r10596: Move the credentials code into it's own subsystem, and push it under auth/

Andrew Bartlett
(This used to be commit 2e76a4b8efd59c496d64241d654538d3222545c6)

3 files changed, 1103 insertions, 0 deletions

diff --git a/source4/auth/credentials/credentials.c b/source4/auth/credentials/credentials.c
new file mode 100644
index 0000000000..11b413b1c6
--- /dev/null
+++ b/source4/auth/credentials/credentials.c
@@ -0,0 +1,562 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   User credentials handling
+
+   Copyright (C) Jelmer Vernooij 2005
+   Copyright (C) Tim Potter 2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "lib/ldb/include/ldb.h"
+#include "librpc/gen_ndr/ndr_samr.h" /* for struct samrPassword */
+
+
+/**
+ * Create a new credentials structure
+ * @param mem_ctx TALLOC_CTX parent for credentials structure 
+ */
+struct cli_credentials *cli_credentials_init(TALLOC_CTX *mem_ctx) 
+{
+	struct cli_credentials *cred = talloc(mem_ctx, struct cli_credentials);
+	if (!cred) {
+		return cred;
+	}
+
+	cred->netlogon_creds = NULL;
+	cred->machine_account_pending = False;
+	cred->workstation_obtained = CRED_UNINITIALISED;
+	cred->username_obtained = CRED_UNINITIALISED;
+	cred->password_obtained = CRED_UNINITIALISED;
+	cred->domain_obtained = CRED_UNINITIALISED;
+	cred->realm_obtained = CRED_UNINITIALISED;
+	cred->ccache_obtained = CRED_UNINITIALISED;
+	cred->principal_obtained = CRED_UNINITIALISED;
+	return cred;
+}
+
+/**
+ * Obtain the username for this credentials context.
+ * @param cred credentials context
+ * @retval The username set on this context.
+ * @note Return value will never be NULL except by programmer error.
+ */
+const char *cli_credentials_get_username(struct cli_credentials *cred)
+{
+	if (cred->machine_account_pending) {
+		cli_credentials_set_machine_account(cred);
+	}
+
+	if (cred->username_obtained == CRED_CALLBACK) {
+		cred->username = cred->username_cb(cred);
+		cred->username_obtained = CRED_SPECIFIED;
+	}
+
+	return cred->username;
+}
+
+BOOL cli_credentials_set_username(struct cli_credentials *cred, 
+				  const char *val, enum credentials_obtained obtained)
+{
+	if (obtained >= cred->username_obtained) {
+		cred->username = talloc_strdup(cred, val);
+		cred->username_obtained = obtained;
+		return True;
+	}
+
+	return False;
+}
+
+BOOL cli_credentials_set_username_callback(struct cli_credentials *cred,
+				  const char *(*username_cb) (struct cli_credentials *))
+{
+	if (cred->username_obtained < CRED_CALLBACK) {
+		cred->username_cb = username_cb;
+		cred->username_obtained = CRED_CALLBACK;
+		return True;
+	}
+
+	return False;
+}
+
+
+
+/**
+ * Obtain the client principal for this credentials context.
+ * @param cred credentials context
+ * @retval The username set on this context.
+ * @note Return value will never be NULL except by programmer error.
+ */
+const char *cli_credentials_get_principal(struct cli_credentials *cred, TALLOC_CTX *mem_ctx)
+{
+	if (cred->machine_account_pending) {
+		cli_credentials_set_machine_account(cred);
+	}
+
+	if (cred->principal_obtained == CRED_CALLBACK) {
+		cred->principal = cred->principal_cb(cred);
+		cred->principal_obtained = CRED_SPECIFIED;
+	}
+
+	if (cred->principal_obtained < cred->username_obtained) {
+		if (cred->domain_obtained > cred->realm_obtained) {
+			return talloc_asprintf(mem_ctx, "%s@%s", 
+					       cli_credentials_get_username(cred),
+					       cli_credentials_get_domain(cred));
+		} else {
+			return talloc_asprintf(mem_ctx, "%s@%s", 
+					       cli_credentials_get_username(cred),
+					       cli_credentials_get_realm(cred));
+		}
+	}
+	return talloc_reference(mem_ctx, cred->principal);
+}
+
+BOOL cli_credentials_set_principal(struct cli_credentials *cred, 
+				   const char *val, 
+				   enum credentials_obtained obtained)
+{
+	if (obtained >= cred->principal_obtained) {
+		cred->principal = talloc_strdup(cred, val);
+		cred->principal_obtained = obtained;
+		return True;
+	}
+
+	return False;
+}
+
+BOOL cli_credentials_set_principal_callback(struct cli_credentials *cred,
+				  const char *(*principal_cb) (struct cli_credentials *))
+{
+	if (cred->principal_obtained < CRED_CALLBACK) {
+		cred->principal_cb = principal_cb;
+		cred->principal_obtained = CRED_CALLBACK;
+		return True;
+	}
+
+	return False;
+}
+
+BOOL cli_credentials_authentication_requested(struct cli_credentials *cred) 
+{
+	if (cred->principal_obtained >= CRED_SPECIFIED) {
+		return True;
+	}
+	if (cred->username_obtained >= CRED_SPECIFIED) {
+		return True;
+	}
+	return False;
+}
+
+/**
+ * Obtain the password for this credentials context.
+ * @param cred credentials context
+ * @retval If set, the cleartext password, otherwise NULL
+ */
+const char *cli_credentials_get_password(struct cli_credentials *cred)
+{
+	if (cred->machine_account_pending) {
+		cli_credentials_set_machine_account(cred);
+	}
+
+	if (cred->password_obtained == CRED_CALLBACK) {
+		cred->password = cred->password_cb(cred);
+		cred->password_obtained = CRED_SPECIFIED;
+	}
+
+	return cred->password;
+}
+
+BOOL cli_credentials_set_password(struct cli_credentials *cred, 
+				  const char *val, 
+				  enum credentials_obtained obtained)
+{
+	if (obtained >= cred->password_obtained) {
+		cred->password = talloc_strdup(cred, val);
+		cred->password_obtained = obtained;
+
+		cred->nt_hash = NULL;
+		return True;
+	}
+
+	return False;
+}
+
+BOOL cli_credentials_set_password_callback(struct cli_credentials *cred,
+					   const char *(*password_cb) (struct cli_credentials *))
+{
+	if (cred->password_obtained < CRED_CALLBACK) {
+		cred->password_cb = password_cb;
+		cred->password_obtained = CRED_CALLBACK;
+		return True;
+	}
+
+	return False;
+}
+
+/**
+ * Obtain the password for this credentials context.
+ * @param cred credentials context
+ * @retval If set, the cleartext password, otherwise NULL
+ */
+const struct samr_Password *cli_credentials_get_nt_hash(struct cli_credentials *cred, 
+							TALLOC_CTX *mem_ctx)
+{
+	const char *password = cli_credentials_get_password(cred);
+
+	if (password) {
+		struct samr_Password *nt_hash = talloc(mem_ctx, struct samr_Password);
+		if (!nt_hash) {
+			return NULL;
+		}
+		
+		E_md4hash(password, nt_hash->hash);    
+
+		return nt_hash;
+	} else {
+		return cred->nt_hash;
+	}
+}
+
+BOOL cli_credentials_set_nt_hash(struct cli_credentials *cred,
+				 const struct samr_Password *nt_hash, 
+				 enum credentials_obtained obtained)
+{
+	if (obtained >= cred->password_obtained) {
+		cli_credentials_set_password(cred, NULL, obtained);
+		cred->nt_hash = talloc(cred, struct samr_Password);
+		*cred->nt_hash = *nt_hash;
+		return True;
+	}
+
+	return False;
+}
+
+/**
+ * Obtain the 'short' or 'NetBIOS' domain for this credentials context.
+ * @param cred credentials context
+ * @retval The domain set on this context. 
+ * @note Return value will never be NULL except by programmer error.
+ */
+const char *cli_credentials_get_domain(struct cli_credentials *cred)
+{
+	if (cred->machine_account_pending) {
+		cli_credentials_set_machine_account(cred);
+	}
+
+	if (cred->domain_obtained == CRED_CALLBACK) {
+		cred->domain = cred->domain_cb(cred);
+		cred->domain_obtained = CRED_SPECIFIED;
+	}
+
+	return cred->domain;
+}
+
+
+BOOL cli_credentials_set_domain(struct cli_credentials *cred, 
+				const char *val, 
+				enum credentials_obtained obtained)
+{
+	if (obtained >= cred->domain_obtained) {
+		cred->domain = talloc_strdup(cred, val);
+		cred->domain_obtained = obtained;
+		return True;
+	}
+
+	return False;
+}
+
+BOOL cli_credentials_set_domain_callback(struct cli_credentials *cred,
+					 const char *(*domain_cb) (struct cli_credentials *))
+{
+	if (cred->domain_obtained < CRED_CALLBACK) {
+		cred->domain_cb = domain_cb;
+		cred->domain_obtained = CRED_CALLBACK;
+		return True;
+	}
+
+	return False;
+}
+
+void cli_credentials_get_ntlm_username_domain(struct cli_credentials *cred, TALLOC_CTX *mem_ctx, 
+					      const char **username, 
+					      const char **domain) 
+{
+	if (cred->principal_obtained > cred->username_obtained) {
+		*domain = talloc_strdup(mem_ctx, "");
+		*username = cli_credentials_get_principal(cred, mem_ctx);
+	} else {
+		*domain = cli_credentials_get_domain(cred);
+		*username = cli_credentials_get_username(cred);
+	}
+}
+
+/**
+ * Obtain the Kerberos realm for this credentials context.
+ * @param cred credentials context
+ * @retval The realm set on this context. 
+ * @note Return value will never be NULL except by programmer error.
+ */
+const char *cli_credentials_get_realm(struct cli_credentials *cred)
+{	
+	if (cred->machine_account_pending) {
+		cli_credentials_set_machine_account(cred);
+	}
+
+	if (cred->realm_obtained == CRED_CALLBACK) {
+		cred->realm = cred->realm_cb(cred);
+		cred->realm_obtained = CRED_SPECIFIED;
+	}
+
+	return cred->realm;
+}
+
+/**
+ * Set the realm for this credentials context, and force it to
+ * uppercase for the sainity of our local kerberos libraries 
+ */
+BOOL cli_credentials_set_realm(struct cli_credentials *cred, 
+			       const char *val, 
+			       enum credentials_obtained obtained)
+{
+	if (obtained >= cred->realm_obtained) {
+		cred->realm = strupper_talloc(cred, val);
+		cred->realm_obtained = obtained;
+		return True;
+	}
+
+	return False;
+}
+
+BOOL cli_credentials_set_realm_callback(struct cli_credentials *cred,
+					const char *(*realm_cb) (struct cli_credentials *))
+{
+	if (cred->realm_obtained < CRED_CALLBACK) {
+		cred->realm_cb = realm_cb;
+		cred->realm_obtained = CRED_CALLBACK;
+		return True;
+	}
+
+	return False;
+}
+
+/**
+ * Obtain the 'short' or 'NetBIOS' workstation name for this credentials context.
+ *
+ * @param cred credentials context
+ * @retval The workstation name set on this context. 
+ * @note Return value will never be NULL except by programmer error.
+ */
+const char *cli_credentials_get_workstation(struct cli_credentials *cred)
+{
+	if (cred->workstation_obtained == CRED_CALLBACK) {
+		cred->workstation = cred->workstation_cb(cred);
+		cred->workstation_obtained = CRED_SPECIFIED;
+	}
+
+	return cred->workstation;
+}
+
+BOOL cli_credentials_set_workstation(struct cli_credentials *cred, 
+				     const char *val, 
+				     enum credentials_obtained obtained)
+{
+	if (obtained >= cred->workstation_obtained) {
+		cred->workstation = talloc_strdup(cred, val);
+		cred->workstation_obtained = obtained;
+		return True;
+	}
+
+	return False;
+}
+
+BOOL cli_credentials_set_workstation_callback(struct cli_credentials *cred,
+					      const char *(*workstation_cb) (struct cli_credentials *))
+{
+	if (cred->workstation_obtained < CRED_CALLBACK) {
+		cred->workstation_cb = workstation_cb;
+		cred->workstation_obtained = CRED_CALLBACK;
+		return True;
+	}
+
+	return False;
+}
+
+/**
+ * Given a string, typically obtained from a -U argument, parse it into domain, username, realm and password fields
+ *
+ * The format accepted is [domain\\]user[%password] or user[@realm][%password]
+ *
+ * @param credentials Credentials structure on which to set the password
+ * @param data the string containing the username, password etc
+ * @param obtained This enum describes how 'specified' this password is
+ */
+
+void cli_credentials_parse_string(struct cli_credentials *credentials, const char *data, enum credentials_obtained obtained)
+{
+	char *uname, *p;
+
+	if (strcmp("%",data) == 0) {
+		cli_credentials_set_anonymous(credentials);
+		return;
+	}
+
+	uname = talloc_strdup(credentials, data); 
+	if ((p = strchr_m(uname,'%'))) {
+		*p = 0;
+		cli_credentials_set_password(credentials, p+1, obtained);
+	}
+
+	if ((p = strchr_m(uname,'@'))) {
+		cli_credentials_set_principal(credentials, uname, obtained);
+		*p = 0;
+		cli_credentials_set_realm(credentials, p+1, obtained);
+		return;
+	} else if ((p = strchr_m(uname,'\\')) || (p = strchr_m(uname, '/'))) {
+		*p = 0;
+		cli_credentials_set_domain(credentials, uname, obtained);
+		uname = p+1;
+	}
+	cli_credentials_set_username(credentials, uname, obtained);
+}
+
+/**
+ * Specifies default values for domain, workstation and realm
+ * from the smb.conf configuration file
+ *
+ * @param cred Credentials structure to fill in
+ */
+void cli_credentials_set_conf(struct cli_credentials *cred)
+{
+	cli_credentials_set_username(cred, "", CRED_UNINITIALISED);
+	cli_credentials_set_domain(cred, lp_workgroup(), CRED_UNINITIALISED);
+	cli_credentials_set_workstation(cred, lp_netbios_name(), CRED_UNINITIALISED);
+	cli_credentials_set_realm(cred, lp_realm(), CRED_UNINITIALISED);
+}
+
+/**
+ * Guess defaults for credentials from environment variables, 
+ * and from the configuration file
+ * 
+ * @param cred Credentials structure to fill in
+ */
+void cli_credentials_guess(struct cli_credentials *cred)
+{
+	char *p;
+
+	cli_credentials_set_conf(cred);
+	
+	if (getenv("LOGNAME")) {
+		cli_credentials_set_username(cred, getenv("LOGNAME"), CRED_GUESS_ENV);
+	}
+
+	if (getenv("USER")) {
+		cli_credentials_parse_string(cred, getenv("USER"), CRED_GUESS_ENV);
+		if ((p = strchr_m(getenv("USER"),'%'))) {
+			memset(p,0,strlen(cred->password));
+		}
+	}
+
+	if (getenv("DOMAIN")) {
+		cli_credentials_set_domain(cred, getenv("DOMAIN"), CRED_GUESS_ENV);
+	}
+
+	if (getenv("PASSWD")) {
+		cli_credentials_set_password(cred, getenv("PASSWD"), CRED_GUESS_ENV);
+	}
+
+	if (getenv("PASSWD_FD")) {
+		cli_credentials_parse_password_fd(cred, atoi(getenv("PASSWD_FD")), CRED_GUESS_FILE);
+	}
+	
+	if (getenv("PASSWD_FILE")) {
+		cli_credentials_parse_password_file(cred, getenv("PASSWD_FILE"), CRED_GUESS_FILE);
+	}
+
+	cli_credentials_set_ccache(cred, NULL, CRED_GUESS_FILE);
+}
+
+/**
+ * Attach NETLOGON credentials for use with SCHANNEL
+ */
+
+void cli_credentials_set_netlogon_creds(struct cli_credentials *cred, 
+					struct creds_CredentialState *netlogon_creds)
+{
+	cred->netlogon_creds = talloc_reference(cred, netlogon_creds);
+}
+
+/**
+ * Return attached NETLOGON credentials 
+ */
+
+struct creds_CredentialState *cli_credentials_get_netlogon_creds(struct cli_credentials *cred)
+{
+	return cred->netlogon_creds;
+}
+
+/** 
+ * Set NETLOGON secure channel type
+ */
+
+void cli_credentials_set_secure_channel_type(struct cli_credentials *cred,
+					     enum netr_SchannelType secure_channel_type)
+{
+	cred->secure_channel_type = secure_channel_type;
+}
+
+/**
+ * Return NETLOGON secure chanel type
+ */
+
+enum netr_SchannelType cli_credentials_get_secure_channel_type(struct cli_credentials *cred)
+{
+	return cred->secure_channel_type;
+}
+
+/**
+ * Fill in a credentials structure as the anonymous user
+ */
+void cli_credentials_set_anonymous(struct cli_credentials *cred) 
+{
+	cli_credentials_set_username(cred, "", CRED_SPECIFIED);
+	cli_credentials_set_domain(cred, "", CRED_SPECIFIED);
+	cli_credentials_set_password(cred, NULL, CRED_SPECIFIED);
+}
+
+/**
+ * Describe a credentials context as anonymous or authenticated
+ * @retval True if anonymous, False if a username is specified
+ */
+
+BOOL cli_credentials_is_anonymous(struct cli_credentials *cred)
+{
+	TALLOC_CTX *tmp_ctx = talloc_new(cred);
+	const char *username = cli_credentials_get_username(cred);
+	
+	/* Yes, it is deliberate that we die if we have a NULL pointer
+	 * here - anonymous is "", not NULL, which is 'never specified,
+	 * never guessed', ie programmer bug */
+	if (!username[0]) {
+		talloc_free(tmp_ctx);
+		return True;
+	}
+	
+	talloc_free(tmp_ctx);
+	return False;
+}
diff --git a/source4/auth/credentials/credentials_files.c b/source4/auth/credentials/credentials_files.c
new file mode 100644
index 0000000000..353ff61720
--- /dev/null
+++ b/source4/auth/credentials/credentials_files.c
@@ -0,0 +1,293 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   User credentials handling (as regards on-disk files)
+
+   Copyright (C) Jelmer Vernooij 2005
+   Copyright (C) Tim Potter 2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "lib/ldb/include/ldb.h"
+#include "librpc/gen_ndr/ndr_samr.h" /* for struct samrPassword */
+#include "include/secrets.h"
+#include "system/filesys.h"
+
+/**
+ * Read a file descriptor, and parse it for a password (eg from a file or stdin)
+ *
+ * @param credentials Credentials structure on which to set the password
+ * @param fd open file descriptor to read the password from 
+ * @param obtained This enum describes how 'specified' this password is
+ */
+
+BOOL cli_credentials_parse_password_fd(struct cli_credentials *credentials, 
+				       int fd, enum credentials_obtained obtained)
+{
+	char *p;
+	char pass[128];
+
+	for(p = pass, *p = '\0'; /* ensure that pass is null-terminated */
+		p && p - pass < sizeof(pass);) {
+		switch (read(fd, p, 1)) {
+		case 1:
+			if (*p != '\n' && *p != '\0') {
+				*++p = '\0'; /* advance p, and null-terminate pass */
+				break;
+			}
+		case 0:
+			if (p - pass) {
+				*p = '\0'; /* null-terminate it, just in case... */
+				p = NULL; /* then force the loop condition to become false */
+				break;
+			} else {
+				fprintf(stderr, "Error reading password from file descriptor %d: %s\n", fd, "empty password\n");
+				return False;
+			}
+
+		default:
+			fprintf(stderr, "Error reading password from file descriptor %d: %s\n",
+					fd, strerror(errno));
+			return False;
+		}
+	}
+
+	cli_credentials_set_password(credentials, pass, obtained);
+	return True;
+}
+
+/**
+ * Read a named file, and parse it for a password
+ *
+ * @param credentials Credentials structure on which to set the password
+ * @param file a named file to read the password from 
+ * @param obtained This enum describes how 'specified' this password is
+ */
+
+BOOL cli_credentials_parse_password_file(struct cli_credentials *credentials, const char *file, enum credentials_obtained obtained)
+{
+	int fd = open(file, O_RDONLY, 0);
+	BOOL ret;
+
+	if (fd < 0) {
+		fprintf(stderr, "Error opening PASSWD_FILE %s: %s\n",
+				file, strerror(errno));
+		return False;
+	}
+
+	ret = cli_credentials_parse_password_fd(credentials, fd, obtained);
+
+	close(fd);
+	
+	return ret;
+}
+
+/**
+ * Read a named file, and parse it for username, domain, realm and password
+ *
+ * @param credentials Credentials structure on which to set the password
+ * @param file a named file to read the details from 
+ * @param obtained This enum describes how 'specified' this password is
+ */
+
+BOOL cli_credentials_parse_file(struct cli_credentials *cred, const char *file, enum credentials_obtained obtained) 
+{
+	uint16_t len = 0;
+	char *ptr, *val, *param;
+	char **lines;
+	int i, numlines;
+
+	lines = file_lines_load(file, &numlines, NULL);
+
+	if (lines == NULL)
+	{
+		/* fail if we can't open the credentials file */
+		d_printf("ERROR: Unable to open credentials file!\n");
+		return False;
+	}
+
+	for (i = 0; i < numlines; i++) {
+		len = strlen(lines[i]);
+
+		if (len == 0)
+			continue;
+
+		/* break up the line into parameter & value.
+		 * will need to eat a little whitespace possibly */
+		param = lines[i];
+		if (!(ptr = strchr_m (lines[i], '=')))
+			continue;
+
+		val = ptr+1;
+		*ptr = '\0';
+
+		/* eat leading white space */
+		while ((*val!='\0') && ((*val==' ') || (*val=='\t')))
+			val++;
+
+		if (strwicmp("password", param) == 0) {
+			cli_credentials_set_password(cred, val, obtained);
+		} else if (strwicmp("username", param) == 0) {
+			cli_credentials_set_username(cred, val, obtained);
+		} else if (strwicmp("domain", param) == 0) {
+			cli_credentials_set_domain(cred, val, obtained);
+		} else if (strwicmp("realm", param) == 0) {
+			cli_credentials_set_realm(cred, val, obtained);
+		}
+		memset(lines[i], 0, len);
+	}
+
+	talloc_free(lines);
+
+	return True;
+}
+
+
+/**
+ * Fill in credentials for the machine trust account, from the secrets database.
+ * 
+ * @param cred Credentials structure to fill in
+ * @retval NTSTATUS error detailing any failure
+ */
+NTSTATUS cli_credentials_set_machine_account(struct cli_credentials *cred)
+{
+	TALLOC_CTX *mem_ctx;
+	
+	struct ldb_context *ldb;
+	int ldb_ret;
+	struct ldb_message **msgs;
+	const char *attrs[] = {
+		"secret",
+		"samAccountName",
+		"flatname",
+		"realm",
+		"secureChannelType",
+		"ntPwdHash",
+		"msDS-KeyVersionNumber",
+		NULL
+	};
+	
+	const char *machine_account;
+	const char *password;
+	const char *domain;
+	const char *realm;
+	enum netr_SchannelType sct;
+	
+	/* ok, we are going to get it now, don't recurse back here */
+	cred->machine_account_pending = False;
+
+	mem_ctx = talloc_named(cred, 0, "cli_credentials fetch machine password");
+	/* Local secrets are stored in secrets.ldb */
+	ldb = secrets_db_connect(mem_ctx);
+	if (!ldb) {
+		DEBUG(1, ("Could not open secrets.ldb\n"));
+		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+	}
+
+	/* search for the secret record */
+	ldb_ret = gendb_search(ldb,
+			       mem_ctx, ldb_dn_explode(mem_ctx, SECRETS_PRIMARY_DOMAIN_DN), 
+			       &msgs, attrs,
+			       SECRETS_PRIMARY_DOMAIN_FILTER, 
+			       cli_credentials_get_domain(cred));
+	if (ldb_ret == 0) {
+		DEBUG(1, ("Could not find join record to domain: %s\n",
+			  cli_credentials_get_domain(cred)));
+		talloc_free(mem_ctx);
+		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+	} else if (ldb_ret != 1) {
+		DEBUG(1, ("Found more than one (%d) join records to domain: %s\n",
+			  ldb_ret, cli_credentials_get_domain(cred)));
+		talloc_free(mem_ctx);
+		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+	}
+	
+	password = ldb_msg_find_string(msgs[0], "secret", NULL);
+
+	machine_account = ldb_msg_find_string(msgs[0], "samAccountName", NULL);
+
+	if (!machine_account) {
+		DEBUG(1, ("Could not find 'samAccountName' in join record to domain: %s\n",
+			  cli_credentials_get_domain(cred)));
+		talloc_free(mem_ctx);
+		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+	}
+	
+	sct = ldb_msg_find_int(msgs[0], "secureChannelType", 0);
+	if (!sct) { 
+		DEBUG(1, ("Domain join for acocunt %s did not have a secureChannelType set!\n",
+			  machine_account));
+		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+	}
+	
+	if (!password) {
+		const struct ldb_val *nt_password_hash = ldb_msg_find_ldb_val(msgs[0], "ntPwdHash");
+		struct samr_Password hash;
+		ZERO_STRUCT(hash);
+		if (nt_password_hash) {
+			memcpy(hash.hash, nt_password_hash->data, 
+			       MIN(nt_password_hash->length, sizeof(hash.hash)));
+		
+			cli_credentials_set_nt_hash(cred, &hash, CRED_SPECIFIED);
+		} else {
+		
+			DEBUG(1, ("Could not find 'secret' in join record to domain: %s\n",
+				  cli_credentials_get_domain(cred)));
+			talloc_free(mem_ctx);
+			return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+		}
+	}
+	
+	cli_credentials_set_secure_channel_type(cred, sct);
+
+	domain = ldb_msg_find_string(msgs[0], "flatname", NULL);
+	if (domain) {
+		cli_credentials_set_domain(cred, domain, CRED_SPECIFIED);
+	}
+
+	realm = ldb_msg_find_string(msgs[0], "realm", NULL);
+	if (realm) {
+		cli_credentials_set_realm(cred, realm, CRED_SPECIFIED);
+	}
+
+	cli_credentials_set_username(cred, machine_account, CRED_SPECIFIED);
+	if (password) {
+		cli_credentials_set_password(cred, password, CRED_SPECIFIED);
+	}
+
+	cli_credentials_set_kvno(cred, ldb_msg_find_int(msgs[0], "msDS-KeyVersionNumber", 0));
+	
+	talloc_free(mem_ctx);
+	
+	return NT_STATUS_OK;
+}
+
+/**
+ * Ask that when required, the credentials system will be filled with
+ * machine trust account, from the secrets database.
+ * 
+ * @param cred Credentials structure to fill in
+ * @note This function is used to call the above function after, rather 
+ *       than during, popt processing.
+ *
+ */
+void cli_credentials_set_machine_account_pending(struct cli_credentials *cred)
+{
+	cred->machine_account_pending = True;
+}
+
diff --git a/source4/auth/credentials/credentials_krb5.c b/source4/auth/credentials/credentials_krb5.c
new file mode 100644
index 0000000000..fb3239494e
--- /dev/null
+++ b/source4/auth/credentials/credentials_krb5.c
@@ -0,0 +1,248 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Handle user credentials (as regards krb5)
+
+   Copyright (C) Jelmer Vernooij 2005
+   Copyright (C) Tim Potter 2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "system/kerberos.h"
+#include "auth/kerberos/kerberos.h"
+
+
+int cli_credentials_set_from_ccache(struct cli_credentials *cred, 
+				    enum credentials_obtained obtained)
+{
+	
+	krb5_principal princ;
+	krb5_error_code ret;
+	char *name;
+	char **realm;
+
+	ret = krb5_cc_get_principal(cred->ccache->smb_krb5_context->krb5_context, 
+				    cred->ccache->ccache, &princ);
+
+	if (ret) {
+		char *err_mess = smb_get_krb5_error_message(cred->ccache->smb_krb5_context->krb5_context, ret, cred);
+		DEBUG(1,("failed to get principal from ccache: %s\n", 
+			 err_mess));
+		talloc_free(err_mess);
+		return ret;
+	}
+	
+	ret = krb5_unparse_name(cred->ccache->smb_krb5_context->krb5_context, princ, &name);
+	if (ret) {
+		char *err_mess = smb_get_krb5_error_message(cred->ccache->smb_krb5_context->krb5_context, ret, cred);
+		DEBUG(1,("failed to unparse principal from ccache: %s\n", 
+			 err_mess));
+		talloc_free(err_mess);
+		return ret;
+	}
+
+	realm = krb5_princ_realm(cred->ccache->smb_krb5_context->krb5_context, princ);
+
+	cli_credentials_set_principal(cred, name, obtained);
+
+	free(name);
+
+	krb5_free_principal(cred->ccache->smb_krb5_context->krb5_context, princ);
+
+	cred->ccache_obtained = obtained;
+
+	return 0;
+}
+
+
+static int free_mccache(void *ptr) {
+	struct ccache_container *ccc = ptr;
+	krb5_cc_destroy(ccc->smb_krb5_context->krb5_context, ccc->ccache);
+
+	return 0;
+}
+
+static int free_dccache(void *ptr) {
+	struct ccache_container *ccc = ptr;
+	krb5_cc_close(ccc->smb_krb5_context->krb5_context, ccc->ccache);
+
+	return 0;
+}
+
+int cli_credentials_set_ccache(struct cli_credentials *cred, 
+			       const char *name, 
+			       enum credentials_obtained obtained)
+{
+	krb5_error_code ret;
+	krb5_principal princ;
+	struct ccache_container *ccc = talloc(cred, struct ccache_container);
+	if (!ccc) {
+		return ENOMEM;
+	}
+
+	ret = smb_krb5_init_context(ccc, &ccc->smb_krb5_context);
+	if (ret) {
+		talloc_free(ccc);
+		return ret;
+	}
+	if (name) {
+		ret = krb5_cc_resolve(ccc->smb_krb5_context->krb5_context, name, &ccc->ccache);
+		if (ret) {
+			DEBUG(1,("failed to read krb5 ccache: %s: %s\n", 
+				 name, 
+				 smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
+			talloc_free(ccc);
+			return ret;
+		}
+	} else {
+		ret = krb5_cc_default(ccc->smb_krb5_context->krb5_context, &ccc->ccache);
+		if (ret) {
+			DEBUG(3,("failed to read default krb5 ccache: %s\n", 
+				 smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
+			talloc_free(ccc);
+			return ret;
+		}
+	}
+
+	talloc_set_destructor(ccc, free_dccache);
+
+	ret = krb5_cc_get_principal(ccc->smb_krb5_context->krb5_context, ccc->ccache, &princ);
+
+	if (ret) {
+		DEBUG(3,("failed to get principal from default ccache: %s\n", 
+			 smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
+		talloc_free(ccc);		
+		return ret;
+	}
+
+	krb5_free_principal(ccc->smb_krb5_context->krb5_context, princ);
+
+	cred->ccache = ccc;
+	talloc_steal(cred, ccc);
+
+	ret = cli_credentials_set_from_ccache(cred, obtained);
+
+	if (ret) {
+		return ret;
+	}
+
+	return 0;
+}
+
+
+int cli_credentials_new_ccache(struct cli_credentials *cred)
+{
+	krb5_error_code ret;
+	char *rand_string;
+	struct ccache_container *ccc = talloc(cred, struct ccache_container);
+	char *ccache_name;
+	if (!ccc) {
+		return ENOMEM;
+	}
+
+	rand_string = generate_random_str(NULL, 16);
+	if (!rand_string) {
+		talloc_free(ccc);
+		return ENOMEM;
+	}
+
+	ccache_name = talloc_asprintf(ccc, "MEMORY:%s", 
+			      rand_string);
+	talloc_free(rand_string);
+
+	if (!ccache_name) {
+		talloc_free(ccc);
+		return ENOMEM;
+	}
+
+	ret = smb_krb5_init_context(ccc, &ccc->smb_krb5_context);
+	if (ret) {
+		talloc_free(ccache_name);
+		talloc_free(ccc);
+		return ret;
+	}
+
+	ret = krb5_cc_resolve(ccc->smb_krb5_context->krb5_context, ccache_name, &ccc->ccache);
+	if (ret) {
+		DEBUG(1,("failed to generate a new krb5 ccache (%s): %s\n", 
+			 ccache_name,
+			 smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
+		talloc_free(ccache_name);
+		talloc_free(ccc);
+		return ret;
+	}
+
+	talloc_set_destructor(ccc, free_mccache);
+
+	cred->ccache = ccc;
+	talloc_steal(cred, ccc);
+	talloc_free(ccache_name);
+
+	return ret;
+}
+
+int cli_credentials_get_ccache(struct cli_credentials *cred, 
+			       struct ccache_container **ccc)
+{
+	krb5_error_code ret;
+	
+	if (cred->ccache_obtained >= (MAX(cred->principal_obtained, 
+					  cred->username_obtained))) {
+		*ccc = cred->ccache;
+		return 0;
+	}
+	if (cli_credentials_is_anonymous(cred)) {
+		return EINVAL;
+	}
+
+	ret = cli_credentials_new_ccache(cred);
+	if (ret) {
+		return ret;
+	}
+	ret = kinit_to_ccache(cred, cred, cred->ccache->smb_krb5_context, cred->ccache->ccache);
+	if (ret) {
+		return ret;
+	}
+	ret = cli_credentials_set_from_ccache(cred, cred->principal_obtained);
+
+	if (ret) {
+		return ret;
+	}
+	*ccc = cred->ccache;
+	return ret;
+}
+
+/** 
+ * Set Kerberos KVNO
+ */
+
+void cli_credentials_set_kvno(struct cli_credentials *cred,
+			      int kvno)
+{
+	cred->kvno = kvno;
+}
+
+/**
+ * Return Kerberos KVNO
+ */
+
+int cli_credentials_get_kvno(struct cli_credentials *cred)
+{
+	return cred->kvno;
+}
+