auth.c File Reference

IMAP authenticator multiplexor. More...

#include "config.h"
#include <string.h>
#include "private.h"
#include "mutt/lib.h"
#include "config/lib.h"
#include "core/lib.h"
#include "auth.h"

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Data Structures
struct	ImapAuth
	IMAP authentication multiplexor. More...

Functions
bool	imap_auth_is_valid (const char *authenticator)
	Check if string is a valid imap authentication method.
int	imap_authenticate (struct ImapAccountData *adata)
	Authenticate to an IMAP server.

Variables
static const struct ImapAuth	ImapAuthenticators []
	Accepted authentication methods.

Detailed Description

IMAP authenticator multiplexor.

Authors

• Michael R. Elkins
• Brandon Long
• Brendan Cully
• Richard Russon
• Pietro Cerutti
• Yousef Akbar
• Alejandro Colomar

Copyright

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file auth.c.

Function Documentation

imap_auth_is_valid()

bool imap_auth_is_valid

(

const char *

authenticator

)

Check if string is a valid imap authentication method.

Parameters

authenticator

Authenticator string to check

Return values

true	Argument is a valid auth method

Validate whether an input string is an accepted imap authentication method as defined by ImapAuthenticators.

Definition at line 96 of file auth.c.

{
  for (size_t i = 0; i < countof(ImapAuthenticators); i++)
  {
    const struct ImapAuth *auth = &ImapAuthenticators[i];
    if (auth->method && mutt_istr_equal(auth->method, authenticator))
      return true;
  }
 
  return false;
}

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imap_authenticate()

int imap_authenticate

(

struct ImapAccountData *

adata

)

Authenticate to an IMAP server.

Parameters

adata

Imap Account data

Return values

enum	ImapAuthRes, e.g. IMAP_AUTH_SUCCESS

Attempt to authenticate using either user-specified authentication method if specified, or any.

Definition at line 116 of file auth.c.

{
  int rc = IMAP_AUTH_FAILURE;
 
  const struct Slist *c_imap_authenticators = cs_subset_slist(NeoMutt->sub, "imap_authenticators");
  if (c_imap_authenticators && (c_imap_authenticators->count > 0))
  {
    mutt_debug(LL_DEBUG2, "Trying user-defined imap_authenticators\n");
 
    /* Try user-specified list of authentication methods */
    struct ListNode *np = NULL;
    STAILQ_FOREACH(np, &c_imap_authenticators->head, entries)
    {
      mutt_debug(LL_DEBUG2, "Trying method %s\n", np->data);
 
      for (size_t i = 0; i < countof(ImapAuthenticators); i++)
      {
        const struct ImapAuth *auth = &ImapAuthenticators[i];
        if (!auth->method || mutt_istr_equal(auth->method, np->data))
        {
          rc = auth->authenticate(adata, np->data);
          if (rc == IMAP_AUTH_SUCCESS)
          {
            return rc;
          }
        }
      }
    }
  }
  else
  {
    /* Fall back to default: any authenticator */
    mutt_debug(LL_DEBUG2, "Trying pre-defined imap_authenticators\n");
 
    for (size_t i = 0; i < countof(ImapAuthenticators); i++)
    {
      rc = ImapAuthenticators[i].authenticate(adata, NULL);
      if (rc == IMAP_AUTH_SUCCESS)
        return rc;
    }
  }
 
  mutt_error(_("No authenticators available or wrong credentials"));
  return rc;
}

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Variable Documentation

ImapAuthenticators

const struct ImapAuth ImapAuthenticators[]

static

Initial value:

= {
  
  { imap_auth_oauth, "oauthbearer" },
  { imap_auth_xoauth2, "xoauth2" },
  { imap_auth_plain, "plain" },
 
 
 
 
 
  { imap_auth_anon, "anonymous" },
 
 
  { imap_auth_gss, "gssapi" },
 
 
 
  { imap_auth_cram_md5, "cram-md5" },
 
  { imap_auth_login, "login" },
  
}

Accepted authentication methods.

Definition at line 65 of file auth.c.

                                                    {
  // clang-format off
  { imap_auth_oauth, "oauthbearer" },
  { imap_auth_xoauth2, "xoauth2" },
  { imap_auth_plain, "plain" },
#if defined(USE_SASL_CYRUS)
  { imap_auth_sasl, NULL },
#elif defined(USE_SASL_GNU)
  { imap_auth_gsasl, NULL },
#else
  { imap_auth_anon, "anonymous" },
#endif
#ifdef USE_GSS
  { imap_auth_gss, "gssapi" },
#endif
/* SASL includes CRAM-MD5 (and GSSAPI, but that's not enabled by default) */
#ifndef HAVE_SASL
  { imap_auth_cram_md5, "cram-md5" },
#endif
  { imap_auth_login, "login" },
  // clang-format on
};