public static GostProviderParams ParamsForOids(params string[] oids)
{
if (oids == null || oids.Length == 0)
{
throw new ArgumentException();
}
var providerInfo = Providers.FirstOrDefault(x => x.IsCompatible(oids));
if (providerInfo == null)
{
return(null);
}
ProviderAlgo signAlgo = null, hashAlgo = null;
foreach (var oid in oids)
{
var algo = providerInfo.FirstOrDefault(x => x.Oid == oid);
if (algo != null)
{
if (algo.Class == CryptoApiEx.AlgClass.Hash)
{
hashAlgo = algo;
}
if (algo.Class == CryptoApiEx.AlgClass.Signature)
{
signAlgo = algo;
}
}
else
{
var sign = providerInfo.SignGroups.First(x => x.Oid == oid);
signAlgo = signAlgo ?? sign.SignAlgo;
hashAlgo = hashAlgo ?? sign.HashAlgo;
}
if (hashAlgo != null && signAlgo != null)
{
break;
}
}
//
if (hashAlgo == null && signAlgo == null)
{
return(null);
}
//
var result = new ConfigurableProviderParams()
{
Info = providerInfo,
SignAlgo = signAlgo,
HashAlgo = hashAlgo
};
return(result);
}
public static GostProviderParams ParamsForSignAlgoOid(string oid)
{
if (string.IsNullOrEmpty(oid))
{
throw new ArgumentException();
}
var providerInfo = Providers.FirstOrDefault(x => x.SignGroups.Any(y => y.Oid == oid));
if (providerInfo == null)
{
return(null);
}
var signGroup = providerInfo.SignGroups.First(x => x.Oid == oid);
var result = new ConfigurableProviderParams()
{
Info = providerInfo,
SignAlgo = signGroup.SignAlgo,
HashAlgo = signGroup.HashAlgo
};
return(result);
}
