user: 请将以下的汇编代码转换成C语言代码：

```asm
<sm2_ec_group>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    $0x0,%eax
  call   <EC_GFp_mont_method@plt>
  mov    %eax,%edi
  call   <EC_GROUP_new@plt>
  mov    %rax,-0x20(%rbp)
  mov    $0x0,%eax
  call   <BN_CTX_new@plt>
  mov    %rax,-0x18(%rbp)
  movq   $0x0,-0x50(%rbp)
  movq   $0x0,-0x48(%rbp)
  movq   $0x0,-0x40(%rbp)
  lea    -0x50(%rbp),%rax
  lea    D29(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <BN_hex2bn@plt>
  lea    -0x48(%rbp),%rax
  lea    D58(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <BN_hex2bn@plt>
  lea    -0x40(%rbp),%rax
  lea    D25(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <BN_hex2bn@plt>
  mov    -0x40(%rbp),%rcx
  mov    -0x48(%rbp),%rdx
  mov    -0x50(%rbp),%rsi
  mov    -0x18(%rbp),%rdi
  mov    -0x20(%rbp),%rax
  mov    %rdi,%r8
  mov    %rax,%rdi
  call   <EC_GROUP_set_curve_GFp@plt>
  cmp    $0x1,%eax
  je     L4
  mov    $0x0,%eax
  jmp    L29
L4:
  movq   $0x0,-0x38(%rbp)
  movq   $0x0,-0x30(%rbp)
  movq   $0x0,-0x28(%rbp)
  lea    -0x38(%rbp),%rax
  lea    D27(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <BN_hex2bn@plt>
  lea    -0x30(%rbp),%rax
  lea    D36(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <BN_hex2bn@plt>
  lea    -0x28(%rbp),%rax
  lea    D48(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <BN_hex2bn@plt>
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <EC_POINT_new@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x30(%rbp),%rcx
  mov    -0x38(%rbp),%rdx
  mov    -0x18(%rbp),%rdi
  mov    -0x10(%rbp),%rsi
  mov    -0x20(%rbp),%rax
  mov    %rdi,%r8
  mov    %rax,%rdi
  call   <EC_POINT_set_affine_coordinates_GFp@plt>
  mov    $0x0,%eax
  call   <BN_value_one@plt>
  mov    %eax,%ecx
  mov    -0x28(%rbp),%rdx
  mov    -0x10(%rbp),%rsi
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <EC_GROUP_set_generator@plt>
  mov    -0x50(%rbp),%rax
  mov    %rax,%rdi
  call   <BN_free@plt>
  mov    -0x48(%rbp),%rax
  mov    %rax,%rdi
  call   <BN_free@plt>
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <BN_free@plt>
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <BN_free@plt>
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <BN_free@plt>
  mov    -0x28(%rbp),%rax
  mov    %rax,%rdi
  call   <BN_free@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <BN_CTX_free@plt>
  mov    -0x20(%rbp),%rax
L29:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L1
  call   <__stack_chk_fail@plt>
L1:
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: label: D29
type_guessed: string
name: disassemble_data
arguments: label: D58
type_guessed: string
name: disassemble_data
arguments: label: D25
type_guessed: string
name: disassemble_data
arguments: label: D27
type_guessed: string
name: disassemble_data
arguments: label: D36
type_guessed: string
name: disassemble_data
arguments: label: D48
type_guessed: string

tool: D29: 8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3

tool: D58: 787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498

tool: D25: 63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A

tool: D27: 421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D

tool: D36: 0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2

tool: D48: 8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7

assistant: ```c
EC_GROUP *sm2_ec_group() {
  EC_GROUP *ecg = EC_GROUP_new(EC_GFp_mont_method());
  BN_CTX *ctx = BN_CTX_new();
  BIGNUM *p = NULL, *a = NULL, *b = NULL;
  BN_hex2bn(&p, "8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3");
  BN_hex2bn(&a, "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498");
  BN_hex2bn(&b, "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A");
  if (EC_GROUP_set_curve_GFp(ecg, p, a, b, ctx) != 1)
    return 0;
  ;
  BIGNUM *Gx = NULL, *Gy = NULL, *N = NULL;
  BN_hex2bn(&Gx, "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D");
  BN_hex2bn(&Gy, "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2");
  BN_hex2bn(&N, "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7");
  EC_POINT *generator = EC_POINT_new(ecg);
  EC_POINT_set_affine_coordinates_GFp(ecg, generator, Gx, Gy, ctx);
  EC_GROUP_set_generator(ecg, generator, N, BN_value_one());
  BN_free(p);
  BN_free(a);
  BN_free(b);
  BN_free(Gx);
  BN_free(Gy);
  BN_free(N);
  BN_CTX_free(ctx);
  return ecg;
}
```