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@arsenin-kitsoft arsenin-kitsoft changed the title feat: add ES512 algorithm support using P-521 elliptic curve WIP: feat: add ES512 algorithm support using P-521 elliptic curve Jan 12, 2026
…ehensive tests

- Refactor P-521 signer/verifier into define_p521_signer! and define_p521_verifier! macros
- Implement safe PKCS8 key extraction using slice-to-array conversion (no unsafe code)
- Custom ASN.1 DER parser for P-521 nested ECPrivateKey structure (66-byte key extraction)
- Add three ES512 integration tests (sign/verify, PEM, claim round-trip)
- Include P-521 test keys in PEM and DER formats for test suite
@arsenin-kitsoft arsenin-kitsoft changed the title WIP: feat: add ES512 algorithm support using P-521 elliptic curve feat: add ES512 algorithm support using P-521 elliptic curve Jan 12, 2026
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