dany/pdfio
1
0
Fork 0
mirror of https://github.com/michaelrsweet/pdfio.git synced 2025-08-29 07:12:02 +02:00
Code Issues Packages Projects Releases Wiki Activity

Refactor crypto callback to have separate input/output pointers. Add initial writing support.

Browse Source
This commit is contained in:
Michael R Sweet
2021-10-12 09:13:30 -04:00
parent 0caea44f32
commit c24243a2bc
7 changed files with 151 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
pdfio-rc4.c
View File

@@ -66,11 +66,14 @@ _pdfioCryptoRC4Init(
//
// '_pdfioCryptoRC4Crypt()' - De/encrypt the given buffer.
//
// "inbuffer" and "outbuffer" can point to the same memory.
//
void
_pdfioCryptoRC4Crypt(
_pdfio_rc4_t *ctx, // I - Context
uint8_t *buffer, // I - Buffer
uint8_t *outbuffer, // I - Output buffer
const uint8_t *inbuffer, // I - Input buffer
size_t len) // I - Size of buffers
{
uint8_t tmp, // Swap variable
@@ -97,7 +100,7 @@ _pdfioCryptoRC4Crypt(
t = ctx->sbox[i] + ctx->sbox[j];
// Encrypt using the S box...
*buffer++ ^= ctx->sbox[t];
*outbuffer++ = *inbuffer++ ^ ctx->sbox[t];
len --;
}