使用 rsa-pss 算法对数据进行签名

Use rsa-pss algorithm to sign data

我想使用 RSA-PSS 算法通过 rust openssl crate 对数据进行签名和验证。但是我运行遇到了一些问题。

这是我的代码:

    use openssl::sign::{Signer, Verifier, RsaPssSaltlen};
    use openssl::rsa::Rsa;
    use openssl::pkey::PKey;
    use openssl::hash::MessageDigest;
    
    // Generate a keypair
    let keypair = Rsa::generate(2048).unwrap();
    let keypair = PKey::from_rsa(keypair).unwrap();

    let data = b"hello, world!";

    // Sign the data
    let mut signer = Signer::new(MessageDigest::sha256(), &keypair).unwrap();
    // set the salt length to the digest length
    let digest_len = RsaPssSaltlen::DIGEST_LENGTH;
    signer.set_rsa_pss_saltlen(digest_len).unwrap(); // panic here

    signer.update(data).unwrap();
    let signature = signer.sign_to_vec().unwrap();

我将加盐长度设置为摘要长度,但代码会抛出这样的错误:

[Error { code: 67694738, library: "rsa routines", function: "pkey_rsa_ctrl", reason: "invalid pss saltlen", file: "crypto/rsa/rsa_pmeth.c", line: 438 }, Error { code: 101224595, library: "digital envelope routines", function: "EVP_PKEY_CTX_ctrl", reason: "command not supported", file: "crypto/evp/pmeth_lib.c", line: 396 }])

所以 pss saltlen 是无效的,我不知道如何正确地做。

我也试过自己设置saltlen:

let digest_len = RsaPssSaltlen::custom(32 as c_int);

抛出

[Error { code: 67694738, library: "rsa routines", function: "pkey_rsa_ctrl", reason: "invalid pss saltlen", file: "crypto/rsa/rsa_pmeth.c", line: 438 }, Error { code: 101224595, library: "digital envelope routines", function: "EVP_PKEY_CTX_ctrl", reason: "command not supported", file: "crypto/evp/pmeth_lib.c", line: 396 }]

还有一个无效的 pss saltlen。

有什么帮助吗?谢谢!

下面是一个使用RSA-PSS算法的例子:link.

基本上,您需要先设置rsa_padding。

let key = include_bytes!("../test/rsa.pem");
        let private_key = Rsa::private_key_from_pem(key).unwrap();
        let pkey = PKey::from_rsa(private_key).unwrap();

        let mut signer = Signer::new(MessageDigest::sha256(), &pkey).unwrap();
        signer.set_rsa_padding(Padding::PKCS1_PSS).unwrap();
        assert_eq!(signer.rsa_padding().unwrap(), Padding::PKCS1_PSS);
        signer
            .set_rsa_pss_saltlen(RsaPssSaltlen::DIGEST_LENGTH)
            .unwrap();
        signer.set_rsa_mgf1_md(MessageDigest::sha256()).unwrap();
        signer.update(&Vec::from_hex(INPUT).unwrap()).unwrap();
        let signature = signer.sign_to_vec().unwrap();

        let mut verifier = Verifier::new(MessageDigest::sha256(), &pkey).unwrap();
        verifier.set_rsa_padding(Padding::PKCS1_PSS).unwrap();
        verifier
            .set_rsa_pss_saltlen(RsaPssSaltlen::DIGEST_LENGTH)
            .unwrap();
        verifier.set_rsa_mgf1_md(MessageDigest::sha256()).unwrap();
        verifier.update(&Vec::from_hex(INPUT).unwrap()).unwrap();
        assert!(verifier.verify(&signature).unwrap());