gcrypt 0.7.0

Libgcrypt bindings for Rust
Documentation 
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

use std::{ops, result, slice, str};

use ffi;

use crate::{rand::Level, Error, NonNull, Result};

#[derive(Debug)]
pub struct Buffer {
    buf: NonNull<*mut u8>,
    len: usize,
}

impl Drop for Buffer {
    #[inline]
    fn drop(&mut self) {
        unsafe {
            ffi::gcry_free(self.buf.as_ptr().cast());
        }
    }
}

impl Buffer {
    #[inline]
    pub unsafe fn from_raw(buf: *mut u8, len: usize) -> Buffer {
        Buffer {
            buf: NonNull::<*mut u8>::new(buf).unwrap(),
            len,
        }
    }

    #[inline]
    pub fn new(len: usize) -> Result<Buffer> {
        let _ = crate::init_default();
        unsafe {
            ffi::gcry_malloc(len)
                .as_mut()
                .map(|x| Buffer::from_raw(x as *mut _ as *mut _, len))
                .ok_or_else(Error::last_os_error)
        }
    }

    #[inline]
    pub fn new_secure(len: usize) -> Result<Buffer> {
        let _ = crate::init_default();
        unsafe {
            ffi::gcry_malloc_secure(len)
                .as_mut()
                .map(|x| Buffer::from_raw(x as *mut _ as *mut _, len))
                .ok_or_else(Error::last_os_error)
        }
    }

    #[inline]
    pub fn try_clone(&self) -> Result<Buffer> {
        let mut result = if self.is_secure() {
            Buffer::new_secure(self.len)?
        } else {
            Buffer::new(self.len)?
        };
        result.copy_from_slice(self);
        Ok(result)
    }

    #[inline]
    pub fn random(len: usize, level: Level) -> Result<Buffer> {
        let _ = crate::init_default();
        unsafe {
            ffi::gcry_random_bytes(len, level.raw())
                .as_mut()
                .map(|x| Buffer::from_raw(x as *mut _ as *mut _, len))
                .ok_or_else(Error::last_os_error)
        }
    }

    #[inline]
    pub fn random_secure(len: usize, level: Level) -> Result<Buffer> {
        let _ = crate::init_default();
        unsafe {
            ffi::gcry_random_bytes_secure(len, level.raw())
                .as_mut()
                .map(|x| Buffer::from_raw(x as *mut _ as *mut _, len))
                .ok_or_else(Error::last_os_error)
        }
    }

    #[inline]
    pub fn is_secure(&self) -> bool {
        unsafe { ffi::gcry_is_secure(self.buf.as_ptr().cast()) != 0 }
    }

    #[inline]
    pub fn as_bytes(&self) -> &[u8] {
        unsafe { slice::from_raw_parts(self.buf.as_ptr(), self.len) }
    }

    #[inline]
    pub fn as_bytes_mut(&mut self) -> &mut [u8] {
        unsafe { slice::from_raw_parts_mut(self.buf.as_ptr(), self.len) }
    }

    #[inline]
    pub fn to_str(&self) -> result::Result<&str, str::Utf8Error> {
        str::from_utf8(self.as_bytes())
    }
}

impl ops::Deref for Buffer {
    type Target = [u8];

    #[inline]
    fn deref(&self) -> &[u8] {
        self.as_bytes()
    }
}

impl ops::DerefMut for Buffer {
    #[inline]
    fn deref_mut(&mut self) -> &mut [u8] {
        self.as_bytes_mut()
    }
}

impl AsRef<[u8]> for Buffer {
    #[inline]
    fn as_ref(&self) -> &[u8] {
        self.as_bytes()
    }
}

impl AsMut<[u8]> for Buffer {
    #[inline]
    fn as_mut(&mut self) -> &mut [u8] {
        self.as_bytes_mut()
    }
}