build system 3

[henge/webcc.git] / src / henge / core / auth.c

diff --git a/src/henge/core/auth.c b/src/henge/core/auth.c
new file mode 100644 (file)
index 0000000..ce158b8
--- /dev/null
+++ b/src/henge/core/auth.c
@@ -0,0 +1,113 @@
+/*!@file
+  \brief  Password Encyption and Storing
+  \details hashes password using SHA256 and saves result in a file on VFS using
+           hashing algorithm provided by wolfcrypt(wc), a subsystem of wolfSSL
+  \author  JEL
+  \date    2016
+  -----------------------------------------------------------------------------*/
+#include <stddef.h>
+#include <stdio.h>
+#include <wolfssl/wolfcrypt/sha256.h>
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+#endif
+
+word32 str_len(const char*);
+int auth_encrypt(int argc, char** argv);
+void store_password(byte*);
+
+/* Should come with wolfcrypt type.h */
+/* typedef unsigned int word32; */
+
+word32
+str_len (const char* str)
+{
+  const char* strl;
+
+  for (strl = str; *strl != '\0'; ++strl)
+  {
+  /* nothing to be done */;
+  }
+  return strl - str;
+}
+
+
+/* Takes a string and hashes it, returning
+   the encrypted string as a result */
+
+int
+auth_encrypt(int argc, char** argv)
+{
+  /* Determine length of password */
+  word32 len = 0;
+  char* password;
+  byte hash[32]; /* 32bytes * 8 = 256, the # bits of hash */
+  const unsigned char c_password[32]; /* Passwords are between 8-32 chars */
+  Sha256 sha256[1]; /* Init a Sha256 type for wc */
+
+
+  password = argv[0];
+  len = str_len(password);
+
+  /* Converting password to unsigned const char* for wc_functions */
+  memcpy( (void*) c_password, (void*) password, len+1);
+
+  if (wc_InitSha256(sha256) != 0 )
+   {
+     printf("wc_InitSha256 failed\n");
+   }
+   else
+   {
+     wc_Sha256Update(sha256, c_password, len);
+     wc_Sha256Final(sha256, hash);
+   }
+
+  printf("password is: %s\n", c_password);
+  printf("password length is: %d\n", len);
+  for(len = 0; len < 32; len++){
+    printf("hash is %x\n",hash[len]);
+  }
+
+  store_password(hash);
+  //free((void*) c_password);
+
+
+  return 0;
+}
+
+void
+store_password(byte* hash)
+{
+  byte b;
+  /* Save hash to a file on emscripten VFS */
+  FILE *fp;
+  int i;
+  byte buff[32] = {0};
+
+  printf("=====Storing Password in auth/password========\n");
+  /* for(i = 0; i < 32; i++){ */
+  /*   printf("hash is %x\n",hash[i]); */
+  /* } */
+
+  fp = fopen("/auth/password", "w+");
+  if(!fp)
+  {
+    printf("cannot open file\n");
+  }
+  else
+  {
+    fwrite(hash, 1, 32, fp);
+  }
+
+  printf("========Stored Password=========\n");
+
+  fseek(fp, 0, SEEK_SET);
+
+  for(i = 0; i < 32; i++)
+  {
+    fread(buff, 1, 32, fp) ;
+    printf("buff is %x\n",buff[i]);
+  }
+
+  fclose(fp);
+}