/// <summary>Verifies that a digital signature is valid by determining the hash value in the signature using the provided public key and comparing it to the provided hash value.</summary>
/// <returns>true if the signature is valid; otherwise, false.</returns>
/// <param name="rgbHash">The hash value of the signed data. </param>
/// <param name="str">The hash algorithm identifier (OID) used to create the hash value of the data. </param>
/// <param name="rgbSignature">The signature data to use for verification. </param>
/// <exception cref="T:System.ArgumentNullException">The <paramref name="rgbHash" /> parameter is null.-or- The <paramref name="rgbSignature" /> parameter is null. </exception>
/// <exception cref="T:System.Security.Cryptography.CryptographicException">The cryptographic service provider (CSP) cannot be acquired.-or- The signature cannot be verified. </exception>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.KeyContainerPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public bool VerifyHash(byte[] rgbHash, string str, byte[] rgbSignature)
{
if (rgbHash == null)
{
throw new ArgumentNullException("rgbHash");
}
if (rgbSignature == null)
{
throw new ArgumentNullException("rgbSignature");
}
string hashName = (str != null) ? this.GetHashNameFromOID(str) : "SHA1";
HashAlgorithm hash = HashAlgorithm.Create(hashName);
return(PKCS1.Verify_v15(this, hash, rgbHash, rgbSignature));
}
/// <summary>Verifies that a digital signature is valid by determining the hash value in the signature using the provided public key and comparing it to the hash value of the provided data.</summary>
/// <returns>true if the signature is valid; otherwise, false.</returns>
/// <param name="buffer">The data that was signed. </param>
/// <param name="halg">The name of the hash algorithm used to create the hash value of the data. </param>
/// <param name="signature">The signature data to use for verification. </param>
/// <exception cref="T:System.ArgumentNullException">The <paramref name="halg" /> parameter is null. </exception>
/// <exception cref="T:System.ArgumentException">The <paramref name="halg" /> parameter is not a valid type. </exception>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.KeyContainerPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public bool VerifyData(byte[] buffer, object halg, byte[] signature)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (signature == null)
{
throw new ArgumentNullException("signature");
}
HashAlgorithm hash = this.GetHash(halg);
byte[] hashValue = hash.ComputeHash(buffer);
return(PKCS1.Verify_v15(this, hash, hashValue, signature));
}
public bool VerifyHash(byte[] rgbHash, string str, byte[] rgbSignature)
{
if (rgbHash == null)
{
throw new ArgumentNullException("rgbHash");
}
if (rgbSignature == null)
{
throw new ArgumentNullException("rgbSignature");
}
// Fx 2.0 defaults to the SHA-1
string hashName = (str == null) ? "SHA1" : GetHashNameFromOID(str);
HashAlgorithm hash = HashAlgorithm.Create(hashName);
return(PKCS1.Verify_v15(this, hash, rgbHash, rgbSignature));
}
// NOTE: this method can work with ANY configured (OID in machine.config)
// HashAlgorithm descendant
public bool VerifyData(byte[] buffer, object halg, byte[] signature)
{
#if NET_1_1
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
#endif
if (signature == null)
{
throw new ArgumentNullException("signature");
}
HashAlgorithm hash = GetHash(halg);
byte[] toBeVerified = hash.ComputeHash(buffer);
return(PKCS1.Verify_v15(this, hash, toBeVerified, signature));
}
/// <summary>Verifies the <see cref="T:System.Security.Cryptography.RSA" /> PKCS#1 signature for the specified data.</summary>
/// <returns>true if <paramref name="rgbSignature" /> matches the signature computed using the specified hash algorithm and key on <paramref name="rgbHash" />; otherwise, false.</returns>
/// <param name="rgbHash">The data signed with <paramref name="rgbSignature" />. </param>
/// <param name="rgbSignature">The signature to be verified for <paramref name="rgbHash" />. </param>
/// <exception cref="T:System.Security.Cryptography.CryptographicUnexpectedOperationException">The key is null.-or- The hash algorithm is null. </exception>
/// <exception cref="T:System.ArgumentNullException">The <paramref name="rgbHash" /> parameter is null.-or- The <paramref name="rgbSignature" /> parameter is null. </exception>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.KeyContainerPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override bool VerifySignature(byte[] rgbHash, byte[] rgbSignature)
{
if (this.rsa == null)
{
throw new CryptographicUnexpectedOperationException(Locale.GetText("No public key available."));
}
if (this.hashName == null)
{
throw new CryptographicUnexpectedOperationException(Locale.GetText("Missing hash algorithm."));
}
if (rgbHash == null)
{
throw new ArgumentNullException("rgbHash");
}
if (rgbSignature == null)
{
throw new ArgumentNullException("rgbSignature");
}
return(PKCS1.Verify_v15(this.rsa, HashAlgorithm.Create(this.hashName), rgbHash, rgbSignature));
}
// LAMESPEC: str is not the hash name but an OID
// NOTE: this method is LIMITED to SHA1 and MD5 like the MS framework 1.0
// and 1.1 because there's no method to get a hash algorithm from an OID.
// However there's no such limit when using the [De]Formatter class.
public bool VerifyHash(byte[] rgbHash, string str, byte[] rgbSignature)
{
if (rgbHash == null)
{
throw new ArgumentNullException("rgbHash");
}
if (rgbSignature == null)
{
throw new ArgumentNullException("rgbSignature");
}
#if NET_2_0
// Fx 2.0 defaults to the SHA-1
string hashName = (str == null) ? "SHA1" : GetHashNameFromOID(str);
#else
if (str == null)
{
throw new CryptographicException(Locale.GetText("No OID specified"));
}
string hashName = GetHashNameFromOID(str);
#endif
HashAlgorithm hash = HashAlgorithm.Create(hashName);
return(PKCS1.Verify_v15(this, hash, rgbHash, rgbSignature));
}
bool VerifyHash(byte[] rgbHash, int calgHash, byte[] rgbSignature)
{
return(PKCS1.Verify_v15(this, InternalHashToHashAlgorithm(calgHash), rgbHash, rgbSignature));
}