1 files changed, 47 insertions, 0 deletions
diff --git a/src/lib/base32.h b/src/lib/base32.h
new file mode 100644
index 0000000..6a7b52a
--- /dev/null
+++ b/src/lib/base32.h
@@ -0,0 +1,47 @@
+#ifndef BASE32_H
+#define BASE32_H
+
+/* Translates binary data into base32 (RFC 4648, Section 6). The src must not
+   point to dest buffer. The pad argument determines whether output is padded
+   with '='.
+ */
+void base32_encode(bool pad, const void *src, size_t src_size,
+	buffer_t *dest);
+
+/* Translates binary data into base32hex (RFC 4648, Section 7). The src must
+   not point to dest buffer. The pad argument determines whether output is
+   padded with '='.
+ */
+void base32hex_encode(bool pad, const void *src, size_t src_size,
+	buffer_t *dest);
+
+/* Translates base32/base32hex data into binary and appends it to dest buffer.
+   dest may point to same buffer as src. Returns 1 if all ok, 0 if end of
+   base32 data found, -1 if data is invalid.
+
+   Any whitespace characters are ignored.
+
+   This function may be called multiple times for parsing the same stream.
+   If src_pos is non-NULL, it's updated to first non-translated character in
+   src. */
+int base32_decode(const void *src, size_t src_size,
+		  size_t *src_pos_r, buffer_t *dest) ATTR_NULL(4);
+int base32hex_decode(const void *src, size_t src_size,
+		  size_t *src_pos_r, buffer_t *dest) ATTR_NULL(4);
+
+/* Decode given string to a buffer allocated from data stack. */
+buffer_t *t_base32_decode_str(const char *str);
+buffer_t *t_base32hex_decode_str(const char *str);
+
+/* Returns TRUE if c is a valid base32 encoding character (excluding '=') */
+bool base32_is_valid_char(char c);
+bool base32hex_is_valid_char(char c);
+
+/* max. buffer size required for base32_encode()/base32hex_encode() */
+#define MAX_BASE32_ENCODED_SIZE(size) \
+	((size) / 5 * 8 + 8)
+/* max. buffer size required for base32_decode()/base32hex_decode() */
+#define MAX_BASE32_DECODED_SIZE(size) \
+	((size) / 8 * 5 + 5)
+
+#endif