Function verify_signature 

pub fn verify_signature(
    key_id: &[u8; 8],
    signature: &[u8; 64],
    data: &[u8],
) -> VerifyResult

Verify an Ed25519 signature over data.

Arguments

• key_id - 8-byte identifier for the signing key
• signature - 64-byte Ed25519 signature
• data - The data that was signed (code + data sections)

Returns

• VerifyResult::Valid if signature is valid
• VerifyResult::KeyNotFound if no trusted key matches key_id
• VerifyResult::InvalidSignature if verification fails
• VerifyResult::Unsigned if signature is all zeros