1 files changed, 59 insertions, 0 deletions

diff --git a/src/lib/base64.c b/src/lib/base64.c
new file mode 100644
index 00000000..3dc7a142
--- /dev/null
+++ b/src/lib/base64.c
@@ -0,0 +1,59 @@
+/*
+ * This code implements the BASE64 algorithm.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * @file base64.c
+ * @brief This code implements the BASE64 algorithm
+ * @author Matthieu Speder
+ */
+#include "base64.h"
+
+static const char base64_digits[] =
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 62, 0, 0, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
+    0, 0, 0, -1, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
+    14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0, 0, 26,
+    27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44,
+    45, 46, 47, 48, 49, 50, 51, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+
+
+char *
+BASE64Decode(const char* src)
+{
+  size_t in_len = strlen (src);
+  char* dest;
+  char* result;
+
+  if (in_len % 4)
+    {
+      /* Wrong base64 string length */
+      return NULL;
+    }
+  result = dest = malloc(in_len / 4 * 3 + 1);
+  if (NULL == result)
+    return NULL; /* out of memory */
+  while (*src) {
+    char a = base64_digits[(unsigned char)*(src++)];
+    char b = base64_digits[(unsigned char)*(src++)];
+    char c = base64_digits[(unsigned char)*(src++)];
+    char d = base64_digits[(unsigned char)*(src++)];
+    *(dest++) = (a << 2) | ((b & 0x30) >> 4);
+    if (c == (char)-1)
+      break;
+    *(dest++) = ((b & 0x0f) << 4) | ((c & 0x3c) >> 2);
+    if (d == (char)-1)
+      break;
+    *(dest++) = ((c & 0x03) << 6) | d;
+  }
+  *dest = 0;
+  return result;
+}
+
+
+/* end of base64.c */