BIGNUM *
BN_dup(const BIGNUM *bn)
{
BIGNUM *b = BN_new();
if (der_copy_heim_integer((const heim_integer *)bn, (heim_integer *)b)) {
BN_free(b);
return NULL;
}
return b;
}
int
hx509_ca_tbs_set_serialnumber(hx509_context context,
hx509_ca_tbs tbs,
const heim_integer *serialNumber)
{
int ret;
der_free_heim_integer(&tbs->serial);
ret = der_copy_heim_integer(serialNumber, &tbs->serial);
tbs->flags.serial = !ret;
return ret;
}
static int
ca_sign(hx509_context context,
hx509_ca_tbs tbs,
hx509_private_key signer,
const AuthorityKeyIdentifier *ai,
const Name *issuername,
hx509_cert *certificate)
{
heim_octet_string data;
Certificate c;
TBSCertificate *tbsc;
size_t size;
int ret;
const AlgorithmIdentifier *sigalg;
time_t notBefore;
time_t notAfter;
unsigned key_usage;
sigalg = _hx509_crypto_default_sig_alg;
memset(&c, 0, sizeof(c));
/*
* Default values are: Valid since 24h ago, valid one year into
* the future, KeyUsage digitalSignature and keyEncipherment set,
* and keyCertSign for CA certificates.
*/
notBefore = tbs->notBefore;
if (notBefore == 0)
notBefore = time(NULL) - 3600 * 24;
notAfter = tbs->notAfter;
if (notAfter == 0)
notAfter = time(NULL) + 3600 * 24 * 365;
key_usage = tbs->key_usage;
if (key_usage == 0) {
KeyUsage ku;
memset(&ku, 0, sizeof(ku));
ku.digitalSignature = 1;
ku.keyEncipherment = 1;
key_usage = KeyUsage2int(ku);
}
if (tbs->flags.ca) {
KeyUsage ku;
memset(&ku, 0, sizeof(ku));
ku.keyCertSign = 1;
ku.cRLSign = 1;
key_usage |= KeyUsage2int(ku);
}
/*
*
*/
tbsc = &c.tbsCertificate;
if (tbs->flags.key == 0) {
ret = EINVAL;
hx509_set_error_string(context, 0, ret, "No public key set");
return ret;
}
/*
* Don't put restrictions on proxy certificate's subject name, it
* will be generated below.
*/
if (!tbs->flags.proxy) {
if (tbs->subject == NULL) {
hx509_set_error_string(context, 0, EINVAL, "No subject name set");
return EINVAL;
}
if (hx509_name_is_null_p(tbs->subject) && tbs->san.len == 0) {
hx509_set_error_string(context, 0, EINVAL,
"NULL subject and no SubjectAltNames");
return EINVAL;
}
}
if (tbs->flags.ca && tbs->flags.proxy) {
hx509_set_error_string(context, 0, EINVAL, "Can't be proxy and CA "
"at the same time");
return EINVAL;
}
if (tbs->flags.proxy) {
if (tbs->san.len > 0) {
hx509_set_error_string(context, 0, EINVAL,
"Proxy certificate is not allowed "
"to have SubjectAltNames");
return EINVAL;
}
}
/* version [0] Version OPTIONAL, -- EXPLICIT nnn DEFAULT 1, */
tbsc->version = calloc(1, sizeof(*tbsc->version));
if (tbsc->version == NULL) {
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
*tbsc->version = rfc3280_version_3;
/* serialNumber CertificateSerialNumber, */
if (tbs->flags.serial) {
ret = der_copy_heim_integer(&tbs->serial, &tbsc->serialNumber);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
} else {
tbsc->serialNumber.length = 20;
tbsc->serialNumber.data = malloc(tbsc->serialNumber.length);
if (tbsc->serialNumber.data == NULL){
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
/* XXX diffrent */
RAND_bytes(tbsc->serialNumber.data, tbsc->serialNumber.length);
((unsigned char *)tbsc->serialNumber.data)[0] &= 0x7f;
}
/* signature AlgorithmIdentifier, */
ret = copy_AlgorithmIdentifier(sigalg, &tbsc->signature);
if (ret) {
hx509_set_error_string(context, 0, ret, "Failed to copy sigature alg");
goto out;
}
/* issuer Name, */
if (issuername)
ret = copy_Name(issuername, &tbsc->issuer);
else
ret = hx509_name_to_Name(tbs->subject, &tbsc->issuer);
if (ret) {
hx509_set_error_string(context, 0, ret, "Failed to copy issuer name");
goto out;
}
/* validity Validity, */
tbsc->validity.notBefore.element = choice_Time_generalTime;
tbsc->validity.notBefore.u.generalTime = notBefore;
tbsc->validity.notAfter.element = choice_Time_generalTime;
tbsc->validity.notAfter.u.generalTime = notAfter;
/* subject Name, */
if (tbs->flags.proxy) {
ret = build_proxy_prefix(context, &tbsc->issuer, &tbsc->subject);
if (ret)
goto out;
} else {
ret = hx509_name_to_Name(tbs->subject, &tbsc->subject);
if (ret) {
hx509_set_error_string(context, 0, ret,
"Failed to copy subject name");
goto out;
}
}
/* subjectPublicKeyInfo SubjectPublicKeyInfo, */
ret = copy_SubjectPublicKeyInfo(&tbs->spki, &tbsc->subjectPublicKeyInfo);
if (ret) {
hx509_set_error_string(context, 0, ret, "Failed to copy spki");
goto out;
}
/* issuerUniqueID [1] IMPLICIT BIT STRING OPTIONAL */
if (tbs->issuerUniqueID.length) {
tbsc->issuerUniqueID = calloc(1, sizeof(*tbsc->issuerUniqueID));
if (tbsc->issuerUniqueID == NULL) {
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
ret = der_copy_bit_string(&tbs->issuerUniqueID, tbsc->issuerUniqueID);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
}
/* subjectUniqueID [2] IMPLICIT BIT STRING OPTIONAL */
if (tbs->subjectUniqueID.length) {
tbsc->subjectUniqueID = calloc(1, sizeof(*tbsc->subjectUniqueID));
if (tbsc->subjectUniqueID == NULL) {
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
ret = der_copy_bit_string(&tbs->subjectUniqueID, tbsc->subjectUniqueID);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
}
/* extensions [3] EXPLICIT Extensions OPTIONAL */
tbsc->extensions = calloc(1, sizeof(*tbsc->extensions));
if (tbsc->extensions == NULL) {
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
/* Add the text BMP string Domaincontroller to the cert */
if (tbs->flags.domaincontroller) {
data.data = rk_UNCONST("\x1e\x20\x00\x44\x00\x6f\x00\x6d"
"\x00\x61\x00\x69\x00\x6e\x00\x43"
"\x00\x6f\x00\x6e\x00\x74\x00\x72"
"\x00\x6f\x00\x6c\x00\x6c\x00\x65"
"\x00\x72");
data.length = 34;
ret = add_extension(context, tbsc, 0,
&asn1_oid_id_ms_cert_enroll_domaincontroller,
&data);
if (ret)
goto out;
}
/* add KeyUsage */
{
KeyUsage ku;
ku = int2KeyUsage(key_usage);
ASN1_MALLOC_ENCODE(KeyUsage, data.data, data.length, &ku, &size, ret);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
if (size != data.length)
_hx509_abort("internal ASN.1 encoder error");
ret = add_extension(context, tbsc, 1,
&asn1_oid_id_x509_ce_keyUsage, &data);
free(data.data);
if (ret)
goto out;
}
/* add ExtendedKeyUsage */
if (tbs->eku.len > 0) {
ASN1_MALLOC_ENCODE(ExtKeyUsage, data.data, data.length,
&tbs->eku, &size, ret);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
if (size != data.length)
_hx509_abort("internal ASN.1 encoder error");
ret = add_extension(context, tbsc, 0,
&asn1_oid_id_x509_ce_extKeyUsage, &data);
free(data.data);
if (ret)
goto out;
}
/* add Subject Alternative Name */
if (tbs->san.len > 0) {
ASN1_MALLOC_ENCODE(GeneralNames, data.data, data.length,
&tbs->san, &size, ret);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
if (size != data.length)
_hx509_abort("internal ASN.1 encoder error");
ret = add_extension(context, tbsc, 0,
&asn1_oid_id_x509_ce_subjectAltName,
&data);
free(data.data);
if (ret)
goto out;
}
/* Add Authority Key Identifier */
if (ai) {
ASN1_MALLOC_ENCODE(AuthorityKeyIdentifier, data.data, data.length,
ai, &size, ret);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
if (size != data.length)
_hx509_abort("internal ASN.1 encoder error");
ret = add_extension(context, tbsc, 0,
&asn1_oid_id_x509_ce_authorityKeyIdentifier,
&data);
free(data.data);
if (ret)
goto out;
}
/* Add Subject Key Identifier */
{
SubjectKeyIdentifier si;
unsigned char hash[SHA_DIGEST_LENGTH];
{
EVP_MD_CTX *ctx;
ctx = EVP_MD_CTX_create();
EVP_DigestInit_ex(ctx, EVP_sha1(), NULL);
EVP_DigestUpdate(ctx, tbs->spki.subjectPublicKey.data,
tbs->spki.subjectPublicKey.length / 8);
EVP_DigestFinal_ex(ctx, hash, NULL);
EVP_MD_CTX_destroy(ctx);
}
si.data = hash;
si.length = sizeof(hash);
ASN1_MALLOC_ENCODE(SubjectKeyIdentifier, data.data, data.length,
&si, &size, ret);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
if (size != data.length)
_hx509_abort("internal ASN.1 encoder error");
ret = add_extension(context, tbsc, 0,
&asn1_oid_id_x509_ce_subjectKeyIdentifier,
&data);
free(data.data);
if (ret)
goto out;
}
/* Add BasicConstraints */
{
BasicConstraints bc;
int aCA = 1;
unsigned int path;
memset(&bc, 0, sizeof(bc));
if (tbs->flags.ca) {
bc.cA = &aCA;
if (tbs->pathLenConstraint >= 0) {
path = tbs->pathLenConstraint;
bc.pathLenConstraint = &path;
}
}
ASN1_MALLOC_ENCODE(BasicConstraints, data.data, data.length,
&bc, &size, ret);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
if (size != data.length)
_hx509_abort("internal ASN.1 encoder error");
/* Critical if this is a CA */
ret = add_extension(context, tbsc, tbs->flags.ca,
&asn1_oid_id_x509_ce_basicConstraints,
&data);
free(data.data);
if (ret)
goto out;
}
/* add Proxy */
if (tbs->flags.proxy) {
ProxyCertInfo info;
memset(&info, 0, sizeof(info));
if (tbs->pathLenConstraint >= 0) {
info.pCPathLenConstraint =
malloc(sizeof(*info.pCPathLenConstraint));
if (info.pCPathLenConstraint == NULL) {
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
*info.pCPathLenConstraint = tbs->pathLenConstraint;
}
ret = der_copy_oid(&asn1_oid_id_pkix_ppl_inheritAll,
&info.proxyPolicy.policyLanguage);
if (ret) {
free_ProxyCertInfo(&info);
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
ASN1_MALLOC_ENCODE(ProxyCertInfo, data.data, data.length,
&info, &size, ret);
free_ProxyCertInfo(&info);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
if (size != data.length)
_hx509_abort("internal ASN.1 encoder error");
ret = add_extension(context, tbsc, 0,
&asn1_oid_id_pkix_pe_proxyCertInfo,
&data);
free(data.data);
if (ret)
goto out;
}
if (tbs->crldp.len) {
ASN1_MALLOC_ENCODE(CRLDistributionPoints, data.data, data.length,
&tbs->crldp, &size, ret);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
if (size != data.length)
_hx509_abort("internal ASN.1 encoder error");
ret = add_extension(context, tbsc, FALSE,
&asn1_oid_id_x509_ce_cRLDistributionPoints,
&data);
free(data.data);
if (ret)
goto out;
}
ASN1_MALLOC_ENCODE(TBSCertificate, data.data, data.length,tbsc, &size, ret);
if (ret) {
hx509_set_error_string(context, 0, ret, "malloc out of memory");
goto out;
}
if (data.length != size)
_hx509_abort("internal ASN.1 encoder error");
ret = _hx509_create_signature_bitstring(context,
signer,
sigalg,
&data,
&c.signatureAlgorithm,
&c.signatureValue);
free(data.data);
if (ret)
goto out;
ret = hx509_cert_init(context, &c, certificate);
if (ret)
goto out;
free_Certificate(&c);
return 0;
out:
free_Certificate(&c);
return ret;
}
static int
get_AuthorityKeyIdentifier(hx509_context context,
const Certificate *certificate,
AuthorityKeyIdentifier *ai)
{
SubjectKeyIdentifier si;
int ret;
ret = _hx509_find_extension_subject_key_id(certificate, &si);
if (ret == 0) {
ai->keyIdentifier = calloc(1, sizeof(*ai->keyIdentifier));
if (ai->keyIdentifier == NULL) {
free_SubjectKeyIdentifier(&si);
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
ret = der_copy_octet_string(&si, ai->keyIdentifier);
free_SubjectKeyIdentifier(&si);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
} else {
GeneralNames gns;
GeneralName gn;
Name name;
memset(&gn, 0, sizeof(gn));
memset(&gns, 0, sizeof(gns));
memset(&name, 0, sizeof(name));
ai->authorityCertIssuer =
calloc(1, sizeof(*ai->authorityCertIssuer));
if (ai->authorityCertIssuer == NULL) {
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
ai->authorityCertSerialNumber =
calloc(1, sizeof(*ai->authorityCertSerialNumber));
if (ai->authorityCertSerialNumber == NULL) {
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
/*
* XXX unbreak when asn1 compiler handle IMPLICIT
*
* This is so horrible.
*/
ret = copy_Name(&certificate->tbsCertificate.subject, &name);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
memset(&gn, 0, sizeof(gn));
gn.element = choice_GeneralName_directoryName;
gn.u.directoryName.element =
choice_GeneralName_directoryName_rdnSequence;
gn.u.directoryName.u.rdnSequence = name.u.rdnSequence;
ret = add_GeneralNames(&gns, &gn);
if (ret) {
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
ai->authorityCertIssuer->val = gns.val;
ai->authorityCertIssuer->len = gns.len;
ret = der_copy_heim_integer(&certificate->tbsCertificate.serialNumber,
ai->authorityCertSerialNumber);
if (ai->authorityCertSerialNumber == NULL) {
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "Out of memory");
goto out;
}
}
out:
if (ret)
free_AuthorityKeyIdentifier(ai);
return ret;
}
