X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=ssh.h;h=371de8373cb13569daf8b2e31d886d3755847a98;hb=510f49e405e71ba5c97875e7a019364e1ef5fac9;hp=60c54e4dd0675962083e9d1ff8d045a458422a8c;hpb=947962e0b95e10151c186048a8b5cc2fb425838c;p=PuTTY.git diff --git a/ssh.h b/ssh.h index 60c54e4d..371de837 100644 --- a/ssh.h +++ b/ssh.h @@ -8,10 +8,55 @@ #include "misc.h" struct ssh_channel; +typedef struct ssh_tag *Ssh; extern int sshfwd_write(struct ssh_channel *c, char *, int); extern void sshfwd_write_eof(struct ssh_channel *c); +extern void sshfwd_unclean_close(struct ssh_channel *c, const char *err); extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize); +Conf *sshfwd_get_conf(struct ssh_channel *c); +void sshfwd_x11_sharing_handover(struct ssh_channel *c, + void *share_cs, void *share_chan, + const char *peer_addr, int peer_port, + int endian, int protomajor, int protominor, + const void *initial_data, int initial_len); +void sshfwd_x11_is_local(struct ssh_channel *c); + +extern Socket ssh_connection_sharing_init(const char *host, int port, + Conf *conf, Ssh ssh, void **state); +int ssh_share_test_for_upstream(const char *host, int port, Conf *conf); +void share_got_pkt_from_server(void *ctx, int type, + unsigned char *pkt, int pktlen); +void share_activate(void *state, const char *server_verstring); +void sharestate_free(void *state); +int share_ndownstreams(void *state); + +void ssh_connshare_log(Ssh ssh, int event, const char *logtext, + const char *ds_err, const char *us_err); +unsigned ssh_alloc_sharing_channel(Ssh ssh, void *sharing_ctx); +void ssh_delete_sharing_channel(Ssh ssh, unsigned localid); +int ssh_alloc_sharing_rportfwd(Ssh ssh, const char *shost, int sport, + void *share_ctx); +void ssh_sharing_queue_global_request(Ssh ssh, void *share_ctx); +struct X11FakeAuth *ssh_sharing_add_x11_display(Ssh ssh, int authtype, + void *share_cs, + void *share_chan); +void ssh_sharing_remove_x11_display(Ssh ssh, struct X11FakeAuth *auth); +void ssh_send_packet_from_downstream(Ssh ssh, unsigned id, int type, + const void *pkt, int pktlen, + const char *additional_log_text); +void ssh_sharing_downstream_connected(Ssh ssh, unsigned id, + const char *peerinfo); +void ssh_sharing_downstream_disconnected(Ssh ssh, unsigned id); +void ssh_sharing_logf(Ssh ssh, unsigned id, const char *logfmt, ...); +int ssh_agent_forwarding_permitted(Ssh ssh); +void share_setup_x11_channel(void *csv, void *chanv, + unsigned upstream_id, unsigned server_id, + unsigned server_currwin, unsigned server_maxpkt, + unsigned client_adjusted_window, + const char *peer_addr, int peer_port, int endian, + int protomajor, int protominor, + const void *initial_data, int initial_len); /* * Useful thing. @@ -56,9 +101,81 @@ struct dss_key { Bignum p, q, g, y, x; }; -int makekey(unsigned char *data, int len, struct RSAKey *result, - unsigned char **keystr, int order); -int makeprivate(unsigned char *data, int len, struct RSAKey *result); +struct ec_curve; + +struct ec_point { + const struct ec_curve *curve; + Bignum x, y; + Bignum z; /* Jacobian denominator */ + unsigned char infinity; +}; + +void ec_point_free(struct ec_point *point); + +/* Weierstrass form curve */ +struct ec_wcurve +{ + Bignum a, b, n; + struct ec_point G; +}; + +/* Montgomery form curve */ +struct ec_mcurve +{ + Bignum a, b; + struct ec_point G; +}; + +/* Edwards form curve */ +struct ec_ecurve +{ + Bignum l, d; + struct ec_point B; +}; + +struct ec_curve { + enum { EC_WEIERSTRASS, EC_MONTGOMERY, EC_EDWARDS } type; + /* 'name' is the identifier of the curve when it has to appear in + * wire protocol encodings, as it does in e.g. the public key and + * signature formats for NIST curves. Curves which do not format + * their keys or signatures in this way just have name==NULL. + * + * 'textname' is non-NULL for all curves, and is a human-readable + * identification suitable for putting in log messages. */ + const char *name, *textname; + unsigned int fieldBits; + Bignum p; + union { + struct ec_wcurve w; + struct ec_mcurve m; + struct ec_ecurve e; + }; +}; + +const struct ssh_signkey *ec_alg_by_oid(int len, const void *oid, + const struct ec_curve **curve); +const unsigned char *ec_alg_oid(const struct ssh_signkey *alg, int *oidlen); +extern const int ec_nist_curve_lengths[], n_ec_nist_curve_lengths; +int ec_nist_alg_and_curve_by_bits(int bits, + const struct ec_curve **curve, + const struct ssh_signkey **alg); +int ec_ed_alg_and_curve_by_bits(int bits, + const struct ec_curve **curve, + const struct ssh_signkey **alg); + +struct ssh_signkey; + +struct ec_key { + const struct ssh_signkey *signalg; + struct ec_point publicKey; + Bignum privateKey; +}; + +struct ec_point *ec_public(const Bignum privateKey, const struct ec_curve *curve); + +int makekey(const unsigned char *data, int len, struct RSAKey *result, + const unsigned char **keystr, int order); +int makeprivate(const unsigned char *data, int len, struct RSAKey *result); int rsaencrypt(unsigned char *data, int length, struct RSAKey *key); Bignum rsadecrypt(Bignum input, struct RSAKey *key); void rsasign(unsigned char *data, int length, struct RSAKey *key); @@ -98,6 +215,22 @@ void ssh_rsakex_encrypt(const struct ssh_hash *h, unsigned char *in, int inlen, unsigned char *out, int outlen, void *key); +/* + * SSH2 ECDH key exchange functions + */ +struct ssh_kex; +const char *ssh_ecdhkex_curve_textname(const struct ssh_kex *kex); +void *ssh_ecdhkex_newkey(const struct ssh_kex *kex); +void ssh_ecdhkex_freekey(void *key); +char *ssh_ecdhkex_getpublic(void *key, int *len); +Bignum ssh_ecdhkex_getkey(void *key, char *remoteKey, int remoteKeyLen); + +/* + * Helper function for k generation in DSA, reused in ECDSA + */ +Bignum *dss_gen_k(const char *id_string, Bignum modulus, Bignum private_key, + unsigned char *digest, int digest_len); + typedef struct { uint32 h[4]; } MD5_Core_State; @@ -119,7 +252,7 @@ void MD5Update(struct MD5Context *context, unsigned char const *buf, void MD5Final(unsigned char digest[16], struct MD5Context *context); void MD5Simple(void const *p, unsigned len, unsigned char output[16]); -void *hmacmd5_make_context(void); +void *hmacmd5_make_context(void *); void hmacmd5_free_context(void *handle); void hmacmd5_key(void *handle, void const *key, int len); void hmacmd5_do_hmac(void *handle, unsigned char const *blk, int len, @@ -132,9 +265,9 @@ typedef struct { uint32 lenhi, lenlo; } SHA_State; void SHA_Init(SHA_State * s); -void SHA_Bytes(SHA_State * s, void *p, int len); +void SHA_Bytes(SHA_State * s, const void *p, int len); void SHA_Final(SHA_State * s, unsigned char *output); -void SHA_Simple(void *p, int len, unsigned char *output); +void SHA_Simple(const void *p, int len, unsigned char *output); void hmac_sha1_simple(void *key, int keylen, void *data, int datalen, unsigned char *output); @@ -155,11 +288,17 @@ typedef struct { int blkused; uint32 len[4]; } SHA512_State; +#define SHA384_State SHA512_State void SHA512_Init(SHA512_State * s); void SHA512_Bytes(SHA512_State * s, const void *p, int len); void SHA512_Final(SHA512_State * s, unsigned char *output); void SHA512_Simple(const void *p, int len, unsigned char *output); +void SHA384_Init(SHA384_State * s); +#define SHA384_Bytes(s, p, len) SHA512_Bytes(s, p, len) +void SHA384_Final(SHA384_State * s, unsigned char *output); +void SHA384_Simple(const void *p, int len, unsigned char *output); +struct ssh_mac; struct ssh_cipher { void *(*make_context)(void); void (*free_context)(void *); @@ -167,7 +306,7 @@ struct ssh_cipher { void (*encrypt) (void *, unsigned char *blk, int len); void (*decrypt) (void *, unsigned char *blk, int len); int blksize; - char *text_name; + const char *text_name; }; struct ssh2_cipher { @@ -177,12 +316,30 @@ struct ssh2_cipher { void (*setkey) (void *, unsigned char *key);/* for SSH-2 */ void (*encrypt) (void *, unsigned char *blk, int len); void (*decrypt) (void *, unsigned char *blk, int len); - char *name; + /* Ignored unless SSH_CIPHER_SEPARATE_LENGTH flag set */ + void (*encrypt_length) (void *, unsigned char *blk, int len, unsigned long seq); + void (*decrypt_length) (void *, unsigned char *blk, int len, unsigned long seq); + const char *name; int blksize; - int keylen; + /* real_keybits is the number of bits of entropy genuinely used by + * the cipher scheme; it's used for deciding how big a + * Diffie-Hellman group is needed to exchange a key for the + * cipher. */ + int real_keybits; + /* padded_keybytes is the number of bytes of key data expected as + * input to the setkey function; it's used for deciding how much + * data needs to be generated from the post-kex generation of key + * material. In a sensible cipher which uses all its key bytes for + * real work, this will just be real_keybits/8, but in DES-type + * ciphers which ignore one bit in each byte, it'll be slightly + * different. */ + int padded_keybytes; unsigned int flags; #define SSH_CIPHER_IS_CBC 1 - char *text_name; +#define SSH_CIPHER_SEPARATE_LENGTH 2 + const char *text_name; + /* If set, this takes priority over other MAC. */ + const struct ssh_mac *required_mac; }; struct ssh2_ciphers { @@ -191,7 +348,8 @@ struct ssh2_ciphers { }; struct ssh_mac { - void *(*make_context)(void); + /* Passes in the cipher context */ + void *(*make_context)(void *); void (*free_context)(void *); void (*setkey) (void *, unsigned char *key); /* whole-packet operations */ @@ -202,26 +360,26 @@ struct ssh_mac { void (*bytes) (void *, unsigned char const *, int); void (*genresult) (void *, unsigned char *); int (*verresult) (void *, unsigned char const *); - char *name; - int len; - char *text_name; + const char *name, *etm_name; + int len, keylen; + const char *text_name; }; struct ssh_hash { void *(*init)(void); /* also allocates context */ - void (*bytes)(void *, void *, int); + void *(*copy)(const void *); + void (*bytes)(void *, const void *, int); void (*final)(void *, unsigned char *); /* also frees context */ + void (*free)(void *); int hlen; /* output length in bytes */ - char *text_name; + const char *text_name; }; struct ssh_kex { - char *name, *groupname; - enum { KEXTYPE_DH, KEXTYPE_RSA } main_type; - /* For DH */ - const unsigned char *pdata, *gdata; /* NULL means group exchange */ - int plen, glen; + const char *name, *groupname; + enum { KEXTYPE_DH, KEXTYPE_RSA, KEXTYPE_ECDH } main_type; const struct ssh_hash *hash; + const void *extra; /* private to the kex methods */ }; struct ssh_kexes { @@ -230,30 +388,43 @@ struct ssh_kexes { }; struct ssh_signkey { - void *(*newkey) (char *data, int len); + void *(*newkey) (const struct ssh_signkey *self, + const char *data, int len); void (*freekey) (void *key); char *(*fmtkey) (void *key); unsigned char *(*public_blob) (void *key, int *len); unsigned char *(*private_blob) (void *key, int *len); - void *(*createkey) (unsigned char *pub_blob, int pub_len, - unsigned char *priv_blob, int priv_len); - void *(*openssh_createkey) (unsigned char **blob, int *len); + void *(*createkey) (const struct ssh_signkey *self, + const unsigned char *pub_blob, int pub_len, + const unsigned char *priv_blob, int priv_len); + void *(*openssh_createkey) (const struct ssh_signkey *self, + const unsigned char **blob, int *len); int (*openssh_fmtkey) (void *key, unsigned char *blob, int len); - int (*pubkey_bits) (void *blob, int len); - char *(*fingerprint) (void *key); - int (*verifysig) (void *key, char *sig, int siglen, - char *data, int datalen); - unsigned char *(*sign) (void *key, char *data, int datalen, + /* OpenSSH private key blobs, as created by openssh_fmtkey and + * consumed by openssh_createkey, always (at least so far...) take + * the form of a number of SSH-2 strings / mpints concatenated + * end-to-end. Because the new-style OpenSSH private key format + * stores those blobs without a containing string wrapper, we need + * to know how many strings each one consists of, so that we can + * skip over the right number to find the next key in the file. + * openssh_private_npieces gives that information. */ + int openssh_private_npieces; + int (*pubkey_bits) (const struct ssh_signkey *self, + const void *blob, int len); + int (*verifysig) (void *key, const char *sig, int siglen, + const char *data, int datalen); + unsigned char *(*sign) (void *key, const char *data, int datalen, int *siglen); - char *name; - char *keytype; /* for host key cache */ + const char *name; + const char *keytype; /* for host key cache */ + const void *extra; /* private to the public key methods */ }; struct ssh_compress { - char *name; + const char *name; /* For zlib@openssh.com: if non-NULL, this name will be considered once * userauth has completed successfully. */ - char *delayed_name; + const char *delayed_name; void *(*compress_init) (void); void (*compress_cleanup) (void *); int (*compress) (void *, unsigned char *block, int len, @@ -263,7 +434,7 @@ struct ssh_compress { int (*decompress) (void *, unsigned char *block, int len, unsigned char **outblock, int *outlen); int (*disable_compression) (void *); - char *text_name; + const char *text_name; }; struct ssh2_userkey { @@ -273,7 +444,7 @@ struct ssh2_userkey { }; /* The maximum length of any hash algorithm used in kex. (bytes) */ -#define SSH2_KEX_MAX_HASH_LEN (32) /* SHA-256 */ +#define SSH2_KEX_MAX_HASH_LEN (64) /* SHA-512 */ extern const struct ssh_cipher ssh_3des; extern const struct ssh_cipher ssh_des; @@ -283,19 +454,28 @@ extern const struct ssh2_ciphers ssh2_des; extern const struct ssh2_ciphers ssh2_aes; extern const struct ssh2_ciphers ssh2_blowfish; extern const struct ssh2_ciphers ssh2_arcfour; +extern const struct ssh2_ciphers ssh2_ccp; extern const struct ssh_hash ssh_sha1; extern const struct ssh_hash ssh_sha256; +extern const struct ssh_hash ssh_sha384; +extern const struct ssh_hash ssh_sha512; extern const struct ssh_kexes ssh_diffiehellman_group1; extern const struct ssh_kexes ssh_diffiehellman_group14; extern const struct ssh_kexes ssh_diffiehellman_gex; extern const struct ssh_kexes ssh_rsa_kex; +extern const struct ssh_kexes ssh_ecdh_kex; extern const struct ssh_signkey ssh_dss; extern const struct ssh_signkey ssh_rsa; +extern const struct ssh_signkey ssh_ecdsa_ed25519; +extern const struct ssh_signkey ssh_ecdsa_nistp256; +extern const struct ssh_signkey ssh_ecdsa_nistp384; +extern const struct ssh_signkey ssh_ecdsa_nistp521; extern const struct ssh_mac ssh_hmac_md5; extern const struct ssh_mac ssh_hmac_sha1; extern const struct ssh_mac ssh_hmac_sha1_buggy; extern const struct ssh_mac ssh_hmac_sha1_96; extern const struct ssh_mac ssh_hmac_sha1_96_buggy; +extern const struct ssh_mac ssh_hmac_sha256; void *aes_make_context(void); void aes_free_context(void *handle); @@ -309,7 +489,7 @@ void aes_ssh2_decrypt_blk(void *handle, unsigned char *blk, int len); /* * PuTTY version number formatted as an SSH version string. */ -extern char sshver[]; +extern const char sshver[]; /* * Gross hack: pscp will try to start SFTP but fall back to scp1 if @@ -328,24 +508,28 @@ void random_add_heavynoise(void *noise, int length); void logevent(void *, const char *); +struct PortForwarding; + /* Allocate and register a new channel for port forwarding */ -void *new_sock_channel(void *handle, Socket s); -void ssh_send_port_open(void *channel, char *hostname, int port, char *org); +void *new_sock_channel(void *handle, struct PortForwarding *pf); +void ssh_send_port_open(void *channel, const char *hostname, int port, + const char *org); /* Exports from portfwd.c */ -extern const char *pfd_newconnect(Socket * s, char *hostname, int port, - void *c, Conf *conf, int addressfamily); +extern char *pfd_connect(struct PortForwarding **pf, char *hostname, int port, + void *c, Conf *conf, int addressfamily); +extern void pfd_close(struct PortForwarding *); +extern int pfd_send(struct PortForwarding *, char *data, int len); +extern void pfd_send_eof(struct PortForwarding *); +extern void pfd_confirm(struct PortForwarding *); +extern void pfd_unthrottle(struct PortForwarding *); +extern void pfd_override_throttle(struct PortForwarding *, int enable); +struct PortListener; /* desthost == NULL indicates dynamic (SOCKS) port forwarding */ -extern const char *pfd_addforward(char *desthost, int destport, char *srcaddr, - int port, void *backhandle, Conf *conf, - void **sockdata, int address_family); -extern void pfd_close(Socket s); -extern void pfd_terminate(void *sockdata); -extern int pfd_send(Socket s, char *data, int len); -extern void pfd_send_eof(Socket s); -extern void pfd_confirm(Socket s); -extern void pfd_unthrottle(Socket s); -extern void pfd_override_throttle(Socket s, int enable); +extern char *pfl_listen(char *desthost, int destport, char *srcaddr, + int port, void *backhandle, Conf *conf, + struct PortListener **pl, int address_family); +extern void pfl_terminate(struct PortListener *); /* Exports from x11fwd.c */ enum { @@ -366,24 +550,41 @@ struct X11Display { int port; char *realhost; - /* Auth details we invented for the virtual display on the SSH server. */ - int remoteauthproto; - unsigned char *remoteauthdata; - int remoteauthdatalen; - char *remoteauthprotoname; - char *remoteauthdatastring; - /* Our local auth details for talking to the real X display. */ int localauthproto; unsigned char *localauthdata; int localauthdatalen; +}; +struct X11FakeAuth { + /* Auth details we invented for a virtual display on the SSH server. */ + int proto; + unsigned char *data; + int datalen; + char *protoname; + char *datastring; + + /* The encrypted form of the first block, in XDM-AUTHORIZATION-1. + * Used as part of the key when these structures are organised + * into a tree. See x11_invent_fake_auth for explanation. */ + unsigned char *xa1_firstblock; /* * Used inside x11fwd.c to remember recently seen * XDM-AUTHORIZATION-1 strings, to avoid replay attacks. */ tree234 *xdmseen; + + /* + * What to do with an X connection matching this auth data. + */ + struct X11Display *disp; + void *share_cs, *share_chan; }; +void *x11_make_greeting(int endian, int protomajor, int protominor, + int auth_proto, const void *auth_data, int auth_len, + const char *peer_ip, int peer_port, + int *outlen); +int x11_authcmp(void *av, void *bv); /* for putting X11FakeAuth in a tree234 */ /* * x11_setup_display() parses the display variable and fills in an * X11Display structure. Some remote auth details are invented; @@ -391,16 +592,17 @@ struct X11Display { * authorisation protocol to use at the remote end. The local auth * details are looked up by calling platform_get_x11_auth. */ -extern struct X11Display *x11_setup_display(char *display, int authtype, - Conf *); +extern struct X11Display *x11_setup_display(const char *display, Conf *); void x11_free_display(struct X11Display *disp); -extern const char *x11_init(Socket *, struct X11Display *, void *, - const char *, int, Conf *); -extern void x11_close(Socket); -extern int x11_send(Socket, char *, int); -extern void x11_send_eof(Socket s); -extern void x11_unthrottle(Socket s); -extern void x11_override_throttle(Socket s, int enable); +struct X11FakeAuth *x11_invent_fake_auth(tree234 *t, int authtype); +void x11_free_fake_auth(struct X11FakeAuth *auth); +struct X11Connection; /* opaque outside x11fwd.c */ +struct X11Connection *x11_init(tree234 *authtree, void *, const char *, int); +extern void x11_close(struct X11Connection *); +extern int x11_send(struct X11Connection *, char *, int); +extern void x11_send_eof(struct X11Connection *s); +extern void x11_unthrottle(struct X11Connection *s); +extern void x11_override_throttle(struct X11Connection *s, int enable); char *x11_display(const char *display); /* Platform-dependent X11 functions */ extern void platform_get_x11_auth(struct X11Display *display, Conf *); @@ -427,6 +629,8 @@ char *platform_get_x_display(void); */ void x11_get_auth_from_authfile(struct X11Display *display, const char *authfilename); +int x11_identify_auth_proto(const char *proto); +void *x11_dehexify(const char *hex, int *outlen); Bignum copybn(Bignum b); Bignum bn_power_2(int n); @@ -435,9 +639,12 @@ Bignum bignum_from_long(unsigned long n); void freebn(Bignum b); Bignum modpow(Bignum base, Bignum exp, Bignum mod); Bignum modmul(Bignum a, Bignum b, Bignum mod); +Bignum modsub(const Bignum a, const Bignum b, const Bignum n); void decbn(Bignum n); extern Bignum Zero, One; Bignum bignum_from_bytes(const unsigned char *data, int nbytes); +Bignum bignum_from_bytes_le(const unsigned char *data, int nbytes); +Bignum bignum_random_in_range(const Bignum lower, const Bignum upper); int ssh1_read_bignum(const unsigned char *data, int len, Bignum * result); int bignum_bitcount(Bignum bn); int ssh1_bignum_length(Bignum bn); @@ -458,31 +665,36 @@ Bignum bigmod(Bignum a, Bignum b); Bignum modinv(Bignum number, Bignum modulus); Bignum bignum_bitmask(Bignum number); Bignum bignum_rshift(Bignum number, int shift); +Bignum bignum_lshift(Bignum number, int shift); int bignum_cmp(Bignum a, Bignum b); char *bignum_decimal(Bignum x); +Bignum bignum_from_decimal(const char *decimal); #ifdef DEBUG void diagbn(char *prefix, Bignum md); #endif +int dh_is_gex(const struct ssh_kex *kex); void *dh_setup_group(const struct ssh_kex *kex); void *dh_setup_gex(Bignum pval, Bignum gval); void dh_cleanup(void *); Bignum dh_create_e(void *, int nbits); +const char *dh_validate_f(void *handle, Bignum f); Bignum dh_find_K(void *, Bignum f); int loadrsakey(const Filename *filename, struct RSAKey *key, - char *passphrase, const char **errorstr); + const char *passphrase, const char **errorstr); int rsakey_encrypted(const Filename *filename, char **comment); int rsakey_pubblob(const Filename *filename, void **blob, int *bloblen, char **commentptr, const char **errorstr); int saversakey(const Filename *filename, struct RSAKey *key, char *passphrase); -extern int base64_decode_atom(char *atom, unsigned char *out); +extern int base64_decode_atom(const char *atom, unsigned char *out); extern int base64_lines(int datalen); -extern void base64_encode_atom(unsigned char *data, int n, char *out); -extern void base64_encode(FILE *fp, unsigned char *data, int datalen, int cpl); +extern void base64_encode_atom(const unsigned char *data, int n, char *out); +extern void base64_encode(FILE *fp, const unsigned char *data, int datalen, + int cpl); /* ssh2_load_userkey can return this as an error */ extern struct ssh2_userkey ssh2_wrong_passphrase; @@ -490,22 +702,69 @@ extern struct ssh2_userkey ssh2_wrong_passphrase; int ssh2_userkey_encrypted(const Filename *filename, char **comment); struct ssh2_userkey *ssh2_load_userkey(const Filename *filename, - char *passphrase, const char **errorstr); + const char *passphrase, + const char **errorstr); unsigned char *ssh2_userkey_loadpub(const Filename *filename, char **algorithm, int *pub_blob_len, char **commentptr, const char **errorstr); int ssh2_save_userkey(const Filename *filename, struct ssh2_userkey *key, char *passphrase); const struct ssh_signkey *find_pubkey_alg(const char *name); +const struct ssh_signkey *find_pubkey_alg_len(int namelen, const char *name); enum { SSH_KEYTYPE_UNOPENABLE, SSH_KEYTYPE_UNKNOWN, SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2, - SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM + /* + * The OpenSSH key types deserve a little explanation. OpenSSH has + * two physical formats for private key storage: an old PEM-based + * one largely dictated by their use of OpenSSL and full of ASN.1, + * and a new one using the same private key formats used over the + * wire for talking to ssh-agent. The old format can only support + * a subset of the key types, because it needs redesign for each + * key type, and after a while they decided to move to the new + * format so as not to have to do that. + * + * On input, key files are identified as either + * SSH_KEYTYPE_OPENSSH_PEM or SSH_KEYTYPE_OPENSSH_NEW, describing + * accurately which actual format the keys are stored in. + * + * On output, however, we default to following OpenSSH's own + * policy of writing out PEM-style keys for maximum backwards + * compatibility if the key type supports it, and otherwise + * switching to the new format. So the formats you can select for + * output are SSH_KEYTYPE_OPENSSH_NEW (forcing the new format for + * any key type), and SSH_KEYTYPE_OPENSSH_AUTO to use the oldest + * format supported by whatever key type you're writing out. + * + * So we have three type codes, but only two of them usable in any + * given circumstance. An input key file will never be identified + * as AUTO, only PEM or NEW; key export UIs should not be able to + * select PEM, only AUTO or NEW. + */ + SSH_KEYTYPE_OPENSSH_AUTO, + SSH_KEYTYPE_OPENSSH_PEM, + SSH_KEYTYPE_OPENSSH_NEW, + SSH_KEYTYPE_SSHCOM, + /* + * Public-key-only formats, which we still want to be able to read + * for various purposes. + */ + SSH_KEYTYPE_SSH1_PUBLIC, + SSH_KEYTYPE_SSH2_PUBLIC_RFC4716, + SSH_KEYTYPE_SSH2_PUBLIC_OPENSSH }; +char *ssh1_pubkey_str(struct RSAKey *ssh1key); +void ssh1_write_pubkey(FILE *fp, struct RSAKey *ssh1key); +char *ssh2_pubkey_openssh_str(struct ssh2_userkey *key); +void ssh2_write_pubkey(FILE *fp, const char *comment, + const void *v_pub_blob, int pub_len, + int keytype); +char *ssh2_fingerprint_blob(const void *blob, int bloblen); +char *ssh2_fingerprint(const struct ssh_signkey *alg, void *data); int key_type(const Filename *filename); -char *key_type_to_str(int type); +const char *key_type_to_str(int type); int import_possible(int type); int import_target_type(int type); @@ -530,8 +789,14 @@ void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len); -void des_encrypt_xdmauth(unsigned char *key, unsigned char *blk, int len); -void des_decrypt_xdmauth(unsigned char *key, unsigned char *blk, int len); +void des_encrypt_xdmauth(const unsigned char *key, + unsigned char *blk, int len); +void des_decrypt_xdmauth(const unsigned char *key, + unsigned char *blk, int len); + +void openssh_bcrypt(const char *passphrase, + const unsigned char *salt, int saltbytes, + int rounds, unsigned char *out, int outbytes); /* * For progress updates in the key generation utility. @@ -548,8 +813,13 @@ int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, void *pfnparam); int dsa_generate(struct dss_key *key, int bits, progfn_t pfn, void *pfnparam); +int ec_generate(struct ec_key *key, int bits, progfn_t pfn, + void *pfnparam); +int ec_edgenerate(struct ec_key *key, int bits, progfn_t pfn, + void *pfnparam); Bignum primegen(int bits, int modulus, int residue, Bignum factor, - int phase, progfn_t pfn, void *pfnparam); + int phase, progfn_t pfn, void *pfnparam, unsigned firstbits); +void invent_firstbits(unsigned *one, unsigned *two); /* @@ -564,6 +834,132 @@ int zlib_compress_block(void *, unsigned char *block, int len, int zlib_decompress_block(void *, unsigned char *block, int len, unsigned char **outblock, int *outlen); +/* + * Connection-sharing API provided by platforms. This function must + * either: + * - return SHARE_NONE and do nothing + * - return SHARE_DOWNSTREAM and set *sock to a Socket connected to + * downplug + * - return SHARE_UPSTREAM and set *sock to a Socket connected to + * upplug. + */ +enum { SHARE_NONE, SHARE_DOWNSTREAM, SHARE_UPSTREAM }; +int platform_ssh_share(const char *name, Conf *conf, + Plug downplug, Plug upplug, Socket *sock, + char **logtext, char **ds_err, char **us_err, + int can_upstream, int can_downstream); +void platform_ssh_share_cleanup(const char *name); + +/* + * SSH-1 message type codes. + */ +#define SSH1_MSG_DISCONNECT 1 /* 0x1 */ +#define SSH1_SMSG_PUBLIC_KEY 2 /* 0x2 */ +#define SSH1_CMSG_SESSION_KEY 3 /* 0x3 */ +#define SSH1_CMSG_USER 4 /* 0x4 */ +#define SSH1_CMSG_AUTH_RSA 6 /* 0x6 */ +#define SSH1_SMSG_AUTH_RSA_CHALLENGE 7 /* 0x7 */ +#define SSH1_CMSG_AUTH_RSA_RESPONSE 8 /* 0x8 */ +#define SSH1_CMSG_AUTH_PASSWORD 9 /* 0x9 */ +#define SSH1_CMSG_REQUEST_PTY 10 /* 0xa */ +#define SSH1_CMSG_WINDOW_SIZE 11 /* 0xb */ +#define SSH1_CMSG_EXEC_SHELL 12 /* 0xc */ +#define SSH1_CMSG_EXEC_CMD 13 /* 0xd */ +#define SSH1_SMSG_SUCCESS 14 /* 0xe */ +#define SSH1_SMSG_FAILURE 15 /* 0xf */ +#define SSH1_CMSG_STDIN_DATA 16 /* 0x10 */ +#define SSH1_SMSG_STDOUT_DATA 17 /* 0x11 */ +#define SSH1_SMSG_STDERR_DATA 18 /* 0x12 */ +#define SSH1_CMSG_EOF 19 /* 0x13 */ +#define SSH1_SMSG_EXIT_STATUS 20 /* 0x14 */ +#define SSH1_MSG_CHANNEL_OPEN_CONFIRMATION 21 /* 0x15 */ +#define SSH1_MSG_CHANNEL_OPEN_FAILURE 22 /* 0x16 */ +#define SSH1_MSG_CHANNEL_DATA 23 /* 0x17 */ +#define SSH1_MSG_CHANNEL_CLOSE 24 /* 0x18 */ +#define SSH1_MSG_CHANNEL_CLOSE_CONFIRMATION 25 /* 0x19 */ +#define SSH1_SMSG_X11_OPEN 27 /* 0x1b */ +#define SSH1_CMSG_PORT_FORWARD_REQUEST 28 /* 0x1c */ +#define SSH1_MSG_PORT_OPEN 29 /* 0x1d */ +#define SSH1_CMSG_AGENT_REQUEST_FORWARDING 30 /* 0x1e */ +#define SSH1_SMSG_AGENT_OPEN 31 /* 0x1f */ +#define SSH1_MSG_IGNORE 32 /* 0x20 */ +#define SSH1_CMSG_EXIT_CONFIRMATION 33 /* 0x21 */ +#define SSH1_CMSG_X11_REQUEST_FORWARDING 34 /* 0x22 */ +#define SSH1_CMSG_AUTH_RHOSTS_RSA 35 /* 0x23 */ +#define SSH1_MSG_DEBUG 36 /* 0x24 */ +#define SSH1_CMSG_REQUEST_COMPRESSION 37 /* 0x25 */ +#define SSH1_CMSG_AUTH_TIS 39 /* 0x27 */ +#define SSH1_SMSG_AUTH_TIS_CHALLENGE 40 /* 0x28 */ +#define SSH1_CMSG_AUTH_TIS_RESPONSE 41 /* 0x29 */ +#define SSH1_CMSG_AUTH_CCARD 70 /* 0x46 */ +#define SSH1_SMSG_AUTH_CCARD_CHALLENGE 71 /* 0x47 */ +#define SSH1_CMSG_AUTH_CCARD_RESPONSE 72 /* 0x48 */ + +#define SSH1_AUTH_RHOSTS 1 /* 0x1 */ +#define SSH1_AUTH_RSA 2 /* 0x2 */ +#define SSH1_AUTH_PASSWORD 3 /* 0x3 */ +#define SSH1_AUTH_RHOSTS_RSA 4 /* 0x4 */ +#define SSH1_AUTH_TIS 5 /* 0x5 */ +#define SSH1_AUTH_CCARD 16 /* 0x10 */ + +#define SSH1_PROTOFLAG_SCREEN_NUMBER 1 /* 0x1 */ +/* Mask for protoflags we will echo back to server if seen */ +#define SSH1_PROTOFLAGS_SUPPORTED 0 /* 0x1 */ + +/* + * SSH-2 message type codes. + */ +#define SSH2_MSG_DISCONNECT 1 /* 0x1 */ +#define SSH2_MSG_IGNORE 2 /* 0x2 */ +#define SSH2_MSG_UNIMPLEMENTED 3 /* 0x3 */ +#define SSH2_MSG_DEBUG 4 /* 0x4 */ +#define SSH2_MSG_SERVICE_REQUEST 5 /* 0x5 */ +#define SSH2_MSG_SERVICE_ACCEPT 6 /* 0x6 */ +#define SSH2_MSG_KEXINIT 20 /* 0x14 */ +#define SSH2_MSG_NEWKEYS 21 /* 0x15 */ +#define SSH2_MSG_KEXDH_INIT 30 /* 0x1e */ +#define SSH2_MSG_KEXDH_REPLY 31 /* 0x1f */ +#define SSH2_MSG_KEX_DH_GEX_REQUEST_OLD 30 /* 0x1e */ +#define SSH2_MSG_KEX_DH_GEX_REQUEST 34 /* 0x22 */ +#define SSH2_MSG_KEX_DH_GEX_GROUP 31 /* 0x1f */ +#define SSH2_MSG_KEX_DH_GEX_INIT 32 /* 0x20 */ +#define SSH2_MSG_KEX_DH_GEX_REPLY 33 /* 0x21 */ +#define SSH2_MSG_KEXRSA_PUBKEY 30 /* 0x1e */ +#define SSH2_MSG_KEXRSA_SECRET 31 /* 0x1f */ +#define SSH2_MSG_KEXRSA_DONE 32 /* 0x20 */ +#define SSH2_MSG_KEX_ECDH_INIT 30 /* 0x1e */ +#define SSH2_MSG_KEX_ECDH_REPLY 31 /* 0x1f */ +#define SSH2_MSG_KEX_ECMQV_INIT 30 /* 0x1e */ +#define SSH2_MSG_KEX_ECMQV_REPLY 31 /* 0x1f */ +#define SSH2_MSG_USERAUTH_REQUEST 50 /* 0x32 */ +#define SSH2_MSG_USERAUTH_FAILURE 51 /* 0x33 */ +#define SSH2_MSG_USERAUTH_SUCCESS 52 /* 0x34 */ +#define SSH2_MSG_USERAUTH_BANNER 53 /* 0x35 */ +#define SSH2_MSG_USERAUTH_PK_OK 60 /* 0x3c */ +#define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ 60 /* 0x3c */ +#define SSH2_MSG_USERAUTH_INFO_REQUEST 60 /* 0x3c */ +#define SSH2_MSG_USERAUTH_INFO_RESPONSE 61 /* 0x3d */ +#define SSH2_MSG_GLOBAL_REQUEST 80 /* 0x50 */ +#define SSH2_MSG_REQUEST_SUCCESS 81 /* 0x51 */ +#define SSH2_MSG_REQUEST_FAILURE 82 /* 0x52 */ +#define SSH2_MSG_CHANNEL_OPEN 90 /* 0x5a */ +#define SSH2_MSG_CHANNEL_OPEN_CONFIRMATION 91 /* 0x5b */ +#define SSH2_MSG_CHANNEL_OPEN_FAILURE 92 /* 0x5c */ +#define SSH2_MSG_CHANNEL_WINDOW_ADJUST 93 /* 0x5d */ +#define SSH2_MSG_CHANNEL_DATA 94 /* 0x5e */ +#define SSH2_MSG_CHANNEL_EXTENDED_DATA 95 /* 0x5f */ +#define SSH2_MSG_CHANNEL_EOF 96 /* 0x60 */ +#define SSH2_MSG_CHANNEL_CLOSE 97 /* 0x61 */ +#define SSH2_MSG_CHANNEL_REQUEST 98 /* 0x62 */ +#define SSH2_MSG_CHANNEL_SUCCESS 99 /* 0x63 */ +#define SSH2_MSG_CHANNEL_FAILURE 100 /* 0x64 */ +#define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60 +#define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61 +#define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63 +#define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64 +#define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65 +#define SSH2_MSG_USERAUTH_GSSAPI_MIC 66 + /* * SSH-1 agent messages. */ @@ -592,6 +988,32 @@ int zlib_decompress_block(void *, unsigned char *block, int len, #define SSH2_AGENTC_REMOVE_IDENTITY 18 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19 +/* + * Assorted other SSH-related enumerations. + */ +#define SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1 /* 0x1 */ +#define SSH2_DISCONNECT_PROTOCOL_ERROR 2 /* 0x2 */ +#define SSH2_DISCONNECT_KEY_EXCHANGE_FAILED 3 /* 0x3 */ +#define SSH2_DISCONNECT_HOST_AUTHENTICATION_FAILED 4 /* 0x4 */ +#define SSH2_DISCONNECT_MAC_ERROR 5 /* 0x5 */ +#define SSH2_DISCONNECT_COMPRESSION_ERROR 6 /* 0x6 */ +#define SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE 7 /* 0x7 */ +#define SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED 8 /* 0x8 */ +#define SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE 9 /* 0x9 */ +#define SSH2_DISCONNECT_CONNECTION_LOST 10 /* 0xa */ +#define SSH2_DISCONNECT_BY_APPLICATION 11 /* 0xb */ +#define SSH2_DISCONNECT_TOO_MANY_CONNECTIONS 12 /* 0xc */ +#define SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER 13 /* 0xd */ +#define SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE 14 /* 0xe */ +#define SSH2_DISCONNECT_ILLEGAL_USER_NAME 15 /* 0xf */ + +#define SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED 1 /* 0x1 */ +#define SSH2_OPEN_CONNECT_FAILED 2 /* 0x2 */ +#define SSH2_OPEN_UNKNOWN_CHANNEL_TYPE 3 /* 0x3 */ +#define SSH2_OPEN_RESOURCE_SHORTAGE 4 /* 0x4 */ + +#define SSH2_EXTENDED_DATA_STDERR 1 /* 0x1 */ + /* * Need this to warn about support for the original SSH-2 keyfile * format.