[mirror_ubuntu-bionic-kernel.git] / scripts / sign-file.c

/* Sign a module file using the given key.
 *
 * Copyright © 2014-2016 Red Hat, Inc. All Rights Reserved.
 * Copyright © 2015      Intel Corporation.
 * Copyright © 2016      Hewlett Packard Enterprise Development LP
 *
 * Authors: David Howells <dhowells@redhat.com>
 *          David Woodhouse <dwmw2@infradead.org>
 *          Juerg Haefliger <juerg.haefliger@hpe.com>
 *
 * 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 <getopt.h>
#include <err.h>
#include <arpa/inet.h>
#include <openssl/opensslv.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/engine.h>

/*
 * Use CMS if we have openssl-1.0.0 or newer available - otherwise we have to
 * assume that it's not available and its header file is missing and that we
 * should use PKCS#7 instead.  Switching to the older PKCS#7 format restricts
 * the options we have on specifying the X.509 certificate we want.
 *
 * Further, older versions of OpenSSL don't support manually adding signers to
 * the PKCS#7 message so have to accept that we get a certificate included in
 * the signature message.  Nor do such older versions of OpenSSL support
 * signing with anything other than SHA1 - so we're stuck with that if such is
 * the case.
 */
#if defined(LIBRESSL_VERSION_NUMBER) || \
	OPENSSL_VERSION_NUMBER < 0x10000000L || \
	defined(OPENSSL_NO_CMS)
#define USE_PKCS7
#endif
#ifndef USE_PKCS7
#include <openssl/cms.h>
#else
#include <openssl/pkcs7.h>
#endif

struct module_signature {
	uint8_t		algo;		/* Public-key crypto algorithm [0] */
	uint8_t		hash;		/* Digest algorithm [0] */
	uint8_t		id_type;	/* Key identifier type [PKEY_ID_PKCS7] */
	uint8_t		signer_len;	/* Length of signer's name [0] */
	uint8_t		key_id_len;	/* Length of key identifier [0] */
	uint8_t		__pad[3];
	uint32_t	sig_len;	/* Length of signature data */
};

#define PKEY_ID_PKCS7 2

static char magic_number[] = "~Module signature appended~\n";

static __attribute__((noreturn))
void format(void)
{
	fprintf(stderr,
		"Usage: scripts/sign-file [-dp] <hash algo> <key> <x509> <module> [<dest>]\n");
	fprintf(stderr,
		"       scripts/sign-file -s <raw sig> <hash algo> <x509> <module> [<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 int pem_pw_cb(char *buf, int len, int w, void *v)
{
	int pwlen;

	if (!key_pass)
		return -1;

	pwlen = strlen(key_pass);
	if (pwlen >= len)
		return -1;

	strcpy(buf, key_pass);

	/* If it's wrong, don't keep trying it. */
	key_pass = NULL;

	return pwlen;
}

static EVP_PKEY *read_private_key(const char *private_key_name)
{
	EVP_PKEY *private_key;

	if (!strncmp(private_key_name, "pkcs11:", 7)) {
		ENGINE *e;

		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");
		private_key = ENGINE_load_private_key(e, private_key_name,
						      NULL, NULL);
		ERR(!private_key, "%s", private_key_name);
	} else {
		BIO *b;

		b = BIO_new_file(private_key_name, "rb");
		ERR(!b, "%s", private_key_name);
		private_key = PEM_read_bio_PrivateKey(b, NULL, pem_pw_cb,
						      NULL);
		ERR(!private_key, "%s", private_key_name);
		BIO_free(b);
	}

	return private_key;
}

static X509 *read_x509(const char *x509_name)
{
	unsigned char buf[2];
	X509 *x509;
	BIO *b;
	int n;

	b = BIO_new_file(x509_name, "rb");
	ERR(!b, "%s", x509_name);

	/* Look at the first two bytes of the file to determine the encoding */
	n = BIO_read(b, buf, 2);
	if (n != 2) {
		if (BIO_should_retry(b)) {
			fprintf(stderr, "%s: Read wanted retry\n", x509_name);
			exit(1);
		}
		if (n >= 0) {
			fprintf(stderr, "%s: Short read\n", x509_name);
			exit(1);
		}
		ERR(1, "%s", x509_name);
	}

	ERR(BIO_reset(b) != 0, "%s", x509_name);

	if (buf[0] == 0x30 && buf[1] >= 0x81 && buf[1] <= 0x84)
		/* Assume raw DER encoded X.509 */
		x509 = d2i_X509_bio(b, NULL);
	else
		/* Assume PEM encoded X.509 */
		x509 = PEM_read_bio_X509(b, NULL, NULL, NULL);

	BIO_free(b);
	ERR(!x509, "%s", x509_name);

	return x509;
}

int main(int argc, char **argv)
{
	struct module_signature sig_info = { .id_type = PKEY_ID_PKCS7 };
	char *hash_algo = NULL;
	char *private_key_name = NULL, *raw_sig_name = NULL;
	char *x509_name, *module_name, *dest_name;
	bool save_sig = false, replace_orig;
	bool sign_only = false;
	bool raw_sig = false;
	unsigned char buf[4096];
	unsigned long module_size, sig_size;
	unsigned int use_signed_attrs;
	const EVP_MD *digest_algo;
	EVP_PKEY *private_key;
#ifndef USE_PKCS7
	CMS_ContentInfo *cms = NULL;
	unsigned int use_keyid = 0;
#else
	PKCS7 *pkcs7 = NULL;
#endif
	X509 *x509;
	BIO *bd, *bm;
	int opt, n;
	OpenSSL_add_all_algorithms();
	ERR_load_crypto_strings();
	ERR_clear_error();

	key_pass = getenv("KBUILD_SIGN_PIN");

#ifndef USE_PKCS7
	use_signed_attrs = CMS_NOATTR;
#else
	use_signed_attrs = PKCS7_NOATTR;
#endif

	do {
		opt = getopt(argc, argv, "sdpk");
		switch (opt) {
		case 's': raw_sig = true; break;
		case 'p': save_sig = true; break;
		case 'd': sign_only = true; save_sig = true; break;
#ifndef USE_PKCS7
		case 'k': use_keyid = CMS_USE_KEYID; break;
#endif
		case -1: break;
		default: format();
		}
	} while (opt != -1);

	argc -= optind;
	argv += optind;
	if (argc < 4 || argc > 5)
		format();

	if (raw_sig) {
		raw_sig_name = argv[0];
		hash_algo = argv[1];
	} else {
		hash_algo = argv[0];
		private_key_name = argv[1];
	}
	x509_name = argv[2];
	module_name = argv[3];
	if (argc == 5 && strcmp(argv[3], argv[4]) != 0) {
		dest_name = argv[4];
		replace_orig = false;
	} else {
		ERR(asprintf(&dest_name, "%s.~signed~", module_name) < 0,
		    "asprintf");
		replace_orig = true;
	}

#ifdef USE_PKCS7
	if (strcmp(hash_algo, "sha1") != 0) {
		fprintf(stderr, "sign-file: %s only supports SHA1 signing\n",
			OPENSSL_VERSION_TEXT);
		exit(3);
	}
#endif

	/* Open the module file */
	bm = BIO_new_file(module_name, "rb");
	ERR(!bm, "%s", module_name);

	if (!raw_sig) {
		/* Read the private key and the X.509 cert the PKCS#7 message
		 * will point to.
		 */
		private_key = read_private_key(private_key_name);
		x509 = read_x509(x509_name);

		/* Digest the module data. */
		OpenSSL_add_all_digests();
		display_openssl_errors(__LINE__);
		digest_algo = EVP_get_digestbyname(hash_algo);
		ERR(!digest_algo, "EVP_get_digestbyname");

#ifndef USE_PKCS7
		/* Load the signature message from the digest buffer. */
		cms = CMS_sign(NULL, NULL, NULL, NULL,
			       CMS_NOCERTS | CMS_PARTIAL | CMS_BINARY |
			       CMS_DETACHED | CMS_STREAM);
		ERR(!cms, "CMS_sign");

		ERR(!CMS_add1_signer(cms, x509, private_key, digest_algo,
				     CMS_NOCERTS | CMS_BINARY |
				     CMS_NOSMIMECAP | use_keyid |
				     use_signed_attrs),
		    "CMS_add1_signer");
		ERR(CMS_final(cms, bm, NULL, CMS_NOCERTS | CMS_BINARY) < 0,
		    "CMS_final");

#else
		pkcs7 = PKCS7_sign(x509, private_key, NULL, bm,
				   PKCS7_NOCERTS | PKCS7_BINARY |
				   PKCS7_DETACHED | use_signed_attrs);
		ERR(!pkcs7, "PKCS7_sign");
#endif

		if (save_sig) {
			char *sig_file_name;
			BIO *b;

			ERR(asprintf(&sig_file_name, "%s.p7s", module_name) < 0,
			    "asprintf");
			b = BIO_new_file(sig_file_name, "wb");
			ERR(!b, "%s", sig_file_name);
#ifndef USE_PKCS7
			ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) < 0,
			    "%s", sig_file_name);
#else
			ERR(i2d_PKCS7_bio(b, pkcs7) < 0,
			    "%s", sig_file_name);
#endif
			BIO_free(b);
		}

		if (sign_only) {
			BIO_free(bm);
			return 0;
		}
	}

	/* Open the destination file now so that we can shovel the module data
	 * across as we read it.
	 */
	bd = BIO_new_file(dest_name, "wb");
	ERR(!bd, "%s", dest_name);

	/* Append the marker and the PKCS#7 message to the destination file */
	ERR(BIO_reset(bm) < 0, "%s", module_name);
	while ((n = BIO_read(bm, buf, sizeof(buf))),
	       n > 0) {
		ERR(BIO_write(bd, buf, n) < 0, "%s", dest_name);
	}
	BIO_free(bm);
	ERR(n < 0, "%s", module_name);
	module_size = BIO_number_written(bd);

	if (!raw_sig) {
#ifndef USE_PKCS7
		ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) < 0, "%s", dest_name);
#else
		ERR(i2d_PKCS7_bio(bd, pkcs7) < 0, "%s", dest_name);
#endif
	} else {
		BIO *b;

		/* Read the raw signature file and write the data to the
		 * destination file
		 */
		b = BIO_new_file(raw_sig_name, "rb");
		ERR(!b, "%s", raw_sig_name);
		while ((n = BIO_read(b, buf, sizeof(buf))), n > 0)
			ERR(BIO_write(bd, buf, n) < 0, "%s", dest_name);
		BIO_free(b);
	}

	sig_size = BIO_number_written(bd) - module_size;
	sig_info.sig_len = htonl(sig_size);
	ERR(BIO_write(bd, &sig_info, sizeof(sig_info)) < 0, "%s", dest_name);
	ERR(BIO_write(bd, magic_number, sizeof(magic_number) - 1) < 0, "%s", dest_name);

	ERR(BIO_free(bd) < 0, "%s", dest_name);

	/* Finally, if we're signing in place, replace the original. */
	if (replace_orig)
		ERR(rename(dest_name, module_name) < 0, "%s", dest_name);

	return 0;
}
Commit	Line	Data
bc1c373d DH	1	/* Sign a module file using the given key.
bc1c373d DH	2	*
9552c7ae	3	* Copyright © 2014-2016 Red Hat, Inc. All Rights Reserved.
09a77a88	4	* Copyright © 2015 Intel Corporation.
e5a2e3c8	5	* Copyright © 2016 Hewlett Packard Enterprise Development LP
09a77a88 DW	6	*
	7	* Authors: David Howells <dhowells@redhat.com>
	8	* David Woodhouse <dwmw2@infradead.org>
e5a2e3c8	9	* Juerg Haefliger <juerg.haefliger@hpe.com>
bc1c373d DH	10	*
bc1c373d DH	11	* This program is free software; you can redistribute it and/or
09a77a88 DW	12	* modify it under the terms of the GNU Lesser General Public License
	13	* as published by the Free Software Foundation; either version 2.1
	14	* of the licence, or (at your option) any later version.
bc1c373d DH	15	*/
	16	#define _GNU_SOURCE
	17	#include <stdio.h>
	18	#include <stdlib.h>
	19	#include <stdint.h>
	20	#include <stdbool.h>
	21	#include <string.h>
	22	#include <getopt.h>
	23	#include <err.h>
	24	#include <arpa/inet.h>
283e8ba2	25	#include <openssl/opensslv.h>
bc1c373d DH	26	#include <openssl/bio.h>
	27	#include <openssl/evp.h>
	28	#include <openssl/pem.h>
bc1c373d	29	#include <openssl/err.h>
6e3e281f	30	#include <openssl/engine.h>
bc1c373d	31
283e8ba2 DH	32	/*
	33	* Use CMS if we have openssl-1.0.0 or newer available - otherwise we have to
	34	* assume that it's not available and its header file is missing and that we
	35	* should use PKCS#7 instead. Switching to the older PKCS#7 format restricts
	36	* the options we have on specifying the X.509 certificate we want.
	37	*
	38	* Further, older versions of OpenSSL don't support manually adding signers to
	39	* the PKCS#7 message so have to accept that we get a certificate included in
	40	* the signature message. Nor do such older versions of OpenSSL support
	41	* signing with anything other than SHA1 - so we're stuck with that if such is
	42	* the case.
	43	*/
f8688017 FF	44	#if defined(LIBRESSL_VERSION_NUMBER) \|\| \
	45	OPENSSL_VERSION_NUMBER < 0x10000000L \|\| \
	46	defined(OPENSSL_NO_CMS)
283e8ba2 DH	47	#define USE_PKCS7
	48	#endif
	49	#ifndef USE_PKCS7
	50	#include <openssl/cms.h>
	51	#else
	52	#include <openssl/pkcs7.h>
	53	#endif
	54
bc1c373d DH	55	struct module_signature {
	56	uint8_t algo; /* Public-key crypto algorithm [0] */
	57	uint8_t hash; /* Digest algorithm [0] */
	58	uint8_t id_type; /* Key identifier type [PKEY_ID_PKCS7] */
	59	uint8_t signer_len; /* Length of signer's name [0] */
	60	uint8_t key_id_len; /* Length of key identifier [0] */
	61	uint8_t __pad[3];
	62	uint32_t sig_len; /* Length of signature data */
	63	};
	64
	65	#define PKEY_ID_PKCS7 2
	66
	67	static char magic_number[] = "~Module signature appended~\n";
	68
	69	static __attribute__((noreturn))
	70	void format(void)
	71	{
	72	fprintf(stderr,
	73	"Usage: scripts/sign-file [-dp] <hash algo> <key> <x509> <module> [<dest>]\n");
e5a2e3c8 JH	74	fprintf(stderr,
e5a2e3c8 JH	75	" scripts/sign-file -s <raw sig> <hash algo> <x509> <module> [<dest>]\n");
bc1c373d DH	76	exit(2);
	77	}
	78
	79	static void display_openssl_errors(int l)
	80	{
	81	const char *file;
	82	char buf[120];
	83	int e, line;
	84
	85	if (ERR_peek_error() == 0)
	86	return;
	87	fprintf(stderr, "At main.c:%d:\n", l);
	88
	89	while ((e = ERR_get_error_line(&file, &line))) {
	90	ERR_error_string(e, buf);
	91	fprintf(stderr, "- SSL %s: %s:%d\n", buf, file, line);
	92	}
	93	}
	94
	95	static void drain_openssl_errors(void)
	96	{
	97	const char *file;
	98	int line;
	99
	100	if (ERR_peek_error() == 0)
	101	return;
	102	while (ERR_get_error_line(&file, &line)) {}
	103	}
	104
	105	#define ERR(cond, fmt, ...) \
	106	do { \
	107	bool __cond = (cond); \
	108	display_openssl_errors(__LINE__); \
	109	if (__cond) { \
	110	err(1, fmt, ## __VA_ARGS__); \
	111	} \
	112	} while(0)
	113
af1eb291 DW	114	static const char *key_pass;
	115
	116	static int pem_pw_cb(char buf, int len, int w, void v)
	117	{
	118	int pwlen;
	119
	120	if (!key_pass)
	121	return -1;
	122
	123	pwlen = strlen(key_pass);
	124	if (pwlen >= len)
	125	return -1;
	126
	127	strcpy(buf, key_pass);
	128
	129	/* If it's wrong, don't keep trying it. */
	130	key_pass = NULL;
	131
	132	return pwlen;
	133	}
	134
e5a2e3c8 JH	135	static EVP_PKEY read_private_key(const char private_key_name)
	136	{
	137	EVP_PKEY *private_key;
	138
	139	if (!strncmp(private_key_name, "pkcs11:", 7)) {
	140	ENGINE *e;
	141
	142	ENGINE_load_builtin_engines();
	143	drain_openssl_errors();
	144	e = ENGINE_by_id("pkcs11");
	145	ERR(!e, "Load PKCS#11 ENGINE");
	146	if (ENGINE_init(e))
	147	drain_openssl_errors();
	148	else
	149	ERR(1, "ENGINE_init");
	150	if (key_pass)
	151	ERR(!ENGINE_ctrl_cmd_string(e, "PIN", key_pass, 0),
	152	"Set PKCS#11 PIN");
	153	private_key = ENGINE_load_private_key(e, private_key_name,
	154	NULL, NULL);
	155	ERR(!private_key, "%s", private_key_name);
	156	} else {
	157	BIO *b;
	158
	159	b = BIO_new_file(private_key_name, "rb");
	160	ERR(!b, "%s", private_key_name);
	161	private_key = PEM_read_bio_PrivateKey(b, NULL, pem_pw_cb,
	162	NULL);
	163	ERR(!private_key, "%s", private_key_name);
	164	BIO_free(b);
	165	}
	166
	167	return private_key;
	168	}
	169
	170	static X509 read_x509(const char x509_name)
	171	{
9552c7ae	172	unsigned char buf[2];
e5a2e3c8 JH	173	X509 *x509;
e5a2e3c8 JH	174	BIO *b;
9552c7ae	175	int n;
e5a2e3c8 JH	176
	177	b = BIO_new_file(x509_name, "rb");
	178	ERR(!b, "%s", x509_name);
9552c7ae DH	179
	180	/* Look at the first two bytes of the file to determine the encoding */
	181	n = BIO_read(b, buf, 2);
	182	if (n != 2) {
	183	if (BIO_should_retry(b)) {
	184	fprintf(stderr, "%s: Read wanted retry\n", x509_name);
	185	exit(1);
	186	}
	187	if (n >= 0) {
	188	fprintf(stderr, "%s: Short read\n", x509_name);
	189	exit(1);
	190	}
	191	ERR(1, "%s", x509_name);
e5a2e3c8	192	}
9552c7ae DH	193
	194	ERR(BIO_reset(b) != 0, "%s", x509_name);
	195
	196	if (buf[0] == 0x30 && buf[1] >= 0x81 && buf[1] <= 0x84)
	197	/* Assume raw DER encoded X.509 */
	198	x509 = d2i_X509_bio(b, NULL);
	199	else
	200	/* Assume PEM encoded X.509 */
	201	x509 = PEM_read_bio_X509(b, NULL, NULL, NULL);
	202
e5a2e3c8 JH	203	BIO_free(b);
	204	ERR(!x509, "%s", x509_name);
	205
	206	return x509;
	207	}
	208
bc1c373d DH	209	int main(int argc, char **argv)
	210	{
	211	struct module_signature sig_info = { .id_type = PKEY_ID_PKCS7 };
	212	char *hash_algo = NULL;
e5a2e3c8 JH	213	char private_key_name = NULL, raw_sig_name = NULL;
e5a2e3c8 JH	214	char x509_name, module_name, *dest_name;
283e8ba2	215	bool save_sig = false, replace_orig;
23dfbbab	216	bool sign_only = false;
e5a2e3c8	217	bool raw_sig = false;
bc1c373d	218	unsigned char buf[4096];
283e8ba2 DH	219	unsigned long module_size, sig_size;
283e8ba2 DH	220	unsigned int use_signed_attrs;
bc1c373d DH	221	const EVP_MD *digest_algo;
bc1c373d DH	222	EVP_PKEY *private_key;
283e8ba2	223	#ifndef USE_PKCS7
e5a2e3c8	224	CMS_ContentInfo *cms = NULL;
283e8ba2 DH	225	unsigned int use_keyid = 0;
283e8ba2 DH	226	#else
e5a2e3c8	227	PKCS7 *pkcs7 = NULL;
283e8ba2	228	#endif
bc1c373d	229	X509 *x509;
e5a2e3c8	230	BIO bd, bm;
bc1c373d	231	int opt, n;
af1eb291	232	OpenSSL_add_all_algorithms();
bc1c373d DH	233	ERR_load_crypto_strings();
	234	ERR_clear_error();
	235
af1eb291 DW	236	key_pass = getenv("KBUILD_SIGN_PIN");
af1eb291 DW	237
283e8ba2 DH	238	#ifndef USE_PKCS7
	239	use_signed_attrs = CMS_NOATTR;
	240	#else
	241	use_signed_attrs = PKCS7_NOATTR;
	242	#endif
	243
bc1c373d	244	do {
e5a2e3c8	245	opt = getopt(argc, argv, "sdpk");
bc1c373d	246	switch (opt) {
e5a2e3c8	247	case 's': raw_sig = true; break;
283e8ba2 DH	248	case 'p': save_sig = true; break;
	249	case 'd': sign_only = true; save_sig = true; break;
	250	#ifndef USE_PKCS7
ed8c2076	251	case 'k': use_keyid = CMS_USE_KEYID; break;
283e8ba2	252	#endif
bc1c373d DH	253	case -1: break;
	254	default: format();
	255	}
	256	} while (opt != -1);
	257
	258	argc -= optind;
	259	argv += optind;
	260	if (argc < 4 \|\| argc > 5)
	261	format();
	262
e5a2e3c8 JH	263	if (raw_sig) {
	264	raw_sig_name = argv[0];
	265	hash_algo = argv[1];
	266	} else {
	267	hash_algo = argv[0];
	268	private_key_name = argv[1];
	269	}
bc1c373d DH	270	x509_name = argv[2];
bc1c373d DH	271	module_name = argv[3];
efcae7c9	272	if (argc == 5 && strcmp(argv[3], argv[4]) != 0) {
bc1c373d DH	273	dest_name = argv[4];
	274	replace_orig = false;
	275	} else {
	276	ERR(asprintf(&dest_name, "%s.~signed~", module_name) < 0,
	277	"asprintf");
	278	replace_orig = true;
	279	}
	280
283e8ba2 DH	281	#ifdef USE_PKCS7
	282	if (strcmp(hash_algo, "sha1") != 0) {
	283	fprintf(stderr, "sign-file: %s only supports SHA1 signing\n",
	284	OPENSSL_VERSION_TEXT);
	285	exit(3);
	286	}
	287	#endif
	288
e5a2e3c8	289	/* Open the module file */
bc1c373d DH	290	bm = BIO_new_file(module_name, "rb");
	291	ERR(!bm, "%s", module_name);
	292
e5a2e3c8 JH	293	if (!raw_sig) {
	294	/* Read the private key and the X.509 cert the PKCS#7 message
	295	* will point to.
	296	*/
	297	private_key = read_private_key(private_key_name);
	298	x509 = read_x509(x509_name);
	299
	300	/* Digest the module data. */
	301	OpenSSL_add_all_digests();
	302	display_openssl_errors(__LINE__);
	303	digest_algo = EVP_get_digestbyname(hash_algo);
	304	ERR(!digest_algo, "EVP_get_digestbyname");
	305
283e8ba2	306	#ifndef USE_PKCS7
e5a2e3c8 JH	307	/* Load the signature message from the digest buffer. */
	308	cms = CMS_sign(NULL, NULL, NULL, NULL,
	309	CMS_NOCERTS \| CMS_PARTIAL \| CMS_BINARY \|
	310	CMS_DETACHED \| CMS_STREAM);
	311	ERR(!cms, "CMS_sign");
	312
	313	ERR(!CMS_add1_signer(cms, x509, private_key, digest_algo,
	314	CMS_NOCERTS \| CMS_BINARY \|
	315	CMS_NOSMIMECAP \| use_keyid \|
	316	use_signed_attrs),
	317	"CMS_add1_signer");
	318	ERR(CMS_final(cms, bm, NULL, CMS_NOCERTS \| CMS_BINARY) < 0,
	319	"CMS_final");
bc1c373d	320
283e8ba2	321	#else
e5a2e3c8 JH	322	pkcs7 = PKCS7_sign(x509, private_key, NULL, bm,
	323	PKCS7_NOCERTS \| PKCS7_BINARY \|
	324	PKCS7_DETACHED \| use_signed_attrs);
	325	ERR(!pkcs7, "PKCS7_sign");
283e8ba2	326	#endif
bc1c373d	327
e5a2e3c8 JH	328	if (save_sig) {
	329	char *sig_file_name;
	330	BIO *b;
283e8ba2	331
e5a2e3c8 JH	332	ERR(asprintf(&sig_file_name, "%s.p7s", module_name) < 0,
	333	"asprintf");
	334	b = BIO_new_file(sig_file_name, "wb");
	335	ERR(!b, "%s", sig_file_name);
283e8ba2	336	#ifndef USE_PKCS7
e5a2e3c8 JH	337	ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) < 0,
e5a2e3c8 JH	338	"%s", sig_file_name);
283e8ba2	339	#else
e5a2e3c8 JH	340	ERR(i2d_PKCS7_bio(b, pkcs7) < 0,
e5a2e3c8 JH	341	"%s", sig_file_name);
283e8ba2	342	#endif
e5a2e3c8 JH	343	BIO_free(b);
	344	}
	345
	346	if (sign_only) {
	347	BIO_free(bm);
	348	return 0;
	349	}
bc1c373d DH	350	}
bc1c373d DH	351
e5a2e3c8 JH	352	/* Open the destination file now so that we can shovel the module data
	353	* across as we read it.
	354	*/
	355	bd = BIO_new_file(dest_name, "wb");
	356	ERR(!bd, "%s", dest_name);
23dfbbab	357
bc1c373d DH	358	/* Append the marker and the PKCS#7 message to the destination file */
	359	ERR(BIO_reset(bm) < 0, "%s", module_name);
	360	while ((n = BIO_read(bm, buf, sizeof(buf))),
	361	n > 0) {
	362	ERR(BIO_write(bd, buf, n) < 0, "%s", dest_name);
	363	}
e5a2e3c8	364	BIO_free(bm);
bc1c373d DH	365	ERR(n < 0, "%s", module_name);
	366	module_size = BIO_number_written(bd);
	367
e5a2e3c8	368	if (!raw_sig) {
283e8ba2	369	#ifndef USE_PKCS7
e5a2e3c8	370	ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) < 0, "%s", dest_name);
283e8ba2	371	#else
e5a2e3c8	372	ERR(i2d_PKCS7_bio(bd, pkcs7) < 0, "%s", dest_name);
283e8ba2	373	#endif
e5a2e3c8 JH	374	} else {
	375	BIO *b;
	376
	377	/* Read the raw signature file and write the data to the
	378	* destination file
	379	*/
	380	b = BIO_new_file(raw_sig_name, "rb");
	381	ERR(!b, "%s", raw_sig_name);
	382	while ((n = BIO_read(b, buf, sizeof(buf))), n > 0)
	383	ERR(BIO_write(bd, buf, n) < 0, "%s", dest_name);
	384	BIO_free(b);
	385	}
	386
283e8ba2 DH	387	sig_size = BIO_number_written(bd) - module_size;
283e8ba2 DH	388	sig_info.sig_len = htonl(sig_size);
bc1c373d DH	389	ERR(BIO_write(bd, &sig_info, sizeof(sig_info)) < 0, "%s", dest_name);
	390	ERR(BIO_write(bd, magic_number, sizeof(magic_number) - 1) < 0, "%s", dest_name);
	391
	392	ERR(BIO_free(bd) < 0, "%s", dest_name);
	393
	394	/* Finally, if we're signing in place, replace the original. */
	395	if (replace_orig)
	396	ERR(rename(dest_name, module_name) < 0, "%s", dest_name);
	397
	398	return 0;
	399	}