Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/misc/base16/base16_encode.c

@@ -0,0 +1,64 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+#include "tomcrypt_private.h"
+
+/**
+   @file base16_encode.c
+   Base16/Hex encode a string, Steffen Jaeckel
+*/
+
+#ifdef LTC_BASE16
+
+/**
+   Base16 encode a buffer
+   @param in       The input buffer to encode
+   @param inlen    The length of the input buffer
+   @param out      [out] The destination of the Base16 encoded data
+   @param outlen   [in/out] The max size and resulting size of the encoded data
+   @param options  Output 'a-f' on 0 and 'A-F' otherwise.
+   @return CRYPT_OK if successful
+*/
+int base16_encode(const unsigned char *in,  unsigned long  inlen,
+                                 char *out, unsigned long *outlen,
+                        unsigned int   options)
+{
+   unsigned long i, x;
+   const char *alphabet;
+   const char *alphabets[2] = {
+      "0123456789abcdef",
+      "0123456789ABCDEF",
+   };
+
+   LTC_ARGCHK(in     != NULL);
+   LTC_ARGCHK(out    != NULL);
+   LTC_ARGCHK(outlen != NULL);
+
+   /* check the sizes */
+   x = inlen * 2 + 1;
+
+   if (x < inlen) return CRYPT_OVERFLOW;
+
+   if (*outlen < x) {
+      *outlen = x;
+      return CRYPT_BUFFER_OVERFLOW;
+   }
+   x--;
+   *outlen = x; /* returning the length without terminating NUL */
+
+   if (options == 0) {
+      alphabet = alphabets[0];
+   } else {
+      alphabet = alphabets[1];
+   }
+
+   for (i = 0; i < x; i += 2) {
+      out[i]   = alphabet[(in[i/2] >> 4) & 0x0f];
+      out[i+1] = alphabet[in[i/2] & 0x0f];
+   }
+   out[x] = '\0';
+
+   return CRYPT_OK;
+}
+
+#endif