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/*
* PKCS #10
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/pkcs10.h>
#include <botan/x509_ext.h>
#include <botan/x509cert.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/parsing.h>
#include <botan/oids.h>
#include <botan/pem.h>
namespace Botan {
/*
* PKCS10_Request Constructor
*/
PKCS10_Request::PKCS10_Request(DataSource& in) :
X509_Object(in, "CERTIFICATE REQUEST/NEW CERTIFICATE REQUEST")
{
do_decode();
}
/*
* PKCS10_Request Constructor
*/
PKCS10_Request::PKCS10_Request(const std::string& in) :
X509_Object(in, "CERTIFICATE REQUEST/NEW CERTIFICATE REQUEST")
{
do_decode();
}
/*
* Deocde the CertificateRequestInfo
*/
void PKCS10_Request::force_decode()
{
BER_Decoder cert_req_info(tbs_bits);
u32bit version;
cert_req_info.decode(version);
if(version != 0)
throw Decoding_Error("Unknown version code in PKCS #10 request: " +
std::to_string(version));
X509_DN dn_subject;
cert_req_info.decode(dn_subject);
info.add(dn_subject.contents());
BER_Object public_key = cert_req_info.get_next_object();
if(public_key.type_tag != SEQUENCE || public_key.class_tag != CONSTRUCTED)
throw BER_Bad_Tag("PKCS10_Request: Unexpected tag for public key",
public_key.type_tag, public_key.class_tag);
info.add("X509.Certificate.public_key",
PEM_Code::encode(
ASN1::put_in_sequence(public_key.value),
"PUBLIC KEY"
)
);
BER_Object attr_bits = cert_req_info.get_next_object();
if(attr_bits.type_tag == 0 &&
attr_bits.class_tag == ASN1_Tag(CONSTRUCTED | CONTEXT_SPECIFIC))
{
BER_Decoder attributes(attr_bits.value);
while(attributes.more_items())
{
Attribute attr;
attributes.decode(attr);
handle_attribute(attr);
}
attributes.verify_end();
}
else if(attr_bits.type_tag != NO_OBJECT)
throw BER_Bad_Tag("PKCS10_Request: Unexpected tag for attributes",
attr_bits.type_tag, attr_bits.class_tag);
cert_req_info.verify_end();
if(!this->check_signature(subject_public_key()))
throw Decoding_Error("PKCS #10 request: Bad signature detected");
}
/*
* Handle attributes in a PKCS #10 request
*/
void PKCS10_Request::handle_attribute(const Attribute& attr)
{
BER_Decoder value(attr.parameters);
if(attr.oid == OIDS::lookup("PKCS9.EmailAddress"))
{
ASN1_String email;
value.decode(email);
info.add("RFC822", email.value());
}
else if(attr.oid == OIDS::lookup("PKCS9.ChallengePassword"))
{
ASN1_String challenge_password;
value.decode(challenge_password);
info.add("PKCS9.ChallengePassword", challenge_password.value());
}
else if(attr.oid == OIDS::lookup("PKCS9.ExtensionRequest"))
{
Extensions extensions;
value.decode(extensions).verify_end();
Data_Store issuer_info;
extensions.contents_to(info, issuer_info);
}
}
/*
* Return the challenge password (if any)
*/
std::string PKCS10_Request::challenge_password() const
{
return info.get1("PKCS9.ChallengePassword");
}
/*
* Return the name of the requestor
*/
X509_DN PKCS10_Request::subject_dn() const
{
return create_dn(info);
}
/*
* Return the public key of the requestor
*/
MemoryVector<byte> PKCS10_Request::raw_public_key() const
{
DataSource_Memory source(info.get1("X509.Certificate.public_key"));
return PEM_Code::decode_check_label(source, "PUBLIC KEY");
}
/*
* Return the public key of the requestor
*/
Public_Key* PKCS10_Request::subject_public_key() const
{
DataSource_Memory source(info.get1("X509.Certificate.public_key"));
return X509::load_key(source);
}
/*
* Return the alternative names of the requestor
*/
AlternativeName PKCS10_Request::subject_alt_name() const
{
return create_alt_name(info);
}
/*
* Return the key constraints (if any)
*/
Key_Constraints PKCS10_Request::constraints() const
{
return Key_Constraints(info.get1_u32bit("X509v3.KeyUsage", NO_CONSTRAINTS));
}
/*
* Return the extendend key constraints (if any)
*/
std::vector<OID> PKCS10_Request::ex_constraints() const
{
std::vector<std::string> oids = info.get("X509v3.ExtendedKeyUsage");
std::vector<OID> result;
for(size_t i = 0; i != oids.size(); ++i)
result.push_back(OID(oids[i]));
return result;
}
/*
* Return is a CA certificate is requested
*/
bool PKCS10_Request::is_CA() const
{
return (info.get1_u32bit("X509v3.BasicConstraints.is_ca") > 0);
}
/*
* Return the desired path limit (if any)
*/
u32bit PKCS10_Request::path_limit() const
{
return info.get1_u32bit("X509v3.BasicConstraints.path_constraint", 0);
}
}
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