QuickHash Library

Type Library

SHA256_UpdateStr

void SHA256_UpdateStr( [ in,out ]SHA256_Context* pContext, [ in , string ] unsigned char* pSrc );

Parameters

pContext

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

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

 pSrc

    [in] A null-terminated string with which to update the context.

Remarks

Updates (based on SHA-2(256) hash algorithm) the pContext context with the null-terminated string specified by pSrc. Call this function for each null-terminated string for which the message digest is calculated. To retrieve the digest after using SHA256_UpdateStr, call SHA256_Final or SHA256_FinalHex.

Note. Before the first call to SHA256_Update, SHA256_UpdateStr, SHA256_Final or SHA256_FinalHex functions, the context must be initialized with SHA256_Init.

VB Example

Private Sub MyButton_Click()   

    Dim Context As SHA256_Context

    Dim Digest As SHA256_Digest

    Dim MyStrData As String

    MyStrData = "Hello World!"

    'Initialize the context

    SHA256_Init Context

    'Update the context

    SHA256_UpdateStr Context, MyStrData

    'Get the digest

    SHA256_Final Context, Digest

    'Show the hexadecimal representation of the digest

    MsgBox QHASH_ConvertToHex(Digest.Value(0), SHA256_DIGESTSIZE, True)

End Sub

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See Also    SHA256_Update, SHA256_Final, SHA256_FinalHex, SHA256_Init, QHASH_ConvertToHex