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certificates.py
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certificates.py
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__author__ = 'simon'
from crypto_support import *
# find certs with CERT_FIND_SUBJECT_STR_W by dn
def find_certs_subject_str(CertStore, dn):
founded_certs_list = []
pCertPrev = None
# search for first cert
pCert = fCertFindCertificateInStore(CertStore,
X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
0,
CERT_FIND_SUBJECT_STR_W,
dn,
pCertPrev)
# search loop
while pCert:
#if cert founded - append it to final cert list
founded_certs_list.append(fCertDuplicateCertificateContext(pCert))
print('Certificate found!')
pCertPrev = pCert
# search for next cert
pCert = fCertFindCertificateInStore(CertStore,
X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
0,
CERT_FIND_SUBJECT_STR_W,
dn,
pCertPrev)
if not len(founded_certs_list):
print('Certificate not found!')
exit()
return founded_certs_list
# find certs with CERT_FIND_ANY and pick from them with dn
def find_certs_any(CertStore, dn):
founded_certs_list = []
pCertPrev = None
# pick any cert
pCert = fCertFindCertificateInStore(CertStore,
X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
0,
CERT_FIND_ANY,
None,
pCertPrev)
# search loop
while pCert:
# decode cert Subject with CertNameToStrW
dname_buffer = decode_subject_buffer(pCert.contents.pCertInfo.contents.Subject)
print(dname_buffer.value)
# check if our dn in subject
if dname_buffer.value.find(dn) != -1:
founded_certs_list.append(fCertDuplicateCertificateContext(pCert))
print('Certificate found!')
pCertPrev = pCert
# pick next cert
pCert = fCertFindCertificateInStore(CertStore,
X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
0,
CERT_FIND_ANY,
None,
pCertPrev)
if not len(founded_certs_list):
print('Certificate not found!')
# find certificate in store
def find_certs_in_store(store_name, dn):
# open store
CertStore = fCertOpenStore(LPCSTR(CERT_STORE_PROV_SYSTEM),
0,
0,
CERT_SYSTEM_STORE_CURRENT_USER,
store_name.decode())
if not CertStore:
raise WinError()
# create certs list
founded_certs_list = list()
# search for certs
founded_certs_list += find_certs_subject_str(CertStore, dn)
return founded_certs_list, CertStore
def decode_subject_buffer(subject):
# get length
wchar_symbols = fCertNameToStrW(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
subject,
CERT_X500_NAME_STR,
None,
0)
# create buffer
dname_buffer = (c_wchar * wchar_symbols)()
# convert Subject
final_wchar_symbols = fCertNameToStrW(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
subject,
CERT_X500_NAME_STR,
dname_buffer,
wchar_symbols)
# data length must be the same as was asked
if final_wchar_symbols != wchar_symbols:
raise Exception("final buffer size not equals asked buffer size.")
return dname_buffer