req.c

mediastreamer2是开源的网络传输媒体流的库

	if (template != NULL)
		{
		long errline = -1;

		if( verbose )
			BIO_printf(bio_err,"Using configuration from %s\n",template);
		req_conf=NCONF_new(NULL);
		i=NCONF_load(req_conf,template,&errline);
		if (i == 0)
			{
			BIO_printf(bio_err,"error on line %ld of %s\n",errline,template);
			goto end;
			}
		}
	else
		{
		req_conf=config;

		if (req_conf == NULL)
			{
			BIO_printf(bio_err,"Unable to load config info from %s\n", default_config_file);
			if (newreq)
				goto end;
			}
		else if( verbose )
			BIO_printf(bio_err,"Using configuration from %s\n",
			default_config_file);
		}

	if (req_conf != NULL)
		{
		if (!load_config(bio_err, req_conf))
			goto end;
		p=NCONF_get_string(req_conf,NULL,"oid_file");
		if (p == NULL)
			ERR_clear_error();
		if (p != NULL)
			{
			BIO *oid_bio;

			oid_bio=BIO_new_file(p,"r");
			if (oid_bio == NULL) 
				{
				/*
				BIO_printf(bio_err,"problems opening %s for extra oid's\n",p);
				ERR_print_errors(bio_err);
				*/
				}
			else
				{
				OBJ_create_objects(oid_bio);
				BIO_free(oid_bio);
				}
			}
		}
	if(!add_oid_section(bio_err, req_conf)) goto end;

	if (md_alg == NULL)
		{
		p=NCONF_get_string(req_conf,SECTION,"default_md");
		if (p == NULL)
			ERR_clear_error();
		if (p != NULL)
			{
			if ((md_alg=EVP_get_digestbyname(p)) != NULL)
				digest=md_alg;
			}
		}

	if (!extensions)
		{
		extensions = NCONF_get_string(req_conf, SECTION, V3_EXTENSIONS);
		if (!extensions)
			ERR_clear_error();
		}
	if (extensions) {
		/* Check syntax of file */
		X509V3_CTX ctx;
		X509V3_set_ctx_test(&ctx);
		X509V3_set_nconf(&ctx, req_conf);
		if(!X509V3_EXT_add_nconf(req_conf, &ctx, extensions, NULL)) {
			BIO_printf(bio_err,
			 "Error Loading extension section %s\n", extensions);
			goto end;
		}
	}

	if(!passin)
		{
		passin = NCONF_get_string(req_conf, SECTION, "input_password");
		if (!passin)
			ERR_clear_error();
		}
	
	if(!passout)
		{
		passout = NCONF_get_string(req_conf, SECTION, "output_password");
		if (!passout)
			ERR_clear_error();
		}

	p = NCONF_get_string(req_conf, SECTION, STRING_MASK);
	if (!p)
		ERR_clear_error();

	if(p && !ASN1_STRING_set_default_mask_asc(p)) {
		BIO_printf(bio_err, "Invalid global string mask setting %s\n", p);
		goto end;
	}

	if (chtype != MBSTRING_UTF8)
		{
		p = NCONF_get_string(req_conf, SECTION, UTF8_IN);
		if (!p)
			ERR_clear_error();
		else if (!strcmp(p, "yes"))
			chtype = MBSTRING_UTF8;
		}


	if(!req_exts)
		{
		req_exts = NCONF_get_string(req_conf, SECTION, REQ_EXTENSIONS);
		if (!req_exts)
			ERR_clear_error();
		}
	if(req_exts) {
		/* Check syntax of file */
		X509V3_CTX ctx;
		X509V3_set_ctx_test(&ctx);
		X509V3_set_nconf(&ctx, req_conf);
		if(!X509V3_EXT_add_nconf(req_conf, &ctx, req_exts, NULL)) {
			BIO_printf(bio_err,
			 "Error Loading request extension section %s\n",
								req_exts);
			goto end;
		}
	}

	in=BIO_new(BIO_s_file());
	out=BIO_new(BIO_s_file());
	if ((in == NULL) || (out == NULL))
		goto end;

#ifndef OPENSSL_NO_ENGINE
        e = setup_engine(bio_err, engine, 0);
#endif

	if (keyfile != NULL)
		{
		pkey = load_key(bio_err, keyfile, keyform, 0, passin, e,
			"Private Key");
		if (!pkey)
			{
			/* load_key() has already printed an appropriate
			   message */
			goto end;
			}
		if (EVP_PKEY_type(pkey->type) == EVP_PKEY_DSA || 
			EVP_PKEY_type(pkey->type) == EVP_PKEY_EC)
			{
			char *randfile = NCONF_get_string(req_conf,SECTION,"RANDFILE");
			if (randfile == NULL)
				ERR_clear_error();
			app_RAND_load_file(randfile, bio_err, 0);
			}
		}

	if (newreq && (pkey == NULL))
		{
#ifndef OPENSSL_NO_RSA
		BN_GENCB cb;
#endif
		char *randfile = NCONF_get_string(req_conf,SECTION,"RANDFILE");
		if (randfile == NULL)
			ERR_clear_error();
		app_RAND_load_file(randfile, bio_err, 0);
		if (inrand)
			app_RAND_load_files(inrand);
	
		if (newkey <= 0)
			{
			if (!NCONF_get_number(req_conf,SECTION,BITS, &newkey))
				newkey=DEFAULT_KEY_LENGTH;
			}

		if (newkey < MIN_KEY_LENGTH && (pkey_type == TYPE_RSA || pkey_type == TYPE_DSA))
			{
			BIO_printf(bio_err,"private key length is too short,\n");
			BIO_printf(bio_err,"it needs to be at least %d bits, not %ld\n",MIN_KEY_LENGTH,newkey);
			goto end;
			}
		BIO_printf(bio_err,"Generating a %ld bit %s private key\n",
			newkey,(pkey_type == TYPE_RSA)?"RSA":
			(pkey_type == TYPE_DSA)?"DSA":"EC");

		if ((pkey=EVP_PKEY_new()) == NULL) goto end;

#ifndef OPENSSL_NO_RSA
		BN_GENCB_set(&cb, req_cb, bio_err);
		if (pkey_type == TYPE_RSA)
			{
			RSA *rsa = RSA_new();
			BIGNUM *bn = BN_new();
			if(!bn || !rsa || !BN_set_word(bn, 0x10001) ||
					!RSA_generate_key_ex(rsa, newkey, bn, &cb) ||
					!EVP_PKEY_assign_RSA(pkey, rsa))
				{
				if(bn) BN_free(bn);
				if(rsa) RSA_free(rsa);
				goto end;
				}
			BN_free(bn);
			}
		else
#endif
#ifndef OPENSSL_NO_DSA
			if (pkey_type == TYPE_DSA)
			{
			if (!DSA_generate_key(dsa_params)) goto end;
			if (!EVP_PKEY_assign_DSA(pkey,dsa_params)) goto end;
			dsa_params=NULL;
			}
#endif
#ifndef OPENSSL_NO_ECDSA
			if (pkey_type == TYPE_EC)
			{
			if (!EC_KEY_generate_key(ec_params)) goto end;
			if (!EVP_PKEY_assign_EC_KEY(pkey, ec_params)) 
				goto end;
			ec_params = NULL;
			}
#endif

		app_RAND_write_file(randfile, bio_err);

		if (pkey == NULL) goto end;

		if (keyout == NULL)
			{
			keyout=NCONF_get_string(req_conf,SECTION,KEYFILE);
			if (keyout == NULL)
				ERR_clear_error();
			}
		
		if (keyout == NULL)
			{
			BIO_printf(bio_err,"writing new private key to stdout\n");
			BIO_set_fp(out,stdout,BIO_NOCLOSE);
#ifdef OPENSSL_SYS_VMS
			{
			BIO *tmpbio = BIO_new(BIO_f_linebuffer());
			out = BIO_push(tmpbio, out);
			}
#endif
			}
		else
			{
			BIO_printf(bio_err,"writing new private key to '%s'\n",keyout);
			if (BIO_write_filename(out,keyout) <= 0)
				{
				perror(keyout);
				goto end;
				}
			}

		p=NCONF_get_string(req_conf,SECTION,"encrypt_rsa_key");
		if (p == NULL)
			{
			ERR_clear_error();
			p=NCONF_get_string(req_conf,SECTION,"encrypt_key");
			if (p == NULL)
				ERR_clear_error();
			}
		if ((p != NULL) && (strcmp(p,"no") == 0))
			cipher=NULL;
		if (nodes) cipher=NULL;
		
		i=0;
loop:
		if (!PEM_write_bio_PrivateKey(out,pkey,cipher,
			NULL,0,NULL,passout))
			{
			if ((ERR_GET_REASON(ERR_peek_error()) ==
				PEM_R_PROBLEMS_GETTING_PASSWORD) && (i < 3))
				{
				ERR_clear_error();
				i++;
				goto loop;
				}
			goto end;
			}
		BIO_printf(bio_err,"-----\n");
		}

	if (!newreq)
		{
		/* Since we are using a pre-existing certificate
		 * request, the kludge 'format' info should not be
		 * changed. */
		kludge= -1;
		if (infile == NULL)
			BIO_set_fp(in,stdin,BIO_NOCLOSE);
		else
			{
			if (BIO_read_filename(in,infile) <= 0)
				{
				perror(infile);
				goto end;
				}
			}

		if	(informat == FORMAT_ASN1)
			req=d2i_X509_REQ_bio(in,NULL);
		else if (informat == FORMAT_PEM)
			req=PEM_read_bio_X509_REQ(in,NULL,NULL,NULL);
		else
			{
			BIO_printf(bio_err,"bad input format specified for X509 request\n");
			goto end;
			}
		if (req == NULL)
			{
			BIO_printf(bio_err,"unable to load X509 request\n");
			goto end;
			}
		}

	if (newreq || x509)
		{
		if (pkey == NULL)
			{
			BIO_printf(bio_err,"you need to specify a private key\n");
			goto end;
			}
#ifndef OPENSSL_NO_DSA
		if (pkey->type == EVP_PKEY_DSA)
			digest=EVP_dss1();
#endif
#ifndef OPENSSL_NO_ECDSA
		if (pkey->type == EVP_PKEY_EC)
			digest=EVP_ecdsa();
#endif
		if (req == NULL)
			{
			req=X509_REQ_new();
			if (req == NULL)
				{
				goto end;
				}

			i=make_REQ(req,pkey,subj,multirdn,!x509, chtype);
			subj=NULL; /* done processing '-subj' option */
			if ((kludge > 0) && !sk_X509_ATTRIBUTE_num(req->req_info->attributes))
				{
				sk_X509_ATTRIBUTE_free(req->req_info->attributes);
				req->req_info->attributes = NULL;
				}
			if (!i)
				{
				BIO_printf(bio_err,"problems making Certificate Request\n");
				goto end;
				}
			}
		if (x509)
			{
			EVP_PKEY *tmppkey;
			X509V3_CTX ext_ctx;
			if ((x509ss=X509_new()) == NULL) goto end;

			/* Set version to V3 */
			if(extensions && !X509_set_version(x509ss, 2)) goto end;
			if (serial)
				{
				if (!X509_set_serialNumber(x509ss, serial)) goto end;
				}
			else
				{
				if (!rand_serial(NULL,
					X509_get_serialNumber(x509ss)))
						goto end;
				}

			if (!X509_set_issuer_name(x509ss, X509_REQ_get_subject_name(req))) goto end;
			if (!X509_gmtime_adj(X509_get_notBefore(x509ss),0)) goto end;
			if (!X509_gmtime_adj(X509_get_notAfter(x509ss), (long)60*60*24*days)) goto end;
			if (!X509_set_subject_name(x509ss, X509_REQ_get_subject_name(req))) goto end;
			tmppkey = X509_REQ_get_pubkey(req);
			if (!tmppkey || !X509_set_pubkey(x509ss,tmppkey)) goto end;
			EVP_PKEY_free(tmppkey);

			/* Set up V3 context struct */

			X509V3_set_ctx(&ext_ctx, x509ss, x509ss, NULL, NULL, 0);
			X509V3_set_nconf(&ext_ctx, req_conf);

			/* Add extensions */
			if(extensions && !X509V3_EXT_add_nconf(req_conf, 
				 	&ext_ctx, extensions, x509ss))
				{
				BIO_printf(bio_err,
					"Error Loading extension section %s\n",
					extensions);
				goto end;
				}
			
			if (!(i=X509_sign(x509ss,pkey,digest)))
				goto end;
			}
		else
			{
			X509V3_CTX ext_ctx;

			/* Set up V3 context struct */

			X509V3_set_ctx(&ext_ctx, NULL, NULL, req, NULL, 0);
			X509V3_set_nconf(&ext_ctx, req_conf);

			/* Add extensions */
			if(req_exts && !X509V3_EXT_REQ_add_nconf(req_conf, 
				 	&ext_ctx, req_exts, req))
				{
				BIO_printf(bio_err,
					"Error Loading extension section %s\n",
					req_exts);
				goto end;
				}
			if (!(i=X509_REQ_sign(req,pkey,digest)))
				goto end;
			}
		}

	if (subj && x509)
		{
		BIO_printf(bio_err, "Cannot modifiy certificate subject\n");
		goto end;
		}

	if (subj && !x509)
		{
		if (verbose)
			{
			BIO_printf(bio_err, "Modifying Request's Subject\n");
			print_name(bio_err, "old subject=", X509_REQ_get_subject_name(req), nmflag);
			}

		if (build_subject(req, subj, chtype, multirdn) == 0)
			{
			BIO_printf(bio_err, "ERROR: cannot modify subject\n");
			ex=1;
			goto end;
			}

		req->req_info->enc.modified = 1;

		if (verbose)
			{
			print_name(bio_err, "new subject=", X509_REQ_get_subject_name(req), nmflag);
			}
		}

	if (verify && !x509)
		{
		int tmp=0;

		if (pkey == NULL)
			{
			pkey=X509_REQ_get_pubkey(req);
			tmp=1;
			if (pkey == NULL) goto end;
			}

		i=X509_REQ_verify(req,pkey);
		if (tmp) {
			EVP_PKEY_free(pkey);
			pkey=NULL;
		}

		if (i < 0)
			{
			goto end;
			}
		else if (i == 0)
			{
			BIO_printf(bio_err,"verify failure\n");
			ERR_print_errors(bio_err);
			}
		else /* if (i > 0) */
			BIO_printf(bio_err,"verify OK\n");
		}

	if (noout && !text && !modulus && !subject && !pubkey)
		{
		ex=0;
		goto end;
		}

	if (outfile == NULL)
		{
		BIO_set_fp(out,stdout,BIO_NOCLOSE);
#ifdef OPENSSL_SYS_VMS
		{
		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
		out = BIO_push(tmpbio, out);
		}
#endif
		}
	else
		{
		if ((keyout != NULL) && (strcmp(outfile,keyout) == 0))
			i=(int)BIO_append_filename(out,outfile);
		else
			i=(int)BIO_write_filename(out,outfile);
		if (!i)
			{
			perror(outfile);
			goto end;
			}
		}

	if (pubkey)
		{
		EVP_PKEY *tpubkey; 
		tpubkey=X509_REQ_get_pubkey(req);
		if (tpubkey == NULL)
			{
			BIO_printf(bio_err,"Error getting public key\n");
			ERR_print_errors(bio_err);
			goto end;
			}
		PEM_write_bio_PUBKEY(out, tpubkey);
		EVP_PKEY_free(tpubkey);
		}

	if (text)
		{
		if (x509)
			X509_print_ex(out, x509ss, nmflag, reqflag);
		else	
			X509_REQ_print_ex(out, req, nmflag, reqflag);
		}

	if(subject) 
		{
		if(x509)
			print_name(out, "subject=", X509_get_subject_name(x509ss), nmflag);
		else
			print_name(out, "subject=", X509_REQ_get_subject_name(req), nmflag);
		}

	if (modulus)
		{
		EVP_PKEY *tpubkey;

		if (x509)
			tpubkey=X509_get_pubkey(x509ss);
		else
			tpubkey=X509_REQ_get_pubkey(req);
		if (tpubkey == NULL)
			{
			fprintf(stdout,"Modulus=unavailable\n");
			goto end; 
			}