| /* |
| * Embedded Linux library |
| * |
| * Copyright (C) 2018 Intel Corporation. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include <stdio.h> |
| #include <errno.h> |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <sys/mman.h> |
| |
| #include <ell/ell.h> |
| #include "ell/tls-private.h" |
| |
| static int load_cert_chain(const char *file, struct l_certchain **certchain) |
| { |
| int fd; |
| struct stat st; |
| char *data; |
| int err; |
| |
| fd = open(file, O_RDONLY); |
| if (fd < 0) { |
| fprintf(stderr, "Could not open %s: %s\n", |
| file, strerror(errno)); |
| return -errno; |
| } |
| |
| if (fstat(fd, &st) < 0) { |
| err = -errno; |
| fprintf(stderr, "Could not stat %s: %s\n", |
| file, strerror(errno)); |
| goto close_file; |
| } |
| |
| if (st.st_size == 0) { |
| err = -EINVAL; |
| fprintf(stderr, "Certificate file %s is empty!\n", file); |
| goto close_file; |
| } |
| |
| data = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0); |
| if (data == MAP_FAILED) { |
| err = -errno; |
| fprintf(stderr, "Could not mmap %s: %s\n", |
| file, strerror(errno)); |
| goto close_file; |
| } |
| |
| err = tls_parse_certificate_list(data, st.st_size, certchain); |
| if (err < 0) |
| fprintf(stderr, "Could not parse certificate list: %s\n", |
| strerror(-err)); |
| |
| munmap(data, st.st_size); |
| |
| close_file: |
| close(fd); |
| return err; |
| } |
| |
| static void usage(const char *bin) |
| { |
| printf("%s - TLS certificate chain verification utility\n\n", bin); |
| |
| printf("Usage: %s [options] <ca_cert file> <raw certificates file>\n" |
| " <ca_cert file> - local CA Certificate to validate against\n" |
| " <raw certificates file> - Certificates obtained from PCAP\n" |
| " --help\n\n", bin); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| int status = EXIT_FAILURE; |
| struct l_certchain *certchain; |
| struct l_queue *ca_certs; |
| int err; |
| const char *error_str; |
| |
| if (argc != 3) { |
| usage(argv[0]); |
| return -1; |
| } |
| |
| l_log_set_stderr(); |
| |
| err = load_cert_chain(argv[2], &certchain); |
| if (err < 0) |
| goto done; |
| |
| if (!certchain) { |
| status = EXIT_SUCCESS; |
| fprintf(stdout, "Certchain is empty, nothing to do\n"); |
| goto done; |
| } |
| |
| ca_certs = l_pem_load_certificate_list(argv[1]); |
| if (!ca_certs) { |
| fprintf(stderr, "Unable to load CA certifiates\n"); |
| goto free_certchain; |
| } |
| |
| if (!l_certchain_verify(certchain, ca_certs, &error_str)) { |
| fprintf(stderr, "Verification failed: %s\n", error_str); |
| goto free_cacert; |
| } |
| |
| fprintf(stdout, "Verification succeeded\n"); |
| status = EXIT_SUCCESS; |
| |
| free_cacert: |
| l_queue_destroy(ca_certs, (l_queue_destroy_func_t) l_cert_free); |
| free_certchain: |
| l_certchain_free(certchain); |
| done: |
| return status; |
| } |