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_check_PKCS1_OAEP_mgf1>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  mov    %ecx,%r14d
  push   %r13
  push   %r12
  mov    %r8d,%r12d
  push   %rbx
  sub    $0x78,%rsp
  mov    0x18(%rbp),%rax
  mov    %rdx,-0x68(%rbp)
  mov    %esi,-0x8c(%rbp)
  mov    %rsp,%rcx
  mov    %rax,-0x50(%rbp)
  mov    0x20(%rbp),%rax
  mov    %rdi,-0x98(%rbp)
  mov    %r9,-0x80(%rbp)
  mov    %rax,-0x48(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  mov    D8(%rip),%rax
  movslq (%rax),%rax
  add    $0xf,%rax
  mov    %rax,%rsi
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rsi
  and    $0xfffffffffffffff0,%rdx
  sub    %rsi,%rcx
  cmp    %rcx,%rsp
  je     L23
L75:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L75
L23:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L101
L298:
  mov    %rax,%rdx
  mov    %rsp,%rcx
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%r9
  sub    %rax,%rcx
  and    $0xfffffffffffffff0,%rdx
  cmp    %rcx,%rsp
  je     L256
L266:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L266
L256:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L145
L121:
  cmpq   $0x0,-0x50(%rbp)
  mov    %rsp,-0x60(%rbp)
  jne    L245
  xor    %eax,%eax
  mov    %r9,-0x58(%rbp)
  call   <EVP_sha1@plt>
  mov    -0x58(%rbp),%r9
  mov    %rax,-0x50(%rbp)
L245:
  mov    -0x48(%rbp),%rax
  mov    -0x50(%rbp),%rdi
  mov    %r9,-0x58(%rbp)
  test   %rax,%rax
  cmove  %rdi,%rax
  sub    $0x1,%r12d
  mov    %rax,-0x48(%rbp)
  call   <EVP_MD_size@plt>
  mov    -0x58(%rbp),%r9
  mov    %eax,%ebx
  lea    (%rax,%rax,1),%eax
  cmp    %r12d,%eax
  jge    L292
  mov    %r12d,%r13d
  movl   $0x0,-0x58(%rbp)
  sub    %r14d,%r13d
  jns    L15
  movl   $0x1,-0x58(%rbp)
  mov    %r12d,%r14d
  xor    %r13d,%r13d
L15:
  mov    %r12d,%r15d
  mov    %r9,-0x70(%rbp)
  sub    %ebx,%r15d
  lea    (%r12,%r15,1),%edi
  call   <OPENSSL_malloc@plt>
  mov    %rax,%r12
  test   %rax,%rax
  je     L292
  movslq %r15d,%r10
  mov    %r13d,%edx
  xor    %esi,%esi
  lea    (%rax,%r10,1),%r11
  mov    %r10,-0x88(%rbp)
  mov    %r11,%rdi
  mov    %r11,-0x78(%rbp)
  call   <memset@plt>
  mov    -0x78(%rbp),%r11
  mov    -0x68(%rbp),%rsi
  movslq %r13d,%rdi
  mov    %r14d,%edx
  movslq %ebx,%r13
  add    %r11,%rdi
  call   <memcpy@plt>
  mov    -0x78(%rbp),%r11
  mov    -0x70(%rbp),%r9
  mov    %r15d,%ecx
  mov    -0x48(%rbp),%r8
  mov    %ebx,%esi
  lea    (%r11,%r13,1),%r14
  mov    %r9,%rdi
  mov    %r9,-0x68(%rbp)
  mov    %r14,%rdx
  call   <beta_PKCS1_MGF1@plt>
  test   %rax,%rax
  jne    L292
  test   %ebx,%ebx
  mov    -0x68(%rbp),%r9
  mov    -0x78(%rbp),%r11
  mov    -0x88(%rbp),%r10
  jle    L205
  nopl   0x0(%rax,%rax,1)
L252:
  movzbl (%r11,%rax,1),%edx
  xor    %dl,(%r9,%rax,1)
  add    $0x1,%rax
  cmp    %r13,%rax
  jne    L252
L205:
  mov    -0x48(%rbp),%r8
  mov    %ebx,%ecx
  mov    %r9,%rdx
  mov    %r15d,%esi
  mov    %r12,%rdi
  mov    %r10,-0x68(%rbp)
  call   <beta_PKCS1_MGF1@plt>
  mov    -0x68(%rbp),%r10
  test   %rax,%rax
  jne    L292
  xor    %eax,%eax
  test   %r15d,%r15d
  jle    L206
  cs nopw 0x0(%rax,%rax,1)
L311:
  movzbl (%r14,%rax,1),%edx
  xor    %dl,(%r12,%rax,1)
  add    $0x1,%rax
  cmp    %rax,%r10
  jne    L311
L206:
  mov    -0x50(%rbp),%r8
  mov    -0x60(%rbp),%rdx
  xor    %r9d,%r9d
  xor    %ecx,%ecx
  mov    0x10(%rbp),%esi
  mov    -0x80(%rbp),%rdi
  call   <EVP_Digest@plt>
  test   %eax,%eax
  je     L292
  mov    -0x60(%rbp),%rsi
  mov    %ebx,%edx
  mov    %r12,%rdi
  call   <CRYPTO_memcmp@plt>
  test   %rax,%rax
  jne    L161
  mov    -0x58(%rbp),%eax
  test   %eax,%eax
  jne    L161
  cmp    %r15d,%ebx
  jge    L283
  add    %r12,%r13
  jmp    L89
  nop
L318:
  add    $0x1,%ebx
  add    $0x1,%r13
  cmp    %ebx,%r15d
  je     L161
L89:
  movzbl 0x0(%r13),%eax
  test   %al,%al
  je     L318
L306:
  cmp    $0x1,%al
  jne    L161
  add    $0x1,%ebx
  sub    %ebx,%r15d
  mov    %r15d,%r13d
  cmp    -0x8c(%rbp),%r15d
  jle    L126
  mov    $0xffffffff,%r13d
L210:
  mov    %r12,%rdi
  call   <OPENSSL_free@plt>
L84:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L146
  lea    -0x28(%rbp),%rsp
  mov    %r13d,%eax
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
  xchg   %ax,%ax
L101:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L298
L283:
  je     L161
  movzbl (%r12,%r13,1),%eax
  jmp    L306
  nopl   0x0(%rax)
L126:
  movslq %ebx,%rbx
  mov    -0x98(%rbp),%rdi
  mov    %r15d,%edx
  lea    (%r12,%rbx,1),%rsi
  call   <memcpy@plt>
  jmp    L210
L161:
  mov    %r12,%rdi
  call   <OPENSSL_free@plt>
L292:
  mov    $0xffffffff,%r13d
  jmp    L84
L145:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L121
L146:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int beta_RSA_padding_check_PKCS1_OAEP_mgf1(unsigned char *to, int tlen, const unsigned char *from, int flen, int num, const unsigned char *param, int plen, const EVP_MD *md, const EVP_MD *mgf1md) {
  int i, dblen, mlen = -1;
  const unsigned char *maskeddb;
  int lzero;
  unsigned char *db = NULL, seed[EVP_MAX_MD_SIZE], phash[EVP_MAX_MD_SIZE];
  unsigned char *padded_from;
  int bad = 0;
  int mdlen;
  if (md == NULL)
    md = EVP_sha1();
  if (mgf1md == NULL)
    mgf1md = md;
  mdlen = EVP_MD_size(md);
  if (--num < 2 * mdlen + 1)
    goto decoding_err;
  lzero = num - flen;
  if (lzero < 0) {
    bad = 1;
    lzero = 0;
    flen = num;
  }
  dblen = num - mdlen;
  db = OPENSSL_malloc(dblen + num);
  if (db == NULL) {
    return -1;
  }
  padded_from = db + dblen;
  memset(padded_from, 0, lzero);
  memcpy(padded_from + lzero, from, flen);
  maskeddb = padded_from + mdlen;
  if (beta_PKCS1_MGF1(seed, mdlen, maskeddb, dblen, mgf1md))
    return -1;
  for (i = 0; i < mdlen; i++)
    seed[i] ^= padded_from[i];
  if (beta_PKCS1_MGF1(db, dblen, seed, mdlen, mgf1md))
    return -1;
  for (i = 0; i < dblen; i++)
    db[i] ^= maskeddb[i];
  if (!EVP_Digest((void *)param, plen, phash, NULL, md, NULL))
    return -1;
  if (CRYPTO_memcmp(db, phash, mdlen) != 0 || bad)
    goto decoding_err;
  else {
    for (i = mdlen; i < dblen; i++)
      if (db[i] != 0x00)
        break;
    if (i == dblen || db[i] != 0x01)
      goto decoding_err;
    else {
      mlen = dblen - ++i;
      if (tlen < mlen) {
        mlen = -1;
      } else
        memcpy(to, db + i, mlen);
    }
  }
  OPENSSL_free(db);
  return mlen;
decoding_err:
  if (db != NULL)
    OPENSSL_free(db);
  return -1;
}
```