pkcs12.c

pkcs12格式文件的编解码软件

	CRYPTO_push_info("building chain");
#endif

	/* If chaining get chain from user cert */
	if (chain) {
        	int vret;
		STACK_OF(X509) *chain2;
		X509_STORE *store = X509_STORE_new();
		if (!store)
			{
			BIO_printf (bio_err, "Memory allocation error\n");
			goto export_end;
			}
		if (!X509_STORE_load_locations(store, CAfile, CApath))
			X509_STORE_set_default_paths (store);

		vret = get_cert_chain (ucert, store, &chain2);
		X509_STORE_free(store);

		if (!vret) {
		    /* Exclude verified certificate */
		    for (i = 1; i < sk_X509_num (chain2) ; i++) 
			sk_X509_push(certs, sk_X509_value (chain2, i));
		    /* Free first certificate */
		    X509_free(sk_X509_value(chain2, 0));
		    sk_X509_free(chain2);
		} else {
			BIO_printf (bio_err, "Error %s getting chain.\n",
					X509_verify_cert_error_string(vret));
			goto export_end;
		}			
    	}

#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
	CRYPTO_push_info("building bags");
#endif

	/* We now have loads of certificates: include them all */
	for(i = 0; i < sk_X509_num(certs); i++) {
		X509 *cert = NULL;
		cert = sk_X509_value(certs, i);
		bag = M_PKCS12_x5092certbag(cert);
		/* If it matches private key set id */
		if(cert == ucert) {
			if(name) PKCS12_add_friendlyname(bag, name, -1);
			PKCS12_add_localkeyid(bag, keyid, keyidlen);
		} else if((catmp = sk_shift(canames))) 
				PKCS12_add_friendlyname(bag, catmp, -1);
		sk_PKCS12_SAFEBAG_push(bags, bag);
	}
	sk_X509_pop_free(certs, X509_free);
	certs = NULL;

#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
	CRYPTO_push_info("encrypting bags");
#endif

	if(!noprompt &&
		EVP_read_pw_string(pass, 50, "Enter Export Password:", 1)) {
	    BIO_printf (bio_err, "Can't read Password\n");
	    goto export_end;
        }
	if (!twopass) strcpy(macpass, pass);
	/* Turn certbags into encrypted authsafe */
	authsafe = PKCS12_pack_p7encdata(cert_pbe, cpass, -1, NULL, 0,
								 iter, bags);
	sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
	bags = NULL;

	if (!authsafe) {
		ERR_print_errors (bio_err);
		goto export_end;
	}

	safes = sk_PKCS7_new_null ();
	sk_PKCS7_push (safes, authsafe);

#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
	CRYPTO_push_info("building shrouded key bag");
#endif

	/* Make a shrouded key bag */
	p8 = EVP_PKEY2PKCS8 (key);
	if(keytype) PKCS8_add_keyusage(p8, keytype);
	bag = PKCS12_MAKE_SHKEYBAG(key_pbe, cpass, -1, NULL, 0, iter, p8);
	PKCS8_PRIV_KEY_INFO_free(p8);
	p8 = NULL;
        if (name) PKCS12_add_friendlyname (bag, name, -1);
	PKCS12_add_localkeyid (bag, keyid, keyidlen);
	bags = sk_PKCS12_SAFEBAG_new_null();
	sk_PKCS12_SAFEBAG_push (bags, bag);

#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
	CRYPTO_push_info("encrypting shrouded key bag");
#endif

	/* Turn it into unencrypted safe bag */
	authsafe = PKCS12_pack_p7data (bags);
	sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
	bags = NULL;
	sk_PKCS7_push (safes, authsafe);

#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
	CRYPTO_push_info("building pkcs12");
#endif

	p12 = PKCS12_init (NID_pkcs7_data);

	M_PKCS12_pack_authsafes (p12, safes);

	sk_PKCS7_pop_free(safes, PKCS7_free);
	safes = NULL;

	PKCS12_set_mac (p12, mpass, -1, NULL, 0, maciter, NULL);

#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
	CRYPTO_push_info("writing pkcs12");
#endif

	i2d_PKCS12_bio (out, p12);

	ret = 0;

    export_end:
#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
	CRYPTO_pop_info();
	CRYPTO_push_info("process -export_cert: freeing");
#endif

	if (key) EVP_PKEY_free(key);
	if (certs) sk_X509_pop_free(certs, X509_free);
	if (safes) sk_PKCS7_pop_free(safes, PKCS7_free);
	if (bags) sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);

#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
#endif
	goto end;
	
    }

    if (!(p12 = d2i_PKCS12_bio (in, NULL))) {
	ERR_print_errors(bio_err);
	goto end;
    }

#ifdef CRYPTO_MDEBUG
    CRYPTO_push_info("read import password");
#endif
    if(!noprompt && EVP_read_pw_string(pass, 50, "Enter Import Password:", 0)) {
	BIO_printf (bio_err, "Can't read Password\n");
	goto end;
    }
#ifdef CRYPTO_MDEBUG
    CRYPTO_pop_info();
#endif

    if (!twopass) strcpy(macpass, pass);

    if (options & INFO) BIO_printf (bio_err, "MAC Iteration %ld\n", p12->mac->iter ? ASN1_INTEGER_get (p12->mac->iter) : 1);
    if(macver) {
#ifdef CRYPTO_MDEBUG
    CRYPTO_push_info("verify MAC");
#endif
	/* If we enter empty password try no password first */
	if(!macpass[0] && PKCS12_verify_mac(p12, NULL, 0)) {
		/* If mac and crypto pass the same set it to NULL too */
		if(!twopass) cpass = NULL;
	} else if (!PKCS12_verify_mac(p12, mpass, -1)) {
	    BIO_printf (bio_err, "Mac verify error: invalid password?\n");
	    ERR_print_errors (bio_err);
	    goto end;
	}
	BIO_printf (bio_err, "MAC verified OK\n");
#ifdef CRYPTO_MDEBUG
    CRYPTO_pop_info();
#endif
    }

#ifdef CRYPTO_MDEBUG
    CRYPTO_push_info("output keys and certificates");
#endif
    if (!dump_certs_keys_p12 (out, p12, cpass, -1, options, passout)) {
	BIO_printf(bio_err, "Error outputting keys and certificates\n");
	ERR_print_errors (bio_err);
	goto end;
    }
#ifdef CRYPTO_MDEBUG
    CRYPTO_pop_info();
#endif
    ret = 0;
 end:
    if (p12) PKCS12_free(p12);
    if(export_cert || inrand) app_RAND_write_file(NULL, bio_err);
#ifdef CRYPTO_MDEBUG
    CRYPTO_remove_all_info();
#endif
    BIO_free(in);
    BIO_free_all(out);
    if (canames) sk_free(canames);
    if(passin) OPENSSL_free(passin);
    if(passout) OPENSSL_free(passout);
    OPENSSL_EXIT(ret);
}

int dump_certs_keys_p12 (BIO *out, PKCS12 *p12, char *pass,
	     int passlen, int options, char *pempass)
{
	STACK_OF(PKCS7) *asafes;
	STACK_OF(PKCS12_SAFEBAG) *bags;
	int i, bagnid;
	PKCS7 *p7;

	if (!( asafes = M_PKCS12_unpack_authsafes (p12))) return 0;
	for (i = 0; i < sk_PKCS7_num (asafes); i++) {
		p7 = sk_PKCS7_value (asafes, i);
		bagnid = OBJ_obj2nid (p7->type);
		if (bagnid == NID_pkcs7_data) {
			bags = M_PKCS12_unpack_p7data (p7);
			if (options & INFO) BIO_printf (bio_err, "PKCS7 Data\n");
		} else if (bagnid == NID_pkcs7_encrypted) {
			if (options & INFO) {
				BIO_printf (bio_err, "PKCS7 Encrypted data: ");
				alg_print (bio_err, 
					p7->d.encrypted->enc_data->algorithm);
			}
			bags = M_PKCS12_unpack_p7encdata (p7, pass, passlen);
		} else continue;
		if (!bags) return 0;
	    	if (!dump_certs_pkeys_bags (out, bags, pass, passlen, 
						 options, pempass)) {
			sk_PKCS12_SAFEBAG_pop_free (bags, PKCS12_SAFEBAG_free);
			return 0;
		}
		sk_PKCS12_SAFEBAG_pop_free (bags, PKCS12_SAFEBAG_free);
	}
	sk_PKCS7_pop_free (asafes, PKCS7_free);
	return 1;
}

int dump_certs_pkeys_bags (BIO *out, STACK_OF(PKCS12_SAFEBAG) *bags,
			   char *pass, int passlen, int options, char *pempass)
{
	int i;
	for (i = 0; i < sk_PKCS12_SAFEBAG_num (bags); i++) {
		if (!dump_certs_pkeys_bag (out,
					   sk_PKCS12_SAFEBAG_value (bags, i),
					   pass, passlen,
					   options, pempass))
		    return 0;
	}
	return 1;
}

int dump_certs_pkeys_bag (BIO *out, PKCS12_SAFEBAG *bag, char *pass,
	     int passlen, int options, char *pempass)
{
	EVP_PKEY *pkey;
	PKCS8_PRIV_KEY_INFO *p8;
	X509 *x509;
	
	switch (M_PKCS12_bag_type(bag))
	{
	case NID_keyBag:
		if (options & INFO) BIO_printf (bio_err, "Key bag\n");
		if (options & NOKEYS) return 1;
		print_attribs (out, bag->attrib, "Bag Attributes");
		p8 = bag->value.keybag;
		if (!(pkey = EVP_PKCS82PKEY (p8))) return 0;
		print_attribs (out, p8->attributes, "Key Attributes");
		PEM_write_bio_PrivateKey (out, pkey, enc, NULL, 0, NULL, pempass);
		EVP_PKEY_free(pkey);
	break;

	case NID_pkcs8ShroudedKeyBag:
		if (options & INFO) {
			BIO_printf (bio_err, "Shrouded Keybag: ");
			alg_print (bio_err, bag->value.shkeybag->algor);
		}
		if (options & NOKEYS) return 1;
		print_attribs (out, bag->attrib, "Bag Attributes");
		if (!(p8 = M_PKCS12_decrypt_skey (bag, pass, passlen)))
				return 0;
		if (!(pkey = EVP_PKCS82PKEY (p8))) {
			PKCS8_PRIV_KEY_INFO_free(p8);
			return 0;
		}
		print_attribs (out, p8->attributes, "Key Attributes");
		PKCS8_PRIV_KEY_INFO_free(p8);
		PEM_write_bio_PrivateKey (out, pkey, enc, NULL, 0, NULL, pempass);
		EVP_PKEY_free(pkey);
	break;

	case NID_certBag:
		if (options & INFO) BIO_printf (bio_err, "Certificate bag\n");
		if (options & NOCERTS) return 1;
                if (PKCS12_get_attr(bag, NID_localKeyID)) {
			if (options & CACERTS) return 1;
		} else if (options & CLCERTS) return 1;
		print_attribs (out, bag->attrib, "Bag Attributes");
		if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate )
								 return 1;
		if (!(x509 = M_PKCS12_certbag2x509(bag))) return 0;
		dump_cert_text (out, x509);
		PEM_write_bio_X509 (out, x509);
		X509_free(x509);
	break;

	case NID_safeContentsBag:
		if (options & INFO) BIO_printf (bio_err, "Safe Contents bag\n");
		print_attribs (out, bag->attrib, "Bag Attributes");
		return dump_certs_pkeys_bags (out, bag->value.safes, pass,
							    passlen, options, pempass);
					
	default:
		BIO_printf (bio_err, "Warning unsupported bag type: ");
		i2a_ASN1_OBJECT (bio_err, bag->type);
		BIO_printf (bio_err, "\n");
		return 1;
	break;
	}
	return 1;
}

/* Given a single certificate return a verified chain or NULL if error */

/* Hope this is OK .... */

int get_cert_chain (X509 *cert, X509_STORE *store, STACK_OF(X509) **chain)
{
	X509_STORE_CTX store_ctx;
	STACK_OF(X509) *chn;
	int i;

	X509_STORE_CTX_init(&store_ctx, store, cert, NULL);
	if (X509_verify_cert(&store_ctx) <= 0) {
		i = X509_STORE_CTX_get_error (&store_ctx);
		goto err;
	}
	chn =  X509_STORE_CTX_get1_chain(&store_ctx);
	i = 0;
	*chain = chn;
err:
	X509_STORE_CTX_cleanup(&store_ctx);
	
	return i;
}	

int alg_print (BIO *x, X509_ALGOR *alg)
{
	PBEPARAM *pbe;
	unsigned char *p;
	p = alg->parameter->value.sequence->data;
	pbe = d2i_PBEPARAM (NULL, &p, alg->parameter->value.sequence->length);
	BIO_printf (bio_err, "%s, Iteration %d\n", 
	OBJ_nid2ln(OBJ_obj2nid(alg->algorithm)), ASN1_INTEGER_get(pbe->iter));
	PBEPARAM_free (pbe);
	return 0;
}

/* Load all certificates from a given file */

int cert_load(BIO *in, STACK_OF(X509) *sk)
{
	int ret;
	X509 *cert;
	ret = 0;
#ifdef CRYPTO_MDEBUG
	CRYPTO_push_info("cert_load(): reading one cert");
#endif
	while((cert = PEM_read_bio_X509(in, NULL, NULL, NULL))) {
#ifdef CRYPTO_MDEBUG
		CRYPTO_pop_info();
#endif
		ret = 1;
		sk_X509_push(sk, cert);
#ifdef CRYPTO_MDEBUG
		CRYPTO_push_info("cert_load(): reading one cert");
#endif
	}
#ifdef CRYPTO_MDEBUG
	CRYPTO_pop_info();
#endif
	if(ret) ERR_clear_error();
	return ret;
}

/* Generalised attribute print: handle PKCS#8 and bag attributes */

int print_attribs (BIO *out, STACK_OF(X509_ATTRIBUTE) *attrlst, char *name)
{
	X509_ATTRIBUTE *attr;
	ASN1_TYPE *av;
	char *value;
	int i, attr_nid;
	if(!attrlst) {
		BIO_printf(out, "%s: <No Attributes>\n", name);
		return 1;
	}
	if(!sk_X509_ATTRIBUTE_num(attrlst)) {
		BIO_printf(out, "%s: <Empty Attributes>\n", name);
		return 1;
	}
	BIO_printf(out, "%s\n", name);
	for(i = 0; i < sk_X509_ATTRIBUTE_num(attrlst); i++) {
		attr = sk_X509_ATTRIBUTE_value(attrlst, i);
		attr_nid = OBJ_obj2nid(attr->object);
		BIO_printf(out, "    ");
		if(attr_nid == NID_undef) {
			i2a_ASN1_OBJECT (out, attr->object);
			BIO_printf(out, ": ");
		} else BIO_printf(out, "%s: ", OBJ_nid2ln(attr_nid));

		if(sk_ASN1_TYPE_num(attr->value.set)) {
			av = sk_ASN1_TYPE_value(attr->value.set, 0);
			switch(av->type) {
				case V_ASN1_BMPSTRING:
        			value = uni2asc(av->value.bmpstring->data,
                                	       av->value.bmpstring->length);
				BIO_printf(out, "%s\n", value);
				OPENSSL_free(value);
				break;

				case V_ASN1_OCTET_STRING:
				hex_prin(out, av->value.octet_string->data,
					av->value.octet_string->length);
				BIO_printf(out, "\n");	
				break;

				case V_ASN1_BIT_STRING:
				hex_prin(out, av->value.bit_string->data,
					av->value.bit_string->length);
				BIO_printf(out, "\n");	
				break;

				default:
					BIO_printf(out, "<Unsupported tag %d>\n", av->type);
				break;
			}
		} else BIO_printf(out, "<No Values>\n");
	}
	return 1;
}

void hex_prin(BIO *out, unsigned char *buf, int len)
{
	int i;
	for (i = 0; i < len; i++) BIO_printf (out, "%02X ", buf[i]);
}

#endif