X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/6039eeef82bbc5468a6b755e8ab4028ce9f692cd..HEAD:/monitor.c diff --git a/monitor.c b/monitor.c index d6df656b..ace25c40 100644 --- a/monitor.c +++ b/monitor.c @@ -1,3 +1,4 @@ +/* $OpenBSD: monitor.c,v 1.104 2009/06/12 20:43:22 andreas Exp $ */ /* * Copyright 2002 Niels Provos * Copyright 2002 Markus Friedl @@ -25,16 +26,39 @@ */ #include "includes.h" -RCSID("$OpenBSD: monitor.c,v 1.61 2004/07/17 05:31:41 dtucker Exp $"); -#include +#include +#include +#include +#include "openbsd-compat/sys-tree.h" +#include + +#include +#include +#ifdef HAVE_PATHS_H +#include +#endif +#include +#include +#include +#include +#include +#include #ifdef SKEY #include #endif +#include + +#include "openbsd-compat/sys-queue.h" +#include "xmalloc.h" #include "ssh.h" +#include "key.h" +#include "buffer.h" +#include "hostfile.h" #include "auth.h" +#include "cipher.h" #include "kex.h" #include "dh.h" #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ @@ -55,17 +79,18 @@ RCSID("$OpenBSD: monitor.c,v 1.61 2004/07/17 05:31:41 dtucker Exp $"); #include "servconf.h" #include "monitor.h" #include "monitor_mm.h" +#ifdef GSSAPI +#include "ssh-gss.h" +#endif #include "monitor_wrap.h" #include "monitor_fdpass.h" -#include "xmalloc.h" #include "misc.h" -#include "buffer.h" -#include "bufaux.h" #include "compat.h" #include "ssh2.h" +#include "jpake.h" +#include "roaming.h" #ifdef GSSAPI -#include "ssh-gss.h" static Gssctxt *gsscontext = NULL; #endif @@ -76,7 +101,6 @@ extern Newkeys *current_keys[]; extern z_stream incoming_stream; extern z_stream outgoing_stream; extern u_char session_id[]; -extern Buffer input, output; extern Buffer auth_debug; extern int auth_debug_init; extern Buffer loginmsg; @@ -102,6 +126,8 @@ struct { u_int ilen; u_char *output; u_int olen; + u_int64_t sent_bytes; + u_int64_t recv_bytes; } child_state; /* Functions on the monitor that answer unprivileged requests */ @@ -126,6 +152,11 @@ int mm_answer_rsa_challenge(int, Buffer *); int mm_answer_rsa_response(int, Buffer *); int mm_answer_sesskey(int, Buffer *); int mm_answer_sessid(int, Buffer *); +int mm_answer_jpake_get_pwdata(int, Buffer *); +int mm_answer_jpake_step1(int, Buffer *); +int mm_answer_jpake_step2(int, Buffer *); +int mm_answer_jpake_key_confirm(int, Buffer *); +int mm_answer_jpake_check_confirm(int, Buffer *); #ifdef USE_PAM int mm_answer_pam_start(int, Buffer *); @@ -171,6 +202,7 @@ struct mon_table { #define MON_ISAUTH 0x0004 /* Required for Authentication */ #define MON_AUTHDECIDE 0x0008 /* Decides Authentication */ #define MON_ONCE 0x0010 /* Disable after calling */ +#define MON_ALOG 0x0020 /* Log auth attempt without authenticating */ #define MON_AUTH (MON_ISAUTH|MON_AUTHDECIDE) @@ -192,11 +224,11 @@ struct mon_table mon_dispatch_proto20[] = { {MONITOR_REQ_PAM_FREE_CTX, MON_ONCE|MON_AUTHDECIDE, mm_answer_pam_free_ctx}, #endif #ifdef SSH_AUDIT_EVENTS - {MONITOR_REQ_AUDIT_EVENT, 0, mm_answer_audit_event}, + {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event}, #endif #ifdef BSD_AUTH {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery}, - {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH,mm_answer_bsdauthrespond}, + {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH, mm_answer_bsdauthrespond}, #endif #ifdef SKEY {MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery}, @@ -209,6 +241,13 @@ struct mon_table mon_dispatch_proto20[] = { {MONITOR_REQ_GSSSTEP, MON_ISAUTH, mm_answer_gss_accept_ctx}, {MONITOR_REQ_GSSUSEROK, MON_AUTH, mm_answer_gss_userok}, {MONITOR_REQ_GSSCHECKMIC, MON_ISAUTH, mm_answer_gss_checkmic}, +#endif +#ifdef JPAKE + {MONITOR_REQ_JPAKE_GET_PWDATA, MON_ONCE, mm_answer_jpake_get_pwdata}, + {MONITOR_REQ_JPAKE_STEP1, MON_ISAUTH, mm_answer_jpake_step1}, + {MONITOR_REQ_JPAKE_STEP2, MON_ONCE, mm_answer_jpake_step2}, + {MONITOR_REQ_JPAKE_KEY_CONFIRM, MON_ONCE, mm_answer_jpake_key_confirm}, + {MONITOR_REQ_JPAKE_CHECK_CONFIRM, MON_AUTH, mm_answer_jpake_check_confirm}, #endif {0, 0, NULL} }; @@ -231,13 +270,13 @@ struct mon_table mon_dispatch_proto15[] = { {MONITOR_REQ_SESSKEY, MON_ONCE, mm_answer_sesskey}, {MONITOR_REQ_SESSID, MON_ONCE, mm_answer_sessid}, {MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword}, - {MONITOR_REQ_RSAKEYALLOWED, MON_ISAUTH, mm_answer_rsa_keyallowed}, - {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed}, + {MONITOR_REQ_RSAKEYALLOWED, MON_ISAUTH|MON_ALOG, mm_answer_rsa_keyallowed}, + {MONITOR_REQ_KEYALLOWED, MON_ISAUTH|MON_ALOG, mm_answer_keyallowed}, {MONITOR_REQ_RSACHALLENGE, MON_ONCE, mm_answer_rsa_challenge}, {MONITOR_REQ_RSARESPONSE, MON_ONCE|MON_AUTHDECIDE, mm_answer_rsa_response}, #ifdef BSD_AUTH {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery}, - {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH,mm_answer_bsdauthrespond}, + {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH, mm_answer_bsdauthrespond}, #endif #ifdef SKEY {MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery}, @@ -252,7 +291,7 @@ struct mon_table mon_dispatch_proto15[] = { {MONITOR_REQ_PAM_FREE_CTX, MON_ONCE|MON_AUTHDECIDE, mm_answer_pam_free_ctx}, #endif #ifdef SSH_AUDIT_EVENTS - {MONITOR_REQ_AUDIT_EVENT, 0, mm_answer_audit_event}, + {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event}, #endif {0, 0, NULL} }; @@ -310,6 +349,8 @@ monitor_child_preauth(Authctxt *_authctxt, struct monitor *pmonitor) authctxt = _authctxt; memset(authctxt, 0, sizeof(*authctxt)); + authctxt->loginmsg = &loginmsg; + if (compat20) { mon_dispatch = mon_dispatch_proto20; @@ -324,7 +365,8 @@ monitor_child_preauth(Authctxt *_authctxt, struct monitor *pmonitor) /* The first few requests do not require asynchronous access */ while (!authenticated) { - authenticated = monitor_read(pmonitor, mon_dispatch, &ent); + auth_method = "unknown"; + authenticated = (monitor_read(pmonitor, mon_dispatch, &ent) == 1); if (authenticated) { if (!(ent->flags & MON_AUTHDECIDE)) fatal("%s: unexpected authentication from %d", @@ -346,16 +388,27 @@ monitor_child_preauth(Authctxt *_authctxt, struct monitor *pmonitor) #endif } - if (ent->flags & MON_AUTHDECIDE) { + if (ent->flags & (MON_AUTHDECIDE|MON_ALOG)) { auth_log(authctxt, authenticated, auth_method, compat20 ? " ssh2" : ""); if (!authenticated) authctxt->failures++; } +#ifdef JPAKE + /* Cleanup JPAKE context after authentication */ + if (ent->flags & MON_AUTHDECIDE) { + if (authctxt->jpake_ctx != NULL) { + jpake_free(authctxt->jpake_ctx); + authctxt->jpake_ctx = NULL; + } + } +#endif } if (!authctxt->valid) fatal("%s: authenticated invalid user", __func__); + if (strcmp(auth_method, "unknown") == 0) + fatal("%s: authentication method name unknown", __func__); debug("%s: %s has been authenticated by privileged process", __func__, authctxt->user); @@ -381,6 +434,7 @@ monitor_child_postauth(struct monitor *pmonitor) monitor_set_child_handler(pmonitor->m_pid); signal(SIGHUP, &monitor_child_handler); signal(SIGTERM, &monitor_child_handler); + signal(SIGINT, &monitor_child_handler); if (compat20) { mon_dispatch = mon_dispatch_postauth20; @@ -535,7 +589,11 @@ mm_answer_sign(int sock, Buffer *m) keyid = buffer_get_int(m); p = buffer_get_string(m, &datlen); - if (datlen != 20) + /* + * Supported KEX types will only return SHA1 (20 byte) or + * SHA256 (32 byte) hashes + */ + if (datlen != 20 && datlen != 32) fatal("%s: data length incorrect: %u", __func__, datlen); /* save session id, it will be passed on the first call */ @@ -612,6 +670,9 @@ mm_answer_pwnamallow(int sock, Buffer *m) buffer_put_cstring(m, pwent->pw_shell); out: + buffer_put_string(m, &options, sizeof(options)); + if (options.banner != NULL) + buffer_put_cstring(m, options.banner); debug3("%s: sending MONITOR_ANS_PWNAM: %d", __func__, allowed); mm_request_send(sock, MONITOR_ANS_PWNAM, m); @@ -628,9 +689,6 @@ mm_answer_pwnamallow(int sock, Buffer *m) if (options.use_pam) monitor_permit(mon_dispatch, MONITOR_REQ_PAM_START, 1); #endif -#ifdef SSH_AUDIT_EVENTS - monitor_permit(mon_dispatch, MONITOR_REQ_AUDIT_EVENT, 1); -#endif return (0); } @@ -832,9 +890,7 @@ mm_answer_pam_account(int sock, Buffer *m) ret = do_pam_account(); buffer_put_int(m, ret); - buffer_append(&loginmsg, "\0", 1); - buffer_put_cstring(m, buffer_ptr(&loginmsg)); - buffer_clear(&loginmsg); + buffer_put_string(m, buffer_ptr(&loginmsg), buffer_len(&loginmsg)); mm_request_send(sock, MONITOR_ANS_PAM_ACCOUNT, m); @@ -867,8 +923,8 @@ int mm_answer_pam_query(int sock, Buffer *m) { char *name, *info, **prompts; - u_int num, *echo_on; - int i, ret; + u_int i, num, *echo_on; + int ret; debug3("%s", __func__); sshpam_authok = NULL; @@ -893,6 +949,7 @@ mm_answer_pam_query(int sock, Buffer *m) xfree(prompts); if (echo_on != NULL) xfree(echo_on); + auth_method = "keyboard-interactive/pam"; mm_request_send(sock, MONITOR_ANS_PAM_QUERY, m); return (0); } @@ -901,14 +958,14 @@ int mm_answer_pam_respond(int sock, Buffer *m) { char **resp; - u_int num; - int i, ret; + u_int i, num; + int ret; debug3("%s", __func__); sshpam_authok = NULL; num = buffer_get_int(m); if (num > 0) { - resp = xmalloc(num * sizeof(char *)); + resp = xcalloc(num, sizeof(char *)); for (i = 0; i < num; ++i) resp[i] = buffer_get_string(m, NULL); ret = (sshpam_device.respond)(sshpam_ctxt, num, resp); @@ -935,6 +992,7 @@ mm_answer_pam_free_ctx(int sock, Buffer *m) (sshpam_device.free_ctx)(sshpam_ctxt); buffer_clear(m); mm_request_send(sock, MONITOR_ANS_PAM_FREE_CTX, m); + auth_method = "keyboard-interactive/pam"; return (sshpam_authok == sshpam_ctxt); } #endif @@ -976,21 +1034,28 @@ mm_answer_keyallowed(int sock, Buffer *m) debug3("%s: key_from_blob: %p", __func__, key); if (key != NULL && authctxt->valid) { - switch(type) { + switch (type) { case MM_USERKEY: allowed = options.pubkey_authentication && user_key_allowed(authctxt->pw, key); + auth_method = "publickey"; + if (options.pubkey_authentication && allowed != 1) + auth_clear_options(); break; case MM_HOSTKEY: allowed = options.hostbased_authentication && hostbased_key_allowed(authctxt->pw, cuser, chost, key); + auth_method = "hostbased"; break; case MM_RSAHOSTKEY: key->type = KEY_RSA1; /* XXX */ allowed = options.rhosts_rsa_authentication && auth_rhosts_rsa_key_allowed(authctxt->pw, cuser, chost, key); + if (options.rhosts_rsa_authentication && allowed != 1) + auth_clear_options(); + auth_method = "rsa"; break; default: fatal("%s: unknown key type %d", __func__, type); @@ -1010,10 +1075,16 @@ mm_answer_keyallowed(int sock, Buffer *m) key_blobtype = type; hostbased_cuser = cuser; hostbased_chost = chost; + } else { + /* Log failed attempt */ + auth_log(authctxt, 0, auth_method, compat20 ? " ssh2" : ""); + xfree(blob); + xfree(cuser); + xfree(chost); } debug3("%s: key %p is %s", - __func__, key, allowed ? "allowed" : "disallowed"); + __func__, key, allowed ? "allowed" : "not allowed"); buffer_clear(m); buffer_put_int(m, allowed); @@ -1179,7 +1250,7 @@ mm_answer_keyverify(int sock, Buffer *m) verified = key_verify(key, signature, signaturelen, data, datalen); debug3("%s: key %p signature %s", - __func__, key, verified ? "verified" : "unverified"); + __func__, key, (verified == 1) ? "verified" : "unverified"); key_free(key); xfree(blob); @@ -1194,7 +1265,7 @@ mm_answer_keyverify(int sock, Buffer *m) buffer_put_int(m, verified); mm_request_send(sock, MONITOR_ANS_KEYVERIFY, m); - return (verified); + return (verified == 1); } static void @@ -1211,7 +1282,7 @@ mm_record_login(Session *s, struct passwd *pw) fromlen = sizeof(from); if (packet_connection_is_on_socket()) { if (getpeername(packet_get_connection_in(), - (struct sockaddr *) & from, &fromlen) < 0) { + (struct sockaddr *)&from, &fromlen) < 0) { debug("getpeername: %.100s", strerror(errno)); cleanup_exit(255); } @@ -1227,10 +1298,10 @@ mm_session_close(Session *s) { debug3("%s: session %d pid %ld", __func__, s->self, (long)s->pid); if (s->ttyfd != -1) { - debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ptyfd); + debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ptyfd); session_pty_cleanup2(s); } - s->used = 0; + session_unused(s->self); } int @@ -1272,8 +1343,9 @@ mm_answer_pty(int sock, Buffer *m) mm_request_send(sock, MONITOR_ANS_PTY, m); - mm_send_fd(sock, s->ptyfd); - mm_send_fd(sock, s->ttyfd); + if (mm_send_fd(sock, s->ptyfd) == -1 || + mm_send_fd(sock, s->ttyfd) == -1) + fatal("%s: send fds failed", __func__); /* make sure nothing uses fd 0 */ if ((fd0 = open(_PATH_DEVNULL, O_RDONLY)) < 0) @@ -1287,7 +1359,7 @@ mm_answer_pty(int sock, Buffer *m) /* no need to dup() because nobody closes ptyfd */ s->ptymaster = s->ptyfd; - debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ttyfd); + debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ttyfd); return (0); @@ -1322,7 +1394,7 @@ mm_answer_sesskey(int sock, Buffer *m) int rsafail; /* Turn off permissions */ - monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1); + monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 0); if ((p = BN_new()) == NULL) fatal("%s: BN_new", __func__); @@ -1374,6 +1446,7 @@ mm_answer_rsa_keyallowed(int sock, Buffer *m) debug3("%s entering", __func__); + auth_method = "rsa"; if (options.rsa_authentication && authctxt->valid) { if ((client_n = BN_new()) == NULL) fatal("%s: BN_new", __func__); @@ -1429,7 +1502,9 @@ mm_answer_rsa_challenge(int sock, Buffer *m) fatal("%s: key type mismatch", __func__); if ((key = key_from_blob(blob, blen)) == NULL) fatal("%s: received bad key", __func__); - + if (key->type != KEY_RSA) + fatal("%s: received bad key type %d", __func__, key->type); + key->type = KEY_RSA1; if (ssh1_challenge) BN_clear_free(ssh1_challenge); ssh1_challenge = auth_rsa_generate_challenge(key); @@ -1503,6 +1578,11 @@ mm_answer_term(int sock, Buffer *req) /* The child is terminating */ session_destroy_all(&mm_session_close); +#ifdef USE_PAM + if (options.use_pam) + sshpam_cleanup(); +#endif + while (waitpid(pmonitor->m_pid, &status, 0) == -1) if (errno != EINTR) exit(1); @@ -1523,7 +1603,6 @@ mm_answer_audit_event(int socket, Buffer *m) debug3("%s entering", __func__); event = buffer_get_int(m); - buffer_free(m); switch(event) { case SSH_AUTH_FAIL_PUBKEY: case SSH_AUTH_FAIL_HOSTBASED: @@ -1552,7 +1631,6 @@ mm_answer_audit_command(int socket, Buffer *m) /* sanity check command, if so how? */ audit_run_command(cmd); xfree(cmd); - buffer_free(m); return (0); } #endif /* SSH_AUDIT_EVENTS */ @@ -1594,15 +1672,20 @@ monitor_apply_keystate(struct monitor *pmonitor) /* Network I/O buffers */ /* XXX inefficient for large buffers, need: buffer_init_from_string */ - buffer_clear(&input); - buffer_append(&input, child_state.input, child_state.ilen); + buffer_clear(packet_get_input()); + buffer_append(packet_get_input(), child_state.input, child_state.ilen); memset(child_state.input, 0, child_state.ilen); xfree(child_state.input); - buffer_clear(&output); - buffer_append(&output, child_state.output, child_state.olen); + buffer_clear(packet_get_output()); + buffer_append(packet_get_output(), child_state.output, + child_state.olen); memset(child_state.output, 0, child_state.olen); xfree(child_state.output); + + /* Roaming */ + if (compat20) + roam_set_bytes(child_state.sent_bytes, child_state.recv_bytes); } static Kex * @@ -1612,8 +1695,7 @@ mm_get_kex(Buffer *m) void *blob; u_int bloblen; - kex = xmalloc(sizeof(*kex)); - memset(kex, 0, sizeof(*kex)); + kex = xcalloc(1, sizeof(*kex)); kex->session_id = buffer_get_string(m, &kex->session_id_len); if ((session_id2 == NULL) || (kex->session_id_len != session_id2_len) || @@ -1623,6 +1705,7 @@ mm_get_kex(Buffer *m) kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server; kex->kex[KEX_DH_GRP14_SHA1] = kexdh_server; kex->kex[KEX_DH_GEX_SHA1] = kexgex_server; + kex->kex[KEX_DH_GEX_SHA256] = kexgex_server; kex->server = 1; kex->hostkey_type = buffer_get_int(m); kex->kex_type = buffer_get_int(m); @@ -1653,7 +1736,7 @@ mm_get_keystate(struct monitor *pmonitor) u_char *blob, *p; u_int bloblen, plen; u_int32_t seqnr, packets; - u_int64_t blocks; + u_int64_t blocks, bytes; debug3("%s: Waiting for new keys", __func__); @@ -1686,11 +1769,13 @@ mm_get_keystate(struct monitor *pmonitor) seqnr = buffer_get_int(&m); blocks = buffer_get_int64(&m); packets = buffer_get_int(&m); - packet_set_state(MODE_OUT, seqnr, blocks, packets); + bytes = buffer_get_int64(&m); + packet_set_state(MODE_OUT, seqnr, blocks, packets, bytes); seqnr = buffer_get_int(&m); blocks = buffer_get_int64(&m); packets = buffer_get_int(&m); - packet_set_state(MODE_IN, seqnr, blocks, packets); + bytes = buffer_get_int64(&m); + packet_set_state(MODE_IN, seqnr, blocks, packets, bytes); skip: /* Get the key context */ @@ -1716,6 +1801,12 @@ mm_get_keystate(struct monitor *pmonitor) child_state.input = buffer_get_string(&m, &child_state.ilen); child_state.output = buffer_get_string(&m, &child_state.olen); + /* Roaming */ + if (compat20) { + child_state.sent_bytes = buffer_get_int64(&m); + child_state.recv_bytes = buffer_get_int64(&m); + } + buffer_free(&m); } @@ -1782,9 +1873,8 @@ monitor_init(void) struct monitor *mon; int pair[2]; - mon = xmalloc(sizeof(*mon)); + mon = xcalloc(1, sizeof(*mon)); - mon->m_pid = 0; monitor_socketpair(pair); mon->m_recvfd = pair[0]; @@ -1831,7 +1921,7 @@ mm_answer_gss_setup_ctx(int sock, Buffer *m) buffer_clear(m); buffer_put_int(m, major); - mm_request_send(sock,MONITOR_ANS_GSSSETUP, m); + mm_request_send(sock, MONITOR_ANS_GSSSETUP, m); /* Now we have a context, enable the step */ monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP, 1); @@ -1844,7 +1934,7 @@ mm_answer_gss_accept_ctx(int sock, Buffer *m) { gss_buffer_desc in; gss_buffer_desc out = GSS_C_EMPTY_BUFFER; - OM_uint32 major,minor; + OM_uint32 major, minor; OM_uint32 flags = 0; /* GSI needs this */ u_int len; @@ -1861,7 +1951,7 @@ mm_answer_gss_accept_ctx(int sock, Buffer *m) gss_release_buffer(&minor, &out); - if (major==GSS_S_COMPLETE) { + if (major == GSS_S_COMPLETE) { monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP, 0); monitor_permit(mon_dispatch, MONITOR_REQ_GSSUSEROK, 1); monitor_permit(mon_dispatch, MONITOR_REQ_GSSCHECKMIC, 1); @@ -1910,9 +2000,212 @@ mm_answer_gss_userok(int sock, Buffer *m) debug3("%s: sending result %d", __func__, authenticated); mm_request_send(sock, MONITOR_ANS_GSSUSEROK, m); - auth_method="gssapi-with-mic"; + auth_method = "gssapi-with-mic"; /* Monitor loop will terminate if authenticated */ return (authenticated); } #endif /* GSSAPI */ + +#ifdef JPAKE +int +mm_answer_jpake_step1(int sock, Buffer *m) +{ + struct jpake_ctx *pctx; + u_char *x3_proof, *x4_proof; + u_int x3_proof_len, x4_proof_len; + + if (!options.zero_knowledge_password_authentication) + fatal("zero_knowledge_password_authentication disabled"); + + if (authctxt->jpake_ctx != NULL) + fatal("%s: authctxt->jpake_ctx already set (%p)", + __func__, authctxt->jpake_ctx); + authctxt->jpake_ctx = pctx = jpake_new(); + + jpake_step1(pctx->grp, + &pctx->server_id, &pctx->server_id_len, + &pctx->x3, &pctx->x4, &pctx->g_x3, &pctx->g_x4, + &x3_proof, &x3_proof_len, + &x4_proof, &x4_proof_len); + + JPAKE_DEBUG_CTX((pctx, "step1 done in %s", __func__)); + + buffer_clear(m); + + buffer_put_string(m, pctx->server_id, pctx->server_id_len); + buffer_put_bignum2(m, pctx->g_x3); + buffer_put_bignum2(m, pctx->g_x4); + buffer_put_string(m, x3_proof, x3_proof_len); + buffer_put_string(m, x4_proof, x4_proof_len); + + debug3("%s: sending step1", __func__); + mm_request_send(sock, MONITOR_ANS_JPAKE_STEP1, m); + + bzero(x3_proof, x3_proof_len); + bzero(x4_proof, x4_proof_len); + xfree(x3_proof); + xfree(x4_proof); + + monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_GET_PWDATA, 1); + monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP1, 0); + + return 0; +} + +int +mm_answer_jpake_get_pwdata(int sock, Buffer *m) +{ + struct jpake_ctx *pctx = authctxt->jpake_ctx; + char *hash_scheme, *salt; + + if (pctx == NULL) + fatal("%s: pctx == NULL", __func__); + + auth2_jpake_get_pwdata(authctxt, &pctx->s, &hash_scheme, &salt); + + buffer_clear(m); + /* pctx->s is sensitive, not returned to slave */ + buffer_put_cstring(m, hash_scheme); + buffer_put_cstring(m, salt); + + debug3("%s: sending pwdata", __func__); + mm_request_send(sock, MONITOR_ANS_JPAKE_GET_PWDATA, m); + + bzero(hash_scheme, strlen(hash_scheme)); + bzero(salt, strlen(salt)); + xfree(hash_scheme); + xfree(salt); + + monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP2, 1); + + return 0; +} + +int +mm_answer_jpake_step2(int sock, Buffer *m) +{ + struct jpake_ctx *pctx = authctxt->jpake_ctx; + u_char *x1_proof, *x2_proof, *x4_s_proof; + u_int x1_proof_len, x2_proof_len, x4_s_proof_len; + + if (pctx == NULL) + fatal("%s: pctx == NULL", __func__); + + if ((pctx->g_x1 = BN_new()) == NULL || + (pctx->g_x2 = BN_new()) == NULL) + fatal("%s: BN_new", __func__); + buffer_get_bignum2(m, pctx->g_x1); + buffer_get_bignum2(m, pctx->g_x2); + pctx->client_id = buffer_get_string(m, &pctx->client_id_len); + x1_proof = buffer_get_string(m, &x1_proof_len); + x2_proof = buffer_get_string(m, &x2_proof_len); + + jpake_step2(pctx->grp, pctx->s, pctx->g_x3, + pctx->g_x1, pctx->g_x2, pctx->x4, + pctx->client_id, pctx->client_id_len, + pctx->server_id, pctx->server_id_len, + x1_proof, x1_proof_len, + x2_proof, x2_proof_len, + &pctx->b, + &x4_s_proof, &x4_s_proof_len); + + JPAKE_DEBUG_CTX((pctx, "step2 done in %s", __func__)); + + bzero(x1_proof, x1_proof_len); + bzero(x2_proof, x2_proof_len); + xfree(x1_proof); + xfree(x2_proof); + + buffer_clear(m); + + buffer_put_bignum2(m, pctx->b); + buffer_put_string(m, x4_s_proof, x4_s_proof_len); + + debug3("%s: sending step2", __func__); + mm_request_send(sock, MONITOR_ANS_JPAKE_STEP2, m); + + bzero(x4_s_proof, x4_s_proof_len); + xfree(x4_s_proof); + + monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_KEY_CONFIRM, 1); + + return 0; +} + +int +mm_answer_jpake_key_confirm(int sock, Buffer *m) +{ + struct jpake_ctx *pctx = authctxt->jpake_ctx; + u_char *x2_s_proof; + u_int x2_s_proof_len; + + if (pctx == NULL) + fatal("%s: pctx == NULL", __func__); + + if ((pctx->a = BN_new()) == NULL) + fatal("%s: BN_new", __func__); + buffer_get_bignum2(m, pctx->a); + x2_s_proof = buffer_get_string(m, &x2_s_proof_len); + + jpake_key_confirm(pctx->grp, pctx->s, pctx->a, + pctx->x4, pctx->g_x3, pctx->g_x4, pctx->g_x1, pctx->g_x2, + pctx->server_id, pctx->server_id_len, + pctx->client_id, pctx->client_id_len, + session_id2, session_id2_len, + x2_s_proof, x2_s_proof_len, + &pctx->k, + &pctx->h_k_sid_sessid, &pctx->h_k_sid_sessid_len); + + JPAKE_DEBUG_CTX((pctx, "key_confirm done in %s", __func__)); + + bzero(x2_s_proof, x2_s_proof_len); + buffer_clear(m); + + /* pctx->k is sensitive, not sent */ + buffer_put_string(m, pctx->h_k_sid_sessid, pctx->h_k_sid_sessid_len); + + debug3("%s: sending confirmation hash", __func__); + mm_request_send(sock, MONITOR_ANS_JPAKE_KEY_CONFIRM, m); + + monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_CHECK_CONFIRM, 1); + + return 0; +} + +int +mm_answer_jpake_check_confirm(int sock, Buffer *m) +{ + int authenticated = 0; + u_char *peer_confirm_hash; + u_int peer_confirm_hash_len; + struct jpake_ctx *pctx = authctxt->jpake_ctx; + + if (pctx == NULL) + fatal("%s: pctx == NULL", __func__); + + peer_confirm_hash = buffer_get_string(m, &peer_confirm_hash_len); + + authenticated = jpake_check_confirm(pctx->k, + pctx->client_id, pctx->client_id_len, + session_id2, session_id2_len, + peer_confirm_hash, peer_confirm_hash_len) && authctxt->valid; + + JPAKE_DEBUG_CTX((pctx, "check_confirm done in %s", __func__)); + + bzero(peer_confirm_hash, peer_confirm_hash_len); + xfree(peer_confirm_hash); + + buffer_clear(m); + buffer_put_int(m, authenticated); + + debug3("%s: sending result %d", __func__, authenticated); + mm_request_send(sock, MONITOR_ANS_JPAKE_CHECK_CONFIRM, m); + + monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP1, 1); + + auth_method = "jpake-01@openssh.com"; + return authenticated; +} + +#endif /* JPAKE */