diff -up ecryptfs-utils-106/src/pam_ecryptfs/pam_ecryptfs.c.pamdata ecryptfs-utils-106/src/pam_ecryptfs/pam_ecryptfs.c

--- ecryptfs-utils-106/src/pam_ecryptfs/pam_ecryptfs.c.pamdata	2015-03-30 12:35:15.001400416 +0200

+++ ecryptfs-utils-106/src/pam_ecryptfs/pam_ecryptfs.c	2015-03-30 12:35:27.938155898 +0200

@@ -46,6 +46,26 @@

 #define PRIVATE_DIR "Private"

+#define ECRYPTFS_PAM_DATA "ecryptfs:passphrase"

+

+struct ecryptfs_pam_data {

+	int unwrap;

+	uid_t uid;

+	gid_t gid;

+	char *passphrase;

+	const char *homedir;

+	const char *username;

+	char salt[ECRYPTFS_SALT_SIZE];  

+};

+

+static void pam_free_ecryptfsdata(pam_handle_t *pamh, void *data, int error_status)

+{

+	if (data) {

+		free(((struct ecryptfs_pam_data *)data)->passphrase);

+		free(data);

+	}

+}

+

 /* returns: 0 if file does not exist, 1 if it exists, <0 for error */

 static int file_exists_dotecryptfs(const char *homedir, char *filename)

 {

@@ -65,7 +85,7 @@ out:

 	return rc;

 }

-static int wrap_passphrase_if_necessary(const char *username, uid_t uid, char *wrapped_pw_filename, char *passphrase, char *salt)

+static int wrap_passphrase_if_necessary(const char *username, uid_t uid, const char *wrapped_pw_filename, const char *passphrase, const char *salt)

 {

 	char *unwrapped_pw_filename = NULL;

 	struct stat s;

@@ -93,7 +113,7 @@ static int wrap_passphrase_if_necessary(

 }

 static int rewrap_passphrase_if_necessary(char *wrapped_pw_filename,

-					  char *wrapping_passphrase, char *salt)

+					  char *wrapping_passphrase, const char *salt)

 {

 	char passphrase[ECRYPTFS_MAX_PASSPHRASE_BYTES + 1];

 	uint8_t version;

@@ -123,147 +143,68 @@ static int rewrap_passphrase_if_necessar

 PAM_EXTERN int pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc,

 				   const char **argv)

 {

-	uid_t uid = 0, oeuid = 0;

-	long ngroups_max = sysconf(_SC_NGROUPS_MAX);

-	gid_t gid = 0, oegid = 0, groups[ngroups_max+1];

-	int ngids = 0;

-	char *homedir = NULL;

-	const char *username;

-	char *passphrase = NULL;

-	char salt[ECRYPTFS_SALT_SIZE];

 	char salt_hex[ECRYPTFS_SALT_SIZE_HEX];

-	char *auth_tok_sig = NULL;

 	char *private_mnt = NULL;

-	pid_t child_pid, tmp_pid;

 	long rc;

+	struct ecryptfs_pam_data *epd;

-	rc = pam_get_user(pamh, &username, NULL);

+	if ((epd = calloc(1, sizeof(struct ecryptfs_pam_data))) == NULL) {

+		syslog(LOG_ERR,"Memory allocation failed");

+		rc = -ENOMEM;

+		goto out;

+	}

+

+	rc = pam_get_user(pamh, &epd->username, NULL);

 	if (rc == PAM_SUCCESS) {

 		struct passwd *pwd;

-		pwd = getpwnam(username);

+		errno = 0;

+		pwd = getpwnam(epd->username);

 		if (pwd) {

-			uid = pwd->pw_uid;

-			gid = pwd->pw_gid;

-			homedir = pwd->pw_dir;

-		}

-	} else {

-		syslog(LOG_ERR, "pam_ecryptfs: Error getting passwd info for user [%s]; rc = [%ld]\n", username, rc);

-		goto out;

+			epd->uid = pwd->pw_uid;

+			epd->gid = pwd->pw_gid;

+			epd->homedir = pwd->pw_dir;

+			rc = 0;

+		} else rc = errno;

 	}

-

-	oeuid = geteuid();

-	oegid = getegid();

-	if ((ngids = getgroups(sizeof(groups)/sizeof(gid_t), groups)) < 0) {

-		syslog(LOG_ERR, "pam_ecryptfs: geteuid error");

-		goto outnouid;

-	}

-

-	if (setegid(gid) < 0 || setgroups(1, &gid) < 0 || seteuid(uid) < 0) {

-		syslog(LOG_ERR, "pam_ecryptfs: seteuid error");

+	if (!epd->homedir) {

+		syslog(LOG_ERR, "pam_ecryptfs: Error getting passwd info for user; rc = [%ld]\n", rc);

 		goto out;

 	}

-	if (!file_exists_dotecryptfs(homedir, "auto-mount"))

+	if (!file_exists_dotecryptfs(epd->homedir, "auto-mount"))

 		goto out;

-	private_mnt = ecryptfs_fetch_private_mnt(homedir);

+	private_mnt = ecryptfs_fetch_private_mnt(epd->homedir);

 	if (ecryptfs_private_is_mounted(NULL, private_mnt, NULL, 1)) {

-		syslog(LOG_DEBUG, "pam_ecryptfs: %s: %s is already mounted\n", __FUNCTION__, homedir);

+		syslog(LOG_DEBUG, "pam_ecryptfs: %s: %s is already mounted\n", __FUNCTION__, epd->homedir);

 		/* If private/home is already mounted, then we can skip

 		   costly loading of keys */

 		goto out;

 	}

-	if(file_exists_dotecryptfs(homedir, "wrapping-independent") == 1)

-		rc = pam_prompt(pamh, PAM_PROMPT_ECHO_OFF, &passphrase, "Encryption passphrase: ");

+	if(file_exists_dotecryptfs(epd->homedir, "wrapping-independent") == 1)

+		rc = pam_prompt(pamh, PAM_PROMPT_ECHO_OFF, &epd->passphrase, "Encryption passphrase: ");

 	else

-		rc = pam_get_item(pamh, PAM_AUTHTOK, (const void **)&passphrase);

+		rc = pam_get_item(pamh, PAM_AUTHTOK, (const void **)&epd->passphrase);

 	if (rc != PAM_SUCCESS) {

 		syslog(LOG_ERR, "pam_ecryptfs: Error retrieving passphrase; rc = [%ld]\n",

 		       rc);

 		goto out;

 	}

-	auth_tok_sig = malloc(ECRYPTFS_SIG_SIZE_HEX + 1);

-	if (!auth_tok_sig) {

-		rc = -ENOMEM;

-		syslog(LOG_ERR, "pam_ecryptfs: Out of memory\n");

-		goto out;

-	}

+	epd->passphrase = strdup(epd->passphrase);

 	rc = ecryptfs_read_salt_hex_from_rc(salt_hex);

 	if (rc) {

-		from_hex(salt, ECRYPTFS_DEFAULT_SALT_HEX, ECRYPTFS_SALT_SIZE);

+		from_hex(epd->salt, ECRYPTFS_DEFAULT_SALT_HEX, ECRYPTFS_SALT_SIZE);

 	} else

-		from_hex(salt, salt_hex, ECRYPTFS_SALT_SIZE);

-	if ((child_pid = fork()) == 0) {

-		/* temp regain uid 0 to drop privs */

-		seteuid(oeuid);

-		/* setgroups() already called */

-		if (setgid(gid) < 0 || setuid(uid) < 0)

-			goto out_child;

-

-		if (passphrase == NULL) {

-			syslog(LOG_ERR, "pam_ecryptfs: NULL passphrase; aborting\n");

-			rc = -EINVAL;

-			goto out_child;

-		}

-		if ((rc = ecryptfs_validate_keyring())) {

-			syslog(LOG_WARNING, "pam_ecryptfs: Cannot validate keyring integrity\n");

-		}

-		rc = 0;

-		if ((argc == 1)

-		    && (memcmp(argv[0], "unwrap\0", 7) == 0)) {

-			char *wrapped_pw_filename;

-

-			rc = asprintf(

-				&wrapped_pw_filename, "%s/.ecryptfs/%s",

-				homedir,

-				ECRYPTFS_DEFAULT_WRAPPED_PASSPHRASE_FILENAME);

-			if (rc == -1) {

-				syslog(LOG_ERR, "pam_ecryptfs: Unable to allocate memory\n");

-				rc = -ENOMEM;

-				goto out_child;

-			}

-			if (wrap_passphrase_if_necessary(username, uid, wrapped_pw_filename, passphrase, salt) == 0) {

-				syslog(LOG_DEBUG, "pam_ecryptfs: Passphrase file wrapped");

-			} else {

-				goto out_child;

-			}

-			if (rewrap_passphrase_if_necessary(wrapped_pw_filename, passphrase, salt)) {

-				/* Non fatal condition. Log a warning. */

-				syslog(LOG_WARNING, "pam_ecryptfs: Unable to rewrap passphrase file\n");

-			}

-			rc = ecryptfs_insert_wrapped_passphrase_into_keyring(

-				auth_tok_sig, wrapped_pw_filename, passphrase,

-				salt);

-			free(wrapped_pw_filename);

-		} else {

-			rc = ecryptfs_add_passphrase_key_to_keyring(

-				auth_tok_sig, passphrase, salt);

-		}

-		if (rc == 1) {

-			goto out_child;

-		}

-		if (rc) {

-			syslog(LOG_ERR, "pam_ecryptfs: Error adding passphrase key token to user session keyring; rc = [%ld]\n", rc);

-			goto out_child;

-		}

-out_child:

-		free(auth_tok_sig);

-		_exit(0);

+		from_hex(epd->salt, salt_hex, ECRYPTFS_SALT_SIZE);

+	epd->unwrap = ((argc == 1) && (memcmp(argv[0], "unwrap\0", 7) == 0));

+	if ((rc=pam_set_data(pamh, ECRYPTFS_PAM_DATA, epd, pam_free_ecryptfsdata)) != PAM_SUCCESS) {

+		syslog(LOG_ERR, "Unable to store ecryptfs pam data : %s", pam_strerror(pamh, rc));

+		goto out;

 	}

-	tmp_pid = waitpid(child_pid, NULL, 0);

-	if (tmp_pid == -1)

-		syslog(LOG_WARNING, "pam_ecryptfs: waitpid() returned with error condition\n");

-out:

-	seteuid(oeuid);

-	setegid(oegid);

-	setgroups(ngids, groups);

-

-outnouid:

+out:

 	if (private_mnt != NULL)

 		free(private_mnt);

-	if (auth_tok_sig != NULL)

-		free(auth_tok_sig);

 	return PAM_SUCCESS;

 }

@@ -407,10 +348,124 @@ static int umount_private_dir(pam_handle

 	return private_dir(pamh, 0);

 }

+static int fill_keyring(pam_handle_t *pamh)

+{

+	pid_t child_pid,tmp_pid;

+	uid_t oeuid = 0;

+	long ngroups_max = sysconf(_SC_NGROUPS_MAX);

+	gid_t oegid = 0, groups[ngroups_max+1];

+	int ngids = 0;

+	int rc = 0;

+	const struct ecryptfs_pam_data *epd;

+	char *auth_tok_sig = NULL;

+	auth_tok_sig = malloc(ECRYPTFS_SIG_SIZE_HEX + 1);

+	

+	if ((rc=pam_get_data(pamh, ECRYPTFS_PAM_DATA, (const void **)&epd)) != PAM_SUCCESS)

+	{

+		syslog(LOG_ERR,"Unable to get ecryptfs pam data : %s", pam_strerror(pamh, rc));

+		return -EINVAL;

+	}

+  

+	oeuid = geteuid();

+	oegid = getegid();

+	if ((ngids = getgroups(sizeof(groups)/sizeof(gid_t), groups)) < 0) {

+		syslog(LOG_ERR, "pam_ecryptfs: geteuid error");

+		goto outnouid;

+	}

+

+	if (setegid(epd->gid) < 0 || setgroups(1, &epd->gid) < 0 || seteuid(epd->uid) < 0) {

+		syslog(LOG_ERR, "pam_ecryptfs: seteuid error");

+		goto out;

+	}

+

+	if (!auth_tok_sig) {

+		syslog(LOG_ERR, "Out of memory\n");

+		return -ENOMEM;

+	}

+  

+ 	if ((child_pid = fork()) == 0) {

+		/* temp regain uid 0 to drop privs */

+		if (seteuid(oeuid) < 0)

+		{

+			syslog(LOG_ERR, "pam_ecryptfs: seteuid error");

+			goto out_child;

+		}

+		/* setgroups() already called */

+		if (setgid(epd->gid) < 0 || setuid(epd->uid) < 0)

+			goto out_child;

+	  

+		if (epd->passphrase == NULL) {

+			syslog(LOG_ERR, "NULL passphrase; aborting\n");

+			rc = -EINVAL;

+			goto out_child;

+		}

+		if ((rc = ecryptfs_validate_keyring())) {

+			syslog(LOG_WARNING,

+			       "Cannot validate keyring integrity\n");

+		}

+		rc = 0;

+		if (epd->unwrap) {

+			char *wrapped_pw_filename;

+

+			rc = asprintf(

+				&wrapped_pw_filename, "%s/.ecryptfs/%s",

+				epd->homedir,

+				ECRYPTFS_DEFAULT_WRAPPED_PASSPHRASE_FILENAME);

+			if (rc == -1) {

+				syslog(LOG_ERR, "Unable to allocate memory\n");

+				rc = -ENOMEM;

+				goto out_child;

+			}

+			if (wrap_passphrase_if_necessary(epd->username, epd->uid, wrapped_pw_filename, epd->passphrase, epd->salt) == 0) {

+				syslog(LOG_INFO, "Passphrase file wrapped");

+			} else {

+				goto out_child;

+			}

+			if (rewrap_passphrase_if_necessary(wrapped_pw_filename, epd->passphrase, epd->salt)) {

+				/* Non fatal condition. Log a warning. */

+				syslog(LOG_WARNING, "pam_ecryptfs: Unable to rewrap passphrase file\n");

+			}

+			rc = ecryptfs_insert_wrapped_passphrase_into_keyring(

+				auth_tok_sig, wrapped_pw_filename, epd->passphrase,

+				epd->salt);

+			free(wrapped_pw_filename);

+		} else {

+			rc = ecryptfs_add_passphrase_key_to_keyring(

+				auth_tok_sig, epd->passphrase, epd->salt);

+		}

+		if (rc == 1) {

+			goto out_child;

+		}

+		if (rc) {

+			syslog(LOG_ERR, "Error adding passphrase key token to "

+			       "user session keyring; rc = [%d]\n", rc);

+			goto out_child;

+		}

+out_child:

+		free(auth_tok_sig);

+		_exit(0);

+	}

+	tmp_pid = waitpid(child_pid, NULL, 0);

+	if (tmp_pid == -1)

+		syslog(LOG_WARNING,

+		       "waitpid() returned with error condition\n"); 

+out:

+	rc = seteuid(oeuid);

+	rc = setegid(oegid);

+	rc = setgroups(ngids, groups);

+

+outnouid:

+	if (auth_tok_sig != NULL)

+		free(auth_tok_sig);

+  return 0;

+}

+

+

 PAM_EXTERN int

 pam_sm_open_session(pam_handle_t *pamh, int flags,

 		    int argc, const char *argv[])

 {

+	fill_keyring(pamh);

 	mount_private_dir(pamh);

 	return PAM_SUCCESS;

 }