mismall 2.0.0

Streaming Huffman compression library with AES-256-GCM encryption and archive support
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
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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198

#[cfg(test)]
mod tests {
    use crate::crypto::DEFAULT_CHUNK_SIZE;
    use crate::headers::Headers;
    use crate::huffman::{decoder::decode, encoder::encode};
    use std::io::{Cursor, Seek, SeekFrom};

    #[test]
    fn test_basic_unencrypted_roundtrip() {
        let original_content =
            b"Hello, this is a test string for roundtrip compression and decompression.";
        let mut input_reader = Cursor::new(original_content.to_vec());
        let mut encoded_output_buffer = Cursor::new(Vec::new());

        // 1. Encode
        let encode_info = encode(
            &mut input_reader,
            "test_file.txt",
            None, // No encryption
            &mut encoded_output_buffer,
            DEFAULT_CHUNK_SIZE,
        )
        .expect("Encoding failed");

        // Rewind encoded buffer to read from the beginning
        encoded_output_buffer
            .seek(SeekFrom::Start(0))
            .expect("Failed to rewind encoded buffer");

        // 2. Read header first
        let header =
            Headers::from_reader(&mut encoded_output_buffer).expect("Failed to read header");

        let mut decoded_output_buffer = Cursor::new(Vec::new());

        // 3. Decode
        let decode_info = decode(
            header,
            &mut encoded_output_buffer,
            None, // No decryption
            &mut decoded_output_buffer,
            DEFAULT_CHUNK_SIZE,
        )
        .expect("Decoding failed");

        // Verify that original_size matches
        assert_eq!(encode_info.original_size, original_content.len() as u64);
        assert_eq!(decode_info.original_size, original_content.len() as u64);

        // Verify content
        assert_eq!(
            decoded_output_buffer.into_inner(),
            original_content.to_vec()
        );
    }

    #[test]
    fn test_basic_encrypted_roundtrip() {
        let original_content =
            b"This is some secret data that should be encrypted and then decrypted successfully.";
        let password = "supersecretpassword";
        let mut input_reader = Cursor::new(original_content.to_vec());
        let mut encoded_output_buffer = Cursor::new(Vec::new());

        // 1. Encode with encryption
        let encode_info = encode(
            &mut input_reader,
            "secret_file.txt",
            Some(password), // With encryption
            &mut encoded_output_buffer,
            DEFAULT_CHUNK_SIZE,
        )
        .expect("Encoding failed");

        // Rewind encoded buffer to read from the beginning
        encoded_output_buffer
            .seek(SeekFrom::Start(0))
            .expect("Failed to rewind encoded buffer");

        // 2. Read header first
        let header =
            Headers::from_reader(&mut encoded_output_buffer).expect("Failed to read header");

        let mut decoded_output_buffer = Cursor::new(Vec::new());

        // 3. Decode with decryption
        let decode_info = decode(
            header,
            &mut encoded_output_buffer,
            Some(password), // With decryption
            &mut decoded_output_buffer,
            DEFAULT_CHUNK_SIZE,
        )
        .expect("Decoding failed");

        // Verify that original_size matches
        assert_eq!(encode_info.original_size, original_content.len() as u64);
        assert_eq!(decode_info.original_size, original_content.len() as u64);

        // Verify content
        assert_eq!(
            decoded_output_buffer.into_inner(),
            original_content.to_vec()
        );
    }

    #[test]
    fn test_large_data_roundtrip() {
        let original_content: Vec<u8> = (0..100000).map(|i| (i % 256) as u8).collect(); // 100KB of repeating data
        let password = "anothersecretpassword";
        let mut input_reader = Cursor::new(original_content.to_vec());
        let mut encoded_output_buffer = Cursor::new(Vec::new());

        // 1. Encode with encryption
        let encode_info = encode(
            &mut input_reader,
            "large_file.bin",
            Some(password), // With encryption
            &mut encoded_output_buffer,
            DEFAULT_CHUNK_SIZE,
        )
        .expect("Encoding failed for large data");

        // Rewind encoded buffer to read from the beginning
        encoded_output_buffer
            .seek(SeekFrom::Start(0))
            .expect("Failed to rewind encoded buffer");

        // 2. Read header first
        let header = Headers::from_reader(&mut encoded_output_buffer)
            .expect("Failed to read header for large data");

        let mut decoded_output_buffer = Cursor::new(Vec::new());

        // 3. Decode with decryption
        let decode_info = decode(
            header,
            &mut encoded_output_buffer,
            Some(password), // With decryption
            &mut decoded_output_buffer,
            DEFAULT_CHUNK_SIZE,
        )
        .expect("Decoding failed for large data");

        // Verify that original_size matches
        assert_eq!(encode_info.original_size, original_content.len() as u64);
        assert_eq!(decode_info.original_size, original_content.len() as u64);

        // Verify content
        assert_eq!(decoded_output_buffer.into_inner(), original_content);
    }

    #[test]
    fn test_empty_file_roundtrip() {
        let original_content = b""; // Empty content
        let password = "emptyfilepassword";
        let mut input_reader = Cursor::new(original_content.to_vec());
        let mut encoded_output_buffer = Cursor::new(Vec::new());

        // 1. Encode with encryption
        let encode_info = encode(
            &mut input_reader,
            "empty_file.txt",
            Some(password), // With encryption
            &mut encoded_output_buffer,
            DEFAULT_CHUNK_SIZE,
        )
        .expect("Encoding failed for empty file");

        // Rewind encoded buffer to read from the beginning
        encoded_output_buffer
            .seek(SeekFrom::Start(0))
            .expect("Failed to rewind encoded buffer");

        // 2. Read header first
        let header = Headers::from_reader(&mut encoded_output_buffer)
            .expect("Failed to read header for empty file");

        let mut decoded_output_buffer = Cursor::new(Vec::new());

        // 3. Decode with decryption
        let decode_info = decode(
            header,
            &mut encoded_output_buffer,
            Some(password), // With decryption
            &mut decoded_output_buffer,
            DEFAULT_CHUNK_SIZE,
        )
        .expect("Decoding failed for empty file");

        // Verify that original_size matches
        assert_eq!(encode_info.original_size, original_content.len() as u64);
        assert_eq!(decode_info.original_size, original_content.len() as u64);

        // Verify content
        assert_eq!(decoded_output_buffer.into_inner(), original_content);
    }
}