Move all krb5 provider init functions

Put all init functions in their own file so that the other files can be
reused in other providers w/o having them in the way.

4 files changed, 261 insertions, 193 deletions

diff --git a/server/providers/krb5/krb5_auth.c b/server/providers/krb5/krb5_auth.c
index 4d98b931..1e689d93 100644
--- a/server/providers/krb5/krb5_auth.c
+++ b/server/providers/krb5/krb5_auth.c
@@ -27,16 +27,12 @@
 
 #include <sys/types.h>
 #include <sys/wait.h>
-#include <unistd.h>
 #include <fcntl.h>
 #include <pwd.h>
-#include <sys/stat.h>
-
 
 #include <security/pam_modules.h>
 
 #include "util/util.h"
-#include "providers/dp_backend.h"
 #include "db/sysdb.h"
 #include "providers/krb5/krb5_auth.h"
 #include "providers/krb5/krb5_utils.h"
@@ -141,7 +137,8 @@ errno_t create_send_buffer(struct krb5child_req *kr, struct io_buffer **io_buf)
     return EOK;
 }
 
-static struct krb5_ctx *get_krb5_ctx(struct be_req *be_req) {
+static struct krb5_ctx *get_krb5_ctx(struct be_req *be_req)
+{
     struct pam_data *pd;
 
     pd = talloc_get_type(be_req->req_data, struct pam_data);
@@ -161,7 +158,8 @@ static struct krb5_ctx *get_krb5_ctx(struct be_req *be_req) {
     }
 }
 
-static void fd_nonblocking(int fd) {
+static void fd_nonblocking(int fd)
+{
     int flags;
 
     flags = fcntl(fd, F_GETFL, 0);
@@ -297,9 +295,9 @@ failed:
     return err;
 }
 
-static void wait_for_child_handler(struct tevent_context *ev,
-                                struct tevent_signal *sige, int signum,
-                                int count, void *__siginfo, void *pvt)
+void krb5_child_sig_handler(struct tevent_context *ev,
+                            struct tevent_signal *sige, int signum,
+                            int count, void *__siginfo, void *pvt)
 {
     int ret;
     int child_status;
@@ -496,12 +494,12 @@ struct read_pipe_state {
     size_t len;
 };
 
-static void read_pipe_done(struct tevent_context *ev, struct tevent_fd *fde,
-                         uint16_t flags, void *pvt);
+static void read_pipe_done(struct tevent_context *ev,
+                           struct tevent_fd *fde,
+                           uint16_t flags, void *pvt);
 
 static struct tevent_req *read_pipe_send(TALLOC_CTX *memctx,
-                                       struct tevent_context *ev,
-                                       int fd)
+                                         struct tevent_context *ev, int fd)
 {
     struct tevent_req *req;
     struct read_pipe_state *state;
@@ -530,8 +528,9 @@ fail:
     return NULL;
 }
 
-static void read_pipe_done(struct tevent_context *ev, struct tevent_fd *fde,
-                         uint16_t flags, void *pvt)
+static void read_pipe_done(struct tevent_context *ev,
+                           struct tevent_fd *fde,
+                           uint16_t flags, void *pvt)
 {
     ssize_t size;
     struct tevent_req *req = talloc_get_type(pvt, struct tevent_req);
@@ -569,7 +568,8 @@ static void read_pipe_done(struct tevent_context *ev, struct tevent_fd *fde,
 }
 
 static ssize_t read_pipe_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
-                        uint8_t **buf, uint64_t *error) {
+                              uint8_t **buf, uint64_t *error)
+{
     struct read_pipe_state *state = tevent_req_data(req,
                                                     struct read_pipe_state);
     enum tevent_req_state tstate;
@@ -590,8 +590,9 @@ struct handle_child_state {
 
 static void handle_child_done(struct tevent_req *subreq);
 
-static struct tevent_req *handle_child_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
-                        struct krb5child_req *kr)
+static struct tevent_req *handle_child_send(TALLOC_CTX *mem_ctx,
+                                            struct tevent_context *ev,
+                                            struct krb5child_req *kr)
 {
     int ret;
     struct tevent_req *req;
@@ -656,8 +657,10 @@ static void handle_child_done(struct tevent_req *subreq)
     return;
 }
 
-static ssize_t handle_child_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
-                     uint8_t **buf, uint64_t *error) {
+static ssize_t handle_child_recv(struct tevent_req *req,
+                                 TALLOC_CTX *mem_ctx,
+                                 uint8_t **buf, uint64_t *error)
+{
     struct handle_child_state *state = tevent_req_data(req,
                                                     struct handle_child_state);
     enum tevent_req_state tstate;
@@ -674,7 +677,7 @@ static void get_user_upn_done(void *pvt, int err, struct ldb_result *res);
 static void krb5_pam_handler_done(struct tevent_req *req);
 static void krb5_pam_handler_cache_done(struct tevent_req *treq);
 
-static void krb5_pam_handler(struct be_req *be_req)
+void krb5_pam_handler(struct be_req *be_req)
 {
     struct pam_data *pd;
     const char **attrs;
@@ -968,162 +971,3 @@ static void krb_reply(struct be_req *req, int dp_err, int result)
     req->fn(req, dp_err, result, NULL);
 }
 
-
-struct bet_ops krb5_auth_ops = {
-    .handler = krb5_pam_handler,
-    .finalize = NULL,
-};
-
-struct bet_ops krb5_chpass_ops = {
-    .handler = krb5_pam_handler,
-    .finalize = NULL,
-};
-
-
-int sssm_krb5_auth_init(struct be_ctx *bectx,
-                        struct bet_ops **ops, void **pvt_auth_data)
-{
-    struct krb5_ctx *ctx = NULL;
-    char *value = NULL;
-    int int_value;
-    int ret;
-    struct tevent_signal *sige;
-    struct stat stat_buf;
-    unsigned v;
-    FILE *debug_filep;
-
-    ctx = talloc_zero(bectx, struct krb5_ctx);
-    if (!ctx) {
-        DEBUG(1, ("talloc failed.\n"));
-        return ENOMEM;
-    }
-
-    ctx->action = INIT_PW;
-
-    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
-                            CONFDB_KRB5_KDCIP, NULL, &value);
-    if (ret != EOK) goto fail;
-    if (value == NULL) {
-        DEBUG(2, ("Missing krb5KDCIP, authentication might fail.\n"));
-    } else {
-        ret = setenv(SSSD_KRB5_KDC, value, 1);
-        if (ret != EOK) {
-            DEBUG(2, ("setenv %s failed, authentication might fail.\n",
-                      SSSD_KRB5_KDC));
-        }
-    }
-    ctx->kdcip = value;
-
-    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
-                            CONFDB_KRB5_REALM, NULL, &value);
-    if (ret != EOK) goto fail;
-    if (value == NULL) {
-        DEBUG(4, ("Missing krb5REALM authentication might fail.\n"));
-    } else {
-        ret = setenv(SSSD_KRB5_REALM, value, 1);
-        if (ret != EOK) {
-            DEBUG(2, ("setenv %s failed, authentication might fail.\n",
-                      SSSD_KRB5_REALM));
-        }
-    }
-    ctx->realm = value;
-
-    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
-                            CONFDB_KRB5_CCACHEDIR, "/tmp", &value);
-    if (ret != EOK) goto fail;
-    ret = lstat(value, &stat_buf);
-    if (ret != EOK) {
-        DEBUG(1, ("lstat for [%s] failed: [%d][%s].\n", value, errno,
-                  strerror(errno)));
-        goto fail;
-    }
-    if ( !S_ISDIR(stat_buf.st_mode) ) {
-        DEBUG(1, ("Value of krb5ccache_dir [%s] is not a directory.\n", value));
-        goto fail;
-    }
-    ctx->ccache_dir = value;
-
-    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
-                            CONFDB_KRB5_CCNAME_TMPL,
-                            "FILE:%d/krb5cc_%U_XXXXXX",
-                            &value);
-    if (ret != EOK) goto fail;
-    if (value[0] != '/' && strncmp(value, "FILE:", 5) != 0) {
-        DEBUG(1, ("Currently only file based credential caches are supported "
-                  "and krb5ccname_template must start with '/' or 'FILE:'\n"));
-        goto fail;
-    }
-    ctx->ccname_template = value;
-
-    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
-                            CONFDB_KRB5_CHANGEPW_PRINC,
-                            "kadmin/changepw",
-                            &value);
-    if (ret != EOK) goto fail;
-    if (strchr(value, '@') == NULL) {
-        value = talloc_asprintf_append(value, "@%s", ctx->realm);
-        if (value == NULL) {
-            DEBUG(7, ("talloc_asprintf_append failed.\n"));
-            goto fail;
-        }
-    }
-    ctx->changepw_principle = value;
-
-    ret = setenv(SSSD_KRB5_CHANGEPW_PRINCIPLE, ctx->changepw_principle, 1);
-    if (ret != EOK) {
-        DEBUG(2, ("setenv %s failed, password change might fail.\n",
-                  SSSD_KRB5_CHANGEPW_PRINCIPLE));
-    }
-
-    ret = confdb_get_int(bectx->cdb, ctx, bectx->conf_path,
-                         CONFDB_KRB5_AUTH_TIMEOUT, 15, &int_value);
-    if (ret != EOK) goto fail;
-    if (int_value <= 0) {
-        DEBUG(4, ("krb5auth_timeout has to be a positive value.\n"));
-        goto fail;
-    }
-    ctx->auth_timeout = int_value;
-
-/* TODO: set options */
-
-    sige = tevent_add_signal(bectx->ev, ctx, SIGCHLD, SA_SIGINFO,
-                       wait_for_child_handler, NULL);
-    if (sige == NULL) {
-        DEBUG(1, ("tevent_add_signal failed.\n"));
-        ret = ENOMEM;
-        goto fail;
-    }
-
-    if (debug_to_file != 0) {
-        ret = open_debug_file_ex("krb5_child", &debug_filep);
-        if (ret != EOK) {
-            DEBUG(0, ("Error setting up logging (%d) [%s]\n",
-                    ret, strerror(ret)));
-            goto fail;
-        }
-
-        ctx->child_debug_fd = fileno(debug_filep);
-        if (ctx->child_debug_fd == -1) {
-            DEBUG(0, ("fileno failed [%d][%s]\n", errno, strerror(errno)));
-            ret = errno;
-            goto fail;
-        }
-
-        v = fcntl(ctx->child_debug_fd, F_GETFD, 0);
-        fcntl(ctx->child_debug_fd, F_SETFD, v & ~FD_CLOEXEC);
-    }
-
-    *ops = &krb5_auth_ops;
-    *pvt_auth_data = ctx;
-    return EOK;
-
-fail:
-    talloc_free(ctx);
-    return ret;
-}
-
-int sssm_krb5_chpass_init(struct be_ctx *bectx, struct bet_ops **ops,
-                   void **pvt_auth_data)
-{
-    return sssm_krb5_auth_init(bectx, ops, pvt_auth_data);
-}
diff --git a/server/providers/krb5/krb5_auth.h b/server/providers/krb5/krb5_auth.h
index 1fd7c589..9e9142cf 100644
--- a/server/providers/krb5/krb5_auth.h
+++ b/server/providers/krb5/krb5_auth.h
@@ -26,23 +26,12 @@
 #ifndef __KRB5_AUTH_H__
 #define __KRB5_AUTH_H__
 
-#include "config.h"
-
-#include <stdbool.h>
-
-#ifdef HAVE_KRB5_KRB5_H
-#include <krb5/krb5.h>
-#else
-#include <krb5.h>
-#endif
+#include "providers/dp_backend.h"
+#include "providers/krb5/krb5_common.h"
 
 #define MAX_CHILD_MSG_SIZE 255
 #define CCACHE_ENV_NAME "KRB5CCNAME"
-
 #define SSSD_KRB5_CHANGEPW_PRINCIPLE "SSSD_KRB5_CHANGEPW_PRINCIPLE"
-#define SSSD_KRB5_KDC "SSSD_KRB5_KDC"
-#define SSSD_KRB5_REALM "SSSD_KRB5_REALM"
-
 
 typedef enum { INIT_PW, INIT_KT, RENEW, VALIDATE } action_type;
 
@@ -95,4 +84,10 @@ struct krb5_ctx {
     int child_debug_fd;
 };
 
+void krb5_pam_handler(struct be_req *be_req);
+
+void krb5_child_sig_handler(struct tevent_context *ev,
+                            struct tevent_signal *sige, int signum,
+                            int count, void *__siginfo, void *pvt);
+
 #endif /* __KRB5_AUTH_H__ */
diff --git a/server/providers/krb5/krb5_common.h b/server/providers/krb5/krb5_common.h
new file mode 100644
index 00000000..64e43605
--- /dev/null
+++ b/server/providers/krb5/krb5_common.h
@@ -0,0 +1,40 @@
+/*
+    SSSD
+
+    Kerberos Backend, common header file
+
+    Authors:
+        Sumit Bose <sbose@redhat.com>
+
+    Copyright (C) 2009 Red Hat
+
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __KRB5_COMMON_H__
+#define __KRB5_COMMON_H__
+
+#include "config.h"
+#include <stdbool.h>
+#ifdef HAVE_KRB5_KRB5_H
+#include <krb5/krb5.h>
+#else
+#include <krb5.h>
+#endif
+
+#define SSSD_KRB5_KDC "SSSD_KRB5_KDC"
+#define SSSD_KRB5_REALM "SSSD_KRB5_REALM"
+
+#endif /* __KRB5_COMMON_H__ */
diff --git a/server/providers/krb5/krb5_init.c b/server/providers/krb5/krb5_init.c
new file mode 100644
index 00000000..676d078d
--- /dev/null
+++ b/server/providers/krb5/krb5_init.c
@@ -0,0 +1,189 @@
+/*
+    SSSD
+
+    Kerberos 5 Backend Module
+
+    Authors:
+        Sumit Bose <sbose@redhat.com>
+
+    Copyright (C) 2009 Red Hat
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include "providers/krb5/krb5_auth.h"
+
+struct bet_ops krb5_auth_ops = {
+    .handler = krb5_pam_handler,
+    .finalize = NULL,
+};
+
+struct bet_ops krb5_chpass_ops = {
+    .handler = krb5_pam_handler,
+    .finalize = NULL,
+};
+
+int sssm_krb5_auth_init(struct be_ctx *bectx,
+                        struct bet_ops **ops,
+                        void **pvt_auth_data)
+{
+    struct krb5_ctx *ctx = NULL;
+    char *value = NULL;
+    int int_value;
+    int ret;
+    struct tevent_signal *sige;
+    struct stat stat_buf;
+    unsigned v;
+    FILE *debug_filep;
+
+    ctx = talloc_zero(bectx, struct krb5_ctx);
+    if (!ctx) {
+        DEBUG(1, ("talloc failed.\n"));
+        return ENOMEM;
+    }
+
+    ctx->action = INIT_PW;
+
+    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
+                            CONFDB_KRB5_KDCIP, NULL, &value);
+    if (ret != EOK) goto fail;
+    if (value == NULL) {
+        DEBUG(2, ("Missing krb5KDCIP, authentication might fail.\n"));
+    } else {
+        ret = setenv(SSSD_KRB5_KDC, value, 1);
+        if (ret != EOK) {
+            DEBUG(2, ("setenv %s failed, authentication might fail.\n",
+                      SSSD_KRB5_KDC));
+        }
+    }
+    ctx->kdcip = value;
+
+    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
+                            CONFDB_KRB5_REALM, NULL, &value);
+    if (ret != EOK) goto fail;
+    if (value == NULL) {
+        DEBUG(4, ("Missing krb5REALM authentication might fail.\n"));
+    } else {
+        ret = setenv(SSSD_KRB5_REALM, value, 1);
+        if (ret != EOK) {
+            DEBUG(2, ("setenv %s failed, authentication might fail.\n",
+                      SSSD_KRB5_REALM));
+        }
+    }
+    ctx->realm = value;
+
+    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
+                            CONFDB_KRB5_CCACHEDIR, "/tmp", &value);
+    if (ret != EOK) goto fail;
+    ret = lstat(value, &stat_buf);
+    if (ret != EOK) {
+        DEBUG(1, ("lstat for [%s] failed: [%d][%s].\n", value, errno,
+                  strerror(errno)));
+        goto fail;
+    }
+    if ( !S_ISDIR(stat_buf.st_mode) ) {
+        DEBUG(1, ("Value of krb5ccache_dir [%s] is not a directory.\n", value));
+        goto fail;
+    }
+    ctx->ccache_dir = value;
+
+    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
+                            CONFDB_KRB5_CCNAME_TMPL,
+                            "FILE:%d/krb5cc_%U_XXXXXX",
+                            &value);
+    if (ret != EOK) goto fail;
+    if (value[0] != '/' && strncmp(value, "FILE:", 5) != 0) {
+        DEBUG(1, ("Currently only file based credential caches are supported "
+                  "and krb5ccname_template must start with '/' or 'FILE:'\n"));
+        goto fail;
+    }
+    ctx->ccname_template = value;
+
+    ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
+                            CONFDB_KRB5_CHANGEPW_PRINC,
+                            "kadmin/changepw",
+                            &value);
+    if (ret != EOK) goto fail;
+    if (strchr(value, '@') == NULL) {
+        value = talloc_asprintf_append(value, "@%s", ctx->realm);
+        if (value == NULL) {
+            DEBUG(7, ("talloc_asprintf_append failed.\n"));
+            goto fail;
+        }
+    }
+    ctx->changepw_principle = value;
+
+    ret = setenv(SSSD_KRB5_CHANGEPW_PRINCIPLE, ctx->changepw_principle, 1);
+    if (ret != EOK) {
+        DEBUG(2, ("setenv %s failed, password change might fail.\n",
+                  SSSD_KRB5_CHANGEPW_PRINCIPLE));
+    }
+
+    ret = confdb_get_int(bectx->cdb, ctx, bectx->conf_path,
+                         CONFDB_KRB5_AUTH_TIMEOUT, 15, &int_value);
+    if (ret != EOK) goto fail;
+    if (int_value <= 0) {
+        DEBUG(4, ("krb5auth_timeout has to be a positive value.\n"));
+        goto fail;
+    }
+    ctx->auth_timeout = int_value;
+
+/* TODO: set options */
+
+    sige = tevent_add_signal(bectx->ev, ctx, SIGCHLD, SA_SIGINFO,
+                             krb5_child_sig_handler, NULL);
+    if (sige == NULL) {
+        DEBUG(1, ("tevent_add_signal failed.\n"));
+        ret = ENOMEM;
+        goto fail;
+    }
+
+    if (debug_to_file != 0) {
+        ret = open_debug_file_ex("krb5_child", &debug_filep);
+        if (ret != EOK) {
+            DEBUG(0, ("Error setting up logging (%d) [%s]\n",
+                    ret, strerror(ret)));
+            goto fail;
+        }
+
+        ctx->child_debug_fd = fileno(debug_filep);
+        if (ctx->child_debug_fd == -1) {
+            DEBUG(0, ("fileno failed [%d][%s]\n", errno, strerror(errno)));
+            ret = errno;
+            goto fail;
+        }
+
+        v = fcntl(ctx->child_debug_fd, F_GETFD, 0);
+        fcntl(ctx->child_debug_fd, F_SETFD, v & ~FD_CLOEXEC);
+    }
+
+    *ops = &krb5_auth_ops;
+    *pvt_auth_data = ctx;
+    return EOK;
+
+fail:
+    talloc_free(ctx);
+    return ret;
+}
+
+int sssm_krb5_chpass_init(struct be_ctx *bectx,
+                          struct bet_ops **ops,
+                          void **pvt_auth_data)
+{
+    return sssm_krb5_auth_init(bectx, ops, pvt_auth_data);
+}