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-rw-r--r--source3/nsswitch/pam_winbind.c107
-rw-r--r--source3/nsswitch/pam_winbind.h6
2 files changed, 56 insertions, 57 deletions
diff --git a/source3/nsswitch/pam_winbind.c b/source3/nsswitch/pam_winbind.c
index beb0d47baa..cdb30edad4 100644
--- a/source3/nsswitch/pam_winbind.c
+++ b/source3/nsswitch/pam_winbind.c
@@ -452,13 +452,17 @@ config_from_pam:
return ctrl;
};
-static void _pam_winbind_free_context(struct pwb_context *ctx)
+static int _pam_winbind_free_context(struct pwb_context *ctx)
{
+ if (!ctx) {
+ return 0;
+ }
+
if (ctx->dict) {
iniparser_freedict(ctx->dict);
}
- SAFE_FREE(ctx);
+ return 0;
}
static int _pam_winbind_init_context(pam_handle_t *pamh,
@@ -469,12 +473,12 @@ static int _pam_winbind_init_context(pam_handle_t *pamh,
{
struct pwb_context *r = NULL;
- r = (struct pwb_context *)malloc(sizeof(struct pwb_context));
+ r = TALLOC_ZERO_P(NULL, struct pwb_context);
if (!r) {
return PAM_BUF_ERR;
}
- ZERO_STRUCTP(r);
+ talloc_set_destructor(r, _pam_winbind_free_context);
r->pamh = pamh;
r->flags = flags;
@@ -482,7 +486,7 @@ static int _pam_winbind_init_context(pam_handle_t *pamh,
r->argv = argv;
r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
if (r->ctrl == -1) {
- _pam_winbind_free_context(r);
+ TALLOC_FREE(r);
return PAM_SYSTEM_ERR;
}
@@ -502,7 +506,7 @@ static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
"(error_status = %d)", pamh, data,
error_status);
}
- SAFE_FREE(data);
+ TALLOC_FREE(data);
}
@@ -1104,14 +1108,13 @@ static void _pam_set_data_string(struct pwb_context *ctx,
return;
}
- ret = pam_set_data(ctx->pamh, data_name, (void *)strdup(value),
+ ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
_pam_winbind_cleanup_func);
if (ret) {
_pam_log_debug(ctx, LOG_DEBUG,
"Could not set data %s: %s\n",
data_name, pam_strerror(ctx->pamh, ret));
}
-
}
/**
@@ -1224,69 +1227,59 @@ static void _pam_warn_krb5_failure(struct pwb_context *ctx,
* @return string (caller needs to free).
*/
-static char *_pam_compose_pwd_restriction_string(struct winbindd_response *response)
+static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
+ struct winbindd_response *response)
{
char *str = NULL;
- size_t offset = 0, ret = 0, str_size = 1024;
- str = (char *)malloc(str_size);
+ str = talloc_asprintf(ctx, "Your password ");
if (!str) {
- return NULL;
- }
-
- memset(str, '\0', str_size);
-
- offset = snprintf(str, str_size, "Your password ");
- if (offset == -1) {
goto failed;
}
if (response->data.auth.policy.min_length_password > 0) {
- ret = snprintf(str+offset, str_size-offset,
+ str = talloc_asprintf_append(str,
"must be at least %d characters; ",
response->data.auth.policy.min_length_password);
- if (ret == -1) {
+ if (!str) {
goto failed;
}
- offset += ret;
}
if (response->data.auth.policy.password_history > 0) {
- ret = snprintf(str+offset, str_size-offset,
+ str = talloc_asprintf_append(str,
"cannot repeat any of your previous %d "
"passwords; ",
response->data.auth.policy.password_history);
- if (ret == -1) {
+ if (!str) {
goto failed;
}
- offset += ret;
}
if (response->data.auth.policy.password_properties &
DOMAIN_PASSWORD_COMPLEX) {
- ret = snprintf(str+offset, str_size-offset,
+ str = talloc_asprintf_append(str,
"must contain capitals, numerals "
"or punctuation; "
"and cannot contain your account "
"or full name; ");
- if (ret == -1) {
+ if (!str) {
goto failed;
}
- offset += ret;
}
- ret = snprintf(str+offset, str_size-offset,
+ str = talloc_asprintf_append(str,
"Please type a different password. "
"Type a password which meets these requirements in "
"both text boxes.");
- if (ret == -1) {
+ if (!str) {
goto failed;
}
return str;
failed:
- SAFE_FREE(str);
+ TALLOC_FREE(str);
return NULL;
}
@@ -1590,11 +1583,11 @@ static int winbind_chauthtok_request(struct pwb_context *ctx,
}
pwd_restriction_string =
- _pam_compose_pwd_restriction_string(&response);
+ _pam_compose_pwd_restriction_string(ctx, &response);
if (pwd_restriction_string) {
_make_remark(ctx, PAM_ERROR_MSG,
pwd_restriction_string);
- SAFE_FREE(pwd_restriction_string);
+ TALLOC_FREE(pwd_restriction_string);
}
}
@@ -1846,12 +1839,13 @@ static const char *get_conf_item_string(struct pwb_context *ctx,
if (ctx->dict) {
char *key = NULL;
- if (!asprintf(&key, "global:%s", item)) {
+ key = talloc_asprintf(ctx, "global:%s", item);
+ if (!key) {
goto out;
}
parm_opt = iniparser_getstr(ctx->dict, key);
- SAFE_FREE(key);
+ TALLOC_FREE(key);
_pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
item, parm_opt);
@@ -1893,12 +1887,13 @@ static int get_config_item_int(struct pwb_context *ctx,
if (ctx->dict) {
char *key = NULL;
- if (!asprintf(&key, "global:%s", item)) {
+ key = talloc_asprintf(ctx, "global:%s", item);
+ if (!key) {
goto out;
}
parm_opt = iniparser_getint(ctx->dict, key, -1);
- SAFE_FREE(key);
+ TALLOC_FREE(key);
_pam_log_debug(ctx, LOG_INFO,
"CONFIG file: %s '%d'\n",
@@ -1977,8 +1972,6 @@ static char* winbind_upn_to_username(struct pwb_context *ctx,
struct winbindd_request req;
struct winbindd_response resp;
int retval;
- char *account_name;
- int account_name_len;
char sep;
/* This cannot work when the winbind separator = @ */
@@ -2014,11 +2007,9 @@ static char* winbind_upn_to_username(struct pwb_context *ctx,
return NULL;
}
- account_name_len = asprintf(&account_name, "%s\\%s",
- resp.data.name.dom_name,
- resp.data.name.name);
-
- return account_name;
+ return talloc_asprintf(ctx, "%s\\%s",
+ resp.data.name.dom_name,
+ resp.data.name.name);
}
PAM_EXTERN
@@ -2087,7 +2078,7 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
real_username);
if (samaccountname) {
free(real_username);
- real_username = samaccountname;
+ real_username = strdup(samaccountname);
}
}
@@ -2127,7 +2118,8 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
char *new_authtok_required_during_auth = NULL;
- if (!asprintf(&new_authtok_required, "%d", retval)) {
+ new_authtok_required = talloc_asprintf(NULL, "%d", retval);
+ if (!new_authtok_required) {
retval = PAM_BUF_ERR;
goto out;
}
@@ -2138,7 +2130,8 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
retval = PAM_SUCCESS;
- if (!asprintf(&new_authtok_required_during_auth, "%d", true)) {
+ new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
+ if (!new_authtok_required_during_auth) {
retval = PAM_BUF_ERR;
goto out;
}
@@ -2172,7 +2165,7 @@ out:
_PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
- _pam_winbind_free_context(ctx);
+ TALLOC_FREE(ctx);
return retval;
}
@@ -2220,7 +2213,7 @@ int pam_sm_setcred(pam_handle_t *pamh, int flags,
_PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
- _pam_winbind_free_context(ctx);
+ TALLOC_FREE(ctx);
return ret;
}
@@ -2321,7 +2314,7 @@ int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
_PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
- _pam_winbind_free_context(ctx);
+ TALLOC_FREE(ctx);
return ret;
}
@@ -2345,7 +2338,7 @@ int pam_sm_open_session(pam_handle_t *pamh, int flags,
out:
_PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
- _pam_winbind_free_context(ctx);
+ TALLOC_FREE(ctx);
return ret;
}
@@ -2431,7 +2424,7 @@ out:
_PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, retval);
- _pam_winbind_free_context(ctx);
+ TALLOC_FREE(ctx);
return retval;
}
@@ -2560,16 +2553,15 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
time_t pwdlastset_prelim = 0;
/* instruct user what is happening */
-#define greeting "Changing password for "
- Announce = (char *) malloc(sizeof(greeting) + strlen(user));
- if (Announce == NULL) {
+
+#define greeting "Changing password for"
+ Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
+ if (!Announce) {
_pam_log(ctx, LOG_CRIT,
"password - out of memory");
ret = PAM_BUF_ERR;
goto out;
}
- (void) strcpy(Announce, greeting);
- (void) strcpy(Announce + sizeof(greeting) - 1, user);
#undef greeting
lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
@@ -2578,6 +2570,7 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
"(current) NT password: ",
NULL,
(const char **) &pass_old);
+ TALLOC_FREE(Announce);
if (ret != PAM_SUCCESS) {
_pam_log(ctx, LOG_NOTICE,
"password - (old) token not obtained");
@@ -2760,7 +2753,7 @@ out:
_PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
- _pam_winbind_free_context(ctx);
+ TALLOC_FREE(ctx);
return ret;
}
diff --git a/source3/nsswitch/pam_winbind.h b/source3/nsswitch/pam_winbind.h
index 6dba127cdc..425471d0d6 100644
--- a/source3/nsswitch/pam_winbind.h
+++ b/source3/nsswitch/pam_winbind.h
@@ -7,6 +7,7 @@
#include "../lib/replace/replace.h"
#include "system/syslog.h"
#include "system/time.h"
+#include <talloc.h>
#define MODULE_NAME "pam_winbind"
#define PAM_SM_AUTH
@@ -209,3 +210,8 @@ struct pwb_context {
dictionary *dict;
uint32_t ctrl;
};
+
+#define TALLOC_FREE(ctx) do { if ((ctx) != NULL) {talloc_free(ctx); ctx=NULL;} } while(0)
+#define TALLOC_ZERO_P(ctx, type) (type *)_talloc_zero(ctx, sizeof(type), #type)
+#define TALLOC_P(ctx, type) (type *)talloc_named_const(ctx, sizeof(type), #type)
+
generated by cgit (git 2.34.1) at 2024-10-31 02:30:23 +0000