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figcraft/crates/format/src/jpeg_fixtures.rs
T
BFlat 0971d096db M8: the progressive JPEG check guards file thumbnails too (#1517) 
The header check from #1491 moves to figcraft_format::jpeg so the format crate and the renderer share it, and decode_thumbnail now refuses a progressive JPEG that samples a component more finely than its first (zune-jpeg 0.5.15 asserts on it; in the browser a panic aborts the page). A crafted file's thumbnail on the home screen and in recent files shows no picture instead of crashing. Regression test through decode_thumbnail and archive_preview.
2026-10-29 17:42:53 +07:00

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// Synthetic JPEGs for the header check in `jpeg.rs`, shared by its tests here and the decoder
// tests in `figcraft-render` (`include!`d by both).
/// An 8 × 8 progressive RGB JPEG with every component sampled 1 × 1, as jpeg-encoder 0.6 writes it
/// at quality 50 (JFIF header, the standard tables, three scans). Its frame header (SOF2) starts at
/// byte 20; the second component's sampling byte is [`SECOND_SAMPLING`], the third's follows 3 on.
const TINY_PROGRESSIVE: &[u8] = &[
0xFF, 0xD8, 0xFF, 0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00, 0x01, 0x02, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0xFF, 0xC2, 0x00, 0x11,
0x08, 0x00, 0x08, 0x00, 0x08, 0x03, 0x00, 0x11, 0x00, 0x01, 0x11, 0x01, 0x02, 0x11, 0x01, 0xFF, 0xDB, 0x00, 0x43, 0x00, 0x10, 0x0B, 0x0C, 0x0E,
0x0C, 0x0A, 0x10, 0x0E, 0x0D, 0x0E, 0x12, 0x11, 0x10, 0x13, 0x18, 0x28, 0x1A, 0x18, 0x16, 0x16, 0x18, 0x31, 0x23, 0x25, 0x1D, 0x28, 0x3A, 0x33,
0x3D, 0x3C, 0x39, 0x33, 0x38, 0x37, 0x40, 0x48, 0x5C, 0x4E, 0x40, 0x44, 0x57, 0x45, 0x37, 0x38, 0x50, 0x6D, 0x51, 0x57, 0x5F, 0x62, 0x67, 0x68,
0x67, 0x3E, 0x4D, 0x71, 0x79, 0x70, 0x64, 0x78, 0x5C, 0x65, 0x67, 0x63, 0xFF, 0xDB, 0x00, 0x43, 0x01, 0x11, 0x12, 0x12, 0x18, 0x15, 0x18, 0x2F,
0x1A, 0x1A, 0x2F, 0x63, 0x42, 0x38, 0x42, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00,
0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21,
0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24,
0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A,
0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6,
0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1,
0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F, 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5, 0x11, 0x00,
0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31,
0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15,
0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4,
0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA,
0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6F, 0xFF, 0xDA, 0x00, 0x08,
0x01, 0x01, 0x11, 0x00, 0x00, 0x00, 0x3F, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x02, 0x11, 0x00, 0x00, 0x00, 0x7F, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x00,
0x00, 0x01, 0x14, 0x00, 0x4D, 0xB0, 0x97, 0x8E, 0x45, 0x01, 0x08, 0x03, 0x70, 0xAF, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x01, 0x11, 0x01, 0x14, 0x00,
0xAD, 0x17, 0xA5, 0x4A, 0x6C, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x02, 0x11, 0x01, 0x14, 0x00, 0x8A, 0x75, 0xA1, 0xCB, 0x6D, 0x62, 0x7F, 0xFF, 0xDA,
0x00, 0x08, 0x01, 0x00, 0x00, 0x15, 0x29, 0x00, 0xE0, 0x75, 0x1C, 0x8C, 0x74, 0xAF, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x01, 0x11, 0x15, 0x29, 0x00,
0x3F, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x02, 0x11, 0x15, 0x29, 0x00, 0x3F, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x00, 0x00, 0x2A, 0x3F, 0x00, 0xC8, 0x3C,
0x7E, 0x1F, 0x79, 0x07, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x01, 0x11, 0x2A, 0x3F, 0x00, 0xFE, 0x96, 0x8E, 0x3F, 0xFF, 0xDA, 0x00, 0x08, 0x01, 0x02,
0x11, 0x2A, 0x3F, 0x00, 0xF9, 0x36, 0xFF, 0x00, 0x99, 0xFB, 0xDF, 0xFF, 0xD9,
];
const SECOND_SAMPLING: usize = 34;
/// An 8 × 8 baseline CMYK JPEG as jpeg-encoder 0.6 writes it at quality 50 with 2 × 2 sampling:
/// its black is sampled 2 × 2 against 1 × 1 for the others (SOF0 at byte 36), a well-formed file
/// of the shape the check is about, in a baseline frame.
const TINY_BASELINE_CMYK: &[u8] = &[
0xFF, 0xD8, 0xFF, 0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00, 0x01, 0x02, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0xFF, 0xEE, 0x00, 0x0E,
0x41, 0x64, 0x6F, 0x62, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xC0, 0x00, 0x14, 0x08, 0x00, 0x08, 0x00, 0x08, 0x04, 0x00, 0x11,
0x01, 0x01, 0x11, 0x01, 0x02, 0x11, 0x01, 0x03, 0x22, 0x00, 0xFF, 0xDB, 0x00, 0x43, 0x00, 0x10, 0x0B, 0x0C, 0x0E, 0x0C, 0x0A, 0x10, 0x0E, 0x0D,
0x0E, 0x12, 0x11, 0x10, 0x13, 0x18, 0x28, 0x1A, 0x18, 0x16, 0x16, 0x18, 0x31, 0x23, 0x25, 0x1D, 0x28, 0x3A, 0x33, 0x3D, 0x3C, 0x39, 0x33, 0x38,
0x37, 0x40, 0x48, 0x5C, 0x4E, 0x40, 0x44, 0x57, 0x45, 0x37, 0x38, 0x50, 0x6D, 0x51, 0x57, 0x5F, 0x62, 0x67, 0x68, 0x67, 0x3E, 0x4D, 0x71, 0x79,
0x70, 0x64, 0x78, 0x5C, 0x65, 0x67, 0x63, 0xFF, 0xDB, 0x00, 0x43, 0x01, 0x11, 0x12, 0x12, 0x18, 0x15, 0x18, 0x2F, 0x1A, 0x1A, 0x2F, 0x63, 0x42,
0x38, 0x42, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
0x63, 0x63, 0x63, 0x63, 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51,
0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09,
0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5,
0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2,
0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6,
0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F, 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5, 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04,
0x03, 0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07,
0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46,
0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76,
0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3,
0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9,
0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6,
0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xDA, 0x00, 0x0E, 0x04, 0x00, 0x11, 0x01, 0x11, 0x02, 0x11, 0x03, 0x00, 0x00, 0x3F, 0x00, 0xEE, 0xA6, 0xAA, 0x2A,
0xB3, 0x83, 0x95, 0xED, 0x6D, 0x75, 0xBB, 0xF5, 0xB4, 0x97, 0x6D, 0xB6, 0x5A, 0xD9, 0x2B, 0x8D, 0x39, 0x3A, 0xB3, 0x8F, 0x54, 0xFB, 0xCB, 0xAF,
0xFD, 0xBD, 0x7E, 0x9D, 0xDA, 0xEC, 0x96, 0xB7, 0xE2, 0x95, 0x47, 0x2A, 0x8E, 0x0B, 0x46, 0xB7, 0x77, 0x7A, 0xDD, 0xBE, 0xCD, 0x3F, 0xBD, 0xBF,
0x2B, 0x6C, 0x0E, 0xC3, 0x6E, 0xE9, 0xB6, 0xCA, 0xE0, 0x07, 0x1B, 0xC9, 0x21, 0x95, 0x4E, 0x72, 0x54, 0x0C, 0x8E, 0x00, 0x62, 0x00, 0x5C, 0x28,
0x45, 0xEF, 0x51, 0xFF, 0x00, 0x6B, 0xDA, 0xFF, 0x00, 0x76, 0xC7, 0xFF, 0x00, 0x01, 0x27, 0xA1, 0xFF, 0x00, 0xE3, 0xFB, 0xFE, 0xDD, 0x65, 0xFF,
0x00, 0xD1, 0x31, 0xD6, 0x35, 0x7F, 0xFF, 0xD9,
];
fn with_second_sampled(hv: u8) -> Vec<u8> {
let mut b = TINY_PROGRESSIVE.to_vec();
b[SECOND_SAMPLING] = hv;
b
}
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