Handle DKIM key generation and storage

admin/freeposte/admin/dkim.py

@@ -0,0 +1,21 @@
+""" No crypto operation is done on keys.
+They are thus represented as ASCII armored PEM.
+"""
+
+from OpenSSL import crypto
+
+
+def gen_key(key_type=crypto.TYPE_RSA, bits=1024):
+    """ Generate and return a new RSA key.
+    """
+    key = crypto.PKey()
+    key.generate_key(key_type, bits)
+    return crypto.dump_privatekey(crypto.FILETYPE_PEM, key)
+
+
+def strip_key(pem):
+    """ Return only the b64 part of the ASCII armored PEM.
+    """
+    key = crypto.load_privatekey(crypto.FILETYPE_PEM, pem)
+    public_pem = crypto.dump_publickey(crypto.FILETYPE_PEM, key)
+    return public_pem.replace(b"\n", b"").split(b"-----")[2]