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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | /* Extract X.509 certificate in DER form from PKCS#11 or PEM. * * Copyright © 2014-2015 Red Hat, Inc. All Rights Reserved. * Copyright © 2015 Intel Corporation. * * Authors: David Howells <dhowells@redhat.com> * David Woodhouse <dwmw2@infradead.org> * * This program 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 licence, or (at your option) any later version. */ #define _GNU_SOURCE #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <stdbool.h> #include <string.h> #include <err.h> #include <openssl/bio.h> #include <openssl/pem.h> #include <openssl/err.h> #include <openssl/engine.h> /* * OpenSSL 3.0 deprecates the OpenSSL's ENGINE API. * * Remove this if/when that API is no longer used */ #pragma GCC diagnostic ignored "-Wdeprecated-declarations" #define PKEY_ID_PKCS7 2 static __attribute__((noreturn)) void format(void) { fprintf(stderr, "Usage: extract-cert <source> <dest>\n"); exit(2); } static void display_openssl_errors(int l) { const char *file; char buf[120]; int e, line; if (ERR_peek_error() == 0) return; fprintf(stderr, "At main.c:%d:\n", l); while ((e = ERR_get_error_line(&file, &line))) { ERR_error_string(e, buf); fprintf(stderr, "- SSL %s: %s:%d\n", buf, file, line); } } static void drain_openssl_errors(void) { const char *file; int line; if (ERR_peek_error() == 0) return; while (ERR_get_error_line(&file, &line)) {} } #define ERR(cond, fmt, ...) \ do { \ bool __cond = (cond); \ display_openssl_errors(__LINE__); \ if (__cond) { \ err(1, fmt, ## __VA_ARGS__); \ } \ } while(0) static const char *key_pass; static BIO *wb; static char *cert_dst; static int kbuild_verbose; static void write_cert(X509 *x509) { char buf[200]; if (!wb) { wb = BIO_new_file(cert_dst, "wb"); ERR(!wb, "%s", cert_dst); } X509_NAME_oneline(X509_get_subject_name(x509), buf, sizeof(buf)); ERR(!i2d_X509_bio(wb, x509), "%s", cert_dst); if (kbuild_verbose) fprintf(stderr, "Extracted cert: %s\n", buf); } int main(int argc, char **argv) { char *cert_src; OpenSSL_add_all_algorithms(); ERR_load_crypto_strings(); ERR_clear_error(); kbuild_verbose = atoi(getenv("KBUILD_VERBOSE")?:"0"); key_pass = getenv("KBUILD_SIGN_PIN"); if (argc != 3) format(); cert_src = argv[1]; cert_dst = argv[2]; if (!cert_src[0]) { /* Invoked with no input; create empty file */ FILE *f = fopen(cert_dst, "wb"); ERR(!f, "%s", cert_dst); fclose(f); exit(0); } else if (!strncmp(cert_src, "pkcs11:", 7)) { ENGINE *e; struct { const char *cert_id; X509 *cert; } parms; parms.cert_id = cert_src; parms.cert = NULL; ENGINE_load_builtin_engines(); drain_openssl_errors(); e = ENGINE_by_id("pkcs11"); ERR(!e, "Load PKCS#11 ENGINE"); if (ENGINE_init(e)) drain_openssl_errors(); else ERR(1, "ENGINE_init"); if (key_pass) ERR(!ENGINE_ctrl_cmd_string(e, "PIN", key_pass, 0), "Set PKCS#11 PIN"); ENGINE_ctrl_cmd(e, "LOAD_CERT_CTRL", 0, &parms, NULL, 1); ERR(!parms.cert, "Get X.509 from PKCS#11"); write_cert(parms.cert); } else { BIO *b; X509 *x509; b = BIO_new_file(cert_src, "rb"); ERR(!b, "%s", cert_src); while (1) { x509 = PEM_read_bio_X509(b, NULL, NULL, NULL); if (wb && !x509) { unsigned long err = ERR_peek_last_error(); if (ERR_GET_LIB(err) == ERR_LIB_PEM && ERR_GET_REASON(err) == PEM_R_NO_START_LINE) { ERR_clear_error(); break; } } ERR(!x509, "%s", cert_src); write_cert(x509); } } BIO_free(wb); return 0; } |