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Strip the padding before decoding base32

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This commit is contained in:
Alexander Bakker 2019-03-23 12:56:59 +01:00
parent b036eb178b
commit 49f868357e
1 changed files with 11 additions and 0 deletions
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11
app/src/main/java/com/beemdevelopment/aegis/encoding/Base32.java
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@ -99,6 +99,17 @@ public class Base32 {
byte[] bytes = new byte[base32.length * 5 / 8];
for (i = 0, index = 0, offset = 0; i < base32.length; i++) {
// stop decoding when a padding char is encountered
if (base32[i] == '=') {
// make sure the rest is also padding, but don't bother verifying the length
for (int j = i + 1; j < base32.length; j++) {
if (base32[j] != '=') {
throw new Base32Exception("bad padding");
}
}
break;
}
lookup = base32[i] - '0';
digit = decodeDigit(lookup);