Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/misc/base16/base16_decode.c

@@ -0,0 +1,65 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+#include "tomcrypt_private.h"
+
+/**
+   @file base16_decode.c
+   Base16/Hex decode a string.
+   Based on https://stackoverflow.com/a/23898449
+   Adapted for libtomcrypt by Steffen Jaeckel
+*/
+
+#ifdef LTC_BASE16
+
+/**
+   Base16 decode a string
+   @param in       The Base16 string to decode
+   @param inlen    The length of the Base16 data
+   @param out      [out] The destination of the binary decoded data
+   @param outlen   [in/out] The max size and resulting size of the decoded data
+   @return CRYPT_OK if successful
+*/
+int base16_decode(const          char *in,  unsigned long  inlen,
+                        unsigned char *out, unsigned long *outlen)
+{
+   unsigned long pos, out_len;
+   unsigned char idx0, idx1;
+   char in0, in1;
+
+   const unsigned char hashmap[] = {
+         0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 01234567 */
+         0x08, 0x09, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 89:;<=>? */
+         0xff, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0xff, /* @ABCDEFG */
+         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* HIJKLMNO */
+         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* PQRSTUVW */
+         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* XYZ[\]^_ */
+         0xff, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0xff, /* `abcdefg */
+   };
+
+   LTC_ARGCHK(in     != NULL);
+   LTC_ARGCHK(out    != NULL);
+   LTC_ARGCHK(outlen != NULL);
+
+   if ((inlen % 2) == 1) return CRYPT_INVALID_PACKET;
+   out_len = *outlen * 2;
+   for (pos = 0; ((pos + 1 < out_len) && (pos + 1 < inlen)); pos += 2) {
+      in0 = in[pos + 0];
+      in1 = in[pos + 1];
+
+      if ((in0 < '0') || (in0 > 'g')) return CRYPT_INVALID_PACKET;
+      if ((in1 < '0') || (in1 > 'g')) return CRYPT_INVALID_PACKET;
+
+      idx0 = (unsigned char) (in0 & 0x1F) ^ 0x10;
+      idx1 = (unsigned char) (in1 & 0x1F) ^ 0x10;
+
+      if (hashmap[idx0] == 0xff) return CRYPT_INVALID_PACKET;
+      if (hashmap[idx1] == 0xff) return CRYPT_INVALID_PACKET;
+
+      out[pos / 2] = (unsigned char) (hashmap[idx0] << 4) | hashmap[idx1];
+   }
+   *outlen = pos / 2;
+   return CRYPT_OK;
+}
+
+#endif

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