1 /*- 2 * Copyright (c) 2018, Juniper Networks, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 16 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 17 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 19 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 #include <sys/cdefs.h> 26 __FBSDID("$FreeBSD$"); 27 28 #include <libsecureboot.h> 29 30 #include <vse.h> 31 32 /** 33 * @brief 34 * verify signed file 35 * 36 * We look for a signature using the extensions 37 * recorded in signature_exts. 38 * If we find a match we pass it to a suitable verify method. 39 * 40 * @return content of verified file or NULL on error. 41 */ 42 unsigned char * 43 verify_signed(const char *filename, int flags) 44 { 45 struct stat st; 46 char buf[MAXPATHLEN]; 47 const char **se; 48 49 for (se = signature_exts; *se; se++) { 50 snprintf(buf, sizeof(buf), "%s.%s", filename, *se); 51 if (stat(buf, &st) < 0 || !S_ISREG(st.st_mode)) 52 continue; 53 DEBUG_PRINTF(5, ("verify_signed: %s\n", buf)); 54 #ifdef VE_OPENPGP_SUPPORT 55 if (strncmp(*se, "asc", 3) == 0) 56 return (verify_asc(buf, flags)); 57 #endif 58 return (verify_sig(buf, flags)); 59 } 60 return (NULL); 61 } 62