/* retrieve basic constraints ingredients */
BOOL modssl_X509_getBC(X509 *cert, int *ca, int *pathlen)
{
BASIC_CONSTRAINTS *bc;
BIGNUM *bn = NULL;
char *cp;
bc = X509_get_ext_d2i(cert, NID_basic_constraints, NULL, NULL);
if (bc == NULL)
return FALSE;
*ca = bc->ca;
*pathlen = -1 /* unlimited */;
if (bc->pathlen != NULL) {
if ((bn = ASN1_INTEGER_to_BN(bc->pathlen, NULL)) == NULL) {
BASIC_CONSTRAINTS_free(bc);
return FALSE;
}
if ((cp = BN_bn2dec(bn)) == NULL) {
BN_free(bn);
BASIC_CONSTRAINTS_free(bc);
return FALSE;
}
*pathlen = atoi(cp);
OPENSSL_free(cp);
BN_free(bn);
}
BASIC_CONSTRAINTS_free(bc);
return TRUE;
}
/* retrieve basic constraints ingredients */
BOOL SSL_X509_getBC(X509 *cert, int *ca, int *pathlen)
{
X509_EXTENSION *ext;
BASIC_CONSTRAINTS *bc;
int idx;
BIGNUM *bn = NULL;
char *cp;
if ((idx = X509_get_ext_by_NID(cert, NID_basic_constraints, -1)) < 0)
return FALSE;
ext = X509_get_ext(cert, idx);
if (ext == NULL)
return FALSE;
if ((bc = (BASIC_CONSTRAINTS *)X509V3_EXT_d2i(ext)) == NULL)
return FALSE;
*ca = bc->ca;
*pathlen = -1 /* unlimited */;
if (bc->pathlen != NULL) {
if ((bn = ASN1_INTEGER_to_BN(bc->pathlen, NULL)) == NULL)
return FALSE;
if ((cp = BN_bn2dec(bn)) == NULL)
return FALSE;
*pathlen = atoi(cp);
OPENSSL_free(cp);
BN_free(bn);
}
BASIC_CONSTRAINTS_free(bc);
return TRUE;
}
PKI_X509_CERT_TYPE PKI_X509_CERT_get_type(const PKI_X509_CERT *x) {
PKI_X509_CERT_TYPE ret = PKI_X509_CERT_TYPE_USER;
const PKI_X509_NAME *subj = NULL;
const PKI_X509_NAME *issuer = NULL;
BASIC_CONSTRAINTS *bs = NULL;
PKI_X509_EXTENSION *ext = NULL;
if (!x || !x->value || (x->type != PKI_DATATYPE_X509_CERT) )
return PKI_X509_CERT_TYPE_UNKNOWN;
subj = PKI_X509_CERT_get_data ( x, PKI_X509_DATA_SUBJECT );
issuer = PKI_X509_CERT_get_data ( x, PKI_X509_DATA_ISSUER );
if ( subj && issuer ) {
if ( PKI_X509_NAME_cmp( subj, issuer ) == 0) {
ret |= PKI_X509_CERT_TYPE_ROOT;
}
}
if((ext = PKI_X509_CERT_get_extension_by_id ( x,
NID_basic_constraints)) != NULL ) {
if(( bs = ext->value )) {
if ( bs->ca ) ret |= PKI_X509_CERT_TYPE_CA;
BASIC_CONSTRAINTS_free ( bs );
}
PKI_X509_EXTENSION_free ( ext );
}
if((ext = PKI_X509_CERT_get_extension_by_id ( x,
NID_proxyCertInfo )) != NULL ) {
if ( ret & PKI_X509_CERT_TYPE_CA ) {
PKI_log_err ( "Certificate Error, Proxy Cert info set",
"in a CA certificate!");
} else {
ret |= PKI_X509_CERT_TYPE_PROXY;
}
PKI_X509_EXTENSION_free ( ext );
}
return ret;
}
extern "C" int32_t DecodeX509BasicConstraints2Extension(const unsigned char* encoded,
int32_t encodedLength,
int32_t* certificateAuthority,
int32_t* hasPathLengthConstraint,
int32_t* pathLengthConstraint)
{
if (!certificateAuthority || !hasPathLengthConstraint || !pathLengthConstraint)
{
return false;
}
*certificateAuthority = false;
*hasPathLengthConstraint = false;
*pathLengthConstraint = 0;
int32_t result = false;
BASIC_CONSTRAINTS* constraints = d2i_BASIC_CONSTRAINTS(nullptr, &encoded, encodedLength);
if (constraints)
{
*certificateAuthority = constraints->ca != 0;
if (constraints->pathlen != nullptr)
{
*hasPathLengthConstraint = true;
long pathLength = ASN1_INTEGER_get(constraints->pathlen);
// pathLengthConstraint needs to be in the Int32 range
assert(pathLength <= INT32_MAX);
*pathLengthConstraint = static_cast<int32_t>(pathLength);
}
else
{
*hasPathLengthConstraint = false;
*pathLengthConstraint = 0;
}
BASIC_CONSTRAINTS_free(constraints);
result = true;
}
return result;
}
static void x509v3_cache_extensions(X509 *x)
{
BASIC_CONSTRAINTS *bs;
PROXY_CERT_INFO_EXTENSION *pci;
ASN1_BIT_STRING *usage;
ASN1_BIT_STRING *ns;
EXTENDED_KEY_USAGE *extusage;
X509_EXTENSION *ex;
int i;
if(x->ex_flags & EXFLAG_SET) return;
#ifndef OPENSSL_NO_SHA
X509_digest(x, EVP_sha1(), x->sha1_hash, NULL);
#endif
/* Does subject name match issuer ? */
if(!X509_NAME_cmp(X509_get_subject_name(x), X509_get_issuer_name(x)))
x->ex_flags |= EXFLAG_SS;
/* V1 should mean no extensions ... */
if(!X509_get_version(x)) x->ex_flags |= EXFLAG_V1;
/* Handle basic constraints */
if((bs=X509_get_ext_d2i(x, NID_basic_constraints, NULL, NULL))) {
if(bs->ca) x->ex_flags |= EXFLAG_CA;
if(bs->pathlen) {
if((bs->pathlen->type == V_ASN1_NEG_INTEGER)
|| !bs->ca) {
x->ex_flags |= EXFLAG_INVALID;
x->ex_pathlen = 0;
} else x->ex_pathlen = ASN1_INTEGER_get(bs->pathlen);
} else x->ex_pathlen = -1;
BASIC_CONSTRAINTS_free(bs);
x->ex_flags |= EXFLAG_BCONS;
}
/* Handle proxy certificates */
if((pci=X509_get_ext_d2i(x, NID_proxyCertInfo, NULL, NULL))) {
if (x->ex_flags & EXFLAG_CA
|| X509_get_ext_by_NID(x, NID_subject_alt_name, 0) >= 0
|| X509_get_ext_by_NID(x, NID_issuer_alt_name, 0) >= 0) {
x->ex_flags |= EXFLAG_INVALID;
}
if (pci->pcPathLengthConstraint) {
x->ex_pcpathlen =
ASN1_INTEGER_get(pci->pcPathLengthConstraint);
} else x->ex_pcpathlen = -1;
PROXY_CERT_INFO_EXTENSION_free(pci);
x->ex_flags |= EXFLAG_PROXY;
}
/* Handle key usage */
if((usage=X509_get_ext_d2i(x, NID_key_usage, NULL, NULL))) {
if(usage->length > 0) {
x->ex_kusage = usage->data[0];
if(usage->length > 1)
x->ex_kusage |= usage->data[1] << 8;
} else x->ex_kusage = 0;
x->ex_flags |= EXFLAG_KUSAGE;
ASN1_BIT_STRING_free(usage);
}
x->ex_xkusage = 0;
if((extusage=X509_get_ext_d2i(x, NID_ext_key_usage, NULL, NULL))) {
x->ex_flags |= EXFLAG_XKUSAGE;
for(i = 0; i < sk_ASN1_OBJECT_num(extusage); i++) {
switch(OBJ_obj2nid(sk_ASN1_OBJECT_value(extusage,i))) {
case NID_server_auth:
x->ex_xkusage |= XKU_SSL_SERVER;
break;
case NID_client_auth:
x->ex_xkusage |= XKU_SSL_CLIENT;
break;
case NID_email_protect:
x->ex_xkusage |= XKU_SMIME;
break;
case NID_code_sign:
x->ex_xkusage |= XKU_CODE_SIGN;
break;
case NID_ms_sgc:
case NID_ns_sgc:
x->ex_xkusage |= XKU_SGC;
break;
case NID_OCSP_sign:
x->ex_xkusage |= XKU_OCSP_SIGN;
break;
case NID_time_stamp:
x->ex_xkusage |= XKU_TIMESTAMP;
break;
case NID_dvcs:
x->ex_xkusage |= XKU_DVCS;
break;
}
}
sk_ASN1_OBJECT_pop_free(extusage, ASN1_OBJECT_free);
}
if((ns=X509_get_ext_d2i(x, NID_netscape_cert_type, NULL, NULL))) {
if(ns->length > 0) x->ex_nscert = ns->data[0];
else x->ex_nscert = 0;
x->ex_flags |= EXFLAG_NSCERT;
ASN1_BIT_STRING_free(ns);
}
x->skid =X509_get_ext_d2i(x, NID_subject_key_identifier, NULL, NULL);
x->akid =X509_get_ext_d2i(x, NID_authority_key_identifier, NULL, NULL);
for (i = 0; i < X509_get_ext_count(x); i++)
{
ex = X509_get_ext(x, i);
if (!X509_EXTENSION_get_critical(ex))
continue;
if (!X509_supported_extension(ex))
{
x->ex_flags |= EXFLAG_CRITICAL;
break;
}
}
x->ex_flags |= EXFLAG_SET;
}