--- /dev/null
+/* Copyright (C) 2024 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::{
+ DetectHelperTransformRegister, DetectSignatureAddTransform, InspectionBufferCheckAndExpand,
+ InspectionBufferLength, InspectionBufferPtr, InspectionBufferTruncate, SCTransformTableElmt,
+};
+use crate::detect::SIGMATCH_NOOPT;
+
+use std::os::raw::{c_int, c_void};
+use std::ptr;
+
+static mut G_TRANSFORM_TOLOWER_ID: c_int = 0;
+static mut G_TRANSFORM_TOUPPER_ID: c_int = 0;
+
+#[no_mangle]
+unsafe extern "C" fn tolower_setup(
+ _de: *mut c_void, s: *mut c_void, _raw: *const std::os::raw::c_char,
+) -> c_int {
+ return DetectSignatureAddTransform(s, G_TRANSFORM_TOLOWER_ID, ptr::null_mut());
+}
+
+fn tolower_transform_do(input: &[u8], output: &mut [u8]) {
+ for (i, o) in input.iter().zip(output.iter_mut()) {
+ *o = (*i).to_ascii_lowercase();
+ }
+}
+
+#[no_mangle]
+unsafe extern "C" fn tolower_transform(buffer: *mut c_void, _ctx: *mut c_void) {
+ let input = InspectionBufferPtr(buffer);
+ let input_len = InspectionBufferLength(buffer);
+ if input.is_null() || input_len == 0 {
+ return;
+ }
+ let input = build_slice!(input, input_len as usize);
+
+ let output = InspectionBufferCheckAndExpand(buffer, input_len);
+ if output.is_null() {
+ // allocation failure
+ return;
+ }
+ let output = std::slice::from_raw_parts_mut(output, input_len as usize);
+
+ tolower_transform_do(input, output);
+
+ InspectionBufferTruncate(buffer, input_len);
+}
+
+#[no_mangle]
+unsafe extern "C" fn tolower_validate(content: *const u8, len: u16, _ctx: *mut c_void) -> bool {
+ let input = build_slice!(content, len as usize);
+ for &c in input {
+ if c.is_ascii_uppercase() {
+ return false;
+ }
+ }
+ return true;
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn DetectTransformToLowerRegister() {
+ let kw = SCTransformTableElmt {
+ name: b"to_lowercase\0".as_ptr() as *const libc::c_char,
+ desc: b"convert buffer to lowercase\0".as_ptr() as *const libc::c_char,
+ url: b"/rules/transforms.html#to_lowercase\0".as_ptr() as *const libc::c_char,
+ Setup: tolower_setup,
+ flags: SIGMATCH_NOOPT,
+ Transform: tolower_transform,
+ Free: None,
+ TransformValidate: Some(tolower_validate),
+ };
+ unsafe {
+ G_TRANSFORM_TOLOWER_ID = DetectHelperTransformRegister(&kw);
+ if G_TRANSFORM_TOLOWER_ID < 0 {
+ SCLogWarning!("Failed registering transform tolower");
+ }
+ }
+}
+
+#[no_mangle]
+unsafe extern "C" fn toupper_setup(
+ _de: *mut c_void, s: *mut c_void, _raw: *const std::os::raw::c_char,
+) -> c_int {
+ return DetectSignatureAddTransform(s, G_TRANSFORM_TOUPPER_ID, ptr::null_mut());
+}
+
+fn toupper_transform_do(input: &[u8], output: &mut [u8]) {
+ for (i, o) in input.iter().zip(output.iter_mut()) {
+ *o = (*i).to_ascii_uppercase();
+ }
+}
+
+#[no_mangle]
+unsafe extern "C" fn toupper_transform(buffer: *mut c_void, _ctx: *mut c_void) {
+ let input = InspectionBufferPtr(buffer);
+ let input_len = InspectionBufferLength(buffer);
+ if input.is_null() || input_len == 0 {
+ return;
+ }
+ let input = build_slice!(input, input_len as usize);
+
+ let output = InspectionBufferCheckAndExpand(buffer, input_len);
+ if output.is_null() {
+ // allocation failure
+ return;
+ }
+ let output = std::slice::from_raw_parts_mut(output, input_len as usize);
+
+ toupper_transform_do(input, output);
+
+ InspectionBufferTruncate(buffer, input_len);
+}
+
+#[no_mangle]
+unsafe extern "C" fn toupper_validate(content: *const u8, len: u16, _ctx: *mut c_void) -> bool {
+ let input = build_slice!(content, len as usize);
+ for &c in input {
+ if c.is_ascii_lowercase() {
+ return false;
+ }
+ }
+ return true;
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn DetectTransformToUpperRegister() {
+ let kw = SCTransformTableElmt {
+ name: b"to_uppercase\0".as_ptr() as *const libc::c_char,
+ desc: b"convert buffer to uppercase\0".as_ptr() as *const libc::c_char,
+ url: b"/rules/transforms.html#to_uppercase\0".as_ptr() as *const libc::c_char,
+ Setup: toupper_setup,
+ flags: SIGMATCH_NOOPT,
+ Transform: toupper_transform,
+ Free: None,
+ TransformValidate: Some(toupper_validate),
+ };
+ unsafe {
+ G_TRANSFORM_TOUPPER_ID = DetectHelperTransformRegister(&kw);
+ if G_TRANSFORM_TOUPPER_ID < 0 {
+ SCLogWarning!("Failed registering transform toupper");
+ }
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn test_tolower_transform() {
+ let buf = b" A b C D ";
+ let mut out = vec![0; buf.len()];
+ tolower_transform_do(buf, &mut out);
+ assert_eq!(out, b" a b c d ");
+ }
+
+ #[test]
+ fn test_toupper_transform() {
+ let buf = b" A b C D ";
+ let mut out = vec![0; buf.len()];
+ toupper_transform_do(buf, &mut out);
+ assert_eq!(out, b" A B C D ");
+ }
+}
use std::os::raw::{c_char, c_int, c_void};
+pub mod casechange;
pub mod compress_whitespace;
pub mod dotprefix;
-pub mod strip_whitespace;
pub mod hash;
+pub mod strip_whitespace;
#[repr(C)]
#[allow(non_snake_case)]
detect-tls-random.h \
detect-tos.h \
detect-transform-base64.h \
- detect-transform-casechange.h \
detect-transform-header-lowercase.h \
detect-transform-pcrexform.h \
detect-transform-strip-pseudo-headers.h \
detect-tls-random.c \
detect-tos.c \
detect-transform-base64.c \
- detect-transform-casechange.c \
detect-transform-header-lowercase.c \
detect-transform-pcrexform.c \
detect-transform-strip-pseudo-headers.c \
#include "detect-transform-pcrexform.h"
#include "detect-transform-urldecode.h"
#include "detect-transform-xor.h"
-#include "detect-transform-casechange.h"
#include "detect-transform-header-lowercase.h"
#include "detect-transform-base64.h"
+++ /dev/null
-/* Copyright (C) 2023 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.
- */
-
-/**
- * \file
- *
- * \author Jeff Lucovsky <jlucovsky@oisf.net>
- *
- * Implements case changing transforms
- */
-
-#include "suricata-common.h"
-#include "detect.h"
-#include "detect-engine.h"
-#include "detect-parse.h"
-#include "detect-transform-casechange.h"
-
-/**
- * \internal
- * \brief Register the to_lowercase transform
- * \param det_ctx detection engine ctx
- * \param s signature
- * \param optstr options string
- * \retval 0 ok
- * \retval -1 failure
- */
-static int DetectTransformToLowerSetup(DetectEngineCtx *de_ctx, Signature *s, const char *optstr)
-{
- SCEnter();
-
- int r = DetectSignatureAddTransform(s, DETECT_TRANSFORM_TOLOWER, NULL);
-
- SCReturnInt(r);
-}
-
-/**
- * \internal
- * \brief Apply the to_lowercase keyword to the last pattern match
- * \param buffer Inspection buffer
- * \param optstr options string
- */
-static void DetectTransformToLower(InspectionBuffer *buffer, void *options)
-{
- const uint8_t *input = buffer->inspect;
- const uint32_t input_len = buffer->inspect_len;
-
- if (input_len == 0) {
- return;
- }
-
- uint8_t output[input_len];
- for (uint32_t i = 0; i < input_len; i++) {
- output[i] = u8_tolower(input[i]);
- }
-
- InspectionBufferCopy(buffer, output, input_len);
-}
-/**
- * \internal
- * \brief Register the to_upperrcase transform
- * \param det_ctx detection engine ctx
- * \param s signature
- * \param optstr options string
- * \retval 0 ok
- * \retval -1 failure
- */
-static int DetectTransformToUpperSetup(DetectEngineCtx *de_ctx, Signature *s, const char *optstr)
-{
- SCEnter();
-
- int r = DetectSignatureAddTransform(s, DETECT_TRANSFORM_TOUPPER, NULL);
-
- SCReturnInt(r);
-}
-
-/**
- * \internal
- * \brief Apply the to_uppercase keyword to the last pattern match
- * \param buffer Inspection buffer
- * \param optstr options string
- */
-static void DetectTransformToUpper(InspectionBuffer *buffer, void *options)
-{
- const uint8_t *input = buffer->inspect;
- const uint32_t input_len = buffer->inspect_len;
-
- if (input_len == 0) {
- return;
- }
-
- uint8_t output[input_len];
- for (uint32_t i = 0; i < input_len; i++) {
- output[i] = u8_toupper(input[i]);
- }
-
- InspectionBufferCopy(buffer, output, input_len);
-}
-
-/*
- * \internal
- * \brief Check if content is compatible with transform
- *
- * If the content contains any lowercase characters, than it is not compatible.
- */
-static bool TransformToUpperValidate(const uint8_t *content, uint16_t content_len, void *options)
-{
- if (content) {
- for (uint32_t i = 0; i < content_len; i++) {
- if (islower(*content++)) {
- return false;
- }
- }
- }
- return true;
-}
-
-/*
- * \internal
- * \brief Check if content is compatible with transform
- *
- * If the content contains any uppercase characters, than it is not compatible.
- */
-static bool TransformToLowerValidate(const uint8_t *content, uint16_t content_len, void *options)
-{
- if (content) {
- for (uint32_t i = 0; i < content_len; i++) {
- if (isupper(*content++)) {
- return false;
- }
- }
- }
- return true;
-}
-
-void DetectTransformToUpperRegister(void)
-{
- sigmatch_table[DETECT_TRANSFORM_TOUPPER].name = "to_uppercase";
- sigmatch_table[DETECT_TRANSFORM_TOUPPER].desc = "convert buffer to uppercase";
- sigmatch_table[DETECT_TRANSFORM_TOUPPER].url = "/rules/transforms.html#to_uppercase";
- sigmatch_table[DETECT_TRANSFORM_TOUPPER].Transform = DetectTransformToUpper;
- sigmatch_table[DETECT_TRANSFORM_TOUPPER].TransformValidate = TransformToUpperValidate;
- sigmatch_table[DETECT_TRANSFORM_TOUPPER].Setup = DetectTransformToUpperSetup;
- sigmatch_table[DETECT_TRANSFORM_TOUPPER].flags |= SIGMATCH_NOOPT;
-}
-
-void DetectTransformToLowerRegister(void)
-{
- sigmatch_table[DETECT_TRANSFORM_TOLOWER].name = "to_lowercase";
- sigmatch_table[DETECT_TRANSFORM_TOLOWER].desc = "convert buffer to lowercase";
- sigmatch_table[DETECT_TRANSFORM_TOLOWER].url = "/rules/transforms.html#to_lowercase";
- sigmatch_table[DETECT_TRANSFORM_TOLOWER].Transform = DetectTransformToLower;
- sigmatch_table[DETECT_TRANSFORM_TOLOWER].TransformValidate = TransformToLowerValidate;
- sigmatch_table[DETECT_TRANSFORM_TOLOWER].Setup = DetectTransformToLowerSetup;
- sigmatch_table[DETECT_TRANSFORM_TOLOWER].flags |= SIGMATCH_NOOPT;
-}
+++ /dev/null
-/* Copyright (C) 2023 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.
- */
-
-/**
- * \file
- *
- * \author Jeff Lucovsky <jlucovsky@oisf.net>
- */
-
-#ifndef SURICATA_DETECT_TRANSFORM_CASECHANGE_H
-#define SURICATA_DETECT_TRANSFORM_CASECHANGE_H
-
-/* prototypes */
-void DetectTransformToLowerRegister(void);
-void DetectTransformToUpperRegister(void);
-
-#endif /* SURICATA_DETECT_TRANSFORM_CASECHANGE_H */
projects / thirdparty / suricata.git / commitdiff
