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ne0h
Joined: 21 Feb 2008
Posts: 386
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 Posted: Sat Sep 06, 2008 9:26 pm Post subject: Trying to simply load a file in a buffer |
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Hi,
I'm trying to load a file in a buffer, but I've some problems
| Code: |
static u8 g_dataOut[3000000] __attribute__((aligned(0x40)));
static u8* g_dataOut2;
int Decrypt_file(const char* name, const char* dstname)
{
Init(); // initialize the screen
SceUID fd;
if(!(fd = sceIoOpen(name, PSP_O_RDONLY, 0777)))
{
printf("Error opening file");
sleep(1000000);
}
SceOff off = sceIoLseek(fd, 0, SEEK_END);
sceIoLseek(fd, 0, SEEK_SET);
int read = sceIoRead(fd, g_dataOut2, off);
if(read != off)
{
printf("Error reading file");
printf("%d of %d bytes readed\n", read, (int)off);
sleep(1000000);
}
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the output of this is: Error reading file -2901839843 ( or something like it) of 30128 bytes readed
and the PSP crash when try to access to the buffer, but off variable contains the correct size, so the file is loaded succesfull!
Please help, the code is very simple but I got this error, why? |
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Jim
Joined: 02 Jul 2005
Posts: 487
Location: Sydney
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| Posted: Sat Sep 06, 2008 9:32 pm Post subject: |
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What does g_dataOut2 point at? Right now you're reading the file into memory you don't own.
Jim
_________________
http://www.dbfinteractive.com |
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ne0h
Joined: 21 Feb 2008
Posts: 386
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| Posted: Sat Sep 06, 2008 9:49 pm Post subject: |
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Doesn't sceIoRead read a buffer from a file and "copy" it in a buffer?
I think that sceIoRead read a buffer lenght ( variable off ) from the file fd and copy that in a buffer ( g_dataOut2 ), g_dataOut2 has to point somewhere? |
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Noko
Joined: 06 Sep 2008
Posts: 23
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| Posted: Sat Sep 06, 2008 10:20 pm Post subject: |
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g_dataOut2 is not a buffer, it's a pointer.
change your second line to | Code: | | static u8* g_dataOut2=g_dataOut; |
By the way, why are you aligning g_dataOut? |
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Torch
Joined: 28 May 2008
Posts: 842
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| Posted: Sat Sep 06, 2008 10:32 pm Post subject: |
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After you sceIoLseek to read the file size into off, you must allocate memory to g_dataOut2 like this:
| Code: | SceUID blockid = sceKernelAllocPartitionMemory(2, "block", 0, (sizeof(unsigned char) * off), NULL);
if (blockid < 0)
{
printf("Memory allocation error.");
}
g_dataOut2 = (unsigned char*) sceKernelGetBlockHeadAddr(blockid); |
For consistency sake you should declare
static unsigned char* g_dataOut2;
But u8 is the same anyway.
The above is assuming that you want to store the data at g_dataOut2.
If you want to store the data in g_dataOut then all you have to do is change it like this:
| Code: | | int read = sceIoRead(fd, &g_dataOut, off); |
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ne0h
Joined: 21 Feb 2008
Posts: 386
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| Posted: Sat Sep 06, 2008 11:42 pm Post subject: |
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| Thanks Torch, I've don't think to allocate the memory ( I've thinked that the memory is automatically allocated by the function, anyway, can I allocate the memory with malloc? |
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TyRaNiD
Joined: 18 Jan 2004
Posts: 918
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| Posted: Sat Sep 06, 2008 11:44 pm Post subject: |
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| Aligning read buffer to 64bytes can be beneficial, especially when reading/writing to usbhost (cause I know how I implemented that). |
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ne0h
Joined: 21 Feb 2008
Posts: 386
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| Posted: Sun Sep 07, 2008 5:13 am Post subject: |
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mmm, the PSP crash everytimes!
Here is the complete code:
| Code: |
// static u8 g_dataOut[3000000] __attribute__((aligned(0x40)));
static u8 g_dataOut[3000000];
static u8* g_dataOut2;
int Decrypt_file(const char* name, const char* dstname)
{
Init();
printf("Init");
SceUID fd;
if(!(fd = sceIoOpen(name, PSP_O_RDONLY, 0777)))
{
printf("Error opening file");
sleep(1000000);
}
SceOff off = sceIoLseek(fd, 0, SEEK_END);
sceIoLseek(fd, 0, SEEK_SET);
g_dataOut2 = (u8*)malloc_64((sizeof(u8))*off);
int read = sceIoRead(fd, &g_dataOut2, off);
sceIoClose(fd);
if(read != off)
{
printf("Error reading file");
printf("%d of %d bytes readed\n", read, (int)off);
sleep(1000000);
}
int ret = pspDecryptCode_Start();
if(sceKernelDevkitVersion() >= 0x03080010)
{
if(ret == 2)
printf("You HAVE NATIVE support for KL3E and 2LRZ now.");
else if(ret == 1)
printf("You HAVE NATIVE support for KL3E, but not 2LRZ. \nYou CAN'T decompress <=3.73 firmwares");
else if(!ret)
printf("You DON'T have NATIVE support for KL3E and 2LRZ.\nYou CAN'T decompress <=3.73 firmwares and \nreboot.bin in >=3.80");
else
printf("Unknow support...");
}
else
{
printf("\nThis utility need >= 3.80 firmware to run, please update your CF! ;)");
sleep(3000000);
return 1;
}
if ((memcmp(&g_dataOut2, "~PSP", 4) == 0))
{
printf("\n\nDecrypting");
int cbDecrypted = pspDecryptPRX(g_dataOut2, g_dataOut, off); // Here the programm crash!
printf("\n\nDecrypted");
if (cbDecrypted > 0)
{
if ((g_dataOut[0] == 0x1F && g_dataOut[1] == 0x8B) || memcmp(g_dataOut, "2RLZ", 4) == 0 || memcmp(g_dataOut, "KL4E", 4) == 0)
{
printf("Expanding...OK!");
int cbExp = pspDecompress(g_dataOut, g_dataOut2, sizeof(g_dataOut));
if (cbExp > 0)
{
printf("Expanding again...OK!");
}
else
{
printf("Decompress error\n"
"File will be written compressed.\n");
}
}
}
else
{
printf("Error in decryption.\n");
sleep(2000000);
}
}
printf("\nWriting file!\n");
SceUID newfile = sceIoOpen(dstname, PSP_O_ALLWR, 0777);
int bytes = sceIoWrite(newfile, g_dataOut, sizeof((u8)*g_dataOut));
sceIoClose(newfile);
printf("%d bytes writted", bytes);
sleep(2000000);
return 0;
}
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Jim
Joined: 02 Jul 2005
Posts: 487
Location: Sydney
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| Posted: Sun Sep 07, 2008 10:29 am Post subject: |
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| Code: |
static u8* g_dataOut2;
...
g_dataOut2 = (u8*)malloc_64((sizeof(u8))*off);
...
int read = sceIoRead(fd, &g_dataOut2, off);
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should be
| Code: |
int read = sceIoRead(fd, g_dataOut2, off);
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Jim
_________________
http://www.dbfinteractive.com |
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ne0h
Joined: 21 Feb 2008
Posts: 386
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| Posted: Sun Sep 07, 2008 8:35 pm Post subject: |
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???
What about the post of Torch? |
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Jim
Joined: 02 Jul 2005
Posts: 487
Location: Sydney
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| Posted: Sun Sep 07, 2008 9:21 pm Post subject: |
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What about it? Either you know how pointers work or you don't. Why are you passing the address of the pointer and not the pointer??? I'm fucking baffled.
Jim
_________________
http://www.dbfinteractive.com |
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ne0h
Joined: 21 Feb 2008
Posts: 386
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| Posted: Sun Sep 07, 2008 10:03 pm Post subject: |
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I don't know
This is my code now and it crash in the memcmp function and I've error reading file -121243423235 of 30128 bytes readed, but why?
The file is opened correctly because Lseek return the correct size of the file!
| Code: |
static u8 g_dataOut[3000000];
static u8* g_dataOut2;
int Decrypt_file(const char* name, const char* dstname)
{
Init();
printf("Init");
SceUID fd;
if(!(fd = sceIoOpen(name, PSP_O_RDONLY, 0777)))
{
printf("Error opening file");
sleep(1000000);
}
SceOff off = sceIoLseek(fd, 0, SEEK_END);
sceIoLseek(fd, 0, SEEK_SET);
// g_dataOut2 = (u8*)malloc_64((sizeof(u8))*off);
int read = sceIoRead(fd, g_dataOut2, off);
sceIoClose(fd);
if(read != off)
{
printf("Error reading file");
printf("%d of %d bytes readed\n", read, (int)off);
sleep(1000000);
}
int ret = pspDecryptCode_Start();
if(sceKernelDevkitVersion() >= 0x03080010)
{
if(ret == 2)
printf("You HAVE NATIVE support for KL3E and 2LRZ now.");
else if(ret == 1)
printf("You HAVE NATIVE support for KL3E, but not 2LRZ. \nYou CAN'T decompress <=3.73 firmwares");
else if(!ret)
printf("You DON'T have NATIVE support for KL3E and 2LRZ.\nYou CAN'T decompress <=3.73 firmwares and \nreboot.bin in >=3.80");
else
printf("Unknow support...");
}
else
{
printf("\nThis utility need >= 3.80 firmware to run, please update your CF! ;)");
sleep(3000000);
return 1;
}
if ((memcmp(g_dataOut2, "~PSP", 4) == 0))
{
printf("\n\nDecrypting");
int cbDecrypted = pspDecryptPRX(g_dataOut2, g_dataOut, off);
printf("\n\nDecrypted");
if (cbDecrypted > 0)
{
if ((g_dataOut[0] == 0x1F && g_dataOut[1] == 0x8B) || memcmp(g_dataOut, "2RLZ", 4) == 0 || memcmp(g_dataOut, "KL4E", 4) == 0)
{
printf("Expanding...OK!");
int cbExp = pspDecompress(g_dataOut, g_dataOut2, sizeof(g_dataOut));
if (cbExp > 0)
{
printf("Expanding again...OK!");
}
else
{
printf("Decompress error\n"
"File will be written compressed.\n");
}
}
}
else
{
printf("Error in decryption.\n");
sleep(2000000);
}
}
printf("\nWriting file!\n");
SceUID newfile = sceIoOpen(dstname, PSP_O_ALLWR, 0777);
int bytes = sceIoWrite(newfile, g_dataOut, sizeof((u8)*g_dataOut));
sceIoClose(newfile);
printf("%d bytes writted", bytes);
sleep(2000000);
return 0;
}
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J.F.
Joined: 22 Feb 2004
Posts: 2906
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| Posted: Sun Sep 07, 2008 10:39 pm Post subject: |
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| Your g_dataOut2 pointer doesn't seem to be set above. You have the memory allocation commented out. |
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ne0h
Joined: 21 Feb 2008
Posts: 386
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| Posted: Sun Sep 07, 2008 11:20 pm Post subject: |
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O.o
Sorry!
Ok, I've tryied to decrypt a 3.71 fw prx, I have Error in decryption but can be another problem...
Thanks to all! |
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