AUTH PLAIN base64 null character

[tarekselmane]

I am writing a c++ program that should send some mails using SMTP. I need to send the server the AUTH PLAIN request, so I need to code my "\0user@domain.com\0password" to base64, so that I can send the full request. When I pass the "\0user@domain.com\0password" to any program that decodes to base64 I got nothing, because I am starting my string with null character.

Code for base64: http://www.adp-gmbh.ch/cpp/common/base64.html
I am using Visual Studio 2010 on Windows 8.

Could you help please.

[VictorN]

When I pass the "\0user@domain.com\0password" to any program that decodes to base64 I got nothing, because I am starting my string with null character.

And why do you start your string with null character?

[tarekselmane]

Good morning VictorN

I am using SMTP protocol to send mails, and to send the server my authentication request I need to put in a buffer the following string
"AUTH PLAIN AGFkbWluQGV4YW1wbGUuY29tAHBhc3N3b3Jk"
AGFkbWluQGV4YW1wbGUuY29tAHBhc3N3b3Jk is the base64 coding for "\0admin@example.com\0password" without quotes.

https://rtcamp.com/tutorials/mail/server/testing/smtp/

http://www.fehcom.de/qmail/smtpauth.html

I tried to use AUTH LOGIN, then send my username, ans password separately, but I could no get authenticated, that's why I refered to AUTH PLAIN, which needs one buffer to be sent, not 3

Thank you in advance

[OReubens]

This is obviously wrong.
SMTP is built entirely around 'readable characters' (typically even 7bit) with a couple allowed control characters like \n, \r, \t.
\0 is not a valid character anywhere in the SMTP protocol.

[tarekselmane]

Good afternoon OReubens
I know that, but I don't want to use it in SMTP request, I need it in encoding base64 to get the ascii code to pass it to the buffer request

wsprintf(buff_Sent, "AUTH PLAIN AGFkbWluQGV4YW1wbGUuY29tAHBhc3N3b3Jk\r\n");
send(m_SocketSMTP , buff_Sent , (int)strlen(buff_Sent) , 0);

https://rtcamp.com/tutorials/mail/server/testing/smtp/