auth: Add ssh_userauth_agent().
This commit is pretty big cause several functions have been refactored.
Этот коммит содержится в:
Andreas Schneider
родитель
4c1d3b708c
Коммит
c221db0f36
@ -80,12 +80,12 @@ void agent_free(struct ssh_agent_struct *agent);
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*/
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int agent_is_running(struct ssh_session_struct *session);
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int agent_get_ident_count(struct ssh_session_struct *session);
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int ssh_agent_get_ident_count(struct ssh_session_struct *session);
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struct ssh_public_key_struct *agent_get_next_ident(struct ssh_session_struct *session,
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ssh_key ssh_agent_get_next_ident(struct ssh_session_struct *session,
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char **comment);
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struct ssh_public_key_struct *agent_get_first_ident(struct ssh_session_struct *session,
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ssh_key ssh_agent_get_first_ident(struct ssh_session_struct *session,
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char **comment);
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ssh_string agent_sign_data(struct ssh_session_struct *session,
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@ -33,6 +33,10 @@
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LIBSSH_API int ssh_auth_list(ssh_session session);
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LIBSSH_API int ssh_userauth_offer_pubkey(ssh_session session, const char *username, int type, ssh_string publickey);
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LIBSSH_API int ssh_userauth_pubkey(ssh_session session, const char *username, ssh_string publickey, ssh_private_key privatekey);
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#ifndef _WIN32
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LIBSSH_API int ssh_userauth_agent_pubkey(ssh_session session, const char *username,
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ssh_public_key publickey);
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#endif
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LIBSSH_API void buffer_free(ssh_buffer buffer);
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LIBSSH_API void *buffer_get(ssh_buffer buffer);
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@ -500,11 +500,11 @@ LIBSSH_API int ssh_userauth_try_publickey(ssh_session session,
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LIBSSH_API int ssh_userauth_publickey(ssh_session session,
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const char *username,
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const ssh_key privkey);
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#ifndef _WIN32
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LIBSSH_API int ssh_userauth_agent_pubkey(ssh_session session, const char *username,
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ssh_public_key publickey);
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LIBSSH_API int ssh_userauth_agent(ssh_session session,
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const char *username);
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#endif
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LIBSSH_API int ssh_userauth_autopubkey(ssh_session session, const char *passphrase);
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LIBSSH_API int ssh_userauth_kbdint(ssh_session session, const char *user, const char *submethods);
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LIBSSH_API const char *ssh_userauth_kbdint_getinstruction(ssh_session session);
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16
src/agent.c
16
src/agent.c
@ -264,7 +264,7 @@ static int agent_talk(struct ssh_session_struct *session,
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return 0;
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}
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int agent_get_ident_count(struct ssh_session_struct *session) {
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int ssh_agent_get_ident_count(struct ssh_session_struct *session) {
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ssh_buffer request = NULL;
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ssh_buffer reply = NULL;
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unsigned int type = 0;
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@ -337,20 +337,19 @@ int agent_get_ident_count(struct ssh_session_struct *session) {
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}
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/* caller has to free commment */
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struct ssh_public_key_struct *agent_get_first_ident(struct ssh_session_struct *session,
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ssh_key ssh_agent_get_first_ident(struct ssh_session_struct *session,
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char **comment) {
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if (agent_get_ident_count(session) > 0) {
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return agent_get_next_ident(session, comment);
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if (ssh_agent_get_ident_count(session) > 0) {
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return ssh_agent_get_next_ident(session, comment);
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}
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return NULL;
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}
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/* caller has to free commment */
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struct ssh_public_key_struct *agent_get_next_ident(struct ssh_session_struct *session,
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ssh_key ssh_agent_get_next_ident(struct ssh_session_struct *session,
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char **comment) {
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struct ssh_key_struct *key;
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struct ssh_public_key_struct *pkey;
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struct ssh_string_struct *blob = NULL;
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struct ssh_string_struct *tmp = NULL;
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int rc;
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@ -398,10 +397,7 @@ struct ssh_public_key_struct *agent_get_next_ident(struct ssh_session_struct *se
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return NULL;
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}
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pkey = ssh_pki_convert_key_to_publickey(key);
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ssh_key_free(key);
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return pkey;
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return key;
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}
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ssh_string agent_sign_data(struct ssh_session_struct *session,
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557
src/auth.c
557
src/auth.c
@ -803,190 +803,217 @@ fail:
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return SSH_AUTH_ERROR;
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}
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#ifndef _WIN32
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static int ssh_userauth_agent_publickey(ssh_session session,
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const char *username,
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ssh_key pubkey)
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{
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ssh_string str;
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int rc;
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switch(session->pending_call_state) {
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case SSH_PENDING_CALL_NONE:
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break;
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case SSH_PENDING_CALL_AUTH_OFFER_PUBKEY:
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goto pending;
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default:
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ssh_set_error(session,
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SSH_FATAL,
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"Bad call during pending SSH call in ssh_userauth_try_pubkey");
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return SSH_ERROR;
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}
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rc = ssh_userauth_request_service(session);
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if (rc == SSH_AGAIN) {
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return SSH_AUTH_AGAIN;
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} else if (rc == SSH_ERROR) {
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return SSH_AUTH_ERROR;
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}
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/* request */
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rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST);
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if (rc < 0) {
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goto fail;
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}
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/* username */
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if (username) {
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str = ssh_string_from_char(username);
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} else {
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str = ssh_string_from_char(session->username);
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}
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if (str == NULL) {
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goto fail;
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}
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rc = buffer_add_ssh_string(session->out_buffer, str);
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ssh_string_free(str);
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if (rc < 0) {
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goto fail;
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}
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/* service */
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str = ssh_string_from_char("ssh-connection");
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if (str == NULL) {
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goto fail;
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}
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rc = buffer_add_ssh_string(session->out_buffer, str);
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ssh_string_free(str);
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if (rc < 0) {
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goto fail;
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}
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/* method */
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str = ssh_string_from_char("publickey");
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if (str == NULL) {
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goto fail;
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}
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rc = buffer_add_ssh_string(session->out_buffer, str);
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ssh_string_free(str);
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if (rc < 0) {
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goto fail;
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}
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/* private key? */
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rc = buffer_add_u8(session->out_buffer, 1);
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if (rc < 0) {
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goto fail;
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}
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/* algo */
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str = ssh_string_from_char(pubkey->type_c);
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if (rc < 0) {
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goto fail;
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}
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rc = buffer_add_ssh_string(session->out_buffer, str);
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ssh_string_free(str);
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if (rc < 0) {
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goto fail;
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}
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/* public key */
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str = ssh_pki_export_pubkey_blob(pubkey);
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if (str == NULL) {
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goto fail;
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}
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rc = buffer_add_ssh_string(session->out_buffer, str);
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ssh_string_free(str);
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if (rc < 0) {
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goto fail;
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}
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/* sign the buffer with the private key */
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str = ssh_pki_do_sign_agent(session, session->out_buffer, pubkey);
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if (str == NULL) {
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goto fail;
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}
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rc = buffer_add_ssh_string(session->out_buffer, str);
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ssh_string_free(str);
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if (rc < 0) {
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goto fail;
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}
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session->auth_state = SSH_AUTH_STATE_NONE;
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session->pending_call_state = SSH_PENDING_CALL_AUTH_OFFER_PUBKEY;
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rc = packet_send(session);
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if (rc == SSH_ERROR) {
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return SSH_AUTH_ERROR;
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}
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pending:
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rc = ssh_userauth_get_response(session);
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if (rc != SSH_AUTH_AGAIN) {
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session->pending_call_state = SSH_PENDING_CALL_NONE;
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}
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return rc;
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fail:
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ssh_set_error_oom(session);
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buffer_reinit(session->out_buffer);
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return SSH_AUTH_ERROR;
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}
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/**
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* @brief Try to authenticate through public key.
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* @brief Try to do public key authentication with ssh agent.
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*
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* @param[in] session The ssh session to use.
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*
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* @param[in] username The username to authenticate. You can specify NULL if
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* ssh_option_set_username() has been used. You cannot try
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* two different logins in a row.
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* @param[in] username The username, this SHOULD be NULL.
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*
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* @param[in] publickey A public key returned by publickey_from_file(), or NULL
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* to generate automatically from privatekey.
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*
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* @param[in] privatekey A private key returned by privatekey_from_file().
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*
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* @returns SSH_AUTH_ERROR: A serious error happened.\n
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* SSH_AUTH_DENIED: Authentication failed: use another method.\n
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* @return SSH_AUTH_ERROR: A serious error happened.\n
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* SSH_AUTH_DENIED: The server doesn't accept that public key as an
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* authentication token. Try another key or another
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* method.\n
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* SSH_AUTH_PARTIAL: You've been partially authenticated, you still
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* have to use another method.\n
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* SSH_AUTH_SUCCESS: Authentication successful.
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* SSH_AUTH_SUCCESS: The public key is accepted, you want now to use
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* ssh_userauth_pubkey().
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* SSH_AUTH_AGAIN: In nonblocking mode, you've got to call this again
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* later.
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* @see publickey_from_file()
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* @see privatekey_from_file()
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* @see privatekey_free()
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* @see ssh_userauth_offer_pubkey()
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*
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* @note Most server implementations do not permit changing the username during
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* authentication. The username should only be set with ssh_optoins_set() only
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* before you connect to the server.
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*/
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int ssh_userauth_pki_pubkey(ssh_session session, const char *username,
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ssh_string publickey, ssh_key privatekey) {
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ssh_string user = NULL;
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ssh_string service = NULL;
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ssh_string method = NULL;
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ssh_string algo = NULL;
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ssh_string sign = NULL;
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ssh_key pubkey = NULL;
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ssh_string pkstr = NULL;
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int rc = SSH_AUTH_ERROR;
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int ssh_userauth_agent(ssh_session session,
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const char *username)
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{
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ssh_key pubkey;
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char *comment;
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int rc;
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if (session == NULL) {
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return SSH_AUTH_ERROR;
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}
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if(privatekey == NULL) {
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ssh_set_error(session, SSH_FATAL, "invalid arguments");
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if (!agent_is_running(session)) {
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return SSH_AUTH_DENIED;
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}
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for (pubkey = ssh_agent_get_first_ident(session, &comment);
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pubkey != NULL;
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pubkey = ssh_agent_get_next_ident(session, &comment)) {
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ssh_log(session, SSH_LOG_RARE, "Trying identity %s", comment);
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rc = ssh_userauth_try_publickey(session, username, pubkey);
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if (rc == SSH_AUTH_ERROR) {
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ssh_string_free_char(comment);
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ssh_key_free(pubkey);
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return rc;
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} else if (rc != SSH_AUTH_SUCCESS) {
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ssh_log(session, SSH_LOG_PROTOCOL, "Public key of %s refused by server", comment);
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ssh_string_free_char(comment);
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ssh_key_free(pubkey);
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continue;
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}
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ssh_log(session, SSH_LOG_PROTOCOL, "Public key of %s accepted by server", comment);
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rc = ssh_userauth_agent_publickey(session, username, pubkey);
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ssh_string_free_char(comment);
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ssh_key_free(pubkey);
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if (rc == SSH_AUTH_ERROR) {
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return rc;
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} else if (rc != SSH_AUTH_SUCCESS) {
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ssh_log(session,
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SSH_LOG_RARE,
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"Server accepted public key but refused the signature");
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continue;
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}
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return SSH_AUTH_SUCCESS;
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}
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return SSH_AUTH_ERROR;
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}
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enter_function();
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#if 0
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if (session->version == 1) {
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return ssh_userauth1_pubkey(session, username, publickey, privatekey);
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}
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#endif
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if (username == NULL) {
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if (session->username == NULL) {
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if (ssh_options_apply(session) < 0) {
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leave_function();
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return rc;
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}
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}
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user = ssh_string_from_char(session->username);
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} else {
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user = ssh_string_from_char(username);
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}
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if (user == NULL) {
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ssh_set_error_oom(session);
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leave_function();
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return rc;
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}
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switch(session->pending_call_state) {
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case SSH_PENDING_CALL_NONE:
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break;
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case SSH_PENDING_CALL_AUTH_PUBKEY:
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ssh_string_free(user);
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user = NULL;
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goto pending;
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default:
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ssh_set_error(session, SSH_FATAL,
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"Bad call during pending SSH call in ssh_userauth_pubkey");
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goto error;
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rc = SSH_ERROR;
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}
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rc = ssh_userauth_request_service(session);
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if (rc < 0) {
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ssh_string_free(user);
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leave_function();
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return rc;
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}
|
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service = ssh_string_from_char("ssh-connection");
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if (service == NULL) {
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ssh_set_error_oom(session);
|
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goto error;
|
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}
|
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method = ssh_string_from_char("publickey");
|
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if (method == NULL) {
|
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ssh_set_error_oom(session);
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goto error;
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}
|
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algo = ssh_string_from_char(ssh_type_to_char(privatekey->type));
|
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if (algo == NULL) {
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ssh_set_error_oom(session);
|
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goto error;
|
||||
}
|
||||
if (publickey == NULL) {
|
||||
pubkey = ssh_pki_publickey_from_privatekey(privatekey);
|
||||
if (pubkey == NULL) {
|
||||
/* most likely oom, and publickey_from_privatekey does not
|
||||
* return any more information */
|
||||
ssh_set_error_oom(session);
|
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goto error;
|
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}
|
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pkstr = publickey_to_string(ssh_pki_convert_key_to_publickey(pubkey));
|
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free(pubkey);
|
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if (pkstr == NULL) {
|
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/* same as above */
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
}
|
||||
}
|
||||
|
||||
/* we said previously the public key was accepted */
|
||||
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 ||
|
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buffer_add_ssh_string(session->out_buffer, algo) < 0 ||
|
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buffer_add_ssh_string(session->out_buffer, (publickey == NULL ? pkstr : publickey)) < 0) {
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
}
|
||||
|
||||
ssh_string_free(user);
|
||||
ssh_string_free(service);
|
||||
ssh_string_free(method);
|
||||
ssh_string_free(algo);
|
||||
ssh_string_free(pkstr);
|
||||
|
||||
sign = ssh_pki_do_sign(session,session->out_buffer, privatekey);
|
||||
if(sign == NULL) {
|
||||
ssh_set_error_oom(session);
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
|
||||
if (buffer_add_ssh_string(session->out_buffer, sign) < 0) {
|
||||
ssh_set_error_oom(session);
|
||||
ssh_string_free(sign);
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
|
||||
ssh_string_free(sign);
|
||||
session->auth_state = SSH_AUTH_STATE_NONE;
|
||||
session->pending_call_state = SSH_PENDING_CALL_AUTH_PUBKEY;
|
||||
if (packet_send(session) == SSH_ERROR) {
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
|
||||
pending:
|
||||
rc = ssh_userauth_get_response(session);
|
||||
if (rc != SSH_AUTH_AGAIN)
|
||||
session->pending_call_state = SSH_PENDING_CALL_NONE;
|
||||
leave_function();
|
||||
return rc;
|
||||
|
||||
error:
|
||||
buffer_reinit(session->out_buffer);
|
||||
ssh_string_free(user);
|
||||
ssh_string_free(service);
|
||||
ssh_string_free(method);
|
||||
ssh_string_free(algo);
|
||||
ssh_string_free(pkstr);
|
||||
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Try to authenticate through a private key file.
|
||||
*
|
||||
@ -1057,137 +1084,30 @@ error:
|
||||
}
|
||||
|
||||
#ifndef _WIN32
|
||||
/**
|
||||
* @brief Try to authenticate through public key with an ssh agent.
|
||||
*
|
||||
* @param[in] session The ssh session to use.
|
||||
*
|
||||
* @param[in] 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[in] 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,
|
||||
ssh_public_key publickey) {
|
||||
ssh_string user = NULL;
|
||||
ssh_string service = NULL;
|
||||
ssh_string method = NULL;
|
||||
ssh_string algo = NULL;
|
||||
ssh_string key = NULL;
|
||||
ssh_string sign = NULL;
|
||||
int rc = SSH_AUTH_ERROR;
|
||||
int ssh_userauth_agent_pubkey(ssh_session session,
|
||||
const char *username,
|
||||
ssh_public_key publickey)
|
||||
{
|
||||
ssh_key key;
|
||||
int rc;
|
||||
|
||||
enter_function();
|
||||
|
||||
if (! agent_is_running(session)) {
|
||||
return rc;
|
||||
}
|
||||
|
||||
if (username == NULL) {
|
||||
if (session->username == NULL) {
|
||||
if (ssh_options_apply(session) < 0) {
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
}
|
||||
user = ssh_string_from_char(session->username);
|
||||
} else {
|
||||
user = ssh_string_from_char(username);
|
||||
}
|
||||
|
||||
if (user == NULL) {
|
||||
ssh_set_error_oom(session);
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
|
||||
rc = ssh_userauth_request_service(session);
|
||||
if (rc < 0) {
|
||||
ssh_string_free(user);
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
|
||||
service = ssh_string_from_char("ssh-connection");
|
||||
if (service == NULL) {
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
}
|
||||
method = ssh_string_from_char("publickey");
|
||||
if (method == NULL) {
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
}
|
||||
algo = ssh_string_from_char(ssh_type_to_char(publickey->type));
|
||||
if (algo == NULL) {
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
}
|
||||
key = publickey_to_string(publickey);
|
||||
key = ssh_key_new();
|
||||
if (key == NULL) {
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
return SSH_AUTH_ERROR;
|
||||
}
|
||||
|
||||
/* we said previously the public key was accepted */
|
||||
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) {
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
}
|
||||
key->type = publickey->type;
|
||||
key->type_c = ssh_key_type_to_char(key->type);
|
||||
key->flags = SSH_KEY_FLAG_PUBLIC;
|
||||
key->dsa = publickey->dsa_pub;
|
||||
key->rsa = publickey->rsa_pub;
|
||||
|
||||
sign = ssh_do_sign_with_agent(session, session->out_buffer, publickey);
|
||||
rc = ssh_userauth_agent_publickey(session, username, key);
|
||||
|
||||
if (sign) {
|
||||
if (buffer_add_ssh_string(session->out_buffer, sign) < 0) {
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
}
|
||||
ssh_string_free(sign);
|
||||
session->auth_state=SSH_AUTH_STATE_NONE;
|
||||
if (packet_send(session) == SSH_ERROR) {
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
rc = ssh_userauth_get_response(session);
|
||||
}
|
||||
key->dsa = NULL;
|
||||
key->rsa = NULL;
|
||||
ssh_key_free(key);
|
||||
|
||||
ssh_string_free(user);
|
||||
ssh_string_free(service);
|
||||
ssh_string_free(method);
|
||||
ssh_string_free(algo);
|
||||
ssh_string_free(key);
|
||||
|
||||
leave_function();
|
||||
|
||||
return rc;
|
||||
error:
|
||||
buffer_reinit(session->out_buffer);
|
||||
ssh_string_free(sign);
|
||||
ssh_string_free(user);
|
||||
ssh_string_free(service);
|
||||
ssh_string_free(method);
|
||||
ssh_string_free(algo);
|
||||
ssh_string_free(key);
|
||||
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
#endif /* _WIN32 */
|
||||
@ -1373,69 +1293,14 @@ int ssh_userauth_autopubkey(ssh_session session, const char *passphrase) {
|
||||
|
||||
/* Try authentication with ssh-agent first */
|
||||
#ifndef _WIN32
|
||||
if (agent_is_running(session)) {
|
||||
char *privkey_file = NULL;
|
||||
|
||||
ssh_log(session, SSH_LOG_RARE,
|
||||
"Trying to authenticate with SSH agent keys as user: %s",
|
||||
session->username);
|
||||
|
||||
for (pubkey = agent_get_first_ident(session, &privkey_file);
|
||||
pubkey != NULL;
|
||||
pubkey = agent_get_next_ident(session, &privkey_file)) {
|
||||
|
||||
ssh_log(session, SSH_LOG_RARE, "Trying identity %s", privkey_file);
|
||||
|
||||
pubkey_string = publickey_to_string(pubkey);
|
||||
if (pubkey_string) {
|
||||
rc = ssh_userauth_offer_pubkey(session, NULL, pubkey->type, pubkey_string);
|
||||
ssh_string_free(pubkey_string);
|
||||
if (rc == SSH_AUTH_ERROR) {
|
||||
SAFE_FREE(privkey_file);
|
||||
publickey_free(pubkey);
|
||||
rc = ssh_userauth_agent(session, NULL);
|
||||
if (rc == SSH_AUTH_ERROR || rc == SSH_AUTH_SUCCESS) {
|
||||
leave_function();
|
||||
|
||||
return rc;
|
||||
} else if (rc != SSH_AUTH_SUCCESS) {
|
||||
ssh_log(session, SSH_LOG_PROTOCOL, "Public key refused by server");
|
||||
SAFE_FREE(privkey_file);
|
||||
publickey_free(pubkey);
|
||||
continue;
|
||||
}
|
||||
ssh_log(session, SSH_LOG_PROTOCOL, "Public key accepted");
|
||||
/* pubkey accepted by server ! */
|
||||
rc = ssh_userauth_agent_pubkey(session, NULL, pubkey);
|
||||
if (rc == SSH_AUTH_ERROR) {
|
||||
SAFE_FREE(privkey_file);
|
||||
publickey_free(pubkey);
|
||||
leave_function();
|
||||
|
||||
return rc;
|
||||
} else if (rc != SSH_AUTH_SUCCESS) {
|
||||
ssh_log(session, SSH_LOG_RARE,
|
||||
"Server accepted public key but refused the signature ;"
|
||||
" It might be a bug of libssh");
|
||||
SAFE_FREE(privkey_file);
|
||||
publickey_free(pubkey);
|
||||
continue;
|
||||
}
|
||||
/* auth success */
|
||||
ssh_log(session, SSH_LOG_PROTOCOL, "Authentication using %s success",
|
||||
privkey_file);
|
||||
SAFE_FREE(privkey_file);
|
||||
publickey_free(pubkey);
|
||||
|
||||
leave_function();
|
||||
|
||||
return SSH_AUTH_SUCCESS;
|
||||
} /* if pubkey */
|
||||
SAFE_FREE(privkey_file);
|
||||
publickey_free(pubkey);
|
||||
} /* for each privkey */
|
||||
} /* if agent is running */
|
||||
#endif
|
||||
|
||||
|
||||
for (it = ssh_list_get_iterator(session->identity);
|
||||
it != NULL;
|
||||
it = it->next) {
|
||||
|
||||
Загрузка…
Ссылка в новой задаче
Block a user