add initialization of tamper detection #256
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abarisani
commented
Jun 13, 2024
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| func init() { | ||
| // disable ARM debug operations | ||
| imx6ul.Debug(false) |
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This is unnecessary on secure booted units and irrelevant on open ones, nonetheless it's good practice to invoke it as an abundance of caution given its null cost.
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This commit adds conditional support (through the
tamperbuild tag) for advanced tamper detection by means of CAAM support.The SNVS security policy is configured for immediate fail on clock, temperature, voltage glitching using the DryICE module (on i.MX6UL).
The CAAM RTIC performs continuous monitoring of the OS text area (e.g. runtime executable instructions), failures will revoke ability to perform key derivation (BEE remains operational).