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// -*- mode:C; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2009 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef CEPH_AUTH_CRYPTO_H
#define CEPH_AUTH_CRYPTO_H
#include "include/types.h"
#include <string>
#include "include/utime.h"
class CephContext;
class CryptoHandler;
/*
* match encoding of struct ceph_secret
*/
class CryptoKey {
protected:
__u16 type;
utime_t created;
bufferptr secret;
// cache a pointer to the handler, so we don't have to look it up
// for each crypto operation
mutable CryptoHandler *ch;
public:
CryptoKey() : type(0), ch(NULL) { }
CryptoKey(int t, utime_t c, bufferptr& s) : type(t), created(c), secret(s), ch(NULL) { }
void encode(bufferlist& bl) const {
::encode(type, bl);
::encode(created, bl);
__u16 len = secret.length();
::encode(len, bl);
bl.append(secret);
}
void decode(bufferlist::iterator& bl) {
::decode(type, bl);
::decode(created, bl);
__u16 len;
::decode(len, bl);
bl.copy(len, secret);
secret.c_str(); // make sure it's a single buffer!
}
int get_type() const { return type; }
utime_t get_created() const { return created; }
void print(std::ostream& out) const;
int set_secret(CephContext *cct, int type, bufferptr& s);
bufferptr& get_secret() { return secret; }
const bufferptr& get_secret() const { return secret; }
void encode_base64(string& s) const {
bufferlist bl;
encode(bl);
bufferlist e;
bl.encode_base64(e);
e.append('\0');
s = e.c_str();
}
void decode_base64(const string& s) {
bufferlist e;
e.append(s);
bufferlist bl;
bl.decode_base64(e);
bufferlist::iterator p = bl.begin();
decode(p);
}
// --
int create(CephContext *cct, int type);
void encrypt(CephContext *cct, const bufferlist& in, bufferlist& out, std::string &error) const;
void decrypt(CephContext *cct, const bufferlist& in, bufferlist& out, std::string &error) const;
void to_str(std::string& s) const;
};
WRITE_CLASS_ENCODER(CryptoKey);
static inline ostream& operator<<(ostream& out, const CryptoKey& k)
{
k.print(out);
return out;
}
/*
* Driver for a particular algorithm
*
* To use these functions, you need to call ceph::crypto::init(), see
* common/ceph_crypto.h. common_init_finish does this for you.
*/
class CryptoHandler {
public:
virtual ~CryptoHandler() {}
virtual int get_type() const = 0;
virtual int create(bufferptr& secret) = 0;
virtual int validate_secret(bufferptr& secret) = 0;
virtual void encrypt(const bufferptr& secret, const bufferlist& in,
bufferlist& out, std::string &error) const = 0;
virtual void decrypt(const bufferptr& secret, const bufferlist& in,
bufferlist& out, std::string &error) const = 0;
};
extern int get_random_bytes(char *buf, int len);
extern uint64_t get_random(uint64_t min_val, uint64_t max_val);
class CryptoNone : public CryptoHandler {
public:
CryptoNone() { }
~CryptoNone() {}
int get_type() const {
return CEPH_CRYPTO_NONE;
}
int create(bufferptr& secret);
int validate_secret(bufferptr& secret);
void encrypt(const bufferptr& secret, const bufferlist& in,
bufferlist& out, std::string &error) const;
void decrypt(const bufferptr& secret, const bufferlist& in,
bufferlist& out, std::string &error) const;
};
class CryptoAES : public CryptoHandler {
public:
CryptoAES() { }
~CryptoAES() {}
int get_type() const {
return CEPH_CRYPTO_AES;
}
int create(bufferptr& secret);
int validate_secret(bufferptr& secret);
void encrypt(const bufferptr& secret, const bufferlist& in,
bufferlist& out, std::string &error) const;
void decrypt(const bufferptr& secret, const bufferlist& in,
bufferlist& out, std::string &error) const;
};
#endif
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