add get-otp script

bin/get-otp

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+../get-otp/get-otp.sh

get-otp/README.md

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+# get-otp
+
+## About
+A simple shell wrapper for go-andotp and oathtool for generating TOTP with andotp backups files.
+
+## Requirements
+- [go-andotp](https://github.com/RijulGulati/go-andotp)
+- [oathtool](https://www.nongnu.org/oath-toolkit/)

get-otp/get-otp.sh

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+#!/bin/sh
+
+accounts_file=$1
+
+# Check if file path was provided
+if [ -z "$accounts_file" ]; then
+    echo "File not provided."
+    exit 1
+fi
+
+printf "Password: "
+stty -echo
+read -r password
+stty echo
+printf "\n"
+
+# Decrypt the andotp generated file
+accounts_json=$(go-andotp -d -i "$accounts_file" -p "$password")
+if [ "$(echo $accounts_json | awk '{print $1;}')" = "error:" ]; then
+    echo "Could not decrypt the file"
+    exit 1;
+fi
+
+# Get Issuers
+issuers=$(echo "$accounts_json" | jq -r '.[] | .issuer')
+issuers_count=$(echo "$accounts_json" | jq -r '. | length')
+
+# Get issuer
+printf "\nWhat issuer do you want?\n" "$issuers"
+
+# Print issuers with index as prefix
+for i in $(seq 1 "$issuers_count"); do
+    issuer=$(echo "$issuers" | awk "NR==$i")
+    echo "$i: $issuer"
+done
+
+printf "\nIssuer index: "
+read -r issuer_i
+
+# Check valid input (needs to be a number and less or equal to issuers_count)
+if ! ([ "$issuer_i" -eq "$issuer_i" ] && [ "$issuer_i" -le "$issuers_count" ] && [ "$issuer_i" -ge "1" ]); then
+    echo "Invalid index!"
+    exit 1;
+fi
+
+issuer_selected=$(echo "$issuers" | awk "NR==$issuer_i")
+
+# Get secret
+secret=$(echo "$accounts_json" | jq -r ".[] | select(.issuer == \"$issuer_selected\") | .secret")
+
+# Get otp-code
+code=$(echo "$secret" | xargs oathtool --totp -b)
+echo "\nOTP CODE: $code"