user: Converte this assembly snippet into its equivalent C code:

```asm
<Decrypt>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x34(%rbp)
  movq   $0x0,-0x30(%rbp)
  movq   $0x0,-0x28(%rbp)
  movl   $0x0,-0x38(%rbp)
  jmp    L48
L105:
  mov    -0x38(%rbp),%eax
  cltq
  add    $0x14,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,%edi
  call   <READ_ROUND_KEY_BYTE@plt>
  mov    %eax,%edx
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%ecx
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rsi
  mov    -0x48(%rbp),%rax
  add    %rsi,%rax
  xor    %ecx,%edx
  mov    %edx,(%rax)
  addl   $0x1,-0x38(%rbp)
L48:
  cmpl   $0x3,-0x38(%rbp)
  jle    L105
  movl   $0x1,-0x38(%rbp)
  jmp    L40
L32:
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x50(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x38(%rbp),%edx
  mov    -0x48(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <rrr_enc_dec_round@plt>
  addl   $0xc,-0x34(%rbp)
  addl   $0x1,-0x38(%rbp)
L40:
  cmpl   $0xc,-0x38(%rbp)
  jle    L32
  movl   $0x0,-0x38(%rbp)
  jmp    L1
L73:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x38(%rbp),%eax
  cltq
  mov    %edx,-0x30(%rbp,%rax,4)
  addl   $0x1,-0x38(%rbp)
L1:
  cmpl   $0x3,-0x38(%rbp)
  jle    L73
  movl   $0x0,-0x38(%rbp)
  jmp    L96
L41:
  mov    -0x38(%rbp),%eax
  cltq
  add    $0x4,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%ebx
  mov    -0x38(%rbp),%eax
  cltq
  add    $0x8,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,%edi
  call   <READ_ROUND_KEY_BYTE@plt>
  mov    %eax,%edx
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  xor    %ebx,%edx
  mov    %edx,(%rax)
  addl   $0x1,-0x38(%rbp)
L96:
  cmpl   $0x3,-0x38(%rbp)
  jle    L41
  movl   $0x0,-0x38(%rbp)
  jmp    L80
L85:
  mov    -0x38(%rbp),%eax
  cltq
  add    $0x4,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rax,%rdx
  mov    -0x38(%rbp),%eax
  cltq
  mov    -0x30(%rbp,%rax,4),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x38(%rbp)
L80:
  cmpl   $0x3,-0x38(%rbp)
  jle    L85
  nop
  mov    -0x18(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L78
  call   <__stack_chk_fail@plt>
L78:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
void Decrypt(uint8_t *block, uint8_t *roundKeys) {
  uint8_t i, j = 0, temp[4] = {0};
  for (i = 0; i < 4; i++)
    block[i] ^= READ_ROUND_KEY_BYTE(roundKeys[i + 20]);
  for (i = 1; i <= 12; i++) {
    rrr_enc_dec_round(block, roundKeys + j, i);
    j += 12;
  }
  for (i = 0; i < 4; i++)
    temp[i] = block[i];
  for (i = 0; i < 4; i++)
    block[i] = block[i + 4] ^ READ_ROUND_KEY_BYTE(roundKeys[i + 8]);
  for (i = 0; i < 4; i++)
    block[i + 4] = temp[i];
}
```