diff options
Diffstat (limited to 'crypto/openssh/entropy.c')
| -rw-r--r-- | crypto/openssh/entropy.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/crypto/openssh/entropy.c b/crypto/openssh/entropy.c deleted file mode 100644 index dcc8689c929f..000000000000 --- a/crypto/openssh/entropy.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * Copyright (c) 2001 Damien Miller. 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. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "includes.h" - -#include <openssl/rand.h> -#include <openssl/crypto.h> - -#include "ssh.h" -#include "misc.h" -#include "xmalloc.h" -#include "atomicio.h" -#include "pathnames.h" -#include "log.h" - -/* - * Portable OpenSSH PRNG seeding: - * If OpenSSL has not "internally seeded" itself (e.g. pulled data from - * /dev/random), then we execute a "ssh-rand-helper" program which - * collects entropy and writes it to stdout. The child program must - * write at least RANDOM_SEED_SIZE bytes. The child is run with stderr - * attached, so error/debugging output should be visible. - * - * XXX: we should tell the child how many bytes we need. - */ - -RCSID("$Id: entropy.c,v 1.44 2002/06/09 19:41:48 mouring Exp $"); - -#ifndef OPENSSL_PRNG_ONLY -#define RANDOM_SEED_SIZE 48 -static uid_t original_uid, original_euid; -#endif - -void -seed_rng(void) -{ -#ifndef OPENSSL_PRNG_ONLY - int devnull; - int p[2]; - pid_t pid; - int ret; - unsigned char buf[RANDOM_SEED_SIZE]; - mysig_t old_sigchld; - - if (RAND_status() == 1) { - debug3("RNG is ready, skipping seeding"); - return; - } - - debug3("Seeding PRNG from %s", SSH_RAND_HELPER); - - if ((devnull = open("/dev/null", O_RDWR)) == -1) - fatal("Couldn't open /dev/null: %s", strerror(errno)); - if (pipe(p) == -1) - fatal("pipe: %s", strerror(errno)); - - old_sigchld = mysignal(SIGCHLD, SIG_DFL); - if ((pid = fork()) == -1) - fatal("Couldn't fork: %s", strerror(errno)); - if (pid == 0) { - dup2(devnull, STDIN_FILENO); - dup2(p[1], STDOUT_FILENO); - /* Keep stderr open for errors */ - close(p[0]); - close(p[1]); - close(devnull); - - if (original_uid != original_euid && - ( seteuid(getuid()) == -1 || - setuid(original_uid) == -1) ) { - fprintf(stderr, "(rand child) setuid(%d): %s\n", - original_uid, strerror(errno)); - _exit(1); - } - - execl(SSH_RAND_HELPER, "ssh-rand-helper", NULL); - fprintf(stderr, "(rand child) Couldn't exec '%s': %s\n", - SSH_RAND_HELPER, strerror(errno)); - _exit(1); - } - - close(devnull); - close(p[1]); - - memset(buf, '\0', sizeof(buf)); - ret = atomicio(read, p[0], buf, sizeof(buf)); - if (ret == -1) - fatal("Couldn't read from ssh-rand-helper: %s", - strerror(errno)); - if (ret != sizeof(buf)) - fatal("ssh-rand-helper child produced insufficient data"); - - close(p[0]); - - if (waitpid(pid, &ret, 0) == -1) - fatal("Couldn't wait for ssh-rand-helper completion: %s", - strerror(errno)); - mysignal(SIGCHLD, old_sigchld); - - /* We don't mind if the child exits upon a SIGPIPE */ - if (!WIFEXITED(ret) && - (!WIFSIGNALED(ret) || WTERMSIG(ret) != SIGPIPE)) - fatal("ssh-rand-helper terminated abnormally"); - if (WEXITSTATUS(ret) != 0) - fatal("ssh-rand-helper exit with exit status %d", ret); - - RAND_add(buf, sizeof(buf), sizeof(buf)); - memset(buf, '\0', sizeof(buf)); - -#endif /* OPENSSL_PRNG_ONLY */ - if (RAND_status() != 1) - fatal("PRNG is not seeded"); -} - -void -init_rng(void) -{ - /* - * OpenSSL version numbers: MNNFFPPS: major minor fix patch status - * We match major, minor, fix and status (not patch) - */ - if ((SSLeay() ^ OPENSSL_VERSION_NUMBER) & ~0xff0L) - fatal("OpenSSL version mismatch. Built against %lx, you " - "have %lx", OPENSSL_VERSION_NUMBER, SSLeay()); - -#ifndef OPENSSL_PRNG_ONLY - if ((original_uid = getuid()) == -1) - fatal("getuid: %s", strerror(errno)); - if ((original_euid = geteuid()) == -1) - fatal("geteuid: %s", strerror(errno)); -#endif -} - |