问在iOS应用程序中存储包含的亚马逊网络服务凭据的最佳位置

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#include <stdio.h>

#define PAD_LENGTH 32

int main() {
  int i;
  char c;

  // start with the password
  char password[PAD_LENGTH] = "My AWS Password\0";

  // make a random pad to encrypt it
  printf("PAD:\n{");
  char pad[PAD_LENGTH];
  for (i = 0; i < PAD_LENGTH; i++) {
    c = arc4random() & 0xFF;
    pad[i] = c;
    printf("%#02x", c & 0xFF);
    if (i < PAD_LENGTH - 1) printf(",");
  }
  printf("}\n");

  // make an encrypted version of the password
  printf("KEY:\n{");
  for (i = 0; i < PAD_LENGTH; i++) {
    c = pad[i] ^ password[i];
    printf("%#02x", c & 0xFF);
    if (i < PAD_LENGTH - 1) printf(",");
  }
  printf("}\n");

  return(0);
}

#define PAD_LENGTH 32

char pad[PAD_LENGTH] = {0x83,0x26,0x8a,0x8b,0xee,0xab,0x6,0xed,0x2e,0x99,0xff,0x23,0x7f,0xef,0xc8,0x8,0x6b,0x8e,0xa4,0x64,0x6d,0xb,0x7,0xd2,0x6a,0x39,0x60,0xa4,0xa9,0xad,0xea,0xb8};
char key[PAD_LENGTH] = {0xce,0x5f,0xaa,0xca,0xb9,0xf8,0x26,0xbd,0x4f,0xea,0x8c,0x54,0x10,0x9d,0xac,0x8,0x6b,0x8e,0xa4,0x64,0x6d,0xb,0x7,0xd2,0x6a,0x39,0x60,0xa4,0xa9,0xad,0xea,0xb8};
for (int i = 0; i < PAD_LENGTH; i++) {
  key[i] = key[i] ^ pad[i];
}
NSString *password = [NSString stringWithCString:key encoding:NSASCIIStringEncoding];