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efi_loader: expose efi_image_parse() even if UEFI Secure Boot is disabled

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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>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Masahisa Kojima
2021-05-14 09:53:36 +09:00
committed by Heinrich Schuchardt
parent 6754e24b54
commit f6081a8a1e
5 changed files with 73 additions and 68 deletions
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64
lib/efi_loader/efi_image_loader.c
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@@ -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 = &regs->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(&regs->reg[j + 1], &regs->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 = &regs->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