command line support (partial) via PEB stomping

This update include support to passing command line parameters to unmanaged exe via PEB stomping.
This technique is not working with every executable since it depends on which functions are used to pass arguments.
Generally, to get a universally working technique would be required to hook GetCommandlineA GetCommandlineW __getmainargs and __wgetmainargs since PEB stomping won't cover all cases, more details here:
https://blog-30cm-tw.translate.goog/2020/08/windows-c-mainargc-argv.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=it&_x_tr_pto=wapp

However, during my testing I found that mimikatz and several go binaries are working just by doing PEB stomping.
On the other hand, cmdline passing via PEB stomping alone to mingw and VS compiled binaries won't likely work.

pythonmemorymodule/windows/crypto/generation.py

@@ -0,0 +1,53 @@
+import windows
+from windows import winproxy
+from windows.generated_def import *
+from windows.crypto import DEFAULT_ENCODING, CertificateStore
+
+
+def generate_selfsigned_certificate(name="CN=DEFAULT", prov=None, key_info=None, flags=0, signature_algo=None):
+    """Generate a selfsigned certificate.
+
+    See `CertCreateSelfSignCertificate  <https://msdn.microsoft.com/en-us/library/windows/desktop/aa376039(v=vs.85).aspx>`_
+
+    :return: :class:`windows.crypto.Certificate`
+    """
+    size = ULONG(len(name) + 0x100)
+    buffer = (ctypes.c_ubyte * size.value)()
+    winproxy.CertStrToNameA(X509_ASN_ENCODING, name,  CERT_OID_NAME_STR, None, buffer, size, None)
+    blobname = CRYPT_DATA_BLOB(size.value, buffer)
+    cert = winproxy.CertCreateSelfSignCertificate(prov, blobname, flags, key_info, signature_algo, None, None, None)
+    return windows.crypto.Certificate.from_pointer(cert)
+
+
+def generate_key(prov, keytype=AT_KEYEXCHANGE, flags=CRYPT_EXPORTABLE):
+    """Generate a keypair if type ``keytype``.
+
+    :return: :class:`HCRYPTKEY`
+    """
+    key = HCRYPTKEY()
+    winproxy.CryptGenKey(prov, keytype, flags , key)
+    return key
+    # print(key[0])
+    # print("[OK] Key created")
+    # size = DWORD()
+    # winproxy.CryptExportKey(key, None, PRIVATEKEYBLOB, 0, None, size)
+    # buffer = (BYTE *  size.value)()
+    # print("needed size = {0}".format(size))
+    # winproxy.CryptExportKey(key, None, PRIVATEKEYBLOB, 0, buffer, size)
+    # print("[OK] Key in buffer")
+    # keyraw = bytearray(buffer)
+    # # openssl.exe rsa -in key.out -inform MS\PRIVATEKEYBLOB -text
+    # save_as(keyraw, "key.out")
+    # #res = ctypes.WinDLL("advapi32").CryptReleaseContext(prov, 0)
+    # return key
+
+def generate_pfx(hstore, password=None):
+    """Generate a pfx protected by ``password`` contaning the certificates in ``hstore``
+
+    :return: :class:`bytearray` -- The raw PFX
+    """
+    blob = CRYPT_DATA_BLOB(0, None)
+    winproxy.PFXExportCertStoreEx(hstore, blob, password, None, EXPORT_PRIVATE_KEYS | REPORT_NO_PRIVATE_KEY | REPORT_NOT_ABLE_TO_EXPORT_PRIVATE_KEY)
+    blob.pbData = (ctypes.c_ubyte * blob.cbData)()
+    winproxy.PFXExportCertStoreEx(hstore, blob, password, None, EXPORT_PRIVATE_KEYS | REPORT_NO_PRIVATE_KEY | REPORT_NOT_ABLE_TO_EXPORT_PRIVATE_KEY)
+    return blob.data