mirror of
https://github.com/pineappleEA/pineapple-src.git
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226 lines
4.5 KiB
C
Executable File
226 lines
4.5 KiB
C
Executable File
/* $OpenBSD: tls_util.c,v 1.14 2019/04/13 18:47:58 tb Exp $ */
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/*
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* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
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* Copyright (c) 2014 Ted Unangst <tedu@openbsd.org>
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* Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "tls.h"
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#include "tls_internal.h"
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static void *
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memdup(const void *in, size_t len)
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{
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void *out;
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if ((out = malloc(len)) == NULL)
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return NULL;
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memcpy(out, in, len);
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return out;
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}
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int
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tls_set_mem(char **dest, size_t *destlen, const void *src, size_t srclen)
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{
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free(*dest);
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*dest = NULL;
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*destlen = 0;
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if (src != NULL) {
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if ((*dest = memdup(src, srclen)) == NULL)
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return -1;
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*destlen = srclen;
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}
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return 0;
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}
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int
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tls_set_string(const char **dest, const char *src)
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{
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free((char *)*dest);
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*dest = NULL;
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if (src != NULL)
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if ((*dest = strdup(src)) == NULL)
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return -1;
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return 0;
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}
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/*
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* Extract the host and port from a colon separated value. For a literal IPv6
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* address the address must be contained with square braces. If a host and
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* port are successfully extracted, the function will return 0 and the
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* caller is responsible for freeing the host and port. If no port is found
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* then the function will return 1, with both host and port being NULL.
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* On memory allocation failure -1 will be returned.
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*/
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int
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tls_host_port(const char *hostport, char **host, char **port)
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{
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char *h, *p, *s;
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int rv = 1;
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*host = NULL;
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*port = NULL;
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if ((s = strdup(hostport)) == NULL)
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goto err;
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h = p = s;
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/* See if this is an IPv6 literal with square braces. */
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if (p[0] == '[') {
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h++;
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if ((p = strchr(s, ']')) == NULL)
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goto done;
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*p++ = '\0';
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}
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/* Find the port seperator. */
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if ((p = strchr(p, ':')) == NULL)
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goto done;
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/* If there is another separator then we have issues. */
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if (strchr(p + 1, ':') != NULL)
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goto done;
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*p++ = '\0';
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if (asprintf(host, "%s", h) == -1) {
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*host = NULL;
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goto err;
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}
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if (asprintf(port, "%s", p) == -1) {
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*port = NULL;
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goto err;
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}
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rv = 0;
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goto done;
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err:
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free(*host);
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*host = NULL;
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free(*port);
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*port = NULL;
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rv = -1;
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done:
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free(s);
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return (rv);
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}
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int
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tls_password_cb(char *buf, int size, int rwflag, void *u)
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{
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size_t len;
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if (size < 0)
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return (0);
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if (u == NULL) {
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memset(buf, 0, size);
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return (0);
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}
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if ((len = strlcpy(buf, u, size)) >= (size_t)size)
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return (0);
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return (len);
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}
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uint8_t *
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tls_load_file(const char *name, size_t *len, char *password)
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{
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FILE *fp;
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EVP_PKEY *key = NULL;
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BIO *bio = NULL;
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char *data;
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uint8_t *buf = NULL;
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struct stat st;
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size_t size = 0;
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int fd = -1;
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ssize_t n;
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*len = 0;
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if ((fd = open(name, O_RDONLY)) == -1)
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return (NULL);
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/* Just load the file into memory without decryption */
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if (password == NULL) {
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if (fstat(fd, &st) != 0)
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goto err;
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if (st.st_size < 0)
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goto err;
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size = (size_t)st.st_size;
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if ((buf = malloc(size)) == NULL)
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goto err;
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n = read(fd, buf, size);
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if (n < 0 || (size_t)n != size)
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goto err;
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close(fd);
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goto done;
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}
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/* Or read the (possibly) encrypted key from file */
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if ((fp = fdopen(fd, "r")) == NULL)
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goto err;
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fd = -1;
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key = PEM_read_PrivateKey(fp, NULL, tls_password_cb, password);
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fclose(fp);
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if (key == NULL)
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goto err;
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/* Write unencrypted key to memory buffer */
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if ((bio = BIO_new(BIO_s_mem())) == NULL)
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goto err;
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if (!PEM_write_bio_PrivateKey(bio, key, NULL, NULL, 0, NULL, NULL))
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goto err;
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if ((size = BIO_get_mem_data(bio, &data)) <= 0)
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goto err;
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if ((buf = malloc(size)) == NULL)
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goto err;
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memcpy(buf, data, size);
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BIO_free_all(bio);
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EVP_PKEY_free(key);
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done:
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*len = size;
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return (buf);
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err:
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if (fd != -1)
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close(fd);
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freezero(buf, size);
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BIO_free_all(bio);
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EVP_PKEY_free(key);
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return (NULL);
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}
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void
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tls_unload_file(uint8_t *buf, size_t len)
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{
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freezero(buf, len);
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}
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