edky 0.0.1

Convert Ed25519 public keys between various encoding formats.
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

// This is free and unencumbered software released into the public domain.

use clientele::{
    StandardOptions,
    SysexitsError::{self, *},
    crates::clap::{Parser, Subcommand},
};
use core::str::FromStr;
use derive_more::FromStrError;
use edky::{PUBLIC_KEY_FORMATS, PublicKeyBytes, PublicKeyEncoding};

/// Edky converts Ed25519 public keys between various encoding formats.
#[derive(Debug, Parser)]
#[command(name = "Edky", long_about)]
#[command(arg_required_else_help = true)]
struct Options {
    #[clap(flatten)]
    flags: StandardOptions,

    #[command(subcommand)]
    command: Option<Command>,
}

#[derive(Debug, Subcommand)]
enum Command {
    /// List the supported public key encoding formats.
    List {},

    /// Convert Ed25519 public keys between various encoding formats.
    Convert {
        /// The input encoding format.
        #[clap(long, short, default_value = "hex", value_parser = parse_format)]
        from: PublicKeyEncoding,

        /// The output encoding format.
        #[clap(long, short, default_value = "hex", value_parser = parse_format)]
        to: PublicKeyEncoding,

        /// The input strings to convert.
        inputs: Vec<String>,
    },

    /// Parse Ed25519 public keys in various encoding formats.
    Parse {
        /// The input encoding format.
        #[clap(long, short, default_value = "hex", value_parser = parse_format)]
        from: PublicKeyEncoding,

        /// The input strings to parse.
        inputs: Vec<String>,
    },
}

pub fn main() -> Result<(), SysexitsError> {
    // Load environment variables from `.env`:
    clientele::dotenv().ok();

    // Expand wildcards and @argfiles:
    let args = clientele::args_os()?;

    // Parse command-line options:
    let options = Options::parse_from(args);

    // Print the program version, if requested:
    if options.flags.version {
        println!("edky {}", env!("CARGO_PKG_VERSION"));
        return Ok(());
    }

    // Print the program license, if requested:
    if options.flags.license {
        print!("{}", include_str!("../UNLICENSE"));
        return Ok(());
    }

    // Configure debug output:
    if options.flags.debug {}

    match options.command.unwrap() {
        Command::List {} => {
            for format in PUBLIC_KEY_FORMATS {
                println!("{}", format.name());
            }
            Ok(())
        },
        Command::Convert { from, to, inputs } => {
            for input in inputs {
                let key = PublicKeyBytes::decode(from, input)?;
                let Some(encoded) = key.encode(to) else {
                    return Err(EX_CONFIG);
                };
                println!("{}", encoded);
            }
            Ok(())
        },
        Command::Parse { from, inputs } => {
            for input in inputs {
                let _ = PublicKeyBytes::decode(from, input)?;
            }
            println!("OK");
            Ok(())
        },
    }
}

fn parse_format(input: &str) -> Result<PublicKeyEncoding, FromStrError> {
    // TODO: support an "auto" value that detects the format from the input
    for format in PUBLIC_KEY_FORMATS {
        if format.name() == input {
            return Ok(format.encoding());
        }
    }
    PublicKeyEncoding::from_str(input)
}