Android Question BCrypt usage help [Solved]

R

Revisable5987

Member
Licensed User
Hi
Currently using the BCrypt library by donmanfred but having a little trouble with 'checkpw', possibly due to me not quite understanding the correct syntax for this lib

This is what I am using in my code:
B4X: 
Private crypt As BCrypt
crypt.Initialize("")
If crypt.checkpw(string.Text, hash.Text)= True Then
'do something
    Else
    'do something else
End If
This works fine if the passwords match, however if the password is typed incorrectly my app crashes with log:
B4X: 
Error occurred on line: 131 (CreatePassword)
java.lang.IllegalArgumentException: Invalid salt version
    at org.mindrot.jbcrypt.BCrypt.hashpw(BCrypt.java:659)
    at org.mindrot.jbcrypt.BCrypt.checkpw(BCrypt.java:764)
    at de.donmanfred.BCryptwrapper.checkpw(BCryptwrapper.java:58)
    at b4a.example.createpassword._checkpassword(createpassword.java:752)
    at b4a.example.createpassword$ResumableSub_CheckCredentials.resume(createpassword.java:667)
    at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resumeAsUserSub(DebugResumableSub.java:48)
    at anywheresoftware.b4a.shell.Shell.runGoodChain(Shell.java:475)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:293)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:176)
    at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resume(DebugResumableSub.java:43)
    at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:250)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:137)
    at anywheresoftware.b4a.BA$2.run(BA.java:370)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
 
Sort by date Sort by votes

Peter Simpson

Expert
Licensed User
Longtime User
kgcarpenter said:
Hi
Currently using the BCrypt library by donmanfred but having a little trouble with 'checkpw', possibly due to me not quite understanding the correct syntax for this lib
Click to expand...

Here you go...
Logger connected to: Google Pixel 2 XL
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
$2a$10$JNEKreseX/6PjAgL3/9bCOYC/WHI2YD25Q30jC2rGBk6wldMBBhFW
$2a$14$7WDToH3/gAy9DqdLUxfn/ebJ2PuqD003XPA5y02uBV4tKREggG5oO
true
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
B4X: 
    Private BCrypt As BCrypt
    Private MyName As String = "Peter Simpson"

    Log(BCrypt.HashPW(MyName))
    Log(BCrypt.HashPW2(MyName, 14))
    Log(BCrypt.CheckPW(MyName, "$2a$14$BPHO.gjywGwTOgDt/DbZUelO.6YCjG.3nW10QvCRcBFv4eUHhqIBa"))


Enjoy...
 
Upvote 0
R

Revisable5987

Member
Licensed User
Thanks but problem solved!

It was my error. The database had some entries with unhashed test passwords.
The 'invalid salt version' error is thrown when using 'checkpw' on two text strings.
 
Upvote 0
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…