private-key: Add optional method that returns supported signature schemes
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@ -39,6 +39,19 @@ struct private_key_t {
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*/
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key_type_t (*get_type)(private_key_t *this);
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/**
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* Get signature schemes supported by this key.
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*
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* This is useful for keys that only support certain hash algorithms or
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* require specific parameters for RSA/PSS signatures.
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*
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* @note Implementing this method is optional. If multiple schemes are
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* returned, they should be ordered by decreasing preference.
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*
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* @return enumerator over signature_params_t*
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*/
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enumerator_t *(*supported_signature_schemes)(private_key_t *this);
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/**
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* Create a signature over a chunk of data.
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*
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