155     Util(#[from] util::Error),
157     Utf8(#[from] FromUtf8Error),
163     RcGen(#[from] RcgenError),
167     KeyingMaterial(#[from] KeyingMaterialExporterError),
180 pub struct IoError(#[from] pub io::Error);
190     fn from(e: io::Error) -> Self {  in from()  method
196     fn from(e: sec1::Error) -> Self {  in from()  method
212     fn from(e: p256::elliptic_curve::Error) -> Self {  in from()  method
218     fn from(e: block_modes::InvalidKeyIvLength) -> Self {  in from()  method
223     fn from(e: block_modes::BlockModeError) -> Self {  in from()  method
230     fn from(e: MpscSendError<T>) -> Self {  in from()  method