.AppendFormat("{0:X2}",?b)
Next
Return?ret.ToString()
End?Function
Public?Shared?Function?Decrypt(ByVal?Text?As?String)?As?String
Return?Decrypt(Text,?"12345678")
End?Function
Public?Shared?Function?Decrypt(ByVal?Text?As?String,?ByVal?sKey?As?String)?As?String
Dim?des?As?New?DESCryptoServiceProvider()
Dim?len?As?Integer
len?=?Text.Length?/?2
Dim?inputByteArray(len?-?1)?As?Byte
Dim?x,?i?As?Integer
For?x?=?0?To?len?-?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.HashPasswordForStoringInConfigFile(sKey,?"md5").Substring(0,?8))
des.IV?=?ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey,?"md5").Substring(0,?8))
Dim?ms?As?New?System.IO.MemoryStream()
Dim?cs?As?New?CryptoStream(ms,?des.CreateDecryptor(),?CryptoStreamMode.Write)
cs.Write(inputByteArray,?0,?inputByteArray.Length)
cs.FlushFinalBlock()
Return?Encoding.Default.GetString(ms.ToArray())
End?Function
End?Class
'以下是調(diào)用方法
Public?Class?Form1
Private?Sub?Button1_Click(ByVal?sender?As?System.Object,?ByVal?e?As?System.EventArgs)?Handles?Button1.Click?'加密
Dim?str_Encrypt?As?String?=?DESEncrypt.Encrypt("你要加密的文本,可以是任意長度",?"密碼,可以很長,如果省略這個參數(shù)就是默認(rèn)的12345678")
End?Sub
Private?Sub?Button2_Click(ByVal?sender?As?System.Object,?ByVal?e?As?System.EventArgs)?Handles?Button2.Click?'解密
Dim?str_Decrypt?As?String?=?DESEncrypt.Decrypt("你要解密的文本,?可以是任意長度",?"加密時用到的密碼,如果省略這個參數(shù)就是默認(rèn)的12345678")
End?Sub
VB可使用DriveListBox 控件,DirListBox 控件和FileListBox 控件組合使用獲取文件夾里的文件數(shù)量(包括文件夾)。 DriveListBox 控件 在運行時,由于有 DriveListBox 控件,所以可選擇一個有效的磁盤驅(qū)動器。
這個是我之前寫的。在需要時調(diào)用即可。
Public Shared Function Encrypt(ByVal Text As String, ByVal sKey As String) As String
Dim provider As New DESCryptoServiceProvider()
Dim bytes As Byte() = Encoding.[Default].GetBytes(Text)
provider.Key = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8))
provider.IV = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8))
Dim stream As New MemoryStream()
Dim stream2 As New CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write)
stream2.Write(bytes, 0, bytes.Length)
stream2.FlushFinalBlock()
Dim builder As New StringBuilder()
For Each num As Byte In stream.ToArray()
builder.AppendFormat("{0:X2}", num)
Next
Return builder.ToString()
End Function
希望能幫到你
當(dāng)前文章:md5加密vb.net md5加密后是多少位
當(dāng)前鏈接:http://m.kartarina.com/article20/hgjdco.html
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