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Fix: Unaligned file lengths in virtual TADs

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Thanks @zoogie for pointing that one out.
This commit is contained in:
d0k3 2017-11-22 01:35:31 +01:00
parent c18ac35d45
commit 75791f1908
1 changed files with 3 additions and 1 deletions
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4
arm9/source/filesys/sddata.c
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@ -121,7 +121,9 @@ FRESULT fx_decrypt_dsiware (FIL* fp, void* buff, FSIZE_t ofs, UINT len) {
// decrypt last block // decrypt last block
if (data_pos < data_end) { if (data_pos < data_end) {
u8* lbuff = (u8*) buff + (data_pos - ofs); u8* lbuff = (u8*) buff + (data_pos - ofs);
memcpy(block, lbuff, data_end - data_pos); // memcpy(block, lbuff, data_end - data_pos); // <--- this should work, but it doesn't
if ((res = f_lseek(fp, data_pos)) != FR_OK) return res;
if ((res = f_read(fp, block, AES_BLOCK_SIZE, &br)) != FR_OK) return res;
cbc_decrypt(block, block, 1, mode, iv); cbc_decrypt(block, block, 1, mode, iv);
memcpy(lbuff, block, data_end - data_pos); memcpy(lbuff, block, data_end - data_pos);
data_pos = data_end; data_pos = data_end;