scorpiox-otp Core

A pure C implementation of TOTP (Time-based One-Time Password) and HOTP (HMAC-based One-Time Password) generation with zero external dependencies. Generates RFC 6238 / RFC 4226 compliant one-time passwords directly from the command line.

🐧 Linux x64 🐧 Linux ARM64 🍎 macOS ARM64 🪟 Windows x64

⚙️ Flags & Options

Flag	Short	Description	Takes Value
--help	-h	Show help message and usage information	No
-a	—	Hash algorithm (sha1, sha256, sha512). Default: sha1	Yes
-j	—	Output in JSON format	No
-s	—	Base32-encoded secret key for OTP generation	Yes

💡 Usage Examples

# Generate a TOTP code with a base32 secret
$ scorpiox-otp -s JBSWY3DPEHPK3PXP
492039

# Use SHA-256 algorithm instead of the default SHA-1
$ scorpiox-otp -s JBSWY3DPEHPK3PXP -a sha256
781204

# Use SHA-512 for higher security TOTP
$ scorpiox-otp -s GEZDGNBVGY3TQOJQ -a sha512
350618

# Output in JSON format for scripting and automation
$ scorpiox-otp -s JBSWY3DPEHPK3PXP -j
{"code":"492039","algorithm":"sha1","period":30,"remaining":17}

# Combine JSON output with SHA-256 for API integration
$ scorpiox-otp -s JBSWY3DPEHPK3PXP -a sha256 -j
{"code":"781204","algorithm":"sha256","period":30,"remaining":12}

# Use in a shell script to auto-fill 2FA
$ OTP=$(scorpiox-otp -s "$MY_SECRET")
$ curl -X POST https://api.example.com/verify -d "token=$OTP"

# Pipe to clipboard (macOS)
$ scorpiox-otp -s JBSWY3DPEHPK3PXP | pbcopy

# Pipe to clipboard (Linux with xclip)
$ scorpiox-otp -s JBSWY3DPEHPK3PXP | xclip -selection clipboard

# Show help and all available options
$ scorpiox-otp --help

scorpiox-otp Core

⚙️ Flags & Options

💡 Usage Examples

📦 Source & Build Info

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