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Turn the function safe

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This commit is contained in:
Floris Bruynooghe
2019-08-01 21:29:21 +02:00
committed by Floris Bruynooghe
parent c568d5dcac
commit d37dda6f50
3 changed files with 100 additions and 143 deletions
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167
src/dc_imex.rs
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@@ -14,6 +14,7 @@ use crate::dc_e2ee::*;
use crate::dc_job::*;
use crate::dc_msg::*;
use crate::dc_tools::*;
use crate::error::*;
use crate::key::*;
use crate::param::*;
use crate::pgp::*;
@@ -99,13 +100,12 @@ pub unsafe fn dc_imex_has_backup(
}
pub unsafe fn dc_initiate_key_transfer(context: &Context) -> *mut libc::c_char {
let mut setup_file_content: *mut libc::c_char = 0 as *mut libc::c_char;
let mut setup_file_name: *mut libc::c_char = 0 as *mut libc::c_char;
let mut msg: *mut dc_msg_t = 0 as *mut dc_msg_t;
if dc_alloc_ongoing(context) == 0 {
return std::ptr::null_mut();
}
let setup_code = CString::new(dc_create_setup_code(context)).unwrap();
let setup_code = dc_create_setup_code(context);
/* this may require a keypair to be created. this may take a second ... */
if !context
.running_state
@@ -114,8 +114,8 @@ pub unsafe fn dc_initiate_key_transfer(context: &Context) -> *mut libc::c_char {
.unwrap()
.shall_stop_ongoing
{
setup_file_content = dc_render_setup_file(context, setup_code.as_ptr());
if !setup_file_content.is_null() {
if let Ok(setup_file_content) = dc_render_setup_file(context, &setup_code) {
let setup_file_content_c = CString::yolo(setup_file_content.as_str());
/* encrypting may also take a while ... */
if !context
.running_state
@@ -133,8 +133,8 @@ pub unsafe fn dc_initiate_key_transfer(context: &Context) -> *mut libc::c_char {
|| 0 == dc_write_file(
context,
setup_file_name,
setup_file_content as *const libc::c_void,
strlen(setup_file_content),
setup_file_content_c.as_ptr() as *const libc::c_void,
setup_file_content_c.as_bytes().len(),
))
{
let chat_id = dc_create_chat_by_contact_id(context, 1i32 as uint32_t);
@@ -188,79 +188,78 @@ pub unsafe fn dc_initiate_key_transfer(context: &Context) -> *mut libc::c_char {
}
}
free(setup_file_name as *mut libc::c_void);
free(setup_file_content as *mut libc::c_void);
dc_msg_unref(msg);
dc_free_ongoing(context);
dc_strdup(setup_code.as_ptr())
setup_code.strdup()
}
pub unsafe fn dc_render_setup_file(
context: &Context,
passphrase: *const libc::c_char,
) -> *mut libc::c_char {
let mut ret_setupfilecontent: *mut libc::c_char = 0 as *mut libc::c_char;
if !(passphrase.is_null() || strlen(passphrase) < 2) {
/* create the payload */
if !(0 == dc_ensure_secret_key_exists(context)) {
let self_addr = context
.sql
.get_config(context, Config::ConfiguredAddr)
.unwrap_or_default();
let curr_private_key = Key::from_self_private(context, self_addr, &context.sql);
let e2ee_enabled = context
.sql
.get_config_int(context, Config::E2eeEnabled)
.unwrap_or_else(|| 1);
let headers = if 0 != e2ee_enabled {
Some(("Autocrypt-Prefer-Encrypt", "mutual"))
} else {
None
};
if let Some(payload_key_asc) = curr_private_key.map(|k| k.to_asc(headers)) {
let payload_key_asc_c = CString::new(payload_key_asc).unwrap();
if let Some(encr) = dc_pgp_symm_encrypt(
passphrase,
payload_key_asc_c.as_ptr() as *const libc::c_void,
payload_key_asc_c.as_bytes().len(),
) {
let replacement = format!(
concat!(
"-----BEGIN PGP MESSAGE-----\r\n",
"Passphrase-Format: numeric9x4\r\n",
"Passphrase-Begin: {}"
),
&as_str(passphrase)[..2]
);
let pgp_msg = encr.replace("-----BEGIN PGP MESSAGE-----", &replacement);
let msg_subj = context.stock_str(StockMessage::AcSetupMsgSubject);
let msg_body = context.stock_str(StockMessage::AcSetupMsgBody);
let msg_body_head: &str = msg_body.split('\r').next().unwrap();
let msg_body_html = msg_body_head.replace("\n", "<br>");
ret_setupfilecontent = to_cstring(format!(
concat!(
"<!DOCTYPE html>\r\n",
"<html>\r\n",
" <head>\r\n",
" <title>{}</title>\r\n",
" </head>\r\n",
" <body>\r\n",
" <h1>{}</h1>\r\n",
" <p>{}</p>\r\n",
" <pre>\r\n{}\r\n</pre>\r\n",
" </body>\r\n",
"</html>\r\n"
),
msg_subj, msg_subj, msg_body_html, pgp_msg
));
}
}
}
pub fn dc_render_setup_file(context: &Context, passphrase: &str) -> Result<String> {
ensure!(
passphrase.len() >= 2,
"Passphrase must be at least 2 chars long."
);
unsafe {
ensure!(
!(dc_ensure_secret_key_exists(context) == 0),
"No secret key available."
);
}
ret_setupfilecontent
let self_addr = context
.get_config(Config::ConfiguredAddr)
.ok_or(format_err!("Failed to get self address."))?;
let private_key = Key::from_self_private(context, self_addr, &context.sql)
.ok_or(format_err!("Failed to get private key."))?;
let ac_headers = match context
.sql
.get_config_int(context, Config::E2eeEnabled)
.unwrap_or(1)
{
0 => None,
_ => Some(("Autocrypt-Prefer-Encrypt", "mutual")),
};
let private_key_asc = private_key.to_asc(ac_headers);
let encr = {
let private_key_asc_c = CString::yolo(private_key_asc);
let passphrase_c = CString::yolo(passphrase);
dc_pgp_symm_encrypt(
passphrase_c.as_ptr(),
private_key_asc_c.as_ptr() as *const libc::c_void,
private_key_asc_c.as_bytes().len(),
)
.ok_or(format_err!("Failed to encrypt private key."))?
};
let replacement = format!(
concat!(
"-----BEGIN PGP MESSAGE-----\r\n",
"Passphrase-Format: numeric9x4\r\n",
"Passphrase-Begin: {}"
),
&passphrase[..2]
);
let pgp_msg = encr.replace("-----BEGIN PGP MESSAGE-----", &replacement);
let msg_subj = context.stock_str(StockMessage::AcSetupMsgSubject);
let msg_body = context.stock_str(StockMessage::AcSetupMsgBody);
// let msg_body_head: &str = msg_body.split('\r').next().unwrap();
// let msg_body_html = msg_body_head.replace("\n", "<br>");
let msg_body_html = msg_body.replace("\n", "<br>");
Ok(format!(
concat!(
"<!DOCTYPE html>\r\n",
"<html>\r\n",
" <head>\r\n",
" <title>{}</title>\r\n",
" </head>\r\n",
" <body>\r\n",
" <h1>{}</h1>\r\n",
" <p>{}</p>\r\n",
" <pre>\r\n{}\r\n</pre>\r\n",
" </body>\r\n",
"</html>\r\n"
),
msg_subj, msg_subj, msg_body_html, pgp_msg
))
}
pub fn dc_create_setup_code(_context: &Context) -> String {
@@ -1427,12 +1426,7 @@ mod tests {
let t = test_context(Some(logging_cb));
create_alice_keypair(&t.ctx); // Trick things to think we're configured.
let msg = unsafe {
to_string(dc_render_setup_file(
&t.ctx,
b"hello\x00" as *const u8 as *const libc::c_char,
))
};
let msg = dc_render_setup_file(&t.ctx, "hello").unwrap();
println!("{}", &msg);
// Check some substrings, indicating things got substituted.
// In particular note the mixing of `\r\n` and `\n` depending
@@ -1446,4 +1440,19 @@ mod tests {
assert!(msg.contains("==\n"));
assert!(msg.contains("-----END PGP MESSAGE-----\n"));
}
#[test]
fn test_create_setup_code() {
let t = dummy_context();
let setupcode = dc_create_setup_code(&t.ctx);
assert_eq!(setupcode.len(), 44);
assert_eq!(setupcode.chars().nth(4).unwrap(), '-');
assert_eq!(setupcode.chars().nth(9).unwrap(), '-');
assert_eq!(setupcode.chars().nth(14).unwrap(), '-');
assert_eq!(setupcode.chars().nth(19).unwrap(), '-');
assert_eq!(setupcode.chars().nth(24).unwrap(), '-');
assert_eq!(setupcode.chars().nth(29).unwrap(), '-');
assert_eq!(setupcode.chars().nth(34).unwrap(), '-');
assert_eq!(setupcode.chars().nth(39).unwrap(), '-');
}
}