From 5cd20516567da82c60b5513c732e23db6918a4b6 Mon Sep 17 00:00:00 2001 From: ame Date: Fri, 3 Nov 2023 19:45:15 -0500 Subject: tons of checksums (i had fun:3) --- src/hash/bsdchecksum.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 src/hash/bsdchecksum.c (limited to 'src/hash/bsdchecksum.c') diff --git a/src/hash/bsdchecksum.c b/src/hash/bsdchecksum.c new file mode 100644 index 0000000..1c69497 --- /dev/null +++ b/src/hash/bsdchecksum.c @@ -0,0 +1,30 @@ +#include "../crypto.h" +#include +#include + + +uint16_t i_bsdchecksum(uint8_t *aa, size_t len){ + uint16_t check = 0x0; + + for(int i = 0; i != len; i++){ + uint8_t a = aa[i]; + check = (check >> 1) + ((check & 1) << 15); + check += a; + check &= 0xffff; + } + return check; +} + +int l_bsdchecksum(lua_State* L){ + + size_t len = 0; + uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len); + + char digest[16]; + + uint16_t u = i_bsdchecksum(a, len); + sprintf(digest,"%x",u); + lua_pushstring(L, digest); + + return 1; +} -- cgit v1.2.3