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git.proxmox.com Git - mirror_ubuntu-kernels.git/blob - certs/extract-cert.c
1 /* Extract X.509 certificate in DER form from PKCS#11 or PEM.
3 * Copyright © 2014-2015 Red Hat, Inc. All Rights Reserved.
4 * Copyright © 2015 Intel Corporation.
6 * Authors: David Howells <dhowells@redhat.com>
7 * David Woodhouse <dwmw2@infradead.org>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public License
11 * as published by the Free Software Foundation; either version 2.1
12 * of the licence, or (at your option) any later version.
21 #include <openssl/bio.h>
22 #include <openssl/pem.h>
23 #include <openssl/err.h>
24 #include <openssl/engine.h>
27 * OpenSSL 3.0 deprecates the OpenSSL's ENGINE API.
29 * Remove this if/when that API is no longer used
31 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
33 #define PKEY_ID_PKCS7 2
35 static __attribute__((noreturn
))
39 "Usage: extract-cert <source> <dest>\n");
43 static void display_openssl_errors(int l
)
49 if (ERR_peek_error() == 0)
51 fprintf(stderr
, "At main.c:%d:\n", l
);
53 while ((e
= ERR_get_error_line(&file
, &line
))) {
54 ERR_error_string(e
, buf
);
55 fprintf(stderr
, "- SSL %s: %s:%d\n", buf
, file
, line
);
59 static void drain_openssl_errors(void)
64 if (ERR_peek_error() == 0)
66 while (ERR_get_error_line(&file
, &line
)) {}
69 #define ERR(cond, fmt, ...) \
71 bool __cond = (cond); \
72 display_openssl_errors(__LINE__); \
74 err(1, fmt, ## __VA_ARGS__); \
78 static const char *key_pass
;
80 static char *cert_dst
;
81 static int kbuild_verbose
;
83 static void write_cert(X509
*x509
)
88 wb
= BIO_new_file(cert_dst
, "wb");
89 ERR(!wb
, "%s", cert_dst
);
91 X509_NAME_oneline(X509_get_subject_name(x509
), buf
, sizeof(buf
));
92 ERR(!i2d_X509_bio(wb
, x509
), "%s", cert_dst
);
94 fprintf(stderr
, "Extracted cert: %s\n", buf
);
97 int main(int argc
, char **argv
)
101 OpenSSL_add_all_algorithms();
102 ERR_load_crypto_strings();
105 kbuild_verbose
= atoi(getenv("KBUILD_VERBOSE")?:"0");
107 key_pass
= getenv("KBUILD_SIGN_PIN");
116 /* Invoked with no input; create empty file */
117 FILE *f
= fopen(cert_dst
, "wb");
118 ERR(!f
, "%s", cert_dst
);
121 } else if (!strncmp(cert_src
, "pkcs11:", 7)) {
128 parms
.cert_id
= cert_src
;
131 ENGINE_load_builtin_engines();
132 drain_openssl_errors();
133 e
= ENGINE_by_id("pkcs11");
134 ERR(!e
, "Load PKCS#11 ENGINE");
136 drain_openssl_errors();
138 ERR(1, "ENGINE_init");
140 ERR(!ENGINE_ctrl_cmd_string(e
, "PIN", key_pass
, 0), "Set PKCS#11 PIN");
141 ENGINE_ctrl_cmd(e
, "LOAD_CERT_CTRL", 0, &parms
, NULL
, 1);
142 ERR(!parms
.cert
, "Get X.509 from PKCS#11");
143 write_cert(parms
.cert
);
148 b
= BIO_new_file(cert_src
, "rb");
149 ERR(!b
, "%s", cert_src
);
152 x509
= PEM_read_bio_X509(b
, NULL
, NULL
, NULL
);
154 unsigned long err
= ERR_peek_last_error();
155 if (ERR_GET_LIB(err
) == ERR_LIB_PEM
&&
156 ERR_GET_REASON(err
) == PEM_R_NO_START_LINE
) {
161 ERR(!x509
, "%s", cert_src
);