Add interceptors for md2(3) from NetBSD

[krytarowski]

Summary

MD2Init, MD2Update, MD2Final, MD2End, MD2File, MD2Data - calculates the
RSA Data Security, Inc., "MD2" message digest.

Add a dedicated test.

[vitalybuka]

test/sanitizer_common/TestCases/NetBSD/md2.cc

100

maybe better names

[krytarowski]

test/sanitizer_common/TestCases/NetBSD/md2.cc

100

I have no better idea than md2_test1 or md2_test_md2data_test1 or similar.. so I will keep using the current ones.

lib/sanitizer_common/sanitizer_common_interceptors.inc

#define INIT_FSEEK \
   COMMON_INTERCEPT_FUNCTION(ftello); \
   COMMON_INTERCEPT_FUNCTION(rewind); \
   COMMON_INTERCEPT_FUNCTION(fgetpos); \
   COMMON_INTERCEPT_FUNCTION(fsetpos)
 #else
 #define INIT_FSEEK
 #endif
 
+#if SANITIZER_INTERCEPT_MD2
+INTERCEPTOR(void, MD2Init, void *context) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, MD2Init, context);
+  REAL(MD2Init)(context);
+  if (context)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, context, MD2_CTX_sz);
+}
+
+INTERCEPTOR(void, MD2Update, void *context, const unsigned char *data,
+            unsigned int len) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, MD2Update, context, data, len);
+  if (data && len > 0)
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, data, len);
+  if (context)
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, context, MD2_CTX_sz);
+  REAL(MD2Update)(context, data, len);
+  if (context)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, context, MD2_CTX_sz);
+}
+
+INTERCEPTOR(void, MD2Final, unsigned char digest[16], void *context) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, MD2Final, digest, context);
+  if (context)
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, context, MD2_CTX_sz);
+  REAL(MD2Final)(digest, context);
+  if (digest)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, digest, sizeof(unsigned char) * 16);
+}
+
+INTERCEPTOR(char *, MD2End, void *context, char *buf) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, MD2End, context, buf);
+  if (context)
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, context, MD2_CTX_sz);
+  char *ret = REAL(MD2End)(context, buf);
+  if (ret)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, MD2_return_length);
+  return ret;
+}
+
+INTERCEPTOR(char *, MD2File, const char *filename, char *buf) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, MD2File, filename, buf);
+  if (filename)
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);
+  char *ret = REAL(MD2File)(filename, buf);
+  if (ret)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, MD2_return_length);
+  return ret;
+}
+
+INTERCEPTOR(char *, MD2Data, const unsigned char *data, unsigned int len,
+            char *buf) {
+  void *ctx;
+  COMMON_INTERCEPTOR_ENTER(ctx, MD2Data, data, len, buf);
+  if (data && len > 0)
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, data, len);
+  char *ret = REAL(MD2Data)(data, len, buf);
+  if (ret)
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, MD2_return_length);
+  return ret;
+}
+
+#define INIT_MD2                                                               \
+  COMMON_INTERCEPT_FUNCTION(MD2Init);                                          \
+  COMMON_INTERCEPT_FUNCTION(MD2Update);                                        \
+  COMMON_INTERCEPT_FUNCTION(MD2Final);                                         \
+  COMMON_INTERCEPT_FUNCTION(MD2End);                                           \
+  COMMON_INTERCEPT_FUNCTION(MD2File);                                          \
+  COMMON_INTERCEPT_FUNCTION(MD2Data)
+#else
+#define INIT_MD2
+#endif
+
 static void InitializeCommonInterceptors() {
   static u64 metadata_mem[sizeof(MetadataHashMap) / sizeof(u64) + 1];
   interceptor_metadata_map =
       new ((void *)&metadata_mem) MetadataHashMap();  // NOLINT
 
   INIT_MMAP;
   INIT_MMAP64;
   INIT_TEXTDOMAIN;
static void InitializeCommonInterceptors() {
   INIT_STATVFS1;
   INIT_STRTOI;
   INIT_CAPSICUM;
   INIT_SHA1;
   INIT_MD4;
   INIT_RMD160;
   INIT_MD5;
   INIT_FSEEK;
+  INIT_MD2;
 
   INIT___PRINTF_CHK;
 }

lib/sanitizer_common/sanitizer_platform_interceptors.h

 #define SANITIZER_INTERCEPT_STATVFS1 SI_NETBSD
 #define SANITIZER_INTERCEPT_STRTOI SI_NETBSD
 #define SANITIZER_INTERCEPT_CAPSICUM SI_FREEBSD
 #define SANITIZER_INTERCEPT_SHA1 SI_NETBSD
 #define SANITIZER_INTERCEPT_MD4 SI_NETBSD
 #define SANITIZER_INTERCEPT_RMD160 SI_NETBSD
 #define SANITIZER_INTERCEPT_MD5 SI_NETBSD
 #define SANITIZER_INTERCEPT_FSEEK SI_NETBSD
+#define SANITIZER_INTERCEPT_MD2 SI_NETBSD
 
 #endif  // #ifndef SANITIZER_PLATFORM_INTERCEPTORS_H

test/sanitizer_common/TestCases/NetBSD/md2.cc

+// RUN: %clangxx -O0 -g %s -o %t && %run %t 2>&1 | FileCheck %s
+
+#include <sys/param.h>
+
+#include <assert.h>
+#include <endian.h>
+#include <md2.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void test1() {
+  MD2_CTX ctx;
+  uint8_t entropy[] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
+  uint8_t digest[MD2_DIGEST_LENGTH];
+
+  MD2Init(&ctx);
+  MD2Update(&ctx, entropy, __arraycount(entropy));
+  MD2Final(digest, &ctx);
+
+  printf("test1: '");
+  for (size_t i = 0; i < __arraycount(digest); i++)
+    printf("%02x", digest[i]);
+  printf("'\n");
+}
+
+void test2() {
+  MD2_CTX ctx;
+  uint8_t entropy[] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
+  char digest[MD2_DIGEST_STRING_LENGTH];
+
+  MD2Init(&ctx);
+  MD2Update(&ctx, entropy, __arraycount(entropy));
+  char *p = MD2End(&ctx, digest);
+  assert(p == digest);
+
+  printf("test2: '%s'\n", digest);
+}
+
+void test3() {
+  MD2_CTX ctx;
+  uint8_t entropy[] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
+
+  MD2Init(&ctx);
+  MD2Update(&ctx, entropy, __arraycount(entropy));
+  char *p = MD2End(&ctx, NULL);
+  assert(strlen(p) == MD2_DIGEST_STRING_LENGTH - 1);
+
+  printf("test3: '%s'\n", p);
+
+  free(p);
+}
+
+void test4() {
+  char digest[MD2_DIGEST_STRING_LENGTH];
+
+  char *p = MD2File("/etc/fstab", digest);
+  assert(p == digest);
+
+  printf("test4: '%s'\n", p);
+}
+
+void test5() {
+  char *p = MD2File("/etc/fstab", NULL);
+  assert(strlen(p) == MD2_DIGEST_STRING_LENGTH - 1);
+
+  printf("test5: '%s'\n", p);
+
+  free(p);
+}
+
+void test6() {
+  uint8_t entropy[] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
+  char digest[MD2_DIGEST_STRING_LENGTH];
+
+  char *p = MD2Data(entropy, __arraycount(entropy), digest);
+  assert(p == digest);
+
+  printf("test6: '%s'\n", p);
+}
+
+void test7() {
+  uint8_t entropy[] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
+
+  char *p = MD2Data(entropy, __arraycount(entropy), NULL);
+  assert(strlen(p) == MD2_DIGEST_STRING_LENGTH - 1);
+
+  printf("test7: '%s'\n", p);
+
+  free(p);
+}
+
+int main(void) {
+  printf("MD2\n");
+
+  test1();
+  test2();
+  test3();
+  test4();
+  test5();
+  test6();
+  test7();
+
+  // CHECK: MD2
+  // CHECK: test1: 'e303e49b34f981c2740cdf809200d51b'
+  // CHECK: test2: 'e303e49b34f981c2740cdf809200d51b'
+  // CHECK: test3: 'e303e49b34f981c2740cdf809200d51b'
+  // CHECK: test4: 'a409cff8627afa00f3b563cf5f09af05'
+  // CHECK: test5: 'a409cff8627afa00f3b563cf5f09af05'
+  // CHECK: test6: '{{.*}}'
+  // CHECK: test7: '{{.*}}'
+
+  return 0;
+}