1 /* Extract X.509 certificate in DER form from 1 /* Extract X.509 certificate in DER form from PKCS#11 or PEM.
2 * 2 *
3 * Copyright © 2014-2015 Red Hat, Inc. All Ri 3 * Copyright © 2014-2015 Red Hat, Inc. All Rights Reserved.
4 * Copyright © 2015 Intel Corporation. 4 * Copyright © 2015 Intel Corporation.
5 * 5 *
6 * Authors: David Howells <dhowells@redhat.com 6 * Authors: David Howells <dhowells@redhat.com>
7 * David Woodhouse <dwmw2@infradead.o 7 * David Woodhouse <dwmw2@infradead.org>
8 * 8 *
9 * This program is free software; you can redi 9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser 10 * modify it under the terms of the GNU Lesser General Public License
11 * as published by the Free Software Foundatio 11 * as published by the Free Software Foundation; either version 2.1
12 * of the licence, or (at your option) any lat 12 * of the licence, or (at your option) any later version.
13 */ 13 */
14 #define _GNU_SOURCE 14 #define _GNU_SOURCE
15 #include <stdio.h> 15 #include <stdio.h>
16 #include <stdlib.h> 16 #include <stdlib.h>
17 #include <stdint.h> 17 #include <stdint.h>
18 #include <stdbool.h> 18 #include <stdbool.h>
19 #include <string.h> 19 #include <string.h>
20 #include <err.h> 20 #include <err.h>
21 #include <openssl/bio.h> 21 #include <openssl/bio.h>
22 #include <openssl/pem.h> 22 #include <openssl/pem.h>
23 #include <openssl/err.h> 23 #include <openssl/err.h>
24 #include <openssl/engine.h> 24 #include <openssl/engine.h>
25 25
26 /* 26 /*
27 * OpenSSL 3.0 deprecates the OpenSSL's ENGINE 27 * OpenSSL 3.0 deprecates the OpenSSL's ENGINE API.
28 * 28 *
29 * Remove this if/when that API is no longer u 29 * Remove this if/when that API is no longer used
30 */ 30 */
31 #pragma GCC diagnostic ignored "-Wdeprecated-d 31 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
32 32
33 #define PKEY_ID_PKCS7 2 33 #define PKEY_ID_PKCS7 2
34 34
35 static __attribute__((noreturn)) 35 static __attribute__((noreturn))
36 void format(void) 36 void format(void)
37 { 37 {
38 fprintf(stderr, 38 fprintf(stderr,
39 "Usage: extract-cert <source> 39 "Usage: extract-cert <source> <dest>\n");
40 exit(2); 40 exit(2);
41 } 41 }
42 42
43 static void display_openssl_errors(int l) 43 static void display_openssl_errors(int l)
44 { 44 {
45 const char *file; 45 const char *file;
46 char buf[120]; 46 char buf[120];
47 int e, line; 47 int e, line;
48 48
49 if (ERR_peek_error() == 0) 49 if (ERR_peek_error() == 0)
50 return; 50 return;
51 fprintf(stderr, "At main.c:%d:\n", l); 51 fprintf(stderr, "At main.c:%d:\n", l);
52 52
53 while ((e = ERR_get_error_line(&file, 53 while ((e = ERR_get_error_line(&file, &line))) {
54 ERR_error_string(e, buf); 54 ERR_error_string(e, buf);
55 fprintf(stderr, "- SSL %s: %s: 55 fprintf(stderr, "- SSL %s: %s:%d\n", buf, file, line);
56 } 56 }
57 } 57 }
58 58
59 static void drain_openssl_errors(void) 59 static void drain_openssl_errors(void)
60 { 60 {
61 const char *file; 61 const char *file;
62 int line; 62 int line;
63 63
64 if (ERR_peek_error() == 0) 64 if (ERR_peek_error() == 0)
65 return; 65 return;
66 while (ERR_get_error_line(&file, &line 66 while (ERR_get_error_line(&file, &line)) {}
67 } 67 }
68 68
69 #define ERR(cond, fmt, ...) 69 #define ERR(cond, fmt, ...) \
70 do { 70 do { \
71 bool __cond = (cond); 71 bool __cond = (cond); \
72 display_openssl_errors(__LINE_ 72 display_openssl_errors(__LINE__); \
73 if (__cond) { 73 if (__cond) { \
74 err(1, fmt, ## __VA_AR 74 err(1, fmt, ## __VA_ARGS__); \
75 } 75 } \
76 } while(0) 76 } while(0)
77 77
78 static const char *key_pass; 78 static const char *key_pass;
79 static BIO *wb; 79 static BIO *wb;
80 static char *cert_dst; 80 static char *cert_dst;
81 static bool verbose; 81 static bool verbose;
82 82
83 static void write_cert(X509 *x509) 83 static void write_cert(X509 *x509)
84 { 84 {
85 char buf[200]; 85 char buf[200];
86 86
87 if (!wb) { 87 if (!wb) {
88 wb = BIO_new_file(cert_dst, "w 88 wb = BIO_new_file(cert_dst, "wb");
89 ERR(!wb, "%s", cert_dst); 89 ERR(!wb, "%s", cert_dst);
90 } 90 }
91 X509_NAME_oneline(X509_get_subject_nam 91 X509_NAME_oneline(X509_get_subject_name(x509), buf, sizeof(buf));
92 ERR(!i2d_X509_bio(wb, x509), "%s", cer 92 ERR(!i2d_X509_bio(wb, x509), "%s", cert_dst);
93 if (verbose) 93 if (verbose)
94 fprintf(stderr, "Extracted cer 94 fprintf(stderr, "Extracted cert: %s\n", buf);
95 } 95 }
96 96
97 int main(int argc, char **argv) 97 int main(int argc, char **argv)
98 { 98 {
99 char *cert_src; 99 char *cert_src;
100 char *verbose_env; 100 char *verbose_env;
101 101
102 OpenSSL_add_all_algorithms(); 102 OpenSSL_add_all_algorithms();
103 ERR_load_crypto_strings(); 103 ERR_load_crypto_strings();
104 ERR_clear_error(); 104 ERR_clear_error();
105 105
106 verbose_env = getenv("KBUILD_VERBOSE") 106 verbose_env = getenv("KBUILD_VERBOSE");
107 if (verbose_env && strchr(verbose_env, 107 if (verbose_env && strchr(verbose_env, '1'))
108 verbose = true; 108 verbose = true;
109 109
110 key_pass = getenv("KBUILD_SIGN_PIN"); 110 key_pass = getenv("KBUILD_SIGN_PIN");
111 111
112 if (argc != 3) 112 if (argc != 3)
113 format(); 113 format();
114 114
115 cert_src = argv[1]; 115 cert_src = argv[1];
116 cert_dst = argv[2]; 116 cert_dst = argv[2];
117 117
118 if (!cert_src[0]) { 118 if (!cert_src[0]) {
119 /* Invoked with no input; crea 119 /* Invoked with no input; create empty file */
120 FILE *f = fopen(cert_dst, "wb" 120 FILE *f = fopen(cert_dst, "wb");
121 ERR(!f, "%s", cert_dst); 121 ERR(!f, "%s", cert_dst);
122 fclose(f); 122 fclose(f);
123 exit(0); 123 exit(0);
124 } else if (!strncmp(cert_src, "pkcs11: 124 } else if (!strncmp(cert_src, "pkcs11:", 7)) {
125 ENGINE *e; 125 ENGINE *e;
126 struct { 126 struct {
127 const char *cert_id; 127 const char *cert_id;
128 X509 *cert; 128 X509 *cert;
129 } parms; 129 } parms;
130 130
131 parms.cert_id = cert_src; 131 parms.cert_id = cert_src;
132 parms.cert = NULL; 132 parms.cert = NULL;
133 133
134 ENGINE_load_builtin_engines(); 134 ENGINE_load_builtin_engines();
135 drain_openssl_errors(); 135 drain_openssl_errors();
136 e = ENGINE_by_id("pkcs11"); 136 e = ENGINE_by_id("pkcs11");
137 ERR(!e, "Load PKCS#11 ENGINE") 137 ERR(!e, "Load PKCS#11 ENGINE");
138 if (ENGINE_init(e)) 138 if (ENGINE_init(e))
139 drain_openssl_errors() 139 drain_openssl_errors();
140 else 140 else
141 ERR(1, "ENGINE_init"); 141 ERR(1, "ENGINE_init");
142 if (key_pass) 142 if (key_pass)
143 ERR(!ENGINE_ctrl_cmd_s 143 ERR(!ENGINE_ctrl_cmd_string(e, "PIN", key_pass, 0), "Set PKCS#11 PIN");
144 ENGINE_ctrl_cmd(e, "LOAD_CERT_ 144 ENGINE_ctrl_cmd(e, "LOAD_CERT_CTRL", 0, &parms, NULL, 1);
145 ERR(!parms.cert, "Get X.509 fr 145 ERR(!parms.cert, "Get X.509 from PKCS#11");
146 write_cert(parms.cert); 146 write_cert(parms.cert);
147 } else { 147 } else {
148 BIO *b; 148 BIO *b;
149 X509 *x509; 149 X509 *x509;
150 150
151 b = BIO_new_file(cert_src, "rb 151 b = BIO_new_file(cert_src, "rb");
152 ERR(!b, "%s", cert_src); 152 ERR(!b, "%s", cert_src);
153 153
154 while (1) { 154 while (1) {
155 x509 = PEM_read_bio_X5 155 x509 = PEM_read_bio_X509(b, NULL, NULL, NULL);
156 if (wb && !x509) { 156 if (wb && !x509) {
157 unsigned long 157 unsigned long err = ERR_peek_last_error();
158 if (ERR_GET_LI 158 if (ERR_GET_LIB(err) == ERR_LIB_PEM &&
159 ERR_GET_RE 159 ERR_GET_REASON(err) == PEM_R_NO_START_LINE) {
160 ERR_cl 160 ERR_clear_error();
161 break; 161 break;
162 } 162 }
163 } 163 }
164 ERR(!x509, "%s", cert_ 164 ERR(!x509, "%s", cert_src);
165 write_cert(x509); 165 write_cert(x509);
166 } 166 }
167 } 167 }
168 168
169 BIO_free(wb); 169 BIO_free(wb);
170 170
171 return 0; 171 return 0;
172 } 172 }
173 173
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