diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/srclib/apr/misc/unix/rand.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/srclib/apr/misc/unix/rand.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/srclib/apr/misc/unix/rand.c b/rubbos/app/httpd-2.0.64/srclib/apr/misc/unix/rand.c new file mode 100644 index 00000000..843c13fc --- /dev/null +++ b/rubbos/app/httpd-2.0.64/srclib/apr/misc/unix/rand.c @@ -0,0 +1,209 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define APR_WANT_MEMFUNC +#include "apr_want.h" +#include "apr_general.h" + +#include "apr_arch_misc.h" +#include <sys/stat.h> +#if APR_HAVE_SYS_TYPES_H +#include <sys/types.h> +#endif +#if APR_HAVE_SYS_SOCKET_H +#include <sys/socket.h> +#endif +#if APR_HAVE_FCNTL_H +#include <fcntl.h> +#endif +#if APR_HAVE_UNISTD_H +#include <unistd.h> +#endif +#if APR_HAVE_SYS_UN_H +#include <sys/un.h> +#endif + +#ifndef SHUT_RDWR +#define SHUT_RDWR 2 +#endif + +#if APR_HAS_RANDOM + +APR_DECLARE(apr_status_t) apr_generate_random_bytes(unsigned char *buf, +#ifdef APR_ENABLE_FOR_1_0 + apr_size_t length) +#else + int length) +#endif +{ +#ifdef DEV_RANDOM + + int fd = -1; + + /* On BSD/OS 4.1, /dev/random gives out 8 bytes at a time, then + * gives EOF, so reading 'length' bytes may require opening the + * device several times. */ + do { + apr_ssize_t rc; + + if (fd == -1) + if ((fd = open(DEV_RANDOM, O_RDONLY)) == -1) + return errno; + + rc = read(fd, buf, length); + if (rc < 0) { + int errnum = errno; + close(fd); + return errnum; + } + else if (rc == 0) { + close(fd); + fd = -1; /* force open() again */ + } + else { + buf += rc; + length -= rc; + } + } while (length > 0); + + close(fd); +#elif defined(OS2) + static UCHAR randbyte(); + unsigned int idx; + + for (idx=0; idx<length; idx++) + buf[idx] = randbyte(); + +#elif defined(HAVE_EGD) + /* use EGD-compatible socket daemon (such as EGD or PRNGd). + * message format: + * 0x00 (get entropy level) + * 0xMM (msb) 0xmm 0xll 0xLL (lsb) + * 0x01 (read entropy nonblocking) 0xNN (bytes requested) + * 0xMM (bytes granted) MM bytes + * 0x02 (read entropy blocking) 0xNN (bytes desired) + * [block] NN bytes + * 0x03 (write entropy) 0xMM 0xLL (bits of entropy) 0xNN (bytes of data) + * NN bytes + * (no response - write only) + * 0x04 (report PID) + * 0xMM (length of PID string, not null-terminated) MM chars + */ + static const char *egd_sockets[] = { EGD_DEFAULT_SOCKET, NULL }; + const char **egdsockname = NULL; + + int egd_socket, egd_path_len, rv, bad_errno; + struct sockaddr_un addr; + apr_socklen_t egd_addr_len; + apr_size_t resp_expected; + unsigned char req[2], resp[255]; + unsigned char *curbuf = buf; + + for (egdsockname = egd_sockets; *egdsockname && length > 0; egdsockname++) { + egd_path_len = strlen(*egdsockname); + + if (egd_path_len > sizeof(addr.sun_path)) { + return APR_EINVAL; + } + + memset(&addr, 0, sizeof(struct sockaddr_un)); + addr.sun_family = AF_UNIX; + memcpy(addr.sun_path, *egdsockname, egd_path_len); + egd_addr_len = APR_OFFSETOF(struct sockaddr_un, sun_path) + + egd_path_len; + + egd_socket = socket(PF_UNIX, SOCK_STREAM, 0); + + if (egd_socket == -1) { + return errno; + } + + rv = connect(egd_socket, (struct sockaddr*)&addr, egd_addr_len); + + if (rv == -1) { + bad_errno = errno; + continue; + } + + /* EGD can only return 255 bytes of data at a time. Silly. */ + while (length > 0) { + apr_ssize_t srv; + req[0] = 2; /* We'll block for now. */ + req[1] = length > 255 ? 255: length; + + srv = write(egd_socket, req, 2); + if (srv == -1) { + bad_errno = errno; + shutdown(egd_socket, SHUT_RDWR); + close(egd_socket); + break; + } + + if (srv != 2) { + shutdown(egd_socket, SHUT_RDWR); + close(egd_socket); + return APR_EGENERAL; + } + + resp_expected = req[1]; + srv = read(egd_socket, resp, resp_expected); + if (srv == -1) { + bad_errno = errno; + shutdown(egd_socket, SHUT_RDWR); + close(egd_socket); + return bad_errno; + } + + memcpy(curbuf, resp, srv); + curbuf += srv; + length -= srv; + } + + shutdown(egd_socket, SHUT_RDWR); + close(egd_socket); + } + + if (length > 0) { + /* We must have iterated through the list of sockets, + * and no go. Return the errno. + */ + return bad_errno; + } + +#elif defined(HAVE_TRUERAND) /* use truerand */ + + extern int randbyte(void); /* from the truerand library */ + unsigned int idx; + + /* this will increase the startup time of the server, unfortunately... + * (generating 20 bytes takes about 8 seconds) + */ + for (idx=0; idx<length; idx++) + buf[idx] = (unsigned char) randbyte(); + +#endif /* DEV_RANDOM */ + + return APR_SUCCESS; +} + +#undef STR +#undef XSTR + +#ifdef OS2 +#include "../os2/randbyte.c" +#endif + +#endif /* APR_HAS_RANDOM */ |