1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175

use std::error::Error as StdError;
use thiserror::Error;

type DynError = Box<dyn StdError + Send + Sync + 'static>;

macro_rules! define_error {
    ($name:tt, $short:expr, $doc:tt) => {
        #[derive(Debug, Error)]
        #[doc=$doc]
        pub struct $name {
            pub context: Option<String>,
            pub source: Option<DynError>,
        }

        impl $name {
            pub fn from_msg<T: Into<String>>(msg: T) -> Self {
                Self::from(msg.into())
            }

            pub fn from_err<E>(err: E) -> Self
            where E: StdError + Send + Sync + 'static {
                Self {
                    context: None,
                    source: Some(Box::new(err) as DynError)
                }
            }

            pub fn from_msg_err<M, E>(msg: M, err: E) -> Self
            where M: Into<String>, E: StdError + Send + Sync + 'static
             {
                Self {
                    context: Some(msg.into()),
                    source: Some(Box::new(err) as DynError)
                }
            }
        }

        impl From<&str> for $name {
            fn from(context: &str) -> Self {
                Self { context: Some(context.to_owned()), source: None }
            }
        }

        impl From<String> for $name {
            fn from(context: String) -> Self {
                Self { context: Some(context), source: None }
            }
        }

        impl From<Option<String>> for $name {
            fn from(context: Option<String>) -> Self {
                Self { context, source: None }
            }
        }

        impl<M, E> From<(M, E)> for $name
        where M: Into<String>,
        E: StdError + Send + Sync + 'static {
            fn from((context, err): (M, E)) -> Self {
                Self::from_msg_err(context, err)
            }
        }


        impl Into<String> for $name {
            fn into(self) -> String {
                self.to_string()
            }
        }

        impl std::fmt::Display for $name {
            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                write!(f, $short)?;
                match self.context {
                    Some(ref context) =>
                        write!(f, ": {}", context),
                    None => Ok(())
                }
            }
        }
    };
}

define_error!(
    ConversionError,
    "Conversion error",
    "Error type for general data conversion errors"
);

define_error!(
    EncryptionError,
    "Encryption error",
    "Error type for failure of encryption and decryption operations"
);

define_error!(
    UnexpectedError,
    "Unexpected error",
    "Error type for eventualities that shouldn't normally occur"
);

define_error!(
    ValidationError,
    "Validation error",
    "Error type for failures of `Validatable::validate`"
);

#[cfg(feature = "serde")]
impl From<serde_json::error::Error> for ConversionError {
    fn from(err: serde_json::error::Error) -> Self {
        Self::from_msg(err.to_string())
    }
}

impl From<std::str::Utf8Error> for ConversionError {
    fn from(_err: std::str::Utf8Error) -> Self {
        Self::from("UTF-8 decoding error")
    }
}

impl From<std::string::FromUtf8Error> for ConversionError {
    fn from(_err: std::string::FromUtf8Error) -> Self {
        Self::from("UTF-8 decoding error")
    }
}

#[cfg(any(feature = "cl", feature = "cl_native"))]
impl From<ursa::errors::UrsaCryptoError> for ConversionError {
    fn from(err: ursa::errors::UrsaCryptoError) -> Self {
        Self::from(err.to_string())
    }
}

#[cfg(any(feature = "cl", feature = "cl_native"))]
impl From<ursa::errors::UrsaCryptoError> for EncryptionError {
    fn from(err: ursa::errors::UrsaCryptoError) -> Self {
        Self::from(err.to_string())
    }
}

impl From<ValidationError> for ConversionError {
    fn from(err: ValidationError) -> Self {
        Self {
            context: err.context,
            source: err.source,
        }
    }
}

impl From<ConversionError> for ValidationError {
    fn from(err: ConversionError) -> Self {
        Self {
            context: err.context,
            source: err.source,
        }
    }
}

impl From<UnexpectedError> for ConversionError {
    fn from(err: UnexpectedError) -> Self {
        Self {
            context: err.context,
            source: err.source,
        }
    }
}

impl From<UnexpectedError> for EncryptionError {
    fn from(err: UnexpectedError) -> Self {
        Self {
            context: err.context,
            source: err.source,
        }
    }
}