public override void SetHash(byte[] content)
{
if (Hash is null)
{
KeccakManaged keccak = new KeccakManaged(512);
List <string> entitesHashes = new List <string>();
foreach (var e in Entities)
{
entitesHashes.Add(e.GetHash());
}
List <byte> buffer = new List <byte>();
foreach (var eh in entitesHashes)
{
buffer.AddRange(Encoding.UTF8.GetBytes(eh));
}
var buf = keccak.ComputeHash(buffer.ToArray());
StringBuilder sb = new StringBuilder();
foreach (var b in buf)
{
sb.Append(b.ToString("X2"));
}
Hash = sb.ToString();
}
else
{
throw new AccessViolationException("Hash can only be set once");
}
}
/// <summary>
/// Creates and set hash for file instance.
/// </summary>
/// <param name="content">
/// Raw bytes of file if needed in byte array.
/// Only needed for <see cref="File.IsSingleBlock">Single Blocked files</see>.
/// </param>
/// <remarks>
/// It would be better if hash was created during the upload,
/// but it impossible, due to nature of this library and purposes.
/// So, the best approach is to upload a file to IPFS, retrieve it and set content manually.
/// </remarks>
/// <exception cref="Exception"/>
public void SetHash(byte[] content)
{
if (Hash is null)
{
KeccakManaged keccak = new KeccakManaged(512);
if (this.IsSingleBlock)
{
if (content == null)
{
throw new ArgumentException("This file is single block and must be provided with byte array of content", "content");
}
else
{
var buf = keccak.ComputeHash(content);
StringBuilder sb = new StringBuilder();
foreach (var b in buf)
{
sb.Append(b.ToString("X2"));
}
Hash = sb.ToString();
}
}
else
{
List <string> blockHashes = new List <string>();
foreach (var b in Blocks)
{
blockHashes.Add(b.Hash);
}
List <byte> buffer = new List <byte>();
foreach (var bh in blockHashes)
{
buffer.AddRange(Encoding.UTF8.GetBytes(bh));
}
var buf = keccak.ComputeHash(buffer.ToArray());
StringBuilder sb = new StringBuilder();
foreach (var b in buf)
{
sb.Append(b.ToString("X2"));
}
Hash = sb.ToString();
}
}
else
{
throw new AccessViolationException("Hash can only be set once");
}
}
/// <summary>
/// Creates and set hash for block instance.
/// </summary>
/// <param name="content">
/// Raw bytes of block in byte array.
/// </param>
/// <remarks>
/// It would be better if block was creating it own hash during the upload,
/// but it impossible, due to nature of this library and purposes.
/// So, the best approach is to upload a file to IPFS, retrieve block and set it manually.
/// </remarks>
public void SetHash(byte[] content)
{
if (Hash is null)
{
KeccakManaged keccak = new KeccakManaged(512);
var buf = keccak.ComputeHash(content);
StringBuilder sb = new StringBuilder();
foreach (var b in buf)
{
sb.Append(b.ToString("X2"));
}
Hash = sb.ToString();
}
else
{
throw new AccessViolationException("Hash can only be set once");
}
}