Function firefoxExtractHashMetaInfOrder

tasks/integrity.js:46–142

(manifest)

}

function firefoxExtractHashMetaInfOrder(manifest) {
    function getDigestAlgos(lines) {
        const digestHeader = lines[3];
        if (digestHeader === 'Digest-Algorithms: MD5 SHA1') {
            return {
                type: 0,
                lineCount: 5,
                digestFormat: {
                    digestHeader,
                    digestLines: [
                        'MD5-Digest: ',
                        'SHA1-Digest: ',
                    ],
                    digestLinesLengths: [36, 41],
                },
            };
        } else if (digestHeader === 'Digest-Algorithms: MD5 SHA1 SHA256') {
            return {
                type: 1,
                lineCount: 6,
                digestFormat: {
                    digestHeader,
                    digestLines: [
                        'MD5-Digest: ',
                        'SHA1-Digest: ',
                        'SHA256-Digest: ',
                    ],
                    digestLinesLengths: [36, 41, 59],
                },
            };
        } else if (digestHeader === 'Digest-Algorithms: SHA1 SHA256') {
            return {
                type: 2,
                lineCount: 5,
                digestFormat: {
                    digestHeader,
                    digestLines: [
                        'SHA1-Digest: ',
                        'SHA256-Digest: ',
                    ],
                    digestLinesLengths: [41, 59],
                },
            };
        }
        throw new Error('Unknown combination of digest algorithms');
    }

    function getFileName(lines, fileIndex, lineCount, digestFormat) {
        const lineIndex = 2 + fileIndex * lineCount;
        assert(lines[lineIndex - 1] === '');
        assert(lines[lineIndex].startsWith('Name: '));
        assert(lines[lineIndex + 1] === digestFormat.digestHeader);
        for (let i = 0; i < digestFormat.digestLines.length; i++) {
            const line = lines[lineIndex + i + 2];
            assert(line.startsWith(digestFormat.digestLines[i]));
            assert(line.length === digestFormat.digestLinesLengths[i]);
        }
        const fileName = lines[lineIndex].substring('Name: '.length);