82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
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/*
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** Copyright 2009, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#ifndef __KEYMGMT_H__
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#define __KEYMGMT_H__
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#define MASTER_KEY_TAG "master_key"
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#define MASTER_KEY ".keymaster"
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#define MAX_PATH_LEN 128
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#define SALT "Android Keystore 0.1"
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#define NAME_DELIMITER "_"
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#define KEYFILE_NAME "%s"NAME_DELIMITER"%s"
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#define KEYGEN_ITER 1024
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#define AES_KEY_LEN 128
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#define USER_KEY_LEN (AES_KEY_LEN/8)
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#define IV_LEN USER_KEY_LEN
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#define MAX_RETRY_COUNT 6
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#define gen_key(passwd, key, len) \
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PKCS5_PBKDF2_HMAC_SHA1(passwd, strlen(passwd), \
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(unsigned char*)SALT, \
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strlen(SALT), KEYGEN_ITER, \
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len, key)
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#define KEYFILE_LEN MAX_NAMESPACE_LENGTH + MAX_KEY_NAME_LENGTH + 6
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#define get_blob_size(blob) \
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(((blob->value_size + sizeof(uint32_t) + MAX_KEY_NAME_LENGTH \
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+ USER_KEY_LEN - 1) / USER_KEY_LEN) * USER_KEY_LEN)
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#define MAX_BLOB_LEN ((MAX_KEY_VALUE_LENGTH + MAX_KEY_NAME_LENGTH + \
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sizeof(uint32_t) + USER_KEY_LEN - 1) / USER_KEY_LEN)\
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* USER_KEY_LEN
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#define data_blob_size(blob) USER_KEY_LEN + sizeof(uint32_t) + blob->blob_size
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typedef struct {
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unsigned char iv[USER_KEY_LEN];
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uint32_t blob_size;
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union {
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unsigned char blob[1];
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struct {
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uint32_t value_size;
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char keyname[MAX_KEY_NAME_LENGTH];
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unsigned char value[MAX_KEY_VALUE_LENGTH];
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} __attribute__((packed));
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};
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} DATA_BLOB;
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typedef struct {
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char tag[USER_KEY_LEN];
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unsigned char master_key[USER_KEY_LEN];
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} MASTER_BLOB;
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int put_key(const char *namespace, const char *keyname,
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unsigned char *data, int size);
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int get_key(const char *namespace, const char *keyname,
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unsigned char *data, int *size);
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int remove_key(const char *namespace, const char *keyname);
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int list_keys(const char *namespace, char reply[BUFFER_MAX]);
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int passwd(char *data);
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int lock();
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int unlock(char *passwd);
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KEYSTORE_STATE get_state();
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int reset_keystore();
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int init_keystore(const char *dir);
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#endif
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