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Fixed base64url implementation, was missing a conversion

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This commit is contained in:
Jonas Dellinger 2020-08-06 11:35:39 +00:00
parent f8b2787154
commit b084524814
1 changed files with 17 additions and 8 deletions
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25
SpotifyAPI.Web/Util/Base64Util.cs
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@ -25,6 +25,20 @@ namespace SpotifyAPI.Web
var buffer = new char[GetArraySizeRequiredToEncode(input.Length)];
var numBase64Chars = Convert.ToBase64CharArray(input, 0, input.Length, buffer, 0);
// Fix up '+' -> '-' and '/' -> '_'. Drop padding characters.
for (var i = 0; i < numBase64Chars; i++)
{
var ch = buffer[i];
if (ch == '+')
{
buffer[i] = '-';
}
else if (ch == '/')
{
buffer[i] = '_';
}
}
return new string(buffer, startIndex: 0, length: numBase64Chars);
}
@ -36,19 +50,14 @@ namespace SpotifyAPI.Web
throw new ArgumentNullException(nameof(input));
}
if (count == 0)
{
return Array.Empty<byte>();
}
// Assumption: input is base64url encoded without padding and contains no whitespace.
var paddingCharsToAdd = GetNumBase64PaddingCharsToAddForDecode(count);
var arraySizeRequired = checked(count + paddingCharsToAdd);
var paddingCharsToAdd = GetNumBase64PaddingCharsToAddForDecode(input.Length);
var arraySizeRequired = checked(input.Length + paddingCharsToAdd);
// Copy input into buffer, fixing up '-' -> '+' and '_' -> '/'.
var i = 0;
for (var j = 0; i < count; i++, j++)
for (var j = 0; i < input.Length; i++, j++)
{
var ch = input[j];
if (ch == '-')