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Implement message generation using lettre_email

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dignifiedquire
2019-11-30 01:09:47 +01:00
parent dbd6303829
commit 47197aa495
9 changed files with 844 additions and 828 deletions
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322
src/e2ee.rs
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@@ -54,191 +54,184 @@ impl EncryptHelper {
Aheader::new(addr, pk, self.prefer_encrypt)
}
/// Determines if we can and should encrypt.
pub fn should_encrypt(
&self,
context: &Context,
e2ee_guaranteed: bool,
peerstates: &[(Option<Peerstate>, &str)],
) -> Result<bool> {
if !(self.prefer_encrypt == EncryptPreference::Mutual || e2ee_guaranteed) {
return Ok(false);
}
for (peerstate, addr) in peerstates {
match peerstate {
Some(peerstate) => {
if peerstate.prefer_encrypt != EncryptPreference::Mutual && !e2ee_guaranteed {
info!(context, "peerstate for {:?} is no-encrypt", addr);
return Ok(false);
}
}
None => {
let msg = format!("peerstate for {:?} missing, cannot encrypt", addr);
if e2ee_guaranteed {
return Err(format_err!("{}", msg));
} else {
info!(context, "{}", msg);
return Ok(false);
}
}
}
}
Ok(true)
}
/// Tries to encrypt the passed in `mail`.
pub fn try_encrypt(
&mut self,
factory: &mut MimeFactory,
e2ee_guaranteed: bool,
min_verified: PeerstateVerifiedStatus,
do_gossip: bool,
mut in_out_message: lettre_email::Email,
mut mail: lettre_email::Email,
imffields_unprotected: Vec<lettre_email::Header>,
) -> Result<lettre_email::Email> {
unimplemented!()
// // libEtPan's pgp_encrypt_mime() takes the parent as the new root.
// // We just expect the root as being given to this function.
// ensure!(
// !in_out_message.is_null() && { (*in_out_message).mm_parent.is_null() },
// "corrupted inputs"
// );
peerstates: &[(Option<Peerstate>, &str)],
) -> Result<(lettre_email::Email, bool)> {
let context = &factory.context;
let mut keyring = Keyring::default();
let mut gossip_headers: Vec<String> = Vec::with_capacity(factory.recipients_addr.len());
// if !(self.prefer_encrypt == EncryptPreference::Mutual || e2ee_guaranteed) {
// return Ok(false);
// }
for (peerstate, addr) in peerstates
.iter()
.filter_map(|(state, addr)| state.as_ref().map(|s| (s, addr)))
{
if let Some(key) = peerstate.peek_key(min_verified) {
keyring.add_owned(key.clone());
if do_gossip {
if let Some(header) = peerstate.render_gossip_header(min_verified) {
gossip_headers.push(header.to_string());
}
}
} else {
bail!("proper enc-key for {} missing, cannot encrypt", addr);
}
}
// let context = &factory.context;
// let mut keyring = Keyring::default();
// let mut gossip_headers: Vec<String> = Vec::with_capacity(factory.recipients_addr.len());
// libEtPan's pgp_encrypt_mime() takes the parent as the new root.
// We just expect the root as being given to this function.
let sign_key = {
keyring.add_ref(&self.public_key);
let key = Key::from_self_private(context, self.addr.clone(), &context.sql);
ensure!(key.is_some(), "no own private key found");
// // determine if we can and should encrypt
// for recipient_addr in factory.recipients_addr.iter() {
// if recipient_addr == &self.addr {
// continue;
// }
// let peerstate = match Peerstate::from_addr(context, &context.sql, recipient_addr) {
// Some(peerstate) => peerstate,
// None => {
// let msg = format!("peerstate for {} missing, cannot encrypt", recipient_addr);
// if e2ee_guaranteed {
// return Err(format_err!("{}", msg));
// } else {
// info!(context, "{}", msg);
// return Ok(false);
// }
// }
// };
key
};
// if peerstate.prefer_encrypt != EncryptPreference::Mutual && !e2ee_guaranteed {
// info!(context, "peerstate for {} is no-encrypt", recipient_addr);
// return Ok(false);
// }
// encrypt message
use lettre_email::{EmailBuilder, MimeMessage, PartBuilder};
// if let Some(key) = peerstate.peek_key(min_verified) {
// keyring.add_owned(key.clone());
// if do_gossip {
// if let Some(header) = peerstate.render_gossip_header(min_verified) {
// gossip_headers.push(header.to_string());
// }
// }
// } else {
// bail!(
// "proper enc-key for {} missing, cannot encrypt",
// recipient_addr
// );
// }
// }
// let mut part_to_encrypt: lettre::SendableEmail = mail.into().to_string()?.into_bytes();
// let sign_key = {
// keyring.add_ref(&self.public_key);
// let key = Key::from_self_private(context, self.addr.clone(), &context.sql);
// ensure!(key.is_some(), "no own private key found");
let mut mail_to_encrypt = EmailBuilder::new();
// key
// };
for header in &gossip_headers {
mail_to_encrypt = mail_to_encrypt.header(("Autocrypt-Gossip", header));
}
// // encrypt message
// {
// mailprivacy_prepare_mime(in_out_message);
// let mut part_to_encrypt = (*in_out_message).mm_data.mm_message.mm_msg_mime;
// (*part_to_encrypt).mm_parent = ptr::null_mut();
// let imffields_encrypted = mailimf_fields_new_empty();
// memoryhole headers: move some headers into encrypted part
// // mailmime_new_message_data() calls mailmime_fields_new_with_version()
// // which would add the unwanted MIME-Version:-header
// let message_to_encrypt = mailmime_new_simple(
// MAILMIME_MESSAGE as libc::c_int,
// mailmime_fields_new_empty(),
// mailmime_get_content_message(),
// imffields_encrypted,
// part_to_encrypt,
// );
// while !cur.is_null() {
// let field = (*cur).data as *mut mailimf_field;
// let mut move_to_encrypted = false;
// for header in &gossip_headers {
// wrapmime::new_custom_field(imffields_encrypted, "Autocrypt-Gossip", &header)
// }
// // memoryhole headers: move some headers into encrypted part
// // XXX note we can't use clist's into_iter() because the loop body also removes items
// let mut cur = (*(*imffields_unprotected).fld_list).first;
// while !cur.is_null() {
// let field = (*cur).data as *mut mailimf_field;
// let mut move_to_encrypted = false;
// if !field.is_null() {
// if (*field).fld_type == MAILIMF_FIELD_SUBJECT as libc::c_int {
// move_to_encrypted = true;
// } else if (*field).fld_type == MAILIMF_FIELD_OPTIONAL_FIELD as libc::c_int {
// let opt_field = (*field).fld_data.fld_optional_field;
// if !opt_field.is_null() && !(*opt_field).fld_name.is_null() {
// let fld_name = to_string_lossy((*opt_field).fld_name);
// if fld_name.starts_with("Secure-Join")
// || (fld_name.starts_with("Chat-") && fld_name != "Chat-Version")
// {
// move_to_encrypted = true;
// }
// if !field.is_null() {
// if (*field).fld_type == MAILIMF_FIELD_SUBJECT as libc::c_int {
// move_to_encrypted = true;
// } else if (*field).fld_type == MAILIMF_FIELD_OPTIONAL_FIELD as libc::c_int {
// let opt_field = (*field).fld_data.fld_optional_field;
// if !opt_field.is_null() && !(*opt_field).fld_name.is_null() {
// let fld_name = to_string_lossy((*opt_field).fld_name);
// if fld_name.starts_with("Secure-Join")
// || (fld_name.starts_with("Chat-") && fld_name != "Chat-Version")
// {
// move_to_encrypted = true;
// }
// }
// }
// if move_to_encrypted {
// mailimf_fields_add(imffields_encrypted, field);
// cur = clist_delete((*imffields_unprotected).fld_list, cur);
// } else {
// cur = (*cur).next;
// }
// }
// let subject = mailimf_subject_new("...".strdup());
// mailimf_fields_add(imffields_unprotected, mailimf_field_new_subject(subject));
// wrapmime::append_ct_param(
// (*part_to_encrypt).mm_content_type,
// "protected-headers",
// "v1",
// )?;
// let plain = mmap_string_new(b"\x00" as *const u8 as *const libc::c_char);
// let mut col = 0;
// mailmime_write_mem(plain, &mut col, message_to_encrypt);
// mailmime_free(message_to_encrypt);
// ensure!(
// !(*plain).str_0.is_null() && (*plain).len > 0,
// "could not write/allocate"
// );
// let ctext = pgp::pk_encrypt(
// std::slice::from_raw_parts((*plain).str_0 as *const u8, (*plain).len),
// &keyring,
// sign_key.as_ref(),
// );
// mmap_string_free(plain);
// let ctext_v = ctext?;
// // create MIME-structure that will contain the encrypted text
// let mut encrypted_part = new_data_part(
// ptr::null_mut(),
// 0 as libc::size_t,
// "multipart/encrypted",
// MAILMIME_MECHANISM_BASE64,
// )?;
// let content = (*encrypted_part).mm_content_type;
// wrapmime::append_ct_param(content, "protocol", "application/pgp-encrypted")?;
// let version_mime = new_data_part(
// VERSION_CONTENT.as_mut_ptr() as *mut libc::c_void,
// strlen(VERSION_CONTENT.as_mut_ptr()),
// "application/pgp-encrypted",
// MAILMIME_MECHANISM_7BIT,
// )?;
// mailmime_smart_add_part(encrypted_part, version_mime);
// // we assume that ctext_v is not dropped until the end
// // of this if-scope
// let ctext_part = new_data_part(
// ctext_v.as_ptr() as *mut libc::c_void,
// ctext_v.len(),
// "application/octet-stream",
// MAILMIME_MECHANISM_7BIT,
// )?;
// mailmime_smart_add_part(encrypted_part, ctext_part);
// (*in_out_message).mm_data.mm_message.mm_msg_mime = encrypted_part;
// (*encrypted_part).mm_parent = in_out_message;
// let gossiped = !&gossip_headers.is_empty();
// factory.finalize_mime_message(in_out_message, true, gossiped)?;
// Ok(true)
// if move_to_encrypted {
// mailimf_fields_add(imffields_encrypted, field);
// cur = clist_delete((*imffields_unprotected).fld_list, cur);
// } else {
// cur = (*cur).next;
// }
// }
// let subject = mailimf_subject_new("...".strdup());
// mailimf_fields_add(imffields_unprotected, mailimf_field_new_subject(subject));
// wrapmime::append_ct_param(
// (*part_to_encrypt).mm_content_type,
// "protected-headers",
// "v1",
// )?;
// let plain = mmap_string_new(b"\x00" as *const u8 as *const libc::c_char);
// let mut col = 0;
// mailmime_write_mem(plain, &mut col, message_to_encrypt);
// mailmime_free(message_to_encrypt);
// ensure!(
// !(*plain).str_0.is_null() && (*plain).len > 0,
// "could not write/allocate"
// );
// let ctext = pgp::pk_encrypt(
// std::slice::from_raw_parts((*plain).str_0 as *const u8, (*plain).len),
// &keyring,
// sign_key.as_ref(),
// );
// mmap_string_free(plain);
// let ctext_v = ctext?;
// // create MIME-structure that will contain the encrypted text
// let mut encrypted_part = new_data_part(
// ptr::null_mut(),
// 0 as libc::size_t,
// "multipart/encrypted",
// MAILMIME_MECHANISM_BASE64,
// )?;
// let content = (*encrypted_part).mm_content_type;
// wrapmime::append_ct_param(content, "protocol", "application/pgp-encrypted")?;
// let version_mime = new_data_part(
// VERSION_CONTENT.as_mut_ptr() as *mut libc::c_void,
// strlen(VERSION_CONTENT.as_mut_ptr()),
// "application/pgp-encrypted",
// MAILMIME_MECHANISM_7BIT,
// )?;
// mailmime_smart_add_part(encrypted_part, version_mime);
// // we assume that ctext_v is not dropped until the end
// // of this if-scope
// let ctext_part = new_data_part(
// ctext_v.as_ptr() as *mut libc::c_void,
// ctext_v.len(),
// "application/octet-stream",
// MAILMIME_MECHANISM_7BIT,
// )?;
// mailmime_smart_add_part(encrypted_part, ctext_part);
// (*in_out_message).mm_data.mm_message.mm_msg_mime = encrypted_part;
// (*encrypted_part).mm_parent = in_out_message;
// let gossiped = !&gossip_headers.is_empty();
// factory.finalize_mime_message(true, gossiped)?;
Ok((mail_to_encrypt.build()?, true))
}
}
@@ -531,11 +524,6 @@ fn decrypt_part(
public_keyring_for_validate: &Keyring,
ret_valid_signatures: &mut HashSet<String>,
) -> Result<Option<Vec<u8>>> {
ensure!(
wrapmime::has_decryptable_data(mail),
"No decryptable data found"
);
let data = mail.get_body_raw()?;
if has_decrypted_pgp_armor(&data) {