pub fn from_string(s: &str) -> Result<Certificate> {
        let mut iter = s.split_whitespace();

        let kt_name = iter
            .next()
            .ok_or_else(|| Error::InvalidFormat)?;

        let key_type = KeyType::from_name(&kt_name)?;
        if !key_type.is_cert {
            return Err(Error::NotCertificate);
        }

        let data = iter
            .next()
            .ok_or_else(|| Error::InvalidFormat)?;

        let comment = iter.next().map(String::from);
        let decoded = base64::decode(&data)?;
        let mut reader = Reader::new(&decoded);

        // Validate key types before reading the rest of the data
        let kt_from_reader = reader.read_string()?;
        if kt_name != kt_from_reader {
            return Err(Error::KeyTypeMismatch);
        }

        let nonce = reader.read_bytes()?;
        let key = PublicKey::from_reader(&kt_name, &mut reader)?;
        let serial = reader.read_u64()?;

        let cert_type = match reader.read_u32()? {
            1 => CertType::User,
            2 => CertType::Host,
            n => return Err(Error::InvalidCertType(n)),
        };

        let key_id = reader.read_string()?;
        let principals = reader.read_bytes().and_then(|v| read_principals(&v))?;
        let valid_after = reader.read_u64()?;
        let valid_before = reader.read_u64()?;
        let critical_options = reader.read_bytes().and_then(|v| read_options(&v))?;
        let extensions = reader.read_bytes().and_then(|v| read_options(&v))?;
        let reserved = reader.read_bytes()?;
        let signature_key = reader
            .read_bytes()
            .and_then(|v| PublicKey::from_bytes(&v))?;

        let signed_len = reader.get_offset();
        let signature = reader.read_bytes()?;

        reader.set_offset(0)?;
        let signed_bytes = reader.read_raw_bytes(signed_len)?;

        // Verify the certificate is properly signed
        verify_signature(&signature, &signed_bytes, &signature_key)?;

        Ok(Certificate {
            key_type,
            nonce,
            key,
            serial,
            cert_type,
            key_id,
            principals,
            valid_after,
            valid_before,
            critical_options,
            extensions,
            reserved,
            signature_key,
            signature,
            comment,
            serialized: decoded,
        })
    }
/// Reads an OpenSSH certificate from a given string.
///
/// # Example
///
/// ```rust
/// use sshcerts::Certificate;
///
/// let cert = Certificate::from_string(concat!(
///     "ssh-ed25519-cert-v01@openssh.com AAAAIHNzaC1lZDI1NTE5LWNlcnQtdjAxQG9wZW5zc2guY29tAAAAIGZlEWgv+aRvfJZiREMOKR0PVSTEstkuSeOyRgx",
///     "wI1v2AAAAIAwPJZIwmYs+W7WHNPneMUIAkQnBVw1LP0yQdfh7lT/S/v7+/v7+/v4AAAABAAAADG9iZWxpc2tAdGVzdAAAAAsAAAAHb2JlbGlzawAAAAAAAAAA///",
///     "///////8AAAAiAAAADWZvcmNlLWNvbW1hbmQAAAANAAAACS9iaW4vdHJ1ZQAAAIIAAAAVcGVybWl0LVgxMS1mb3J3YXJkaW5nAAAAAAAAABdwZXJtaXQtYWdlbnQ",
///     "tZm9yd2FyZGluZwAAAAAAAAAWcGVybWl0LXBvcnQtZm9yd2FyZGluZwAAAAAAAAAKcGVybWl0LXB0eQAAAAAAAAAOcGVybWl0LXVzZXItcmMAAAAAAAAAAAAAADM",
///     "AAAALc3NoLWVkMjU1MTkAAAAgXRsP8RFzML3wJDAqm2ENwOrRAHez5QqtcEpyBvwvniYAAABTAAAAC3NzaC1lZDI1NTE5AAAAQMo0Akv0eyr269StM2zBd0Alzjx",
///     "XAC6krgBQex2O31at8r550oCIelfgj8YwZIaXG9DmleP525LcseJ16Z8e5Aw= obelisk@exclave.lan"
/// )).unwrap();
/// println!("{:?}", cert);
/// ```
Reads an OpenSSH certificate from a given string.
Reads an OpenSSH certificate from a given string .
pub fn from_string(s: &str) -> Result<Certificate> {
        let mut iter = s.split_whitespace();
        let kt_name = iter
            .next()
            .ok_or_else(|| Error::InvalidFormat)?;
        let key_type = KeyType::from_name(&kt_name)?;
        if !key_type.is_cert {
            return Err(Error::NotCertificate);
        }
        let data = iter
            .next()
            .ok_or_else(|| Error::InvalidFormat)?;
        let comment = iter.next().map(String::from);
        let decoded = base64::decode(&data)?;
        let mut reader = Reader::new(&decoded);
        // Validate key types before reading the rest of the data
        let kt_from_reader = reader.read_string()?;
        if kt_name != kt_from_reader {
            return Err(Error::KeyTypeMismatch);
        }
        let nonce = reader.read_bytes()?;
        let key = PublicKey::from_reader(&kt_name, &mut reader)?;
        let serial = reader.read_u64()?;
        let cert_type = match reader.read_u32()? {
            1 => CertType::User,
            2 => CertType::Host,
            n => return Err(Error::InvalidCertType(n)),
        };
        let key_id = reader.read_string()?;
        let principals = reader.read_bytes().and_then(|v| read_principals(&v))?;
        let valid_after = reader.read_u64()?;
        let valid_before = reader.read_u64()?;
        let critical_options = reader.read_bytes().and_then(|v| read_options(&v))?;
        let extensions = reader.read_bytes().and_then(|v| read_options(&v))?;
        let reserved = reader.read_bytes()?;
        let signature_key = reader
            .read_bytes()
            .and_then(|v| PublicKey::from_bytes(&v))?;
        let signed_len = reader.get_offset();
        let signature = reader.read_bytes()?;
        reader.set_offset(0)?;
        let signed_bytes = reader.read_raw_bytes(signed_len)?;
        // Verify the certificate is properly signed
        verify_signature(&signature, &signed_bytes, &signature_key)?;
        Ok(Certificate {
            key_type,
            nonce,
            key,
            serial,
            cert_type,
            key_id,
            principals,
            valid_after,
            valid_before,
            critical_options,
            extensions,
            reserved,
            signature_key,
            signature,
            comment,
            serialized: decoded,
        })
    }
pub fn from_string ( s : & str ) -> Result < Certificate > { let mut iter = s . split_whitespace ( ) ; let kt_name = iter . next ( ) . ok_or_else ( | | Error :: InvalidFormat ) ? ; let key_type = KeyType :: from_name ( & kt_name ) ? ; if ! key_type . is_cert { return Err ( Error :: NotCertificate ) ; } let data = iter . next ( ) . ok_or_else ( | | Error :: InvalidFormat ) ? ; let comment = iter . next ( ) . map ( String :: from ) ; let decoded = base64 :: decode ( & data ) ? ; let mut reader = Reader :: new ( & decoded ) ; // Validate key types before reading the rest of the data let kt_from_reader = reader . read_string ( ) ? ; if kt_name != kt_from_reader { return Err ( Error :: KeyTypeMismatch ) ; } let nonce = reader . read_bytes ( ) ? ; let key = PublicKey :: from_reader ( & kt_name , & mut reader ) ? ; let serial = reader . read_u64 ( ) ? ; let cert_type = match reader . read_u32 ( ) ? { 1 => CertType :: User , 2 => CertType :: Host , n => return Err ( Error :: InvalidCertType ( n ) ) , } ; let key_id = reader . read_string ( ) ? ; let principals = reader . read_bytes ( ) . and_then ( | v | read_principals ( & v ) ) ? ; let valid_after = reader . read_u64 ( ) ? ; let valid_before = reader . read_u64 ( ) ? ; let critical_options = reader . read_bytes ( ) . and_then ( | v | read_options ( & v ) ) ? ; let extensions = reader . read_bytes ( ) . and_then ( | v | read_options ( & v ) ) ? ; let reserved = reader . read_bytes ( ) ? ; let signature_key = reader . read_bytes ( ) . and_then ( | v | PublicKey :: from_bytes ( & v ) ) ? ; let signed_len = reader . get_offset ( ) ; let signature = reader . read_bytes ( ) ? ; reader . set_offset ( 0 ) ? ; let signed_bytes = reader . read_raw_bytes ( signed_len ) ? ; // Verify the certificate is properly signed verify_signature ( & signature , & signed_bytes , & signature_key ) ? ; Ok ( Certificate { key_type , nonce , key , serial , cert_type , key_id , principals , valid_after , valid_before , critical_options , extensions , reserved , signature_key , signature , comment , serialized : decoded , } ) }
Reads an OpenSSH certificate from a given string.
Reads an OpenSSH certificate from a given string .
s
&str
example
```rust
use sshcerts::Certificate.

let cert = Certificate::from_string(concat!(
"ssh-ed25519-cert-v01@openssh.com AAAAIHNzaC1lZDI1NTE5LWNlcnQtdjAxQG9wZW5zc2guY29tAAAAIGZlEWgv+aRvfJZiREMOKR0PVSTEstkuSeOyRgx",
"wI1v2AAAAIAwPJZIwmYs+W7WHNPneMUIAkQnBVw1LP0yQdfh7lT/S/v7+/v7+/v4AAAABAAAADG9iZWxpc2tAdGVzdAAAAAsAAAAHb2JlbGlzawAAAAAAAAAA///",
"///////8AAAAiAAAADWZvcmNlLWNvbW1hbmQAAAANAAAACS9iaW4vdHJ1ZQAAAIIAAAAVcGVybWl0LVgxMS1mb3J3YXJkaW5nAAAAAAAAABdwZXJtaXQtYWdlbnQ",
"tZm9yd2FyZGluZwAAAAAAAAAWcGVybWl0LXBvcnQtZm9yd2FyZGluZwAAAAAAAAAKcGVybWl0LXB0eQAAAAAAAAAOcGVybWl0LXVzZXItcmMAAAAAAAAAAAAAADM",
"AAAALc3NoLWVkMjU1MTkAAAAgXRsP8RFzML3wJDAqm2ENwOrRAHez5QqtcEpyBvwvniYAAABTAAAAC3NzaC1lZDI1NTE5AAAAQMo0Akv0eyr269StM2zBd0Alzjx",
"XAC6krgBQex2O31at8r550oCIelfgj8YwZIaXG9DmleP525LcseJ16Z8e5Aw= obelisk@exclave.lan"
)).unwrap();
println!("{:?}", cert);
```
` ` ` rust use sshcerts :: Certificate . let cert = Certificate :: from_string ( concat! ( " ssh - ed25519 - cert - v01@openssh . com AAAAIHNzaC1lZDI1NTE5LWNlcnQtdjAxQG9wZW5zc2guY29tAAAAIGZlEWgv + aRvfJZiREMOKR0PVSTEstkuSeOyRgx " " wI1v2AAAAIAwPJZIwmYs + W7WHNPneMUIAkQnBVw1LP0yQdfh7lT / S / v7 + / v7 + / v4AAAABAAAADG9iZWxpc2tAdGVzdAAAAAsAAAAHb2JlbGlzawAAAAAAAAAA /// " " /////// 8AAAAiAAAADWZvcmNlLWNvbW1hbmQAAAANAAAACS9iaW4vdHJ1ZQAAAIIAAAAVcGVybWl0LVgxMS1mb3J3YXJkaW5nAAAAAAAAABdwZXJtaXQtYWdlbnQ " " tZm9yd2FyZGluZwAAAAAAAAAWcGVybWl0LXBvcnQtZm9yd2FyZGluZwAAAAAAAAAKcGVybWl0LXB0eQAAAAAAAAAOcGVybWl0LXVzZXItcmMAAAAAAAAAAAAAADM " " AAAALc3NoLWVkMjU1MTkAAAAgXRsP8RFzML3wJDAqm2ENwOrRAHez5QqtcEpyBvwvniYAAABTAAAAC3NzaC1lZDI1NTE5AAAAQMo0Akv0eyr269StM2zBd0Alzjx " " XAC6krgBQex2O31at8r550oCIelfgj8YwZIaXG9DmleP525LcseJ16Z8e5Aw = obelisk@exclave . lan " )) . unwrap () ; println! ( " { : ? } " cert ) ; ` ` `