This is preparation for PE/COFF measurement support. PE/COFF image hash calculation is same in both UEFI Secure Boot image verification and measurement in measured boot. PE/COFF image parsing functions are gathered into efi_image_loader.c, and exposed even if UEFI Secure Boot is not enabled.
This commit also adds the EFI_SIGNATURE_SUPPORT option to decide if efi_signature.c shall be compiled.
Signed-off-by: Masahisa Kojima masahisa.kojima@linaro.org ---
Changes in v4: - revert #ifdef instead of using "if (!IS_ENABLED())" statement, not to rely on the compiler optimization.
Changes in v3: - hide EFI_SIGNATURE_SUPPORT option
Changes in v2: - Remove all #ifdef from efi_image_loader.c and efi_signature.c - Add EFI_SIGNATURE_SUPPORT option - Explicitly include <u-boot/hash-checksum.h> - Gather PE/COFF parsing functions into efi_image_loader.c - Move efi_guid_t efi_guid_image_security_database in efi_var_common.c
lib/efi_loader/Kconfig | 6 +++ lib/efi_loader/Makefile | 2 +- lib/efi_loader/efi_image_loader.c | 64 ++++++++++++++++++++++++++++- lib/efi_loader/efi_signature.c | 67 +------------------------------ lib/efi_loader/efi_var_common.c | 3 ++ 5 files changed, 74 insertions(+), 68 deletions(-)
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig index 0b99d7c774..b76e77180e 100644 --- a/lib/efi_loader/Kconfig +++ b/lib/efi_loader/Kconfig @@ -174,6 +174,7 @@ config EFI_CAPSULE_AUTHENTICATE select PKCS7_MESSAGE_PARSER select PKCS7_VERIFY select IMAGE_SIGN_INFO + select EFI_SIGNATURE_SUPPORT default n help Select this option if you want to enable capsule @@ -336,6 +337,7 @@ config EFI_SECURE_BOOT select X509_CERTIFICATE_PARSER select PKCS7_MESSAGE_PARSER select PKCS7_VERIFY + select EFI_SIGNATURE_SUPPORT default n help Select this option to enable EFI secure boot support. @@ -343,6 +345,10 @@ config EFI_SECURE_BOOT it is signed with a trusted key. To do that, you need to install, at least, PK, KEK and db.
+config EFI_SIGNATURE_SUPPORT + bool + depends on EFI_SECURE_BOOT || EFI_CAPSULE_AUTHENTICATE + config EFI_ESRT bool "Enable the UEFI ESRT generation" depends on EFI_CAPSULE_FIRMWARE_MANAGEMENT diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile index 8bd343e258..fd344cea29 100644 --- a/lib/efi_loader/Makefile +++ b/lib/efi_loader/Makefile @@ -63,7 +63,7 @@ obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += efi_smbios.o obj-$(CONFIG_EFI_RNG_PROTOCOL) += efi_rng.o obj-$(CONFIG_EFI_TCG2_PROTOCOL) += efi_tcg2.o obj-$(CONFIG_EFI_LOAD_FILE2_INITRD) += efi_load_initrd.o -obj-y += efi_signature.o +obj-$(CONFIG_EFI_SIGNATURE_SUPPORT) += efi_signature.o
EFI_VAR_SEED_FILE := $(subst $",,$(CONFIG_EFI_VAR_SEED_FILE)) $(obj)/efi_var_seed.o: $(srctree)/$(EFI_VAR_SEED_FILE) diff --git a/lib/efi_loader/efi_image_loader.c b/lib/efi_loader/efi_image_loader.c index f53ef367ec..fe1ee198e2 100644 --- a/lib/efi_loader/efi_image_loader.c +++ b/lib/efi_loader/efi_image_loader.c @@ -213,7 +213,68 @@ static void efi_set_code_and_data_type( } }
-#ifdef CONFIG_EFI_SECURE_BOOT +/** + * efi_image_region_add() - add an entry of region + * @regs: Pointer to array of regions + * @start: Start address of region (included) + * @end: End address of region (excluded) + * @nocheck: flag against overlapped regions + * + * Take one entry of region [@start, @end[ and insert it into the list. + * + * * If @nocheck is false, the list will be sorted ascending by address. + * Overlapping entries will not be allowed. + * + * * If @nocheck is true, the list will be sorted ascending by sequence + * of adding the entries. Overlapping is allowed. + * + * Return: status code + */ +efi_status_t efi_image_region_add(struct efi_image_regions *regs, + const void *start, const void *end, + int nocheck) +{ + struct image_region *reg; + int i, j; + + if (regs->num >= regs->max) { + EFI_PRINT("%s: no more room for regions\n", __func__); + return EFI_OUT_OF_RESOURCES; + } + + if (end < start) + return EFI_INVALID_PARAMETER; + + for (i = 0; i < regs->num; i++) { + reg = ®s->reg[i]; + if (nocheck) + continue; + + /* new data after registered region */ + if (start >= reg->data + reg->size) + continue; + + /* new data preceding registered region */ + if (end <= reg->data) { + for (j = regs->num - 1; j >= i; j--) + memcpy(®s->reg[j + 1], ®s->reg[j], + sizeof(*reg)); + break; + } + + /* new data overlapping registered region */ + EFI_PRINT("%s: new region already part of another\n", __func__); + return EFI_INVALID_PARAMETER; + } + + reg = ®s->reg[i]; + reg->data = start; + reg->size = end - start; + regs->num++; + + return EFI_SUCCESS; +} + /** * cmp_pe_section() - compare virtual addresses of two PE image sections * @arg1: pointer to pointer to first section header @@ -422,6 +483,7 @@ err: return false; }
+#ifdef CONFIG_EFI_SECURE_BOOT /** * efi_image_unsigned_authenticate() - authenticate unsigned image with * SHA256 hash diff --git a/lib/efi_loader/efi_signature.c b/lib/efi_loader/efi_signature.c index c7ec275414..bdd09881fc 100644 --- a/lib/efi_loader/efi_signature.c +++ b/lib/efi_loader/efi_signature.c @@ -15,18 +15,16 @@ #include <crypto/public_key.h> #include <linux/compat.h> #include <linux/oid_registry.h> +#include <u-boot/hash-checksum.h> #include <u-boot/rsa.h> #include <u-boot/sha256.h>
-const efi_guid_t efi_guid_image_security_database = - EFI_IMAGE_SECURITY_DATABASE_GUID; const efi_guid_t efi_guid_sha256 = EFI_CERT_SHA256_GUID; const efi_guid_t efi_guid_cert_rsa2048 = EFI_CERT_RSA2048_GUID; const efi_guid_t efi_guid_cert_x509 = EFI_CERT_X509_GUID; const efi_guid_t efi_guid_cert_x509_sha256 = EFI_CERT_X509_SHA256_GUID; const efi_guid_t efi_guid_cert_type_pkcs7 = EFI_CERT_TYPE_PKCS7_GUID;
-#if defined(CONFIG_EFI_SECURE_BOOT) || defined(CONFIG_EFI_CAPSULE_AUTHENTICATE) static u8 pkcs7_hdr[] = { /* SEQUENCE */ 0x30, 0x82, 0x05, 0xc7, @@ -539,68 +537,6 @@ out: return !revoked; }
-/** - * efi_image_region_add() - add an entry of region - * @regs: Pointer to array of regions - * @start: Start address of region (included) - * @end: End address of region (excluded) - * @nocheck: flag against overlapped regions - * - * Take one entry of region [@start, @end[ and insert it into the list. - * - * * If @nocheck is false, the list will be sorted ascending by address. - * Overlapping entries will not be allowed. - * - * * If @nocheck is true, the list will be sorted ascending by sequence - * of adding the entries. Overlapping is allowed. - * - * Return: status code - */ -efi_status_t efi_image_region_add(struct efi_image_regions *regs, - const void *start, const void *end, - int nocheck) -{ - struct image_region *reg; - int i, j; - - if (regs->num >= regs->max) { - EFI_PRINT("%s: no more room for regions\n", __func__); - return EFI_OUT_OF_RESOURCES; - } - - if (end < start) - return EFI_INVALID_PARAMETER; - - for (i = 0; i < regs->num; i++) { - reg = ®s->reg[i]; - if (nocheck) - continue; - - /* new data after registered region */ - if (start >= reg->data + reg->size) - continue; - - /* new data preceding registered region */ - if (end <= reg->data) { - for (j = regs->num - 1; j >= i; j--) - memcpy(®s->reg[j + 1], ®s->reg[j], - sizeof(*reg)); - break; - } - - /* new data overlapping registered region */ - EFI_PRINT("%s: new region already part of another\n", __func__); - return EFI_INVALID_PARAMETER; - } - - reg = ®s->reg[i]; - reg->data = start; - reg->size = end - start; - regs->num++; - - return EFI_SUCCESS; -} - /** * efi_sigstore_free - free signature store * @sigstore: Pointer to signature store structure @@ -846,4 +782,3 @@ struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name)
return efi_build_signature_store(db, db_size); } -#endif /* CONFIG_EFI_SECURE_BOOT || CONFIG_EFI_CAPSULE_AUTHENTICATE */ diff --git a/lib/efi_loader/efi_var_common.c b/lib/efi_loader/efi_var_common.c index b11ed91a74..83479dd142 100644 --- a/lib/efi_loader/efi_var_common.c +++ b/lib/efi_loader/efi_var_common.c @@ -24,6 +24,9 @@ struct efi_auth_var_name_type { const enum efi_auth_var_type type; };
+const efi_guid_t efi_guid_image_security_database = + EFI_IMAGE_SECURITY_DATABASE_GUID; + static const struct efi_auth_var_name_type name_type[] = { {u"PK", &efi_global_variable_guid, EFI_AUTH_VAR_PK}, {u"KEK", &efi_global_variable_guid, EFI_AUTH_VAR_KEK},