ref: 0e516cbf488a9ec8edae3dc6efca2baa0c3d95bd
dir: /sys/src/cmd/ssh/ssh.h/
#include <u.h> #include <libc.h> #include <mp.h> #include <auth.h> #include <libsec.h> enum /* internal debugging flags */ { DBG= 1<<0, DBG_CRYPTO= 1<<1, DBG_PACKET= 1<<2, DBG_AUTH= 1<<3, DBG_PROC= 1<<4, DBG_PROTO= 1<<5, DBG_IO= 1<<6, DBG_SCP= 1<<7, }; enum /* protocol packet types */ { /* 0 */ 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, }; enum /* protocol flags */ { SSH_PROTOFLAG_SCREEN_NUMBER=1<<0, SSH_PROTOFLAG_HOST_IN_FWD_OPEN=1<<1, }; enum /* agent protocol packet types */ { SSH_AGENTC_NONE = 0, 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, }; enum /* protocol constants */ { SSH_MAX_DATA = 256*1024, SSH_MAX_MSG = SSH_MAX_DATA+4, SESSKEYLEN = 32, SESSIDLEN = 16, COOKIELEN = 8, }; enum /* crypto ids */ { SSH_CIPHER_NONE = 0, SSH_CIPHER_IDEA, SSH_CIPHER_DES, SSH_CIPHER_3DES, SSH_CIPHER_TSS, SSH_CIPHER_RC4, SSH_CIPHER_BLOWFISH, SSH_CIPHER_TWIDDLE, /* for debugging */ }; enum /* auth method ids */ { SSH_AUTH_RHOSTS = 1, SSH_AUTH_RSA = 2, SSH_AUTH_PASSWORD = 3, SSH_AUTH_RHOSTS_RSA = 4, SSH_AUTH_TIS = 5, SSH_AUTH_USER_RSA = 6, }; typedef struct Auth Auth; typedef struct Authsrv Authsrv; typedef struct Cipher Cipher; typedef struct CipherState CipherState; typedef struct Conn Conn; typedef struct Msg Msg; #pragma incomplete CipherState struct Auth { int id; char *name; int (*fn)(Conn*); }; struct Authsrv { int id; char *name; int firstmsg; AuthInfo *(*fn)(Conn*, Msg*); }; struct Cipher { int id; char *name; CipherState *(*init)(Conn*, int isserver); void (*encrypt)(CipherState*, uchar*, int); void (*decrypt)(CipherState*, uchar*, int); }; struct Conn { QLock; int fd[2]; CipherState *cstate; uchar cookie[COOKIELEN]; uchar sessid[SESSIDLEN]; uchar sesskey[SESSKEYLEN]; RSApub *serverkey; RSApub *hostkey; ulong flags; ulong ciphermask; Cipher *cipher; /* chosen cipher */ Cipher **okcipher; /* list of acceptable ciphers */ int nokcipher; ulong authmask; Auth **okauth; int nokauth; char *user; char *host; char *aliases; int interactive; Msg *unget; RSApriv *serverpriv; /* server only */ RSApriv *hostpriv; Authsrv **okauthsrv; int nokauthsrv; }; struct Msg { Conn *c; uchar type; ulong len; /* output: #bytes before pos, input: #bytes after pos */ uchar *bp; /* beginning of allocated space */ uchar *rp; /* read pointer */ uchar *wp; /* write pointer */ uchar *ep; /* end of allocated space */ Msg *link; /* for sshnet */ }; #define LONG(p) (((p)[0]<<24)|((p)[1]<<16)|((p)[2]<<8)|((p)[3])) #define PLONG(p, l) \ (((p)[0]=(l)>>24),((p)[1]=(l)>>16),\ ((p)[2]=(l)>>8),((p)[3]=(l))) #define SHORT(p) (((p)[0]<<8)|(p)[1]) #define PSHORT(p,l) \ (((p)[0]=(l)>>8),((p)[1]=(l))) extern char Edecode[]; extern char Eencode[]; extern char Ememory[]; extern char Ehangup[]; extern int doabort; extern int debuglevel; extern Auth authpassword; extern Auth authrsa; extern Auth authtis; extern Authsrv authsrvpassword; extern Authsrv authsrvtis; extern Cipher cipher3des; extern Cipher cipherblowfish; extern Cipher cipherdes; extern Cipher cipherrc4; extern Cipher ciphernone; extern Cipher ciphertwiddle; /* msg.c */ Msg* allocmsg(Conn*, int, int); void badmsg(Msg*, int); Msg* recvmsg(Conn*, int); void unrecvmsg(Conn*, Msg*); int sendmsg(Msg*); uchar getbyte(Msg*); ushort getshort(Msg*); ulong getlong(Msg*); char* getstring(Msg*); void* getbytes(Msg*, int); mpint* getmpint(Msg*); RSApub* getRSApub(Msg*); void putbyte(Msg*, uchar); void putshort(Msg*, ushort); void putlong(Msg*, ulong); void putstring(Msg*, char*); void putbytes(Msg*, void*, long); void putmpint(Msg*, mpint*); void putRSApub(Msg*, RSApub*); mpint* rsapad(mpint*, int); mpint* rsaunpad(mpint*); void mptoberjust(mpint*, uchar*, int); mpint* rsaencryptbuf(RSApub*, uchar*, int); /* cmsg.c */ void sshclienthandshake(Conn*); void requestpty(Conn*); int readgeom(int*, int*, int*, int*); void sendwindowsize(Conn*, int, int, int, int); int rawhack; /* smsg.c */ void sshserverhandshake(Conn*); /* pubkey.c */ enum { KeyOk, KeyWrong, NoKey, NoKeyFile, }; int appendkey(char*, char*, RSApub*); int findkey(char*, char*, RSApub*); int replacekey(char*, char*, RSApub*); /* agent.c */ int startagent(Conn*); void handleagentmsg(Msg*); void handleagentopen(Msg*); void handleagentieof(Msg*); void handleagentoclose(Msg*); /* util.c */ void debug(int, char*, ...); void* emalloc(long); void* erealloc(void*, long); void error(char*, ...); RSApriv* readsecretkey(char*); int readstrnl(int, char*, int); void atexitkill(int); void atexitkiller(void); void calcsessid(Conn*); void sshlog(char*, ...); void setaliases(Conn*, char*); void privatefactotum(void); #pragma varargck argpos debug 2 #pragma varargck argpos error 1 #pragma varargck argpos sshlog 2