micro-ecc Integration

Overview

Use this skill to integrate micro-ecc (kmackay/micro-ecc, header uECC.h) by treating randomness, key storage, curve choice, and test vectors as security-critical. ECC that compiles but never called uECC_set_rng() or uses mismatched key byte formats is not working. The core key generation, signing, verification, and ECDH functions return 1 on success and 0 on failure (uECC_verify returns 1 only for a valid signature); the size-query helpers instead return a byte count, and uECC_compress/uECC_decompress return void.

When To Use

Use this skill when:

• The user wants ECDH (uECC_shared_secret), ECDSA (uECC_sign/uECC_verify), or key generation (uECC_make_key) on an MCU using micro-ecc.
• The issue involves uECC_make_key/uECC_sign returning 0, bad signatures, key mismatch, RNG, curve selection, endian/format mismatch, or slow scalar multiplication.
• The project uses uECC.h, uECC.c, a uECC_Curve, or uECC_set_rng.

Do not use this skill for full TLS stacks. Use mbedtls-integration for TLS. For AES/SHA/HMAC primitives, use tinycrypt-integration.

First Questions

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