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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /scripts/sign-file.c | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'scripts/sign-file.c')
| -rw-r--r-- | scripts/sign-file.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/scripts/sign-file.c b/scripts/sign-file.c new file mode 100644 index 000000000..86b010ac1 --- /dev/null +++ b/scripts/sign-file.c @@ -0,0 +1,358 @@ +/* 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/cms.h> +#include <openssl/evp.h> +#include <openssl/pem.h> +#include <openssl/err.h> +#if OPENSSL_VERSION_NUMBER >= 0x30000000L +# define USE_PKCS11_PROVIDER +# include <openssl/provider.h> +# include <openssl/store.h> +#else +# if !defined(OPENSSL_NO_ENGINE) && !defined(OPENSSL_NO_DEPRECATED_3_0) +# define USE_PKCS11_ENGINE +# include <openssl/engine.h> +# endif +#endif +#include "ssl-common.h" + +#include <linux/module_signature.h> + +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 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_pkcs11(const char *private_key_name) +{ + EVP_PKEY *private_key = NULL; +#ifdef USE_PKCS11_PROVIDER + OSSL_STORE_CTX *store; + + if (!OSSL_PROVIDER_try_load(NULL, "pkcs11", true)) + ERR(1, "OSSL_PROVIDER_try_load(pkcs11)"); + if (!OSSL_PROVIDER_try_load(NULL, "default", true)) + ERR(1, "OSSL_PROVIDER_try_load(default)"); + + store = OSSL_STORE_open(private_key_name, NULL, NULL, NULL, NULL); + ERR(!store, "OSSL_STORE_open"); + + while (!OSSL_STORE_eof(store)) { + OSSL_STORE_INFO *info = OSSL_STORE_load(store); + + if (!info) { + drain_openssl_errors(__LINE__, 0); + continue; + } + if (OSSL_STORE_INFO_get_type(info) == OSSL_STORE_INFO_PKEY) { + private_key = OSSL_STORE_INFO_get1_PKEY(info); + ERR(!private_key, "OSSL_STORE_INFO_get1_PKEY"); + } + OSSL_STORE_INFO_free(info); + if (private_key) + break; + } + OSSL_STORE_close(store); +#elif defined(USE_PKCS11_ENGINE) + ENGINE *e; + + ENGINE_load_builtin_engines(); + drain_openssl_errors(__LINE__, 1); + e = ENGINE_by_id("pkcs11"); + ERR(!e, "Load PKCS#11 ENGINE"); + if (ENGINE_init(e)) + drain_openssl_errors(__LINE__, 1); + 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 + fprintf(stderr, "no pkcs11 engine/provider available\n"); + exit(1); +#endif + return private_key; +} + +static EVP_PKEY *read_private_key(const char *private_key_name) +{ + if (!strncmp(private_key_name, "pkcs11:", 7)) { + return read_private_key_pkcs11(private_key_name); + } else { + EVP_PKEY *private_key; + 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 = MODULE_SIGNATURE_TYPE_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; + const EVP_MD *digest_algo; + EVP_PKEY *private_key; + CMS_ContentInfo *cms = NULL; + unsigned int use_keyid = 0; + 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"); + + 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; + case 'k': use_keyid = CMS_USE_KEYID; break; + 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; + } + + /* 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(); + drain_openssl_errors(__LINE__, 0); + digest_algo = EVP_get_digestbyname(hash_algo); + ERR(!digest_algo, "EVP_get_digestbyname"); + + unsigned int flags = + CMS_NOCERTS | + CMS_NOATTR | + CMS_PARTIAL | + CMS_BINARY | + CMS_DETACHED | + CMS_STREAM | + CMS_NOSMIMECAP | +#ifdef CMS_NO_SIGNING_TIME + CMS_NO_SIGNING_TIME | +#endif + use_keyid; + +#if OPENSSL_VERSION_NUMBER >= 0x30000000L && OPENSSL_VERSION_NUMBER < 0x40000000L + if (EVP_PKEY_is_a(private_key, "ML-DSA-44") || + EVP_PKEY_is_a(private_key, "ML-DSA-65") || + EVP_PKEY_is_a(private_key, "ML-DSA-87")) { + /* ML-DSA + CMS_NOATTR is not supported in openssl-3.5 + * and before. + */ + flags &= ~CMS_NOATTR; + } +#endif + + /* Load the signature message from the digest buffer. */ + cms = CMS_sign(NULL, NULL, NULL, NULL, flags); + ERR(!cms, "CMS_sign"); + + ERR(!CMS_add1_signer(cms, x509, private_key, digest_algo, flags), + "CMS_add1_signer"); + ERR(CMS_final(cms, bm, NULL, flags) != 1, + "CMS_final"); + + 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); + ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) != 1, + "%s", sig_file_name); + 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) { + ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) != 1, "%s", dest_name); + } 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, MODULE_SIGNATURE_MARKER, sizeof(MODULE_SIGNATURE_MARKER) - 1) < 0, + "%s", dest_name); + + ERR(BIO_free(bd) != 1, "%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; +} |
