yuzu-emu/mbedtls
1
0
Fork 0
mirror of https://github.com/yuzu-emu/mbedtls.git synced 2024-11-27 12:14:18 +01:00
Code Issues Packages Projects Releases Wiki Activity

Add comment to integer overflow fix in base64.c

Browse Source 
Adds clarifying comment to the integer overflow fix in base64.c
This commit is contained in:
Simon Butcher 2017-02-02 08:46:53 +00:00
parent 1ea2b05af4
commit df06c200b8
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
library/base64.c
View File

@ -192,6 +192,10 @@ int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
return( 0 ); return( 0 );
} }
/* The following expression is to calculate the following formula without
* risk of integer overflow in n:
* n = ( ( n * 6 ) + 7 ) >> 3;
*/
n = ( 6 * ( n >> 3 ) ) + ( ( 6 * ( n & 0x7 ) + 7 ) >> 3 ); n = ( 6 * ( n >> 3 ) ) + ( ( 6 * ( n & 0x7 ) + 7 ) >> 3 );
n -= j; n -= j;