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Add the CA:TRUE basic constraint when generating a CA certificate

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Kovid Goyal 2017-05-16 16:17:47 +05:30
parent 7da4a00a9b
commit 3511b4e5e4
No known key found for this signature in database
GPG Key ID: 06BC317B515ACE7C
2 changed files with 20 additions and 16 deletions
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21
src/calibre/utils/certgen.c
View File

@ -97,7 +97,7 @@ static PyObject* create_rsa_cert_req(PyObject *self, PyObject *args) {
RSA *KeyPair = NULL;
PyObject *capsule = NULL, *ans = NULL, *t = NULL;
X509_NAME *Name = NULL;
char *common_name = NULL, *country = NULL, *state = NULL, *locality = NULL, *org = NULL, *org_unit = NULL, *email = NULL, buf[1024];
char *common_name = NULL, *country = NULL, *state = NULL, *locality = NULL, *org = NULL, *org_unit = NULL, *email = NULL, *basic_constraints = NULL, buf[1024];
X509_REQ *Cert = NULL;
EVP_PKEY *PrivateKey = NULL;
PyObject *alt_names = NULL;
@ -105,7 +105,7 @@ static PyObject* create_rsa_cert_req(PyObject *self, PyObject *args) {
Py_ssize_t i = 0;
STACK_OF(X509_EXTENSION) *exts = NULL;
if(!PyArg_ParseTuple(args, "OOszzzzzz", &capsule, &alt_names, &common_name, &country, &state, &locality, &org, &org_unit, &email)) return NULL;
if(!PyArg_ParseTuple(args, "OOszzzzzzz", &capsule, &alt_names, &common_name, &country, &state, &locality, &org, &org_unit, &email, &basic_constraints)) return NULL;
if(!PyCapsule_CheckExact(capsule)) return PyErr_Format(PyExc_TypeError, "The key is not a capsule object");
if(!PySequence_Check(alt_names)) return PyErr_Format(PyExc_TypeError, "alt_names must be a sequence");
KeyPair = PyCapsule_GetPointer(capsule, NULL);
@ -123,7 +123,7 @@ static PyObject* create_rsa_cert_req(PyObject *self, PyObject *args) {
if (!add_entry(Name, "emailAddress", email)) goto error;
if (!add_entry(Name, "CN", common_name)) goto error;
if (PySequence_Length(alt_names) > 0) {
if (PySequence_Length(alt_names) > 0 || basic_constraints) {
exts = sk_X509_EXTENSION_new_null();
if (!exts) { set_error("sk_X509_EXTENSION_new_null"); goto error; }
for (i = 0; i < PySequence_Length(alt_names); i++) {
@ -133,6 +133,9 @@ static PyObject* create_rsa_cert_req(PyObject *self, PyObject *args) {
Py_XDECREF(t);
if(!add_ext(exts, NID_subject_alt_name, buf)) goto error;
}
if (basic_constraints) {
if(!add_ext(exts, NID_basic_constraints, basic_constraints)) goto error;
}
X509_REQ_add_extensions(Cert, exts);
sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
}
@ -243,13 +246,11 @@ static PyObject* create_rsa_cert(PyObject *self, PyObject *args) {
if (!Name) { set_error("X509_REQ_get_subject_name(CA_cert)"); goto error; }
if (!X509_set_issuer_name(Cert, Name)) { set_error("X509_set_issuer_name"); goto error; }
if (!req_is_for_CA_cert) {
exts = X509_REQ_get_extensions(req);
if (exts) {
X509V3_set_ctx(&ctx, CA_cert, Cert, NULL, NULL, 0);
for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
if(!X509_add_ext(Cert, sk_X509_EXTENSION_value(exts, i), -1)) { set_error("X509_add_ext"); goto error; }
}
exts = X509_REQ_get_extensions(req);
if (exts) {
X509V3_set_ctx(&ctx, CA_cert, Cert, NULL, NULL, 0);
for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
if(!X509_add_ext(Cert, sk_X509_EXTENSION_value(exts, i), -1)) { set_error("X509_add_ext"); goto error; }
}
}

15
src/calibre/utils/certgen.py
View File

@ -9,7 +9,7 @@ __copyright__ = '2015, Kovid Goyal <kovid at kovidgoyal.net>'
from calibre.constants import plugins
certgen, err = plugins['certgen']
if err:
raise ImportError('Failed to load teh certgen module with error: %s' % err)
raise ImportError('Failed to load the certgen module with error: %s' % err)
def create_key_pair(size=2048):
@ -19,7 +19,7 @@ def create_key_pair(size=2048):
def create_cert_request(
key_pair, common_name,
country='IN', state='Maharashtra', locality='Mumbai', organization=None,
organizational_unit=None, email_address=None, alt_names=()
organizational_unit=None, email_address=None, alt_names=(), basic_constraints=None
):
def enc(x):
if isinstance(x, type('')):
@ -27,7 +27,7 @@ def create_cert_request(
return x or None
return certgen.create_rsa_cert_req(
key_pair, tuple(bytes(enc(x)) for x in alt_names if x),
*map(enc, (common_name, country, state, locality, organization, organizational_unit, email_address))
*map(enc, (common_name, country, state, locality, organization, organizational_unit, email_address, basic_constraints))
)
@ -59,7 +59,7 @@ def create_server_cert(
):
# Create the Certificate Authority
cakey = create_key_pair(key_size)
careq = create_cert_request(cakey, ca_name)
careq = create_cert_request(cakey, ca_name, basic_constraints='CA:TRUE')
cacert = create_ca_cert(careq, cakey)
# Create the server certificate issued by the newly created CA
@ -81,8 +81,11 @@ def create_server_cert(
export(ca_key_file, cakey, serialize_key, encrypt_key_with_password)
return cacert, cakey, cert, pkey
if __name__ == '__main__':
cacert, cakey, cert, pkey = create_server_cert('test.me', alt_names=['1.test.me', '*.all.test.me'])
print("CA Certificate")
print (cert_info(cacert).encode('utf-8'))
print(), print(), print()
print('Server Certificate')
print (cert_info(cert).encode('utf-8'))