cross-authenticode 1.0.0

Cross-platform implementation of Authenticode signature verification
Documentation 
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use thiserror::Error;

#[derive(Error, Debug, PartialEq)]
pub enum AuthenticodeError {
    #[error("failed to read slice from PE file: {0}")]
    ReadSlice(String),

    #[error("failed to parse PE file: {0}")]
    ParsePe(String),

    #[error("contains no win_certificate")]
    NoWinCertificate,

    #[error("no valid DER certificate: {0}")]
    DerError(String),

    #[error("no certificates found")]
    NoCertificates,

    #[error("invalid signature: {0}")]
    InvalidSignature(String),

    #[error("invalid ASN.1 encoding: {0}")]
    Asn1Error(String),

    #[error("no encapsulated content found")]
    NoEncapsulatedContent,

    #[error("invalid encapsulated content type: {0}")]
    InvalidEncapsulatedContentType(String),

    #[error("invalid encapsulated content")]
    InvalidEncapsulatedContent,

    #[error("invalid content type: {0}")]
    InvalidContentType(String),

    #[error("invalid hash algorithm")]
    InvalidHashAlgorithm,

    #[error("invalid hash algorithm: {0}")]
    InvalidHashAlgorithmWithName(String),
}

impl From<cms::cert::x509::der::Error> for AuthenticodeError {
    fn from(error: cms::cert::x509::der::Error) -> Self {
        Self::DerError(error.to_string())
    }
}

impl From<std::array::TryFromSliceError> for AuthenticodeError {
    fn from(error: std::array::TryFromSliceError) -> Self {
        Self::ReadSlice(error.to_string())
    }
}

impl From<object::Error> for AuthenticodeError {
    fn from(error: object::Error) -> Self {
        Self::ParsePe(error.to_string())
    }
}

pub trait OptionExt<T> {
    fn err_slice(self) -> Result<T, AuthenticodeError>;
    fn err_pe_oor(self) -> Result<T, AuthenticodeError>;
}

impl<T> OptionExt<T> for Option<T> {
    fn err_slice(self) -> Result<T, AuthenticodeError> {
        self.ok_or(AuthenticodeError::ReadSlice(
            "Failed to read slice".to_string(),
        ))
    }
    fn err_pe_oor(self) -> Result<T, AuthenticodeError> {
        self.ok_or(AuthenticodeError::ParsePe(
            "Result out of range".to_string(),
        ))
    }
}