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# internal debugging flags
DBG, DBG_CRYPTO, DBG_PACKET, DBG_AUTH, DBG_PROC, DBG_PROTO, DBG_IO, DBG_SCP: con 1<<iota;
# protocol packet types
SSH_MSG_NONE, # 0
SSH_MSG_DISCONNECT,
SSH_SMSG_PUBLIC_KEY,
SSH_CMSG_SESSION_KEY,
SSH_CMSG_USER,
SSH_CMSG_AUTH_RHOSTS,
SSH_CMSG_AUTH_RSA,
SSH_SMSG_AUTH_RSA_CHALLENGE,
SSH_CMSG_AUTH_RSA_RESPONSE,
SSH_CMSG_AUTH_PASSWORD, # 10
SSH_CMSG_REQUEST_PTY,
SSH_CMSG_WINDOW_SIZE,
SSH_CMSG_EXEC_SHELL,
SSH_CMSG_EXEC_CMD,
SSH_SMSG_SUCCESS,
SSH_SMSG_FAILURE,
SSH_CMSG_STDIN_DATA,
SSH_SMSG_STDOUT_DATA,
SSH_SMSG_STDERR_DATA,
SSH_CMSG_EOF, # 20
SSH_SMSG_EXITSTATUS,
SSH_MSG_CHANNEL_OPEN_CONFIRMATION,
SSH_MSG_CHANNEL_OPEN_FAILURE,
SSH_MSG_CHANNEL_DATA,
SSH_MSG_CHANNEL_INPUT_EOF,
SSH_MSG_CHANNEL_OUTPUT_CLOSED,
SSH_MSG_UNIX_DOMAIN_X11_FORWARDING, # obsolete
SSH_SMSG_X11_OPEN,
SSH_CMSG_PORT_FORWARD_REQUEST,
SSH_MSG_PORT_OPEN, # 30
SSH_CMSG_AGENT_REQUEST_FORWARDING,
SSH_SMSG_AGENT_OPEN,
SSH_MSG_IGNORE,
SSH_CMSG_EXIT_CONFIRMATION,
SSH_CMSG_X11_REQUEST_FORWARDING,
SSH_CMSG_AUTH_RHOSTS_RSA,
SSH_MSG_DEBUG,
SSH_CMSG_REQUEST_COMPRESSION,
SSH_CMSG_MAX_PACKET_SIZE,
SSH_CMSG_AUTH_TIS, # 40
SSH_SMSG_AUTH_TIS_CHALLENGE,
SSH_CMSG_AUTH_TIS_RESPONSE,
SSH_CMSG_AUTH_KERBEROS,
SSH_SMSG_AUTH_KERBEROS_RESPONSE,
SSH_CMSG_HAVE_KERBEROS_TGT: con iota;
SSH_MSG_ERROR: con -1;
# protocol flags
SSH_PROTOFLAG_SCREEN_NUMBER: con 1<<0;
SSH_PROTOFLAG_HOST_IN_FWD_OPEN: con 1<<1;
# agent protocol packet types
SSH_AGENTC_NONE,
SSH_AGENTC_REQUEST_RSA_IDENTITIES,
SSH_AGENT_RSA_IDENTITIES_ANSWER,
SSH_AGENTC_RSA_CHALLENGE,
SSH_AGENT_RSA_RESPONSE,
SSH_AGENT_FAILURE,
SSH_AGENT_SUCCESS,
SSH_AGENTC_ADD_RSA_IDENTITY,
SSH_AGENTC_REMOVE_RSA_IDENTITY: con iota;
# protocol constants
SSH_MAX_DATA: con 256*1024;
SSH_MAX_MSG: con SSH_MAX_DATA+4;
SESSKEYLEN: con 32;
SESSIDLEN: con 16;
COOKIELEN: con 8;
# crypto ids
SSH_CIPHER_NONE,
SSH_CIPHER_IDEA,
SSH_CIPHER_DES,
SSH_CIPHER_3DES,
SSH_CIPHER_TSS,
SSH_CIPHER_RC4,
SSH_CIPHER_BLOWFISH: con iota;
# auth method ids
SSH_AUTH_RHOSTS,
SSH_AUTH_RSA,
SSH_AUTH_PASSWORD,
SSH_AUTH_RHOSTS_RSA,
SSH_AUTH_TIS,
SSH_AUTH_USER_RSA: con 1+iota;
Edecode: con "error decoding input packet";
Eencode: con "out of space encoding output packet (BUG)";
Ehangup: con "hungup connection";
Ememory: con "out of memory";
Cipher: module
{
id: fn(): int;
init: fn(key: array of byte, isserver: int);
encrypt: fn(a: array of byte, n: int);
decrypt: fn(a: array of byte, n: int);
};
Auth: module
{
AuthInfo: adt{
user: string;
cap: string;
};
id: fn(): int;
firstmsg: fn(): int;
init: fn(nil: Sshio);
authsrv: fn(nil: ref Sshio->Conn, nil: ref Sshio->Msg): ref AuthInfo;
auth: fn(nil: ref Sshio->Conn): int;
};
Sshio: module
{
PATH: con "sshio.dis";
Conn: adt{
in: chan of (ref Msg, string);
out: chan of ref Msg;
sessid: array of byte;
sesskey: array of byte;
hostkey: ref Crypt->PK.RSA;
flags: int;
cipher: Cipher; # chosen cipher
user: string;
host: string;
interactive: int;
unget: ref Msg;
mk: fn(host: string, fd: ref Sys->FD): ref Conn;
setkey: fn(c: self ref Conn, key: ref Crypt->PK.RSA);
};
Msg: adt{
mtype: int;
data: array of byte;
rp: int; # read pointer
wp: int; # write pointer
ep: int; # byte just beyond message data
mk: fn(mtype: int, length: int): ref Msg;
text: fn(m: self ref Msg): string;
fulltext: fn(m: self ref Msg): string;
get1: fn(m: self ref Msg): int;
get2: fn(m: self ref Msg): int;
get4: fn(m: self ref Msg): int;
getstring: fn(m: self ref Msg): string;
getbytes: fn(m: self ref Msg, n: int): array of byte;
getarray: fn(m: self ref Msg): array of byte;
getipint: fn(m: self ref Msg): ref IPints->IPint;
getpk: fn(m: self ref Msg): ref Crypt->PK.RSA;
put1: fn(m: self ref Msg, nil: int);
put2: fn(m: self ref Msg, nil: int);
put4: fn(m: self ref Msg, nil: int);
putstring: fn(m: self ref Msg, s: string);
putbytes: fn(m: self ref Msg, a: array of byte, n: int);
putipint: fn(m: self ref Msg, mp: ref IPints->IPint);
putpk: fn(m: self ref Msg, pk: ref Crypt->PK.RSA);
};
init: fn();
badmsg: fn(nil: ref Msg, nil: int, err: string);
recvmsg: fn(nil: ref Conn, nil: int): ref Msg;
unrecvmsg: fn(nil: ref Conn, nil: ref Msg);
rsapad: fn(nil: ref IPints->IPint, nil: int): ref IPints->IPint;
rsaunpad: fn(nil: ref IPints->IPint): ref IPints->IPint;
iptorjustbe: fn(nil: ref IPints->IPint, nil: array of byte, nil: int);
rsaencryptbuf: fn(nil: ref Crypt->PK.RSA, nil: array of byte, nil: int): ref IPints->IPint;
rsagen: fn(nbits: int): ref Crypt->SK.RSA;
rsaencrypt: fn(key: ref Crypt->PK.RSA, b: ref IPints->IPint): ref IPints->IPint;
rsadecrypt: fn(key: ref Crypt->SK.RSA, b: ref IPints->IPint): ref IPints->IPint;
debug: fn(nil: int, nil: string);
error: fn(nil: string);
readstrnl: fn(fd: ref Sys->FD, buf: array of byte, nbytes: int): int;
calcsessid: fn(hostmod: ref IPints->IPint, servermod: ref IPints->IPint, cookie: array of byte): array of byte;
# sshlog: fn(nil: array of byte); # TBA was ...
fastrand: fn(): int;
eqbytes: fn(a: array of byte, b: array of byte, n: int): int;
readversion: fn(fd: ref Sys->FD): (int, int, string);
hex: fn(a: array of byte): string;
};
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