user: 下面的汇编指令对应的C源代码是什么：

```asm
<pbkdf2_sha1>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0xa0,%rsp
  mov    %rdi,-0x78(%rbp)
  mov    %rsi,-0x80(%rbp)
  mov    %rdx,-0x88(%rbp)
  mov    %rcx,-0x90(%rbp)
  mov    %r8d,-0x94(%rbp)
  mov    %r9,-0xa0(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x14,-0x5c(%rbp)
  mov    -0x90(%rbp),%rax
  add    $0x4,%rax
  mov    %rax,-0x50(%rbp)
  cmpl   $0x0,-0x94(%rbp)
  je     L53
  cmpq   $0x0,0x10(%rbp)
  je     L53
  mov    $0xffffffff,%eax
  cmp    %rax,0x10(%rbp)
  jbe    L85
L53:
  mov    $0x0,%eax
  jmp    L63
L85:
  mov    0x10(%rbp),%rax
  sub    $0x1,%eax
  mov    $0x0,%edx
  divl   -0x5c(%rbp)
  add    $0x1,%eax
  mov    %eax,-0x58(%rbp)
  mov    0x10(%rbp),%rax
  mov    %eax,%ecx
  mov    -0x58(%rbp),%eax
  sub    $0x1,%eax
  imul   -0x5c(%rbp),%eax
  mov    %eax,%edx
  mov    %ecx,%eax
  sub    %edx,%eax
  mov    %eax,-0x54(%rbp)
  mov    -0x50(%rbp),%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x48(%rbp)
  cmpq   $0x0,-0x48(%rbp)
  jne    L133
  mov    $0x0,%eax
  jmp    L63
L133:
  mov    -0x90(%rbp),%rax
  mov    %eax,%edx
  mov    -0x88(%rbp),%rcx
  mov    -0x48(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  movl   $0x1,-0x64(%rbp)
  jmp    L129
L138:
  mov    -0x5c(%rbp),%edx
  lea    -0x20(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  movl   $0x1,-0x68(%rbp)
  jmp    L128
L132:
  cmpl   $0x1,-0x68(%rbp)
  jne    L40
  mov    -0x64(%rbp),%eax
  shr    $0x18,%eax
  mov    %eax,%ecx
  mov    -0x48(%rbp),%rdx
  mov    -0x90(%rbp),%rax
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x64(%rbp),%eax
  shr    $0x10,%eax
  mov    %eax,%edx
  mov    -0x90(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  mov    %dl,(%rax)
  mov    -0x64(%rbp),%eax
  shr    $0x8,%eax
  mov    %eax,%edx
  mov    -0x90(%rbp),%rax
  lea    0x2(%rax),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  mov    %dl,(%rax)
  mov    -0x90(%rbp),%rax
  lea    0x3(%rax),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    -0x64(%rbp),%edx
  mov    %dl,(%rax)
  mov    -0x50(%rbp),%rax
  mov    %eax,%edi
  lea    -0x40(%rbp),%rcx
  mov    -0x48(%rbp),%rdx
  mov    -0x80(%rbp),%rsi
  mov    -0x78(%rbp),%rax
  mov    %rcx,%r8
  mov    %edi,%ecx
  mov    %rax,%rdi
  call   <hmac_sha1@plt>
  jmp    L15
L40:
  lea    -0x40(%rbp),%rdi
  mov    -0x5c(%rbp),%ecx
  lea    -0x40(%rbp),%rdx
  mov    -0x80(%rbp),%rsi
  mov    -0x78(%rbp),%rax
  mov    %rdi,%r8
  mov    %rax,%rdi
  call   <hmac_sha1@plt>
L15:
  movl   $0x0,-0x60(%rbp)
  jmp    L4
L37:
  mov    -0x60(%rbp),%eax
  movzbl -0x20(%rbp,%rax,1),%edx
  mov    -0x60(%rbp),%eax
  movzbl -0x40(%rbp,%rax,1),%eax
  xor    %eax,%edx
  mov    -0x60(%rbp),%eax
  mov    %dl,-0x20(%rbp,%rax,1)
  addl   $0x1,-0x60(%rbp)
L4:
  mov    -0x60(%rbp),%eax
  cmp    -0x5c(%rbp),%eax
  jb     L37
  addl   $0x1,-0x68(%rbp)
L128:
  mov    -0x68(%rbp),%eax
  cmp    -0x94(%rbp),%eax
  jbe    L132
  mov    -0x64(%rbp),%eax
  cmp    -0x58(%rbp),%eax
  jne    L74
  mov    -0x54(%rbp),%eax
  jmp    L43
L74:
  mov    -0x5c(%rbp),%eax
L43:
  mov    -0x64(%rbp),%edx
  sub    $0x1,%edx
  imul   -0x5c(%rbp),%edx
  mov    %edx,%ecx
  mov    -0xa0(%rbp),%rdx
  lea    (%rcx,%rdx,1),%rdi
  lea    -0x20(%rbp),%rcx
  mov    %eax,%edx
  mov    %rcx,%rsi
  call   <memcpy@plt>
  addl   $0x1,-0x64(%rbp)
L129:
  mov    -0x64(%rbp),%eax
  cmp    -0x58(%rbp),%eax
  jbe    L138
  mov    -0x48(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x1,%eax
L63:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L36
  call   <__stack_chk_fail@plt>
L36:
  leave
  ret
```

assistant: ```c
int pbkdf2_sha1(const char *password, size_t Plen, const char *salt, size_t Slen, unsigned int c, char *derivedKey, size_t dkLen) {
  unsigned int hLen = 20;
  char U[20], T[20];
  unsigned int u, l, r, i, k;
  char *tmp;
  size_t tmplen = Slen + 4;
  if (!c || !dkLen || dkLen > 4294967295U)
    return 0;
  l = (((int)dkLen - 1) / hLen) + 1;
  r = (int)dkLen - (l - 1) * hLen;
  if (!(tmp = (char *)malloc(tmplen)))
    return 0;
  memcpy(tmp, salt, Slen);
  for (i = 1; i <= l; i++) {
    memset(T, 0, hLen);
    for (u = 1; u <= c; u++) {
      if (u == 1) {
        tmp[Slen + 0] = (i & 0xff000000) >> 24;
        tmp[Slen + 1] = (i & 0x00ff0000) >> 16;
        tmp[Slen + 2] = (i & 0x0000ff00) >> 8;
        tmp[Slen + 3] = (i & 0x000000ff) >> 0;
        hmac_sha1(password, Plen, tmp, tmplen, U);
      } else
        hmac_sha1(password, Plen, U, hLen, U);
      for (k = 0; k < hLen; k++)
        T[k] ^= U[k];
    }
    memcpy(derivedKey + (i - 1) * hLen, T, i == l ? r : hLen);
  }
  free(tmp);
  return 1;
}
```