am d45dcbec: Merge change 5615 into donut (7d9e45b2) · Commits · e / os / android_frameworks_base

cmds/keystore/Android.mk

+4 −3

Original line number	Diff line number	Diff line
		@@ -4,13 +4,14 @@ LOCAL_PATH:= $(call my-dir)
		include $(CLEAR_VARS)

		LOCAL_SRC_FILES:= \
		keystore.c commands.c
		netkeystore.c keymgmt.c

		LOCAL_C_INCLUDES := \
		$(call include-path-for, system-core)/cutils
		$(call include-path-for, system-core)/cutils \
		external/openssl/include

		LOCAL_SHARED_LIBRARIES := \
		libcutils
		libcutils libssl

		LOCAL_STATIC_LIBRARIES :=

cmds/keystore/certtool.h

0 → 100644

+83 −0

Original line number	Diff line number	Diff line
		/*
		**
		** Copyright 2009, The Android Open Source Project
		**
		** Licensed under the Apache License, Version 2.0 (the "License");
		** you may not use this file except in compliance with the License.
		** You may obtain a copy of the License at
		**
		** http://www.apache.org/licenses/LICENSE-2.0
		**
		** Unless required by applicable law or agreed to in writing, software
		** distributed under the License is distributed on an "AS IS" BASIS,
		** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		** See the License for the specific language governing permissions and
		** limitations under the License.
		*/

		#ifndef __CERTTOOL_H__
		#define __CERTTOOL_H__

		#include <stdio.h>
		#include <string.h>
		#include <cutils/sockets.h>
		#include <cutils/log.h>

		#include "common.h"
		#include "netkeystore.h"

		/*
		* The specific function 'get_cert' is used in daemons to get the key value
		* from keystore. Caller should allocate the buffer and the length of the buffer
		* should be MAX_KEY_VALUE_LENGTH.
		*/
		static inline int get_cert(char certname, unsigned char value, int *size)
		{
		int count, fd, ret = -1;
		LPC_MARSHAL cmd;
		char delimiter[] = "_";
		char namespace, keyname;
		char *context = NULL;

		if (value == NULL) {
		LOGE("get_cert: value is null\n");
		return -1;
		}

		fd = socket_local_client(SOCKET_PATH,
		ANDROID_SOCKET_NAMESPACE_RESERVED,
		SOCK_STREAM);
		if (fd == -1) {
		LOGE("Keystore service is not up and running.\n");
		return -1;
		}

		cmd.opcode = GET;
		if (((namespace = strtok_r(certname, delimiter, &context)) == NULL) \|\|
		((keyname = strtok_r(NULL, delimiter, &context)) == NULL)) {
		goto err;
		}
		if ((cmd.len = snprintf((char*)cmd.data, BUFFER_MAX, "%s %s", namespace, keyname))
		> (2 * MAX_KEY_NAME_LENGTH + 1)) goto err;

		if (write_marshal(fd, &cmd)) {
		LOGE("Incorrect command or command line is too long.\n");
		goto err;
		}
		if (read_marshal(fd, &cmd)) {
		LOGE("Failed to read the result.\n");
		goto err;
		}

		// copy the result if succeeded.
		if (!cmd.retcode && cmd.len <= BUFFER_MAX) {
		memcpy(value, cmd.data, cmd.len);
		ret = 0;
		*size = cmd.len;
		}
		err:
		close(fd);
		return ret;
		}

		#endif

cmds/keystore/commands.c

deleted100644 → 0

+0 −227

Original line number	Diff line number	Diff line
		/*
		** Copyright 2009, The Android Open Source Project
		**
		** Licensed under the Apache License, Version 2.0 (the "License");
		** you may not use this file except in compliance with the License.
		** You may obtain a copy of the License at
		**
		** http://www.apache.org/licenses/LICENSE-2.0
		**
		** Unless required by applicable law or agreed to in writing, software
		** distributed under the License is distributed on an "AS IS" BASIS,
		** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		** See the License for the specific language governing permissions and
		** limitations under the License.
		*/

		#include "keystore.h"

		static DIR open_keystore(const char dir)
		{
		DIR *d;
		if ((d = opendir(dir)) == NULL) {
		if (mkdir(dir, 0770) < 0) {
		LOGE("cannot create dir '%s': %s\n", dir, strerror(errno));
		unlink(dir);
		return NULL;
		}
		d = open_keystore(dir);
		}
		return d;
		}

		static int list_files(const char *dir, char reply[REPLY_MAX])
		{
		struct dirent *de;
		DIR *d;

		if ((d = open_keystore(dir)) == NULL) {
		return -1;
		}
		reply[0]=0;
		while ((de = readdir(d))) {
		if (de->d_type != DT_DIR) continue;
		if ((strcmp(DOT, de->d_name) == 0) \|\|
		(strcmp(DOTDOT, de->d_name) == 0)) continue;
		if (reply[0] != 0) strlcat(reply, " ", REPLY_MAX);
		if (strlcat(reply, de->d_name, REPLY_MAX) >= REPLY_MAX) {
		LOGE("reply is too long(too many files under '%s'\n", dir);
		return -1;
		}
		}
		closedir(d);
		return 0;
		}

		static int copy_keyfile(const char src, int src_type, const char dstfile) {
		int srcfd = -1, dstfd;
		char buf[REPLY_MAX];

		if ((src_type == IS_FILE) && (srcfd = open(src, O_RDONLY)) == -1) {
		LOGE("Cannot open the original file '%s'\n", src);
		return -1;
		}
		if ((dstfd = open(dstfile, O_CREAT\|O_RDWR)) == -1) {
		LOGE("Cannot open the destination file '%s'\n", dstfile);
		return -1;
		}
		if (src_type == IS_FILE) {
		int length;
		while((length = read(srcfd, buf, REPLY_MAX)) > 0) {
		write(dstfd, buf, length);
		}
		} else {
		write(dstfd, src, strlen(src));
		}
		close(srcfd);
		close(dstfd);
		chmod(dstfile, 0440);
		return 0;
		}

		static int install_key(const char path, const char certname, const char *src,
		int src_is_file, char *dstfile)
		{
		struct dirent *de;
		char fullpath[KEYNAME_LENGTH];
		DIR *d;

		if (snprintf(fullpath, sizeof(fullpath), "%s/%s/", path, certname)
		>= KEYNAME_LENGTH) {
		LOGE("cert name '%s' is too long.\n", certname);
		return -1;
		}

		if ((d = open_keystore(fullpath)) == NULL) {
		LOGE("Can not open the keystore '%s'\n", fullpath);
		return -1;
		}
		closedir(d);
		if (strlcat(fullpath, dstfile, KEYNAME_LENGTH) >= KEYNAME_LENGTH) {
		LOGE("cert name '%s' is too long.\n", certname);
		return -1;
		}
		return copy_keyfile(src, src_is_file, fullpath);
		}

		static int get_key(const char path, const char keyname, const char *file,
		char reply[REPLY_MAX])
		{
		struct dirent *de;
		char filename[KEYNAME_LENGTH];
		int fd;

		if (snprintf(filename, sizeof(filename), "%s/%s/%s", path, keyname, file)
		>= KEYNAME_LENGTH) {
		LOGE("cert name '%s' is too long.\n", keyname);
		return -1;
		}

		if ((fd = open(filename, O_RDONLY)) == -1) {
		return -1;
		}
		close(fd);
		strlcpy(reply, filename, REPLY_MAX);
		return 0;
		}

		static int remove_key(const char dir, const char key)
		{
		char dstfile[KEYNAME_LENGTH];
		char *keyfile[4] = { USER_KEY, USER_P12_CERT, USER_CERTIFICATE,
		CA_CERTIFICATE };
		int i, count = 0;

		for ( i = 0 ; i < 4 ; i++) {
		if (snprintf(dstfile, KEYNAME_LENGTH, "%s/%s/%s", dir, key, keyfile[i])
		>= KEYNAME_LENGTH) {
		LOGE("keyname is too long '%s'\n", key);
		return -1;
		}
		if (unlink(dstfile) == 0) count++;
		}

		if (count == 0) {
		LOGE("can not clean up '%s' keys or not exist\n", key);
		return -1;
		}

		snprintf(dstfile, KEYNAME_LENGTH, "%s/%s", dir, key);
		if (rmdir(dstfile)) {
		LOGE("can not clean up '%s' directory\n", key);
		return -1;
		}
		return 0;
		}

		int list_user_certs(char reply[REPLY_MAX])
		{
		return list_files(CERTS_DIR, reply);
		}

		int list_ca_certs(char reply[REPLY_MAX])
		{
		return list_files(CACERTS_DIR, reply);
		}

		int install_user_cert(const char keyname, const char cert, const char *key)
		{
		if (install_key(CERTS_DIR, keyname, cert, IS_FILE, USER_CERTIFICATE) == 0) {
		return install_key(CERTS_DIR, keyname, key, IS_FILE, USER_KEY);
		}
		return -1;
		}

		int install_ca_cert(const char keyname, const char certfile)
		{
		return install_key(CACERTS_DIR, keyname, certfile, IS_FILE, CA_CERTIFICATE);
		}

		int install_p12_cert(const char keyname, const char certfile)
		{
		return install_key(CERTS_DIR, keyname, certfile, IS_FILE, USER_P12_CERT);
		}

		int add_ca_cert(const char keyname, const char certificate)
		{
		return install_key(CACERTS_DIR, keyname, certificate, IS_CONTENT,
		CA_CERTIFICATE);
		}

		int add_user_cert(const char keyname, const char certificate)
		{
		return install_key(CERTS_DIR, keyname, certificate, IS_CONTENT,
		USER_CERTIFICATE);
		}

		int add_user_key(const char keyname, const char key)
		{
		return install_key(CERTS_DIR, keyname, key, IS_CONTENT, USER_KEY);
		}

		int get_ca_cert(const char *keyname, char reply[REPLY_MAX])
		{
		return get_key(CACERTS_DIR, keyname, CA_CERTIFICATE, reply);
		}

		int get_user_cert(const char *keyname, char reply[REPLY_MAX])
		{
		return get_key(CERTS_DIR, keyname, USER_CERTIFICATE, reply);
		}

		int get_user_key(const char *keyname, char reply[REPLY_MAX])
		{
		if(get_key(CERTS_DIR, keyname, USER_KEY, reply))
		return get_key(CERTS_DIR, keyname, USER_P12_CERT, reply);
		return 0;
		}

		int remove_user_cert(const char *key)
		{
		return remove_key(CERTS_DIR, key);
		}

		int remove_ca_cert(const char *key)
		{
		return remove_key(CACERTS_DIR, key);
		}

cmds/keystore/common.h

0 → 100644

+60 −0

Original line number	Diff line number	Diff line
		/*
		**
		** Copyright 2009, The Android Open Source Project
		**
		** Licensed under the Apache License, Version 2.0 (the "License");
		** you may not use this file except in compliance with the License.
		** You may obtain a copy of the License at
		**
		** http://www.apache.org/licenses/LICENSE-2.0
		**
		** Unless required by applicable law or agreed to in writing, software
		** distributed under the License is distributed on an "AS IS" BASIS,
		** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		** See the License for the specific language governing permissions and
		** limitations under the License.
		*/

		#ifndef __COMMON_H__
		#define __COMMON_H__

		#define SOCKET_PATH "keystore"
		#define KEYSTORE_DIR "/data/misc/keystore/"

		#define READ_TIMEOUT 3
		#define MAX_KEY_NAME_LENGTH 64
		#define MAX_NAMESPACE_LENGTH MAX_KEY_NAME_LENGTH
		#define MAX_KEY_VALUE_LENGTH 4096

		#define BUFFER_MAX MAX_KEY_VALUE_LENGTH

		typedef enum {
		BOOTUP,
		UNINITIALIZED,
		LOCKED,
		UNLOCKED,
		} KEYSTORE_STATE;

		typedef enum {
		LOCK,
		UNLOCK,
		PASSWD,
		GETSTATE,
		LISTKEYS,
		GET,
		PUT,
		REMOVE,
		RESET,
		MAX_OPCODE
		} KEYSTORE_OPCODE;

		typedef struct {
		uint32_t len;
		union {
		uint32_t opcode;
		uint32_t retcode;
		};
		unsigned char data[BUFFER_MAX + 1];
		} LPC_MARSHAL;

		#endif

cmds/keystore/keymgmt.c

0 → 100644

+365 −0

Original line number	Diff line number	Diff line
		/*
		** Copyright 2009, The Android Open Source Project
		**
		** Licensed under the Apache License, Version 2.0 (the "License");
		** you may not use this file except in compliance with the License.
		** You may obtain a copy of the License at
		**
		** http://www.apache.org/licenses/LICENSE-2.0
		**
		** Unless required by applicable law or agreed to in writing, software
		** distributed under the License is distributed on an "AS IS" BASIS,
		** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		** See the License for the specific language governing permissions and
		** limitations under the License.
		*/

		#include <stdio.h>
		#include <stdlib.h>
		#include <string.h>
		#include <sys/stat.h>
		#include <sys/types.h>
		#include <ctype.h>
		#include <fcntl.h>
		#include <dirent.h>
		#include <errno.h>
		#include <openssl/aes.h>
		#include <openssl/evp.h>
		#include <cutils/log.h>

		#include "common.h"
		#include "keymgmt.h"

		static int retry_count = 0;
		static unsigned char iv[IV_LEN];
		static KEYSTORE_STATE state = BOOTUP;
		static AES_KEY encryptKey, decryptKey;

		inline void unlock_keystore(unsigned char *master_key)
		{
		AES_set_encrypt_key(master_key, AES_KEY_LEN, &encryptKey);
		AES_set_decrypt_key(master_key, AES_KEY_LEN, &decryptKey);
		memset(master_key, 0, sizeof(master_key));
		state = UNLOCKED;
		}

		inline void lock_keystore()
		{
		memset(&encryptKey, 0 , sizeof(AES_KEY));
		memset(&decryptKey, 0 , sizeof(AES_KEY));
		state = LOCKED;
		}

		inline void get_encrypt_key(char passwd, AES_KEY key)
		{
		unsigned char user_key[USER_KEY_LEN];
		gen_key(passwd, user_key, USER_KEY_LEN);
		AES_set_encrypt_key(user_key, AES_KEY_LEN, key);
		}

		inline void get_decrypt_key(char passwd, AES_KEY key)
		{
		unsigned char user_key[USER_KEY_LEN];
		gen_key(passwd, user_key, USER_KEY_LEN);
		AES_set_decrypt_key(user_key, AES_KEY_LEN, key);
		}

		static int gen_random_blob(unsigned char *key, int size)
		{
		int ret = 0;
		int fd = open("/dev/urandom", O_RDONLY);
		if (fd == -1) return -1;
		if (read(fd, key, size) != size) ret = -1;
		close(fd);
		return ret;
		}

		static int encrypt_n_save(AES_KEY enc_key, DATA_BLOB blob,
		const char *keyfile)
		{
		int size, fd, ret = -1;
		unsigned char enc_blob[MAX_BLOB_LEN];

		char tmpfile[KEYFILE_LEN];
		strcpy(tmpfile, keyfile);
		strcat(tmpfile, ".tmp");

		// prepare the blob
		memcpy(blob->iv, iv, IV_LEN);
		blob->blob_size = get_blob_size(blob);
		memcpy(enc_blob, blob->blob, blob->blob_size);
		AES_cbc_encrypt((unsigned char )enc_blob, (unsigned char )blob->blob,
		blob->blob_size, enc_key, iv, AES_ENCRYPT);
		// write to keyfile
		size = data_blob_size(blob);
		if ((fd = open(tmpfile, O_CREAT\|O_RDWR)) == -1) return -1;
		if (write(fd, blob, size) == size) ret = 0;
		close(fd);
		if (!ret) {
		unlink(keyfile);
		rename(tmpfile, keyfile);
		chmod(keyfile, 0440);
		}
		return ret;
		}

		static int load_n_decrypt(const char keyname, const char keyfile,
		AES_KEY key, DATA_BLOB blob)
		{
		int fd, ret = -1;
		if ((fd = open(keyfile, O_RDONLY)) == -1) return -1;
		// get the encrypted blob and iv
		if ((read(fd, blob->iv, sizeof(blob->iv)) != sizeof(blob->iv)) \|\|
		(read(fd, &blob->blob_size, sizeof(uint32_t)) != sizeof(uint32_t)) \|\|
		(blob->blob_size > MAX_BLOB_LEN)) {
		goto err;
		} else {
		unsigned char enc_blob[MAX_BLOB_LEN];
		if (read(fd, enc_blob, blob->blob_size) !=
		(int) blob->blob_size) goto err;
		// decrypt the blob
		AES_cbc_encrypt((unsigned char )enc_blob, (unsigned char)blob->blob,
		blob->blob_size, key, blob->iv, AES_DECRYPT);
		if (strcmp(keyname, (char*)blob->keyname) == 0) ret = 0;
		}
		err:
		close(fd);
		return ret;
		}

		static int store_master_key(char upasswd, unsigned char master_key)
		{
		AES_KEY key;
		DATA_BLOB blob;

		// prepare the blob
		strlcpy(blob.keyname, MASTER_KEY_TAG, USER_KEY_LEN);
		blob.value_size = USER_KEY_LEN;
		memcpy((void)blob.value, (const void)master_key, USER_KEY_LEN);

		// generate the encryption key
		get_encrypt_key(upasswd, &key);
		return encrypt_n_save(&key, &blob, MASTER_KEY);
		}

		static int get_master_key(char upasswd, unsigned char master_key)
		{
		AES_KEY key;
		int size, ret = 0;
		DATA_BLOB blob;

		get_decrypt_key(upasswd, &key);
		ret = load_n_decrypt(MASTER_KEY_TAG, MASTER_KEY, &key, &blob);
		if (!ret) memcpy(master_key, blob.value, blob.value_size);
		return ret;
		}

		static int create_master_key(char *upasswd)
		{
		int ret;
		unsigned char mpasswd[AES_KEY_LEN];
		unsigned char master_key[USER_KEY_LEN];

		gen_random_blob(mpasswd, AES_KEY_LEN);
		gen_key((char*)mpasswd, master_key, USER_KEY_LEN);
		if ((ret = store_master_key(upasswd, master_key)) == 0) {
		unlock_keystore(master_key);
		}
		memset(master_key, 0, USER_KEY_LEN);
		memset(mpasswd, 0, AES_KEY_LEN);

		return ret;
		}

		static int change_passwd(char *data)
		{
		unsigned char master_key[USER_KEY_LEN];
		char old_pass, new_pass = NULL, p, delimiter=" ";
		int ret, count = 0;
		char *context = NULL;

		old_pass = p = strtok_r(data, delimiter, &context);
		while (p != NULL) {
		count++;
		new_pass = p;
		p = strtok_r(NULL, delimiter, &context);
		}
		if (count != 2) return -1;
		if ((ret = get_master_key(old_pass, master_key)) == 0) {
		ret = store_master_key(new_pass, master_key);
		retry_count = 0;
		} else {
		ret = MAX_RETRY_COUNT - ++retry_count;
		if (ret == 0) {
		retry_count = 0;
		LOGE("passwd:reach max retry count, reset the keystore now.");
		reset_keystore();
		return -1;
		}

		}
		return ret;
		}

		int remove_key(const char namespace, const char keyname)
		{
		char keyfile[KEYFILE_LEN];

		if (state != UNLOCKED) return -state;
		sprintf(keyfile, KEYFILE_NAME, namespace, keyname);
		return unlink(keyfile);
		}

		int put_key(const char namespace, const char keyname,
		unsigned char *data, int size)
		{
		DATA_BLOB blob;
		uint32_t real_size;
		char keyfile[KEYFILE_LEN];

		if (state != UNLOCKED) {
		LOGE("Can not store key with current state %d\n", state);
		return -state;
		}
		sprintf(keyfile, KEYFILE_NAME, namespace, keyname);
		// flatten the args
		strcpy(blob.keyname, keyname);
		blob.value_size = size;
		memcpy(blob.value, data, size);
		return encrypt_n_save(&encryptKey, &blob, keyfile);
		}

		int get_key(const char namespace, const char keyname,
		unsigned char data, int size)
		{
		int ret;
		DATA_BLOB blob;
		uint32_t blob_size;
		char keyfile[KEYFILE_LEN];

		if (state != UNLOCKED) {
		LOGE("Can not retrieve key value with current state %d\n", state);
		return -state;
		}
		sprintf(keyfile, KEYFILE_NAME, namespace, keyname);
		ret = load_n_decrypt(keyname, keyfile, &decryptKey, &blob);
		if (!ret) {
		if ((blob.value_size > MAX_KEY_VALUE_LENGTH)) {
		ret = -1;
		} else {
		*size = blob.value_size;
		memcpy(data, blob.value, *size);
		}
		}
		return ret;
		}

		int list_keys(const char *namespace, char reply[BUFFER_MAX])
		{
		DIR *d;
		struct dirent *de;

		if (!namespace \|\| ((d = opendir("."))) == NULL) {
		LOGE("cannot open keystore dir or namespace is null\n");
		return -1;
		}
		while ((de = readdir(d))) {
		char prefix, name, *keyfile = de->d_name;
		char *context = NULL;

		if (de->d_type != DT_REG) continue;
		if ((prefix = strtok_r(keyfile, NAME_DELIMITER, &context))
		== NULL) continue;
		if (strcmp(prefix, namespace)) continue;
		if ((name = strtok_r(NULL, NAME_DELIMITER, &context)) == NULL) continue;
		// append the key name into reply
		if (reply[0] != 0) strlcat(reply, " ", BUFFER_MAX);
		if (strlcat(reply, name, BUFFER_MAX) >= BUFFER_MAX) {
		LOGE("too many files under keystore directory\n");
		return -1;
		}
		}
		closedir(d);
		return 0;
		}

		int passwd(char *data)
		{
		if (state == UNINITIALIZED) {
		if (strchr(data, ' ')) return -1;
		return create_master_key(data);
		}
		return change_passwd(data);
		}

		int lock()
		{
		switch(state) {
		case UNLOCKED:
		lock_keystore();
		case LOCKED:
		return 0;
		default:
		return -1;
		}
		}

		int unlock(char *passwd)
		{
		unsigned char master_key[USER_KEY_LEN];
		int ret = get_master_key(passwd, master_key);
		if (!ret) {
		unlock_keystore(master_key);
		retry_count = 0;
		} else {
		ret = MAX_RETRY_COUNT - ++retry_count;
		if (ret == 0) {
		retry_count = 0;
		LOGE("unlock:reach max retry count, reset the keystore now.");
		reset_keystore();
		return -1;
		}
		}
		return ret;
		}

		KEYSTORE_STATE get_state()
		{
		return state;
		}

		int reset_keystore()
		{
		DIR *d;
		struct dirent *de;

		if ((d = opendir(".")) == NULL) {
		LOGE("cannot open keystore dir\n");
		return -1;
		}
		while ((de = readdir(d))) unlink(de->d_name);
		closedir(d);
		state = UNINITIALIZED;
		LOGI("keystore is reset.");
		return 0;
		}

		int init_keystore(const char *dir)
		{
		int fd;

		if (!dir) mkdir(dir, 0770);
		if (!dir \|\| chdir(dir)) {
		LOGE("Can not open/create the keystore directory %s\n",
		dir ? dir : "(null)");
		return -1;
		}
		gen_random_blob(iv, IV_LEN);
		if ((fd = open(MASTER_KEY, O_RDONLY)) == -1) {
		state = UNINITIALIZED;
		return 0;
		}
		close(fd);
		state = LOCKED;
		return 0;
		}