iPhone 15 Pro — Unsalted SHA-1 Mask Cracker (Metal GPU Accelerated)

A high-performance iOS application utilizing the Apple A17 Pro 6-core GPU via Metal compute shaders to crack unsalted SHA-1 prefix-mask targets at 1–3 GKeys/s.

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🎯 Target Overview

Target	Hash (SHA-1)	Known Prefix	Status
H1	824dd5552ec2cc0ccab320198fb47b3b032f2d3f	sn200	CRACKED = sn2005 (Built-in Self-Test)
H2	fa4584ca1d5bd18dc467ef31f84a337f32329c40	sadiy	TARGET: 7-char Base62 ([a-zA-Z0-9])

Key Space & Time to Crack

• Candidate space for H2: $62^7 = \mathbf{3,521,614,606,208}$ (~3.52 Trillion keys)
• Laptop CPU (i5 @ ~15 MKeys/s): $\sim 2.7\text{ days}$
• iPhone 15 Pro GPU (A17 Pro @ 1.5–3.0 GKeys/s): $\mathbf{\sim 30\text{–}60\text{ minutes}}$ (or $\sim 2\text{–}4\text{ hours}$ under passive thermal throttling)

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🚀 Architecture & Features

┌──────────────────────────────────────────────────────────┐
│  SwiftUI 17+ Dashboard (HUD)                             │
│   - Live GKeys/s & MKeys/s Speedometer                   │
│   - Real-time Progress Bar (%) & ETA Countdown           │
│   - Device Thermal Monitor (Nominal / Fair / Serious)    │
│   - 1-Tap Copy & Tactile Haptic Feedback on Match        │
└───────────────┬──────────────────────────────────────────┘
                │ Asynchronous Command Queue (Triple-Buffered)
┌───────────────▼──────────────────────────────────────────┐
│  Metal Compute Shader (sha1_mask.metal)                  │
│   - Massively parallel GPU threads (256/group)           │
│   - Suffix reconstruction directly from thread ID (Base62)│
│   - Single-block SHA-1 (< 55 bytes) fully unrolled 80 rnds│
│   - Target hashes cached in constant memory              │
│   - Relaxed atomic flag on match                         │
└──────────────────────────────────────────────────────────┘

• Built-in Self-Test: Automatically validates the Metal shader against known target sn2005 on launch.
• Triple-Buffered GPU Saturation: Keeps all 6 GPU execution units at 100% load without CPU or UI latency gaps.
• Auto Thermal Throttling: Automatically adapts chunk dispatch intervals if iOS enters serious thermal states, protecting device health and battery.
• Awake Lock: Automatically disables display sleep during cracking (UIApplication.shared.isIdleTimerDisabled = true).

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📲 How to Download & Sideload the IPA

You do not need a Mac or a paid Apple Developer account to install this app.

Step 1: Download the IPA from GitHub Actions

1. Go to the GitHub Actions tab.
2. Click on the latest workflow run: Build iOS IPA (A17 Pro SHA-1 Cracker).
3. Scroll down to the Artifacts section and download sha1-cracker-ios.zip.
4. Extract sha1-cracker-ios.ipa.

Step 2: Sideload with 3uTools (Windows)

1. Open 3uTools on your PC and connect your iPhone 15 Pro via USB.
2. Go to Toolbox ➔ IPA Signature.
3. Click Add IPA File and select sha1-cracker-ios.ipa.
4. Select Sign with Apple ID, enter your free Apple ID credentials, and click Start Signing.
5. Once signed, go to iDevice ➔ Apps ➔ Install Local IPA and select the signed IPA.

Step 3: Trust Developer Certificate on iPhone

1. On your iPhone, open Settings ➔ General ➔ VPN & Device Management.
2. Under Developer App, tap your Apple ID and tap Trust.
3. On iOS 17+, also ensure Developer Mode is enabled: Settings ➔ Privacy & Security ➔ Developer Mode ➔ Turn On (device will reboot).

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💡 Pro-Tips for Maximum Speed (Sustained 2–3 GKeys/s)

• Cooling: Place your iPhone 15 Pro on a metal surface, laptop cooling pad, or in front of a small desk fan. Sustained cooling prevents Apple thermal throttling and maintains peak GPU frequency throughout the entire 3.52T keyspace.
• Power: Keep the device plugged into a fast charger (20W+) during cracking.