Xojo gmail code#
Xojo gmail password#
Xojo gmail windows#

This code can easily do that: Private Function ConvertToHex(mb As ) As Text The resulting hash is a MemoryBlock so to display it, youРІР‚в„ўll want to convert it to a hexadecimal value. HashData = 2(saltData, passwordData, 500, _ PasswordData = 8.ConvertTextToData(password) SaltData = 8.ConvertTextToData(salt)Р”Вim passwordData As Here is an example: Dim salt As Text = 'salted' PBKDF2 with a salt and SHA256 can work really well. Use one of the other available hashing functions such as SHA256.Р”В«ut even better, you can use the PBKDF2 function which is essentially a РІР‚СљslowРІР‚Сњ function which makes brute-force attacks more difficult toР’В achieve. You may think it does not matter much for your purposes, but donРІР‚в„ўt be the one that is easier to hack. This flaw has been used to fake security certificates among other things. The primary problem is that it is possible for two completely different values to generate the same hash. It has been known for some time that MD5 and SHA1 areР’В no longer secure hashing functions and areР’В not recommended for use. Using a hash with a salt works well, but you also have to use a secure hashing function. AР’В hacker would actually need to figure out how you are creating your salt value before they can generate a rainbow table. Such a value is not likely to show up in a rainbow table anywhere because itРІР‚в„ўs specific to you, thus limiting its general usefulness. You can use the same salt value for all the passwords or you can use something more specific for each password.Р”В¬reating an MD5 hash on the combination of the hash for РІР‚СљfrenchfriesРІР‚Сњ and the text РІР‚СљsaltedРІР‚Сњ generates this hash using MD5:

Xojo gmail password#

The salt is an extra value that you add to the password to generate hashes that make rainbow tables largely useless. One way to help mitigate this is to use a РІР‚СљsaltРІР‚Сњ along with the password to create the hash. If a hacker gets access to your hash value and they know how it was calculated, they can then look it up in the rainbow table to see what the plain text password is. Since most people choose relatively simple passwords, they will more than likely be found in a rainbow table. This is where a nefarious hacker pre-calculates hash values for large amounts of common words. This strategy is a great start, but it has a flaw: it is susceptible to a РІР‚Сљbrute-forceРІР‚Сњ attack. If they are the same then you know the password is correct even though you do not knowР’В the actual password. To validate that the password is correct, when the user logs in you calculate the hash of the password they entered and then check to see if it matches the hash ofР’В the password you have stored. The idea is that instead of storingР’В the actual password, you use the hash of the password. It just so happens that XojoР’В has several built-in one-way hash functions in the Crypto namespace: MD5, SHA1, SHA256, SHA512 and PBKDF2.Р”Р‡or example, given a password РІР‚СљfrenchfriesРІР‚Сњ, MD5 generates this hash value (converted to hex): A one-way hash is a hash that can convert text to a hash value but cannot convert the hash value back to the original text. A hash is a function that given a value, returns a new value of a fixed length that is always the same for the original value.

Instead store a one-way hash of a password. So the first thing to do is to not store the password. The only one who should know theР’В password is the person who created the password. Unfortunately, IРІР‚в„ўve seen far too many apps that have databases with a РІР‚СљpasswordРІР‚Сњ column that contains the actual password! And IРІР‚в„ўm sure youРІР‚в„ўve seen web sites that, when you click the РІР‚Сљforgot passwordРІР‚Сњ link, send you an email with your actual password! This is not good. The best way to not allow passwords to be compromised is to not store the password at all. Though too much security is never enough, as developers, there are things we can do to keep our usersРІР‚в„ў passwords secure.

Xojo gmail windows#

The SAFEARRAY structure is described in detail in the Windows Dev Center ( bit.Passwords are a problem, as we frequently see in the newsР’В when databases containing password and login information are hacked and exposed. This is a companion article to Simplify Safe Array Programming in C++ with CComSafeArray Introducing the SAFEARRAY Data StructureР”Р„ safe array is represented using a C data structure named SAFEARRAY, which is defined in the Windows Platform SDK header. Volume 32 Number 3 Introducing the SAFEARRAY Data Structure