tmp save

seahub/utils/__init__.py

@@ -1002,7 +1002,7 @@ def send_html_email(subject, con_template, con_context, from_email, to_email,
     """
 
     # get logo path
-    from seahub.utils.mail import add_smime_sign
+    from seahub.utils.mail import SmimeEmailMessage
     logo_path = LOGO_PATH
     custom_logo_file = os.path.join(MEDIA_ROOT, CUSTOM_LOGO_PATH)
     if os.path.exists(custom_logo_file):
@@ -1022,13 +1022,9 @@ def send_html_email(subject, con_template, con_context, from_email, to_email,
         if reply_to is not None:
             headers['Reply-to'] = reply_to
 
-    msg = EmailMessage(subject, t.render(con_context), from_email,
+    msg = SmimeEmailMessage(subject, t.render(con_context), from_email,
                        to_email, headers=headers)
     msg.content_subtype = "html"
-
-    sig_part = add_smime_sign(msg)
-    if sig_part:
-        msg.attach(sig_part)
     msg.send()
 
 def gen_dir_share_link(token):

seahub/utils/mail.py

@@ -2,10 +2,14 @@
 import os
 import logging
 from email.mime.application import MIMEApplication
+from email.mime.multipart import MIMEMultipart
+
 from cryptography.hazmat.primitives import serialization, hashes
 from cryptography.hazmat.primitives.serialization import pkcs7
 from cryptography import x509
 import base64
+
+from django.core.mail.message import SafeMIMEMultipart
 from django.template import loader
 from django.core.mail import EmailMessage
 
@@ -17,53 +21,80 @@ from seahub import settings
 
 logger = logging.getLogger(__name__)
 
-
-def add_smime_sign(msg):
-    if not ENABLE_SMIME:
-        return None
+class SmimeEmailMessage(EmailMessage):
     
-    CERTS_DIR = getattr(settings, 'SMIME_CERTS_DIR', '/opt/seafile/seahub-data/certs')
-    cert_file = os.path.join(CERTS_DIR, 'cert.pem')
-    key_file = os.path.join(CERTS_DIR, 'private_key.pem')
-    if not os.path.exists(cert_file):
-        logger.warning('smime cert file %s does not exists.' % cert_file)
-        return None
+    def __init__(self, *args, **kwargs):
+        super(SmimeEmailMessage, self).__init__(*args, **kwargs)
     
-    if not os.path.exists(key_file):
-        logger.warning('smime key file %s does not exists.' % key_file)
-        return None
     
-    # Load the private key
-    with open(key_file, "rb") as f:
-        private_key = serialization.load_pem_private_key(f.read(), password=None)
+    def _signed(self, msg):
+        if not ENABLE_SMIME:
+            return msg
     
-    # Load the certificate
-    with open(cert_file, "rb") as f:
-        certificate = x509.load_pem_x509_certificate(f.read())
-
-    msg.mixed_subtype = "signed"
+        CERTS_DIR = getattr(settings, 'SMIME_CERTS_DIR', '/opt/seafile/seahub-data/certs')
+        cert_file = os.path.join(CERTS_DIR, 'cert.pem')
+        key_file = os.path.join(CERTS_DIR, 'private_key.pem')
     
-    msg_payload = msg.message().as_string().encode()
+        if not os.path.exists(cert_file):
+            logger.warning(f'smime cert file {cert_file} does not exist.')
+            return msg
+        if not os.path.exists(key_file):
+            logger.warning(f'smime key file {key_file} does not exist.')
+            return msg
+        
+        try:
+            # Load the private key
+            with open(key_file, "rb") as f:
+                private_key = serialization.load_pem_private_key(f.read(), password=None)
+        
+            # Load the certificate
+            with open(cert_file, "rb") as f:
+                certificate = x509.load_pem_x509_certificate(f.read())
+        except Exception as e:
+            logger.error(e)
+            return msg
     
-    builder = pkcs7.PKCS7SignatureBuilder() \
-        .set_data(msg_payload) \
-        .add_signer(certificate, private_key, hashes.SHA256())
-    pkcs7_signature = builder.sign(serialization.Encoding.SMIME, [pkcs7.PKCS7Options.DetachedSignature])
+        original_msg = msg
+        msg_payload = msg.as_string().encode()
     
-    # Base64 encode the signature for S/MIME
-    signature_b64 = base64.b64encode(pkcs7_signature).decode()
+        builder = pkcs7.PKCS7SignatureBuilder() \
+            .set_data(msg_payload) \
+            .add_signer(certificate, private_key, hashes.SHA256())
+        pkcs7_signature = builder.sign(serialization.Encoding.SMIME, [pkcs7.PKCS7Options.DetachedSignature])
     
-    # Create the S/MIME signature part
-    sig_part = MIMEApplication(
-        signature_b64,
-        "pkcs7-signature",
-    )
-    sig_part.set_param("name", "smime.p7s")
-    sig_part.add_header("Content-Disposition", "attachment", filename="smime.p7s")
+        signature = base64.b64encode(pkcs7_signature).decode()
     
-    return sig_part
-
-
+        signed_msg = SafeMIMEMultipart(
+            _subtype='signed',
+            protocol='application/pkcs7-signature',
+            micalg='sha-256'
+        )
+        
+        
+        for header in ['Subject', 'From', 'To', 'Date']:
+            if header in original_msg.keys():
+                signed_msg[header] = original_msg[header]
+    
+        signed_msg.attach(original_msg)
+    
+        sig_part = MIMEApplication(
+            signature,
+            'pkcs7-signature',
+            name='smime.p7s',
+        )
+        sig_part.add_header(
+            'Content-Disposition',
+            'attachment; filename="smime.p7s"'
+        )
+        signed_msg.attach(sig_part)
+        
+        return signed_msg
+    
+    
+    def message(self):
+        original_msg = super().message()
+        return self._signed(original_msg)
+        
 
 def send_html_email_with_dj_template(recipients, subject, dj_template, context={}):
     """
@@ -92,15 +123,12 @@ def send_html_email_with_dj_template(recipients, subject, dj_template, context={
     t = loader.get_template(dj_template)
     html_message = t.render(context)
 
-    mail = EmailMessage(subject=subject, body=html_message, to=[recipients])
+    mail = SmimeEmailMessage(subject=subject, body=html_message, to=[recipients])
     mail.content_subtype = "html"
 
     try:
-        sig_part = add_smime_sign(mail)
-        if sig_part:
-            mail.attach(sig_part)
         mail.send()
         return True
     except Exception as e:
-        logger.error(e)
+        logger.exception(e)
         return False