/* * hal_internal.h * -------------- * Internal API declarations for libhal. * * Authors: Rob Austein, Paul Selkirk * Copyright (c) 2015, NORDUnet A/S All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of the NORDUnet nor the names of its contributors may * be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _HAL_INTERNAL_H_ #define _HAL_INTERNAL_H_ #include #include "hal.h" #include "verilog_constants.h" /* * Everything in this file is part of the internal API, that is, * subject to change without notice. Nothing outside of libhal itself * should be looking at this file. */ /* * htonl is not available in arm-none-eabi headers or libc. */ #ifndef STM32F4XX #include #else #ifdef __ARMEL__ /* little endian */ inline uint32_t htonl(uint32_t w) { return ((w & 0x000000ff) << 24) + ((w & 0x0000ff00) << 8) + ((w & 0x00ff0000) >> 8) + ((w & 0xff000000) >> 24); } #else /* big endian */ #define htonl(x) (x) #endif #define ntohl htonl #endif /* * Low-level I/O convenience functions, moved here from hal.h * because they use symbols defined in verilog_constants.h. */ static inline hal_error_t hal_io_zero(const hal_core_t *core) { const uint8_t buf[4] = { 0, 0, 0, 0 }; return hal_io_write(core, ADDR_CTRL, buf, sizeof(buf)); } static inline hal_error_t hal_io_init(const hal_core_t *core) { const uint8_t buf[4] = { 0, 0, 0, CTRL_INIT }; return hal_io_write(core, ADDR_CTRL, buf, sizeof(buf)); } static inline hal_error_t hal_io_next(const hal_core_t *core) { const uint8_t buf[4] = { 0, 0, 0, CTRL_NEXT }; return hal_io_write(core, ADDR_CTRL, buf, sizeof(buf)); } static inline hal_error_t hal_io_wait_ready(const hal_core_t *core) { int limit = -1; return hal_io_wait(core, STATUS_READY, &limit); } static inline hal_error_t hal_io_wait_valid(const hal_core_t *core) { int limit = -1; return hal_io_wait(core, STATUS_VALID, &limit); } static inline hal_error_t hal_io_wait_ready2(const hal_core_t *core1, const hal_core_t *core2) { int limit = -1; return hal_io_wait2(core1, core2, STATUS_READY, &limit); } static inline hal_error_t hal_io_wait_valid2(const hal_core_t *core1, const hal_core_t *core2) { int limit = -1; return hal_io_wait2(core1, core2, STATUS_VALID, &limit); } /* * Static memory allocation on start-up. Don't use this except where * really necessary. By design, there's no way to free this, we don't * want to have to manage a heap. Intent is just to allow allocation * things like the large-ish ks_index arrays used by ks_flash.c from a * memory source external to the executable image file (eg, from the * secondary SDRAM chip on the Cryptech Alpha board). * * We shouldn't need this except on the HSM, so for now we don't bother * with implementing a version of this based on malloc() or sbrk(). */ extern void *hal_allocate_static_memory(const size_t size); /* * Longest hash block and digest we support at the moment. */ #define HAL_MAX_HASH_BLOCK_LENGTH SHA512_BLOCK_LEN #define HAL_MAX_HASH_DIGEST_LENGTH SHA512_DIGEST_LEN /* * Locks and critical sections. */ extern void hal_critical_section_start(void); extern void hal_critical_section_end(void); extern void hal_ks_lock(void); extern void hal_ks_unlock(void); extern void hal_task_yield(void); /* * Thread sleep. Currently used only for bad-PIN delays. */ extern void hal_sleep(const unsigned seconds); /* * Logging. */ typedef enum { HAL_LOG_DEBUG, HAL_LOG_INFO, HAL_LOG_WARN, HAL_LOG_ERROR, HAL_LOG_SILENT } hal_log_level_t; extern void hal_log_set_level(const hal_log_level_t level); extern void hal_log(const hal_log_level_t level, const char *format, ...); /* * Dispatch structures for RPC implementation. * * The breakdown of which functions go into which dispatch vectors is * based entirely on pesky details like making sure that the right * functions get linked in the right cases, and should not be * construed as making any particular sense in any larger context. * * In theory eventually we might want a fully general mechanism to * allow us to dispatch arbitrary groups of functions either locally * or remotely on a per-user basis. In practice, we probably want to * run everything on the HSM except for hashing and digesting, so just * code for that case initially while leaving the design open for a * more general mechanism later if warranted. * * So we have three cases: * * - We're the HSM, so we do everything locally (ie, we run the RPC * server functions. * * - We're the host, so we do everything remotely (ie, we do * everything using the client-side RPC calls. * * - We're the host but are doing hashing locally, so we do a mix. * This is slightly more complicated than it might at first appear, * because we must handle the case of one of the pkey functions * taking a hash context instead of a literal hash value, in which * case we have to extract the hash value from the context and * supply it to the pkey RPC client code as a literal value. * * ...Except that for PKCS #11 we also have to handle the case of * "session keys", ie, keys which are not stored on the HSM. * Apparently people really do use these, mostly for public keys, in * order to conserve expensive memory on the HSM. So this is another * feature of mixed mode: keys with HAL_KEY_FLAG_PROXIMATE set live on * the host, not in the HSM, and the mixed-mode pkey handlers deal * with the routing. In the other two modes we ignore the flag and * send everything where we were going to send it anyway. Restricting * the fancy key handling to mixed mode lets us drop this complexity * out entirely for applications which have no use for it. */ typedef struct { hal_error_t (*set_pin)(const hal_client_handle_t client, const hal_user_t user, const char * const newpin, const size_t newpin_len); hal_error_t (*login)(const hal_client_handle_t client, const hal_user_t user, const char * const newpin, const size_t newpin_len); hal_error_t (*logout)(const hal_client_handle_t client); hal_error_t (*logout_all)(void); hal_error_t (*is_logged_in)(const hal_client_handle_t client, const hal_user_t user); hal_error_t (*get_random)(void *buffer, const size_t length); hal_error_t (*get_version)(uint32_t *version); } hal_rpc_misc_dispatch_t; typedef struct { hal_error_t (*get_digest_length)(const hal_digest_algorithm_t alg, size_t *length); hal_error_t (*get_digest_algorithm_id)(const hal_digest_algorithm_t alg, uint8_t *id, size_t *len, const size_t len_max); hal_error_t (*get_algorithm)(const hal_hash_handle_t hash, hal_digest_algorithm_t *alg); hal_error_t (*initialize)(const hal_client_handle_t client, const hal_session_handle_t session, hal_hash_handle_t *hash, const hal_digest_algorithm_t alg, const uint8_t * const key, const size_t key_length); hal_error_t (*update)(const hal_hash_handle_t hash, const uint8_t * data, const size_t length); hal_error_t (*finalize)(const hal_hash_handle_t hash, uint8_t *digest, const size_t length); } hal_rpc_hash_dispatch_t; typedef struct { hal_error_t (*load)(const hal_client_handle_t client, const hal_session_handle_t session, hal_pkey_handle_t *pkey, hal_uuid_t *name, const uint8_t * const der, const size_t der_len, const hal_key_flags_t flags); hal_error_t (*open)(const hal_client_handle_t client, const hal_session_handle_t session, hal_pkey_handle_t *pkey, const hal_uuid_t * const name); hal_error_t (*generate_rsa)(const hal_client_handle_t client, const hal_session_handle_t session, hal_pkey_handle_t *pkey, hal_uuid_t *name, const unsigned key_length, const uint8_t * const public_exponent, const size_t public_exponent_len, const hal_key_flags_t flags); hal_error_t (*generate_ec)(const hal_client_handle_t client, const hal_session_handle_t session, hal_pkey_handle_t *pkey, hal_uuid_t *name, const hal_curve_name_t curve, const hal_key_flags_t flags); hal_error_t (*close)(const hal_pkey_handle_t pkey); hal_error_t (*delete)(const hal_pkey_handle_t pkey); hal_error_t (*get_key_type)(const hal_pkey_handle_t pkey, hal_key_type_t *type); hal_error_t (*get_key_curve)(const hal_pkey_handle_t pkey, hal_curve_name_t *curve); hal_error_t (*get_key_flags)(const hal_pkey_handle_t pkey, hal_key_flags_t *flags); size_t (*get_public_key_len)(const hal_pkey_handle_t pkey); hal_error_t (*get_public_key)(const hal_pkey_handle_t pkey, uint8_t *der, size_t *der_len, const size_t der_max); hal_error_t (*sign)(const hal_pkey_handle_t pkey, const hal_hash_handle_t hash, const uint8_t * const input, const size_t input_len, uint8_t * signature, size_t *signature_len, const size_t signature_max); hal_error_t (*verify)(const hal_pkey_handle_t pkey, const hal_hash_handle_t hash, const uint8_t * const input, const size_t input_len, const uint8_t * const signature, const size_t signature_len); hal_error_t (*match)(const hal_client_handle_t client, const hal_session_handle_t session, const hal_key_type_t type, const hal_curve_name_t curve, const hal_key_flags_t mask, const hal_key_flags_t flags, const hal_pkey_attribute_t *attributes, const unsigned attributes_len, unsigned *state, hal_uuid_t *result, unsigned *result_len, const unsigned result_max, const hal_uuid_t * const previous_uuid); hal_error_t (*set_attributes)(const hal_pkey_handle_t pkey, const hal_pkey_attribute_t *attributes, const unsigned attributes_len); hal_error_t (*get_attributes)(const hal_pkey_handle_t pkey, hal_pkey_attribute_t *attributes, const unsigned attributes_len, uint8_t *attributes_buffer, const size_t attributes_buffer_len); hal_error_t (*export)(const hal_pkey_handle_t pkey_handle, const hal_pkey_handle_t kekek_handle, uint8_t *pkcs8, size_t *pkcs8_len, const size_t pkcs8_max, uint8_t *kek, size_t *kek_len, const size_t kek_max); hal_error_t (*import)(const hal_client_handle_t client, const hal_session_handle_t session, hal_pkey_handle_t *pkey, hal_uuid_t *name, const hal_pkey_handle_t kekek_handle, const uint8_t * const pkcs8, const size_t pkcs8_len, const uint8_t * const kek, const size_t kek_len, const hal_key_flags_t flags); } hal_rpc_pkey_dispatch_t; extern const hal_rpc_misc_dispatch_t hal_rpc_local_misc_dispatch, hal_rpc_remote_misc_dispatch, *hal_rpc_misc_dispatch; extern const hal_rpc_hash_dispatch_t hal_rpc_local_hash_dispatch, hal_rpc_remote_hash_dispatch, *hal_rpc_hash_dispatch; extern const hal_rpc_pkey_dispatch_t hal_rpc_local_pkey_dispatch, hal_rpc_remote_pkey_dispatch, hal_rpc_mixed_pkey_dispatch, *hal_rpc_pkey_dispatch; /* * See code in rpc_pkey.c for how this flag fits into the pkey handle. */ #define HAL_PKEY_HANDLE_TOKEN_FLAG (1 << 31) /* * Mostly used by the local_pkey code, but the mixed_pkey code needs * it to pad hashes for RSA PKCS #1.5 signatures. This may indicate * that we need a slightly more general internal API here, but not * worth worrying about as long as we can treat RSA as a special case * and just pass the plain hash for everything else. */ extern hal_error_t hal_rpc_pkcs1_construct_digestinfo(const hal_hash_handle_t handle, uint8_t *digest_info, size_t *digest_info_len, const size_t digest_info_max); /* * CRC-32 stuff (for flash keystore, etc). Dunno if we want a Verilog * implementation of this, or if it would even be faster than doing it * the main CPU taking I/O overhead and so forth into account. * * These prototypes were generated by pycrc.py, see notes in crc32.c. */ typedef uint32_t hal_crc32_t; static inline hal_crc32_t hal_crc32_init(void) { return 0xffffffff; } extern hal_crc32_t hal_crc32_update(hal_crc32_t crc, const void *data, size_t data_len); static inline hal_crc32_t hal_crc32_finalize(hal_crc32_t crc) { return crc ^ 0xffffffff; } /* * Sizes for PKCS #8 encoded private keys. This may not be exact due * to ASN.1 INTEGER encoding rules, but should be good enough for * buffer sizing. * * 2048-bit RSA: 1219 bytes * 4096-bit RSA: 2373 bytes * 8192-bit RSA: 4679 bytes * EC P-256: 138 bytes * EC P-384: 185 bytes * EC P-521: 240 bytes * * Plus we need a bit of AES-keywrap overhead, since we're storing the * wrapped form (see hal_aes_keywrap_cyphertext_length()). * * A buffer big enough for a 8192-bit RSA key would overflow one * sub-sector on the flash chip we're using on the Alpha. We could * invent some more complex scheme where key blocks are allowed to * span multiple sub-sectors, but since an 8192-bit RSA key would also * be unusably slow with the current RSA implementation, for the * moment we take the easy way out and cap this at 4096-bit RSA. */ #if 0 #define HAL_KS_WRAPPED_KEYSIZE ((2373 + 15) & ~7) #else #warning Temporary test hack to HAL_KS_WRAPPED_KEYSIZE, clean this up // // See how much of the problem we're having with pkey support for the // new modexpa7 components is just this buffer size being too small. // #define HAL_KS_WRAPPED_KEYSIZE ((2373 + 6 * 4096 / 8 + 6 * 4 + 15) & ~7) #if HAL_KS_WRAPPED_KEYSIZE + 8 > 4096 #warning HAL_KS_WRAPPED_KEYSIZE is too big for a single 4096-octet block #endif #endif /* * PINs. * * The functions here might want renaming, eg, to hal_pin_*(). */ #ifndef HAL_PIN_SALT_LENGTH #define HAL_PIN_SALT_LENGTH 16 #endif typedef struct { uint32_t iterations; uint8_t pin[HAL_MAX_HASH_DIGEST_LENGTH]; uint8_t salt[HAL_PIN_SALT_LENGTH]; } hal_ks_pin_t; extern hal_error_t hal_set_pin_default_iterations(const hal_client_handle_t client, const uint32_t iterations); extern hal_error_t hal_get_pin(const hal_user_t user, const hal_ks_pin_t **pin); extern hal_error_t hal_set_pin(const hal_user_t user, const hal_ks_pin_t * const pin); /* * Master key memory (MKM) and key-encryption-key (KEK). * * Providing a mechanism for storing the KEK in flash is a horrible * kludge which defeats the entire purpose of having the MKM. We * support it for now because the Alpha hardware does not yet have * a working battery backup for the MKM, but it should go away RSN. */ #ifndef HAL_MKM_FLASH_BACKUP_KLUDGE #define HAL_MKM_FLASH_BACKUP_KLUDGE 1 #endif #ifndef KEK_LENGTH #define KEK_LENGTH (bitsToBytes(256)) #endif extern hal_error_t hal_mkm_get_kek(uint8_t *kek, size_t *kek_len, const size_t kek_max); extern hal_error_t hal_mkm_volatile_read(uint8_t *buf, const size_t len); extern hal_error_t hal_mkm_volatile_write(const uint8_t * const buf, const size_t len); extern hal_error_t hal_mkm_volatile_erase(const size_t len); #if HAL_MKM_FLASH_BACKUP_KLUDGE /* #warning MKM flash backup kludge enabled. Do NOT use this in production! */ extern hal_error_t hal_mkm_flash_read(uint8_t *buf, const size_t len); extern hal_error_t hal_mkm_flash_read_no_lock(uint8_t *buf, const size_t len); extern hal_error_t hal_mkm_flash_write(const uint8_t * const buf, const size_t len); extern hal_error_t hal_mkm_flash_erase(const size_t len); #endif /* * Clean up pkey stuff that's tied to a particular client on logout. */ extern hal_error_t hal_pkey_logout(const hal_client_handle_t client); /* * Keystore API for use by the pkey implementation. * * In an attempt to emulate what current theory says will eventually * be the behavior of the underlying Cryptech Verilog "hardware", * these functions automatically apply the AES keywrap transformations. * * Unclear whether these should also call the ASN.1 encode/decode * functions. For the moment, the answer is no, but we may need to * revisit this as the underlying Verilog API evolves. * * hal_pkey_slot_t is defined here too, so that keystore drivers can * piggyback on the pkey database for storage related to keys on which * the user currently has an active pkey handle. Nothing outside the * pkey and keystore code should touch this. */ typedef struct { hal_client_handle_t client; hal_session_handle_t session; hal_pkey_handle_t pkey; hal_key_type_t type; hal_curve_name_t curve; hal_key_flags_t flags; hal_uuid_t name; int hint; /* * This might be where we'd stash a (hal_core_t *) pointing to a * core which has already been loaded with the key, if we were * trying to be clever about using multiple signing cores. Moot * point (ie, no way we could possibly test such a thing) as long as * the FPGA is too small to hold more than one modexp core and ECDSA * is entirely software, so skip it for now, but the implied * semantics are interesting: a pkey handle starts to resemble an * initialized signing core, and once all the cores are in use, one * can't load another key without closing an existing pkey handle. */ } hal_pkey_slot_t; /* * Keystore is an opaque type, we just pass pointers. */ typedef struct hal_ks hal_ks_t; extern hal_ks_t * const hal_ks_token; extern hal_ks_t * const hal_ks_volatile; extern hal_error_t hal_ks_init(hal_ks_t *ks, const int alloc); extern void hal_ks_init_read_only_pins_only(void); extern hal_error_t hal_ks_store(hal_ks_t *ks, hal_pkey_slot_t *slot, const uint8_t * const der, const size_t der_len); extern hal_error_t hal_ks_fetch(hal_ks_t *ks, hal_pkey_slot_t *slot, uint8_t *der, size_t *der_len, const size_t der_max); extern hal_error_t hal_ks_delete(hal_ks_t *ks, hal_pkey_slot_t *slot); extern hal_error_t hal_ks_match(hal_ks_t *ks, const hal_client_handle_t client, const hal_session_handle_t session, const hal_key_type_t type, const hal_curve_name_t curve, const hal_key_flags_t mask, const hal_key_flags_t flags, const hal_pkey_attribute_t *attributes, const unsigned attributes_len, hal_uuid_t *result, unsigned *result_len, const unsigned result_max, const hal_uuid_t * const previous_uuid); extern hal_error_t hal_ks_set_attributes(hal_ks_t *ks, hal_pkey_slot_t *slot, const hal_pkey_attribute_t *attributes, const unsigned attributes_len); extern hal_error_t hal_ks_get_attributes(hal_ks_t *ks, hal_pkey_slot_t *slot, hal_pkey_attribute_t *attributes, const unsigned attributes_len, uint8_t *attributes_buffer, const size_t attributes_buffer_len); extern hal_error_t hal_ks_logout(hal_ks_t *ks, const hal_client_handle_t client); extern hal_error_t hal_ks_rewrite_der(hal_ks_t *ks, hal_pkey_slot_t *slot, const uint8_t * const der, const size_t der_len); /* * RPC lowest-level send and receive routines. These are blocking, and * transport-specific (sockets, USB). */ extern hal_error_t hal_rpc_send(const uint8_t * const buf, const size_t len); extern hal_error_t hal_rpc_recv(uint8_t * const buf, size_t * const len); extern hal_error_t hal_rpc_sendto(const uint8_t * const buf, const size_t len, void *opaque); extern hal_error_t hal_rpc_recvfrom(uint8_t * const buf, size_t * const len, void **opaque); extern hal_error_t hal_rpc_client_transport_init(void); extern hal_error_t hal_rpc_client_transport_close(void); extern hal_error_t hal_rpc_server_transport_init(void); extern hal_error_t hal_rpc_server_transport_close(void); /* * RPC function numbers */ typedef enum { RPC_FUNC_GET_VERSION, RPC_FUNC_GET_RANDOM, RPC_FUNC_SET_PIN, RPC_FUNC_LOGIN, RPC_FUNC_LOGOUT, RPC_FUNC_LOGOUT_ALL, RPC_FUNC_IS_LOGGED_IN, RPC_FUNC_HASH_GET_DIGEST_LEN, RPC_FUNC_HASH_GET_DIGEST_ALGORITHM_ID, RPC_FUNC_HASH_GET_ALGORITHM, RPC_FUNC_HASH_INITIALIZE, RPC_FUNC_HASH_UPDATE, RPC_FUNC_HASH_FINALIZE, RPC_FUNC_PKEY_LOAD, RPC_FUNC_PKEY_OPEN, RPC_FUNC_PKEY_GENERATE_RSA, RPC_FUNC_PKEY_GENERATE_EC, RPC_FUNC_PKEY_CLOSE, RPC_FUNC_PKEY_DELETE, RPC_FUNC_PKEY_GET_KEY_TYPE, RPC_FUNC_PKEY_GET_KEY_FLAGS, RPC_FUNC_PKEY_GET_PUBLIC_KEY_LEN, RPC_FUNC_PKEY_GET_PUBLIC_KEY, RPC_FUNC_PKEY_SIGN, RPC_FUNC_PKEY_VERIFY, RPC_FUNC_PKEY_MATCH, RPC_FUNC_PKEY_GET_KEY_CURVE, RPC_FUNC_PKEY_SET_ATTRIBUTES, RPC_FUNC_PKEY_GET_ATTRIBUTES, RPC_FUNC_PKEY_EXPORT, RPC_FUNC_PKEY_IMPORT, } rpc_func_num_t; #define RPC_VERSION 0x01010000 /* 1.1.0.0 */ /* * RPC client locality. These have to be defines rather than an enum, * because they're handled by the preprocessor. */ #define RPC_CLIENT_LOCAL 0 #define RPC_CLIENT_REMOTE 1 #define RPC_CLIENT_MIXED 2 #define RPC_CLIENT_NONE 3 /* * Maximum size of a HAL RPC packet. */ #ifndef HAL_RPC_MAX_PKT_SIZE #define HAL_RPC_MAX_PKT_SIZE 4096 #endif /* * Location of AF_UNIX socket for RPC client mux daemon. */ #ifndef HAL_CLIENT_DAEMON_DEFAULT_SOCKET_NAME #define HAL_CLIENT_DAEMON_DEFAULT_SOCKET_NAME "/tmp/.cryptech_muxd.rpc" #endif /* * Default device name and line speed for HAL RPC serial connection to HSM. */ #ifndef HAL_CLIENT_SERIAL_DEFAULT_DEVICE #define HAL_CLIENT_SERIAL_DEFAULT_DEVICE "/dev/ttyUSB0" #endif #ifndef HAL_CLIENT_SERIAL_DEFAULT_SPEED #define HAL_CLIENT_SERIAL_DEFAULT_SPEED 921600 #endif /* * Names of environment variables for setting the above in RPC clients. */ #define HAL_CLIENT_SERIAL_DEVICE_ENVVAR "CRYPTECH_RPC_CLIENT_SERIAL_DEVICE" #define HAL_CLIENT_SERIAL_SPEED_ENVVAR "CRYPTECH_RPC_CLIENT_SERIAL_SPEED" #endif /* _HAL_INTERNAL_H_ */ /* * Local variables: * indent-tabs-mode: nil * End: */ '>664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 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