跳过导航链接 | |
退出打印视图 | |
![]() |
Oracle Solaris 11 开发者安全性指南 Oracle Solaris 11.1 Information Library (简体中文) |
以下是SASL 示例中所介绍样例服务器的代码列表。
注 - 此示例的源代码也可以通过 Oracle 下载中心获取。请参见 http://www.oracle.com/technetwork/indexes/downloads/sdlc-decommission-333274.html。
#pragma ident "@(#)server.c 1.3 03/04/07 SMI" /* $Id: server.c,v 1.4 2002/10/07 05:04:05 rjs3 Exp $ */ /* * Copyright (c) 2001 Carnegie Mellon University. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The name "Carnegie Mellon University" must not be used to * endorse or promote products derived from this software without * prior written permission. For permission or any other legal * details, please contact * Office of Technology Transfer * Carnegie Mellon University * 5000 Forbes Avenue * Pittsburgh, PA 15213-3890 * (412) 268-4387, fax: (412) 268-7395 * tech-transfer@andrew.cmu.edu * * 4. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by Computing Services * at Carnegie Mellon University (http://www.cmu.edu/computing/)." * * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <config.h> #include <stdio.h> #include <stdlib.h> #include <stdarg.h> #include <ctype.h> #include <errno.h> #include <string.h> #ifdef HAVE_UNISTD_H #include <unistd.h> #endif #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #ifdef _SUN_SDK_ #include <sysexits.h> #endif /* _SUN_SDK_ */ #include <sasl.h> #include "common.h" #if !defined(IPV6_BINDV6ONLY) && defined(IN6P_IPV6_V6ONLY) #define IPV6_BINDV6ONLY IN6P_BINDV6ONLY #endif #if !defined(IPV6_V6ONLY) && defined(IPV6_BINDV6ONLY) #define IPV6_V6ONLY IPV6_BINDV6ONLY #endif #ifndef IPV6_BINDV6ONLY #undef IPV6_V6ONLY #endif static int getpath(void * context __attribute__((unused)), const char **path) { *path = getenv("SASL_PATH"); if (*path == NULL) *path = PLUGINDIR; return SASL_OK; } /* callbacks we support */ static sasl_callback_t callbacks[] = { { SASL_CB_GETPATH, &getpath, NULL }, { SASL_CB_LIST_END, NULL, NULL } }; /* create a socket listening on port 'port' */ /* if af is PF_UNSPEC more than one socket might be returned */ /* the returned list is dynamically allocated, so caller needs to free it */ int *listensock(const char *port, const int af) { struct addrinfo hints, *ai, *r; int err, maxs, *sock, *socks; const int on = 1; memset(&hints, 0, sizeof(hints)); hints.ai_flags = AI_PASSIVE; hints.ai_family = af; hints.ai_socktype = SOCK_STREAM; err = getaddrinfo(NULL, port, &hints, &ai); if (err) { fprintf(stderr, "%s\n", gai_strerror(err)); exit(EX_USAGE); } /* Count max number of sockets we can open */ for (maxs = 0, r = ai; r; r = r->ai_next, maxs++) ; socks = malloc((maxs + 1) * sizeof(int)); if (!socks) { fprintf(stderr, "couldn't allocate memory for sockets\n"); freeaddrinfo(ai); exit(EX_OSERR); } socks[0] = 0; /* num of sockets counter at start of array */ sock = socks + 1; for (r = ai; r; r = r->ai_next) { fprintf(stderr, "trying %d, %d, %d\n",r->ai_family, r->ai_socktype, r->ai_protocol); *sock = socket(r->ai_family, r->ai_socktype, r->ai_protocol); if (*sock < 0) { perror("socket"); continue; } if (setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) < 0) { perror("setsockopt(SO_REUSEADDR)"); close(*sock); continue; } #if defined(IPV6_V6ONLY) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) if (r->ai_family == AF_INET6) { if (setsockopt(*sock, IPPROTO_IPV6, IPV6_BINDV6ONLY, (void *) &on, sizeof(on)) < 0) { perror("setsockopt (IPV6_BINDV6ONLY)"); close(*sock); continue; } } #endif if (bind(*sock, r->ai_addr, r->ai_addrlen) < 0) { perror("bind"); close(*sock); continue; } if (listen(*sock, 5) < 0) { perror("listen"); close(*sock); continue; } socks[0]++; sock++; } freeaddrinfo(ai); if (socks[0] == 0) { fprintf(stderr, "Couldn't bind to any socket\n"); free(socks); exit(EX_OSERR); } return socks; } #ifdef _SUN_SDK_ void usage(const char *s) #else void usage(void) #endif /* _SUN_SDK_ */ { #ifdef _SUN_SDK_ fprintf(stderr, "usage: %s [-p port] [-s service] [-m mech]\n", s); #else fprintf(stderr, "usage: server [-p port] [-s service] [-m mech]\n"); #endif /* _SUN_SDK_ */ exit(EX_USAGE); } /* Globals are used here, but local variables are preferred */ char *mech; /* do the sasl negotiation; return -1 if it fails */ int mysasl_negotiate(FILE *in, FILE *out, sasl_conn_t *conn) { char buf[8192]; char chosenmech[128]; const char *data; #ifdef _SUN_SDK_ unsigned len; #else int len; #endif /* _SUN_SDK_ */ int r = SASL_FAIL; const char *userid; /* generate the capability list */ if (mech) { dprintf(2, "forcing use of mechanism %s\n", mech); data = strdup(mech); } else { int count; dprintf(1, "generating client mechanism list... "); r = sasl_listmech(conn, NULL, NULL, " ", NULL, &data, &len, &count); if (r != SASL_OK) saslfail(r, "generating mechanism list"); dprintf(1, "%d mechanisms\n", count); } /* send capability list to client */ send_string(out, data, len); dprintf(1, "waiting for client mechanism...\n"); len = recv_string(in, chosenmech, sizeof chosenmech); if (len <= 0) { printf("client didn't choose mechanism\n"); fputc('N', out); /* send NO to client */ fflush(out); return -1; } if (mech && strcasecmp(mech, chosenmech)) { printf("client didn't choose mandatory mechanism\n"); fputc('N', out); /* send NO to client */ fflush(out); return -1; } len = recv_string(in, buf, sizeof(buf)); if(len != 1) { saslerr(r, "didn't receive first-send parameter correctly"); fputc('N', out); fflush(out); return -1; } if(buf[0] == 'Y') { /* receive initial response (if any) */ len = recv_string(in, buf, sizeof(buf)); /* start libsasl negotiation */ r = sasl_server_start(conn, chosenmech, buf, len, &data, &len); } else { r = sasl_server_start(conn, chosenmech, NULL, 0, &data, &len); } if (r != SASL_OK && r != SASL_CONTINUE) { saslerr(r, "starting SASL negotiation"); fputc('N', out); /* send NO to client */ fflush(out); return -1; } while (r == SASL_CONTINUE) { if (data) { dprintf(2, "sending response length %d...\n", len); fputc('C', out); /* send CONTINUE to client */ send_string(out, data, len); } else { dprintf(2, "sending null response...\n"); fputc('C', out); /* send CONTINUE to client */ send_string(out, "", 0); } dprintf(1, "waiting for client reply...\n"); len = recv_string(in, buf, sizeof buf); if (len < 0) { printf("client disconnected\n"); return -1; } r = sasl_server_step(conn, buf, len, &data, &len); if (r != SASL_OK && r != SASL_CONTINUE) { saslerr(r, "performing SASL negotiation"); fputc('N', out); /* send NO to client */ fflush(out); return -1; } } if (r != SASL_OK) { saslerr(r, "incorrect authentication"); fputc('N', out); /* send NO to client */ fflush(out); return -1; } fputc('O', out); /* send OK to client */ fflush(out); dprintf(1, "negotiation complete\n"); r = sasl_getprop(conn, SASL_USERNAME, (const void **) &userid); printf("successful authentication '%s'\n", userid); return 0; } int main(int argc, char *argv[]) { int c; char *port = "12345"; char *service = "rcmd"; int *l, maxfd=0; int r, i; sasl_conn_t *conn; while ((c = getopt(argc, argv, "p:s:m:")) != EOF) { switch(c) { case 'p': port = optarg; break; case 's': service = optarg; break; case 'm': mech = optarg; break; default: #ifdef _SUN_SDK_ usage(argv[0]); #else usage(); #endif /* _SUN_SDK_ */ break; } } /* initialize the sasl library */ r = sasl_server_init(callbacks, "sample"); if (r != SASL_OK) saslfail(r, "initializing libsasl"); /* get a listening socket */ if ((l = listensock(port, PF_UNSPEC)) == NULL) { saslfail(SASL_FAIL, "allocating listensock"); } for (i = 1; i <= l[0]; i++) { if (l[i] > maxfd) maxfd = l[i]; } for (;;) { char localaddr[NI_MAXHOST | NI_MAXSERV], remoteaddr[NI_MAXHOST | NI_MAXSERV]; char myhostname[1024+1]; char hbuf[NI_MAXHOST], pbuf[NI_MAXSERV]; struct sockaddr_storage local_ip, remote_ip; int salen; int nfds, fd = -1; FILE *in, *out; fd_set readfds; FD_ZERO(&readfds); for (i = 1; i <= l[0]; i++) FD_SET(l[i], &readfds); nfds = select(maxfd + 1, &readfds, 0, 0, 0); if (nfds <= 0) { if (nfds < 0 && errno != EINTR) perror("select"); continue; } for (i = 1; i <= l[0]; i++) if (FD_ISSET(l[i], &readfds)) { fd = accept(l[i], NULL, NULL); break; } if (fd < 0) { if (errno != EINTR) perror("accept"); continue; } printf("accepted new connection\n"); /* set ip addresses */ salen = sizeof(local_ip); if (getsockname(fd, (struct sockaddr *)&local_ip, &salen) < 0) { perror("getsockname"); } getnameinfo((struct sockaddr *)&local_ip, salen, hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), #ifdef _SUN_SDK_ /* SOLARIS doesn't support NI_WITHSCOPEID */ NI_NUMERICHOST | NI_NUMERICSERV); #else NI_NUMERICHOST | NI_WITHSCOPEID | NI_NUMERICSERV); #endif snprintf(localaddr, sizeof(localaddr), "%s;%s", hbuf, pbuf); salen = sizeof(remote_ip); if (getpeername(fd, (struct sockaddr *)&remote_ip, &salen) < 0) { perror("getpeername"); } getnameinfo((struct sockaddr *)&remote_ip, salen, hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), #ifdef _SUN_SDK_ /* SOLARIS doesn't support NI_WITHSCOPEID */ NI_NUMERICHOST | NI_NUMERICSERV); #else NI_NUMERICHOST | NI_WITHSCOPEID | NI_NUMERICSERV); #endif snprintf(remoteaddr, sizeof(remoteaddr), "%s;%s", hbuf, pbuf); r = gethostname(myhostname, sizeof(myhostname)-1); if(r == -1) saslfail(r, "getting hostname"); r = sasl_server_new(service, myhostname, NULL, localaddr, remoteaddr, NULL, 0, &conn); if (r != SASL_OK) saslfail(r, "allocating connection state"); /* set external properties here sasl_setprop(conn, SASL_SSF_EXTERNAL, &extprops); */ /* set required security properties here sasl_setprop(conn, SASL_SEC_PROPS, &secprops); */ in = fdopen(fd, "r"); out = fdopen(fd, "w"); r = mysasl_negotiate(in, out, conn); if (r == SASL_OK) { /* send/receive data */ } printf("closing connection\n"); fclose(in); fclose(out); close(fd); sasl_dispose(&conn); } sasl_done(); }