Add cevfs_mod.c for shell activation.

Author: techrah

cevfs_build/cevfs_mod.c

@@ -0,0 +1,40 @@
+/**
+CEVFS - Compression & Encryption VFS
+cevfs_mod (shell module activation)
+
+Copyright (c) 2016 Ryan Homer, Murage Inc.
+
+MIT License
+
+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.
+*/
+
+#include "xMethods.c"
+
+struct context ctx;
+
+void sqlite3_activate_cerod(const char *key) {
+  char *pKeyBytes = sqlite3HexToBlob(NULL, key+2, strlen(key+2)-1);
+
+  ctx.pKey   = pKeyBytes;          // 32-bit encryption hex key
+  ctx.nKeySz = kCCKeySizeAES256;   // key size in bytes
+  ctx.nIvSz  = kCCBlockSizeAES128; // size of IV in bytes
+
+  cevfs_create_vfs("cevfs-cerod", NULL, &ctx, cevfsAutoDetect, 1);
+}