# Managing authentication: userid and passwords

## Typedefs
typedef struct _LinphoneAuthInfo | LinphoneAuthInfo
## Functions
LinphoneAuthInfo * | linphone_auth_info_new (const char *username, const char *userid, const char *passwd, const char *ha1, const char *realm)
const char * | linphone_auth_info_get_username (const LinphoneAuthInfo *i)
const char * | linphone_auth_info_get_passwd (const LinphoneAuthInfo *i)
void | linphone_auth_info_set_passwd (LinphoneAuthInfo *info, const char *passwd)
void | linphone_auth_info_set_username (LinphoneAuthInfo *info, const char *username)
void | linphone_auth_info_set_userid (LinphoneAuthInfo *info, const char *userid)
void | linphone_auth_info_destroy (LinphoneAuthInfo *obj)
const LinphoneAuthInfo * | linphone_core_find_auth_info (LinphoneCore *lc, const char *realm, const char *username)
void | linphone_core_add_auth_info (LinphoneCore *lc, const LinphoneAuthInfo *info)
void | linphone_core_abort_authentication (LinphoneCore *lc, LinphoneAuthInfo *info)
void | linphone_core_remove_auth_info (LinphoneCore *lc, const LinphoneAuthInfo *info)
const MSList * | linphone_core_get_auth_info_list (const LinphoneCore *lc)
void | linphone_core_clear_all_auth_info (LinphoneCore *lc)

## Typedef Documentation

typedef struct _LinphoneAuthInfo LinphoneAuthInfo

Object holding authentication information.

Note:
  The object's fields should not be accessed directly. Prefer using the accessor methods.

In most case, authentication information consists of a username and password. Sometimes, a userid is required by proxy, and realm can be useful to discriminate different SIP domains.

Once created and filled, a LinphoneAuthInfo must be added to the LinphoneCore in order to become known and used automatically when needed. Use linphone_core_add_auth_info() for that purpose.

The LinphoneCore object can take the initiative to request authentication information when needed to the application through the auth_info_requested callback of the LinphoneCoreVTable structure.

The application can respond to this information request later using linphone_core_add_auth_info(). This will unblock all pending authentication transactions and retry them with authentication headers.

## Function Documentation

LinphoneAuthInfo* linphone_auth_info_new | ( | const char * | username,
|  | const char * | userid,
|  | const char * | passwd,
|  | const char * | ha1,
|  | const char * | realm |
| ) |  |  |

Create a LinphoneAuthInfo object with supplied information.

The object can be created empty, that is with all arguments set to NULL. Username, userid, password and realm can be set later using specific methods.

const char* linphone_auth_info_get_username | ( | const LinphoneAuthInfo * | i | ) |

Returns username.

const char* linphone_auth_info_get_passwd | ( | const LinphoneAuthInfo * | i | ) |

Returns password.

void linphone_auth_info_set_passwd | ( | LinphoneAuthInfo * | info,
|  | const char * | passwd |
| ) |  |  |

Sets the password.

void linphone_auth_info_set_username | ( | LinphoneAuthInfo * | info,
|  | const char * | username |
| ) |  |  |

Sets the username.

void linphone_auth_info_set_userid | ( | LinphoneAuthInfo * | info,
|  | const char * | userid |
| ) |  |  |

Sets userid.

void linphone_auth_info_destroy | ( | LinphoneAuthInfo * | obj | ) |

Destroys a LinphoneAuthInfo object.

const LinphoneAuthInfo* linphone_core_find_auth_info | ( | LinphoneCore * | lc,
|  | const char * | realm,
|  | const char * | username |
| ) |  |  |

Retrieves a LinphoneAuthInfo previously entered into the LinphoneCore.

void linphone_core_add_auth_info | ( | LinphoneCore * | lc,
|  | const LinphoneAuthInfo * | info |
| ) |  |  |

Adds authentication information to the LinphoneCore.

This information will be used during all SIP transacations that require authentication.

void linphone_core_abort_authentication | ( | LinphoneCore * | lc,
|  | LinphoneAuthInfo * | info |
| ) |  |  |

This method is used to abort a user authentication request initiated by LinphoneCore from the auth_info_requested callback of LinphoneCoreVTable.

void linphone_core_remove_auth_info | ( | LinphoneCore * | lc,
|  | const LinphoneAuthInfo * | info |
| ) |  |  |

Removes an authentication information object.

const MSList* linphone_core_get_auth_info_list | ( | const LinphoneCore * | lc | ) |

Returns an unmodifiable list of currently entered LinphoneAuthInfo.

void linphone_core_clear_all_auth_info | ( | LinphoneCore * | lc | ) |

Clear all authentication information.