From 6e854a367906a138904a26317b5f44e79e3b0bdb Mon Sep 17 00:00:00 2001 From: Assar Westerlund Date: Mon, 11 Aug 1997 17:12:54 +0000 Subject: [PATCH] Use krb5_change_password git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2915 ec53bebd-3082-4978-b11e-865c3cabbd6b --- kpasswd/kpasswd.c | 355 +++++----------------------------------------- 1 file changed, 37 insertions(+), 318 deletions(-) diff --git a/kpasswd/kpasswd.c b/kpasswd/kpasswd.c index 4368da464..48f9b89db 100644 --- a/kpasswd/kpasswd.c +++ b/kpasswd/kpasswd.c @@ -39,319 +39,6 @@ #include "kpasswd_locl.h" RCSID("$Id$"); -static struct sockaddr_in -get_kdc_address (krb5_context context, - krb5_realm realm) -{ - krb5_error_code ret; - struct sockaddr_in addr; - struct hostent *hostent; - char **hostlist; - char *dot; - - ret = krb5_get_krbhst (context, - &realm, - &hostlist); - if (ret) - errx (1, "krb5_get_krbhst: %s", - krb5_get_err_text(context, ret)); - - dot = strchr (*hostlist, ':'); - if (dot) - *dot = '\0'; - - hostent = gethostbyname (*hostlist); - if (hostent == 0) - errx (1, "gethostbyname '%s' failed: %s", - *hostlist, hstrerror(h_errno)); - - krb5_free_krbhst (context, hostlist); - - memset (&addr, 0, sizeof(addr)); - addr.sin_family = AF_INET; - memcpy (&addr.sin_addr, hostent->h_addr_list[0], sizeof(addr.sin_addr)); - addr.sin_port = krb5_getportbyname ("kpasswd", - "udp", - htons(KPASSWD_PORT)); - - return addr; -} - -static void -send_request (krb5_context context, - krb5_auth_context *auth_context, - krb5_creds *creds, - int sock, - struct sockaddr_in addr, - char *passwd) -{ - krb5_error_code ret; - krb5_data ap_req_data; - krb5_data krb_priv_data; - krb5_data passwd_data; - size_t len; - u_char header[6]; - u_char *p; - struct iovec iov[3]; - struct msghdr msghdr; - - krb5_data_zero (&ap_req_data); - - ret = krb5_mk_req_extended (context, - auth_context, - AP_OPTS_MUTUAL_REQUIRED, - NULL, /* in_data */ - creds, - &ap_req_data); - if (ret) - errx (1, "krb5_mk_req_extended: %s", - krb5_get_err_text(context, ret)); - - passwd_data.data = passwd; - passwd_data.length = strlen(passwd); - - krb5_data_zero (&krb_priv_data); - - ret = krb5_mk_priv (context, - *auth_context, - &passwd_data, - &krb_priv_data, - NULL); - if (ret) - errx (1, "krb5_mk_priv: %s", - krb5_get_err_text(context, ret)); - - len = 6 + ap_req_data.length + krb_priv_data.length; - p = header; - *p++ = (len >> 8) & 0xFF; - *p++ = (len >> 0) & 0xFF; - *p++ = 0; - *p++ = 1; - *p++ = (ap_req_data.length >> 8) & 0xFF; - *p++ = (ap_req_data.length >> 0) & 0xFF; - - memset(&msghdr, 0, sizeof(msghdr)); - msghdr.msg_name = (void *)&addr; - msghdr.msg_namelen = sizeof(addr); - msghdr.msg_iov = iov; - msghdr.msg_iovlen = sizeof(iov)/sizeof(*iov); -#if 0 - msghdr.msg_control = NULL; - msghdr.msg_controllen = 0; -#endif - - iov[0].iov_base = header; - iov[0].iov_len = 6; - iov[1].iov_base = ap_req_data.data; - iov[1].iov_len = ap_req_data.length; - iov[2].iov_base = krb_priv_data.data; - iov[2].iov_len = krb_priv_data.length; - - if (sendmsg (sock, &msghdr, 0) < 0) - err (1, "sendmsg"); - - krb5_data_free (&ap_req_data); - krb5_data_free (&krb_priv_data); -} - -static int -process_reply (krb5_context context, - krb5_auth_context auth_context, - int sock) -{ - krb5_error_code ret; - u_char reply[BUFSIZ]; - size_t len; - u_int16_t pkt_len, pkt_ver; - krb5_data ap_rep_data; - - ret = recvfrom (sock, reply, sizeof(reply), 0, NULL, NULL); - if (ret < 0) { - warn ("recvfrom"); - return 1; - } - len = ret; - pkt_len = (reply[0] << 8) | (reply[1]); - pkt_ver = (reply[2] << 8) | (reply[3]); - - if (pkt_len != len) { - warnx ("wrong len in reply"); - return 1; - } - if (pkt_ver != 0x0001) { - warnx ("wrong version number (%d)", pkt_ver); - return 1; - } - - ap_rep_data.data = reply + 6; - ap_rep_data.length = (reply[4] << 8) | (reply[5]); - - if (ap_rep_data.length) { - u_int16_t result_code; - krb5_ap_rep_enc_part *ap_rep; - krb5_data result_data; - krb5_data priv_data; - u_char *p; - - ret = krb5_rd_rep (context, - auth_context, - &ap_rep_data, - &ap_rep); - if (ret) - errx (1, "krb5_rd_rep: %s", - krb5_get_err_text(context, ret)); - - krb5_free_ap_rep_enc_part (context, ap_rep); - - priv_data.data = (u_char*)ap_rep_data.data + ap_rep_data.length; - priv_data.length = len - ap_rep_data.length - 6; - - krb5_data_zero (&result_data); - - ret = krb5_rd_priv (context, - auth_context, - &priv_data, - &result_data, - NULL); - if (ret) { - warnx ("krb5_rd_priv: %s", - krb5_get_err_text(context, ret)); - krb5_data_free (&result_data); - return 1; - } - - if (result_data.length < 2) { - warnx ("bad length in result"); - krb5_data_free (&result_data); - return 1; - } - p = result_data.data; - - result_code = (p[0] << 8) | p[1]; - if (result_code == 0) { - printf ("succeeded: %.*s\n", - (int)result_data.length - 2, - (char *)result_data.data + 2); - krb5_data_free (&result_data); - return 0; - } else { - printf ("failed(%d): %.*s\n", - result_code, - (int)result_data.length - 2, - (char *)result_data.data + 2); - krb5_data_free (&result_data); - return 1; - } - } else { - KRB_ERROR error; - size_t size; - u_char *p; - u_int16_t result_code; - - ret = decode_KRB_ERROR(reply + 6, len - 6, &error, &size); - if (ret) { - warnx ("even failed to decode the krb_error message"); - return 1; - } - if (error.e_data->length < 2) { - warnx ("too short e_data to print anything usable"); - return 1; - } - - p = error.e_data->data; - result_code = (p[0] << 8) | p[1]; - if (result_code == 0) { - warnx ("result code == 0 in a krb_error. What?"); - } else { - printf ("failed(%d) %.*s\n", - result_code, - (int)error.e_data->length - 2, - p + 2); - } - return 1; - } -} - -static int -change_password (krb5_context context, - krb5_principal principal, - krb5_get_init_creds_opt *opt) -{ - krb5_error_code ret; - krb5_auth_context auth_context = NULL; - krb5_creds cred; - char pwbuf[BUFSIZ]; - int sock; - struct sockaddr_in addr; - int i; - - memset(&cred, 0, sizeof(cred)); - - ret = krb5_get_init_creds_password (context, - &cred, - principal, - NULL, - krb5_prompter_posix, - NULL, - 0, - "kadmin/changepw", - opt); - if (ret) - errx (1, "krb5_get_init_creds: %s", krb5_get_err_text(context, ret)); - - if(des_read_pw_string (pwbuf, sizeof(pwbuf), "New password: ", 1) != 0) - return 1; - - sock = socket (AF_INET, SOCK_DGRAM, 0); - if (sock < 0) - err (1, "socket"); - - addr = get_kdc_address (context, cred.client->realm); - - ret = krb5_auth_con_init (context, &auth_context); - if (ret) - errx (1, "krb5_auth_con_init: %s", - krb5_get_err_text (context, ret)); - - krb5_auth_con_setflags (context, auth_context, - KRB5_AUTH_CONTEXT_DO_SEQUENCE); - - for (i = 0; i < 5; ++i) { - struct fd_set fdset; - struct timeval tv; - - send_request (context, - &auth_context, - &cred, - sock, - addr, - pwbuf); - - FD_ZERO(&fdset); - FD_SET(sock, &fdset); - tv.tv_usec = 0; - tv.tv_sec = 1 << i; - - ret = select (sock + 1, &fdset, NULL, NULL, &tv); - if (ret < 0 && errno != EINTR) - err (1, "select"); - if (ret == 1) - break; - } - if (i == 5) - errx (1, "Did not manage to contact kdc"); - - krb5_free_creds_contents (context, &cred); - - ret = process_reply (context, - auth_context, - sock); - - krb5_auth_con_free (context, auth_context); - - return ret; -} - static int preauth = 1; static int version_flag; static int help_flag; @@ -383,6 +70,10 @@ main (int argc, char **argv) krb5_preauthtype pre_auth_types[] = {KRB5_PADATA_ENC_TIMESTAMP}; int optind = 0; krb5_get_init_creds_opt opt; + krb5_creds cred; + int result_code; + krb5_data result_code_string, result_string; + char pwbuf[BUFSIZ]; set_progname (argv[0]); @@ -420,11 +111,39 @@ main (int argc, char **argv) } else principal = NULL; - ret = change_password (context, - principal, - &opt); + ret = krb5_get_init_creds_password (context, + &cred, + principal, + NULL, + krb5_prompter_posix, + NULL, + 0, + "kadmin/changepw", + &opt); + if (ret) + errx (1, "krb5_get_initial_creds: %s", + krb5_get_err_text(context, ret)); - krb5_free_principal (context, principal); + krb5_data_zero (&result_code_string); + krb5_data_zero (&result_string); + + if(des_read_pw_string (pwbuf, sizeof(pwbuf), "New password: ", 1) != 0) + return 1; + + ret = krb5_change_password (context, &cred, pwbuf, + &result_code, + &result_code_string, + &result_string); + if (ret) + errx (1, "krb5_change_password: %s", + krb5_get_err_text(context, ret)); + + printf ("%.*s\n", result_string.length, result_string.data); + + krb5_data_free (&result_code_string); + krb5_data_free (&result_string); + + krb5_free_creds_contents (context, &cred); krb5_free_context (context); - return ret; + return result_code; }