dibs for bash

dibs.sh

#!/bin/bash

# debug mode
DEBUG_MODE=0

# read file from command line
if [ -z "$@" ]; then
  echo "Usage: $0 <file>"
  exit 1
fi

# calculate the sha256 of the file
sha256=$(openssl dgst -sha256 "$@" | sed 's/^.* //')

if [ $DEBUG_MODE -eq 1 ]; then
  echo "sha256: $sha256"
fi

# generate 16 bytes of random data, converted to hex
nonce=$(openssl rand -hex 16)

if [ $DEBUG_MODE -eq 1 ]; then
  echo "nonce: $nonce"
fi

# create a new tmp file which is the concatenation of the nonce and the file (in that order)
tmp=$(mktemp)
echo -n $nonce > $tmp
cat "$@" >> $tmp

# calculate the sha256 of the tmp file
proof_sha256=$(openssl dgst -sha256 $tmp | sed 's/^.* //')

if [ $DEBUG_MODE -eq 1 ]; then
  echo "proof_sha256: $proof_sha256"
fi

# open the url in the default browser
open "https://dibs.directory/id/check/$sha256/sha256?nonce=$nonce&proof=$proof_sha256"