1 files changed, 125 insertions, 0 deletions
diff --git a/src/base64.c b/src/base64.c
new file mode 100644
index 000000000..f17550bba
--- /dev/null
+++ b/src/base64.c
@@ -0,0 +1,125 @@
+/* base64 routines.
+ *
+ * (C) 2003 Anope Team
+ * Contact us at info@anope.org
+ *
+ * Please read COPYING and README for furhter details.
+ *
+ * Based on the original code of Epona by Lara.
+ * Based on the original code of Services by Andy Church. 
+ * 
+ *
+ */
+
+/*
+   This is borrowed from Unreal
+*/
+
+#include "services.h"
+
+static char *int_to_base64(long);
+static long base64_to_int(char *);
+
+char *base64enc(long i)
+{
+    if (i < 0)
+        return ("0");
+    return int_to_base64(i);
+}
+
+long base64dec(char *b64)
+{
+    if (b64)
+        return base64_to_int(b64);
+    else
+        return 0;
+}
+
+/* ':' and '#' and '&' and '+' and '@' must never be in this table. */
+/* these tables must NEVER CHANGE! >) */
+char int6_to_base64_map[] = {
+    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
+    'E', 'F',
+    'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
+    'U', 'V',
+    'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
+    'k', 'l',
+    'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+    '{', '}'
+};
+
+char base64_to_int6_map[] = {
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
+    -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
+    25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1,
+    -1, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
+    51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, -1, 63, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
+};
+
+static char *int_to_base64(long val)
+{
+    /* 32/6 == max 6 bytes for representation, 
+     * +1 for the null, +1 for byte boundaries 
+     */
+    static char base64buf[8];
+    long i = 7;
+
+    base64buf[i] = '\0';
+
+    /* Temporary debugging code.. remove before 2038 ;p.
+     * This might happen in case of 64bit longs (opteron/ia64),
+     * if the value is then too large it can easily lead to
+     * a buffer underflow and thus to a crash. -- Syzop
+     */
+    if (val > 2147483647L) {
+        abort();
+    }
+
+    do {
+        base64buf[--i] = int6_to_base64_map[val & 63];
+    }
+    while (val >>= 6);
+
+    return base64buf + i;
+}
+
+static long base64_to_int(char *b64)
+{
+    int v = base64_to_int6_map[(u_char) * b64++];
+
+    if (!b64)
+        return 0;
+
+    while (*b64) {
+        v <<= 6;
+        v += base64_to_int6_map[(u_char) * b64++];
+    }
+
+    return v;
+}
+
+long base64dects(char *ts)
+{
+    char *token;
+
+    if (!ts) {
+        return 0;
+    }
+    token = myStrGetToken(ts, '!', 1);
+
+    if (!token) {
+        return strtoul(ts, NULL, 10);;
+    }
+    return base64dec(token);
+}