X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/5c58ad2d1527936b4d30891497eef48bde0fe1f3..3d88e64dfcf5dc0fd361ce0c504c67a9196ce44c:/pageant.c diff --git a/pageant.c b/pageant.c index d7bd94cf..41ae837e 100644 --- a/pageant.c +++ b/pageant.c @@ -3,10 +3,20 @@ */ #include -#include /* FIXME */ -#include "putty.h" /* FIXME */ +#ifndef NO_SECURITY +#include +#endif +#include +#include +#include +#include +#include + +#include "putty.h" #include "ssh.h" +#include "misc.h" #include "tree234.h" +#include "winstuff.h" #define IDI_MAINICON 200 #define IDI_TRAYICON 201 @@ -14,51 +24,118 @@ #define WM_XUSER (WM_USER + 0x2000) #define WM_SYSTRAY (WM_XUSER + 6) #define WM_SYSTRAY2 (WM_XUSER + 7) -#define WM_CLOSEMEM (WM_XUSER + 10) + +#define AGENT_COPYDATA_ID 0x804e50ba /* random goop */ + +/* + * FIXME: maybe some day we can sort this out ... + */ +#define AGENT_MAX_MSGLEN 8192 #define IDM_CLOSE 0x0010 #define IDM_VIEWKEYS 0x0020 +#define IDM_ADDKEY 0x0030 +#define IDM_HELP 0x0040 +#define IDM_ABOUT 0x0050 #define APPNAME "Pageant" -#define MAILSLOTNAME "\\\\.\\mailslot\\pageant_listener" +extern char ver[]; -#define SSH_AGENTC_REQUEST_RSA_IDENTITIES 1 -#define SSH_AGENT_RSA_IDENTITIES_ANSWER 2 -#define SSH_AGENTC_RSA_CHALLENGE 3 -#define SSH_AGENT_RSA_RESPONSE 4 -#define SSH_AGENT_FAILURE 5 -#define SSH_AGENT_SUCCESS 6 -#define SSH_AGENTC_ADD_RSA_IDENTITY 7 -#define SSH_AGENTC_REMOVE_RSA_IDENTITY 8 +static HINSTANCE instance; +static HWND main_hwnd; +static HWND keylist; +static HWND aboutbox; +static HMENU systray_menu, session_menu; +static int already_running; +static int requested_help; -HINSTANCE instance; -HWND hwnd; -HWND keylist; -HMENU systray_menu; +static char *help_path; +static char *putty_path; -tree234 *rsakeys; +#define IDM_PUTTY 0x0060 +#define IDM_SESSIONS_BASE 0x1000 +#define IDM_SESSIONS_MAX 0x2000 +#define PUTTY_REGKEY "Software\\SimonTatham\\PuTTY\\Sessions" +#define PUTTY_DEFAULT "Default%20Settings" +static int initial_menuitems_count; /* - * We need this to link with the RSA code, because rsaencrypt() - * pads its data with random bytes. Since we only use rsadecrypt(), - * which is deterministic, this should never be called. - * - * If it _is_ called, there is a _serious_ problem, because it - * won't generate true random numbers. So we must scream, panic, - * and exit immediately if that should happen. + * Print a modal (Really Bad) message box and perform a fatal exit. */ -int random_byte(void) { - MessageBox(hwnd, "Internal Error", APPNAME, MB_OK | MB_ICONERROR); - exit(0); +void modalfatalbox(char *fmt, ...) +{ + va_list ap; + char *buf; + + va_start(ap, fmt); + buf = dupvprintf(fmt, ap); + va_end(ap); + MessageBox(main_hwnd, buf, "Pageant Fatal Error", + MB_SYSTEMMODAL | MB_ICONERROR | MB_OK); + sfree(buf); + exit(1); +} + +/* Un-munge session names out of the registry. */ +static void unmungestr(char *in, char *out, int outlen) +{ + while (*in) { + if (*in == '%' && in[1] && in[2]) { + int i, j; + + i = in[1] - '0'; + i -= (i > 9 ? 7 : 0); + j = in[2] - '0'; + j -= (j > 9 ? 7 : 0); + + *out++ = (i << 4) + j; + if (!--outlen) + return; + in += 3; + } else { + *out++ = *in++; + if (!--outlen) + return; + } + } + *out = '\0'; + return; } +static tree234 *rsakeys, *ssh2keys; + +static int has_security; +#ifndef NO_SECURITY +typedef DWORD(WINAPI * gsi_fn_t) + (HANDLE, SE_OBJECT_TYPE, SECURITY_INFORMATION, + PSID *, PSID *, PACL *, PACL *, PSECURITY_DESCRIPTOR *); +static gsi_fn_t getsecurityinfo; +#endif + /* - * This function is needed to link with the DES code. We need not - * have it do anything at all. + * Exports from pageantc.c */ -void logevent(char *msg) { -} +void agent_query(void *in, int inlen, void **out, int *outlen); +int agent_exists(void); + +/* + * Forward references + */ +static void *make_keylist1(int *length); +static void *make_keylist2(int *length); +static void *get_keylist1(void); +static void *get_keylist2(void); + +/* + * Blob structure for passing to the asymmetric SSH2 key compare + * function, prototyped here. + */ +struct blob { + unsigned char *blob; + int len; +}; +static int cmpkeys_ssh2_asymm(void *av, void *bv); #define GET_32BIT(cp) \ (((unsigned long)(unsigned char)(cp)[0] << 24) | \ @@ -74,97 +151,633 @@ void logevent(char *msg) { #define PASSPHRASE_MAXLEN 512 +struct PassphraseProcStruct { + char *passphrase; + char *comment; +}; + +static tree234 *passphrases = NULL; + +/* + * After processing a list of filenames, we want to forget the + * passphrases. + */ +static void forget_passphrases(void) +{ + while (count234(passphrases) > 0) { + char *pp = index234(passphrases, 0); + memset(pp, 0, strlen(pp)); + delpos234(passphrases, 0); + free(pp); + } +} + +/* + * Dialog-box function for the Licence box. + */ +static int CALLBACK LicenceProc(HWND hwnd, UINT msg, + WPARAM wParam, LPARAM lParam) +{ + switch (msg) { + case WM_INITDIALOG: + return 1; + case WM_COMMAND: + switch (LOWORD(wParam)) { + case IDOK: + EndDialog(hwnd, 1); + return 0; + } + return 0; + case WM_CLOSE: + EndDialog(hwnd, 1); + return 0; + } + return 0; +} + +/* + * Dialog-box function for the About box. + */ +static int CALLBACK AboutProc(HWND hwnd, UINT msg, + WPARAM wParam, LPARAM lParam) +{ + switch (msg) { + case WM_INITDIALOG: + SetDlgItemText(hwnd, 100, ver); + return 1; + case WM_COMMAND: + switch (LOWORD(wParam)) { + case IDOK: + aboutbox = NULL; + DestroyWindow(hwnd); + return 0; + case 101: + EnableWindow(hwnd, 0); + DialogBox(instance, MAKEINTRESOURCE(214), hwnd, LicenceProc); + EnableWindow(hwnd, 1); + SetActiveWindow(hwnd); + return 0; + } + return 0; + case WM_CLOSE: + aboutbox = NULL; + DestroyWindow(hwnd); + return 0; + } + return 0; +} + +static HWND passphrase_box; + /* * Dialog-box function for the passphrase box. */ static int CALLBACK PassphraseProc(HWND hwnd, UINT msg, - WPARAM wParam, LPARAM lParam) { - static char *passphrase; + WPARAM wParam, LPARAM lParam) +{ + static char *passphrase = NULL; + struct PassphraseProcStruct *p; switch (msg) { case WM_INITDIALOG: - passphrase = (char *)lParam; - *passphrase = 0; - return 0; + passphrase_box = hwnd; + /* + * Centre the window. + */ + { /* centre the window */ + RECT rs, rd; + HWND hw; + + hw = GetDesktopWindow(); + if (GetWindowRect(hw, &rs) && GetWindowRect(hwnd, &rd)) + MoveWindow(hwnd, + (rs.right + rs.left + rd.left - rd.right) / 2, + (rs.bottom + rs.top + rd.top - rd.bottom) / 2, + rd.right - rd.left, rd.bottom - rd.top, TRUE); + } + + SetForegroundWindow(hwnd); + SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0, + SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW); + p = (struct PassphraseProcStruct *) lParam; + passphrase = p->passphrase; + if (p->comment) + SetDlgItemText(hwnd, 101, p->comment); + *passphrase = 0; + SetDlgItemText(hwnd, 102, passphrase); + return 0; case WM_COMMAND: switch (LOWORD(wParam)) { case IDOK: if (*passphrase) - EndDialog (hwnd, 1); + EndDialog(hwnd, 1); else - MessageBeep (0); + MessageBeep(0); return 0; case IDCANCEL: - EndDialog (hwnd, 0); + EndDialog(hwnd, 0); + return 0; + case 102: /* edit box */ + if ((HIWORD(wParam) == EN_CHANGE) && passphrase) { + GetDlgItemText(hwnd, 102, passphrase, + PASSPHRASE_MAXLEN - 1); + passphrase[PASSPHRASE_MAXLEN - 1] = '\0'; + } return 0; - case 102: /* edit box */ - if (HIWORD(wParam) == EN_CHANGE) { - GetDlgItemText (hwnd, 102, passphrase, PASSPHRASE_MAXLEN-1); - passphrase[PASSPHRASE_MAXLEN-1] = '\0'; - } - return 0; } return 0; case WM_CLOSE: - EndDialog (hwnd, 0); + EndDialog(hwnd, 0); return 0; } return 0; } /* + * Warn about the obsolescent key file format. + */ +void old_keyfile_warning(void) +{ + static const char mbtitle[] = "PuTTY Key File Warning"; + static const char message[] = + "You are loading an SSH 2 private key which has an\n" + "old version of the file format. This means your key\n" + "file is not fully tamperproof. Future versions of\n" + "PuTTY may stop supporting this private key format,\n" + "so we recommend you convert your key to the new\n" + "format.\n" + "\n" + "You can perform this conversion by loading the key\n" + "into PuTTYgen and then saving it again."; + + MessageBox(NULL, message, mbtitle, MB_OK); +} + +/* + * Update the visible key list. + */ +static void keylist_update(void) +{ + struct RSAKey *rkey; + struct ssh2_userkey *skey; + int i; + + if (keylist) { + SendDlgItemMessage(keylist, 100, LB_RESETCONTENT, 0, 0); + for (i = 0; NULL != (rkey = index234(rsakeys, i)); i++) { + char listentry[512], *p; + /* + * Replace two spaces in the fingerprint with tabs, for + * nice alignment in the box. + */ + strcpy(listentry, "ssh1\t"); + p = listentry + strlen(listentry); + rsa_fingerprint(p, sizeof(listentry) - (p - listentry), rkey); + p = strchr(listentry, ' '); + if (p) + *p = '\t'; + p = strchr(listentry, ' '); + if (p) + *p = '\t'; + SendDlgItemMessage(keylist, 100, LB_ADDSTRING, + 0, (LPARAM) listentry); + } + for (i = 0; NULL != (skey = index234(ssh2keys, i)); i++) { + char listentry[512], *p; + int len; + /* + * Replace two spaces in the fingerprint with tabs, for + * nice alignment in the box. + */ + p = skey->alg->fingerprint(skey->data); + strncpy(listentry, p, sizeof(listentry)); + p = strchr(listentry, ' '); + if (p) + *p = '\t'; + p = strchr(listentry, ' '); + if (p) + *p = '\t'; + len = strlen(listentry); + if (len < sizeof(listentry) - 2) { + listentry[len] = '\t'; + strncpy(listentry + len + 1, skey->comment, + sizeof(listentry) - len - 1); + } + SendDlgItemMessage(keylist, 100, LB_ADDSTRING, 0, + (LPARAM) listentry); + } + SendDlgItemMessage(keylist, 100, LB_SETCURSEL, (WPARAM) - 1, 0); + } +} + +/* * This function loads a key from a file and adds it. */ -void add_keyfile(char *filename) { +static void add_keyfile(Filename filename) +{ char passphrase[PASSPHRASE_MAXLEN]; - struct RSAKey *key; + struct RSAKey *rkey = NULL; + struct ssh2_userkey *skey = NULL; int needs_pass; int ret; int attempts; + char *comment; + struct PassphraseProcStruct pps; + int type; + int original_pass; + + type = key_type(&filename); + if (type != SSH_KEYTYPE_SSH1 && type != SSH_KEYTYPE_SSH2) { + char msg[256]; + sprintf(msg, "Couldn't load this key (%s)", key_type_to_str(type)); + MessageBox(NULL, msg, APPNAME, MB_OK | MB_ICONERROR); + return; + } + + /* + * See if the key is already loaded (in the primary Pageant, + * which may or may not be us). + */ + { + void *blob; + unsigned char *keylist, *p; + int i, nkeys, bloblen; + + if (type == SSH_KEYTYPE_SSH1) { + if (!rsakey_pubblob(&filename, &blob, &bloblen)) { + MessageBox(NULL, "Couldn't load private key.", APPNAME, + MB_OK | MB_ICONERROR); + return; + } + keylist = get_keylist1(); + } else { + unsigned char *blob2; + blob = ssh2_userkey_loadpub(&filename, NULL, &bloblen); + if (!blob) { + MessageBox(NULL, "Couldn't load private key.", APPNAME, + MB_OK | MB_ICONERROR); + return; + } + /* For our purposes we want the blob prefixed with its length */ + blob2 = snewn(bloblen+4, unsigned char); + PUT_32BIT(blob2, bloblen); + memcpy(blob2 + 4, blob, bloblen); + sfree(blob); + blob = blob2; + + keylist = get_keylist2(); + } + if (keylist) { + nkeys = GET_32BIT(keylist); + p = keylist + 4; + + for (i = 0; i < nkeys; i++) { + if (!memcmp(blob, p, bloblen)) { + /* Key is already present; we can now leave. */ + sfree(keylist); + sfree(blob); + return; + } + /* Now skip over public blob */ + if (type == SSH_KEYTYPE_SSH1) + p += rsa_public_blob_len(p); + else + p += 4 + GET_32BIT(p); + /* Now skip over comment field */ + p += 4 + GET_32BIT(p); + } + + sfree(keylist); + } + + sfree(blob); + } - needs_pass = rsakey_encrypted(filename); + if (type == SSH_KEYTYPE_SSH1) + needs_pass = rsakey_encrypted(&filename, &comment); + else + needs_pass = ssh2_userkey_encrypted(&filename, &comment); attempts = 0; - key = malloc(sizeof(*key)); + if (type == SSH_KEYTYPE_SSH1) + rkey = snew(struct RSAKey); + pps.passphrase = passphrase; + pps.comment = comment; + original_pass = 0; do { - if (needs_pass) { - int dlgret; - dlgret = DialogBoxParam(instance, MAKEINTRESOURCE(210), - NULL, PassphraseProc, - (LPARAM)passphrase); - if (!dlgret) { - free(key); - return; /* operation cancelled */ - } - } else - *passphrase = '\0'; - ret = loadrsakey(filename, key, passphrase); - attempts++; + if (needs_pass) { + /* try all the remembered passphrases first */ + char *pp = index234(passphrases, attempts); + if(pp) { + strcpy(passphrase, pp); + } else { + int dlgret; + original_pass = 1; + dlgret = DialogBoxParam(instance, MAKEINTRESOURCE(210), + NULL, PassphraseProc, (LPARAM) & pps); + passphrase_box = NULL; + if (!dlgret) { + if (comment) + sfree(comment); + if (type == SSH_KEYTYPE_SSH1) + sfree(rkey); + return; /* operation cancelled */ + } + } + } else + *passphrase = '\0'; + if (type == SSH_KEYTYPE_SSH1) + ret = loadrsakey(&filename, rkey, passphrase); + else { + skey = ssh2_load_userkey(&filename, passphrase); + if (skey == SSH2_WRONG_PASSPHRASE) + ret = -1; + else if (!skey) + ret = 0; + else + ret = 1; + } + attempts++; } while (ret == -1); + + /* if they typed in an ok passphrase, remember it */ + if(original_pass && ret) { + char *pp = dupstr(passphrase); + addpos234(passphrases, pp, 0); + } + + if (comment) + sfree(comment); if (ret == 0) { - MessageBox(NULL, "Couldn't load public key.", APPNAME, - MB_OK | MB_ICONERROR); - free(key); - return; + MessageBox(NULL, "Couldn't load private key.", APPNAME, + MB_OK | MB_ICONERROR); + if (type == SSH_KEYTYPE_SSH1) + sfree(rkey); + return; + } + if (type == SSH_KEYTYPE_SSH1) { + if (already_running) { + unsigned char *request, *response; + void *vresponse; + int reqlen, clen, resplen; + + clen = strlen(rkey->comment); + + reqlen = 4 + 1 + /* length, message type */ + 4 + /* bit count */ + ssh1_bignum_length(rkey->modulus) + + ssh1_bignum_length(rkey->exponent) + + ssh1_bignum_length(rkey->private_exponent) + + ssh1_bignum_length(rkey->iqmp) + + ssh1_bignum_length(rkey->p) + + ssh1_bignum_length(rkey->q) + 4 + clen /* comment */ + ; + + request = snewn(reqlen, unsigned char); + + request[4] = SSH1_AGENTC_ADD_RSA_IDENTITY; + reqlen = 5; + PUT_32BIT(request + reqlen, bignum_bitcount(rkey->modulus)); + reqlen += 4; + reqlen += ssh1_write_bignum(request + reqlen, rkey->modulus); + reqlen += ssh1_write_bignum(request + reqlen, rkey->exponent); + reqlen += + ssh1_write_bignum(request + reqlen, + rkey->private_exponent); + reqlen += ssh1_write_bignum(request + reqlen, rkey->iqmp); + reqlen += ssh1_write_bignum(request + reqlen, rkey->p); + reqlen += ssh1_write_bignum(request + reqlen, rkey->q); + PUT_32BIT(request + reqlen, clen); + memcpy(request + reqlen + 4, rkey->comment, clen); + reqlen += 4 + clen; + PUT_32BIT(request, reqlen - 4); + + agent_query(request, reqlen, &vresponse, &resplen); + response = vresponse; + if (resplen < 5 || response[4] != SSH_AGENT_SUCCESS) + MessageBox(NULL, "The already running Pageant " + "refused to add the key.", APPNAME, + MB_OK | MB_ICONERROR); + + sfree(request); + sfree(response); + } else { + if (add234(rsakeys, rkey) != rkey) + sfree(rkey); /* already present, don't waste RAM */ + } + } else { + if (already_running) { + unsigned char *request, *response; + void *vresponse; + int reqlen, alglen, clen, keybloblen, resplen; + alglen = strlen(skey->alg->name); + clen = strlen(skey->comment); + + keybloblen = skey->alg->openssh_fmtkey(skey->data, NULL, 0); + + reqlen = 4 + 1 + /* length, message type */ + 4 + alglen + /* algorithm name */ + keybloblen + /* key data */ + 4 + clen /* comment */ + ; + + request = snewn(reqlen, unsigned char); + + request[4] = SSH2_AGENTC_ADD_IDENTITY; + reqlen = 5; + PUT_32BIT(request + reqlen, alglen); + reqlen += 4; + memcpy(request + reqlen, skey->alg->name, alglen); + reqlen += alglen; + reqlen += skey->alg->openssh_fmtkey(skey->data, + request + reqlen, + keybloblen); + PUT_32BIT(request + reqlen, clen); + memcpy(request + reqlen + 4, skey->comment, clen); + PUT_32BIT(request, reqlen - 4); + reqlen += clen + 4; + + agent_query(request, reqlen, &vresponse, &resplen); + response = vresponse; + if (resplen < 5 || response[4] != SSH_AGENT_SUCCESS) + MessageBox(NULL, "The already running Pageant " + "refused to add the key.", APPNAME, + MB_OK | MB_ICONERROR); + + sfree(request); + sfree(response); + } else { + if (add234(ssh2keys, skey) != skey) { + skey->alg->freekey(skey->data); + sfree(skey); /* already present, don't waste RAM */ + } + } } - if (add234(rsakeys, key) != key) - free(key); /* already present, don't waste RAM */ } /* - * This is the main agent function that answers messages. + * Create an SSH1 key list in a malloc'ed buffer; return its + * length. */ -void answer_msg(void *in, int inlen, void **out, int *outlen) { - unsigned char *ret; - unsigned char *p = in; - int type; +static void *make_keylist1(int *length) +{ + int i, nkeys, len; + struct RSAKey *key; + unsigned char *blob, *p, *ret; + int bloblen; + + /* + * Count up the number and length of keys we hold. + */ + len = 4; + nkeys = 0; + for (i = 0; NULL != (key = index234(rsakeys, i)); i++) { + nkeys++; + blob = rsa_public_blob(key, &bloblen); + len += bloblen; + sfree(blob); + len += 4 + strlen(key->comment); + } + + /* Allocate the buffer. */ + p = ret = snewn(len, unsigned char); + if (length) *length = len; - *out = NULL; /* default `no go' response */ + PUT_32BIT(p, nkeys); + p += 4; + for (i = 0; NULL != (key = index234(rsakeys, i)); i++) { + blob = rsa_public_blob(key, &bloblen); + memcpy(p, blob, bloblen); + p += bloblen; + sfree(blob); + PUT_32BIT(p, strlen(key->comment)); + memcpy(p + 4, key->comment, strlen(key->comment)); + p += 4 + strlen(key->comment); + } + + assert(p - ret == len); + return ret; +} + +/* + * Create an SSH2 key list in a malloc'ed buffer; return its + * length. + */ +static void *make_keylist2(int *length) +{ + struct ssh2_userkey *key; + int i, len, nkeys; + unsigned char *blob, *p, *ret; + int bloblen; /* - * Basic sanity checks. len >= 5, and len[0:4] holds len-4. + * Count up the number and length of keys we hold. */ - if (inlen < 5 || GET_32BIT(p) != (unsigned long)(inlen-4)) - return; + len = 4; + nkeys = 0; + for (i = 0; NULL != (key = index234(ssh2keys, i)); i++) { + nkeys++; + len += 4; /* length field */ + blob = key->alg->public_blob(key->data, &bloblen); + len += bloblen; + sfree(blob); + len += 4 + strlen(key->comment); + } + + /* Allocate the buffer. */ + p = ret = snewn(len, unsigned char); + if (length) *length = len; + + /* + * Packet header is the obvious five bytes, plus four + * bytes for the key count. + */ + PUT_32BIT(p, nkeys); + p += 4; + for (i = 0; NULL != (key = index234(ssh2keys, i)); i++) { + blob = key->alg->public_blob(key->data, &bloblen); + PUT_32BIT(p, bloblen); + p += 4; + memcpy(p, blob, bloblen); + p += bloblen; + sfree(blob); + PUT_32BIT(p, strlen(key->comment)); + memcpy(p + 4, key->comment, strlen(key->comment)); + p += 4 + strlen(key->comment); + } + + assert(p - ret == len); + return ret; +} + +/* + * Acquire a keylist1 from the primary Pageant; this means either + * calling make_keylist1 (if that's us) or sending a message to the + * primary Pageant (if it's not). + */ +static void *get_keylist1(void) +{ + void *ret; + + if (already_running) { + unsigned char request[5], *response; + void *vresponse; + int resplen; + request[4] = SSH1_AGENTC_REQUEST_RSA_IDENTITIES; + PUT_32BIT(request, 4); + + agent_query(request, 5, &vresponse, &resplen); + response = vresponse; + if (resplen < 5 || response[4] != SSH1_AGENT_RSA_IDENTITIES_ANSWER) + return NULL; + + ret = snewn(resplen-5, unsigned char); + memcpy(ret, response+5, resplen-5); + sfree(response); + } else { + ret = make_keylist1(NULL); + } + return ret; +} + +/* + * Acquire a keylist2 from the primary Pageant; this means either + * calling make_keylist2 (if that's us) or sending a message to the + * primary Pageant (if it's not). + */ +static void *get_keylist2(void) +{ + void *ret; + + if (already_running) { + unsigned char request[5], *response; + void *vresponse; + int resplen; + + request[4] = SSH2_AGENTC_REQUEST_IDENTITIES; + PUT_32BIT(request, 4); + + agent_query(request, 5, &vresponse, &resplen); + response = vresponse; + if (resplen < 5 || response[4] != SSH2_AGENT_IDENTITIES_ANSWER) + return NULL; + + ret = snewn(resplen-5, unsigned char); + memcpy(ret, response+5, resplen-5); + sfree(response); + } else { + ret = make_keylist2(NULL); + } + return ret; +} + +/* + * This is the main agent function that answers messages. + */ +static void answer_msg(void *msg) +{ + unsigned char *p = msg; + unsigned char *ret = msg; + int type; /* * Get the message type. @@ -172,140 +785,324 @@ void answer_msg(void *in, int inlen, void **out, int *outlen) { type = p[4]; p += 5; - switch (type) { - case SSH_AGENTC_REQUEST_RSA_IDENTITIES: - /* - * Reply with SSH_AGENT_RSA_IDENTITIES_ANSWER. - */ - { - enum234 e; - struct RSAKey *key; - int len, nkeys; + case SSH1_AGENTC_REQUEST_RSA_IDENTITIES: + /* + * Reply with SSH1_AGENT_RSA_IDENTITIES_ANSWER. + */ + { + int len; + void *keylist; - /* - * Count up the number and length of keys we hold. - */ - len = nkeys = 0; - for (key = first234(rsakeys, &e); key; key = next234(&e)) { - nkeys++; - len += 4; /* length field */ - len += ssh1_bignum_length(key->exponent); - len += ssh1_bignum_length(key->modulus); - len += 4 + strlen(key->comment); - } + ret[4] = SSH1_AGENT_RSA_IDENTITIES_ANSWER; + keylist = make_keylist1(&len); + if (len + 5 > AGENT_MAX_MSGLEN) { + sfree(keylist); + goto failure; + } + PUT_32BIT(ret, len + 1); + memcpy(ret + 5, keylist, len); + sfree(keylist); + } + break; + case SSH2_AGENTC_REQUEST_IDENTITIES: + /* + * Reply with SSH2_AGENT_IDENTITIES_ANSWER. + */ + { + int len; + void *keylist; - /* - * Packet header is the obvious five bytes, plus four - * bytes for the key count. - */ - len += 5 + 4; - if ((ret = malloc(len)) != NULL) { - PUT_32BIT(ret, len-4); - ret[4] = SSH_AGENT_RSA_IDENTITIES_ANSWER; - PUT_32BIT(ret+5, nkeys); - p = ret + 5 + 4; - for (key = first234(rsakeys, &e); key; key = next234(&e)) { - PUT_32BIT(p, ssh1_bignum_bitcount(key->modulus)); - p += 4; - p += ssh1_write_bignum(p, key->exponent); - p += ssh1_write_bignum(p, key->modulus); - PUT_32BIT(p, strlen(key->comment)); - memcpy(p+4, key->comment, strlen(key->comment)); - p += 4 + strlen(key->comment); - } - } - } - break; - case SSH_AGENTC_RSA_CHALLENGE: - /* - * Reply with either SSH_AGENT_RSA_RESPONSE or - * SSH_AGENT_FAILURE, depending on whether we have that key - * or not. - */ - { - struct RSAKey reqkey, *key; - Bignum challenge, response; - unsigned char response_source[48], response_md5[16]; - struct MD5Context md5c; - int i, len; - - p += 4; - p += ssh1_read_bignum(p, &reqkey.exponent); - p += ssh1_read_bignum(p, &reqkey.modulus); - p += ssh1_read_bignum(p, &challenge); - memcpy(response_source+32, p, 16); p += 16; - if (GET_32BIT(p) != 1 || - (key = find234(rsakeys, &reqkey, NULL)) == NULL) { - freebn(reqkey.exponent); - freebn(reqkey.modulus); - freebn(challenge); - goto failure; - } - response = rsadecrypt(challenge, key); - for (i = 0; i < 32; i++) - response_source[i] = bignum_byte(response, 31-i); - - MD5Init(&md5c); - MD5Update(&md5c, response_source, 48); - MD5Final(response_md5, &md5c); - memset(response_source, 0, 48); /* burn the evidence */ - freebn(response); /* and that evidence */ - freebn(challenge); /* yes, and that evidence */ - freebn(reqkey.exponent); /* and free some memory ... */ - freebn(reqkey.modulus); /* ... while we're at it. */ + ret[4] = SSH2_AGENT_IDENTITIES_ANSWER; + keylist = make_keylist2(&len); + if (len + 5 > AGENT_MAX_MSGLEN) { + sfree(keylist); + goto failure; + } + PUT_32BIT(ret, len + 1); + memcpy(ret + 5, keylist, len); + sfree(keylist); + } + break; + case SSH1_AGENTC_RSA_CHALLENGE: + /* + * Reply with either SSH1_AGENT_RSA_RESPONSE or + * SSH_AGENT_FAILURE, depending on whether we have that key + * or not. + */ + { + struct RSAKey reqkey, *key; + Bignum challenge, response; + unsigned char response_source[48], response_md5[16]; + struct MD5Context md5c; + int i, len; - /* - * Packet is the obvious five byte header, plus sixteen - * bytes of MD5. - */ - len = 5 + 16; - if ((ret = malloc(len)) != NULL) { - PUT_32BIT(ret, len-4); - ret[4] = SSH_AGENT_RSA_RESPONSE; - memcpy(ret+5, response_md5, 16); - } - } - break; -#if 0 /* FIXME: implement these */ - case SSH_AGENTC_ADD_RSA_IDENTITY: - /* - * Add to the list and return SSH_AGENT_SUCCESS, or - * SSH_AGENT_FAILURE if the key was malformed. - */ - break; - case SSH_AGENTC_REMOVE_RSA_IDENTITY: - /* - * Remove from the list and return SSH_AGENT_SUCCESS, or - * perhaps SSH_AGENT_FAILURE if it wasn't in the list to - * start with. - */ - break; -#endif - default: - failure: - /* - * Unrecognised message. Return SSH_AGENT_FAILURE. - */ - if ((ret = malloc(5)) != NULL) { - PUT_32BIT(ret, 1); - ret[4] = SSH_AGENT_FAILURE; - } - break; - } + p += 4; + p += ssh1_read_bignum(p, &reqkey.exponent); + p += ssh1_read_bignum(p, &reqkey.modulus); + p += ssh1_read_bignum(p, &challenge); + memcpy(response_source + 32, p, 16); + p += 16; + if (GET_32BIT(p) != 1 || + (key = find234(rsakeys, &reqkey, NULL)) == NULL) { + freebn(reqkey.exponent); + freebn(reqkey.modulus); + freebn(challenge); + goto failure; + } + response = rsadecrypt(challenge, key); + for (i = 0; i < 32; i++) + response_source[i] = bignum_byte(response, 31 - i); + + MD5Init(&md5c); + MD5Update(&md5c, response_source, 48); + MD5Final(response_md5, &md5c); + memset(response_source, 0, 48); /* burn the evidence */ + freebn(response); /* and that evidence */ + freebn(challenge); /* yes, and that evidence */ + freebn(reqkey.exponent); /* and free some memory ... */ + freebn(reqkey.modulus); /* ... while we're at it. */ + + /* + * Packet is the obvious five byte header, plus sixteen + * bytes of MD5. + */ + len = 5 + 16; + PUT_32BIT(ret, len - 4); + ret[4] = SSH1_AGENT_RSA_RESPONSE; + memcpy(ret + 5, response_md5, 16); + } + break; + case SSH2_AGENTC_SIGN_REQUEST: + /* + * Reply with either SSH2_AGENT_SIGN_RESPONSE or + * SSH_AGENT_FAILURE, depending on whether we have that key + * or not. + */ + { + struct ssh2_userkey *key; + struct blob b; + unsigned char *data, *signature; + int datalen, siglen, len; + + b.len = GET_32BIT(p); + p += 4; + b.blob = p; + p += b.len; + datalen = GET_32BIT(p); + p += 4; + data = p; + key = find234(ssh2keys, &b, cmpkeys_ssh2_asymm); + if (!key) + goto failure; + signature = key->alg->sign(key->data, data, datalen, &siglen); + len = 5 + 4 + siglen; + PUT_32BIT(ret, len - 4); + ret[4] = SSH2_AGENT_SIGN_RESPONSE; + PUT_32BIT(ret + 5, siglen); + memcpy(ret + 5 + 4, signature, siglen); + sfree(signature); + } + break; + case SSH1_AGENTC_ADD_RSA_IDENTITY: + /* + * Add to the list and return SSH_AGENT_SUCCESS, or + * SSH_AGENT_FAILURE if the key was malformed. + */ + { + struct RSAKey *key; + char *comment; + int commentlen; + key = snew(struct RSAKey); + memset(key, 0, sizeof(struct RSAKey)); + p += makekey(p, key, NULL, 1); + p += makeprivate(p, key); + p += ssh1_read_bignum(p, &key->iqmp); /* p^-1 mod q */ + p += ssh1_read_bignum(p, &key->p); /* p */ + p += ssh1_read_bignum(p, &key->q); /* q */ + commentlen = GET_32BIT(p); + comment = snewn(commentlen+1, char); + if (comment) { + memcpy(comment, p + 4, commentlen); + comment[commentlen] = '\0'; + key->comment = comment; + } + PUT_32BIT(ret, 1); + ret[4] = SSH_AGENT_FAILURE; + if (add234(rsakeys, key) == key) { + keylist_update(); + ret[4] = SSH_AGENT_SUCCESS; + } else { + freersakey(key); + sfree(key); + } + } + break; + case SSH2_AGENTC_ADD_IDENTITY: + /* + * Add to the list and return SSH_AGENT_SUCCESS, or + * SSH_AGENT_FAILURE if the key was malformed. + */ + { + struct ssh2_userkey *key; + char *comment, *alg; + int alglen, commlen; + int bloblen; + + key = snew(struct ssh2_userkey); + + alglen = GET_32BIT(p); + p += 4; + alg = p; + p += alglen; + /* Add further algorithm names here. */ + if (alglen == 7 && !memcmp(alg, "ssh-rsa", 7)) + key->alg = &ssh_rsa; + else if (alglen == 7 && !memcmp(alg, "ssh-dss", 7)) + key->alg = &ssh_dss; + else { + sfree(key); + goto failure; + } - if (ret) { - *out = ret; - *outlen = 4 + GET_32BIT(ret); + bloblen = + GET_32BIT((unsigned char *) msg) - (p - + (unsigned char *) msg - + 4); + key->data = key->alg->openssh_createkey(&p, &bloblen); + if (!key->data) { + sfree(key); + goto failure; + } + commlen = GET_32BIT(p); + p += 4; + + comment = snewn(commlen + 1, char); + if (comment) { + memcpy(comment, p, commlen); + comment[commlen] = '\0'; + } + key->comment = comment; + + PUT_32BIT(ret, 1); + ret[4] = SSH_AGENT_FAILURE; + if (add234(ssh2keys, key) == key) { + keylist_update(); + ret[4] = SSH_AGENT_SUCCESS; + } else { + key->alg->freekey(key->data); + sfree(key->comment); + sfree(key); + } + } + break; + case SSH1_AGENTC_REMOVE_RSA_IDENTITY: + /* + * Remove from the list and return SSH_AGENT_SUCCESS, or + * perhaps SSH_AGENT_FAILURE if it wasn't in the list to + * start with. + */ + { + struct RSAKey reqkey, *key; + + p += makekey(p, &reqkey, NULL, 0); + key = find234(rsakeys, &reqkey, NULL); + freebn(reqkey.exponent); + freebn(reqkey.modulus); + PUT_32BIT(ret, 1); + ret[4] = SSH_AGENT_FAILURE; + if (key) { + del234(rsakeys, key); + keylist_update(); + freersakey(key); + sfree(key); + ret[4] = SSH_AGENT_SUCCESS; + } + } + break; + case SSH2_AGENTC_REMOVE_IDENTITY: + /* + * Remove from the list and return SSH_AGENT_SUCCESS, or + * perhaps SSH_AGENT_FAILURE if it wasn't in the list to + * start with. + */ + { + struct ssh2_userkey *key; + struct blob b; + + b.len = GET_32BIT(p); + p += 4; + b.blob = p; + p += b.len; + key = find234(ssh2keys, &b, cmpkeys_ssh2_asymm); + if (!key) + goto failure; + + PUT_32BIT(ret, 1); + ret[4] = SSH_AGENT_FAILURE; + if (key) { + del234(ssh2keys, key); + keylist_update(); + key->alg->freekey(key->data); + sfree(key); + ret[4] = SSH_AGENT_SUCCESS; + } + } + break; + case SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES: + /* + * Remove all SSH1 keys. Always returns success. + */ + { + struct RSAKey *rkey; + + while ((rkey = index234(rsakeys, 0)) != NULL) { + del234(rsakeys, rkey); + freersakey(rkey); + sfree(rkey); + } + keylist_update(); + + PUT_32BIT(ret, 1); + ret[4] = SSH_AGENT_SUCCESS; + } + break; + case SSH2_AGENTC_REMOVE_ALL_IDENTITIES: + /* + * Remove all SSH2 keys. Always returns success. + */ + { + struct ssh2_userkey *skey; + + while ((skey = index234(ssh2keys, 0)) != NULL) { + del234(ssh2keys, skey); + skey->alg->freekey(skey->data); + sfree(skey); + } + keylist_update(); + + PUT_32BIT(ret, 1); + ret[4] = SSH_AGENT_SUCCESS; + } + break; + default: + failure: + /* + * Unrecognised message. Return SSH_AGENT_FAILURE. + */ + PUT_32BIT(ret, 1); + ret[4] = SSH_AGENT_FAILURE; + break; } } /* * Key comparison function for the 2-3-4 tree of RSA keys. */ -int cmpkeys(void *av, void *bv) { - struct RSAKey *a = (struct RSAKey *)av; - struct RSAKey *b = (struct RSAKey *)bv; +static int cmpkeys_rsa(void *av, void *bv) +{ + struct RSAKey *a = (struct RSAKey *) av; + struct RSAKey *b = (struct RSAKey *) bv; Bignum am, bm; int alen, blen; @@ -314,18 +1111,24 @@ int cmpkeys(void *av, void *bv) { /* * Compare by length of moduli. */ - alen = ssh1_bignum_bitcount(am); - blen = ssh1_bignum_bitcount(bm); - if (alen > blen) return +1; else if (alen < blen) return -1; + alen = bignum_bitcount(am); + blen = bignum_bitcount(bm); + if (alen > blen) + return +1; + else if (alen < blen) + return -1; /* * Now compare by moduli themselves. */ - alen = (alen + 7) / 8; /* byte count */ + alen = (alen + 7) / 8; /* byte count */ while (alen-- > 0) { - int abyte, bbyte; - abyte = bignum_byte(am, alen); - bbyte = bignum_byte(bm, alen); - if (abyte > bbyte) return +1; else if (abyte < bbyte) return -1; + int abyte, bbyte; + abyte = bignum_byte(am, alen); + bbyte = bignum_byte(bm, alen); + if (abyte > bbyte) + return +1; + else if (abyte < bbyte) + return -1; } /* * Give up. @@ -333,278 +1136,890 @@ int cmpkeys(void *av, void *bv) { return 0; } -static void error(char *s) { - MessageBox(hwnd, s, APPNAME, MB_OK | MB_ICONERROR); +/* + * Key comparison function for the 2-3-4 tree of SSH2 keys. + */ +static int cmpkeys_ssh2(void *av, void *bv) +{ + struct ssh2_userkey *a = (struct ssh2_userkey *) av; + struct ssh2_userkey *b = (struct ssh2_userkey *) bv; + int i; + int alen, blen; + unsigned char *ablob, *bblob; + int c; + + /* + * Compare purely by public blob. + */ + ablob = a->alg->public_blob(a->data, &alen); + bblob = b->alg->public_blob(b->data, &blen); + + c = 0; + for (i = 0; i < alen && i < blen; i++) { + if (ablob[i] < bblob[i]) { + c = -1; + break; + } else if (ablob[i] > bblob[i]) { + c = +1; + break; + } + } + if (c == 0 && i < alen) + c = +1; /* a is longer */ + if (c == 0 && i < blen) + c = -1; /* a is longer */ + + sfree(ablob); + sfree(bblob); + + return c; } /* - * Dialog-box function for the key list box. + * Key comparison function for looking up a blob in the 2-3-4 tree + * of SSH2 keys. */ -static int CALLBACK KeyListProc(HWND hwnd, UINT msg, - WPARAM wParam, LPARAM lParam) { - enum234 e; - struct RSAKey *key; +static int cmpkeys_ssh2_asymm(void *av, void *bv) +{ + struct blob *a = (struct blob *) av; + struct ssh2_userkey *b = (struct ssh2_userkey *) bv; + int i; + int alen, blen; + unsigned char *ablob, *bblob; + int c; + + /* + * Compare purely by public blob. + */ + ablob = a->blob; + alen = a->len; + bblob = b->alg->public_blob(b->data, &blen); + + c = 0; + for (i = 0; i < alen && i < blen; i++) { + if (ablob[i] < bblob[i]) { + c = -1; + break; + } else if (ablob[i] > bblob[i]) { + c = +1; + break; + } + } + if (c == 0 && i < alen) + c = +1; /* a is longer */ + if (c == 0 && i < blen) + c = -1; /* a is longer */ + + sfree(bblob); + + return c; +} + +/* + * Prompt for a key file to add, and add it. + */ +static void prompt_add_keyfile(void) +{ OPENFILENAME of; char filename[FILENAME_MAX]; + char *filelist = snewn(8192, char); + char *filewalker; + int n, dirlen; + + memset(&of, 0, sizeof(of)); +#ifdef OPENFILENAME_SIZE_VERSION_400 + of.lStructSize = OPENFILENAME_SIZE_VERSION_400; +#else + of.lStructSize = sizeof(of); +#endif + of.hwndOwner = main_hwnd; + of.lpstrFilter = "PuTTY Private Key Files (*.ppk)\0*.ppk\0" + "All Files (*.*)\0*\0\0\0"; + of.lpstrCustomFilter = NULL; + of.nFilterIndex = 1; + of.lpstrFile = filelist; + *filelist = '\0'; + of.nMaxFile = FILENAME_MAX; + of.lpstrFileTitle = NULL; + of.lpstrInitialDir = NULL; + of.lpstrTitle = "Select Private Key File"; + of.Flags = OFN_ALLOWMULTISELECT | OFN_EXPLORER; + if (GetOpenFileName(&of)) { + if(strlen(filelist) > of.nFileOffset) + /* Only one filename returned? */ + add_keyfile(filename_from_str(filelist)); + else { + /* we are returned a bunch of strings, end to + * end. first string is the directory, the + * rest the filenames. terminated with an + * empty string. + */ + filewalker = filelist; + dirlen = strlen(filewalker); + if(dirlen > FILENAME_MAX - 8) return; + memcpy(filename, filewalker, dirlen); + + filewalker += dirlen + 1; + filename[dirlen++] = '\\'; + + /* then go over names one by one */ + for(;;) { + n = strlen(filewalker) + 1; + /* end of the list */ + if(n == 1) + break; + /* too big, shouldn't happen */ + if(n + dirlen > FILENAME_MAX) + break; + + memcpy(filename + dirlen, filewalker, n); + filewalker += n; + + add_keyfile(filename_from_str(filename)); + } + } + + keylist_update(); + forget_passphrases(); + } + sfree(filelist); +} + +/* + * Dialog-box function for the key list box. + */ +static int CALLBACK KeyListProc(HWND hwnd, UINT msg, + WPARAM wParam, LPARAM lParam) +{ + struct RSAKey *rkey; + struct ssh2_userkey *skey; switch (msg) { case WM_INITDIALOG: - for (key = first234(rsakeys, &e); key; key = next234(&e)) { - SendDlgItemMessage (hwnd, 100, LB_ADDSTRING, - 0, (LPARAM) key->comment); + /* + * Centre the window. + */ + { /* centre the window */ + RECT rs, rd; + HWND hw; + + hw = GetDesktopWindow(); + if (GetWindowRect(hw, &rs) && GetWindowRect(hwnd, &rd)) + MoveWindow(hwnd, + (rs.right + rs.left + rd.left - rd.right) / 2, + (rs.bottom + rs.top + rd.top - rd.bottom) / 2, + rd.right - rd.left, rd.bottom - rd.top, TRUE); + } + + if (help_path) + SetWindowLong(hwnd, GWL_EXSTYLE, + GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_CONTEXTHELP); + else { + HWND item = GetDlgItem(hwnd, 103); /* the Help button */ + if (item) + DestroyWindow(item); } - return 0; + requested_help = FALSE; + + keylist = hwnd; + { + static int tabs[] = { 35, 60, 210 }; + SendDlgItemMessage(hwnd, 100, LB_SETTABSTOPS, + sizeof(tabs) / sizeof(*tabs), + (LPARAM) tabs); + } + keylist_update(); + return 0; case WM_COMMAND: switch (LOWORD(wParam)) { case IDOK: case IDCANCEL: - keylist = NULL; - DestroyWindow(hwnd); - return 0; - case 101: /* add key */ + keylist = NULL; + DestroyWindow(hwnd); + return 0; + case 101: /* add key */ if (HIWORD(wParam) == BN_CLICKED || HIWORD(wParam) == BN_DOUBLECLICKED) { - memset(&of, 0, sizeof(of)); -#ifdef OPENFILENAME_SIZE_VERSION_400 - of.lStructSize = OPENFILENAME_SIZE_VERSION_400; -#else - of.lStructSize = sizeof(of); -#endif - of.hwndOwner = hwnd; - of.lpstrFilter = "All Files\0*\0\0\0"; - of.lpstrCustomFilter = NULL; - of.nFilterIndex = 1; - of.lpstrFile = filename; *filename = '\0'; - of.nMaxFile = sizeof(filename); - of.lpstrFileTitle = NULL; - of.lpstrInitialDir = NULL; - of.lpstrTitle = "Select Public Key File"; - of.Flags = 0; - if (GetOpenFileName(&of)) { - add_keyfile(filename); - } - SendDlgItemMessage(hwnd, 100, LB_RESETCONTENT, 0, 0); - for (key = first234(rsakeys, &e); key; key = next234(&e)) { - SendDlgItemMessage (hwnd, 100, LB_ADDSTRING, - 0, (LPARAM) key->comment); - } - SendDlgItemMessage (hwnd, 100, LB_SETCURSEL, (WPARAM) -1, 0); - } - return 0; - case 102: /* remove key */ + if (passphrase_box) { + MessageBeep(MB_ICONERROR); + SetForegroundWindow(passphrase_box); + break; + } + prompt_add_keyfile(); + } + return 0; + case 102: /* remove key */ if (HIWORD(wParam) == BN_CLICKED || HIWORD(wParam) == BN_DOUBLECLICKED) { - int n = SendDlgItemMessage (hwnd, 100, LB_GETCURSEL, 0, 0); - if (n == LB_ERR || n == 0) { + int i; + int rCount, sCount; + int *selectedArray; + + /* our counter within the array of selected items */ + int itemNum; + + /* get the number of items selected in the list */ + int numSelected = + SendDlgItemMessage(hwnd, 100, LB_GETSELCOUNT, 0, 0); + + /* none selected? that was silly */ + if (numSelected == 0) { MessageBeep(0); break; } - for (key = first234(rsakeys, &e); key; key = next234(&e)) - if (n-- == 0) - break; - del234(rsakeys, key); - freersakey(key); free(key); - SendDlgItemMessage(hwnd, 100, LB_RESETCONTENT, 0, 0); - for (key = first234(rsakeys, &e); key; key = next234(&e)) { - SendDlgItemMessage (hwnd, 100, LB_ADDSTRING, - 0, (LPARAM) key->comment); + + /* get item indices in an array */ + selectedArray = snewn(numSelected, int); + SendDlgItemMessage(hwnd, 100, LB_GETSELITEMS, + numSelected, (WPARAM)selectedArray); + + itemNum = numSelected - 1; + rCount = count234(rsakeys); + sCount = count234(ssh2keys); + + /* go through the non-rsakeys until we've covered them all, + * and/or we're out of selected items to check. note that + * we go *backwards*, to avoid complications from deleting + * things hence altering the offset of subsequent items + */ + for (i = sCount - 1; (itemNum >= 0) && (i >= 0); i--) { + skey = index234(ssh2keys, i); + + if (selectedArray[itemNum] == rCount + i) { + del234(ssh2keys, skey); + skey->alg->freekey(skey->data); + sfree(skey); + itemNum--; + } + } + + /* do the same for the rsa keys */ + for (i = rCount - 1; (itemNum >= 0) && (i >= 0); i--) { + rkey = index234(rsakeys, i); + + if(selectedArray[itemNum] == i) { + del234(rsakeys, rkey); + freersakey(rkey); + sfree(rkey); + itemNum--; + } + } + + sfree(selectedArray); + keylist_update(); + } + return 0; + case 103: /* help */ + if (HIWORD(wParam) == BN_CLICKED || + HIWORD(wParam) == BN_DOUBLECLICKED) { + if (help_path) { + WinHelp(main_hwnd, help_path, HELP_COMMAND, + (DWORD)"JI(`',`pageant.general')"); + requested_help = TRUE; } - SendDlgItemMessage (hwnd, 100, LB_SETCURSEL, (WPARAM) -1, 0); } - return 0; + return 0; } return 0; + case WM_HELP: + if (help_path) { + int id = ((LPHELPINFO)lParam)->iCtrlId; + char *cmd = NULL; + switch (id) { + case 100: cmd = "JI(`',`pageant.keylist')"; break; + case 101: cmd = "JI(`',`pageant.addkey')"; break; + case 102: cmd = "JI(`',`pageant.remkey')"; break; + } + if (cmd) { + WinHelp(main_hwnd, help_path, HELP_COMMAND, (DWORD)cmd); + requested_help = TRUE; + } else { + MessageBeep(0); + } + } + break; case WM_CLOSE: - keylist = NULL; - DestroyWindow(hwnd); + keylist = NULL; + DestroyWindow(hwnd); return 0; } return 0; } -static LRESULT CALLBACK WndProc (HWND hwnd, UINT message, - WPARAM wParam, LPARAM lParam) { +/* Set up a system tray icon */ +static BOOL AddTrayIcon(HWND hwnd) +{ + BOOL res; + NOTIFYICONDATA tnid; + HICON hicon; + +#ifdef NIM_SETVERSION + tnid.uVersion = 0; + res = Shell_NotifyIcon(NIM_SETVERSION, &tnid); +#endif + + tnid.cbSize = sizeof(NOTIFYICONDATA); + tnid.hWnd = hwnd; + tnid.uID = 1; /* unique within this systray use */ + tnid.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP; + tnid.uCallbackMessage = WM_SYSTRAY; + tnid.hIcon = hicon = LoadIcon(instance, MAKEINTRESOURCE(201)); + strcpy(tnid.szTip, "Pageant (PuTTY authentication agent)"); + + res = Shell_NotifyIcon(NIM_ADD, &tnid); + + if (hicon) DestroyIcon(hicon); + + return res; +} + +/* Update the saved-sessions menu. */ +static void update_sessions(void) +{ + int num_entries; + HKEY hkey; + TCHAR buf[MAX_PATH + 1]; + MENUITEMINFO mii; + + int index_key, index_menu; + + if (!putty_path) + return; + + if(ERROR_SUCCESS != RegOpenKey(HKEY_CURRENT_USER, PUTTY_REGKEY, &hkey)) + return; + + for(num_entries = GetMenuItemCount(session_menu); + num_entries > initial_menuitems_count; + num_entries--) + RemoveMenu(session_menu, 0, MF_BYPOSITION); + + index_key = 0; + index_menu = 0; + + while(ERROR_SUCCESS == RegEnumKey(hkey, index_key, buf, MAX_PATH)) { + TCHAR session_name[MAX_PATH + 1]; + unmungestr(buf, session_name, MAX_PATH); + if(strcmp(buf, PUTTY_DEFAULT) != 0) { + memset(&mii, 0, sizeof(mii)); + mii.cbSize = sizeof(mii); + mii.fMask = MIIM_TYPE | MIIM_STATE | MIIM_ID; + mii.fType = MFT_STRING; + mii.fState = MFS_ENABLED; + mii.wID = (index_menu * 16) + IDM_SESSIONS_BASE; + mii.dwTypeData = session_name; + InsertMenuItem(session_menu, index_menu, TRUE, &mii); + index_menu++; + } + index_key++; + } + + RegCloseKey(hkey); + + if(index_menu == 0) { + mii.cbSize = sizeof(mii); + mii.fMask = MIIM_TYPE | MIIM_STATE; + mii.fType = MFT_STRING; + mii.fState = MFS_GRAYED; + mii.dwTypeData = _T("(No sessions)"); + InsertMenuItem(session_menu, index_menu, TRUE, &mii); + } +} + +static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, + WPARAM wParam, LPARAM lParam) +{ int ret; static int menuinprogress; + static UINT msgTaskbarCreated = 0; switch (message) { - case WM_SYSTRAY: - if (lParam == WM_RBUTTONUP) { - POINT cursorpos; - GetCursorPos(&cursorpos); - PostMessage(hwnd, WM_SYSTRAY2, cursorpos.x, cursorpos.y); - } + case WM_CREATE: + msgTaskbarCreated = RegisterWindowMessage(_T("TaskbarCreated")); break; - case WM_SYSTRAY2: - if (!menuinprogress) { - menuinprogress = 1; - SetForegroundWindow(hwnd); - ret = TrackPopupMenu(systray_menu, - TPM_RIGHTALIGN | TPM_BOTTOMALIGN | - TPM_RIGHTBUTTON, - wParam, lParam, 0, hwnd, NULL); - menuinprogress = 0; + default: + if (message==msgTaskbarCreated) { + /* + * Explorer has been restarted, so the tray icon will + * have been lost. + */ + AddTrayIcon(hwnd); } break; + + case WM_SYSTRAY: + if (lParam == WM_RBUTTONUP) { + POINT cursorpos; + GetCursorPos(&cursorpos); + PostMessage(hwnd, WM_SYSTRAY2, cursorpos.x, cursorpos.y); + } else if (lParam == WM_LBUTTONDBLCLK) { + /* Equivalent to IDM_VIEWKEYS. */ + PostMessage(hwnd, WM_COMMAND, IDM_VIEWKEYS, 0); + } + break; + case WM_SYSTRAY2: + if (!menuinprogress) { + menuinprogress = 1; + update_sessions(); + SetForegroundWindow(hwnd); + ret = TrackPopupMenu(systray_menu, + TPM_RIGHTALIGN | TPM_BOTTOMALIGN | + TPM_RIGHTBUTTON, + wParam, lParam, 0, hwnd, NULL); + menuinprogress = 0; + } + break; case WM_COMMAND: case WM_SYSCOMMAND: switch (wParam & ~0xF) { /* low 4 bits reserved to Windows */ - case IDM_CLOSE: - SendMessage(hwnd, WM_CLOSE, 0, 0); - break; - case IDM_VIEWKEYS: - if (!keylist) { - keylist = CreateDialog (instance, MAKEINTRESOURCE(211), - NULL, KeyListProc); - ShowWindow (keylist, SW_SHOWNORMAL); + case IDM_PUTTY: + if((int)ShellExecute(hwnd, NULL, putty_path, _T(""), _T(""), + SW_SHOW) <= 32) { + MessageBox(NULL, "Unable to execute PuTTY!", + "Error", MB_OK | MB_ICONERROR); + } + break; + case IDM_CLOSE: + if (passphrase_box) + SendMessage(passphrase_box, WM_CLOSE, 0, 0); + SendMessage(hwnd, WM_CLOSE, 0, 0); + break; + case IDM_VIEWKEYS: + if (!keylist) { + keylist = CreateDialog(instance, MAKEINTRESOURCE(211), + NULL, KeyListProc); + ShowWindow(keylist, SW_SHOWNORMAL); + } + /* + * Sometimes the window comes up minimised / hidden for + * no obvious reason. Prevent this. This also brings it + * to the front if it's already present (the user + * selected View Keys because they wanted to _see_ the + * thing). + */ + SetForegroundWindow(keylist); + SetWindowPos(keylist, HWND_TOP, 0, 0, 0, 0, + SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW); + break; + case IDM_ADDKEY: + if (passphrase_box) { + MessageBeep(MB_ICONERROR); + SetForegroundWindow(passphrase_box); + break; + } + prompt_add_keyfile(); + break; + case IDM_ABOUT: + if (!aboutbox) { + aboutbox = CreateDialog(instance, MAKEINTRESOURCE(213), + NULL, AboutProc); + ShowWindow(aboutbox, SW_SHOWNORMAL); + /* + * Sometimes the window comes up minimised / hidden + * for no obvious reason. Prevent this. + */ + SetForegroundWindow(aboutbox); + SetWindowPos(aboutbox, HWND_TOP, 0, 0, 0, 0, + SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW); + } + break; + case IDM_HELP: + if (help_path) { + WinHelp(main_hwnd, help_path, HELP_COMMAND, + (DWORD)"JI(`',`pageant.general')"); + requested_help = TRUE; } - break; - } - break; + break; + default: + { + if(wParam >= IDM_SESSIONS_BASE && wParam <= IDM_SESSIONS_MAX) { + MENUITEMINFO mii; + TCHAR buf[MAX_PATH + 1]; + TCHAR param[MAX_PATH + 1]; + memset(&mii, 0, sizeof(mii)); + mii.cbSize = sizeof(mii); + mii.fMask = MIIM_TYPE; + mii.cch = MAX_PATH; + mii.dwTypeData = buf; + GetMenuItemInfo(session_menu, wParam, FALSE, &mii); + strcpy(param, "@"); + strcat(param, mii.dwTypeData); + if((int)ShellExecute(hwnd, NULL, putty_path, param, + _T(""), SW_SHOW) <= 32) { + MessageBox(NULL, "Unable to execute PuTTY!", "Error", + MB_OK | MB_ICONERROR); + } + } + } + break; + } + break; case WM_DESTROY: - PostQuitMessage (0); + if (requested_help) { + WinHelp(main_hwnd, help_path, HELP_QUIT, 0); + requested_help = FALSE; + } + PostQuitMessage(0); return 0; case WM_COPYDATA: - { - COPYDATASTRUCT *cds; - void *in, *out, *ret; - int inlen, outlen; - HANDLE filemap; - char mapname[64]; - int id; - - cds = (COPYDATASTRUCT *)lParam; - /* - * FIXME: use dwData somehow. - */ - in = cds->lpData; - inlen = cds->cbData; - answer_msg(in, inlen, &out, &outlen); - if (out) { - id = 0; - do { - sprintf(mapname, "PageantReply%08x", ++id); - filemap = CreateFileMapping(INVALID_HANDLE_VALUE, - NULL, PAGE_READWRITE, - 0, outlen+sizeof(int), - mapname); - } while (filemap == INVALID_HANDLE_VALUE); - ret = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, - outlen+sizeof(int)); - if (ret) { - *((int *)ret) = outlen; - memcpy(((int *)ret)+1, out, outlen); - UnmapViewOfFile(ret); - return id; - } - } else - return 0; /* invalid request */ - } - break; - case WM_CLOSEMEM: - /* - * FIXME! - */ - break; + { + COPYDATASTRUCT *cds; + char *mapname; + void *p; + HANDLE filemap; +#ifndef NO_SECURITY + HANDLE proc; + PSID mapowner, procowner; + PSECURITY_DESCRIPTOR psd1 = NULL, psd2 = NULL; +#endif + int ret = 0; + + cds = (COPYDATASTRUCT *) lParam; + if (cds->dwData != AGENT_COPYDATA_ID) + return 0; /* not our message, mate */ + mapname = (char *) cds->lpData; + if (mapname[cds->cbData - 1] != '\0') + return 0; /* failure to be ASCIZ! */ +#ifdef DEBUG_IPC + debug(("mapname is :%s:\n", mapname)); +#endif + filemap = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, mapname); +#ifdef DEBUG_IPC + debug(("filemap is %p\n", filemap)); +#endif + if (filemap != NULL && filemap != INVALID_HANDLE_VALUE) { +#ifndef NO_SECURITY + int rc; + if (has_security) { + if ((proc = OpenProcess(MAXIMUM_ALLOWED, FALSE, + GetCurrentProcessId())) == + NULL) { +#ifdef DEBUG_IPC + debug(("couldn't get handle for process\n")); +#endif + return 0; + } + if (getsecurityinfo(proc, SE_KERNEL_OBJECT, + OWNER_SECURITY_INFORMATION, + &procowner, NULL, NULL, NULL, + &psd2) != ERROR_SUCCESS) { +#ifdef DEBUG_IPC + debug(("couldn't get owner info for process\n")); +#endif + CloseHandle(proc); + return 0; /* unable to get security info */ + } + CloseHandle(proc); + if ((rc = getsecurityinfo(filemap, SE_KERNEL_OBJECT, + OWNER_SECURITY_INFORMATION, + &mapowner, NULL, NULL, NULL, + &psd1) != ERROR_SUCCESS)) { +#ifdef DEBUG_IPC + debug( + ("couldn't get owner info for filemap: %d\n", + rc)); +#endif + return 0; + } +#ifdef DEBUG_IPC + debug(("got security stuff\n")); +#endif + if (!EqualSid(mapowner, procowner)) + return 0; /* security ID mismatch! */ +#ifdef DEBUG_IPC + debug(("security stuff matched\n")); +#endif + LocalFree(psd1); + LocalFree(psd2); + } else { +#ifdef DEBUG_IPC + debug(("security APIs not present\n")); +#endif + } +#endif + p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0); +#ifdef DEBUG_IPC + debug(("p is %p\n", p)); + { + int i; + for (i = 0; i < 5; i++) + debug( + ("p[%d]=%02x\n", i, + ((unsigned char *) p)[i]));} +#endif + answer_msg(p); + ret = 1; + UnmapViewOfFile(p); + } + CloseHandle(filemap); + return ret; + } } - return DefWindowProc (hwnd, message, wParam, lParam); + return DefWindowProc(hwnd, message, wParam, lParam); +} + +/* + * Fork and Exec the command in cmdline. [DBW] + */ +void spawn_cmd(char *cmdline, char * args, int show) +{ + if (ShellExecute(NULL, _T("open"), cmdline, + args, NULL, show) <= (HINSTANCE) 32) { + char *msg; + msg = dupprintf("Failed to run \"%.100s\", Error: %d", cmdline, + (int)GetLastError()); + MessageBox(NULL, msg, APPNAME, MB_OK | MB_ICONEXCLAMATION); + sfree(msg); + } } -int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) { +void cleanup_exit(int code) { exit(code); } + +int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) +{ WNDCLASS wndclass; - HANDLE mailslot; MSG msg; + OSVERSIONINFO osi; + HMODULE advapi; + char *command = NULL; + int added_keys = 0; + int argc, i; + char **argv, **argstart; - instance = inst; + /* + * Determine whether we're an NT system (should have security + * APIs) or a non-NT system (don't do security). + */ + memset(&osi, 0, sizeof(OSVERSIONINFO)); + osi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); + if (GetVersionEx(&osi) && osi.dwPlatformId == VER_PLATFORM_WIN32_NT) { + has_security = TRUE; + } else + has_security = FALSE; + + if (has_security) { +#ifndef NO_SECURITY + /* + * Attempt to get the security API we need. + */ + advapi = LoadLibrary("ADVAPI32.DLL"); + getsecurityinfo = + (gsi_fn_t) GetProcAddress(advapi, "GetSecurityInfo"); + if (!getsecurityinfo) { + MessageBox(NULL, + "Unable to access security APIs. Pageant will\n" + "not run, in case it causes a security breach.", + "Pageant Fatal Error", MB_ICONERROR | MB_OK); + return 1; + } +#else + MessageBox(NULL, + "This program has been compiled for Win9X and will\n" + "not run on NT, in case it causes a security breach.", + "Pageant Fatal Error", MB_ICONERROR | MB_OK); + return 1; +#endif + } else + advapi = NULL; - if (!prev) { - wndclass.style = 0; - wndclass.lpfnWndProc = WndProc; - wndclass.cbClsExtra = 0; - wndclass.cbWndExtra = 0; - wndclass.hInstance = inst; - wndclass.hIcon = LoadIcon (inst, - MAKEINTRESOURCE(IDI_MAINICON)); - wndclass.hCursor = LoadCursor (NULL, IDC_IBEAM); - wndclass.hbrBackground = GetStockObject (BLACK_BRUSH); - wndclass.lpszMenuName = NULL; - wndclass.lpszClassName = APPNAME; + instance = inst; - RegisterClass (&wndclass); + /* + * See if we can find our Help file. + */ + { + char b[2048], *p, *q, *r; + FILE *fp; + GetModuleFileName(NULL, b, sizeof(b) - 1); + r = b; + p = strrchr(b, '\\'); + if (p && p >= r) r = p+1; + q = strrchr(b, ':'); + if (q && q >= r) r = q+1; + strcpy(r, "putty.hlp"); + if ( (fp = fopen(b, "r")) != NULL) { + help_path = dupstr(b); + fclose(fp); + } else + help_path = NULL; } - hwnd = keylist = NULL; + /* + * Look for the PuTTY binary (we will enable the saved session + * submenu if we find it). + */ + { + char b[2048], *p, *q, *r; + FILE *fp; + GetModuleFileName(NULL, b, sizeof(b) - 1); + r = b; + p = strrchr(b, '\\'); + if (p && p >= r) r = p+1; + q = strrchr(b, ':'); + if (q && q >= r) r = q+1; + strcpy(r, "putty.exe"); + if ( (fp = fopen(b, "r")) != NULL) { + putty_path = dupstr(b); + fclose(fp); + } else + putty_path = NULL; + } - hwnd = CreateWindow (APPNAME, APPNAME, - WS_OVERLAPPEDWINDOW | WS_VSCROLL, - CW_USEDEFAULT, CW_USEDEFAULT, - 100, 100, NULL, NULL, inst, NULL); + /* + * Find out if Pageant is already running. + */ + already_running = FALSE; + if (agent_exists()) + already_running = TRUE; + else { - /* Set up a system tray icon */ - { - BOOL res; - NOTIFYICONDATA tnid; - HICON hicon; + if (!prev) { + wndclass.style = 0; + wndclass.lpfnWndProc = WndProc; + wndclass.cbClsExtra = 0; + wndclass.cbWndExtra = 0; + wndclass.hInstance = inst; + wndclass.hIcon = LoadIcon(inst, MAKEINTRESOURCE(IDI_MAINICON)); + wndclass.hCursor = LoadCursor(NULL, IDC_IBEAM); + wndclass.hbrBackground = GetStockObject(BLACK_BRUSH); + wndclass.lpszMenuName = NULL; + wndclass.lpszClassName = APPNAME; -#ifdef NIM_SETVERSION - tnid.uVersion = 0; - res = Shell_NotifyIcon(NIM_SETVERSION, &tnid); -#endif + RegisterClass(&wndclass); + } - tnid.cbSize = sizeof(NOTIFYICONDATA); - tnid.hWnd = hwnd; - tnid.uID = 1; /* unique within this systray use */ - tnid.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP; - tnid.uCallbackMessage = WM_SYSTRAY; - tnid.hIcon = hicon = LoadIcon (instance, MAKEINTRESOURCE(201)); - strcpy(tnid.szTip, "Pageant (PuTTY authentication agent)"); + main_hwnd = keylist = NULL; - res = Shell_NotifyIcon(NIM_ADD, &tnid); + main_hwnd = CreateWindow(APPNAME, APPNAME, + WS_OVERLAPPEDWINDOW | WS_VSCROLL, + CW_USEDEFAULT, CW_USEDEFAULT, + 100, 100, NULL, NULL, inst, NULL); - if (hicon) - DestroyIcon(hicon); + /* Set up a system tray icon */ + AddTrayIcon(main_hwnd); + /* Accelerators used: nsvkxa */ systray_menu = CreatePopupMenu(); - AppendMenu (systray_menu, MF_ENABLED, IDM_VIEWKEYS, "View Keys"); - AppendMenu (systray_menu, MF_ENABLED, IDM_CLOSE, "Terminate"); + if (putty_path) { + session_menu = CreateMenu(); + AppendMenu(systray_menu, MF_ENABLED, IDM_PUTTY, "&New Session"); + AppendMenu(systray_menu, MF_POPUP | MF_ENABLED, + (UINT) session_menu, "&Saved Sessions"); + AppendMenu(systray_menu, MF_SEPARATOR, 0, 0); + } + AppendMenu(systray_menu, MF_ENABLED, IDM_VIEWKEYS, + "&View Keys"); + AppendMenu(systray_menu, MF_ENABLED, IDM_ADDKEY, "Add &Key"); + AppendMenu(systray_menu, MF_SEPARATOR, 0, 0); + if (help_path) + AppendMenu(systray_menu, MF_ENABLED, IDM_HELP, "&Help"); + AppendMenu(systray_menu, MF_ENABLED, IDM_ABOUT, "&About"); + AppendMenu(systray_menu, MF_SEPARATOR, 0, 0); + AppendMenu(systray_menu, MF_ENABLED, IDM_CLOSE, "E&xit"); + initial_menuitems_count = GetMenuItemCount(session_menu); + + ShowWindow(main_hwnd, SW_HIDE); + + /* + * Initialise storage for RSA keys. + */ + rsakeys = newtree234(cmpkeys_rsa); + ssh2keys = newtree234(cmpkeys_ssh2); + } - ShowWindow (hwnd, SW_HIDE); + /* + * Initialise the random number generator. + */ + random_init(); + + /* + * Initialise storage for short-term passphrase cache. + */ + passphrases = newtree234(NULL); /* - * Create the mailslot. + * Process the command line and add keys as listed on it. */ - { - SECURITY_ATTRIBUTES sa; - sa.nLength = sizeof(sa); - sa.lpSecurityDescriptor = NULL; - sa.bInheritHandle = TRUE; - mailslot = CreateMailslot(MAILSLOTNAME, 0, 0, &sa); + split_into_argv(cmdline, &argc, &argv, &argstart); + for (i = 0; i < argc; i++) { + if (!strcmp(argv[i], "-c")) { + /* + * If we see `-c', then the rest of the + * command line should be treated as a + * command to be spawned. + */ + if (i < argc-1) + command = argstart[i+1]; + else + command = ""; + break; + } else { + add_keyfile(filename_from_str(argv[i])); + added_keys = TRUE; + } } /* - * Initialise storage for RSA keys. + * Forget any passphrase that we retained while going over + * command line keyfiles. */ - rsakeys = newtree234(cmpkeys); + forget_passphrases(); + if (command) { + char *args; + if (command[0] == '"') + args = strchr(++command, '"'); + else + args = strchr(command, ' '); + if (args) { + *args++ = 0; + while(*args && isspace(*args)) args++; + } + spawn_cmd(command, args, show); + } + + /* + * If Pageant was already running, we leave now. If we haven't + * even taken any auxiliary action (spawned a command or added + * keys), complain. + */ + if (already_running) { + if (!command && !added_keys) { + MessageBox(NULL, "Pageant is already running", "Pageant Error", + MB_ICONERROR | MB_OK); + } + if (advapi) + FreeLibrary(advapi); + return 0; + } + + /* + * Main message loop. + */ while (GetMessage(&msg, NULL, 0, 0) == 1) { - TranslateMessage(&msg); - DispatchMessage(&msg); + if (!(IsWindow(keylist) && IsDialogMessage(keylist, &msg)) && + !(IsWindow(aboutbox) && IsDialogMessage(aboutbox, &msg))) { + TranslateMessage(&msg); + DispatchMessage(&msg); + } } /* Clean up the system tray icon */ { - NOTIFYICONDATA tnid; + NOTIFYICONDATA tnid; - tnid.cbSize = sizeof(NOTIFYICONDATA); - tnid.hWnd = hwnd; - tnid.uID = 1; + tnid.cbSize = sizeof(NOTIFYICONDATA); + tnid.hWnd = main_hwnd; + tnid.uID = 1; - Shell_NotifyIcon(NIM_DELETE, &tnid); + Shell_NotifyIcon(NIM_DELETE, &tnid); - DestroyMenu(systray_menu); + DestroyMenu(systray_menu); } - exit(msg.wParam); + if (advapi) + FreeLibrary(advapi); + return msg.wParam; }