Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

decode_payload: Skip over signature entries that cause errors #31

Merged
merged 1 commit into from
Nov 2, 2023
Merged

decode_payload: Skip over signature entries that cause errors #31

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion decode_payload
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -142,7 +142,7 @@ while IFS= read -r LINE; do
"data:"*)
SIGDATA=$(echo "${LINE}" | cut -d '"' -f 2- | head -c-2 | sed 's/%/%%/g')
# This is a workaround for the dev-key vs prod-key case: sed '/signatures {/d' | sed '/ version: 2/d'
SIGHEX=$(printf -- "${SIGDATA}" | sed '/signatures {/d' | sed '/ version: 2/d' | openssl rsautl -verify -pubin -inkey "${PUBKEY}" -raw | tail -c 32 | od -An -vtx1 -w1024 | tr -d ' ')
SIGHEX=$(printf -- "${SIGDATA}" | sed '/signatures {/d' | sed '/ version: 2/d' | openssl rsautl -verify -pubin -inkey "${PUBKEY}" -raw | tail -c 32 | od -An -vtx1 -w1024 | tr -d ' ' || true)
# The raw output instead of asn1parse is used to easily extract the sha256 checksum (done by tail -c 32)
# We also calculate the payload hash that the signature was done for, note that it's of course not the whole file but only up to the attached signature itself
PAYLOADHASH=$(head -c "$((20 + MLEN + SIGOFFSET))" "${FILE}" | sha256sum | cut -d ' ' -f 1)
Expand Down