diff options
Diffstat (limited to 'libkeccak_behex_upper.c')
| -rw-r--r-- | libkeccak_behex_upper.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/libkeccak_behex_upper.c b/libkeccak_behex_upper.c new file mode 100644 index 0000000..73a67a1 --- /dev/null +++ b/libkeccak_behex_upper.c @@ -0,0 +1,21 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +/** + * Convert a binary hashsum to upper case hexadecimal representation + * + * @param output Output array, should have an allocation size of at least `2 * n + 1` + * @param hashsum The hashsum to convert + * @param n The size of `hashsum` + */ +void +libkeccak_behex_upper(char *restrict output, const void *restrict hashsum_, size_t n) +{ + const unsigned char *restrict hashsum = hashsum_; + output[2 * n] = '\0'; + while (n--) { + output[2 * n + 0] = "0123456789ABCDEF"[(hashsum[n] >> 4) & 15]; + output[2 * n + 1] = "0123456789ABCDEF"[(hashsum[n] >> 0) & 15]; + } +} |