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Code Issues Releases Wiki Activity

avoid processing crc32 if the unpacked size is not the expected

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This commit is contained in:
Gabriele Gristina 2025-04-24 11:16:54 +02:00
parent c105104b92
commit 21a471139a
5 changed files with 18 additions and 8 deletions
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4
OpenCL/m23800-optimized.cl
View File

@ -44,6 +44,8 @@ typedef struct rar3_hook
u32 first_block_decrypted[4];
u32 unpack_failed;
u32 crc32;
} rar3_hook_t;
@ -495,6 +497,8 @@ KERNEL_FQ void m23800_comp (KERN_ATTR_TMPS_HOOKS_ESALT (rar3_tmp_t, rar3_hook_t,
if (gid >= GID_CNT) return;
if (hooks[gid].unpack_failed == 1) return;
u32 crc32 = hooks[gid].crc32;
const u32 r0 = crc32;

4
OpenCL/m23800-pure.cl
View File

@ -42,6 +42,8 @@ typedef struct rar3_hook
u32 first_block_decrypted[4];
u32 unpack_failed;
u32 crc32;
} rar3_hook_t;
@ -1096,6 +1098,8 @@ KERNEL_FQ void m23800_comp (KERN_ATTR_TMPS_HOOKS_ESALT (rar3_tmp_t, rar3_hook_t,
if (gid >= GID_CNT) return;
if (hooks[gid].unpack_failed == 1) return;
u32 crc32 = hooks[gid].crc32;
const u32 r0 = crc32;

6
deps/unrar/hc_decompress_rar.cpp vendored
View File

@ -12,7 +12,7 @@
#define SOLID false
#define METHOD VER_UNPACK // 29 for RAR3 archives
extern "C" unsigned int hc_decompress_rar (unsigned char *Win, unsigned char *Inp, unsigned char *VM, unsigned char *PPM, const unsigned int OutputSize, const unsigned char *Input, const unsigned int PackSize, const unsigned int UnpackSize, const unsigned char *Key, const unsigned char *IV)
extern "C" unsigned int hc_decompress_rar (unsigned char *Win, unsigned char *Inp, unsigned char *VM, unsigned char *PPM, const unsigned int OutputSize, const unsigned char *Input, const unsigned int PackSize, const unsigned int UnpackSize, const unsigned char *Key, const unsigned char *IV, unsigned int *unpack_failed)
{
ComprDataIO DataIO;
@ -47,9 +47,7 @@ extern "C" unsigned int hc_decompress_rar (unsigned char *Win, unsigned char *In
Unp.DoUnpack (METHOD, SOLID); // sets output
unsigned int wfs = (unsigned int) Unp.GetWrittenFileSize();
if (wfs != UnpackSize) return 0;
*unpack_failed = (Unp.WrittenFileSize != UnpackSize);
unsigned int crc32 = (unsigned int) DataIO.UnpHash.GetCRC32 ();

4
deps/unrar/unpack.hpp vendored
View File

@ -279,7 +279,6 @@ class Unpack:PackDef
bool Suspended;
bool UnpAllBuf;
bool UnpSomeRead;
int64 WrittenFileSize;
bool FileExtracted;
@ -383,13 +382,14 @@ class Unpack:PackDef
bool IsFileExtracted() {return(FileExtracted);}
void SetDestSize(int64 DestSize) {DestUnpSize=DestSize;FileExtracted=false;}
void SetSuspended(bool Suspended) {Unpack::Suspended=Suspended;}
int64 GetWrittenFileSize() {return(WrittenFileSize);}
#ifdef RAR_SMP
void SetThreads(uint Threads);
void UnpackDecode(UnpackThreadData &D);
#endif
int64 WrittenFileSize;
byte *hcwin;
byte *hcppm;

8
src/modules/module_23800.c
View File

@ -73,6 +73,8 @@ typedef struct rar3_hook
u32 first_block_decrypted[4];
u32 unpack_failed;
u32 crc32;
} rar3_hook_t;
@ -286,7 +288,7 @@ bool module_hook_extra_param_term (MAYBE_UNUSED const hashconfig_t *hashconfig,
return true;
}
unsigned int hc_decompress_rar (unsigned char *Win, unsigned char *Inp, unsigned char *VM, unsigned char *PPM, const unsigned int OutputSize, const unsigned char *Input, const unsigned int PackSize, const unsigned int UnpackSize, const unsigned char *Key, const unsigned char *IV);
unsigned int hc_decompress_rar (unsigned char *Win, unsigned char *Inp, unsigned char *VM, unsigned char *PPM, const unsigned int OutputSize, const unsigned char *Input, const unsigned int PackSize, const unsigned int UnpackSize, const unsigned char *Key, const unsigned char *IV, unsigned int *unpack_failed);
void module_hook23 (hc_device_param_t *device_param, const void *hook_extra_param, const void *hook_salts_buf, const u32 salt_pos, const u64 pw_pos)
{
@ -328,7 +330,9 @@ void module_hook23 (hc_device_param_t *device_param, const void *hook_extra_para
const u8 *key = (u8 *) hook_item->key;
const u8 *iv = (u8 *) hook_item->iv;
const u32 crc32 = hc_decompress_rar (rar3_hook_extra->win[device_param->device_id], rar3_hook_extra->inp[device_param->device_id], rar3_hook_extra->vm[device_param->device_id], rar3_hook_extra->ppm[device_param->device_id], unpack_size, data, pack_size, unpack_size, key, iv);
hook_item->unpack_failed = 1;
const u32 crc32 = hc_decompress_rar (rar3_hook_extra->win[device_param->device_id], rar3_hook_extra->inp[device_param->device_id], rar3_hook_extra->vm[device_param->device_id], rar3_hook_extra->ppm[device_param->device_id], unpack_size, data, pack_size, unpack_size, key, iv, &hook_item->unpack_failed);
hook_item->crc32 = crc32;
}