Send device code in email

[Jnchi]

Resources:

• https://curl.haxx.se/libcurl/c/smtp-tls.html

• https://tools.ietf.org/html/rfc5322

• https://gist.github.com/Jnchi/83277f5559bbdc6af4554d3dec6ad64f#file-send_email-c

Depends on: https://github.com/CyberNinjas/pam_aad/pull/25

[Jnchi]

Converse

An email with a one-time passcode was sent to your email.

Email

Hi {{username}}@{{domain}},

Please use this one-time passcode (OTP) to sign in to your account: {{device_code}.

This OTP expires in {{expiration}} minutes.

Please do not REPLY to this email address, it does not support receiving messages.

[Jnchi]

"Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
  "rfcpedant.example.org>\r\n",

Source: https://curl.haxx.se/libcurl/c/smtp-mail.html

Resources:

• https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/tree/lib/uuid

• https://tools.ietf.org/html/rfc5322#section-3.6.5

• https://gist.github.com/Jnchi/83277f5559bbdc6af4554d3dec6ad64f

[Jnchi]

https://github.com/somnisoft/smtp-client

[Jnchi]

(gdb) print msg->data[3]
$8 = 0x600000000 <error: Cannot access memory at address 0x600000000>

[Jnchi]

Mar 18 09:11:23 debian sshd[27230]: Connection reset by 192.168.1.120 port 50252 [preauth]
Mar 18 09:11:44 debian sshd[27251]: error: PAM: User account has expired for jnchi from 192.168.1.120
Mar 18 09:11:44 debian sshd[27251]: Failed keyboard-interactive/pam for jnchi from 192.168.1.120 port 50340 ssh2

[Jnchi]

Notify user to check their email

/etc/pam.d/sshd

# Notify user to check their email.
password required pam_echo.so file=/usr/share/doc/aad.txt

/usr/share/doc/aad.txt

An email with a one-time passcode was sent to your email.

http://linux-pam.org/Linux-PAM-html/sag-pam_echo.html

[Jnchi]

PAM_TEXT_INFO (See: https://github.com/linux-pam/linux-pam/blob/master/modules/pam_nologin/pam_nologin.c#L93)

http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html#mwg-pam_conv