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

use crate::*;
use alloc::vec::Vec;
use core::convert::TryFrom;

// // XXX this compiles but requires bound TryFrom :/
// impl<'a, 'b, T> TryFrom<&'b Any<'a>> for Vec<T>
// where
//     T: TryFrom<&'b Any<'a>>,
//     for<'e> <T as TryFrom<&'b Any<'a>>>::Error: From<Error>,
//     T: FromBer<'a, <T as TryFrom<&'b Any<'a>>>::Error>,
//     //     T: FromBer<'a, E>,
//     //     E: From<Error>,
// {
//     type Error = <T as TryFrom<&'b Any<'a>>>::Error;

//     fn try_from(any: &'b Any<'a>) -> Result<Vec<T>, Self::Error> {
//         any.tag().assert_eq(Self::TAG)?;
//         any.header.assert_constructed()?;
//         let v = SequenceIterator::<T, BerParser, Self::Error>::new(any.data)
//             .collect::<Result<Vec<T>, Self::Error>>()?;
//         Ok(v)
//     }
// }

// // XXX this compiles but requires bound TryFrom :/
// impl<'a, 'b, T> TryFrom<&'b Any<'a>> for Vec<T>
// where
//     T: TryFrom<&'b Any<'a>>,
//     <T as TryFrom<&'b Any<'a>>>::Error: From<Error>,
//     T: FromBer<'a, <T as TryFrom<&'b Any<'a>>>::Error>,
//     //     T: FromBer<'a, E>,
//     //     E: From<Error>,
// {
//     type Error = <T as TryFrom<&'b Any<'a>>>::Error;

//     fn try_from(any: &'b Any<'a>) -> Result<Vec<T>, Self::Error> {
//         any.tag().assert_eq(Self::TAG)?;
//         any.header.assert_constructed()?;
//         let v = SequenceIterator::<T, BerParser, Self::Error>::new(any.data)
//             .collect::<Result<Vec<T>, Self::Error>>()?;
//         Ok(v)
//     }
// }

impl<'a, T> TryFrom<Any<'a>> for Vec<T>
where
    T: FromBer<'a>,
{
    type Error = Error;

    fn try_from(any: Any<'a>) -> Result<Self> {
        any.tag().assert_eq(Self::TAG)?;
        any.header.assert_constructed()?;
        let items = SetIterator::<T, BerParser>::new(any.data).collect::<Result<Vec<T>>>()?;
        Ok(items)
    }
}

impl<T> CheckDerConstraints for Vec<T>
where
    T: CheckDerConstraints,
{
    fn check_constraints(any: &Any) -> Result<()> {
        any.tag().assert_eq(Self::TAG)?;
        any.header.assert_constructed()?;
        for item in SequenceIterator::<Any, DerParser>::new(any.data) {
            let item = item?;
            <T as CheckDerConstraints>::check_constraints(&item)?;
        }
        Ok(())
    }
}

impl<T> Tagged for Vec<T> {
    const TAG: Tag = Tag::Sequence;
}

// impl<'a, T> FromBer<'a> for Vec<T>
// where
//     T: FromBer<'a>,
// {
//     fn from_ber(bytes: &'a [u8]) -> ParseResult<Self> {
//         let (rem, any) = Any::from_ber(bytes)?;
//         any.header.assert_tag(Self::TAG)?;
//         let v = SequenceIterator::<T, BerParser>::new(any.data).collect::<Result<Vec<T>>>()?;
//         Ok((rem, v))
//     }
// }

/// manual impl of FromDer, so we do not need to require `TryFrom<Any> + CheckDerConstraints`
impl<'a, T, E> FromDer<'a, E> for Vec<T>
where
    T: FromDer<'a, E>,
    E: From<Error>,
{
    fn from_der(bytes: &'a [u8]) -> ParseResult<Self, E> {
        let (rem, any) = Any::from_der(bytes).map_err(Err::convert)?;
        any.header
            .assert_tag(Self::TAG)
            .map_err(|e| nom::Err::Error(e.into()))?;
        let v = SequenceIterator::<T, DerParser, E>::new(any.data)
            .collect::<Result<Vec<T>, E>>()
            .map_err(nom::Err::Error)?;
        Ok((rem, v))
    }
}

#[cfg(feature = "std")]
impl<T> ToDer for Vec<T>
where
    T: ToDer,
{
    fn to_der_len(&self) -> Result<usize> {
        let mut len = 0;
        for t in self.iter() {
            len += t.to_der_len()?;
        }
        let header = Header::new(Class::Universal, true, Self::TAG, Length::Definite(len));
        Ok(header.to_der_len()? + len)
    }

    fn write_der_header(&self, writer: &mut dyn std::io::Write) -> SerializeResult<usize> {
        let mut len = 0;
        for t in self.iter() {
            len += t.to_der_len().map_err(|_| SerializeError::InvalidLength)?;
        }
        let header = Header::new(Class::Universal, true, Self::TAG, Length::Definite(len));
        header.write_der_header(writer).map_err(Into::into)
    }

    fn write_der_content(&self, writer: &mut dyn std::io::Write) -> SerializeResult<usize> {
        let mut sz = 0;
        for t in self.iter() {
            sz += t.write_der(writer)?;
        }
        Ok(sz)
    }
}