From 2930ba4f32680e245c1dae66197153abdf6502a6 Mon Sep 17 00:00:00 2001 From: Benedict Date: Tue, 21 Feb 2017 12:59:34 +0100 Subject: added lib to git and moved set2 to subdir --- lib/lib2.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 lib/lib2.c (limited to 'lib/lib2.c') diff --git a/lib/lib2.c b/lib/lib2.c new file mode 100644 index 0000000..86dd823 --- /dev/null +++ b/lib/lib2.c @@ -0,0 +1,23 @@ +#include "lib2.h" + +/** + * appends PKCS#7 padding to string. devide string in blocks of size blocksize + * and append to last block so that it is also of blocksize length + */ + +char *pkcs7_padding(char *string, int length_string, int blocksize) +{ + char *result = NULL; + int i; + int value = blocksize - (length_string % blocksize); + + result = malloc(length_string+value+1); + memcpy(result, string, length_string); + + for(i=0;i