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Code Issues Projects Releases Wiki Activity

Remove tabs introduced from VNC ACL series

Browse Source 
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6727 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-03-06 20:27:40 +00:00
parent 76655d6dec
commit 28a76be8f4
4 changed files with 711 additions and 711 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
acl.c
View File

@ -41,8 +41,8 @@ qemu_acl *qemu_acl_find(const char *aclname)
{
int i;
for (i = 0 ; i < nacls ; i++) {
if (strcmp(acls[i]->aclname, aclname) == 0)
return acls[i];
if (strcmp(acls[i]->aclname, aclname) == 0)
return acls[i];
}
return NULL;
@ -54,7 +54,7 @@ qemu_acl *qemu_acl_init(const char *aclname)
acl = qemu_acl_find(aclname);
if (acl)
return acl;
return acl;
acl = qemu_malloc(sizeof(*acl));
acl->aclname = qemu_strdup(aclname);
@ -74,19 +74,19 @@ qemu_acl *qemu_acl_init(const char *aclname)
}
int qemu_acl_party_is_allowed(qemu_acl *acl,
const char *party)
const char *party)
{
qemu_acl_entry *entry;
TAILQ_FOREACH(entry, &acl->entries, next) {
#ifdef HAVE_FNMATCH_H
if (fnmatch(entry->match, party, 0) == 0)
return entry->deny ? 0 : 1;
if (fnmatch(entry->match, party, 0) == 0)
return entry->deny ? 0 : 1;
#else
/* No fnmatch, so fallback to exact string matching
* instead of allowing wildcards */
if (strcmp(entry->match, party) == 0)
return entry->deny ? 0 : 1;
/* No fnmatch, so fallback to exact string matching
* instead of allowing wildcards */
if (strcmp(entry->match, party) == 0)
return entry->deny ? 0 : 1;
#endif
}
@ -103,17 +103,17 @@ void qemu_acl_reset(qemu_acl *acl)
* access control list */
acl->defaultDeny = 1;
TAILQ_FOREACH(entry, &acl->entries, next) {
TAILQ_REMOVE(&acl->entries, entry, next);
free(entry->match);
free(entry);
TAILQ_REMOVE(&acl->entries, entry, next);
free(entry->match);
free(entry);
}
acl->nentries = 0;
}
int qemu_acl_append(qemu_acl *acl,
int deny,
const char *match)
int deny,
const char *match)
{
qemu_acl_entry *entry;
@ -129,18 +129,18 @@ int qemu_acl_append(qemu_acl *acl,
int qemu_acl_insert(qemu_acl *acl,
int deny,
const char *match,
int index)
int deny,
const char *match,
int index)
{
qemu_acl_entry *entry;
qemu_acl_entry *tmp;
int i = 0;
if (index <= 0)
return -1;
return -1;
if (index >= acl->nentries)
return qemu_acl_append(acl, deny, match);
return qemu_acl_append(acl, deny, match);
entry = qemu_malloc(sizeof(*entry));
@ -148,29 +148,29 @@ int qemu_acl_insert(qemu_acl *acl,
entry->deny = deny;
TAILQ_FOREACH(tmp, &acl->entries, next) {
i++;
if (i == index) {
TAILQ_INSERT_BEFORE(tmp, entry, next);
acl->nentries++;
break;
}
i++;
if (i == index) {
TAILQ_INSERT_BEFORE(tmp, entry, next);
acl->nentries++;
break;
}
}
return i;
}
int qemu_acl_remove(qemu_acl *acl,
const char *match)
const char *match)
{
qemu_acl_entry *entry;
int i = 0;
TAILQ_FOREACH(entry, &acl->entries, next) {
i++;
if (strcmp(entry->match, match) == 0) {
TAILQ_REMOVE(&acl->entries, entry, next);
return i;
}
i++;
if (strcmp(entry->match, match) == 0) {
TAILQ_REMOVE(&acl->entries, entry, next);
return i;
}
}
return -1;
}

162
monitor.c
View File

@ -160,25 +160,25 @@ void monitor_print_filename(Monitor *mon, const char *filename)
int i;
for (i = 0; filename[i]; i++) {
switch (filename[i]) {
case ' ':
case '"':
case '\\':
monitor_printf(mon, "\\%c", filename[i]);
break;
case '\t':
monitor_printf(mon, "\\t");
break;
case '\r':
monitor_printf(mon, "\\r");
break;
case '\n':
monitor_printf(mon, "\\n");
break;
default:
monitor_printf(mon, "%c", filename[i]);
break;
}
switch (filename[i]) {
case ' ':
case '"':
case '\\':
monitor_printf(mon, "\\%c", filename[i]);
break;
case '\t':
monitor_printf(mon, "\\t");
break;
case '\r':
monitor_printf(mon, "\\r");
break;
case '\n':
monitor_printf(mon, "\\n");
break;
default:
monitor_printf(mon, "%c", filename[i]);
break;
}
}
}
@ -474,17 +474,17 @@ static void change_vnc_password_cb(Monitor *mon, const char *password,
static void do_change_vnc(Monitor *mon, const char *target, const char *arg)
{
if (strcmp(target, "passwd") == 0 ||
strcmp(target, "password") == 0) {
if (arg) {
strcmp(target, "password") == 0) {
if (arg) {
char password[9];
strncpy(password, arg, sizeof(password));
password[sizeof(password) - 1] = '\0';
strncpy(password, arg, sizeof(password));
password[sizeof(password) - 1] = '\0';
change_vnc_password_cb(mon, password, NULL);
} else {
monitor_read_password(mon, change_vnc_password_cb, NULL);
}
} else {
if (vnc_display_open(NULL, target) < 0)
if (vnc_display_open(NULL, target) < 0)
monitor_printf(mon, "could not start VNC server on %s\n", target);
}
}
@ -493,9 +493,9 @@ static void do_change(Monitor *mon, const char *device, const char *target,
const char *arg)
{
if (strcmp(device, "vnc") == 0) {
do_change_vnc(mon, target, arg);
do_change_vnc(mon, target, arg);
} else {
do_change_block(mon, device, target, arg);
do_change_block(mon, device, target, arg);
}
}
@ -1535,81 +1535,81 @@ static void do_info_balloon(Monitor *mon)
static void do_acl(Monitor *mon,
const char *command,
const char *aclname,
const char *match,
int has_index,
int index)
const char *aclname,
const char *match,
int has_index,
int index)
{
qemu_acl *acl;
acl = qemu_acl_find(aclname);
if (!acl) {
monitor_printf(mon, "acl: unknown list '%s'\n", aclname);
return;
monitor_printf(mon, "acl: unknown list '%s'\n", aclname);
return;
}
if (strcmp(command, "show") == 0) {
int i = 0;
qemu_acl_entry *entry;
monitor_printf(mon, "policy: %s\n",
int i = 0;
qemu_acl_entry *entry;
monitor_printf(mon, "policy: %s\n",
acl->defaultDeny ? "deny" : "allow");
TAILQ_FOREACH(entry, &acl->entries, next) {
i++;
monitor_printf(mon, "%d: %s %s\n", i,
TAILQ_FOREACH(entry, &acl->entries, next) {
i++;
monitor_printf(mon, "%d: %s %s\n", i,
entry->deny ? "deny" : "allow",
entry->match);
}
}
} else if (strcmp(command, "reset") == 0) {
qemu_acl_reset(acl);
monitor_printf(mon, "acl: removed all rules\n");
qemu_acl_reset(acl);
monitor_printf(mon, "acl: removed all rules\n");
} else if (strcmp(command, "policy") == 0) {
if (!match) {
monitor_printf(mon, "acl: missing policy parameter\n");
return;
}
if (!match) {
monitor_printf(mon, "acl: missing policy parameter\n");
return;
}
if (strcmp(match, "allow") == 0) {
acl->defaultDeny = 0;
monitor_printf(mon, "acl: policy set to 'allow'\n");
} else if (strcmp(match, "deny") == 0) {
acl->defaultDeny = 1;
monitor_printf(mon, "acl: policy set to 'deny'\n");
} else {
monitor_printf(mon, "acl: unknown policy '%s', expected 'deny' or 'allow'\n", match);
}
if (strcmp(match, "allow") == 0) {
acl->defaultDeny = 0;
monitor_printf(mon, "acl: policy set to 'allow'\n");
} else if (strcmp(match, "deny") == 0) {
acl->defaultDeny = 1;
monitor_printf(mon, "acl: policy set to 'deny'\n");
} else {
monitor_printf(mon, "acl: unknown policy '%s', expected 'deny' or 'allow'\n", match);
}
} else if ((strcmp(command, "allow") == 0) ||
(strcmp(command, "deny") == 0)) {
int deny = strcmp(command, "deny") == 0 ? 1 : 0;
int ret;
(strcmp(command, "deny") == 0)) {
int deny = strcmp(command, "deny") == 0 ? 1 : 0;
int ret;
if (!match) {
monitor_printf(mon, "acl: missing match parameter\n");
return;
}
if (!match) {
monitor_printf(mon, "acl: missing match parameter\n");
return;
}
if (has_index)
ret = qemu_acl_insert(acl, deny, match, index);
else
ret = qemu_acl_append(acl, deny, match);
if (ret < 0)
monitor_printf(mon, "acl: unable to add acl entry\n");
else
monitor_printf(mon, "acl: added rule at position %d\n", ret);
if (has_index)
ret = qemu_acl_insert(acl, deny, match, index);
else
ret = qemu_acl_append(acl, deny, match);
if (ret < 0)
monitor_printf(mon, "acl: unable to add acl entry\n");
else
monitor_printf(mon, "acl: added rule at position %d\n", ret);
} else if (strcmp(command, "remove") == 0) {
int ret;
int ret;
if (!match) {
monitor_printf(mon, "acl: missing match parameter\n");
return;
}
if (!match) {
monitor_printf(mon, "acl: missing match parameter\n");
return;
}
ret = qemu_acl_remove(acl, match);
if (ret < 0)
monitor_printf(mon, "acl: no matching acl entry\n");
else
monitor_printf(mon, "acl: removed rule at position %d\n", ret);
ret = qemu_acl_remove(acl, match);
if (ret < 0)
monitor_printf(mon, "acl: no matching acl entry\n");
else
monitor_printf(mon, "acl: removed rule at position %d\n", ret);
} else {
monitor_printf(mon, "acl: unknown command '%s'\n", command);
monitor_printf(mon, "acl: unknown command '%s'\n", command);
}
}
@ -1839,7 +1839,7 @@ static target_long monitor_get_ccr (const struct MonitorDef *md, int val)
u = 0;
for (i = 0; i < 8; i++)
u |= env->crf[i] << (32 - (4 * i));
u |= env->crf[i] << (32 - (4 * i));
return u;
}

470
vnc-auth-sasl.c
View File

@ -31,14 +31,14 @@
void vnc_sasl_client_cleanup(VncState *vs)
{
if (vs->sasl.conn) {
vs->sasl.runSSF = vs->sasl.waitWriteSSF = vs->sasl.wantSSF = 0;
vs->sasl.encodedLength = vs->sasl.encodedOffset = 0;
vs->sasl.encoded = NULL;
free(vs->sasl.username);
free(vs->sasl.mechlist);
vs->sasl.username = vs->sasl.mechlist = NULL;
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
vs->sasl.runSSF = vs->sasl.waitWriteSSF = vs->sasl.wantSSF = 0;
vs->sasl.encodedLength = vs->sasl.encodedOffset = 0;
vs->sasl.encoded = NULL;
free(vs->sasl.username);
free(vs->sasl.mechlist);
vs->sasl.username = vs->sasl.mechlist = NULL;
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
}
}
@ -48,33 +48,33 @@ long vnc_client_write_sasl(VncState *vs)
long ret;
VNC_DEBUG("Write SASL: Pending output %p size %d offset %d Encoded: %p size %d offset %d\n",
vs->output.buffer, vs->output.capacity, vs->output.offset,
vs->sasl.encoded, vs->sasl.encodedLength, vs->sasl.encodedOffset);
vs->output.buffer, vs->output.capacity, vs->output.offset,
vs->sasl.encoded, vs->sasl.encodedLength, vs->sasl.encodedOffset);
if (!vs->sasl.encoded) {
int err;
err = sasl_encode(vs->sasl.conn,
(char *)vs->output.buffer,
vs->output.offset,
(const char **)&vs->sasl.encoded,
&vs->sasl.encodedLength);
if (err != SASL_OK)
return vnc_client_io_error(vs, -1, EIO);
int err;
err = sasl_encode(vs->sasl.conn,
(char *)vs->output.buffer,
vs->output.offset,
(const char **)&vs->sasl.encoded,
&vs->sasl.encodedLength);
if (err != SASL_OK)
return vnc_client_io_error(vs, -1, EIO);
vs->sasl.encodedOffset = 0;
vs->sasl.encodedOffset = 0;
}
ret = vnc_client_write_buf(vs,
vs->sasl.encoded + vs->sasl.encodedOffset,
vs->sasl.encodedLength - vs->sasl.encodedOffset);
vs->sasl.encoded + vs->sasl.encodedOffset,
vs->sasl.encodedLength - vs->sasl.encodedOffset);
if (!ret)
return 0;
return 0;
vs->sasl.encodedOffset += ret;
if (vs->sasl.encodedOffset == vs->sasl.encodedLength) {
vs->output.offset = 0;
vs->sasl.encoded = NULL;
vs->sasl.encodedOffset = vs->sasl.encodedLength = 0;
vs->output.offset = 0;
vs->sasl.encoded = NULL;
vs->sasl.encodedOffset = vs->sasl.encodedLength = 0;
}
/* Can't merge this block with one above, because
@ -83,7 +83,7 @@ long vnc_client_write_sasl(VncState *vs)
* SASL encoded output
*/
if (vs->output.offset == 0) {
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
}
return ret;
@ -100,16 +100,16 @@ long vnc_client_read_sasl(VncState *vs)
ret = vnc_client_read_buf(vs, encoded, sizeof(encoded));
if (!ret)
return 0;
return 0;
err = sasl_decode(vs->sasl.conn,
(char *)encoded, ret,
&decoded, &decodedLen);
(char *)encoded, ret,
&decoded, &decodedLen);
if (err != SASL_OK)
return vnc_client_io_error(vs, -1, -EIO);
return vnc_client_io_error(vs, -1, -EIO);
VNC_DEBUG("Read SASL Encoded %p size %ld Decoded %p size %d\n",
encoded, ret, decoded, decodedLen);
encoded, ret, decoded, decodedLen);
buffer_reserve(&vs->input, decodedLen);
buffer_append(&vs->input, decoded, decodedLen);
return decodedLen;
@ -124,27 +124,27 @@ static int vnc_auth_sasl_check_access(VncState *vs)
err = sasl_getprop(vs->sasl.conn, SASL_USERNAME, &val);
if (err != SASL_OK) {
VNC_DEBUG("cannot query SASL username on connection %d (%s), denying access\n",
err, sasl_errstring(err, NULL, NULL));
return -1;
VNC_DEBUG("cannot query SASL username on connection %d (%s), denying access\n",
err, sasl_errstring(err, NULL, NULL));
return -1;
}
if (val == NULL) {
VNC_DEBUG("no client username was found, denying access\n");
return -1;
VNC_DEBUG("no client username was found, denying access\n");
return -1;
}
VNC_DEBUG("SASL client username %s\n", (const char *)val);
vs->sasl.username = qemu_strdup((const char*)val);
if (vs->vd->sasl.acl == NULL) {
VNC_DEBUG("no ACL activated, allowing access\n");
return 0;
VNC_DEBUG("no ACL activated, allowing access\n");
return 0;
}
allow = qemu_acl_party_is_allowed(vs->vd->sasl.acl, vs->sasl.username);
VNC_DEBUG("SASL client %s %s by ACL\n", vs->sasl.username,
allow ? "allowed" : "denied");
allow ? "allowed" : "denied");
return allow ? 0 : -1;
}
@ -154,16 +154,16 @@ static int vnc_auth_sasl_check_ssf(VncState *vs)
int err, ssf;
if (!vs->sasl.wantSSF)
return 1;
return 1;
err = sasl_getprop(vs->sasl.conn, SASL_SSF, &val);
if (err != SASL_OK)
return 0;
return 0;
ssf = *(const int *)val;
VNC_DEBUG("negotiated an SSF of %d\n", ssf);
if (ssf < 56)
return 0; /* 56 is good for Kerberos */
return 0; /* 56 is good for Kerberos */
/* Only setup for read initially, because we're about to send an RPC
* reply which must be in plain text. When the next incoming RPC
@ -204,73 +204,73 @@ static int protocol_client_auth_sasl_step(VncState *vs, uint8_t *data, size_t le
/* NB, distinction of NULL vs "" is *critical* in SASL */
if (datalen) {
clientdata = (char*)data;
clientdata[datalen-1] = '\0'; /* Wire includes '\0', but make sure */
datalen--; /* Don't count NULL byte when passing to _start() */
clientdata = (char*)data;
clientdata[datalen-1] = '\0'; /* Wire includes '\0', but make sure */
datalen--; /* Don't count NULL byte when passing to _start() */
}
VNC_DEBUG("Step using SASL Data %p (%d bytes)\n",
clientdata, datalen);
clientdata, datalen);
err = sasl_server_step(vs->sasl.conn,
clientdata,
datalen,
&serverout,
&serveroutlen);
clientdata,
datalen,
&serverout,
&serveroutlen);
if (err != SASL_OK &&
err != SASL_CONTINUE) {
VNC_DEBUG("sasl step failed %d (%s)\n",
err, sasl_errdetail(vs->sasl.conn));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
err != SASL_CONTINUE) {
VNC_DEBUG("sasl step failed %d (%s)\n",
err, sasl_errdetail(vs->sasl.conn));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
if (serveroutlen > SASL_DATA_MAX_LEN) {
VNC_DEBUG("sasl step reply data too long %d\n",
serveroutlen);
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
VNC_DEBUG("sasl step reply data too long %d\n",
serveroutlen);
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
VNC_DEBUG("SASL return data %d bytes, nil; %d\n",
serveroutlen, serverout ? 0 : 1);
serveroutlen, serverout ? 0 : 1);
if (serveroutlen) {
vnc_write_u32(vs, serveroutlen + 1);
vnc_write(vs, serverout, serveroutlen + 1);
vnc_write_u32(vs, serveroutlen + 1);
vnc_write(vs, serverout, serveroutlen + 1);
} else {
vnc_write_u32(vs, 0);
vnc_write_u32(vs, 0);
}
/* Whether auth is complete */
vnc_write_u8(vs, err == SASL_CONTINUE ? 0 : 1);
if (err == SASL_CONTINUE) {
VNC_DEBUG("%s", "Authentication must continue\n");
/* Wait for step length */
vnc_read_when(vs, protocol_client_auth_sasl_step_len, 4);
VNC_DEBUG("%s", "Authentication must continue\n");
/* Wait for step length */
vnc_read_when(vs, protocol_client_auth_sasl_step_len, 4);
} else {
if (!vnc_auth_sasl_check_ssf(vs)) {
VNC_DEBUG("Authentication rejected for weak SSF %d\n", vs->csock);
goto authreject;
}
if (!vnc_auth_sasl_check_ssf(vs)) {
VNC_DEBUG("Authentication rejected for weak SSF %d\n", vs->csock);
goto authreject;
}
/* Check username whitelist ACL */
if (vnc_auth_sasl_check_access(vs) < 0) {
VNC_DEBUG("Authentication rejected for ACL %d\n", vs->csock);
goto authreject;
}
/* Check username whitelist ACL */
if (vnc_auth_sasl_check_access(vs) < 0) {
VNC_DEBUG("Authentication rejected for ACL %d\n", vs->csock);
goto authreject;
}
VNC_DEBUG("Authentication successful %d\n", vs->csock);
vnc_write_u32(vs, 0); /* Accept auth */
/*
* Delay writing in SSF encoded mode until pending output
* buffer is written
*/
if (vs->sasl.runSSF)
vs->sasl.waitWriteSSF = vs->output.offset;
start_client_init(vs);
VNC_DEBUG("Authentication successful %d\n", vs->csock);
vnc_write_u32(vs, 0); /* Accept auth */
/*
* Delay writing in SSF encoded mode until pending output
* buffer is written
*/
if (vs->sasl.runSSF)
vs->sasl.waitWriteSSF = vs->output.offset;
start_client_init(vs);
}
return 0;
@ -293,15 +293,15 @@ static int protocol_client_auth_sasl_step_len(VncState *vs, uint8_t *data, size_
uint32_t steplen = read_u32(data, 0);
VNC_DEBUG("Got client step len %d\n", steplen);
if (steplen > SASL_DATA_MAX_LEN) {
VNC_DEBUG("Too much SASL data %d\n", steplen);
vnc_client_error(vs);
return -1;
VNC_DEBUG("Too much SASL data %d\n", steplen);
vnc_client_error(vs);
return -1;
}
if (steplen == 0)
return protocol_client_auth_sasl_step(vs, NULL, 0);
return protocol_client_auth_sasl_step(vs, NULL, 0);
else
vnc_read_when(vs, protocol_client_auth_sasl_step, steplen);
vnc_read_when(vs, protocol_client_auth_sasl_step, steplen);
return 0;
}
@ -332,67 +332,67 @@ static int protocol_client_auth_sasl_start(VncState *vs, uint8_t *data, size_t l
/* NB, distinction of NULL vs "" is *critical* in SASL */
if (datalen) {
clientdata = (char*)data;
clientdata[datalen-1] = '\0'; /* Should be on wire, but make sure */
datalen--; /* Don't count NULL byte when passing to _start() */
clientdata = (char*)data;
clientdata[datalen-1] = '\0'; /* Should be on wire, but make sure */
datalen--; /* Don't count NULL byte when passing to _start() */
}
VNC_DEBUG("Start SASL auth with mechanism %s. Data %p (%d bytes)\n",
vs->sasl.mechlist, clientdata, datalen);
vs->sasl.mechlist, clientdata, datalen);
err = sasl_server_start(vs->sasl.conn,
vs->sasl.mechlist,
clientdata,
datalen,
&serverout,
&serveroutlen);
vs->sasl.mechlist,
clientdata,
datalen,
&serverout,
&serveroutlen);
if (err != SASL_OK &&
err != SASL_CONTINUE) {
VNC_DEBUG("sasl start failed %d (%s)\n",
err, sasl_errdetail(vs->sasl.conn));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
err != SASL_CONTINUE) {
VNC_DEBUG("sasl start failed %d (%s)\n",
err, sasl_errdetail(vs->sasl.conn));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
if (serveroutlen > SASL_DATA_MAX_LEN) {
VNC_DEBUG("sasl start reply data too long %d\n",
serveroutlen);
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
VNC_DEBUG("sasl start reply data too long %d\n",
serveroutlen);
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
VNC_DEBUG("SASL return data %d bytes, nil; %d\n",
serveroutlen, serverout ? 0 : 1);
serveroutlen, serverout ? 0 : 1);
if (serveroutlen) {
vnc_write_u32(vs, serveroutlen + 1);
vnc_write(vs, serverout, serveroutlen + 1);
vnc_write_u32(vs, serveroutlen + 1);
vnc_write(vs, serverout, serveroutlen + 1);
} else {
vnc_write_u32(vs, 0);
vnc_write_u32(vs, 0);
}
/* Whether auth is complete */
vnc_write_u8(vs, err == SASL_CONTINUE ? 0 : 1);
if (err == SASL_CONTINUE) {
VNC_DEBUG("%s", "Authentication must continue\n");
/* Wait for step length */
vnc_read_when(vs, protocol_client_auth_sasl_step_len, 4);
VNC_DEBUG("%s", "Authentication must continue\n");
/* Wait for step length */
vnc_read_when(vs, protocol_client_auth_sasl_step_len, 4);
} else {
if (!vnc_auth_sasl_check_ssf(vs)) {
VNC_DEBUG("Authentication rejected for weak SSF %d\n", vs->csock);
goto authreject;
}
if (!vnc_auth_sasl_check_ssf(vs)) {
VNC_DEBUG("Authentication rejected for weak SSF %d\n", vs->csock);
goto authreject;
}
/* Check username whitelist ACL */
if (vnc_auth_sasl_check_access(vs) < 0) {
VNC_DEBUG("Authentication rejected for ACL %d\n", vs->csock);
goto authreject;
}
/* Check username whitelist ACL */
if (vnc_auth_sasl_check_access(vs) < 0) {
VNC_DEBUG("Authentication rejected for ACL %d\n", vs->csock);
goto authreject;
}
VNC_DEBUG("Authentication successful %d\n", vs->csock);
vnc_write_u32(vs, 0); /* Accept auth */
start_client_init(vs);
VNC_DEBUG("Authentication successful %d\n", vs->csock);
vnc_write_u32(vs, 0); /* Accept auth */
start_client_init(vs);
}
return 0;
@ -415,13 +415,13 @@ static int protocol_client_auth_sasl_start_len(VncState *vs, uint8_t *data, size
uint32_t startlen = read_u32(data, 0);
VNC_DEBUG("Got client start len %d\n", startlen);
if (startlen > SASL_DATA_MAX_LEN) {
VNC_DEBUG("Too much SASL data %d\n", startlen);
vnc_client_error(vs);
return -1;
VNC_DEBUG("Too much SASL data %d\n", startlen);
vnc_client_error(vs);
return -1;
}
if (startlen == 0)
return protocol_client_auth_sasl_start(vs, NULL, 0);
return protocol_client_auth_sasl_start(vs, NULL, 0);
vnc_read_when(vs, protocol_client_auth_sasl_start, startlen);
return 0;
@ -431,35 +431,35 @@ static int protocol_client_auth_sasl_mechname(VncState *vs, uint8_t *data, size_
{
char *mechname = malloc(len + 1);
if (!mechname) {
VNC_DEBUG("Out of memory reading mechname\n");
vnc_client_error(vs);
VNC_DEBUG("Out of memory reading mechname\n");
vnc_client_error(vs);
}
strncpy(mechname, (char*)data, len);
mechname[len] = '\0';
VNC_DEBUG("Got client mechname '%s' check against '%s'\n",
mechname, vs->sasl.mechlist);
mechname, vs->sasl.mechlist);
if (strncmp(vs->sasl.mechlist, mechname, len) == 0) {
if (vs->sasl.mechlist[len] != '\0' &&
vs->sasl.mechlist[len] != ',') {
VNC_DEBUG("One %d", vs->sasl.mechlist[len]);
vnc_client_error(vs);
return -1;
}
if (vs->sasl.mechlist[len] != '\0' &&
vs->sasl.mechlist[len] != ',') {
VNC_DEBUG("One %d", vs->sasl.mechlist[len]);
vnc_client_error(vs);
return -1;
}
} else {
char *offset = strstr(vs->sasl.mechlist, mechname);
VNC_DEBUG("Two %p\n", offset);
if (!offset) {
vnc_client_error(vs);
return -1;
}
VNC_DEBUG("Two '%s'\n", offset);
if (offset[-1] != ',' ||
(offset[len] != '\0'&&
offset[len] != ',')) {
vnc_client_error(vs);
return -1;
}
char *offset = strstr(vs->sasl.mechlist, mechname);
VNC_DEBUG("Two %p\n", offset);
if (!offset) {
vnc_client_error(vs);
return -1;
}
VNC_DEBUG("Two '%s'\n", offset);
if (offset[-1] != ',' ||
(offset[len] != '\0'&&
offset[len] != ',')) {
vnc_client_error(vs);
return -1;
}
}
free(vs->sasl.mechlist);
@ -475,20 +475,20 @@ static int protocol_client_auth_sasl_mechname_len(VncState *vs, uint8_t *data, s
uint32_t mechlen = read_u32(data, 0);
VNC_DEBUG("Got client mechname len %d\n", mechlen);
if (mechlen > 100) {
VNC_DEBUG("Too long SASL mechname data %d\n", mechlen);
vnc_client_error(vs);
return -1;
VNC_DEBUG("Too long SASL mechname data %d\n", mechlen);
vnc_client_error(vs);
return -1;
}
if (mechlen < 1) {
VNC_DEBUG("Too short SASL mechname %d\n", mechlen);
vnc_client_error(vs);
return -1;
VNC_DEBUG("Too short SASL mechname %d\n", mechlen);
vnc_client_error(vs);
return -1;
}
vnc_read_when(vs, protocol_client_auth_sasl_mechname,mechlen);
return 0;
}
#define USES_X509_AUTH(vs) \
#define USES_X509_AUTH(vs) \
((vs)->subauth == VNC_AUTH_VENCRYPT_X509NONE || \
(vs)->subauth == VNC_AUTH_VENCRYPT_X509VNC || \
(vs)->subauth == VNC_AUTH_VENCRYPT_X509PLAIN || \
@ -507,116 +507,116 @@ void start_auth_sasl(VncState *vs)
/* Get local & remote client addresses in form IPADDR;PORT */
if (!(localAddr = vnc_socket_local_addr("%s;%s", vs->csock)))
goto authabort;
goto authabort;
if (!(remoteAddr = vnc_socket_remote_addr("%s;%s", vs->csock))) {
free(localAddr);
goto authabort;
free(localAddr);
goto authabort;
}
err = sasl_server_new("vnc",
NULL, /* FQDN - just delegates to gethostname */
NULL, /* User realm */
localAddr,
remoteAddr,
NULL, /* Callbacks, not needed */
SASL_SUCCESS_DATA,
&vs->sasl.conn);
NULL, /* FQDN - just delegates to gethostname */
NULL, /* User realm */
localAddr,
remoteAddr,
NULL, /* Callbacks, not needed */
SASL_SUCCESS_DATA,
&vs->sasl.conn);
free(localAddr);
free(remoteAddr);
localAddr = remoteAddr = NULL;
if (err != SASL_OK) {
VNC_DEBUG("sasl context setup failed %d (%s)",
err, sasl_errstring(err, NULL, NULL));
vs->sasl.conn = NULL;
goto authabort;
VNC_DEBUG("sasl context setup failed %d (%s)",
err, sasl_errstring(err, NULL, NULL));
vs->sasl.conn = NULL;
goto authabort;
}
#ifdef CONFIG_VNC_TLS
/* Inform SASL that we've got an external SSF layer from TLS/x509 */
if (vs->vd->auth == VNC_AUTH_VENCRYPT &&
vs->vd->subauth == VNC_AUTH_VENCRYPT_X509SASL) {
gnutls_cipher_algorithm_t cipher;
sasl_ssf_t ssf;
vs->vd->subauth == VNC_AUTH_VENCRYPT_X509SASL) {
gnutls_cipher_algorithm_t cipher;
sasl_ssf_t ssf;
cipher = gnutls_cipher_get(vs->tls.session);
if (!(ssf = (sasl_ssf_t)gnutls_cipher_get_key_size(cipher))) {
VNC_DEBUG("%s", "cannot TLS get cipher size\n");
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
ssf *= 8; /* tls key size is bytes, sasl wants bits */
cipher = gnutls_cipher_get(vs->tls.session);
if (!(ssf = (sasl_ssf_t)gnutls_cipher_get_key_size(cipher))) {
VNC_DEBUG("%s", "cannot TLS get cipher size\n");
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
ssf *= 8; /* tls key size is bytes, sasl wants bits */
err = sasl_setprop(vs->sasl.conn, SASL_SSF_EXTERNAL, &ssf);
if (err != SASL_OK) {
VNC_DEBUG("cannot set SASL external SSF %d (%s)\n",
err, sasl_errstring(err, NULL, NULL));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
err = sasl_setprop(vs->sasl.conn, SASL_SSF_EXTERNAL, &ssf);
if (err != SASL_OK) {
VNC_DEBUG("cannot set SASL external SSF %d (%s)\n",
err, sasl_errstring(err, NULL, NULL));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
} else
#endif /* CONFIG_VNC_TLS */
vs->sasl.wantSSF = 1;
vs->sasl.wantSSF = 1;
memset (&secprops, 0, sizeof secprops);
/* Inform SASL that we've got an external SSF layer from TLS */
if (strncmp(vs->vd->display, "unix:", 5) == 0
#ifdef CONFIG_VNC_TLS
/* Disable SSF, if using TLS+x509+SASL only. TLS without x509
is not sufficiently strong */
|| (vs->vd->auth == VNC_AUTH_VENCRYPT &&
vs->vd->subauth == VNC_AUTH_VENCRYPT_X509SASL)
/* Disable SSF, if using TLS+x509+SASL only. TLS without x509
is not sufficiently strong */
|| (vs->vd->auth == VNC_AUTH_VENCRYPT &&
vs->vd->subauth == VNC_AUTH_VENCRYPT_X509SASL)
#endif /* CONFIG_VNC_TLS */
) {
/* If we've got TLS or UNIX domain sock, we don't care about SSF */
secprops.min_ssf = 0;
secprops.max_ssf = 0;
secprops.maxbufsize = 8192;
secprops.security_flags = 0;
) {
/* If we've got TLS or UNIX domain sock, we don't care about SSF */
secprops.min_ssf = 0;
secprops.max_ssf = 0;
secprops.maxbufsize = 8192;
secprops.security_flags = 0;
} else {
/* Plain TCP, better get an SSF layer */
secprops.min_ssf = 56; /* Good enough to require kerberos */
secprops.max_ssf = 100000; /* Arbitrary big number */
secprops.maxbufsize = 8192;
/* Forbid any anonymous or trivially crackable auth */
secprops.security_flags =
SASL_SEC_NOANONYMOUS | SASL_SEC_NOPLAINTEXT;
/* Plain TCP, better get an SSF layer */
secprops.min_ssf = 56; /* Good enough to require kerberos */
secprops.max_ssf = 100000; /* Arbitrary big number */
secprops.maxbufsize = 8192;
/* Forbid any anonymous or trivially crackable auth */
secprops.security_flags =
SASL_SEC_NOANONYMOUS | SASL_SEC_NOPLAINTEXT;
}
err = sasl_setprop(vs->sasl.conn, SASL_SEC_PROPS, &secprops);
if (err != SASL_OK) {
VNC_DEBUG("cannot set SASL security props %d (%s)\n",
err, sasl_errstring(err, NULL, NULL));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
VNC_DEBUG("cannot set SASL security props %d (%s)\n",
err, sasl_errstring(err, NULL, NULL));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
err = sasl_listmech(vs->sasl.conn,
NULL, /* Don't need to set user */
"", /* Prefix */
",", /* Separator */
"", /* Suffix */
&mechlist,
NULL,
NULL);
NULL, /* Don't need to set user */
"", /* Prefix */
",", /* Separator */
"", /* Suffix */
&mechlist,
NULL,
NULL);
if (err != SASL_OK) {
VNC_DEBUG("cannot list SASL mechanisms %d (%s)\n",
err, sasl_errdetail(vs->sasl.conn));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
VNC_DEBUG("cannot list SASL mechanisms %d (%s)\n",
err, sasl_errdetail(vs->sasl.conn));
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
VNC_DEBUG("Available mechanisms for client: '%s'\n", mechlist);
if (!(vs->sasl.mechlist = strdup(mechlist))) {
VNC_DEBUG("Out of memory");
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
VNC_DEBUG("Out of memory");
sasl_dispose(&vs->sasl.conn);
vs->sasl.conn = NULL;
goto authabort;
}
mechlistlen = strlen(mechlist);
vnc_write_u32(vs, mechlistlen);

726
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