Refactoring md5 to generalize message digest

1 files changed, 43 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 0000000..2abadb6
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,43 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   utils.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: charles <me@cacharle.xyz>                  +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/08/01 15:00:16 by charles           #+#    #+#             */
+/*   Updated: 2020/08/01 19:24:41 by charles          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ft_ssl.h"
+
+#define HEX_CHARS "0123456789abcdef"
+
+uint32_t	rotate_left(uint32_t x, int s)
+{
+	return (x << s) | (x >> (32 - s));
+}
+
+uint32_t	rotate_right(uint32_t x, int s)
+{
+	return (x >> s) | (x << (32 - s));
+}
+
+char		*bytes_to_str(uint8_t *bytes, size_t size)
+{
+	char	*ret;
+	size_t	i;
+
+	if ((ret = ft_strnew(size * 2)) == NULL)
+		return (NULL);
+
+	i = 0;
+	while (i < size)
+	{
+		ret[i * 2 + 0] = HEX_CHARS[(bytes[i] & 0xf0) >> 4];
+		ret[i * 2 + 1] = HEX_CHARS[(bytes[i] & 0x0f) >> 0];
+		i++;
+	}
+	return (ret);
+}