Support SM2/SM3/SM4 in this library for pgp

[TommyLike]

Just cheking, if this will be supported in this pgp libaray

1. SM2: https://www.openssl.org/docs/manmaster/man7/SM2.html
2. SM3: https://www.openssl.org/docs/man1.1.1/man3/EVP_sm3.html
3. SM4: https://www.openssl.org/docs/man3.0/man7/EVP_CIPHER-SM4.html

[sorairolake]

Are they included in the OpenPGP specification? As far as I know, it doesn't seem to be in RFCs¹².

Footnotes

1. https://datatracker.ietf.org/doc/html/rfc4880 ↩

2. https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh ↩

[TommyLike]

Are they included in the OpenPGP specification? As far as I know, it doesn't seem to be in RFCs12.

Footnotes

1. https://datatracker.ietf.org/doc/html/rfc4880 ↩
2. https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh ↩

Correct, it's not in the SPEC, it's been supported in RNP and check here

[sorairolake]

@TommyLike Thanks for information. These Rust implementations are available,¹²³ so this might be easy to solve.

Footnotes

1. https://crates.io/crates/sm2 ↩

2. https://crates.io/crates/sm3 ↩

3. https://crates.io/crates/sm4 ↩

[dignifiedquire]

Given the availability of those crates, I'd be happy to accept a PR that adds support for these behind a feature flag.

[TommyLike]

Looking forward to someone who can help on this. 😄

[hko-s]

There are implementations of all three mechanisms in RustCrypto by now:

https://crates.io/crates/sm2/
https://crates.io/crates/sm3/
https://crates.io/crates/sm4/

However, it seems that the RustCrypto implementation of sm2 is still missing support for the SM2 Key Exchange Protocol and SM2 Public Key Encryption.