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/*
* PKCS #10
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/pkcs10.h>
#include <botan/x509_ext.h>
#include <botan/x509cert.h>
#include <botan/ber_dec.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();
}
#if defined(BOTAN_TARGET_OS_HAS_FILESYSTEM)
/*
* PKCS10_Request Constructor
*/
PKCS10_Request::PKCS10_Request(const std::string& fsname) :
X509_Object(fsname, "CERTIFICATE REQUEST/NEW CERTIFICATE REQUEST")
{
do_decode();
}
#endif
/*
* PKCS10_Request Constructor
*/
PKCS10_Request::PKCS10_Request(const std::vector<uint8_t>& in) :
X509_Object(in, "CERTIFICATE REQUEST/NEW CERTIFICATE REQUEST")
{
do_decode();
}
/*
* Decode the CertificateRequestInfo
*/
void PKCS10_Request::force_decode()
{
BER_Decoder cert_req_info(signed_body());
size_t 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);
m_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);
m_info.add("X509.Certificate.public_key",
PEM_Code::encode(
ASN1::put_in_sequence(unlock(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);
m_info.add("RFC822", email.value());
}
else if(attr.oid == OIDS::lookup("PKCS9.ChallengePassword"))
{
ASN1_String challenge_password;
value.decode(challenge_password);
m_info.add("PKCS9.ChallengePassword", challenge_password.value());
}
else if(attr.oid == OIDS::lookup("PKCS9.ExtensionRequest"))
{
value.decode(m_extensions).verify_end();
}
}
/*
* Return the challenge password (if any)
*/
std::string PKCS10_Request::challenge_password() const
{
return m_info.get1("PKCS9.ChallengePassword");
}
/*
* Return the name of the requestor
*/
X509_DN PKCS10_Request::subject_dn() const
{
return create_dn(m_info);
}
/*
* Return the public key of the requestor
*/
std::vector<uint8_t> PKCS10_Request::raw_public_key() const
{
DataSource_Memory source(m_info.get1("X509.Certificate.public_key"));
return unlock(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(m_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(m_info);
}
/*
* Return the key constraints (if any)
*/
Key_Constraints PKCS10_Request::constraints() const
{
if(auto ext = m_extensions.get(OIDS::lookup("X509v3.KeyUsage")))
{
return dynamic_cast<Cert_Extension::Key_Usage&>(*ext).get_constraints();
}
return NO_CONSTRAINTS;
}
/*
* Return the extendend key constraints (if any)
*/
std::vector<OID> PKCS10_Request::ex_constraints() const
{
if(auto ext = m_extensions.get(OIDS::lookup("X509v3.ExtendedKeyUsage")))
{
return dynamic_cast<Cert_Extension::Extended_Key_Usage&>(*ext).get_oids();
}
return {};
}
/*
* Return is a CA certificate is requested
*/
bool PKCS10_Request::is_CA() const
{
if(auto ext = m_extensions.get(OIDS::lookup("X509v3.BasicConstraints")))
{
return dynamic_cast<Cert_Extension::Basic_Constraints&>(*ext).get_is_ca();
}
return false;
}
/*
* Return the desired path limit (if any)
*/
size_t PKCS10_Request::path_limit() const
{
if(auto ext = m_extensions.get(OIDS::lookup("X509v3.BasicConstraints")))
{
Cert_Extension::Basic_Constraints& basic_constraints = dynamic_cast<Cert_Extension::Basic_Constraints&>(*ext);
if(basic_constraints.get_is_ca())
{
return basic_constraints.get_path_limit();
}
}
return 0;
}
/*
* Return the X509v3 extensions
*/
Extensions PKCS10_Request::extensions() const
{
return m_extensions;
}
}
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