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#MD5 ENCODING IN SQL HOW TO#
#MD5 ENCODING IN SQL CODE#
#MD5 ENCODING IN SQL PASSWORD#

General News Suggestion Question Bug Answer Joke Praise Rant Admin Also too you should look into adding some SALT to your stored hashes, else they can be vulnerable to simple dictionary attack of precomputed keys of say the 40,000,000 most common passwords, finally take a look at the base64 encoding / decoding classes to store your hashes as shorter length strings. I think I remember seeing an article where some researchers use the Amazon Cloud to "crack" some SHA-1 hashes very quickly. If you or your readers are using the hash function to store passwords then you might want to look into some of the following suggestions.

#MD5 ENCODING IN SQL HOW TO#

The following example shows how to do it: For using assemblies in T-SQL, we must create assembly object in SQL Server database. Now we should create a stored procedure on the SQL Server side.result - SqlString pass-by-reference data type parameter which stored procedure returning through an OUTPUT argument.value – SqlString data type parameter which hash-code we need to return.Method “ HashString” takes two arguments: By this attribute, we define that our method will be used like a stored procedure. This class has only one method “ HashString” marked with attribute. All parameters must be declared according to SQL Server data types (see MSDN article (v=SQL.90).aspx).

Number of parameters must be the same as in stored procedures.

Your methods must be declared as void or return integer value (in my example, I declare method as void).

Your methods must be implemented as public static methods on a class in your assembly.

If you want to use your assembly methods over SQL Server stored procedures, you should follow the next rules: SBuilder.Append(bytHash.ToString( " x2")) Loop through each byte of the hashed data // and format each one as a hexadecimal string. StringBuilder sBuilder = new StringBuilder() HashAlgorithm mhash = mhash = new MD5CryptoServiceProvider() īyte bytValue = 8.GetBytes(str) īyte bytHash = mhash.ComputeHash(bytValue) Here is my stored procedure, when i execute it, i get these errors.ġ.Public static void HashString(SqlString value, out SqlString result) Using a SqlCommand object with a collection of SqlParameters instead of hardcoding raw SQL into your class. Look into parsing each of the parameters entered, and HOWEVER: I cannot stress enough that you MUST sanitise the input - if you are concerned with security then there is no way you should be leaving yourself so open to SQL Injection attacks. SqlCommand com = new SqlCommand(sql, con) Ģ5. SqlConnection con = new SqlConnection(strConnection) Ģ3. encoder.GetString(hashedBytes) + "','" +Ģ1. hashedBytes = md5.ComputeHash(encoder.GetBytes(TextBo圆.Text)) Ġ6. UTF8Encoding encoder = new UTF8Encoding() Ġ4. MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider() Ġ1.MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider() Ġ3.

#MD5 ENCODING IN SQL CODE#

What you need to do to your code to have the base64 version of the hashed string, change the initial code as follows (the change is marked in bold): Results below show the same hashing console giving base 64 strings too: If you convert it to a base 64 string instead of just the MD5 hash, it looks a lot tidier. I have created a little console with the hashing code in it to give some examples.

#MD5 ENCODING IN SQL PASSWORD#

Your password text looks ok - however its reminded me of something. ) VALUES is only the first step to take to prevent SQL injection. The stored procedure should look something like this: USE ĬREATE PROCEDURE VARCHAR(50), - put the right data types in here that match your VARCHAR(50) You will need a stored procedure on the database to be able to do this. Replace where it says "Column1Name" etc with the actual column names from your database. encoding 8 string hashedPassword encoding. Using (SqlCommand command = new SqlCommand("spInsertRegistration", con))Ĭommand.CommandType = Textbox9.Text) You are calling the ToString() method of the byte array - what you need to do instead is use the encoding classes to extract the string from the array. Using (SqlConnection con = new SqlConnection(connectionString)) HashedBytes = md5.ComputeHash(encoder.GetBytes(TextBo圆.Text)) UTF8Encoding encoder = new UTF8Encoding() The code in your class should read: MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider()