user: What would the C source look like for the assembly code provided here?

```asm
<cryptData>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  mov    %rsi,%r15
  push   %r14
  push   %r13
  mov    %rcx,%r13
  push   %r12
  mov    %r8d,%r12d
  push   %rbx
  mov    %edx,%ebx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  movslq %r8d,%rax
  mov    %rsp,%rcx
  add    $0xf,%rax
  mov    %rax,%rsi
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rsi
  and    $0xfffffffffffffff0,%rdx
  sub    %rsi,%rcx
  cmp    %rcx,%rsp
  je     L103
L139:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L139
L103:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L59
L56:
  mov    %rax,%rsi
  mov    %rsp,%rcx
  mov    %rax,%rdx
  mov    %rsp,%r8
  and    $0xfffffffffffff000,%rsi
  and    $0xfffffffffffffff0,%rdx
  sub    %rsi,%rcx
  cmp    %rcx,%rsp
  je     L52
L35:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L35
L52:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L121
L64:
  mov    %rax,%rdx
  mov    %rsp,%rcx
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%r9
  sub    %rax,%rcx
  and    $0xfffffffffffffff0,%rdx
  cmp    %rcx,%rsp
  je     L125
L29:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L29
L125:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  je     L74
  orq    $0x0,-0x8(%rsp,%rdx,1)
L74:
  mov    %r8,%rsi
  mov    %r12d,%edx
  mov    %r9,-0x48(%rbp)
  mov    %rsp,%r14
  mov    %r8,-0x50(%rbp)
  call   <slv_to_uchar@plt>
  mov    -0x48(%rbp),%rsi
  mov    %r12d,%edx
  mov    %r15,%rdi
  call   <slv_to_uchar@plt>
  mov    -0x48(%rbp),%r9
  mov    -0x50(%rbp),%r8
  test   %bl,%bl
  mov    %rsp,%rcx
  mov    %r12d,%esi
  mov    %r9,%rdx
  mov    %r8,%rdi
  je     L109
  call   <encrypt@plt>
  mov    %eax,%esi
L101:
  cmp    $0x10,%esi
  je     L44
  lea    D5(%rip),%rdi
  call   <printf@plt>
L44:
  mov    %r12d,%edx
  mov    %r13,%rsi
  mov    %r14,%rdi
  call   <uchar_to_slv@plt>
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L149
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
  nopl   0x0(%rax)
L59:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L56
  nopl   0x0(%rax,%rax,1)
L121:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L64
  nopl   0x0(%rax,%rax,1)
L109:
  call   <decrypt@plt>
  mov    %eax,%esi
  jmp    L101
L149:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: parse_data
arguments: data_tag: D5
type_guessed: string

tool: D5: Warning: crypt operation returned with unexpected length %d


assistant: ```c
void cryptData(char *datain, char *key, char mode, char *dataout, int bytelen) {
  int crypt_len;
  unsigned char c_din[bytelen];
  unsigned char c_key[bytelen];
  unsigned char c_dout[bytelen];
  slv_to_uchar(datain, c_din, bytelen);
  slv_to_uchar(key, c_key, bytelen);
  if (mode) {
    crypt_len = encrypt(c_din, bytelen, c_key, c_dout);
  } else {
    crypt_len = decrypt(c_din, bytelen, c_key, c_dout);
  }
  if (crypt_len != 16) {
    printf("Warning: crypt operation returned with unexpected length %d\n", crypt_len);
  }
  uchar_to_slv(c_dout, dataout, bytelen);
  return;
}
```