jsiConsolePrint(); usage example?

Ahh, ok, so you do call AES128_CBC_encrypt_buffer(buffer, in, 128, key, iv); on the data?

Maybe just simplify to this:

static void test_encrypt_cbc(void)
{
  uint8_t in[128]  = { 0x7B, 0x22, 0x50, 0x48, 0x22, 0x3A, 0x5B, 0x22, 0x52, 0x65, 0x73, 0x75, 0x6C, 0x74, 0x22, 0x2C,
                       0x35, 0x2E, 0x35, 0x5D, 0x2C, 0x22, 0x45, 0x43, 0x22, 0x3A, 0x5B, 0x22, 0x52, 0x65, 0x73, 0x75,
                       0x6C, 0x74, 0x22, 0x2C, 0x37, 0x30, 0x30, 0x5D, 0x2C, 0x22, 0x52, 0x65, 0x73, 0x54, 0x65, 0x6D,
                       0x70, 0x22, 0x3A, 0x5B, 0x22, 0x52, 0x65, 0x73, 0x75, 0x6C, 0x74, 0x22, 0x2C, 0x31, 0x33, 0x37,
                       0x2E, 0x35, 0x5D, 0x7D, 0x30 };
  int i;
  
  jsiConsolePrint(in);
  jsiConsolePrint("\n int: ");
  for(i = 0; i < 128; ++i)
    jsiConsolePrintf("%d,", (int)in[i]);
  jsiConsolePrintf("\n");
  jsiConsolePrint("\n int as hex: ");
  for(i = 0; i < 128; ++i)
    jsiConsolePrintf("%x,", (int)in[i]);
  jsiConsolePrintf("\n");

  jsiConsolePrint("\n int as char: ");
  for(i = 0; i < 128; ++i)
    jsiConsolePrintf("%c,", (int)in[i]);
  jsiConsolePrintf("\n");
  int n = sizeof(in);
  jsiConsolePrint(n);
}

and make sure the correct data is output? My guess is AES128_CBC_encrypt_buffer might be fiddling with the data inside in