platform: msm_shared: Add kernel authentication support
Add kernel image authentication support for LE targets with
SHA256, with signature size 2048 and exponent 65537.
Change-Id: Ibd0db2b675d4143de24eb208237a57add89e7aff
diff --git a/platform/msm_shared/LEOEMCertificate.h b/platform/msm_shared/LEOEMCertificate.h
new file mode 100644
index 0000000..af72a51
--- /dev/null
+++ b/platform/msm_shared/LEOEMCertificate.h
@@ -0,0 +1,110 @@
+/* Copyright (c) 2017, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef __LE_OEM_CERTIFICATE_H
+#define __LE_OEM_CERTIFICATE_H
+
+/*
+ Instructions to generate private.key and X509 certificate
+
+A) Generate a sha256 self-signed X509 certificate and a 2048 bits RSA private key
+$ openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout qtipri.key -out qti.crt.pem
+
+B) convert private key from PKCS#8 to PKCS#1 format, save it as qti.key.
+$ openssl rsa -in qtipri.key -out qti.key
+
+C) This private key "qti.key" need to be saved under folder "poky/recipes-kernel/linux-quic/kernel/" and
+"poky/recipes-kernel/linux-msm-4.4/kernel/", used to generate bootimage signature.
+
+D) convert certificate from PEM to DER format
+$ openssl x509 -outform der -in qti.crt.pem -out qti.crt.der
+
+E) open qti.crt.der file in a HEX editor, and then put HEX numbers into array
+ LE_OEM_CERTIFICATE[] in LEOEMCertificate.h
+
+*/
+
+const char LE_OEM_CERTIFICATE[] = {
+ 0x30, 0x82, 0x03, 0x5D, 0x30, 0x82, 0x02, 0x45, 0xA0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x09, 0x00,
+ 0xFA, 0xCD, 0x18, 0x11, 0xED, 0xD3, 0x4D, 0xC8, 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86,
+ 0xF7, 0x0D, 0x01, 0x01, 0x0B, 0x05, 0x00, 0x30, 0x45, 0x31, 0x0B, 0x30, 0x09, 0x06, 0x03, 0x55,
+ 0x04, 0x06, 0x13, 0x02, 0x41, 0x55, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0C,
+ 0x0A, 0x53, 0x6F, 0x6D, 0x65, 0x2D, 0x53, 0x74, 0x61, 0x74, 0x65, 0x31, 0x21, 0x30, 0x1F, 0x06,
+ 0x03, 0x55, 0x04, 0x0A, 0x0C, 0x18, 0x49, 0x6E, 0x74, 0x65, 0x72, 0x6E, 0x65, 0x74, 0x20, 0x57,
+ 0x69, 0x64, 0x67, 0x69, 0x74, 0x73, 0x20, 0x50, 0x74, 0x79, 0x20, 0x4C, 0x74, 0x64, 0x30, 0x1E,
+ 0x17, 0x0D, 0x31, 0x37, 0x30, 0x38, 0x30, 0x35, 0x30, 0x36, 0x33, 0x39, 0x32, 0x32, 0x5A, 0x17,
+ 0x0D, 0x31, 0x38, 0x30, 0x38, 0x30, 0x35, 0x30, 0x36, 0x33, 0x39, 0x32, 0x32, 0x5A, 0x30, 0x45,
+ 0x31, 0x0B, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x41, 0x55, 0x31, 0x13, 0x30,
+ 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0C, 0x0A, 0x53, 0x6F, 0x6D, 0x65, 0x2D, 0x53, 0x74, 0x61,
+ 0x74, 0x65, 0x31, 0x21, 0x30, 0x1F, 0x06, 0x03, 0x55, 0x04, 0x0A, 0x0C, 0x18, 0x49, 0x6E, 0x74,
+ 0x65, 0x72, 0x6E, 0x65, 0x74, 0x20, 0x57, 0x69, 0x64, 0x67, 0x69, 0x74, 0x73, 0x20, 0x50, 0x74,
+ 0x79, 0x20, 0x4C, 0x74, 0x64, 0x30, 0x82, 0x01, 0x22, 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48,
+ 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01, 0x0F, 0x00, 0x30, 0x82, 0x01,
+ 0x0A, 0x02, 0x82, 0x01, 0x01, 0x00, 0xA6, 0xC6, 0x48, 0xE4, 0xF6, 0x8B, 0x42, 0x2A, 0xFC, 0xB0,
+ 0x4A, 0x7A, 0x0F, 0x1A, 0x5E, 0x40, 0x78, 0x8B, 0xBD, 0x30, 0xBD, 0xA1, 0xBF, 0xDC, 0xB4, 0x53,
+ 0x48, 0x31, 0x42, 0x11, 0xCD, 0x83, 0x70, 0x48, 0x75, 0x58, 0x00, 0x82, 0x50, 0x43, 0x4B, 0xA9,
+ 0xCF, 0xEE, 0x81, 0x8C, 0xA4, 0x57, 0xA2, 0x55, 0xB2, 0x84, 0x5C, 0xAA, 0xC9, 0x3F, 0xBA, 0xDE,
+ 0x4C, 0x1B, 0x54, 0xDE, 0xF0, 0x06, 0x3E, 0x3F, 0x3B, 0x5F, 0x6D, 0x78, 0xA3, 0xEB, 0x8F, 0x6F,
+ 0xAC, 0xFC, 0x2F, 0x1F, 0xFC, 0x20, 0x58, 0xDB, 0x5D, 0x86, 0x04, 0xE1, 0x45, 0xF2, 0x98, 0x9A,
+ 0x41, 0x00, 0x46, 0x45, 0x6C, 0x05, 0x5C, 0xE7, 0x7C, 0xC0, 0x25, 0x6F, 0x22, 0xE2, 0xDE, 0x76,
+ 0xA1, 0xAC, 0xC8, 0x82, 0xF7, 0x15, 0x5B, 0x0C, 0xFF, 0xC1, 0xB1, 0xA8, 0x17, 0xB4, 0xFC, 0x0B,
+ 0x98, 0x89, 0xBA, 0x2C, 0xFC, 0xAD, 0xDB, 0x03, 0xD8, 0x48, 0xDD, 0x38, 0x1B, 0xC6, 0x6E, 0x1A,
+ 0x6D, 0xD9, 0x8B, 0x19, 0x73, 0x79, 0x33, 0xFC, 0x7C, 0x5F, 0x9B, 0x9C, 0x91, 0x4F, 0xDC, 0x65,
+ 0x1B, 0x1C, 0xBF, 0x66, 0xF3, 0xDA, 0x79, 0x7C, 0x7F, 0x19, 0xE9, 0xAF, 0x75, 0x34, 0xB2, 0xA0,
+ 0x2F, 0xA7, 0xF4, 0x2B, 0x9C, 0x4D, 0xF5, 0xC8, 0x68, 0xC5, 0xCB, 0x89, 0x6E, 0xA0, 0x72, 0x8E,
+ 0x14, 0x22, 0x4F, 0x1A, 0xD8, 0x32, 0x04, 0x93, 0x91, 0x54, 0xD2, 0x54, 0xDA, 0x5E, 0x62, 0xAB,
+ 0xB6, 0x53, 0x56, 0xAA, 0x8E, 0x17, 0x6D, 0xE7, 0x20, 0x28, 0xBE, 0x50, 0x68, 0x04, 0x8D, 0x38,
+ 0xF6, 0x6F, 0x3E, 0x32, 0x6F, 0x61, 0x47, 0xBA, 0xE7, 0x5E, 0xDD, 0x33, 0x5A, 0xD9, 0x97, 0x8E,
+ 0xD3, 0x9D, 0x0A, 0x78, 0x4B, 0x31, 0xFE, 0x74, 0x41, 0xC8, 0x7D, 0x77, 0x1D, 0x8B, 0x63, 0x67,
+ 0x7C, 0x2D, 0xE1, 0xD3, 0xF1, 0x21, 0x02, 0x03, 0x01, 0x00, 0x01, 0xA3, 0x50, 0x30, 0x4E, 0x30,
+ 0x1D, 0x06, 0x03, 0x55, 0x1D, 0x0E, 0x04, 0x16, 0x04, 0x14, 0x8E, 0x52, 0xC7, 0xA0, 0x78, 0xAD,
+ 0xCF, 0xE3, 0x9D, 0xF9, 0xD5, 0x26, 0xE0, 0xDB, 0x80, 0x1A, 0xB8, 0xE2, 0x2D, 0xD1, 0x30, 0x1F,
+ 0x06, 0x03, 0x55, 0x1D, 0x23, 0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0x8E, 0x52, 0xC7, 0xA0, 0x78,
+ 0xAD, 0xCF, 0xE3, 0x9D, 0xF9, 0xD5, 0x26, 0xE0, 0xDB, 0x80, 0x1A, 0xB8, 0xE2, 0x2D, 0xD1, 0x30,
+ 0x0C, 0x06, 0x03, 0x55, 0x1D, 0x13, 0x04, 0x05, 0x30, 0x03, 0x01, 0x01, 0xFF, 0x30, 0x0D, 0x06,
+ 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x0B, 0x05, 0x00, 0x03, 0x82, 0x01, 0x01,
+ 0x00, 0x65, 0x5A, 0x8E, 0x9F, 0xC3, 0x52, 0xC9, 0x52, 0xCE, 0x6B, 0xF0, 0xAA, 0x8D, 0x78, 0xA0,
+ 0x85, 0xB3, 0x0E, 0xEB, 0x8B, 0x17, 0xC2, 0xB4, 0xFA, 0xF4, 0x20, 0x52, 0x98, 0xCC, 0x1D, 0x45,
+ 0x6F, 0x83, 0x9F, 0xCF, 0xA1, 0x4D, 0x91, 0xBA, 0xE2, 0x29, 0xC2, 0xAA, 0x9A, 0x07, 0xE0, 0xC3,
+ 0xCE, 0x39, 0xDB, 0x5F, 0x5F, 0x96, 0xF1, 0x77, 0x8F, 0x73, 0x6D, 0xDD, 0x83, 0x0C, 0x1D, 0x8C,
+ 0xCC, 0xC0, 0xC9, 0x65, 0x64, 0x67, 0x8F, 0x90, 0x3D, 0x53, 0x24, 0xED, 0x49, 0x18, 0x8A, 0x06,
+ 0xDC, 0x96, 0xC1, 0x40, 0x9C, 0x11, 0x41, 0x70, 0x91, 0x7D, 0x7C, 0xFD, 0x63, 0x81, 0x73, 0x9F,
+ 0xD9, 0x50, 0xF2, 0xA5, 0x86, 0x6A, 0x31, 0xA5, 0x43, 0x66, 0x7D, 0xB2, 0x88, 0x4C, 0x96, 0x08,
+ 0x8B, 0x36, 0xA8, 0x21, 0x47, 0x17, 0xD4, 0x1D, 0xDE, 0xD9, 0x58, 0x45, 0x36, 0x1B, 0x2A, 0x82,
+ 0x46, 0x40, 0x6F, 0x16, 0x41, 0xFB, 0xF2, 0x17, 0x49, 0x2A, 0x13, 0x8E, 0xCC, 0xB8, 0x5B, 0xD3,
+ 0xDA, 0xCA, 0xB3, 0x48, 0xFC, 0xC7, 0x5C, 0x3B, 0x2B, 0xAC, 0x56, 0x41, 0x5F, 0x2B, 0x61, 0x15,
+ 0x08, 0x9D, 0xDA, 0x72, 0x13, 0x43, 0x51, 0x00, 0xCE, 0xA1, 0x4C, 0x98, 0xC6, 0xC3, 0xD4, 0xEE,
+ 0xEF, 0x51, 0xAF, 0xFC, 0x03, 0x86, 0x77, 0xB7, 0xB9, 0x14, 0x8A, 0x79, 0xCB, 0xC8, 0xA9, 0x0D,
+ 0x82, 0xE3, 0xED, 0x05, 0x99, 0x10, 0xFD, 0x80, 0x0D, 0x24, 0x72, 0x1F, 0x1C, 0xB0, 0xCA, 0x64,
+ 0x1D, 0x10, 0x5D, 0x3E, 0x48, 0x5B, 0x54, 0x56, 0x4E, 0xEE, 0x5D, 0x02, 0xEC, 0xEE, 0x0B, 0x2E,
+ 0x77, 0x74, 0xB2, 0x8C, 0xD5, 0x7C, 0xF3, 0xA4, 0x0E, 0x1A, 0x48, 0x04, 0x81, 0x32, 0xF1, 0x39,
+ 0x9B, 0x57, 0xC9, 0xBB, 0xFF, 0x15, 0xB6, 0xE5, 0x20, 0x0D, 0x03, 0x60, 0xBD, 0x3F, 0x29, 0x03,
+ 0xEF
+};
+
+#endif
diff --git a/platform/msm_shared/image_verify.c b/platform/msm_shared/image_verify.c
index 6fff3d2..6fedfd8 100644
--- a/platform/msm_shared/image_verify.c
+++ b/platform/msm_shared/image_verify.c
@@ -29,10 +29,17 @@
#include <certificate.h>
#include <crypto_hash.h>
#include <string.h>
+#include <platform.h>
#include <openssl/err.h>
#include "image_verify.h"
#include "scm.h"
+#include <LEOEMCertificate.h>
+
+const char hash_identifier[] = {
+ 0x30, 0x31, 0x30, 0x0D, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
+};
/*
* Returns -1 if decryption failed otherwise size of plain_text in bytes
@@ -66,8 +73,17 @@
*/
int ret = -1;
X509 *x509_certificate = NULL;
- const unsigned char *cert_ptr = (const unsigned char *)certBuffer;
- unsigned int cert_size = sizeof(certBuffer);
+ const unsigned char *cert_ptr = NULL;
+ unsigned int cert_size = 0;
+
+ if (is_vb_le_enabled()) {
+ cert_ptr = (const unsigned char *)LE_OEM_CERTIFICATE;
+ cert_size = sizeof(LE_OEM_CERTIFICATE);
+ } else {
+ cert_ptr = (const unsigned char *)certBuffer;
+ cert_size = sizeof(certBuffer);
+ }
+
EVP_PKEY *pub_key = NULL;
RSA *rsa_key = NULL;
@@ -166,23 +182,43 @@
* we avoid a potential vulnerability due to trailing data placed at the end of digest.
*/
ret = image_decrypt_signature(signature_ptr, plain_text);
- if (ret != hash_size) {
- dprintf(CRITICAL, "ERROR: Image Invalid! signature check failed! ret %d\n", ret);
- goto cleanup;
+ if (is_vb_le_enabled()) {
+ int sha256_pkcs1_hash_identifier_len = sizeof(hash_identifier);
+ if (ret != (hash_size + sha256_pkcs1_hash_identifier_len)) {
+ dprintf(CRITICAL, "ERROR: VB: Image Invalid! signature check failed! ret %d\n", ret);
+ goto cleanup;
+ }
+ /*
+ * Compare the expected hash with the calculated hash.
+ */
+ if (memcmp(plain_text, hash_identifier, sha256_pkcs1_hash_identifier_len) != 0) {
+ dprintf(CRITICAL,
+ "ERROR: VB: Hash identifier is wrong!\n");
+ goto cleanup;
+ }
+ if (memcmp(plain_text + sha256_pkcs1_hash_identifier_len, digest, hash_size) != 0) {
+ dprintf(CRITICAL,
+ "ERROR: VB: Image Invalid! Please use another image!\n");
+ goto cleanup;
+ }
+ } else {
+ if (ret != hash_size) {
+ dprintf(CRITICAL, "ERROR: Image Invalid! signature check failed! ret %d\n", ret);
+ goto cleanup;
+ }
+ /*
+ * Compare the expected hash with the calculated hash.
+ */
+ if (memcmp(plain_text, digest, hash_size) != 0) {
+ dprintf(CRITICAL,
+ "ERROR: Image Invalid! Please use another image!\n");
+ ret = -1;
+ goto cleanup;
+ }
}
- /*
- * Compare the expected hash with the calculated hash.
- */
- if (memcmp(plain_text, digest, hash_size) != 0) {
- dprintf(CRITICAL,
- "ERROR: Image Invalid! Please use another image!\n");
- ret = -1;
- goto cleanup;
- } else {
- /* Authorized image */
- auth = 1;
- }
+ /* Authorized image */
+ auth = 1;
/* Cleanup after complete usage of openssl - cached data and objects */
cleanup: