[gnutls-devel] GnuTLS | pkcs11: ensure C_SignInit is called before C_Sign (!2016)

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Daiki Ueno commented: https://gitlab.com/gnutls/gnutls/-/merge_requests/2016#note_2735741109


> According to PKCS#11 specification v3.1 part 5.13.1, C_SignInit must be called before every C_Sign operation, otherwise the operation may return with CKR_OPERATION_NOT_INITIALIZED.

I know it's already closed, but I don't think this is the case; the [spec](https://docs.oasis-open.org/pkcs11/pkcs11-spec/v3.2/pkcs11-spec-v3.2.html#_Toc195693140) says "**To process additional data** (in single or multiple parts), the application MUST call C_SignInit again." In this case, the application calls C_Sign twice, first to determine the length of the signature, and then obtain the signature itself, calculated over the same data.

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