totp

#!/bin/bash

# Header for the table with right padding
printf "%-30s\t%-30s\t%-15s\t%-15s\t%s\n" "Service" "Username" "TOTP Code" "Next Code" "Remainder"

# Read each TOTP entry from the "totp/all" pass entry, sort by "Service" column, and then process
pass show totp/all | sort -t$'\t' -k1,1 | while IFS= read -r line; do
    # Extract the entry name
    entry_name=$(echo "$line" | grep -oP '(?<=otpauth://totp/)[^?]+')

    # Extract the secret key from the line
    secret_key=$(echo "$line" | grep -oP '(?<=secret=)[^&]+')

    # Split entry name by ":" or "/"
    if [[ "$entry_name" == *":"* ]]; then
        IFS=':' read -r service username <<< "$entry_name"
    elif [[ "$entry_name" == *"/"* ]]; then
        IFS='/' read -r service username <<< "$entry_name"
    else
        service=""
        username="$entry_name"
    fi

    # If service is empty, set it to "-"
    if [ -z "$service" ]; then
        service="-"
    fi

    # Pad service and username to 30 characters
    service=$(printf '%-30s' "$service")
    username=$(printf '%-30s' "$username")

    # Generate HOTP using oathtool for current time and next time
    codes=$(oathtool -s 30s -d 6 -b --totp "$secret_key" -w 1)

    # Extract the current and next codes
    current_code=$(echo "$codes" | head -n 1)
    next_code=$(echo "$codes" | tail -n 1)

    # Calculate the remainder of epoch time divided by 30
    remainder=$(( $(date '+%s') % 30 ))

    # format topts        
    topt1=$(printf '%-15s' "$current_code")
    topt2=$(printf '%-15s' "$next_code")

    # Print the service, username, current TOTP code, and next TOTP code in tabular format
    printf "%s\t%s\t%s\t%s\t%s\n" "$service" "$username" "$topt1" "$topt2" "$remainder secs"

done