Add a quick and simple implementation of base64 encryption and Whirpool hashing algorithm.

include/b64.h

@@ -0,0 +1,76 @@
+
+/**
+ * `b64.h' - b64
+ *
+ * copyright (c) 2014 joseph werle
+ */
+
+#ifndef B64_H
+#define B64_H 1
+
+/**
+ *  Memory allocation functions to use. You can define b64_malloc and
+ * b64_realloc to custom functions if you want.
+ */
+
+#ifndef b64_malloc
+#  define b64_malloc(ptr) malloc(ptr)
+#endif
+#ifndef b64_realloc
+#  define b64_realloc(ptr, size) realloc(ptr, size)
+#endif
+
+/**
+ * Base64 index table.
+ */
+
+static const char b64_table[] = {
+  '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', '0', '1', '2', '3',
+  '4', '5', '6', '7', '8', '9', '+', '/'
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Encode `unsigned char *' source with `size_t' size.
+ * Returns a `char *' base64 encoded string.
+ */
+
+char *
+b64_encode (const unsigned char *, size_t);
+
+/**
+ * Encode `unsigned char *' source with `size_t' size.
+ * Returns a `char *' base64 encoded string + size of encoded string.
+ */
+
+char *
+b64_encode_ex (const unsigned char *, size_t, size_t *);
+
+/**
+ * Dencode `char *' source with `size_t' size.
+ * Returns a `unsigned char *' base64 decoded string.
+ */
+unsigned char *
+b64_decode (const char *, size_t);
+
+/**
+ * Dencode `char *' source with `size_t' size.
+ * Returns a `unsigned char *' base64 decoded string + size of decoded string.
+ */
+unsigned char *
+b64_decode_ex (const char *, size_t, size_t *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

include/whirlpool.h

@@ -0,0 +1,34 @@
+/* whirlpool.h */
+#ifndef WHIRLPOOL_H
+#define WHIRLPOOL_H
+#include "ustd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define whirlpool_block_size 64
+
+/* algorithm context */
+typedef struct whirlpool_ctx
+{
+	uint64_t hash[8];    /* 512-bit algorithm internal hashing state */
+	unsigned char message[whirlpool_block_size]; /* 512-bit buffer to hash */
+
+	/* Note: original algorith uses 256-bit counter, allowing to hash up to
+	   2^256 bits sized message. For optimization we use here 64-bit counter,
+	   thus reducing maximal message size to 2^64 bits = 2 Exbibytes = 2^21 TiB) */
+	uint64_t length;     /* number of processed bytes */
+} whirlpool_ctx;
+
+/* hash functions */
+
+void rhash_whirlpool_init(whirlpool_ctx* ctx);
+void rhash_whirlpool_update(whirlpool_ctx* ctx, const unsigned char* msg, size_t size);
+void rhash_whirlpool_final(whirlpool_ctx* ctx, unsigned char* result);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif /* __cplusplus */
+
+#endif /* WHIRLPOOL_H */