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wolfcrypt UEFI Example Applications

Requires gnu-efi. Tested with qemu and OVFM UEFI implementation. It uses a custom implementation for string.h functions (string.c) based on wolfBoot src/string.c. You can customize the build by changing user_settings.h and adding the relevant .o file into the Makefile _OBJS variable.

Compile

Pre-requisites

git make gcc gnu-efi

build

make

Test on qemu

Pre-requisites

dosfstools qemu qemu-system-x86 ovmf

Create efi disk

We need to create a FAT partition to store efi application.

dd if=/dev/zero of=./efi.disk bs=256M count=1
sudo mkfs.vfat ./efi.disk

Move wolfcrypt.efi and startup.nsh into the fat32 partition

mkdir -p /tmp/efi
sudo mount ./efi.disk /tmp/efi -oloop
sudo cp wolfcrypt.efi /tmp/efi
sudo cp startup.nsh /tmp/efi
sudo umount /tmp/efi

Run qemu

qemu-system-x86_64 -bios /path/to/OVMF.fd -display none -serial stdio -net none -m 256M -drive file=./efi.disk,index=0,media=disk,format=raw

/path/to/OVMF.fd may be /usr/share/edk2-ovmf/x64 or /usr/share/qemu

Example output

UEFI Interactive Shell v2.2
EDK II
UEFI v2.70 (EDK II, 0x00010000)
Mapping table
      FS0: Alias(s):F0a:;BLK0:
          PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
     BLK1: Alias(s):
          PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
Press ESC in 1 seconds to skip startup.nsh or any other key to continue.
Shell> fs0:
FS0:\> wolfcrypt.efi
status: 0x0
Image base: 0xE15E000
------------------------------------------------------------------------------
 wolfSSL version ⸵⸶6
------------------------------------------------------------------------------
error    test passed!
MEMORY   test passed!
base64   test passed!
asn      test passed!
RANDOM   test passed!
SHA-256  test passed!
SHA-3    test passed!
SHAKE128 test passed!
SHAKE256 test passed!
Hash     test passed!
HMAC-SHA256 test passed!
HMAC-SHA3   test passed!
AES      test passed!
AES192   test passed!
AES256   test passed!
RSA      test passed!
logging  test passed!
mutex    test passed!
Test complete
ret: 0
FS0:\>