зеркало из https://github.com/Azure/sonic-openssh.git
upstream commit
swith auth-options to new sshbuf/sshkey; ok djm@
This commit is contained in:
markus@openbsd.org
Damien Miller
Родитель
540e891191
Коммит
ae8b463217
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@ -1,4 +1,4 @@
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/* $OpenBSD: auth-options.c,v 1.64 2014/07/15 15:54:14 millert Exp $ */
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/* $OpenBSD: auth-options.c,v 1.65 2015/01/14 10:30:34 markus Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -21,15 +21,19 @@
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#include <stdarg.h>
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#include "openbsd-compat/sys-queue.h"
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#include "key.h" /* XXX for typedef */
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#include "buffer.h" /* XXX for typedef */
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#include "xmalloc.h"
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#include "match.h"
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#include "ssherr.h"
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#include "log.h"
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#include "canohost.h"
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#include "buffer.h"
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#include "sshbuf.h"
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#include "misc.h"
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#include "channels.h"
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#include "servconf.h"
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#include "key.h"
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#include "sshkey.h"
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#include "auth-options.h"
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#include "hostfile.h"
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#include "auth.h"
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@ -417,7 +421,7 @@ bad_option:
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#define OPTIONS_CRITICAL 1
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#define OPTIONS_EXTENSIONS 2
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static int
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parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw,
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parse_option_list(struct sshbuf *oblob, struct passwd *pw,
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u_int which, int crit,
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int *cert_no_port_forwarding_flag,
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int *cert_no_agent_forwarding_flag,
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@ -430,26 +434,25 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw,
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char *command, *allowed;
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const char *remote_ip;
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char *name = NULL;
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u_char *data_blob = NULL;
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u_int nlen, dlen, clen;
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Buffer c, data;
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int ret = -1, result, found;
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struct sshbuf *c = NULL, *data = NULL;
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int r, ret = -1, result, found;
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buffer_init(&data);
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if ((c = sshbuf_fromb(oblob)) == NULL) {
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error("%s: sshbuf_fromb failed", __func__);
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goto out;
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}
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/* Make copy to avoid altering original */
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buffer_init(&c);
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buffer_append(&c, optblob, optblob_len);
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while (buffer_len(&c) > 0) {
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if ((name = buffer_get_cstring_ret(&c, &nlen)) == NULL ||
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(data_blob = buffer_get_string_ret(&c, &dlen)) == NULL) {
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error("Certificate options corrupt");
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while (sshbuf_len(c) > 0) {
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sshbuf_free(data);
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data = NULL;
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if ((r = sshbuf_get_cstring(c, &name, NULL)) != 0 ||
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(r = sshbuf_froms(c, &data)) != 0) {
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error("Unable to parse certificate options: %s",
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ssh_err(r));
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goto out;
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}
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buffer_append(&data, data_blob, dlen);
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debug3("found certificate option \"%.100s\" len %u",
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name, dlen);
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debug3("found certificate option \"%.100s\" len %zu",
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name, sshbuf_len(data));
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found = 0;
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if ((which & OPTIONS_EXTENSIONS) != 0) {
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if (strcmp(name, "permit-X11-forwarding") == 0) {
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@ -473,10 +476,10 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw,
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}
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if (!found && (which & OPTIONS_CRITICAL) != 0) {
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if (strcmp(name, "force-command") == 0) {
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if ((command = buffer_get_cstring_ret(&data,
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&clen)) == NULL) {
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error("Certificate constraint \"%s\" "
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"corrupt", name);
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if ((r = sshbuf_get_cstring(data, &command,
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NULL)) != 0) {
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error("Unable to parse \"%s\" "
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"section: %s", name, ssh_err(r));
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goto out;
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}
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if (*cert_forced_command != NULL) {
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@ -489,10 +492,10 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw,
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found = 1;
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}
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if (strcmp(name, "source-address") == 0) {
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if ((allowed = buffer_get_cstring_ret(&data,
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&clen)) == NULL) {
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error("Certificate constraint "
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"\"%s\" corrupt", name);
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if ((r = sshbuf_get_cstring(data, &allowed,
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NULL)) != 0) {
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error("Unable to parse \"%s\" "
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"section: %s", name, ssh_err(r));
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goto out;
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}
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if ((*cert_source_address_done)++) {
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@ -540,16 +543,13 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw,
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logit("Certificate extension \"%s\" "
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"is not supported", name);
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}
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} else if (buffer_len(&data) != 0) {
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} else if (sshbuf_len(data) != 0) {
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error("Certificate option \"%s\" corrupt "
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"(extra data)", name);
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goto out;
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}
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buffer_clear(&data);
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free(name);
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free(data_blob);
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name = NULL;
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data_blob = NULL;
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}
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/* successfully parsed all options */
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ret = 0;
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@ -563,10 +563,8 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw,
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}
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if (name != NULL)
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free(name);
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if (data_blob != NULL)
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free(data_blob);
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buffer_free(&data);
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buffer_free(&c);
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sshbuf_free(data);
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sshbuf_free(c);
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return ret;
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}
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@ -575,7 +573,7 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw,
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* options so this must be called after auth_parse_options().
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*/
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int
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auth_cert_options(Key *k, struct passwd *pw)
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auth_cert_options(struct sshkey *k, struct passwd *pw)
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{
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int cert_no_port_forwarding_flag = 1;
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int cert_no_agent_forwarding_flag = 1;
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@ -585,10 +583,9 @@ auth_cert_options(Key *k, struct passwd *pw)
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char *cert_forced_command = NULL;
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int cert_source_address_done = 0;
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if (key_cert_is_legacy(k)) {
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if (sshkey_cert_is_legacy(k)) {
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/* All options are in the one field for v00 certs */
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if (parse_option_list(buffer_ptr(k->cert->critical),
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buffer_len(k->cert->critical), pw,
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if (parse_option_list(k->cert->critical, pw,
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OPTIONS_CRITICAL|OPTIONS_EXTENSIONS, 1,
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&cert_no_port_forwarding_flag,
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&cert_no_agent_forwarding_flag,
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@ -600,14 +597,12 @@ auth_cert_options(Key *k, struct passwd *pw)
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return -1;
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} else {
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/* Separate options and extensions for v01 certs */
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if (parse_option_list(buffer_ptr(k->cert->critical),
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buffer_len(k->cert->critical), pw,
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if (parse_option_list(k->cert->critical, pw,
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OPTIONS_CRITICAL, 1, NULL, NULL, NULL, NULL, NULL,
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&cert_forced_command,
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&cert_source_address_done) == -1)
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return -1;
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if (parse_option_list(buffer_ptr(k->cert->extensions),
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buffer_len(k->cert->extensions), pw,
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if (parse_option_list(k->cert->extensions, pw,
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OPTIONS_EXTENSIONS, 1,
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&cert_no_port_forwarding_flag,
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&cert_no_agent_forwarding_flag,
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@ -1,4 +1,4 @@
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/* $OpenBSD: auth-options.h,v 1.20 2010/05/07 11:30:29 djm Exp $ */
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/* $OpenBSD: auth-options.h,v 1.21 2015/01/14 10:30:34 markus Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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@ -35,6 +35,6 @@ extern char *authorized_principals;
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int auth_parse_options(struct passwd *, char *, char *, u_long);
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void auth_clear_options(void);
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int auth_cert_options(Key *, struct passwd *);
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int auth_cert_options(struct sshkey *, struct passwd *);
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#endif
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