user: 请将以下的汇编代码转换成C语言代码：

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  cmp    $0x2,%edi
  jle    L48
  mov    %edi,%ebx
  mov    %rsi,%r12
  mov    0x8(%rsi),%rdi
  lea    D59(%rip),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L251
  cmp    $0x4,%ebx
  jne    L193
  mov    0x10(%r12),%rdi
  lea    D76(%rip),%rsi
  call   <fopen@plt>
  mov    %rax,%r14
  test   %rax,%rax
  je     L207
  mov    $0x2,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <fseek@plt>
  mov    %r14,%rdi
  call   <ftell@plt>
  mov    %eax,%r13d
  mov    $0x0,%edx
  mov    $0x0,%esi
  mov    %r14,%rdi
  call   <fseek@plt>
  mov    %r13d,%edi
  call   <malloc@plt>
  mov    %rax,%rbx
  mov    %r13d,%edi
  call   <malloc@plt>
  mov    %rax,%rbp
  mov    %r14,%rcx
  mov    %r13d,%edx
  mov    $0x1,%esi
  mov    %rbx,%rdi
  call   <fread@plt>
  mov    %r14,%rdi
  call   <fclose@plt>
  test   %r13d,%r13d
  je     L36
  mov    %r13d,%ecx
  mov    $0x0,%eax
L167:
  movzbl (%rbx,%rax,1),%edx
  mov    %dl,0x0(%rbp,%rax,1)
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L167
L36:
  mov    %r13d,%edx
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <encrypt@plt>
  mov    0x18(%r12),%rdi
  lea    D92(%rip),%rsi
  call   <fopen@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L34
  movl   $0x1020304,0x4(%rsp)
  lea    0x4(%rsp),%rdi
  mov    %rax,%rcx
  mov    $0x4,%edx
  mov    $0x1,%esi
  call   <fwrite@plt>
  mov    %rbx,%rcx
  mov    %r13d,%edx
  mov    $0x1,%esi
  mov    %rbp,%rdi
  call   <fwrite@plt>
  mov    %rbx,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
L213:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L264
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L48:
  lea    D82(%rip),%rdi
  call   <puts@plt>
  mov    $0xffffffff,%eax
  jmp    L213
L193:
  lea    D20(%rip),%rdi
  call   <puts@plt>
L246:
  mov    $0xffffffff,%eax
  jmp    L213
L207:
  mov    0x10(%r12),%rsi
  lea    D7(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  jmp    L246
L34:
  mov    0x10(%r12),%rsi
  lea    D99(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  jmp    L246
L251:
  mov    0x8(%r12),%rdi
  lea    D11(%rip),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L98
  cmp    $0x4,%ebx
  jne    L108
  mov    0x10(%r12),%rdi
  lea    D76(%rip),%rsi
  call   <fopen@plt>
  mov    %rax,%r14
  test   %rax,%rax
  je     L223
  mov    $0x2,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <fseek@plt>
  mov    %r14,%rdi
  call   <ftell@plt>
  mov    %eax,%r15d
  mov    $0x0,%edx
  mov    $0x0,%esi
  mov    %r14,%rdi
  call   <fseek@plt>
  cmp    $0x4,%r15d
  jbe    L62
  mov    %r15d,%edi
  call   <malloc@plt>
  mov    %rax,%rbx
  lea    -0x4(%r15),%r13d
  mov    %r13d,%edi
  call   <malloc@plt>
  mov    %rax,%rbp
  mov    %r14,%rcx
  mov    %r15d,%edx
  mov    $0x1,%esi
  mov    %rbx,%rdi
  call   <fread@plt>
  mov    %r14,%rdi
  call   <fclose@plt>
  movzbl (%rbx),%eax
  sub    $0x1,%eax
  cmp    $0x3,%al
  ja     L146
  lea    0x4(%rbx),%rdi
  lea    -0x4(%r15),%ecx
  mov    $0x0,%eax
L88:
  movzbl 0x4(%rbx,%rax,1),%edx
  mov    %dl,0x0(%rbp,%rax,1)
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L88
  mov    %r13d,%edx
  mov    %rbp,%rsi
  call   <decrypt@plt>
  mov    0x18(%r12),%rdi
  lea    D92(%rip),%rsi
  call   <fopen@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L61
  mov    %rax,%rcx
  mov    %r13d,%edx
  mov    $0x1,%esi
  mov    %rbp,%rdi
  call   <fwrite@plt>
  mov    %rbx,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
  jmp    L213
L108:
  lea    D151(%rip),%rdi
  call   <puts@plt>
  mov    $0xffffffff,%eax
  jmp    L213
L223:
  mov    0x10(%r12),%rsi
  lea    D7(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xffffffff,%eax
  jmp    L213
L62:
  mov    0x10(%r12),%rsi
  lea    D39(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r14,%rdi
  call   <fclose@plt>
  mov    $0xffffffff,%eax
  jmp    L213
L146:
  mov    0x10(%r12),%rsi
  lea    D48(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xffffffff,%eax
  jmp    L213
L61:
  mov    0x10(%r12),%rsi
  lea    D99(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xffffffff,%eax
  jmp    L213
L98:
  mov    0x8(%r12),%rdi
  lea    D117(%rip),%rsi
  call   <strcmp@plt>
  mov    %rax,%rdx
  mov    $0x0,%eax
  test   %rdx,%rdx
  je     L213
  mov    0x8(%r12),%rdi
  lea    D15(%rip),%rsi
  call   <strcmp@plt>
  mov    %rax,%rdx
  mov    $0x0,%eax
  test   %rdx,%rdx
  je     L213
  mov    0x8(%r12),%rsi
  lea    D1(%rip),%rdi
  call   <printf@plt>
  mov    $0xffffffff,%eax
  jmp    L213
L264:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: label: D59
datatype: string
name: read_data
arguments: label: D76
datatype: string
name: read_data
arguments: label: D92
datatype: string
name: read_data
arguments: label: D82
datatype: string
name: read_data
arguments: label: D20
datatype: string
name: read_data
arguments: label: D7
datatype: string
name: read_data
arguments: label: D99
datatype: string
name: read_data
arguments: label: D11
datatype: string
name: read_data
arguments: label: D151
datatype: string
name: read_data
arguments: label: D39
datatype: string
name: read_data
arguments: label: D48
datatype: string
name: read_data
arguments: label: D117
datatype: string
name: read_data
arguments: label: D15
datatype: string
name: read_data
arguments: label: D1
datatype: string

tool: D59: encrypt

tool: D76: rb

tool: D92: wb

tool: D82: Expected prog_name option filename

tool: D20: Expected: prog_name encrypt input output

tool: D7: Could not open input file %s, exiting now


tool: D99: Could not open output file %s, exiting now


tool: D11: decrypt

tool: D151: Expected: prog_name decrypt input output

tool: D39: File %s is too small


tool: D48: File %s is not encrypted


tool: D117: archive

tool: D15: unarchive

tool: D1: Unrecognized option: %s, available options are:
	encrypt
	decrypt
	archive
	unarchive


assistant: ```c
int main(int argc, char *argv[]) {
  if (argc < 3) {
    printf("Expected prog_name option filename\n");
    return -1;
  }
  if (strcmp(argv[1], "encrypt") == 0) {
    if (argc != 4) {
      printf("Expected: prog_name encrypt input output\n");
      return -1;
    }
    FILE *filep;
    filep = fopen(argv[2], "rb");
    unsigned int file_length;
    unsigned char *buffer;
    unsigned char *buffer2;
    if (filep == NULL) {
      printf("Could not open input file %s, exiting now\n", argv[2]);
      return -1;
    }
    fseek(filep, 0, 2);
    file_length = ftell(filep);
    fseek(filep, 0, 0);
    buffer = malloc(file_length * sizeof(unsigned char));
    buffer2 = malloc(file_length * sizeof(unsigned char));
    fread(buffer, sizeof(unsigned char), file_length, filep);
    fclose(filep);
    int count;
    for (count = 0; count < file_length; count++) {
      buffer2[count] = buffer[count];
    }
    encrypt(buffer, buffer2, file_length);
    filep = fopen(argv[3], "wb");
    if (filep == NULL) {
      printf("Could not open output file %s, exiting now\n", argv[2]);
      return -1;
    }
    unsigned char buf2[] = {4, 3, 2, 1};
    fwrite(buf2, sizeof(unsigned char), 4, filep);
    fwrite(buffer2, sizeof(unsigned char), file_length, filep);
    fclose(filep);
  } else if (strcmp(argv[1], "decrypt") == 0) {
    if (argc != 4) {
      printf("Expected: prog_name decrypt input output\n");
      return -1;
    }
    FILE *filep;
    filep = fopen(argv[2], "rb");
    unsigned int file_length;
    unsigned char *buffer;
    unsigned char *buffer2;
    if (filep == NULL) {
      printf("Could not open input file %s, exiting now\n", argv[2]);
      return -1;
    }
    fseek(filep, 0, 2);
    file_length = ftell(filep);
    fseek(filep, 0, 0);
    if (file_length <= 4) {
      printf("File %s is too small\n", argv[2]);
      fclose(filep);
      return -1;
    }
    buffer = malloc(file_length * sizeof(unsigned char));
    buffer2 = malloc((file_length - 4) * sizeof(unsigned char));
    fread(buffer, sizeof(unsigned char), file_length, filep);
    fclose(filep);
    if ((buffer[0] != 1) && (buffer[0] != 2) && (buffer[0] != 3) && (buffer[0] != 4)) {
      printf("File %s is not encrypted\n", argv[2]);
      return -1;
    }
    buffer = &buffer[4];
    file_length -= 4;
    int count;
    for (count = 0; count < file_length; count++) {
      buffer2[count] = buffer[count];
    }
    decrypt(buffer, buffer2, file_length);
    filep = fopen(argv[3], "wb");
    if (filep == NULL) {
      printf("Could not open output file %s, exiting now\n", argv[2]);
      return -1;
    }
    fwrite(buffer2, sizeof(unsigned char), file_length, filep);
    fclose(filep);
  } else if (strcmp(argv[1], "archive") == 0) {
  } else if (strcmp(argv[1], "unarchive") == 0) {
  } else {
    printf("Unrecognized option: %s, available options are:\n\tencrypt\n\tdecrypt\n\tarchive\n\tunarchive\n", argv[1]);
    return -1;
  }
}
```