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Adjust encoding for bigger attachments

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Signed-off-by: Knut Ahlers <knut@ahlers.me>
This commit is contained in:
Knut Ahlers 2023-10-01 15:50:17 +02:00
parent 935a29b7cf
commit 6500f586d2
No known key found for this signature in database
GPG Key ID: D91C3E91E4CAD6F5
1 changed files with 8 additions and 4 deletions
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12
src/crypto.js
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@ -6,7 +6,12 @@ const pbkdf2Params = { hash: 'SHA-512', iterations: 300000, name: 'PBKDF2' }
* @returns String
*/
function abToB64(data) {
return btoa(String.fromCodePoint(...new Uint8Array(data)))
const outdata = []
const bytes = new Uint8Array(data)
for (let i = 0; i < bytes.byteLength; i++) {
outdata.push(String.fromCodePoint(bytes[i]))
}
return btoa(outdata.join(''))
}
/**
@ -43,8 +48,7 @@ function enc(plainText, passphrase) {
* @returns String
*/
function decrypt(passphrase, encData) {
const data = new Uint8Array(atob(encData).split('')
.map(c => c.charCodeAt(0)))
const data = new Uint8Array(b64ToAb(encData))
return deriveKey(passphrase, data.slice(8, 16))
.then(({ iv, key }) => window.crypto.subtle.decrypt({ iv, name: 'AES-CBC' }, key, data.slice(16)))
@ -74,7 +78,7 @@ function encrypt(passphrase, salt, plainData) {
return deriveKey(passphrase, salt)
.then(({ iv, key }) => window.crypto.subtle.encrypt({ iv, name: 'AES-CBC' }, key, new TextEncoder('utf8').encode(plainData)))
.then(encData => new Uint8Array([...opensslBanner, ...salt, ...new Uint8Array(encData)]))
.then(data => btoa(String.fromCharCode.apply(null, data)))
.then(data => abToB64(data.buffer))
}
/**