/*% * Write a key file to 'keyfile'. If 'user' is non-NULL, * make that user the owner of the file. The key will have * the name 'keyname' and the secret in the buffer 'secret'. */ void write_key_file(const char *keyfile, const char *user, const char *keyname, isc_buffer_t *secret, dns_secalg_t alg) { isc_result_t result; const char *algname = alg_totext(alg); FILE *fd = NULL; DO("create keyfile", isc_file_safecreate(keyfile, &fd)); if (user != NULL) { if (set_user(fd, user) == -1) fatal("unable to set file owner\n"); } fprintf(fd, "key \"%s\" {\n\talgorithm %s;\n" "\tsecret \"%.*s\";\n};\n", keyname, algname, (int)isc_buffer_usedlength(secret), (char *)isc_buffer_base(secret)); fflush(fd); if (ferror(fd)) fatal("write to %s failed\n", keyfile); if (fclose(fd)) fatal("fclose(%s) failed\n", keyfile); fprintf(stderr, "wrote key file \"%s\"\n", keyfile); }
int main(int argc, char **argv) { isc_boolean_t show_final_mem = ISC_FALSE; isc_buffer_t key_txtbuffer; char key_txtsecret[256]; isc_mem_t *mctx = NULL; isc_result_t result = ISC_R_SUCCESS; const char *keyname = NULL; const char *randomfile = NULL; const char *serveraddr = NULL; dns_secalg_t alg = DST_ALG_HMACMD5; const char *algname = alg_totext(alg); char *p; int ch; int port; int keysize; struct in_addr addr4_dummy; struct in6_addr addr6_dummy; char *chrootdir = NULL; char *user = NULL; isc_boolean_t keyonly = ISC_FALSE; int len; keydef = keyfile = RNDC_KEYFILE; result = isc_file_progname(*argv, program, sizeof(program)); if (result != ISC_R_SUCCESS) memmove(program, "rndc-confgen", 13); progname = program; keyname = DEFAULT_KEYNAME; keysize = DEFAULT_KEYLENGTH; serveraddr = DEFAULT_SERVER; port = DEFAULT_PORT; isc_commandline_errprint = ISC_FALSE; while ((ch = isc_commandline_parse(argc, argv, "ab:c:hk:Mmp:r:s:t:u:Vy")) != -1) { switch (ch) { case 'a': keyonly = ISC_TRUE; break; case 'b': keysize = strtol(isc_commandline_argument, &p, 10); if (*p != '\0' || keysize < 0) fatal("-b requires a non-negative number"); break; case 'c': keyfile = isc_commandline_argument; break; case 'h': usage(0); case 'k': case 'y': /* Compatible with rndc -y. */ keyname = isc_commandline_argument; break; case 'M': isc_mem_debugging = ISC_MEM_DEBUGTRACE; break; case 'm': show_final_mem = ISC_TRUE; break; case 'p': port = strtol(isc_commandline_argument, &p, 10); if (*p != '\0' || port < 0 || port > 65535) fatal("port '%s' out of range", isc_commandline_argument); break; case 'r': randomfile = isc_commandline_argument; break; case 's': serveraddr = isc_commandline_argument; if (inet_pton(AF_INET, serveraddr, &addr4_dummy) != 1 && inet_pton(AF_INET6, serveraddr, &addr6_dummy) != 1) fatal("-s should be an IPv4 or IPv6 address"); break; case 't': chrootdir = isc_commandline_argument; break; case 'u': user = isc_commandline_argument; break; case 'V': verbose = ISC_TRUE; break; case '?': if (isc_commandline_option != '?') { fprintf(stderr, "%s: invalid argument -%c\n", program, isc_commandline_option); usage(1); } else usage(0); break; default: fprintf(stderr, "%s: unhandled option -%c\n", program, isc_commandline_option); exit(1); } } argc -= isc_commandline_index; argv += isc_commandline_index; POST(argv); if (argc > 0) usage(1); DO("create memory context", isc_mem_create(0, 0, &mctx)); isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret)); generate_key(mctx, randomfile, alg, keysize, &key_txtbuffer); if (keyonly) { write_key_file(keyfile, chrootdir == NULL ? user : NULL, keyname, &key_txtbuffer, alg); if (chrootdir != NULL) { char *buf; len = strlen(chrootdir) + strlen(keyfile) + 2; buf = isc_mem_get(mctx, len); if (buf == NULL) fatal("isc_mem_get(%d) failed\n", len); snprintf(buf, len, "%s%s%s", chrootdir, (*keyfile != '/') ? "/" : "", keyfile); write_key_file(buf, user, keyname, &key_txtbuffer, alg); isc_mem_put(mctx, buf, len); } } else { printf("\ # Start of rndc.conf\n\ key \"%s\" {\n\ algorithm %s;\n\ secret \"%.*s\";\n\ };\n\ \n\ options {\n\ default-key \"%s\";\n\ default-server %s;\n\ default-port %d;\n\ };\n\ # End of rndc.conf\n\ \n\ # Use with the following in named.conf, adjusting the allow list as needed:\n\ # key \"%s\" {\n\ # algorithm %s;\n\ # secret \"%.*s\";\n\ # };\n\ # \n\ # controls {\n\ # inet %s port %d\n\ # allow { %s; } keys { \"%s\"; };\n\ # };\n\ # End of named.conf\n", keyname, algname, (int)isc_buffer_usedlength(&key_txtbuffer), (char *)isc_buffer_base(&key_txtbuffer), keyname, serveraddr, port, keyname, algname, (int)isc_buffer_usedlength(&key_txtbuffer), (char *)isc_buffer_base(&key_txtbuffer), serveraddr, port, serveraddr, keyname); } if (show_final_mem) isc_mem_stats(mctx, stderr); isc_mem_destroy(&mctx); return (0); }