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Corrected checksum calculation errors.

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This commit is contained in:
Natalia Portillo
2017-06-29 22:30:03 +01:00
parent 08cbe92709
commit 4620115967
5 changed files with 23 additions and 14 deletions
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15
DiscImageChef.Checksums/Adler32Context.cs
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@@ -79,6 +79,7 @@ namespace DiscImageChef.Checksums
public byte[] Final()
{
uint finalSum = (uint)((sum2 << 16) | sum1);
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
return BigEndianBitConverter.GetBytes(finalSum);
}
@@ -90,6 +91,7 @@ namespace DiscImageChef.Checksums
uint finalSum = (uint)((sum2 << 16) | sum1);
StringBuilder adlerOutput = new StringBuilder();
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
for(int i = 0; i < BigEndianBitConverter.GetBytes(finalSum).Length; i++)
{
adlerOutput.Append(BigEndianBitConverter.GetBytes(finalSum)[i].ToString("x2"));
@@ -123,12 +125,16 @@ namespace DiscImageChef.Checksums
localSum1 = 1;
localSum2 = 0;
localSum1 = (ushort)((localSum1 + fileStream.ReadByte()) % AdlerModule);
localSum2 = (ushort)((localSum2 + localSum1) % AdlerModule);
for(int i = 0; i < fileStream.Length; i++)
{
localSum1 = (ushort)((localSum1 + fileStream.ReadByte()) % AdlerModule);
localSum2 = (ushort)((localSum2 + localSum1) % AdlerModule);
}
finalSum = (uint)((localSum2 << 16) | localSum1);
hash = BitConverter.GetBytes(finalSum);
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
hash = BigEndianBitConverter.GetBytes(finalSum);
StringBuilder adlerOutput = new StringBuilder();
@@ -164,7 +170,8 @@ namespace DiscImageChef.Checksums
finalSum = (uint)((localSum2 << 16) | localSum1);
hash = BitConverter.GetBytes(finalSum);
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
hash = BigEndianBitConverter.GetBytes(finalSum);
StringBuilder adlerOutput = new StringBuilder();