public StyleCspDirective AddHash(CspHashAlgorithm algorithm, string base64Nonce)
{
if (base64Nonce == null)
{
throw new ArgumentNullException(nameof(base64Nonce));
}
return(this.AddSource($"{algorithm.ToString().ToLower()}-{base64Nonce}"));
}
public ScriptCspDirective AddHashOf(byte[] content, CspHashAlgorithm algorithm = CspHashAlgorithm.Sha256)
{
if (content == null)
{
throw new ArgumentNullException(nameof(content));
}
using (var hashAlgorithm = algorithm.CreateHashAlgorithm())
return(this.AddHash(algorithm, hashAlgorithm.ComputeHash(content)));
}
public ScriptCspDirective AddHash(CspHashAlgorithm algorithm, string base64hash)
{
if (base64hash == null)
{
throw new ArgumentNullException(nameof(base64hash));
}
string algorithmName = algorithm.ToString().ToLowerInvariant();
return(this.AddSource($"'{algorithmName}-{base64hash}'"));
}
public CspDirective AddHash(CspHashAlgorithm algorithm, byte[] hash)
{
if (hash == null)
{
throw new ArgumentNullException(nameof(hash));
}
string algorithmName = algorithm.ToString().ToLowerInvariant();
string base64 = Convert.ToBase64String(hash);
return(this.AddSource($"'{algorithmName}-{base64}'"));
}
public static HashAlgorithm CreateHashAlgorithm(this CspHashAlgorithm algorithm)
{
switch (algorithm)
{
case CspHashAlgorithm.Sha256: return(SHA256.Create());
case CspHashAlgorithm.Sha384: return(SHA384.Create());
case CspHashAlgorithm.Sha512: return(SHA512.Create());
default: throw new NotSupportedException($"Could not create HashAlgorithm from '{algorithm}'.");
}
}
public ScriptCspDirective AddHashOf(string content, Encoding encoding, CspHashAlgorithm algorithm = CspHashAlgorithm.Sha256)
{
if (content == null)
{
throw new ArgumentNullException(nameof(content));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
byte[] rawContent = encoding.GetBytes(content);
using (var hashAlgorithm = algorithm.CreateHashAlgorithm())
return(this.AddHash(algorithm, hashAlgorithm.ComputeHash(rawContent)));
}
public StyleCspDirective AddHash(CspHashAlgorithm algorithm, byte[] hash)
{
return(this.AddHash(algorithm, Convert.ToBase64String(hash)));
}
public ScriptCspDirective AddHashOf(string content, CspHashAlgorithm algorithm = CspHashAlgorithm.Sha256) => this.AddHashOf(content, Encoding.UTF8, algorithm);
