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Improve ssh_userauth_agent_pubkey().

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git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@668 7dcaeef0-15fb-0310-b436-a5af3365683c
This commit is contained in:
Andreas Schneider
2009-04-30 14:51:53 +00:00
parent deb9d30f4d
commit 2ed97906e3
1 changed files with 44 additions and 42 deletions
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86
libssh/auth.c
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@@ -511,21 +511,28 @@ error:
}
#ifndef _WIN32
/** \brief Try to authenticate through public key with ssh agent
* \param session ssh session
* \param username username to authenticate. You can specify NULL if
* ssh_option_set_username() has been used. You cannot try two different logins in a row.
* \param publickey the public key provided by the agent
* \returns SSH_AUTH_ERROR : a serious error happened\n
* SSH_AUTH_DENIED : Authentication failed : use another method\n
* SSH_AUTH_PARTIAL : You've been partially authenticated, you still have to use another method\n
* SSH_AUTH_SUCCESS : Authentication success
* \see publickey_from_file()
* \see privatekey_from_file()
* \see privatekey_free()
* \see ssh_userauth_offer_pubkey()
/**
* @brief Try to authenticate through public key with an ssh agent.
*
* @param session The ssh session to use.
*
* @param username The username to authenticate. You can specify NULL if
* ssh_option_set_username() has been used. You cannot try
* two different logins in a row.
*
* @param publickey The public key provided by the agent.
*
* @returns SSH_AUTH_ERROR: A serious error happened.\n
* SSH_AUTH_DENIED: Authentication failed: use another method.\n
* SSH_AUTH_PARTIAL: You've been partially authenticated, you still
* have to use another method.\n
* SSH_AUTH_SUCCESS: Authentication successful.
*
* @see publickey_from_file()
* @see privatekey_from_file()
* @see privatekey_free()
* @see ssh_userauth_offer_pubkey()
*/
int ssh_userauth_agent_pubkey(SSH_SESSION *session, const char *username,
PUBLIC_KEY *publickey) {
STRING *user = NULL;
@@ -537,29 +544,34 @@ int ssh_userauth_agent_pubkey(SSH_SESSION *session, const char *username,
int rc = SSH_AUTH_ERROR;
enter_function();
if (! agent_is_running(session)) {
return rc;
}
if(username == NULL) {
if((username = session->options->username) == NULL) {
if (ssh_options_default_username(session->options)) {
if (username == NULL) {
if (session->options->username == NULL) {
if (ssh_options_default_username(session->options) < 0) {
leave_function();
return rc;
} else {
username=session->options->username;
}
}
user = string_from_char(session->options->username);
} else {
user = string_from_char(username);
}
if (ask_userauth(session)) {
if (user == NULL) {
leave_function();
return rc;
}
user = string_from_char(username);
if (user == NULL) {
goto error;
if (ask_userauth(session) < 0) {
string_free(user);
leave_function();
return rc;
}
service = string_from_char("ssh-connection");
if (service == NULL) {
goto error;
@@ -578,25 +590,13 @@ int ssh_userauth_agent_pubkey(SSH_SESSION *session, const char *username,
}
/* we said previously the public key was accepted */
if (buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST) < 0) {
goto error;
}
if (buffer_add_ssh_string(session->out_buffer, user) < 0) {
goto error;
}
if (buffer_add_ssh_string(session->out_buffer, service) < 0) {
goto error;
}
if (buffer_add_ssh_string(session->out_buffer, method) < 0) {
goto error;
}
if (buffer_add_u8(session->out_buffer, 1) < 0) {
goto error;
}
if (buffer_add_ssh_string(session->out_buffer, algo) < 0) {
goto error;
}
if (buffer_add_ssh_string(session->out_buffer, key) < 0) {
if (buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST) < 0 ||
buffer_add_ssh_string(session->out_buffer, user) < 0 ||
buffer_add_ssh_string(session->out_buffer, service) < 0 ||
buffer_add_ssh_string(session->out_buffer, method) < 0 ||
buffer_add_u8(session->out_buffer, 1) < 0 ||
buffer_add_ssh_string(session->out_buffer, algo) < 0 ||
buffer_add_ssh_string(session->out_buffer, key) < 0) {
goto error;
}
@@ -613,11 +613,13 @@ int ssh_userauth_agent_pubkey(SSH_SESSION *session, const char *username,
}
rc = wait_auth_status(session,0);
}
string_free(user);
string_free(service);
string_free(method);
string_free(algo);
string_free(key);
leave_function();
return rc;