I must migrate my backend from php to node. We used php crypt (with default random salt) to hash the passwords.
For instance, for the password 'd1692fab28b8a56527ae329b3d121c52', I have the following crypted pw in my base (depending if I used either md5 or sha512, as the $i$ specify) :
$1$7JxJYjJK$oFtCGyVvflspPtxB7YrWP.
$6$CVx6KL5l$wzk3YXlqUaz42Kb9r2lmEJhx/FBUXPRoLWN.20/XMBbgQrhp3vSHkEDF3bJEtpM3M96VZ.AMKatLGSKYZZKNH/
And in php I can verify them with crypt :
echo crypt('d1692fab28b8a56527ae329b3d121c52', '$1$7JxJYjJK$oFtCGyVvflspPtxB7YrWP.');
echo "\n";
echo crypt('d1692fab28b8a56527ae329b3d121c52', '$6$CVx6KL5l$wzk3YXlqUaz42Kb9r2lmEJhx/FBUXPRoLWN.20/XMBbgQrhp3vSHkEDF3bJEtpM3M96VZ.AMKatLGSKYZZKNH/');
echo "\n";
Which returns the correct crypted pw.
I did not manage to obtain such results with any node function. I tried stuff like :
require("crypto").createHmac("md5", "7JxJYjJK").update("d1692fab28b8a56527ae329b3d121c52").digest("base64");
And many others, but without any success.
Can someone please help me to do this ? I abolutely need the MD5 version ($1$) ; the sha512 would be somewhat nice (I know it's horrifying, but it's the md5 version that was used on the prod server, and the sha512 that was used on the test server...).
I just converted the original crypt_md5() (as used in PHP) to JavaScript for one of my projects. You can find it here:
https://github.com/BlaM/cryptMD5-for-javascript
(Supports only $1$, but that's at least a part of what you are looking for.)
Related
I used the bcrypt to hash my password. The problem is that when the password was hashed from PHP (example: $2y$10$qLubKu5BTO7eFk8oXjk3xOZDxxQI/F0GgdgjKkL3kzF/8M565hJpq) VB.NET cannot recognize it. But if the password was hashed using VB.NET (example: $2a$10$XwkBsps2z3tlLU2qwumC6OjTPhg/zvudNS5g5hant9xFKxUeNupca) PHP recognizes it. Is this some kind of version error? There is an exception: 'Invalid Salt Revision'
Thanks!
Tried different packages from nuget still at no luck :(
Dim check As String = BCrypt.Net.BCrypt.HashPassword(txtbox_pword.Text)
If BCrypt.Net.BCrypt.Verify(txtbox_pword.Text, pword) = True Then
'in
End If
https://i.stack.imgur.com/fvXzU.png
Problem solve! Used some function to make the hash from PHP to start with $2a$ then viola! :D Thanks!
We're in the process of converting our site from an old PHP framework to Rails, and would really like for users to continue being able to login with their old password. On the old site, we're using password_hash and password_verify to hash and verify the passwords. However, on Rails I can't seem to get it to verify the old password.
Here is what we have in PHP:
Hash:
password_hash($user['salt'] . $password . $user['salt'], PASSWORD_DEFAULT);
Verify:
password_verify($user['salt'] . $password . $user['salt'], $user['password'])
On the new Rails framework we're using Devise and have built a custom migration script to move everything over and identify the correct password hashing method based on a password_version stored in the db, and this is what I'm using inside my User model:
def valid_password?(password)
if password_version == 'legacy'
hash = BCrypt::Password.new(encrypted_password)
hash_str = password_salt+password+password_salt
return hash.is_password? hash_str
end
super(password)
end
Any ideas would be greatly appreciated
The format of a PHP password_hash password looks roughly like this:
$2y$10$.vGA1O9wmRjrwAVXD98HNOgsNpDczlqm3Jq7KnEd1rVAGv3Fykk1a
The default Ruby Bcrypt method produces passwords of the form:
$2a$10$GtKs1Kbsig8ULHZzO1h2TetZfhO4Fmlxphp8bVKnUlZCBYYClPohG
For a clean solution here you can always differentiate between the two by the $2y or $2a prefix. There's no need for a format column when it's already baked into the format.
For example:
case (encrypted_password[0,3])
when '$2y'
# Legacy PHP password
BCrypt::Password.new(encrypted_password.sub(/\A\$2y/, '$2a')).is_password?(salt + password + salt)
when '$2a'
# Ruby BCrypt password
BCrypt::Password.new(encrypted_password).is_password?(password)
else
# Unexpected type?
end
What you'll want to do on a successful verification of password is re-write the password to the database using Ruby's method to gradually replace all the old PHP formatted ones.
I am developing a system for Online Hotel booking system which I did not start from scratch. The information of customers(bookers) in the system are encrypted using MD5 but unlike normal md5() php function the system is quite complicated as you can see here :
$psw = md5("vhdsxnjuobef");
$t_cred_num = md5_encrypt($t_cred_num, $psw, 16);
and for Decryption it goes like :
$psw = md5("vhdsxnjuobef");
$t_credit_num = md5_decrypt($t_cred_num, $psw, 16);
this code is not Working though on my Server and there is alot of Customer's information Encrypted.
Example of hash of t_cred_num variable =>
fdRucZHctr7vIX+U400xGHq53Qemze0YQH1sAUjvmaC1P+XaRadI9CaX0wrkDXu6
Any Ideas on how to Decrypt these hashes ? When I use md5_decrypt with the hashes nothing happens.
I think the md5_crypt and md5_encrypt are functions hand crafted by the previous developer. md5 isn't supposed to be decryptable. Hash's are supposed to be one way functions: http://en.wikipedia.org/wiki/Hash_function
So, you'll need to find the definition of those functions. A search for "function md5_" in the code files should find the place in the code where they are defined.
there's no way to decrypt an md5. there are two things you can do:
if you have other account or know the password of another account then copy the md5 characters of it and place it on yours.
search for an md5 of let's say "admin". Paste the md5 equivalent of the word "admin" on your account. You can also use other words.
After that, login to your account then change back your password
I was using Laravel to register the users. It uses bcrypt like so:
$2y$10$kb9T4WXdz5aKLSZX1OkpMOx.3ogUn9QX8GRZ93rd99i7VLKmeoXXX
I am currently making another script that will authenticate users from another source using python. I installed py-bcrypt and tried it. The format is as follows:
$2a$10$Vj0b0GZegbpXIIpa/lvi9OjkAFJ5zNzziVRW7yN9ssDKVQDX47XXX
But on python I cannot authenticate the user because of invalid salt.
I noticed that Laravel bcrypt uses $2y while python uses $2a. How do I get around this?
notes:
I used 10 rounds for both crypts.
I just found out that the 2a and 2y are very similar except for the name(prefix).
replacing 2y of the laravel hash, to 2a still keeps the integrity of the hash and should work properly and match the password even if you replace the identity.
In my case (question) the solution was to use str.replace('$2y$', '$2a$') and it all worked well.
Now the py-bcrypt accepts the hash without the error invalid salt.
Good Luck guys.
Now in 2018, we are able to use a hash string from php:
<?php echo password_hash( "302010", PASSWORD_BCRYPT ); ?>
$2y$10$20l2aC6kIyltpgWLmp80n.4itLhmoP58CU80m1
m/ukE8TZYJAASx.
and check it with python:
>>>import bcrypt
>>>bcrypt.checkpw(b'302010',b'$2y$10$20l2aC6kIyltpgWLmp80n.4itLhmoP58CU80m1
m/ukE8TZYJAASx.')
True
or a hash string from python with php
>>>import bcrypt
>>>hashed = bcrypt.hashpw(b'302010', bcrypt.gensalt())
$2b$12$tbv8bBsuQUwq0GTCW0E2GeVUiS65ESb60fRVwbaVLlR1m4iwbbOWO
<?php //validade hash in php
if(password_verify ( "302010", '$2b$12$tbv8bBsuQUwq0GTCW0E2GeVUiS65ESb60fRVwbaVLlR1m4iwbbOWO' )){
echo "valid";
} else {
echo "invalid";
} ?>
https://3v4l.org/ELWtU
I have a system running on PHP version 5.2.10 Unfortunately the original programmer misunderstood how crypt() was implemented.
$crypt = crypt(trim($cuPassword), CRYPT_BLOWFISH);
// The programmer thought this is how you configure a blowfish cipher
nb CRYPT_BLOWFISH has a value of zero on this machine.
This works in as much as it produces a random looking password hash eg 0$oZ534I2VvSw
Today, I migrated the software to PHP 5.4.9 and discovered that $crypt becomes *0 , ie an error due to the invalid salt.
My problem is that I have a table of login passwords that I can no longer validate. My question: Is there going to be a way I can recreate the original cipher that ran under version 5.2? What hash was implemented when you passed "0" as a salt?
Your description doesn't really add up. In PHP 5.4.9, I tested this:
var_dump(crypt('hello', 0));
Output:
0$ny0efnQXFkE
Now in PHP 5.5, you'll get *0 when calling crypt('hello', 0). But that's okay! Because this is still true in PHP 5.5: this crypt('hello', '0$ny0efnQXFkE') == '0$ny0efnQXFkE'.
All you need to do is change how you generate your hash for new passwords. Validating existing passwords will continue to work.
For good measure, after people successfully log in, check if their hash begins with 0$. If it does, rehash the password (since they entered it, you know what it is) with the updated, proper crypt call.
I tried all valid two digit combinations (CRYPT_STD_DES) and I found that "0q" is equivalent (nearly).
PHP 5.2.10
crypt(trim($cuPassword), CRYPT_BLOWFISH);
Result = 0$txv6CWBxJ9Y
PHP 5.4.9
crypt(trim($cuPassword), '0q');
Result = 0qtxv6CWBxJ9Y
All I need to do is adjust the second character and I can match passwords again.
No, there's no way you can recreate the original cipher. Otherwise even a boy scout would be able to break blowfish.
Your best chance is to generate a random password for your users and hash it once again, then force them to change the password as soon as they login.
"$" is not a valid salt value according to crypt(3) so you need to find a crypt implementation that's equally broken as the one PHP/libc used to have :)
If verifying old passwords is enough, use Matthews answer, else try e.g. openssl which currently still seems to accept "0$" as salt:
$ echo -n "secret" | openssl passwd -crypt -salt '0$' -stdin
0$z.PXBBy6uY.