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| /* Copyright (C) 2022 Open Information Security Foundation | ||
| * | ||
| * You can copy, redistribute or modify this Program under the terms of | ||
| * the GNU General Public License version 2 as published by the Free | ||
| * Software Foundation. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * version 2 along with this program; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | ||
| * 02110-1301, USA. | ||
| */ | ||
|
|
||
| use super::mime; | ||
| use crate::jsonbuilder::{JsonBuilder, JsonError}; | ||
| use crate::mime::smtp::{MimeSmtpMd5State, MimeStateSMTP}; | ||
| use digest::Digest; | ||
| use digest::Update; | ||
| use md5::Md5; | ||
| use std::ffi::CStr; | ||
|
|
||
| fn log_subject_md5(js: &mut JsonBuilder, ctx: &mut MimeStateSMTP) -> Result<(), JsonError> { | ||
| for h in &ctx.headers[..ctx.main_headers_nb] { | ||
| if mime::slice_equals_lowercase(&h.name, b"subject") { | ||
| let hash = format!("{:x}", Md5::new().chain(&h.value).finalize()); | ||
| js.set_string("subject_md5", &hash)?; | ||
| break; | ||
| } | ||
| } | ||
| return Ok(()); | ||
| } | ||
|
|
||
| #[no_mangle] | ||
| pub unsafe extern "C" fn SCMimeSmtpLogSubjectMd5( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, | ||
| ) -> bool { | ||
| return log_subject_md5(js, ctx).is_ok(); | ||
| } | ||
|
|
||
| fn log_body_md5(js: &mut JsonBuilder, ctx: &mut MimeStateSMTP) -> Result<(), JsonError> { | ||
| if ctx.md5_state == MimeSmtpMd5State::MimeSmtpMd5Completed { | ||
| let hash = format!("{:x}", ctx.md5_result); | ||
| js.set_string("body_md5", &hash)?; | ||
| } | ||
| return Ok(()); | ||
| } | ||
|
|
||
| #[no_mangle] | ||
| pub unsafe extern "C" fn SCMimeSmtpLogBodyMd5( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, | ||
| ) -> bool { | ||
| return log_body_md5(js, ctx).is_ok(); | ||
| } | ||
|
|
||
| fn log_field_array( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, c: &str, e: &str, | ||
| ) -> Result<(), JsonError> { | ||
| let mark = js.get_mark(); | ||
| let mut found = false; | ||
| js.open_array(c)?; | ||
|
|
||
| for h in &ctx.headers[..ctx.main_headers_nb] { | ||
| if mime::slice_equals_lowercase(&h.name, e.as_bytes()) { | ||
| found = true; | ||
| js.append_string(&String::from_utf8_lossy(&h.value))?; | ||
| } | ||
| } | ||
|
|
||
| if found { | ||
| js.close()?; | ||
| } else { | ||
| js.restore_mark(&mark)?; | ||
| } | ||
|
|
||
| return Ok(()); | ||
| } | ||
|
|
||
| #[no_mangle] | ||
| pub unsafe extern "C" fn SCMimeSmtpLogFieldArray( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, email: *const std::os::raw::c_char, | ||
| config: *const std::os::raw::c_char, | ||
| ) -> bool { | ||
| let e: &CStr = CStr::from_ptr(email); //unsafe | ||
| if let Ok(email_field) = e.to_str() { | ||
| let c: &CStr = CStr::from_ptr(config); //unsafe | ||
| if let Ok(config_field) = c.to_str() { | ||
| return log_field_array(js, ctx, config_field, email_field).is_ok(); | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| enum FieldCommaState { | ||
| Start = 0, // skip leading spaces | ||
| Field = 1, | ||
| Quoted = 2, // do not take comma for split in quote | ||
| } | ||
|
|
||
| fn log_field_comma( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, c: &str, e: &str, | ||
| ) -> Result<(), JsonError> { | ||
| for h in &ctx.headers[..ctx.main_headers_nb] { | ||
| if mime::slice_equals_lowercase(&h.name, e.as_bytes()) { | ||
| let mark = js.get_mark(); | ||
| let mut has_not_empty_field = false; | ||
| js.open_array(c)?; | ||
| let mut start = 0; | ||
| let mut state = FieldCommaState::Start; | ||
| for i in 0..h.value.len() { | ||
| match state { | ||
| FieldCommaState::Start => { | ||
| if h.value[i] == b' ' || h.value[i] == b'\t' { | ||
| start += 1; | ||
| } else if h.value[i] == b'"' { | ||
| state = FieldCommaState::Quoted; | ||
| } else { | ||
| state = FieldCommaState::Field; | ||
| } | ||
| } | ||
| FieldCommaState::Field => { | ||
| if h.value[i] == b',' { | ||
| if i > start { | ||
| js.append_string(&String::from_utf8_lossy(&h.value[start..i]))?; | ||
| has_not_empty_field = true; | ||
| } | ||
| start = i + 1; | ||
| state = FieldCommaState::Start; | ||
| } else if h.value[i] == b'"' { | ||
| state = FieldCommaState::Quoted; | ||
| } | ||
| } | ||
| FieldCommaState::Quoted => { | ||
| if h.value[i] == b'"' { | ||
| state = FieldCommaState::Field; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| if h.value.len() > start { | ||
| // do not log empty string | ||
| js.append_string(&String::from_utf8_lossy(&h.value[start..]))?; | ||
| has_not_empty_field = true; | ||
| } | ||
| if has_not_empty_field { | ||
| js.close()?; | ||
| } else { | ||
| js.restore_mark(&mark)?; | ||
| } | ||
| break; | ||
| } | ||
| } | ||
| return Ok(()); | ||
| } | ||
|
|
||
| #[no_mangle] | ||
| pub unsafe extern "C" fn SCMimeSmtpLogFieldComma( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, email: *const std::os::raw::c_char, | ||
| config: *const std::os::raw::c_char, | ||
| ) -> bool { | ||
| let e: &CStr = CStr::from_ptr(email); //unsafe | ||
| if let Ok(email_field) = e.to_str() { | ||
| let c: &CStr = CStr::from_ptr(config); //unsafe | ||
| if let Ok(config_field) = c.to_str() { | ||
| return log_field_comma(js, ctx, config_field, email_field).is_ok(); | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| fn log_field_string( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, c: &str, e: &str, | ||
| ) -> Result<(), JsonError> { | ||
| for h in &ctx.headers[..ctx.main_headers_nb] { | ||
| if mime::slice_equals_lowercase(&h.name, e.as_bytes()) { | ||
| js.set_string(c, &String::from_utf8_lossy(&h.value))?; | ||
| break; | ||
| } | ||
| } | ||
| return Ok(()); | ||
| } | ||
|
|
||
| #[no_mangle] | ||
| pub unsafe extern "C" fn SCMimeSmtpLogFieldString( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, email: *const std::os::raw::c_char, | ||
| config: *const std::os::raw::c_char, | ||
| ) -> bool { | ||
| let e: &CStr = CStr::from_ptr(email); //unsafe | ||
| if let Ok(email_field) = e.to_str() { | ||
| let c: &CStr = CStr::from_ptr(config); //unsafe | ||
| if let Ok(config_field) = c.to_str() { | ||
| return log_field_string(js, ctx, config_field, email_field).is_ok(); | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| fn log_data_header( | ||
| js: &mut JsonBuilder, ctx: &mut MimeStateSMTP, hname: &str, | ||
| ) -> Result<(), JsonError> { | ||
| for h in &ctx.headers[..ctx.main_headers_nb] { | ||
| if mime::slice_equals_lowercase(&h.name, hname.as_bytes()) { | ||
| js.set_string(hname, &String::from_utf8_lossy(&h.value))?; | ||
| break; | ||
| } | ||
| } | ||
| return Ok(()); | ||
| } | ||
|
|
||
| fn log_data(js: &mut JsonBuilder, ctx: &mut MimeStateSMTP) -> Result<(), JsonError> { | ||
| log_data_header(js, ctx, "from")?; | ||
| log_field_comma(js, ctx, "to", "to")?; | ||
| log_field_comma(js, ctx, "cc", "cc")?; | ||
|
|
||
| js.set_string("status", "PARSE_DONE")?; | ||
|
|
||
| if !ctx.attachments.is_empty() { | ||
| js.open_array("attachment")?; | ||
| for a in &ctx.attachments { | ||
| js.append_string(&String::from_utf8_lossy(a))?; | ||
| } | ||
| js.close()?; | ||
| } | ||
| if !ctx.urls.is_empty() { | ||
| js.open_array("url")?; | ||
| for a in ctx.urls.iter().rev() { | ||
| js.append_string(&String::from_utf8_lossy(a))?; | ||
| } | ||
| js.close()?; | ||
| } | ||
|
|
||
| return Ok(()); | ||
| } | ||
|
|
||
| #[no_mangle] | ||
| pub unsafe extern "C" fn SCMimeSmtpLogData(js: &mut JsonBuilder, ctx: &mut MimeStateSMTP) -> bool { | ||
| return log_data(js, ctx).is_ok(); | ||
| } |
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