Add various bip39 and base32/base58 stuff

src/crypto/bip39/base32.h

@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) 2017 Saleem Rashid
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __BASE32_H__
+#define __BASE32_H__
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+extern const char *BASE32_ALPHABET_RFC4648;
+
+char *base32_encode(const uint8_t *in, size_t inlen, char *out, size_t outlen, const char *alphabet);
+void base32_encode_unsafe(const uint8_t *in, size_t inlen, uint8_t *out);
+
+uint8_t *base32_decode(const char *in, size_t inlen, uint8_t *out, size_t outlen, const char *alphabet);
+bool base32_decode_unsafe(const uint8_t *in, size_t inlen, uint8_t *out, const char *alphabet);
+
+size_t base32_encoded_length(size_t inlen);
+size_t base32_decoded_length(size_t inlen);
+
+#endif