user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %rsi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  cmp    $0x3,%edi
  jne    L9
  mov    $0x1,%r15d
  xor    %ebp,%ebp
  xor    %r12d,%r12d
  lea    D8(%rip),%rcx
  lea    D28(%rip),%r14
L43:
  mov    0x0(%r13,%r15,8),%rbx
  mov    %rcx,%rsi
  mov    $0x6,%edx
  mov    %rbx,%rdi
  call   <strncmp@plt>
  mov    %rbx,%rdi
  mov    $0x9,%edx
  mov    %r14,%rsi
  mov    %eax,%r8d
  lea    0x6(%rbx),%rax
  test   %r8d,%r8d
  cmove  %rax,%r12
  add    $0x9,%rbx
  call   <strncmp@plt>
  lea    D8(%rip),%rcx
  test   %eax,%eax
  cmove  %rbx,%rbp
  cmp    $0x2,%r15
  jne    L33
  test   %r12,%r12
  je     L9
  test   %rbp,%rbp
  je     L9
  lea    D15(%rip),%rdi
  call   <puts@plt>
  mov    %rbp,%rdx
  mov    %r12,%rsi
  xor    %eax,%eax
  lea    D31(%rip),%rdi
  call   <printf@plt>
  mov    %rbp,%rdi
  call   <strlen@plt>
  lea    0x8(%rsp),%rcx
  mov    %rbp,%rsi
  mov    %r12,%rdi
  mov    %rax,%rdx
  lea    0x10(%rsp),%r8
  call   <PBEWithMD5AndDES_decrypt@plt>
  test   %rax,%rax
  je     L21
  lea    D35(%rip),%rdi
  call   <puts@plt>
  mov    0x8(%rsp),%rsi
  lea    D56(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rsp),%rdi
  call   <free@plt>
  xor    %eax,%eax
L12:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L78
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L9:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L78
  mov    0x0(%r13),%rdi
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1130 <usage@plt>
  nopl   (%rax)
L33:
  mov    $0x2,%r15d
  jmp    L43
L21:
  lea    D37(%rip),%rdi
  call   <puts@plt>
  or     $0xffffffff,%eax
  jmp    L12
L78:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_tag: D8
datatype: string
name: unpack_data
arguments: data_tag: D28
datatype: string
name: unpack_data
arguments: data_tag: D15
datatype: string
name: unpack_data
arguments: data_tag: D31
datatype: string
name: unpack_data
arguments: data_tag: D35
datatype: string
name: unpack_data
arguments: data_tag: D56
datatype: string
name: unpack_data
arguments: data_tag: D37
datatype: string

tool: D8: input=

tool: D28: password=

tool: D15: 
----ARGUMENTS-------------------


tool: D31: input: %s
password: %s




tool: D35: 
----OUTPUT----------------------


tool: D56: %s




tool: D37: PBEWithMD5AndDES_decrypt() returns error.

assistant: ```c
int main(int argc, char *argv[]) {
  char *input = NULL;
  char *password = NULL;
  unsigned char *decrypt;
  size_t i, len;
  if (argc != 3) {
    return usage(argv[0]);
  }
  for (i = 1; i < 3; i++) {
    if (!strncmp(argv[i], "input=", strlen("input="))) {
      input = &(argv[i][strlen("input=")]);
    }
    if (!strncmp(argv[i], "password=", strlen("password="))) {
      password = &(argv[i][strlen("password=")]);
    }
  }
  if ((input == NULL) || (password == NULL)) {
    return usage(argv[0]);
  }
  printf("\n----ARGUMENTS-------------------\n\n");
  printf("input: %s\npassword: %s\n\n\n", input, password);
  if (PBEWithMD5AndDES_decrypt(input, (unsigned char *)password, strlen(password), &decrypt, &len) != NULL) {
    printf("\n----OUTPUT----------------------\n\n");
    printf("%s\n\n\n", decrypt);
  } else {
    printf("PBEWithMD5AndDES_decrypt() returns error.\n");
    return -1;
  }
  free(decrypt);
  return 0;
}
```