Add a script to create a dummy anchor (#110)

# Motivation

Going through the steps of creating an anchor and confirming the backup
device and seed phrase gets tedious and slows down e2e tests.

# Changes

1. `bin/dfx-ii-create-dummy-anchor` script which adds a dummy identity
anchor.
2. Call the script at the end of `bin/dfx-snsdemo`.
3. `bin/dfx-nns-import` which makes necessary change to dfx.json to be
able to call internet_identity and exports
declarations/internet_identity.did
4. Call `bin/dfx-nns-import` from `bin/dfx-snsdemo` right after it calls
`dfx nns import`.

# Testing

Ran the script manually and confirmed that I could sign in by using
existing anchor 10000.

---------

Co-authored-by: Formatting Committer <[email protected]>
Co-authored-by: Max <[email protected]>
Co-authored-by: Max Murphy-Skvorzov <[email protected]>

bin/dfx-ii-create-dummy-anchor

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+SOURCE_DIR="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"
+
+print_help() {
+  cat <<-EOF
+
+	Creates a dummy internet identity with a registered backup device and seed 
+  phrase. This makes it easy to sign in with the fewer number of clicks.
+	EOF
+}
+
+# Source the clap.bash file ---------------------------------------------------
+source "$SOURCE_DIR/clap.bash"
+# Define options
+clap.define short=n long=network desc="The dfx network to use" variable=DFX_NETWORK default="local"
+clap.define short=i long=identity desc="The dfx identity to use" variable=DFX_IDENTITY default="$(dfx identity whoami)"
+# Source the output file ----------------------------------------------------------
+source "$(clap.build)"
+
+IDENTITY_PUB_KEY_FILE="$(mktemp)"
+
+clean_up() {
+  rm "$IDENTITY_PUB_KEY_FILE"
+}
+
+trap clean_up EXIT
+
+DECLARATIONS_DIR="$(realpath "$SOURCE_DIR/../declarations")"
+II_DID_FILE="$DECLARATIONS_DIR/internet_identity.did"
+
+dfx identity export "$DFX_IDENTITY" | openssl ec -out "$IDENTITY_PUB_KEY_FILE" -pubout -outform der 2>/dev/null
+
+echo "Fetching captcha."
+CHALLENGE_KEY="$(dfx canister call internet_identity create_challenge --candid "$II_DID_FILE" --network "$DFX_NETWORK" | idl2json | jq -r .challenge_key)"
+
+PUB_KEY_BLOB=$(hexdump -ve '1/1 "%.2x"' "$IDENTITY_PUB_KEY_FILE" | sed 's/../\\&/g')
+
+echo "Creating anchor."
+ANCHOR="$(dfx canister call internet_identity register "(record{pubkey=blob \"${PUB_KEY_BLOB}\";alias=\"dfx test key\";purpose=variant{authentication};key_type=variant{unknown};protection=variant{unprotected};},record{key=\"${CHALLENGE_KEY}\";chars=\"a\"})" --candid "$II_DID_FILE" --network "$DFX_NETWORK" | idl2json | jq -r .registered.user_number)"
+
+# This matches the dummy key pair generated by Internet Identity here:
+# https://github.com/dfinity/internet-identity/blob/1ce860dd0601312f6521d433c4e273215a1abc5d/src/frontend/src/utils/iiConnection.ts#L57
+DUMMY_PUB_KEY_BLOB='0*0\05\06\03+ep\03!\00;j\27\bc\ce\b6\a4-b\a3\a8\d0*o\0dse2\15w\1d\e2C\a6:\c0H\a1\8bY\da)'
+
+# This is arbitrary as long as it's different from the public key above.
+# We won't actually use the seed phrase. We just want to skip the warning that
+# we don't have a key phrase.
+SEED_PHRASE_PUB_KEY_BLOB='00000000000000000000000000000000000000000000'
+
+add_device() {
+  DEVICE_PUB_KEY_BLOB="$1"
+  DEVICE_KEY_TYPE="$2"
+  DEVICE_PURPOSE="$3"
+  set dfx canister call internet_identity add "(${ANCHOR}, record { alias = \"\"; protection = variant { unprotected }; pubkey = blob \"${DEVICE_PUB_KEY_BLOB}\"; key_type = variant { ${DEVICE_KEY_TYPE} }; purpose = variant { ${DEVICE_PURPOSE} }; })" --candid "$II_DID_FILE" --network "$DFX_NETWORK"
+  "$@" >/dev/null
+}
+
+echo "Adding backup device for anchor $ANCHOR."
+add_device "$DUMMY_PUB_KEY_BLOB" unknown authentication
+echo "Adding seed phrase for anchor $ANCHOR."
+add_device "$SEED_PHRASE_PUB_KEY_BLOB" seed_phrase recovery