README.md: added more details on hello-dasharo.efi building and signing

hello-dasharo/README.md - added list of dependencies, artifacts and
detailed instructions on build process

secure-boot/README.md - added image creation instructions and reference
to hello-dasharo/README.md

Signed-off-by: Mateusz Maciejewski <mateusz.maciejewski@3mdeb.com>

hello-dasharo/README.md

@@ -0,0 +1,23 @@
+## Hello, Dasharo Universe! - Secure Boot test program
+An UEFI hello-world program, but with intentionally-added delays: pre- and post;
+output to capture in tests: `UEFI Hello, Dasharo Universe!`
+
+Build prerequisites for Fedora:
+- mingw64-gcc
+- openssl
+- sbsigntools
+
+Installation of mingw64-gcc compiler, or any other required package on Fedora:
+`sudo dnf install mingw64-gcc`
+
+Building `dist/` sub-directory, containing complete set of files for BAD_INFLUE Secure Boot USB stick:
+`make clean && make dist`
+
+List of files created in `dist/` sub-directory:
+- `cert_fake.der` - fake certificate file with bad contents.
+- `cert_good.der` - proper certificate file, can be enrolled with Secure Boot menu.
+- `hello-dasharo.efi` - unsigned program binary, can be executed with Secure Boot disabled.
+- `hello-dasharo-signed-bad.efi` - program binary signed with some other certificate.
+- `hello-dasharo-signed-good.efi` - program binary signed with `cert_good.der`.
+
+For more information on available Makefile targets, please run `make help`.

secure-boot/README.md

@@ -1,9 +1,18 @@
-# Secure Boot
-
-## sb_test_data.img
+## BAD_INFLUE - Secure Boot test image
 
+### sb_test_data.img features:
 * Single FAT32 partition, labeled BAD_INFLUE, on MBR disk image
 * Contains files from `../hello-dasharo/dist` directory
-* Run `create_img.sh` to re-create
 * Can be safely transferred with dd command to USB stick
 
+### How to generate image:
+1. Go to `../hello-dasharo/` directory.
+2. Refer to `README.md` file located there on how to prepare contents od `dist/` sub-directory.
+3. Go back here - `secure-boot/`
+4. Run `create_img.sh`, observe the output, especially list of files transferred to the image.
+5. Script execution should finish with `Image creation and setup completed successfully.`
+
+### How to transfer image to USB stick:
+1. Use `lsblk` command to identify target USB stick device node and any active mount points.
+2. Use `sudo dd of=./sb_test_data.img if=/dev/X bs=1M status=progress` where X is identified target device node.
+3. Use `sync` command to finalize write operations before stick removal.