221 lines
6.6 KiB
C
221 lines
6.6 KiB
C
/*******************************************************************
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* You shouldn't edit this file unless you know you need to.
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* This file is only included from options.h
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*******************************************************************/
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#ifndef DROPBEAR_VERSION
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#define DROPBEAR_VERSION "2017.75"
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#endif
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#define LOCAL_IDENT "SSH-2.0-dropbear_" DROPBEAR_VERSION
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#define PROGNAME "dropbear"
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/* Spec recommends after one hour or 1 gigabyte of data. One hour
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* is a bit too verbose, so we try 8 hours */
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#ifndef KEX_REKEY_TIMEOUT
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/* dingcheng:change it for voiceapp */
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#define KEX_REKEY_TIMEOUT (3600 * 24 * 7) //default : (3600 * 8)
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#endif
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#ifndef KEX_REKEY_DATA
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#define KEX_REKEY_DATA (1<<30) /* 2^30 == 1GB, this value must be < INT_MAX */
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#endif
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/* Close connections to clients which haven't authorised after AUTH_TIMEOUT */
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#ifndef AUTH_TIMEOUT
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#define AUTH_TIMEOUT 300 /* we choose 5 minutes */
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#endif
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/* Minimum key sizes for DSS and RSA */
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#ifndef MIN_DSS_KEYLEN
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#define MIN_DSS_KEYLEN 512
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#endif
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#ifndef MIN_RSA_KEYLEN
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#define MIN_RSA_KEYLEN 512
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#endif
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#define MAX_BANNER_SIZE 2000 /* this is 25*80 chars, any more is foolish */
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#define MAX_BANNER_LINES 20 /* How many lines the client will display */
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/* the number of NAME=VALUE pairs to malloc for environ, if we don't have
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* the clearenv() function */
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#define ENV_SIZE 100
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#define MAX_CMD_LEN 1024 /* max length of a command */
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#define MAX_TERM_LEN 200 /* max length of TERM name */
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#define MAX_HOST_LEN 254 /* max hostname len for tcp fwding */
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#define MAX_IP_LEN 15 /* strlen("255.255.255.255") == 15 */
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#define DROPBEAR_MAX_PORTS 10 /* max number of ports which can be specified,
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ipv4 and ipv6 don't count twice */
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/* Each port might have at least a v4 and a v6 address */
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#define MAX_LISTEN_ADDR (DROPBEAR_MAX_PORTS*3)
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#define _PATH_TTY "/dev/tty"
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#define _PATH_CP "/bin/cp"
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/* success/failure defines */
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#define DROPBEAR_SUCCESS 0
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#define DROPBEAR_FAILURE -1
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/* various algorithm identifiers */
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#define DROPBEAR_KEX_DH_GROUP1 0
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#define DROPBEAR_KEX_DH_GROUP14 1
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#define DROPBEAR_SIGNKEY_ANY 0
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#define DROPBEAR_SIGNKEY_RSA 1
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#define DROPBEAR_SIGNKEY_DSS 2
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#define DROPBEAR_SIGNKEY_NONE 3
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#define DROPBEAR_COMP_NONE 0
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#define DROPBEAR_COMP_ZLIB 1
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#define DROPBEAR_COMP_ZLIB_DELAY 2
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/* Required for pubkey auth */
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#if defined(ENABLE_SVR_PUBKEY_AUTH) || defined(DROPBEAR_CLIENT)
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#define DROPBEAR_SIGNKEY_VERIFY
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#endif
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/* SHA1 is 20 bytes == 160 bits */
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#define SHA1_HASH_SIZE 20
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/* SHA512 is 64 bytes == 512 bits */
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#define SHA512_HASH_SIZE 64
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/* MD5 is 16 bytes = 128 bits */
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#define MD5_HASH_SIZE 16
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/* largest of MD5 and SHA1 */
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#define MAX_MAC_LEN SHA1_HASH_SIZE
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#define MAX_KEY_LEN 32 /* 256 bits for aes256 etc */
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#define MAX_IV_LEN 20 /* must be same as max blocksize,
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and >= SHA1_HASH_SIZE */
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#define MAX_MAC_KEY 20
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#define MAX_NAME_LEN 64 /* maximum length of a protocol name, isn't
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explicitly specified for all protocols (just
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for algos) but seems valid */
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#define MAX_PROPOSED_ALGO 20
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/* size/count limits */
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/* From transport rfc */
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#define MIN_PACKET_LEN 16
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#define RECV_MAX_PACKET_LEN (MAX(35000, ((RECV_MAX_PAYLOAD_LEN)+100)))
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/* for channel code */
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#define TRANS_MAX_WINDOW 500000000 /* 500MB is sufficient, stopping overflow */
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#define TRANS_MAX_WIN_INCR 500000000 /* overflow prevention */
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#define RECV_WINDOWEXTEND (opts.recv_window / 3) /* We send a "window extend" every
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RECV_WINDOWEXTEND bytes */
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#define MAX_RECV_WINDOW (1024*1024) /* 1 MB should be enough */
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#define MAX_CHANNELS 100 /* simple mem restriction, includes each tcp/x11
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connection, so can't be _too_ small */
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#define MAX_STRING_LEN 1400 /* ~= MAX_PROPOSED_ALGO * MAX_NAME_LEN, also
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is the max length for a password etc */
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/* For a 4096 bit DSS key, empirically determined */
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#define MAX_PUBKEY_SIZE 1700
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/* For a 4096 bit DSS key, empirically determined */
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#define MAX_PRIVKEY_SIZE 1700
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/* The maximum size of the bignum portion of the kexhash buffer */
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/* Sect. 8 of the transport rfc 4253, K_S + e + f + K */
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#define KEXHASHBUF_MAX_INTS (1700 + 130 + 130 + 130)
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#define DROPBEAR_MAX_SOCKS 2 /* IPv4, IPv6 are all we'll get for now. Revisit
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in a few years time.... */
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#define DROPBEAR_MAX_CLI_PASS 1024
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#define DROPBEAR_MAX_CLI_INTERACT_PROMPTS 80 /* The number of prompts we'll
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accept for keyb-interactive
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auth */
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#if defined(DROPBEAR_AES256) || defined(DROPBEAR_AES128)
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#define DROPBEAR_AES
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#endif
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#if defined(DROPBEAR_TWOFISH256) || defined(DROPBEAR_TWOFISH128)
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#define DROPBEAR_TWOFISH
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#endif
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#ifndef ENABLE_X11FWD
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#define DISABLE_X11FWD
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#endif
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#if defined(ENABLE_CLI_REMOTETCPFWD) || defined(ENABLE_CLI_LOCALTCPFWD)
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#define ENABLE_CLI_ANYTCPFWD
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#endif
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#if defined(ENABLE_CLI_LOCALTCPFWD) || defined(ENABLE_SVR_REMOTETCPFWD)
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#define DROPBEAR_TCP_ACCEPT
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#endif
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#if defined(ENABLE_CLI_REMOTETCPFWD) || defined(ENABLE_CLI_LOCALTCPFWD) || \
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defined(ENABLE_SVR_REMOTETCPFWD) || defined(ENABLE_SVR_LOCALTCPFWD) || \
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defined(ENABLE_SVR_AGENTFWD) || defined(ENABLE_X11FWD)
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#define USING_LISTENERS
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#endif
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#if defined(ENABLE_SVR_AGENTFWD) || defined(ENABLE_CLI_LOCALTCPFWD)
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#define ENABLE_AGENTFWD
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#endif
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#if defined(ENABLE_CLI_NETCAT) && defined(ENABLE_CLI_PROXYCMD)
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#define ENABLE_CLI_MULTIHOP
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#endif
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#if defined(ENABLE_CLI_AGENTFWD) || defined(DROPBEAR_PRNGD_SOCKET)
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#define ENABLE_CONNECT_UNIX
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#endif
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#if defined(DROPBEAR_CLIENT) || defined(ENABLE_SVR_PUBKEY_AUTH)
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#define DROPBEAR_KEY_LINES /* ie we're using authorized_keys or known_hosts */
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#endif
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/* Changing this is inadvisable, it appears to have problems
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* with flushing compressed data */
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#define DROPBEAR_ZLIB_MEM_LEVEL 8
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#if defined(ENABLE_SVR_PASSWORD_AUTH) && defined(ENABLE_SVR_PAM_AUTH)
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#error "You can't turn on PASSWORD and PAM auth both at once. Fix it in options.h"
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#endif
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#if defined(DROPBEAR_RANDOM_DEV) && defined(DROPBEAR_PRNGD_SOCKET)
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#error "You can't turn on DROPBEAR_PRNGD_SOCKET and DROPBEAR_RANDOM_DEV at once"
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#endif
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#if !defined(DROPBEAR_RANDOM_DEV) && !defined(DROPBEAR_PRNGD_SOCKET)
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#error "You must choose one of DROPBEAR_PRNGD_SOCKET or DROPBEAR_RANDOM_DEV in options.h"
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#endif
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/* We use dropbear_client and dropbear_server as shortcuts to avoid redundant
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* code, if we're just compiling as client or server */
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#if defined(DROPBEAR_SERVER) && defined(DROPBEAR_CLIENT)
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#define IS_DROPBEAR_SERVER (ses.isserver == 1)
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#define IS_DROPBEAR_CLIENT (ses.isserver == 0)
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#elif defined(DROPBEAR_SERVER)
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#define IS_DROPBEAR_SERVER 1
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#define IS_DROPBEAR_CLIENT 0
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#elif defined(DROPBEAR_CLIENT)
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#define IS_DROPBEAR_SERVER 0
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#define IS_DROPBEAR_CLIENT 1
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#else
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/* Just building key utils? */
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#define IS_DROPBEAR_SERVER 0
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#define IS_DROPBEAR_CLIENT 0
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#endif
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