diff options
Diffstat (limited to 'src/cryptography')
| -rw-r--r-- | src/cryptography/hazmat/backends/openssl/x509.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/x509.py b/src/cryptography/hazmat/backends/openssl/x509.py index cc805755..41258483 100644 --- a/src/cryptography/hazmat/backends/openssl/x509.py +++ b/src/cryptography/hazmat/backends/openssl/x509.py @@ -537,6 +537,35 @@ def _decode_issuer_alt_name(backend, ext): ) +def _decode_name_constraints(backend, ext): + nc = backend._ffi.cast( + "NAME_CONSTRAINTS *", backend._lib.X509V3_EXT_d2i(ext) + ) + assert nc != backend._ffi.NULL + nc = backend._ffi.gc(nc, backend._lib.NAME_CONSTRAINTS_free) + permitted = _decode_general_subtrees(backend, nc.permittedSubtrees) + excluded = _decode_general_subtrees(backend, nc.excludedSubtrees) + return x509.NameConstraints( + permitted_subtrees=permitted, excluded_subtrees=excluded + ) + + +def _decode_general_subtrees(backend, stack_subtrees): + if stack_subtrees == backend._ffi.NULL: + return None + + num = backend._lib.sk_GENERAL_SUBTREE_num(stack_subtrees) + subtrees = [] + + for i in range(num): + obj = backend._lib.sk_GENERAL_SUBTREE_value(stack_subtrees, i) + assert obj != backend._ffi.NULL + name = _decode_general_name(backend, obj.base) + subtrees.append(name) + + return subtrees + + def _decode_extended_key_usage(backend, ext): sk = backend._ffi.cast( "Cryptography_STACK_OF_ASN1_OBJECT *", @@ -728,6 +757,7 @@ _CERTIFICATE_EXTENSION_PARSER = _X509ExtensionParser( x509.OID_OCSP_NO_CHECK: _decode_ocsp_no_check, x509.OID_INHIBIT_ANY_POLICY: _decode_inhibit_any_policy, x509.OID_ISSUER_ALTERNATIVE_NAME: _decode_issuer_alt_name, + x509.OID_NAME_CONSTRAINTS: _decode_name_constraints, } ) |