forked from rpms/openssh
451 lines
14 KiB
Diff
451 lines
14 KiB
Diff
diff -up openssh-5.8p1/audit-bsm.c.audit4 openssh-5.8p1/audit-bsm.c
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--- openssh-5.8p1/audit-bsm.c.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/audit-bsm.c 2011-02-21 18:38:45.000000000 +0100
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@@ -395,4 +395,10 @@ audit_kex_body(int ctos, char *enc, char
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{
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/* not implemented */
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}
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+
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+void
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+audit_session_key_free_body(int ctos)
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+{
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+ /* not implemented */
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+}
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#endif /* BSM */
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diff -up openssh-5.8p1/audit.c.audit4 openssh-5.8p1/audit.c
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--- openssh-5.8p1/audit.c.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/audit.c 2011-02-21 18:38:45.000000000 +0100
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@@ -143,6 +143,12 @@ audit_kex(int ctos, char *enc, char *mac
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PRIVSEP(audit_kex_body(ctos, enc, mac, comp, getpid(), getuid()));
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}
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+void
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+audit_session_key_free(int ctos)
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+{
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+ PRIVSEP(audit_session_key_free_body(ctos));
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+}
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+
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# ifndef CUSTOM_SSH_AUDIT_EVENTS
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/*
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* Null implementations of audit functions.
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@@ -247,5 +253,14 @@ audit_kex_body(int ctos, char *enc, char
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(unsigned)geteuid(), ctos, enc, mac, compress, (long)pid,
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(unsigned)uid);
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}
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+
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+/*
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+ * This will be called on succesfull session key discard
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+ */
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+void
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+audit_session_key_free_body(int ctos)
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+{
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+ debug("audit session key discard euid %d direction %d", geteuid(), ctos);
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+}
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# endif /* !defined CUSTOM_SSH_AUDIT_EVENTS */
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#endif /* SSH_AUDIT_EVENTS */
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diff -up openssh-5.8p1/audit.h.audit4 openssh-5.8p1/audit.h
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--- openssh-5.8p1/audit.h.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/audit.h 2011-02-21 18:38:45.000000000 +0100
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@@ -60,5 +60,7 @@ void audit_unsupported(int);
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void audit_kex(int, char *, char *, char *);
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void audit_unsupported_body(int);
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void audit_kex_body(int, char *, char *, char *, pid_t, uid_t);
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+void audit_session_key_free(int ctos);
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+void audit_session_key_free_body(int ctos);
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#endif /* _SSH_AUDIT_H */
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diff -up openssh-5.8p1/audit-linux.c.audit4 openssh-5.8p1/audit-linux.c
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--- openssh-5.8p1/audit-linux.c.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/audit-linux.c 2011-02-21 18:38:45.000000000 +0100
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@@ -266,6 +266,8 @@ audit_unsupported_body(int what)
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#endif
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}
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+const static char *direction[] = { "from-server", "from-client", "both" };
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+
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void
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audit_kex_body(int ctos, char *enc, char *mac, char *compress, pid_t pid,
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uid_t uid)
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@@ -273,7 +275,6 @@ audit_kex_body(int ctos, char *enc, char
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#ifdef AUDIT_CRYPTO_SESSION
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char buf[AUDIT_LOG_SIZE];
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int audit_fd, audit_ok;
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- const static char *direction[] = { "from-server", "from-client", "both" };
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Cipher *cipher = cipher_by_name(enc);
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snprintf(buf, sizeof(buf), "op=start direction=%s cipher=%s ksize=%d spid=%jd suid=%jd rport=%d laddr=%s lport=%d",
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@@ -297,4 +298,29 @@ audit_kex_body(int ctos, char *enc, char
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#endif
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}
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+void
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+audit_session_key_free_body(int ctos)
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+{
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+ char buf[AUDIT_LOG_SIZE];
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+ int audit_fd, audit_ok;
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+
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+ snprintf(buf, sizeof(buf), "op=destroy kind=session direction=%s rport=%d laddr=%s lport=%d",
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+ direction[ctos], get_remote_port(),
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+ get_local_ipaddr(packet_get_connection_in()),
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+ get_local_port());
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+ audit_fd = audit_open();
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+ if (audit_fd < 0) {
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+ if (errno != EINVAL && errno != EPROTONOSUPPORT &&
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+ errno != EAFNOSUPPORT)
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+ error("cannot open audit");
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+ return;
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+ }
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+ audit_ok = audit_log_user_message(audit_fd, AUDIT_CRYPTO_KEY_USER,
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+ buf, NULL, get_remote_ipaddr(), NULL, 1);
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+ audit_close(audit_fd);
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+ /* do not abort if the error is EPERM and sshd is run as non root user */
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+ if ((audit_ok < 0) && ((audit_ok != -1) || (getuid() == 0)))
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+ error("cannot write into audit");
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+}
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+
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#endif /* USE_LINUX_AUDIT */
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diff -up openssh-5.8p1/auditstub.c.audit4 openssh-5.8p1/auditstub.c
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--- openssh-5.8p1/auditstub.c.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/auditstub.c 2011-02-21 18:38:45.000000000 +0100
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@@ -37,3 +37,7 @@ audit_kex(int ctos, char *enc, char *mac
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{
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}
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+void
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+audit_session_key_free(int ctos)
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+{
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+}
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diff -up openssh-5.8p1/kex.c.audit4 openssh-5.8p1/kex.c
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--- openssh-5.8p1/kex.c.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/kex.c 2011-02-21 18:38:45.000000000 +0100
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@@ -624,3 +624,34 @@ dump_digest(char *msg, u_char *digest, i
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fprintf(stderr, "\n");
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}
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#endif
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+
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+static void
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+enc_destroy(Enc *enc)
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+{
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+ if (enc == NULL)
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+ return;
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+
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+ if (enc->key) {
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+ memset(enc->key, 0, enc->key_len);
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+ xfree(enc->key);
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+ }
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+
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+ if (enc->iv) {
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+ memset(enc->iv, 0, enc->block_size);
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+ xfree(enc->iv);
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+ }
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+
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+ memset(enc, 0, sizeof(*enc));
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+}
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+
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+void
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+newkeys_destroy(Newkeys *newkeys)
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+{
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+ if (newkeys == NULL)
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+ return;
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+
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+ enc_destroy(&newkeys->enc);
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+ mac_destroy(&newkeys->mac);
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+ memset(&newkeys->comp, 0, sizeof(newkeys->comp));
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+}
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+
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diff -up openssh-5.8p1/kex.h.audit4 openssh-5.8p1/kex.h
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--- openssh-5.8p1/kex.h.audit4 2010-09-24 14:11:14.000000000 +0200
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+++ openssh-5.8p1/kex.h 2011-02-21 18:38:45.000000000 +0100
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@@ -156,6 +156,8 @@ void kexgex_server(Kex *);
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void kexecdh_client(Kex *);
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void kexecdh_server(Kex *);
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+void newkeys_destroy(Newkeys *newkeys);
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+
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void
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kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
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BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *);
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diff -up openssh-5.8p1/mac.c.audit4 openssh-5.8p1/mac.c
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--- openssh-5.8p1/mac.c.audit4 2008-06-13 02:58:50.000000000 +0200
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+++ openssh-5.8p1/mac.c 2011-02-21 18:38:45.000000000 +0100
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@@ -162,6 +162,20 @@ mac_clear(Mac *mac)
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mac->umac_ctx = NULL;
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}
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+void
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+mac_destroy(Mac *mac)
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+{
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+ if (mac == NULL)
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+ return;
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+
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+ if (mac->key) {
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+ memset(mac->key, 0, mac->key_len);
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+ xfree(mac->key);
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+ }
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+
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+ memset(mac, 0, sizeof(*mac));
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+}
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+
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/* XXX copied from ciphers_valid */
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#define MAC_SEP ","
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int
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diff -up openssh-5.8p1/mac.h.audit4 openssh-5.8p1/mac.h
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--- openssh-5.8p1/mac.h.audit4 2007-06-11 06:01:42.000000000 +0200
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+++ openssh-5.8p1/mac.h 2011-02-21 18:38:45.000000000 +0100
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@@ -28,3 +28,4 @@ int mac_setup(Mac *, char *);
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int mac_init(Mac *);
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u_char *mac_compute(Mac *, u_int32_t, u_char *, int);
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void mac_clear(Mac *);
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+void mac_destroy(Mac *);
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diff -up openssh-5.8p1/monitor.c.audit4 openssh-5.8p1/monitor.c
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--- openssh-5.8p1/monitor.c.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/monitor.c 2011-02-21 18:38:45.000000000 +0100
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@@ -180,6 +180,7 @@ int mm_answer_audit_event(int, Buffer *)
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int mm_answer_audit_command(int, Buffer *);
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int mm_answer_audit_unsupported_body(int, Buffer *);
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int mm_answer_audit_kex_body(int, Buffer *);
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+int mm_answer_audit_session_key_free_body(int, Buffer *);
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#endif
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static Authctxt *authctxt;
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@@ -230,6 +231,7 @@ struct mon_table mon_dispatch_proto20[]
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{MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
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{MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
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{MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
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+ {MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
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#endif
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#ifdef BSD_AUTH
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{MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},
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@@ -268,6 +270,7 @@ struct mon_table mon_dispatch_postauth20
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{MONITOR_REQ_AUDIT_COMMAND, MON_PERMIT, mm_answer_audit_command},
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{MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
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{MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
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+ {MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
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#endif
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{0, 0, NULL}
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};
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@@ -301,6 +304,7 @@ struct mon_table mon_dispatch_proto15[]
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{MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
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{MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
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{MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
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+ {MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
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#endif
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{0, 0, NULL}
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};
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@@ -314,6 +318,7 @@ struct mon_table mon_dispatch_postauth15
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{MONITOR_REQ_AUDIT_COMMAND, MON_PERMIT|MON_ONCE, mm_answer_audit_command},
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{MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
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{MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
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+ {MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
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#endif
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{0, 0, NULL}
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};
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@@ -2257,4 +2262,18 @@ mm_answer_audit_kex_body(int sock, Buffe
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return 0;
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}
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+int
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+mm_answer_audit_session_key_free_body(int sock, Buffer *m)
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+{
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+ int ctos;
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+
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+ ctos = buffer_get_int(m);
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+
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+ audit_session_key_free_body(ctos);
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+
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+ buffer_clear(m);
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+
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+ mm_request_send(sock, MONITOR_ANS_AUDIT_SESSION_KEY_FREE, m);
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+ return 0;
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+}
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#endif /* SSH_AUDIT_EVENTS */
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diff -up openssh-5.8p1/monitor.h.audit4 openssh-5.8p1/monitor.h
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--- openssh-5.8p1/monitor.h.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/monitor.h 2011-02-21 18:38:45.000000000 +0100
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@@ -68,6 +68,7 @@ enum monitor_reqtype {
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MONITOR_REQ_JPAKE_CHECK_CONFIRM, MONITOR_ANS_JPAKE_CHECK_CONFIRM,
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MONITOR_REQ_AUDIT_UNSUPPORTED, MONITOR_ANS_AUDIT_UNSUPPORTED,
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MONITOR_REQ_AUDIT_KEX, MONITOR_ANS_AUDIT_KEX,
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+ MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MONITOR_ANS_AUDIT_SESSION_KEY_FREE,
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};
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struct mm_master;
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diff -up openssh-5.8p1/monitor_wrap.c.audit4 openssh-5.8p1/monitor_wrap.c
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--- openssh-5.8p1/monitor_wrap.c.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/monitor_wrap.c 2011-02-21 18:38:45.000000000 +0100
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@@ -1449,4 +1449,17 @@ mm_audit_kex_body(int ctos, char *cipher
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buffer_free(&m);
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}
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+
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+void
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+mm_audit_session_key_free_body(int ctos)
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+{
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+ Buffer m;
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+
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+ buffer_init(&m);
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+ buffer_put_int(&m, ctos);
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+ mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_SESSION_KEY_FREE, &m);
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+ mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUDIT_SESSION_KEY_FREE,
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+ &m);
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+ buffer_free(&m);
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+}
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#endif /* SSH_AUDIT_EVENTS */
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diff -up openssh-5.8p1/monitor_wrap.h.audit4 openssh-5.8p1/monitor_wrap.h
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--- openssh-5.8p1/monitor_wrap.h.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/monitor_wrap.h 2011-02-21 18:39:26.000000000 +0100
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@@ -76,6 +76,7 @@ void mm_audit_event(ssh_audit_event_t);
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void mm_audit_run_command(const char *);
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void mm_audit_unsupported_body(int);
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void mm_audit_kex_body(int, char *, char *, char *, pid_t, uid_t);
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+void mm_audit_session_key_free_body(int);
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#endif
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struct Session;
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diff -up openssh-5.8p1/packet.c.audit4 openssh-5.8p1/packet.c
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--- openssh-5.8p1/packet.c.audit4 2010-11-24 00:46:37.000000000 +0100
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+++ openssh-5.8p1/packet.c 2011-02-21 18:38:45.000000000 +0100
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@@ -497,6 +497,7 @@ packet_close(void)
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}
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cipher_cleanup(&active_state->send_context);
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cipher_cleanup(&active_state->receive_context);
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+ audit_session_key_free(2);
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}
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/* Sets remote side protocol flags. */
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@@ -756,6 +757,7 @@ set_newkeys(int mode)
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}
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if (active_state->newkeys[mode] != NULL) {
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debug("set_newkeys: rekeying");
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+ audit_session_key_free(mode);
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cipher_cleanup(cc);
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enc = &active_state->newkeys[mode]->enc;
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mac = &active_state->newkeys[mode]->mac;
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@@ -1912,6 +1914,34 @@ packet_get_newkeys(int mode)
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return (void *)active_state->newkeys[mode];
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}
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+static void
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+packet_destroy_state(struct session_state *state)
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+{
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+ if (state == NULL)
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+ return;
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+
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+ cipher_cleanup(&state->receive_context);
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+ cipher_cleanup(&state->send_context);
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+
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+ buffer_free(&state->input);
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+ buffer_free(&state->output);
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+ buffer_free(&state->outgoing_packet);
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+ buffer_free(&state->incoming_packet);
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+ buffer_free(&state->compression_buffer);
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+ newkeys_destroy(state->newkeys[MODE_IN]);
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+ newkeys_destroy(state->newkeys[MODE_OUT]);
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+ mac_destroy(state->packet_discard_mac);
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+// TAILQ_HEAD(, packet) outgoing;
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+// memset(state, 0, sizeof(state));
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+}
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+
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+void
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+packet_destroy_all(void)
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+{
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+ packet_destroy_state(active_state);
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+ packet_destroy_state(backup_state);
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+}
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+
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/*
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* Save the state for the real connection, and use a separate state when
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* resuming a suspended connection.
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@@ -1919,18 +1949,12 @@ packet_get_newkeys(int mode)
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void
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packet_backup_state(void)
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{
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- struct session_state *tmp;
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-
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close(active_state->connection_in);
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active_state->connection_in = -1;
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close(active_state->connection_out);
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active_state->connection_out = -1;
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- if (backup_state)
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- tmp = backup_state;
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- else
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- tmp = alloc_session_state();
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backup_state = active_state;
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- active_state = tmp;
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+ active_state = alloc_session_state();
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}
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/*
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@@ -1947,9 +1971,7 @@ packet_restore_state(void)
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backup_state = active_state;
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active_state = tmp;
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active_state->connection_in = backup_state->connection_in;
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- backup_state->connection_in = -1;
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active_state->connection_out = backup_state->connection_out;
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- backup_state->connection_out = -1;
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len = buffer_len(&backup_state->input);
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if (len > 0) {
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buf = buffer_ptr(&backup_state->input);
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@@ -1957,4 +1979,10 @@ packet_restore_state(void)
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buffer_clear(&backup_state->input);
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add_recv_bytes(len);
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}
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+ backup_state->connection_in = -1;
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+ backup_state->connection_out = -1;
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+ packet_destroy_state(backup_state);
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+ xfree(backup_state);
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+ backup_state = NULL;
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}
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+
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diff -up openssh-5.8p1/packet.h.audit4 openssh-5.8p1/packet.h
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--- openssh-5.8p1/packet.h.audit4 2010-11-20 05:19:38.000000000 +0100
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+++ openssh-5.8p1/packet.h 2011-02-21 18:38:45.000000000 +0100
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@@ -125,4 +125,5 @@ void packet_restore_state(void);
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void *packet_get_input(void);
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void *packet_get_output(void);
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+void packet_destroy_all(void);
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#endif /* PACKET_H */
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diff -up openssh-5.8p1/sshd.c.audit4 openssh-5.8p1/sshd.c
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--- openssh-5.8p1/sshd.c.audit4 2011-02-21 18:38:45.000000000 +0100
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+++ openssh-5.8p1/sshd.c 2011-02-21 18:38:45.000000000 +0100
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@@ -663,6 +663,8 @@ privsep_preauth(Authctxt *authctxt)
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return (0);
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}
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+extern Newkeys *current_keys[];
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+
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static void
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privsep_postauth(Authctxt *authctxt)
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{
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@@ -688,6 +690,10 @@ privsep_postauth(Authctxt *authctxt)
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verbose("User child is on pid %ld", (long)pmonitor->m_pid);
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close(pmonitor->m_recvfd);
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buffer_clear(&loginmsg);
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+ newkeys_destroy(current_keys[MODE_OUT]);
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+ newkeys_destroy(current_keys[MODE_IN]);
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+ packet_destroy_all();
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+ audit_session_key_free_body(2);
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monitor_child_postauth(pmonitor);
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/* NEVERREACHED */
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@@ -1974,6 +1980,8 @@ main(int ac, char **av)
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*/
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if (use_privsep) {
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mm_send_keystate(pmonitor);
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+ packet_destroy_all();
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+ audit_session_key_free(2);
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exit(0);
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}
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@@ -2026,6 +2034,9 @@ main(int ac, char **av)
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do_authenticated(authctxt);
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/* The connection has been terminated. */
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+ packet_destroy_all();
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+ audit_session_key_free(2);
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+
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packet_get_state(MODE_IN, NULL, NULL, NULL, &ibytes);
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packet_get_state(MODE_OUT, NULL, NULL, NULL, &obytes);
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verbose("Transferred: sent %llu, received %llu bytes",
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