Type Library SHA1 Final

QuickHash Library

Type Library

SHA1_Final

void SHA1_Final( [in, out]SHA1_Context* pContext, [out]SHA1_Digest* pDigest );

Parameters

pContext

[in/out] A memory buffer that is used as the context.

Note. All predefined types are specified in the Predefined Types List.

pDigest

[out] A memory buffer that will receive the message digest.

Note. All predefined types are specified in the Predefined Types List.

Remarks

Call this function to retrieve the SHA-1 message digest from the pContext context. The digest is retrieved in the pDigest memory buffer.

After the SHA1_Final function is performed, the context is initialized for new calculations, as it would be called SHA1_Init again.

Note. Before the first call to SHA1_Update, SHA1_UpdateStr, SHA1_Final or SHA1_FinalHex functions, the context must be initialized with SHA1_Init.

VB Example

Private Sub MyButton_Click()

    Dim Context As SHA1_Context

    Dim Digest As SHA1_Digest

    Dim MyStrData As String

    MyStrData = "Hello World!"

    Dim nLen As Long

    nLen = Len(MyStrData)

    'Convert the string to byte array

    Dim MyBinData() As Byte

    ReDim MyBinData(1 To nLen)

    For i = 1 To nLen

        MyBinData(i) = Asc(Mid(MyStrData, i, 1))

    Next i

    'Initialize the context

    SHA1_Init Context

    'Update the context with first part

    Dim nFirstLen As Long

    nFirstLen = nLen / 3

    SHA1_Update Context, MyBinData(1), nFirstLen

    'Update the context with second part

    SHA1_Update Context, MyBinData(nFirstLen + 1), nLen - nFirstLen

    'Get the digest

    SHA1_Final Context, Digest

    'Show the hexadecimal representation of the digest

    MsgBox QHASH_ConvertToHex(Digest.Value(0), SHA1_DIGESTSIZE, True)

End Sub

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