int i2d_PrivateKey_bio(BIO *bp, EVP_PKEY *pkey)
{
    return ASN1_i2d_bio_of(EVP_PKEY, i2d_PrivateKey, bp, pkey);
}

int i2d_PUBKEY_bio(BIO *bp, EVP_PKEY *pkey)
{
    return ASN1_i2d_bio_of(EVP_PKEY, i2d_PUBKEY, bp, pkey);
}

int i2d_PKCS8_bio(BIO *bp, X509_SIG *p8)
{
    return ASN1_i2d_bio_of(X509_SIG, i2d_X509_SIG, bp, p8);
}

int i2d_PKCS8_PRIV_KEY_INFO_bio(BIO *bp, PKCS8_PRIV_KEY_INFO *p8inf)
{
    return ASN1_i2d_bio_of(PKCS8_PRIV_KEY_INFO, i2d_PKCS8_PRIV_KEY_INFO, bp,
                           p8inf);
}

int i2d_ECPrivateKey_bio(BIO *bp, EC_KEY *eckey)
{
    return ASN1_i2d_bio_of(EC_KEY, i2d_ECPrivateKey, bp, eckey);
}

int i2d_EC_PUBKEY_bio(BIO *bp, EC_KEY *ecdsa)
{
    return ASN1_i2d_bio_of(EC_KEY, i2d_EC_PUBKEY, bp, ecdsa);
}

int i2d_DSA_PUBKEY_bio(BIO *bp, DSA *dsa)
{
    return ASN1_i2d_bio_of(DSA, i2d_DSA_PUBKEY, bp, dsa);
}

int i2d_RSA_PUBKEY_bio(BIO *bp, RSA *rsa)
{
    return ASN1_i2d_bio_of(RSA, i2d_RSA_PUBKEY, bp, rsa);
}

//.........这里部分代码省略.........
				if (pk->type == EVP_PKEY_EC)
					digest=EVP_ecdsa();
#endif

				rq=X509_to_X509_REQ(x,pk,digest);
				EVP_PKEY_free(pk);
				if (rq == NULL)
					{
					ERR_print_errors(bio_err);
					goto end;
					}
				if (!noout)
					{
					X509_REQ_print(out,rq);
					PEM_write_bio_X509_REQ(out,rq);
					}
				noout=1;
				}
			else if (ocspid == i)
				{
				X509_ocspid_print(out, x);
				}
			}
		}

	if (checkend)
		{
		time_t tcheck=time(NULL) + checkoffset;

		if (X509_cmp_time(X509_get_notAfter(x), &tcheck) < 0)
			{
			BIO_printf(out,"Certificate will expire\n");
			ret=1;
			}
		else
			{
			BIO_printf(out,"Certificate will not expire\n");
			ret=0;
			}
		goto end;
		}

	if (noout)
		{
		ret=0;
		goto end;
		}

	if 	(outformat == FORMAT_ASN1)
		i=i2d_X509_bio(out,x);
	else if (outformat == FORMAT_PEM)
		{
		if (trustout) i=PEM_write_bio_X509_AUX(out,x);
		else i=PEM_write_bio_X509(out,x);
		}
	else if (outformat == FORMAT_NETSCAPE)
		{
		ASN1_HEADER ah;
		ASN1_OCTET_STRING os;

		os.data=(unsigned char *)NETSCAPE_CERT_HDR;
		os.length=strlen(NETSCAPE_CERT_HDR);
		ah.header= &os;
		ah.data=(char *)x;
		ah.meth=X509_asn1_meth();

		i=ASN1_i2d_bio_of(ASN1_HEADER,i2d_ASN1_HEADER,out,&ah);
		}
	else	{
		BIO_printf(bio_err,"bad output format specified for outfile\n");
		goto end;
		}
	if (!i)
		{
		BIO_printf(bio_err,"unable to write certificate\n");
		ERR_print_errors(bio_err);
		goto end;
		}
	ret=0;
end:
	if (need_rand)
		app_RAND_write_file(NULL, bio_err);
	OBJ_cleanup();
	NCONF_free(extconf);
	BIO_free_all(out);
	BIO_free_all(STDout);
	X509_STORE_free(ctx);
	X509_REQ_free(req);
	X509_free(x);
	X509_free(xca);
	EVP_PKEY_free(Upkey);
	EVP_PKEY_free(CApkey);
	X509_REQ_free(rq);
	ASN1_INTEGER_free(sno);
	sk_ASN1_OBJECT_pop_free(trust, ASN1_OBJECT_free);
	sk_ASN1_OBJECT_pop_free(reject, ASN1_OBJECT_free);
	if (passin) OPENSSL_free(passin);
	apps_shutdown();
	OPENSSL_EXIT(ret);
	}