/*
* Load the certificate and private key
*/
X509_CA::X509_CA(const X509_Certificate& c,
const Private_Key& key,
const std::string& hash_fn) : m_cert(c)
{
if(!m_cert.is_CA_cert())
throw Invalid_Argument("X509_CA: This certificate is not for a CA");
m_signer = choose_sig_format(key, hash_fn, m_ca_sig_algo);
}
/*
* Create a new self-signed X.509 certificate
*/
X509_Certificate create_self_signed_cert(const X509_Cert_Options& opts,
const Private_Key& key,
const std::string& hash_fn,
RandomNumberGenerator& rng)
{
AlgorithmIdentifier sig_algo;
X509_DN subject_dn;
AlternativeName subject_alt;
// for now, only the padding option is used
std::map<std::string,std::string> sig_opts = { {"padding",opts.padding_scheme} };
const std::vector<uint8_t> pub_key = X509::BER_encode(key);
std::unique_ptr<PK_Signer> signer(choose_sig_format(key, sig_opts, rng, hash_fn, sig_algo));
load_info(opts, subject_dn, subject_alt);
Extensions extensions = opts.extensions;
Key_Constraints constraints;
if(opts.is_CA)
{
constraints = Key_Constraints(KEY_CERT_SIGN | CRL_SIGN);
}
else
{
verify_cert_constraints_valid_for_key_type(key, opts.constraints);
constraints = opts.constraints;
}
extensions.add_new(
new Cert_Extension::Basic_Constraints(opts.is_CA, opts.path_limit),
true);
if(constraints != NO_CONSTRAINTS)
{
extensions.add_new(new Cert_Extension::Key_Usage(constraints), true);
}
std::unique_ptr<Cert_Extension::Subject_Key_ID> skid(new Cert_Extension::Subject_Key_ID(pub_key, hash_fn));
extensions.add_new(new Cert_Extension::Authority_Key_ID(skid->get_key_id()));
extensions.add_new(skid.release());
extensions.add_new(
new Cert_Extension::Subject_Alternative_Name(subject_alt));
extensions.add_new(
new Cert_Extension::Extended_Key_Usage(opts.ex_constraints));
return X509_CA::make_cert(signer.get(), rng, sig_algo, pub_key,
opts.start, opts.end,
subject_dn, subject_dn,
extensions);
}
/*
* Create a new self-signed X.509 certificate
*/
X509_Certificate create_self_signed_cert(const X509_Cert_Options& opts,
const Private_Key& key,
const std::string& hash_fn,
RandomNumberGenerator& rng)
{
AlgorithmIdentifier sig_algo;
X509_DN subject_dn;
AlternativeName subject_alt;
std::vector<byte> pub_key = X509::BER_encode(key);
std::unique_ptr<PK_Signer> signer(choose_sig_format(key, hash_fn, sig_algo));
load_info(opts, subject_dn, subject_alt);
Key_Constraints constraints;
if(opts.is_CA)
{
constraints = Key_Constraints(KEY_CERT_SIGN | CRL_SIGN);
}
else
{
verify_cert_constraints_valid_for_key_type(key, opts.constraints);
constraints = opts.constraints;
}
Extensions extensions;
extensions.add(
new Cert_Extension::Basic_Constraints(opts.is_CA, opts.path_limit),
true);
if(constraints != NO_CONSTRAINTS)
{
extensions.add(new Cert_Extension::Key_Usage(constraints), true);
}
extensions.add(new Cert_Extension::Subject_Key_ID(pub_key));
extensions.add(
new Cert_Extension::Subject_Alternative_Name(subject_alt));
extensions.add(
new Cert_Extension::Extended_Key_Usage(opts.ex_constraints));
return X509_CA::make_cert(signer.get(), rng, sig_algo, pub_key,
opts.start, opts.end,
subject_dn, subject_dn,
extensions);
}
/*
* Create a PKCS #10 certificate request
*/
PKCS10_Request create_cert_req(const X509_Cert_Options& opts,
const Private_Key& key,
const std::string& hash_fn,
RandomNumberGenerator& rng)
{
AlgorithmIdentifier sig_algo;
X509_DN subject_dn;
AlternativeName subject_alt;
opts.sanity_check();
std::vector<byte> pub_key = X509::BER_encode(key);
std::unique_ptr<PK_Signer> signer(choose_sig_format(key, hash_fn, sig_algo));
load_info(opts, subject_dn, subject_alt);
const size_t PKCS10_VERSION = 0;
Extensions extensions;
extensions.add(
new Cert_Extension::Basic_Constraints(opts.is_CA, opts.path_limit));
extensions.add(
new Cert_Extension::Key_Usage(
opts.is_CA ? Key_Constraints(KEY_CERT_SIGN | CRL_SIGN) :
find_constraints(key, opts.constraints)
)
);
extensions.add(
new Cert_Extension::Extended_Key_Usage(opts.ex_constraints));
extensions.add(
new Cert_Extension::Subject_Alternative_Name(subject_alt));
DER_Encoder tbs_req;
tbs_req.start_cons(SEQUENCE)
.encode(PKCS10_VERSION)
.encode(subject_dn)
.raw_bytes(pub_key)
.start_explicit(0);
if(opts.challenge != "")
{
ASN1_String challenge(opts.challenge, DIRECTORY_STRING);
tbs_req.encode(
Attribute("PKCS9.ChallengePassword",
DER_Encoder().encode(challenge).get_contents_unlocked()
)
);
}
tbs_req.encode(
Attribute("PKCS9.ExtensionRequest",
DER_Encoder()
.start_cons(SEQUENCE)
.encode(extensions)
.end_cons()
.get_contents_unlocked()
)
)
.end_explicit()
.end_cons();
const std::vector<byte> req =
X509_Object::make_signed(signer.get(), rng, sig_algo,
tbs_req.get_contents());
return PKCS10_Request(req);
}
