user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<beta_RSA_padding_add_PKCS1_OAEP_mgf1>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  mov    %ecx,%r15d
  push   %r14
  push   %r13
  mov    %rdi,%r13
  push   %r12
  push   %rbx
  lea    -0x1(%rsi),%ebx
  sub    $0x58,%rsp
  mov    %rdx,-0x60(%rbp)
  mov    0x18(%rbp),%r14
  mov    %r8,-0x50(%rbp)
  mov    %rsp,%rcx
  mov    0x10(%rbp),%r8
  mov    %r9d,-0x58(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  mov    D9(%rip),%rax
  movslq (%rax),%rax
  add    $0xf,%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rcx
  and    $0xfffffffffffffff0,%rdx
  cmp    %rcx,%rsp
  je     L79
L127:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L127
L79:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L170
L151:
  mov    %rsp,-0x78(%rbp)
  test   %r8,%r8
  jne    L29
  xor    %eax,%eax
  call   <EVP_sha1@plt>
  mov    %rax,%r8
L29:
  test   %r14,%r14
  mov    %r8,%rdi
  mov    %r8,-0x48(%rbp)
  cmove  %r8,%r14
  call   <EVP_MD_size@plt>
  lea    (%rax,%rax,1),%r10d
  mov    %eax,%r12d
  mov    %ebx,%eax
  sub    %r10d,%eax
  mov    %eax,-0x64(%rbp)
  cmp    %ebx,%r10d
  jge    L113
  cmp    %r15d,%eax
  mov    -0x48(%rbp),%r8
  jle    L113
  movslq %r12d,%rax
  movb   $0x0,0x0(%r13)
  mov    -0x58(%rbp),%esi
  xor    %r9d,%r9d
  lea    0x1(%r13,%rax,1),%r11
  mov    -0x50(%rbp),%rdi
  xor    %ecx,%ecx
  mov    %r10d,-0x68(%rbp)
  mov    %r11,%rdx
  mov    %rax,-0x48(%rbp)
  mov    %r11,-0x70(%rbp)
  call   <EVP_Digest@plt>
  test   %eax,%eax
  jne    L48
  nopw   0x0(%rax,%rax,1)
L113:
  xor    %eax,%eax
L158:
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  jne    L162
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
  nopl   0x0(%rax)
L48:
  mov    -0x68(%rbp),%r10d
  mov    %ebx,%ecx
  mov    -0x70(%rbp),%r11
  lea    0x1(%r13),%rsi
  sub    %r15d,%ecx
  mov    -0x48(%rbp),%rax
  mov    %rsi,-0x50(%rbp)
  xor    %esi,%esi
  sub    %r10d,%ecx
  mov    %r11,-0x58(%rbp)
  lea    -0x1(%rcx),%edx
  lea    (%r11,%rax,1),%rdi
  mov    %ecx,-0x68(%rbp)
  call   <memset@plt>
  mov    -0x68(%rbp),%ecx
  mov    -0x58(%rbp),%r11
  movslq %r15d,%rax
  movslq %ebx,%rdi
  mov    -0x60(%rbp),%rsi
  mov    %r15d,%edx
  add    %r12d,%ecx
  sub    %rax,%rdi
  sub    -0x48(%rbp),%rdi
  mov    %r11,-0x48(%rbp)
  movslq %ecx,%rcx
  add    %r11,%rdi
  movb   $0x1,-0x1(%r11,%rcx,1)
  call   <memcpy@plt>
  mov    -0x50(%rbp),%r15
  mov    %r12d,%esi
  mov    %r15,%rdi
  call   <RAND_bytes@plt>
  test   %rax,%rax
  jle    L113
  mov    -0x64(%rbp),%r9d
  add    %r12d,%r9d
  mov    %r9d,%edi
  mov    %r9d,-0x50(%rbp)
  call   <OPENSSL_malloc@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L113
  mov    -0x50(%rbp),%esi
  mov    %r14,%r8
  mov    %r12d,%ecx
  mov    %r15,%rdx
  mov    %rax,%rdi
  call   <beta_PKCS1_MGF1@plt>
  test   %rax,%rax
  js     L113
  mov    -0x50(%rbp),%r9d
  mov    -0x48(%rbp),%r11
  test   %r9d,%r9d
  jle    L134
  movslq %r9d,%rcx
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L156:
  movzbl (%rbx,%rax,1),%edx
  xor    %dl,(%r11,%rax,1)
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L156
L134:
  mov    -0x78(%rbp),%r15
  mov    %r14,%r8
  mov    %r9d,%ecx
  mov    %r11,%rdx
  mov    %r12d,%esi
  mov    %r15,%rdi
  call   <beta_PKCS1_MGF1@plt>
  test   %rax,%rax
  js     L113
  test   %r12d,%r12d
  jle    L22
  lea    0x1(%r12),%ecx
  mov    $0x1,%eax
  mov    %r15,%rsi
  nopl   0x0(%rax)
L83:
  movzbl -0x1(%rsi,%rax,1),%edx
  xor    %dl,0x0(%r13,%rax,1)
  add    $0x1,%rax
  cmp    %rcx,%rax
  jne    L83
L22:
  mov    %rbx,%rdi
  call   <OPENSSL_free@plt>
  mov    $0x1,%eax
  jmp    L158
  nopl   (%rax)
L170:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L151
L162:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int beta_RSA_padding_add_PKCS1_OAEP_mgf1(unsigned char *to, int tlen, const unsigned char *from, int flen, const unsigned char *param, int plen, const EVP_MD *md, const EVP_MD *mgf1md) {
  int i, emlen = tlen - 1;
  unsigned char *db, *seed;
  unsigned char *dbmask, seedmask[EVP_MAX_MD_SIZE];
  int mdlen;
  if (md == NULL)
    md = EVP_sha1();
  if (mgf1md == NULL)
    mgf1md = md;
  mdlen = EVP_MD_size(md);
  if (flen > emlen - 2 * mdlen - 1) {
    return 0;
  }
  if (emlen < 2 * mdlen + 1) {
    return 0;
  }
  to[0] = 0;
  seed = to + 1;
  db = to + mdlen + 1;
  if (!EVP_Digest((void *)param, plen, db, NULL, md, NULL))
    return 0;
  memset(db + mdlen, 0, emlen - flen - 2 * mdlen - 1);
  db[emlen - flen - mdlen - 1] = 0x01;
  memcpy(db + emlen - flen - mdlen, from, (unsigned int)flen);
  if (RAND_bytes(seed, mdlen) <= 0)
    return 0;
  dbmask = OPENSSL_malloc(emlen - mdlen);
  if (dbmask == NULL) {
    return 0;
  }
  if (beta_PKCS1_MGF1(dbmask, emlen - mdlen, seed, mdlen, mgf1md) < 0)
    return 0;
  for (i = 0; i < emlen - mdlen; i++)
    db[i] ^= dbmask[i];
  if (beta_PKCS1_MGF1(seedmask, mdlen, db, emlen - mdlen, mgf1md) < 0)
    return 0;
  for (i = 0; i < mdlen; i++)
    seed[i] ^= seedmask[i];
  OPENSSL_free(dbmask);
  return 1;
}
```