bcrypt failure

[wulftone]

Nice little intro... but I ran into some problems:

After installing CB, cloning this repo, setting up the db, installing bcrypt (it seems to start in my erl REPL) and making a boss.config file, it still doesn't work.... Here's what I get from the CB log when I try to register a user:

{{badmatch,undefined},
 [{bcrypt,mechanism,0,[{file,"src/bcrypt.erl"},{line,15}]},
  {bcrypt,gen_salt,0,[{file,"src/bcrypt.erl"},{line,18}]},
  {colosimo_user_controller,register,3,
                            [{file,"/home/trevor/work/colosimo/src/controller/colosimo_user_controller.erl"},
                             {line,28}]},
  {boss_web_controller,execute_action,5,
                       [{file,"src/boss/boss_web_controller.erl"},{line,772}]},
  {boss_web_controller,process_dynamic_request,5,
                       [{file,"src/boss/boss_web_controller.erl"},{line,521}]},
  {boss_web_controller,process_request,5,
                       [{file,"src/boss/boss_web_controller.erl"},{line,510}]},
  {timer,tc,3,[{file,"timer.erl"},{line,194}]},
  {boss_web_controller,build_dynamic_response,4,
                       [{file,"src/boss/boss_web_controller.erl"},
                        {line,444}]}]}

Any clues? I'll gladly update the readme with precise instructions once we get this working. : )

[imperialwicket]

Thanks for opening this issue, I'll try to get an update in place soon. In the meantime, check the comments http://imperialwicket.com/colosimo-chicago-boss-postgresql-and-bcrypt for some discussion and a few links regarding this issue.

[wulftone]

Yeah I looked at all of that and the google groups discussion.. still trying to figure out what all of it means..

[imperialwicket]

From the colosimo directory, does this happen for you:

Terminal:

$ ./init-dev

After ChicagoBoss startup output:

<Enter>
(colosimo@machine)2> bcrypt:hashpw("somePass",bcrypt:gen_salt()).
"$2a$12$WI7Tgxoj/fOrt.00XKwWNumvS0jkc./eB.wcRuyaSN1WrSdrw39fS"
(colosimo@machine)3>

Or do you see an error here?

[wulftone]

Yeah, I do:

(colosimo@wulf)1> bcrypt:hashpw("somePass",bcrypt:gen_salt()).
** exception error: no match of right hand side value undefined
     in function  bcrypt:mechanism/0 (src/bcrypt.erl, line 15)
     in call from bcrypt:gen_salt/0 (src/bcrypt.erl, line 18)

However, if I run bcrypt:start(). I get some different things:

(colosimo@wulf)1> bcrypt:start().
ok
(colosimo@wulf)2> 
=PROGRESS REPORT==== 28-Nov-2012::19:53:20 ===
          supervisor: {local,bcrypt_sup}
             started: [{pid,<0.171.0>},
                       {name,bcrypt_nif_worker},
                       {mfargs,{bcrypt_nif_worker,start_link,[]}},
                       {restart_type,permanent},
                       {shutdown,4294967295},
                       {child_type,worker}]

=PROGRESS REPORT==== 28-Nov-2012::19:53:20 ===
         application: bcrypt
          started_at: colosimo@wulf

Then, running the hashpw again:

(colosimo@wulf)2> bcrypt:hashpw("somePass",bcrypt:gen_salt()).

=ERROR REPORT==== 28-Nov-2012::19:54:20 ===
** Generic server bcrypt_nif_worker terminating 
** Last message in was {hashpw,"somePass",
                               {ok,"$2a$12$YyQJMsn.Cl51g3j3rHGZh."}}
** When Server state == {state,12,<<>>}
** Reason for termination == 
** {function_clause,
       [{bcrypt_nif_worker,terminate,
            [{badarg,
                 [{bcrypt_nif,hashpw,
                      [<<>>,#Ref<0.0.0.5475>,<0.171.0>,"somePass",
                       {ok,"$2a$12$YyQJMsn.Cl51g3j3rHGZh."}],
                      []},
                  {bcrypt_nif_worker,handle_call,3,
                      [{file,"src/bcrypt_nif_worker.erl"},{line,42}]},
                  {gen_server,handle_msg,5,
                      [{file,"gen_server.erl"},{line,588}]},
                  {proc_lib,init_p_do_apply,3,
                      [{file,"proc_lib.erl"},{line,227}]}]},
             {state,12,<<>>}],
            [{file,"src/bcrypt_nif_worker.erl"},{line,34}]},
        {gen_server,terminate,6,[{file,"gen_server.erl"},{line,722}]},
        {proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,227}]}]}
** exception exit: {{function_clause,[{bcrypt_nif_worker,terminate,
                                                         [{badarg,[{bcrypt_nif,hashpw,
                                                                               [<<>>,#Ref<0.0.0.5475>,<0.171.0>,"somePass",
                                                                                {ok,"$2a$12$YyQJMsn.Cl51g3j3rHGZh."}],
                                                                               []},
                                                                   {bcrypt_nif_worker,handle_call,3,
                                                                                      [{file,"src/bcrypt_nif_worker.erl"},{line,42}]},
                                                                   {gen_server,handle_msg,5,
                                                                               [{file,"gen_server.erl"},{line,588}]},
                                                                   {proc_lib,init_p_do_apply,3,
                                                                             [{file,"proc_lib.erl"},{line,227}]}]},
                                                          {state,12,<<>>}],
                                                         [{file,"src/bcrypt_nif_worker.erl"},{line,34}]},
                                      {gen_server,terminate,6,
                                                  [{file,"gen_server.erl"},{line,722}]},
                                      {proc_lib,init_p_do_apply,3,
                                                [{file,"proc_lib.erl"},{line,227}]}]},
                    {gen_server,call,
                                [bcrypt_nif_worker,
                                 {hashpw,"somePass",{ok,"$2a$12$YyQJMsn.Cl51g3j3rHGZh."}},
                                 infinity]}}
     in function  gen_server:call/3 (gen_server.erl, line 188)

=CRASH REPORT==== 28-Nov-2012::19:54:20 ===
  crasher:
    initial call: bcrypt_nif_worker:init/1
    pid: <0.171.0>
    registered_name: bcrypt_nif_worker
    exception exit: {function_clause,
                        [{bcrypt_nif_worker,terminate,
                             [{badarg,
                                  [{bcrypt_nif,hashpw,
                                       [<<>>,#Ref<0.0.0.5475>,<0.171.0>,
                                        "somePass",
                                        {ok,"$2a$12$YyQJMsn.Cl51g3j3rHGZh."}],
                                       []},
                                   {bcrypt_nif_worker,handle_call,3,
                                       [{file,"src/bcrypt_nif_worker.erl"},
                                        {line,42}]},
                                   {gen_server,handle_msg,5,
                                       [{file,"gen_server.erl"},{line,588}]},
                                   {proc_lib,init_p_do_apply,3,
                                       [{file,"proc_lib.erl"},{line,227}]}]},
                              {state,12,<<>>}],
                             [{file,"src/bcrypt_nif_worker.erl"},{line,34}]},
                         {gen_server,terminate,6,
                             [{file,"gen_server.erl"},{line,722}]},
                         {proc_lib,init_p_do_apply,3,
                             [{file,"proc_lib.erl"},{line,227}]}]}
      in function  gen_server:terminate/6 (gen_server.erl, line 725)
    ancestors: [bcrypt_sup,<0.169.0>]
    messages: []
    links: [<0.170.0>]
    dictionary: []
    trap_exit: false
    status: running
    heap_size: 987
    stack_size: 24
    reductions: 257
  neighbours:

=SUPERVISOR REPORT==== 28-Nov-2012::19:54:20 ===
     Supervisor: {local,bcrypt_sup}
     Context:    child_terminated
     Reason:     {function_clause,
                     [{bcrypt_nif_worker,terminate,
                          [{badarg,
                               [{bcrypt_nif,hashpw,
                                    [<<>>,#Ref<0.0.0.5475>,<0.171.0>,
                                     "somePass",
                                     {ok,"$2a$12$YyQJMsn.Cl51g3j3rHGZh."}],
                                    []},
                                {bcrypt_nif_worker,handle_call,3,
                                    [{file,"src/bcrypt_nif_worker.erl"},
                                     {line,42}]},
                                {gen_server,handle_msg,5,
                                    [{file,"gen_server.erl"},{line,588}]},
                                {proc_lib,init_p_do_apply,3,
                                    [{file,"proc_lib.erl"},{line,227}]}]},
                           {state,12,<<>>}],
                          [{file,"src/bcrypt_nif_worker.erl"},{line,34}]},
                      {gen_server,terminate,6,
                          [{file,"gen_server.erl"},{line,722}]},
                      {proc_lib,init_p_do_apply,3,
                          [{file,"proc_lib.erl"},{line,227}]}]}
     Offender:   [{pid,<0.171.0>},
                  {name,bcrypt_nif_worker},
                  {mfargs,{bcrypt_nif_worker,start_link,[]}},
                  {restart_type,permanent},
                  {shutdown,4294967295},
                  {child_type,worker}]


=PROGRESS REPORT==== 28-Nov-2012::19:54:20 ===
          supervisor: {local,bcrypt_sup}
             started: [{pid,<0.175.0>},
                       {name,bcrypt_nif_worker},
                       {mfargs,{bcrypt_nif_worker,start_link,[]}},
                       {restart_type,permanent},
                       {shutdown,4294967295},
                       {child_type,worker}]
(colosimo@wulf)3> 

Talk about verbose!...

[imperialwicket]

So wherever bcrypt is installed, it's not starting for ChicagoBoss. Also, you'll need to start both crypto and bcrypt:

crypto:start().
bcrypt:start().

Then those errors should go away.

A more fundamental test is just executing 'erl' to bring up the prompt, and trying the same thing. That will tell you if it's a user/environment error, or just a module loading issue for Erlang generically.

I'm also interested in whether or not you installed erlang from a package, or built it from source; and what OS (and architecture) you are using. I know there are a couple of oddities in the Ubuntu Erlang packages, and I'm wondering if they load modules/libs differently than a local ./configure && make && make install would handle them. I'll echo my earlier guess that it's a problem with universal packages and libs stored for 32 or 64 bit specifically.

[wulftone]

Hmmm crypto:start(). responds with "already started." The rest is the same as before.

I installed erlang R15B02 with kerl onto Linux Mint 13:

$ uname -a
Linux wulf 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux)

I tried putting erlang-bcrypt into the ChicagoBoss/deps/ directory, but that didn't seem to accomplish anything in particular...

Also tried putting it in the colosimo.app.src file, thinking it might autostart (since crypto is in there)... nothing...

{application, colosimo, [
        {description, "My Awesome Web Framework"},
        {vsn, "0.0.1"},
        {modules, []},
        {registered, []},
        {applications, [kernel, stdlib, crypto, bcrypt, boss]},
        {env, []}
    ]}.

Clearly I need to do lots more reading about this before randomly trying things, hoping they'll work. : )

[imperialwicket]

Is crypto.beam in the same relative location as bcrypt.beam on your system?

[EDIT - 'bcrypt.beam' not 'erlang-bcrypt.beam']

[wulftone]

It wasn't, because I moved it into the ChicagoBoss/deps folder, so I moved it back to .kerl/installs/r15b02/lib/. That didn't help. However, the comment at the end of your blog post almost worked. : ) I had to change some things to get it to go. I'll fork this and you can see the changes I made in a few minutes here...

[wulftone]

This is my super-basic cobbling together of internet information solution: #2

It probably sucks. : )

[imperialwicket]

Thanks for figuring this out. I need to figure out how/where to merge this - as it's definitely an environment-specific update.

[wulftone]

Meaning you don't have to start bcrypt like this?

Does your bcrypt return something besides a tuple from bcrypt:hashpw()?

[imperialwicket]

No, I don't start bcrypt at all, it's installed with the rest of my core modules so that whenever I issue 'erl [args]', it loads.

I can call ./init.sh or ./init-dev.sh and the project cloned from master runs, registers, and logs in. But, this is on Debian 32bit, and with a locally built Erlang installation (I've also tested on Amazon Linux, 64bit - again with locally built Erlang).

There are a lot of good reasons for installing bcrypt as a dependency to your project, but in my mind, bcrypt is handy to have at the core level for Erlang. I'm pretty new to Erlang too, and I agree that much of this confusion has to do with loading modules in Erlang generally and the best way to transition this to a CB project.