[linux-block.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>

/*
 * 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"

/*
 * 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) {				\
			errx(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
6bfb56e9 LT	32	/*
	33	* OpenSSL 3.0 deprecates the OpenSSL's ENGINE API.
	34	*
	35	* Remove this if/when that API is no longer used
	36	*/
	37	#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
	38
283e8ba2 DH	39	/*
	40	* Use CMS if we have openssl-1.0.0 or newer available - otherwise we have to
	41	* assume that it's not available and its header file is missing and that we
	42	* should use PKCS#7 instead. Switching to the older PKCS#7 format restricts
	43	* the options we have on specifying the X.509 certificate we want.
	44	*
	45	* Further, older versions of OpenSSL don't support manually adding signers to
	46	* the PKCS#7 message so have to accept that we get a certificate included in
	47	* the signature message. Nor do such older versions of OpenSSL support
	48	* signing with anything other than SHA1 - so we're stuck with that if such is
	49	* the case.
	50	*/
f8688017 FF	51	#if defined(LIBRESSL_VERSION_NUMBER) \|\| \
	52	OPENSSL_VERSION_NUMBER < 0x10000000L \|\| \
	53	defined(OPENSSL_NO_CMS)
283e8ba2 DH	54	#define USE_PKCS7
	55	#endif
	56	#ifndef USE_PKCS7
	57	#include <openssl/cms.h>
	58	#else
	59	#include <openssl/pkcs7.h>
	60	#endif
	61
bc1c373d DH	62	struct module_signature {
	63	uint8_t algo; /* Public-key crypto algorithm [0] */
	64	uint8_t hash; /* Digest algorithm [0] */
	65	uint8_t id_type; /* Key identifier type [PKEY_ID_PKCS7] */
	66	uint8_t signer_len; /* Length of signer's name [0] */
	67	uint8_t key_id_len; /* Length of key identifier [0] */
	68	uint8_t __pad[3];
	69	uint32_t sig_len; /* Length of signature data */
	70	};
	71
	72	#define PKEY_ID_PKCS7 2
	73
	74	static char magic_number[] = "~Module signature appended~\n";
	75
	76	static __attribute__((noreturn))
	77	void format(void)
	78	{
	79	fprintf(stderr,
	80	"Usage: scripts/sign-file [-dp] <hash algo> <key> <x509> <module> [<dest>]\n");
e5a2e3c8 JH	81	fprintf(stderr,
e5a2e3c8 JH	82	" scripts/sign-file -s <raw sig> <hash algo> <x509> <module> [<dest>]\n");
bc1c373d DH	83	exit(2);
	84	}
	85
	86	static void display_openssl_errors(int l)
	87	{
	88	const char *file;
	89	char buf[120];
	90	int e, line;
	91
	92	if (ERR_peek_error() == 0)
	93	return;
	94	fprintf(stderr, "At main.c:%d:\n", l);
	95
	96	while ((e = ERR_get_error_line(&file, &line))) {
	97	ERR_error_string(e, buf);
	98	fprintf(stderr, "- SSL %s: %s:%d\n", buf, file, line);
	99	}
	100	}
	101
	102	static void drain_openssl_errors(void)
	103	{
	104	const char *file;
	105	int line;
	106
	107	if (ERR_peek_error() == 0)
	108	return;
	109	while (ERR_get_error_line(&file, &line)) {}
	110	}
	111
	112	#define ERR(cond, fmt, ...) \
	113	do { \
	114	bool __cond = (cond); \
	115	display_openssl_errors(__LINE__); \
	116	if (__cond) { \
1a839502	117	errx(1, fmt, ## __VA_ARGS__); \
bc1c373d DH	118	} \
	119	} while(0)
	120
af1eb291 DW	121	static const char *key_pass;
	122
	123	static int pem_pw_cb(char buf, int len, int w, void v)
	124	{
	125	int pwlen;
	126
	127	if (!key_pass)
	128	return -1;
	129
	130	pwlen = strlen(key_pass);
	131	if (pwlen >= len)
	132	return -1;
	133
	134	strcpy(buf, key_pass);
	135
	136	/* If it's wrong, don't keep trying it. */
	137	key_pass = NULL;
	138
	139	return pwlen;
	140	}
	141
e5a2e3c8 JH	142	static EVP_PKEY read_private_key(const char private_key_name)
	143	{
	144	EVP_PKEY *private_key;
	145
	146	if (!strncmp(private_key_name, "pkcs11:", 7)) {
	147	ENGINE *e;
	148
	149	ENGINE_load_builtin_engines();
	150	drain_openssl_errors();
	151	e = ENGINE_by_id("pkcs11");
	152	ERR(!e, "Load PKCS#11 ENGINE");
	153	if (ENGINE_init(e))
	154	drain_openssl_errors();
	155	else
	156	ERR(1, "ENGINE_init");
	157	if (key_pass)
	158	ERR(!ENGINE_ctrl_cmd_string(e, "PIN", key_pass, 0),
	159	"Set PKCS#11 PIN");
	160	private_key = ENGINE_load_private_key(e, private_key_name,
	161	NULL, NULL);
	162	ERR(!private_key, "%s", private_key_name);
	163	} else {
	164	BIO *b;
	165
	166	b = BIO_new_file(private_key_name, "rb");
	167	ERR(!b, "%s", private_key_name);
	168	private_key = PEM_read_bio_PrivateKey(b, NULL, pem_pw_cb,
	169	NULL);
	170	ERR(!private_key, "%s", private_key_name);
	171	BIO_free(b);
	172	}
	173
	174	return private_key;
	175	}
	176
	177	static X509 read_x509(const char x509_name)
	178	{
9552c7ae	179	unsigned char buf[2];
e5a2e3c8 JH	180	X509 *x509;
e5a2e3c8 JH	181	BIO *b;
9552c7ae	182	int n;
e5a2e3c8 JH	183
	184	b = BIO_new_file(x509_name, "rb");
	185	ERR(!b, "%s", x509_name);
9552c7ae DH	186
	187	/* Look at the first two bytes of the file to determine the encoding */
	188	n = BIO_read(b, buf, 2);
	189	if (n != 2) {
	190	if (BIO_should_retry(b)) {
	191	fprintf(stderr, "%s: Read wanted retry\n", x509_name);
	192	exit(1);
	193	}
	194	if (n >= 0) {
	195	fprintf(stderr, "%s: Short read\n", x509_name);
	196	exit(1);
	197	}
	198	ERR(1, "%s", x509_name);
e5a2e3c8	199	}
9552c7ae DH	200
	201	ERR(BIO_reset(b) != 0, "%s", x509_name);
	202
	203	if (buf[0] == 0x30 && buf[1] >= 0x81 && buf[1] <= 0x84)
	204	/* Assume raw DER encoded X.509 */
	205	x509 = d2i_X509_bio(b, NULL);
	206	else
	207	/* Assume PEM encoded X.509 */
	208	x509 = PEM_read_bio_X509(b, NULL, NULL, NULL);
	209
e5a2e3c8 JH	210	BIO_free(b);
	211	ERR(!x509, "%s", x509_name);
	212
	213	return x509;
	214	}
	215
bc1c373d DH	216	int main(int argc, char **argv)
	217	{
	218	struct module_signature sig_info = { .id_type = PKEY_ID_PKCS7 };
	219	char *hash_algo = NULL;
e5a2e3c8 JH	220	char private_key_name = NULL, raw_sig_name = NULL;
e5a2e3c8 JH	221	char x509_name, module_name, *dest_name;
283e8ba2	222	bool save_sig = false, replace_orig;
23dfbbab	223	bool sign_only = false;
e5a2e3c8	224	bool raw_sig = false;
bc1c373d	225	unsigned char buf[4096];
283e8ba2 DH	226	unsigned long module_size, sig_size;
283e8ba2 DH	227	unsigned int use_signed_attrs;
bc1c373d DH	228	const EVP_MD *digest_algo;
bc1c373d DH	229	EVP_PKEY *private_key;
283e8ba2	230	#ifndef USE_PKCS7
e5a2e3c8	231	CMS_ContentInfo *cms = NULL;
283e8ba2 DH	232	unsigned int use_keyid = 0;
283e8ba2 DH	233	#else
e5a2e3c8	234	PKCS7 *pkcs7 = NULL;
283e8ba2	235	#endif
bc1c373d	236	X509 *x509;
e5a2e3c8	237	BIO bd, bm;
bc1c373d	238	int opt, n;
af1eb291	239	OpenSSL_add_all_algorithms();
bc1c373d DH	240	ERR_load_crypto_strings();
	241	ERR_clear_error();
	242
af1eb291 DW	243	key_pass = getenv("KBUILD_SIGN_PIN");
af1eb291 DW	244
283e8ba2 DH	245	#ifndef USE_PKCS7
	246	use_signed_attrs = CMS_NOATTR;
	247	#else
	248	use_signed_attrs = PKCS7_NOATTR;
	249	#endif
	250
bc1c373d	251	do {
e5a2e3c8	252	opt = getopt(argc, argv, "sdpk");
bc1c373d	253	switch (opt) {
e5a2e3c8	254	case 's': raw_sig = true; break;
283e8ba2 DH	255	case 'p': save_sig = true; break;
	256	case 'd': sign_only = true; save_sig = true; break;
	257	#ifndef USE_PKCS7
ed8c2076	258	case 'k': use_keyid = CMS_USE_KEYID; break;
283e8ba2	259	#endif
bc1c373d DH	260	case -1: break;
	261	default: format();
	262	}
	263	} while (opt != -1);
	264
	265	argc -= optind;
	266	argv += optind;
	267	if (argc < 4 \|\| argc > 5)
	268	format();
	269
e5a2e3c8 JH	270	if (raw_sig) {
	271	raw_sig_name = argv[0];
	272	hash_algo = argv[1];
	273	} else {
	274	hash_algo = argv[0];
	275	private_key_name = argv[1];
	276	}
bc1c373d DH	277	x509_name = argv[2];
bc1c373d DH	278	module_name = argv[3];
efcae7c9	279	if (argc == 5 && strcmp(argv[3], argv[4]) != 0) {
bc1c373d DH	280	dest_name = argv[4];
	281	replace_orig = false;
	282	} else {
	283	ERR(asprintf(&dest_name, "%s.~signed~", module_name) < 0,
	284	"asprintf");
	285	replace_orig = true;
	286	}
	287
283e8ba2 DH	288	#ifdef USE_PKCS7
	289	if (strcmp(hash_algo, "sha1") != 0) {
	290	fprintf(stderr, "sign-file: %s only supports SHA1 signing\n",
	291	OPENSSL_VERSION_TEXT);
	292	exit(3);
	293	}
	294	#endif
	295
e5a2e3c8	296	/* Open the module file */
bc1c373d DH	297	bm = BIO_new_file(module_name, "rb");
	298	ERR(!bm, "%s", module_name);
	299
e5a2e3c8 JH	300	if (!raw_sig) {
	301	/* Read the private key and the X.509 cert the PKCS#7 message
	302	* will point to.
	303	*/
	304	private_key = read_private_key(private_key_name);
	305	x509 = read_x509(x509_name);
	306
	307	/* Digest the module data. */
	308	OpenSSL_add_all_digests();
	309	display_openssl_errors(__LINE__);
	310	digest_algo = EVP_get_digestbyname(hash_algo);
	311	ERR(!digest_algo, "EVP_get_digestbyname");
	312
283e8ba2	313	#ifndef USE_PKCS7
e5a2e3c8 JH	314	/* Load the signature message from the digest buffer. */
	315	cms = CMS_sign(NULL, NULL, NULL, NULL,
	316	CMS_NOCERTS \| CMS_PARTIAL \| CMS_BINARY \|
	317	CMS_DETACHED \| CMS_STREAM);
	318	ERR(!cms, "CMS_sign");
	319
	320	ERR(!CMS_add1_signer(cms, x509, private_key, digest_algo,
	321	CMS_NOCERTS \| CMS_BINARY \|
	322	CMS_NOSMIMECAP \| use_keyid \|
	323	use_signed_attrs),
	324	"CMS_add1_signer");
	325	ERR(CMS_final(cms, bm, NULL, CMS_NOCERTS \| CMS_BINARY) < 0,
	326	"CMS_final");
bc1c373d	327
283e8ba2	328	#else
e5a2e3c8 JH	329	pkcs7 = PKCS7_sign(x509, private_key, NULL, bm,
	330	PKCS7_NOCERTS \| PKCS7_BINARY \|
	331	PKCS7_DETACHED \| use_signed_attrs);
	332	ERR(!pkcs7, "PKCS7_sign");
283e8ba2	333	#endif
bc1c373d	334
e5a2e3c8 JH	335	if (save_sig) {
	336	char *sig_file_name;
	337	BIO *b;
283e8ba2	338
e5a2e3c8 JH	339	ERR(asprintf(&sig_file_name, "%s.p7s", module_name) < 0,
	340	"asprintf");
	341	b = BIO_new_file(sig_file_name, "wb");
	342	ERR(!b, "%s", sig_file_name);
283e8ba2	343	#ifndef USE_PKCS7
e5a2e3c8 JH	344	ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) < 0,
e5a2e3c8 JH	345	"%s", sig_file_name);
283e8ba2	346	#else
e5a2e3c8 JH	347	ERR(i2d_PKCS7_bio(b, pkcs7) < 0,
e5a2e3c8 JH	348	"%s", sig_file_name);
283e8ba2	349	#endif
e5a2e3c8 JH	350	BIO_free(b);
	351	}
	352
	353	if (sign_only) {
	354	BIO_free(bm);
	355	return 0;
	356	}
bc1c373d DH	357	}
bc1c373d DH	358
e5a2e3c8 JH	359	/* Open the destination file now so that we can shovel the module data
	360	* across as we read it.
	361	*/
	362	bd = BIO_new_file(dest_name, "wb");
	363	ERR(!bd, "%s", dest_name);
23dfbbab	364
bc1c373d DH	365	/* Append the marker and the PKCS#7 message to the destination file */
	366	ERR(BIO_reset(bm) < 0, "%s", module_name);
	367	while ((n = BIO_read(bm, buf, sizeof(buf))),
	368	n > 0) {
	369	ERR(BIO_write(bd, buf, n) < 0, "%s", dest_name);
	370	}
e5a2e3c8	371	BIO_free(bm);
bc1c373d DH	372	ERR(n < 0, "%s", module_name);
	373	module_size = BIO_number_written(bd);
	374
e5a2e3c8	375	if (!raw_sig) {
283e8ba2	376	#ifndef USE_PKCS7
e5a2e3c8	377	ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) < 0, "%s", dest_name);
283e8ba2	378	#else
e5a2e3c8	379	ERR(i2d_PKCS7_bio(bd, pkcs7) < 0, "%s", dest_name);
283e8ba2	380	#endif
e5a2e3c8 JH	381	} else {
	382	BIO *b;
	383
	384	/* Read the raw signature file and write the data to the
	385	* destination file
	386	*/
	387	b = BIO_new_file(raw_sig_name, "rb");
	388	ERR(!b, "%s", raw_sig_name);
	389	while ((n = BIO_read(b, buf, sizeof(buf))), n > 0)
	390	ERR(BIO_write(bd, buf, n) < 0, "%s", dest_name);
	391	BIO_free(b);
	392	}
	393
283e8ba2 DH	394	sig_size = BIO_number_written(bd) - module_size;
283e8ba2 DH	395	sig_info.sig_len = htonl(sig_size);
bc1c373d DH	396	ERR(BIO_write(bd, &sig_info, sizeof(sig_info)) < 0, "%s", dest_name);
	397	ERR(BIO_write(bd, magic_number, sizeof(magic_number) - 1) < 0, "%s", dest_name);
	398
	399	ERR(BIO_free(bd) < 0, "%s", dest_name);
	400
	401	/* Finally, if we're signing in place, replace the original. */
	402	if (replace_orig)
	403	ERR(rename(dest_name, module_name) < 0, "%s", dest_name);
	404
	405	return 0;
	406	}