user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x80,-0x20(%rbp)
  movl   $0x81,-0x1c(%rbp)
  movl   $0x82,-0x18(%rbp)
  movl   $0x83,-0x14(%rbp)
  lea    D5(%rip),%rax
  mov    %rax,%rsi
  lea    D42(%rip),%rax
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x40(%rbp)
  lea    D38(%rip),%rax
  mov    %rax,%rsi
  lea    D25(%rip),%rax
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x38(%rbp)
  cmpq   $0x0,-0x40(%rbp)
  je     L11
  cmpq   $0x0,-0x38(%rbp)
  jne    L37
L11:
  lea    D11(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
L37:
  mov    -0x40(%rbp),%rdx
  lea    -0x28(%rbp),%rax
  mov    %rdx,%rcx
  mov    $0x4,%edx
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <fread@plt>
  lea    -0x28(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x50(%rbp)
  mov    -0x50(%rbp),%eax
  lea    0x7(%rax),%edx
  test   %eax,%eax
  cmovs  %edx,%eax
  sar    $0x3,%eax
  mov    %eax,-0x4c(%rbp)
  mov    -0x4c(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x48(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x30(%rbp)
  movl   $0x0,-0x54(%rbp)
  jmp    L59
L47:
  mov    -0x40(%rbp),%rdx
  lea    -0x28(%rbp),%rax
  mov    %rdx,%rcx
  mov    $0x8,%edx
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <fread@plt>
  lea    -0x20(%rbp),%rdx
  lea    -0x28(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <decrypt@plt>
  lea    -0x28(%rbp),%rcx
  mov    -0x48(%rbp),%rax
  mov    $0x8,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  addq   $0x8,-0x48(%rbp)
  addl   $0x1,-0x54(%rbp)
L59:
  mov    -0x54(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L47
  mov    -0x38(%rbp),%rcx
  mov    -0x4c(%rbp),%edx
  mov    -0x30(%rbp),%rax
  mov    $0x8,%esi
  mov    %rax,%rdi
  call   <fwrite@plt>
  mov    -0x50(%rbp),%eax
  and    $0x7,%eax
  test   %eax,%eax
  je     L13
  lea    -0x28(%rbp),%rcx
  mov    -0x48(%rbp),%rax
  mov    $0x8,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  lea    -0x20(%rbp),%rdx
  lea    -0x28(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <decrypt@plt>
  mov    -0x50(%rbp),%eax
  cltd
  shr    $0x1d,%edx
  add    %edx,%eax
  and    $0x7,%eax
  sub    %edx,%eax
  mov    %eax,%esi
  mov    -0x38(%rbp),%rdx
  mov    -0x30(%rbp),%rax
  mov    %rdx,%rcx
  mov    %esi,%edx
  mov    $0x8,%esi
  mov    %rax,%rdi
  call   <fwrite@plt>
L13:
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L39
  call   <__stack_chk_fail@plt>
L39:
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: data_tag: D5
data_type: string
name: retrieve_data
arguments: data_tag: D42
data_type: string
name: retrieve_data
arguments: data_tag: D38
data_type: string
name: retrieve_data
arguments: data_tag: D25
data_type: string
name: retrieve_data
arguments: data_tag: D11
data_type: string

tool: D5: rb

tool: D42: imgno8.enc

tool: D38: wb

tool: D25: imagen2.png

tool: D11: Error: No se pudo abrir el fichero


assistant: ```c
int main() {
  unsigned int v[2], k[4] = {128, 129, 130, 131};
  int n_bloques, tam;
  FILE *f_encriptado, *f_desencriptado;
  unsigned int *ptr2, *ptr2_ref;
  f_encriptado = fopen("imgno8.enc", "rb");
  f_desencriptado = fopen("imagen2.png", "wb");
  if (f_encriptado == NULL || f_desencriptado == NULL) {
    printf("Error: No se pudo abrir el fichero\n");
  }
  fread(v, 1, sizeof(int), f_encriptado);
  tam = *((int *)v);
  n_bloques = tam / 8;
  ptr2 = malloc(sizeof(v) * n_bloques);
  ptr2_ref = ptr2;
  for (int i = 0; i < n_bloques; i++) {
    fread(v, 1, 8, f_encriptado);
    decrypt(v, k);
    memcpy(ptr2, v, 8);
    ptr2 += 2;
  }
  fwrite(ptr2_ref, 8, n_bloques, f_desencriptado);
  if (tam % 8 != 0) {
    memcpy(ptr2, v, 8);
    decrypt(v, k);
    fwrite(ptr2_ref, 8, tam % 8, f_desencriptado);
  }
  fclose(f_encriptado);
  fclose(f_desencriptado);
  free(ptr2_ref);
  return 0;
}
```