KeyDerivationParameters.BuildForSP80056a 메서드

정의

네임스페이스:

Windows.Security.Cryptography.Core

SP800-56A 키 파생 함수에서 사용할 KeyDerivationParameters 개체를 만듭니다.

public:
 static KeyDerivationParameters ^ BuildForSP80056a(IBuffer ^ algorithmId, IBuffer ^ partyUInfo, IBuffer ^ partyVInfo, IBuffer ^ suppPubInfo, IBuffer ^ suppPrivInfo);

 static KeyDerivationParameters BuildForSP80056a(IBuffer const& algorithmId, IBuffer const& partyUInfo, IBuffer const& partyVInfo, IBuffer const& suppPubInfo, IBuffer const& suppPrivInfo);

public static KeyDerivationParameters BuildForSP80056a(IBuffer algorithmId, IBuffer partyUInfo, IBuffer partyVInfo, IBuffer suppPubInfo, IBuffer suppPrivInfo);

function buildForSP80056a(algorithmId, partyUInfo, partyVInfo, suppPubInfo, suppPrivInfo)

Public Shared Function BuildForSP80056a (algorithmId As IBuffer, partyUInfo As IBuffer, partyVInfo As IBuffer, suppPubInfo As IBuffer, suppPrivInfo As IBuffer) As KeyDerivationParameters

매개 변수

algorithmId

IBuffer

파생 키의 용도를 지정합니다.

partyUInfo

IBuffer

초기자가 제공한 공개 정보를 포함합니다.

partyVInfo

IBuffer

응답자가 제공한 공개 정보를 포함합니다.

suppPubInfo

IBuffer

초기자와 응답자 모두에게 알려진 공개 정보를 포함합니다.

suppPrivInfo

IBuffer

초기자와 응답자 모두에게 알려진 개인 정보(예: 공유 비밀)를 포함합니다.

반환

KeyDerivationParameters

키 파생 중에 사용되는 매개 변수를 참조합니다.

예제

public void SampleDeriveFromSP80056a()
{
    // Create a string that contains the algorithm name.
    String strAlgName = KeyDerivationAlgorithmNames.Sp80056aConcatSha512;

    // Open the specified algorithm.
    KeyDerivationAlgorithmProvider objKdfProv = KeyDerivationAlgorithmProvider.OpenAlgorithm(strAlgName);

    // Specify the requested size, in bytes, of the derived key. 
    UInt32 targetSize = 32;

    // Create a buffer that contains the secret to be used during derivation.
    IBuffer buffSecret = CryptographicBuffer.GenerateRandom(32);

    // Create a buffer that contains the intended purpose of the derived key.
    String strAlgId = "Purpose";
    IBuffer buffAlgId = CryptographicBuffer.ConvertStringToBinary(strAlgId, BinaryStringEncoding.Utf8);

    // Create a buffer that contains public information contributed by the initiator.
    String strPartyUInfo = "Initiator public info";
    IBuffer buffPartyUInfo = CryptographicBuffer.ConvertStringToBinary(strPartyUInfo, BinaryStringEncoding.Utf8);

    // Create a buffer that contains public information contributed by the responder.
    String strPartyVInfo = "Responder public info";
    IBuffer buffPartyVInfo = CryptographicBuffer.ConvertStringToBinary(strPartyVInfo, BinaryStringEncoding.Utf8);

    // Create a buffer that contains public information known to both parties.
    String strSuppPubInfo = "Two party public info";
    IBuffer buffSuppPubInfo = CryptographicBuffer.ConvertStringToBinary(strSuppPubInfo, BinaryStringEncoding.Utf8);

    // Create a buffer that contains a shared private secret.
    IBuffer buffSuppPrivInfo = CryptographicBuffer.GenerateRandom(32);

    // Create the derivation parameters.
    KeyDerivationParameters kdf80056AParamsEx = KeyDerivationParameters.BuildForSP80056a(
        buffAlgId,
        buffPartyUInfo,
        buffPartyVInfo,
        buffSuppPubInfo,
        buffSuppPrivInfo);

    // Create a key from the secret value.
    CryptographicKey keyOriginal = objKdfProv.CreateKey(buffSecret);

    // Derive a key based on the original key and the derivation parameters.
    IBuffer keyDerived = CryptographicEngine.DeriveKeyMaterial(
        keyOriginal,
        kdf80056AParamsEx,
        targetSize);

    // Encode the key to a hexadecimal value (for display)
    String strKeyHex = CryptographicBuffer.EncodeToHexString(keyDerived);
}

설명

OpenAlgorithm 함수와 함께 다음 알고리즘 이름을 사용하여 SP80056a KDF 알고리즘 공급자를 열 수 있습니다.

• KeyDerivationAlgorithmNames.Sp80056aConcatMd5
• KeyDerivationAlgorithmNames.Sp80056aConcatSha1
• KeyDerivationAlgorithmNames.Sp80056aConcatSha256
• KeyDerivationAlgorithmNames.Sp80056aConcatSha384
• KeyDerivationAlgorithmNames.Sp80056aConcatSha512