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/*************************************************
* X.509 Certificate Extensions Header File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#ifndef BOTAN_X509_EXTENSIONS__
#define BOTAN_X509_EXTENSIONS__
#include <botan/asn1_int.h>
#include <botan/asn1_oid.h>
#include <botan/asn1_obj.h>
#include <botan/datastor.h>
#include <botan/enums.h>
namespace Botan {
/*************************************************
* X.509 Certificate Extension *
*************************************************/
class Certificate_Extension
{
public:
void maybe_add(class DER_Encoder&) const;
OID oid_of() const;
void make_critical() { critical = true; }
bool is_critical() const { return critical; }
virtual void contents_to(Data_Store&, Data_Store&) const = 0;
virtual std::string config_id() const = 0;
virtual std::string oid_name() const = 0;
Certificate_Extension() { critical = false; }
virtual ~Certificate_Extension() {}
protected:
friend class Extensions;
virtual bool should_encode() const { return true; }
virtual MemoryVector<byte> encode_inner() const = 0;
virtual void decode_inner(const MemoryRegion<byte>&) = 0;
private:
bool critical;
};
/*************************************************
* X.509 Certificate Extension List *
*************************************************/
class Extensions : public ASN1_Object
{
public:
void encode_into(class DER_Encoder&) const;
void decode_from(class BER_Decoder&);
std::vector<Certificate_Extension*> get() const
{ return extensions; }
void add(Certificate_Extension* extn)
{ extensions.push_back(extn); }
~Extensions();
private:
std::vector<Certificate_Extension*> extensions;
};
namespace Cert_Extension {
/*************************************************
* Basic Constraints Extension *
*************************************************/
class Basic_Constraints : public Certificate_Extension
{
public:
Basic_Constraints(bool ca = false, u32bit limit = 0) :
is_ca(ca), path_limit(limit) {}
private:
std::string config_id() const { return "basic_constraints"; }
std::string oid_name() const { return "X509v3.BasicConstraints"; }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
bool is_ca;
u32bit path_limit;
};
/*************************************************
* Key Usage Constraints Extension *
*************************************************/
class Key_Usage : public Certificate_Extension
{
public:
Key_Usage(Key_Constraints c = NO_CONSTRAINTS) : constraints(c) {}
private:
std::string config_id() const { return "key_usage"; }
std::string oid_name() const { return "X509v3.KeyUsage"; }
bool should_encode() const { return (constraints != NO_CONSTRAINTS); }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
Key_Constraints constraints;
};
/*************************************************
* Subject Key Identifier Extension *
*************************************************/
class Subject_Key_ID : public Certificate_Extension
{
public:
Subject_Key_ID() {}
Subject_Key_ID(const MemoryRegion<byte>&);
private:
std::string config_id() const { return "subject_key_id"; }
std::string oid_name() const { return "X509v3.SubjectKeyIdentifier"; }
bool should_encode() const { return (key_id.size() > 0); }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
MemoryVector<byte> key_id;
};
/*************************************************
* Authority Key Identifier Extension *
*************************************************/
class Authority_Key_ID : public Certificate_Extension
{
public:
Authority_Key_ID() {}
Authority_Key_ID(const MemoryRegion<byte>& k) : key_id(k) {}
private:
std::string config_id() const { return "authority_key_id"; }
std::string oid_name() const { return "X509v3.AuthorityKeyIdentifier"; }
bool should_encode() const { return (key_id.size() > 0); }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
MemoryVector<byte> key_id;
};
/*************************************************
* Alternative Name Extension *
*************************************************/
class Alternative_Name : public Certificate_Extension
{
public:
Alternative_Name(const AlternativeName&,
const std::string&, const std::string&);
private:
std::string config_id() const { return config_name_str; }
std::string oid_name() const { return oid_name_str; }
bool should_encode() const { return alt_name.has_items(); }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
std::string config_name_str, oid_name_str;
AlternativeName alt_name;
};
/*************************************************
* Extended Key Usage Extension *
*************************************************/
class Extended_Key_Usage : public Certificate_Extension
{
public:
Extended_Key_Usage() {}
Extended_Key_Usage(const std::vector<OID>& o) : oids(o) {}
private:
std::string config_id() const { return "extended_key_usage"; }
std::string oid_name() const { return "X509v3.ExtendedKeyUsage"; }
bool should_encode() const { return (oids.size() > 0); }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
std::vector<OID> oids;
};
/*************************************************
* Certificate Policies Extension *
*************************************************/
class Certificate_Policies : public Certificate_Extension
{
public:
Certificate_Policies() {}
Certificate_Policies(const std::vector<OID>& o) : oids(o) {}
private:
std::string config_id() const { return "policy_info"; }
std::string oid_name() const { return "X509v3.CertificatePolicies"; }
bool should_encode() const { return (oids.size() > 0); }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
std::vector<OID> oids;
};
/*************************************************
* CRL Number Extension *
*************************************************/
class CRL_Number : public Certificate_Extension
{
public:
CRL_Number() : has_value(false) {}
CRL_Number(u32bit n) : has_value(true), crl_number(n) {}
private:
std::string config_id() const { return "crl_number"; }
std::string oid_name() const { return "X509v3.CRLNumber"; }
bool should_encode() const { return has_value; }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
bool has_value;
u32bit crl_number;
};
/*************************************************
* CRL Entry Reason Code Extension *
*************************************************/
class CRL_ReasonCode : public Certificate_Extension
{
public:
CRL_ReasonCode(CRL_Code r = UNSPECIFIED) : reason(r) {}
private:
std::string config_id() const { return "crl_reason"; }
std::string oid_name() const { return "X509v3.ReasonCode"; }
bool should_encode() const { return (reason != UNSPECIFIED); }
MemoryVector<byte> encode_inner() const;
void decode_inner(const MemoryRegion<byte>&);
void contents_to(Data_Store&, Data_Store&) const;
CRL_Code reason;
};
}
}
#endif
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