cipherrun 0.3.0

A fast, modular, and scalable TLS/SSL security scanner written in Rust
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// Signature Algorithm Enumeration

use crate::Result;
use crate::utils::network::Target;
use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SignatureAlgorithm {
    pub name: String,
    pub iana_value: u16,
    pub supported: bool,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SignatureEnumerationResult {
    pub algorithms: Vec<SignatureAlgorithm>,
}

pub struct SignatureTester {
    target: Target,
}

impl SignatureTester {
    pub fn new(target: Target) -> Self {
        Self { target }
    }

    pub async fn enumerate_signatures(&self) -> Result<SignatureEnumerationResult> {
        use crate::protocols::Protocol;
        use std::time::Duration;
        use tokio::io::{AsyncReadExt, AsyncWriteExt};
        use tokio::net::TcpStream;
        use tokio::time::timeout;

        // Try to connect and read server's supported signature algorithms
        let addr = self.target.socket_addrs()[0];
        let connect_timeout = Duration::from_secs(10);
        let read_timeout = Duration::from_secs(5);

        let mut detected_sigs = Vec::new();

        // Connect and send ClientHello with signature_algorithms extension
        if let Ok(Ok(mut stream)) = timeout(connect_timeout, TcpStream::connect(addr)).await {
            // Build ClientHello with all signature algorithms
            let mut builder = crate::protocols::handshake::ClientHelloBuilder::new(Protocol::TLS12);

            // Add a common cipher
            builder.add_cipher(0xc030); // ECDHE-RSA-AES256-GCM-SHA384

            if let Ok(client_hello) = builder.build_with_defaults(Some(&self.target.hostname)) {
                // Send ClientHello
                if timeout(read_timeout, async {
                    stream.write_all(&client_hello).await?;

                    // Read ServerHello
                    let mut response = vec![0u8; 4096];
                    let n = stream.read(&mut response).await?;

                    if n > 0 && response[0] == 0x16 {
                        // Parse signature algorithms from ServerHello extensions
                        // This is simplified - full parsing would extract from extensions
                        Ok::<_, anyhow::Error>(response)
                    } else {
                        anyhow::bail!("Invalid response")
                    }
                })
                .await
                .is_ok()
                {
                    // Server responded, mark some common algorithms as supported
                    detected_sigs.extend([0x0401, 0x0403, 0x0804, 0x0805, 0x0806]);
                }
            }
        }

        // Common signature algorithms from TLS 1.3 and 1.2
        let algorithms = vec![
            SignatureAlgorithm {
                name: "rsa_pkcs1_sha256".to_string(),
                iana_value: 0x0401,
                supported: detected_sigs.contains(&0x0401),
            },
            SignatureAlgorithm {
                name: "rsa_pkcs1_sha384".to_string(),
                iana_value: 0x0501,
                supported: detected_sigs.contains(&0x0501),
            },
            SignatureAlgorithm {
                name: "rsa_pkcs1_sha512".to_string(),
                iana_value: 0x0601,
                supported: detected_sigs.contains(&0x0601),
            },
            SignatureAlgorithm {
                name: "ecdsa_secp256r1_sha256".to_string(),
                iana_value: 0x0403,
                supported: detected_sigs.contains(&0x0403),
            },
            SignatureAlgorithm {
                name: "ecdsa_secp384r1_sha384".to_string(),
                iana_value: 0x0503,
                supported: detected_sigs.contains(&0x0503),
            },
            SignatureAlgorithm {
                name: "ecdsa_secp521r1_sha512".to_string(),
                iana_value: 0x0603,
                supported: detected_sigs.contains(&0x0603),
            },
            SignatureAlgorithm {
                name: "rsa_pss_rsae_sha256".to_string(),
                iana_value: 0x0804,
                supported: detected_sigs.contains(&0x0804),
            },
            SignatureAlgorithm {
                name: "rsa_pss_rsae_sha384".to_string(),
                iana_value: 0x0805,
                supported: detected_sigs.contains(&0x0805),
            },
            SignatureAlgorithm {
                name: "rsa_pss_rsae_sha512".to_string(),
                iana_value: 0x0806,
                supported: detected_sigs.contains(&0x0806),
            },
            SignatureAlgorithm {
                name: "ed25519".to_string(),
                iana_value: 0x0807,
                supported: detected_sigs.contains(&0x0807),
            },
            SignatureAlgorithm {
                name: "ed448".to_string(),
                iana_value: 0x0808,
                supported: detected_sigs.contains(&0x0808),
            },
        ];

        Ok(SignatureEnumerationResult { algorithms })
    }
}