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| B_SignInit |
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B_SignInit |
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int B_SignInit ( |
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B_ALGORITHM_OBJ | algorithmObject, | /* algorithm object */ |
B_KEY_OBJ | keyObject, | /* key object */ |
B_ALGORITHM_CHOOSER algorithmChooser, | /* algorithm chooser */ | |
A_SURRENDER_CTX | *surrenderContext | /* surrender context */ |
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Description
B_SignInit initializes algorithmObject for computing a digital signature using the algorithm specified by a previous call to B_SetAlgorithmInfo. The chooser for selecting the algorithm method is algorithmChooser. The key object for supplying the key information is keyObject, which is typically a private key. The surrender context for processing and canceling during lengthy operations is surrenderContext; if its value is (A_SURRENDER_CTX *)NULL_PTR,
B_SignInit only needs to be called once to set up a signature algorithm. The
B_SignUpdate routine can be called multiple times to process blocks of data, and B_SignFinal is called once to process the last block, which includes producing the result. After B_SignFinal is called, B_SignUpdate can be called to start signing another sequence of blocks. There is no need to call B_SignInit again.
Return value
Value | Description |
0 | Operation was successful. |
see Appendix A, | |
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C h a p t e r 4 D e t a i l s o f C r y p t o - C F u n c t i o n s | 333 |
