Rfc3161TimestampRequest.CreateFromHash Method

Definition

Namespace:

System.Security.Cryptography.Pkcs

Assembly:

System.Security.Cryptography.Pkcs.dll

Overloads

CreateFromHash(ReadOnlyMemory<Byte>, HashAlgorithmName, Oid, Nullable<ReadOnlyMemory<Byte>>, Boolean, X509ExtensionCollection)	Create a timestamp request using a pre-computed hash value and the name of the hash algorithm.
CreateFromHash(ReadOnlyMemory<Byte>, Oid, Oid, Nullable<ReadOnlyMemory<Byte>>, Boolean, X509ExtensionCollection)	Create a timestamp request using a pre-computed hash value and the Object Identifier for the hash algorithm.

CreateFromHash(ReadOnlyMemory<Byte>, HashAlgorithmName, Oid, Nullable<ReadOnlyMemory<Byte>>, Boolean, X509ExtensionCollection)

Source:

Rfc3161TimestampRequest.cs

Create a timestamp request using a pre-computed hash value and the name of the hash algorithm.

public static System.Security.Cryptography.Pkcs.Rfc3161TimestampRequest CreateFromHash (ReadOnlyMemory<byte> hash, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, System.Security.Cryptography.Oid? requestedPolicyId = default, ReadOnlyMemory<byte>? nonce = default, bool requestSignerCertificates = false, System.Security.Cryptography.X509Certificates.X509ExtensionCollection? extensions = default);

static member CreateFromHash : ReadOnlyMemory<byte> * System.Security.Cryptography.HashAlgorithmName * System.Security.Cryptography.Oid * Nullable<ReadOnlyMemory<byte>> * bool * System.Security.Cryptography.X509Certificates.X509ExtensionCollection -> System.Security.Cryptography.Pkcs.Rfc3161TimestampRequest

Public Shared Function CreateFromHash (hash As ReadOnlyMemory(Of Byte), hashAlgorithm As HashAlgorithmName, Optional requestedPolicyId As Oid = Nothing, Optional nonce As Nullable(Of ReadOnlyMemory(Of Byte)) = Nothing, Optional requestSignerCertificates As Boolean = false, Optional extensions As X509ExtensionCollection = Nothing) As Rfc3161TimestampRequest

Parameters

hash

ReadOnlyMemory<Byte>

The pre-computed hash value to be timestamped.

hashAlgorithm

HashAlgorithmName

The hash algorithm used to produce hash.

requestedPolicyId

Oid

The Object Identifier (OID) for the timestamp policy that the Timestamp Authority (TSA) should use, or null to express no preference.

nonce

Nullable<ReadOnlyMemory<Byte>>

An optional value used to uniquely match a request to a response, or null to not include a nonce in the request.

requestSignerCertificates

Boolean

true to indicate the Timestamp Authority (TSA) must include the signing certificate in the issued timestamp token; otherwise, false.

extensions

X509ExtensionCollection

An optional collection of extensions to include in the request.

Returns

Rfc3161TimestampRequest

An Rfc3161TimestampRequest representing the chosen values.

Exceptions

CryptographicException

hashAlgorithm is not a known hash algorithm.

Remarks

This method uses the hashAlgorithm parameter to determine the Object Identifier (OID) to include in the timestamp request. When building a request for a timestamp based on a hash algorithm that this method does not support, use the CreateFromHash(ReadOnlyMemory<Byte>, Oid, Oid, Nullable<ReadOnlyMemory<Byte>>, Boolean, X509ExtensionCollection) overload.

The nonce value in this method is treated as an unsigned, big-endian integer. This method normalizes the input to a BER INTEGER encoding before assigning the nonce value. The normalized value is returned by the GetNonce() method.

See also

• CreateFromData(ReadOnlySpan<Byte>, HashAlgorithmName, Oid, Nullable<ReadOnlyMemory<Byte>>, Boolean, X509ExtensionCollection)
• CreateFromHash(ReadOnlyMemory<Byte>, Oid, Oid, Nullable<ReadOnlyMemory<Byte>>, Boolean, X509ExtensionCollection)

CreateFromHash(ReadOnlyMemory<Byte>, Oid, Oid, Nullable<ReadOnlyMemory<Byte>>, Boolean, X509ExtensionCollection)

Source:

Rfc3161TimestampRequest.cs

Create a timestamp request using a pre-computed hash value and the Object Identifier for the hash algorithm.

public static System.Security.Cryptography.Pkcs.Rfc3161TimestampRequest CreateFromHash (ReadOnlyMemory<byte> hash, System.Security.Cryptography.Oid hashAlgorithmId, System.Security.Cryptography.Oid? requestedPolicyId = default, ReadOnlyMemory<byte>? nonce = default, bool requestSignerCertificates = false, System.Security.Cryptography.X509Certificates.X509ExtensionCollection? extensions = default);

static member CreateFromHash : ReadOnlyMemory<byte> * System.Security.Cryptography.Oid * System.Security.Cryptography.Oid * Nullable<ReadOnlyMemory<byte>> * bool * System.Security.Cryptography.X509Certificates.X509ExtensionCollection -> System.Security.Cryptography.Pkcs.Rfc3161TimestampRequest

Public Shared Function CreateFromHash (hash As ReadOnlyMemory(Of Byte), hashAlgorithmId As Oid, Optional requestedPolicyId As Oid = Nothing, Optional nonce As Nullable(Of ReadOnlyMemory(Of Byte)) = Nothing, Optional requestSignerCertificates As Boolean = false, Optional extensions As X509ExtensionCollection = Nothing) As Rfc3161TimestampRequest

Parameters

hash

ReadOnlyMemory<Byte>

The pre-computed hash value to be timestamped.

hashAlgorithmId

Oid

The Object Identifier (OID) for the hash algorithm that produced hash.

requestedPolicyId

Oid

The Object Identifier (OID) for a timestamp policy the Timestamp Authority (TSA) should use, or null to express no preference.

nonce

Nullable<ReadOnlyMemory<Byte>>

An optional nonce (number used once) to uniquely identify this request to pair it with the response. The value is interpreted as an unsigned big-endian integer and may be normalized to the encoding format.

requestSignerCertificates

Boolean

true to indicate the Timestamp Authority (TSA) must include the signing certificate in the issued timestamp token; otherwise, false.

extensions

X509ExtensionCollection

An optional collection of extensions to include in the request.

Returns

Rfc3161TimestampRequest

An Rfc3161TimestampRequest representing the chosen values.

Exceptions

ArgumentNullException

hashAlgorithmId is null.

CryptographicException

hashAlgorithmId.Value is not a valid OID.

Remarks

The nonce value in this method is treated as an unsigned, big-endian integer. This method normalizes the input to a BER INTEGER encoding before assigning the nonce value. The normalized value is returned by the GetNonce() method.