> For the complete documentation index, see [llms.txt](https://sandbox-docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sandbox-docs.verifone.com/s-adk-5.1-programmers-guide/provider__keyservice_8h_source.md).

# provider\_keyservice.h

[Go to the documentation of this file.](/s-adk-5.1-programmers-guide/readme/files/dir_9ae62d232e1f8555f5337bbbbe2033a3/dir_a8642344d1890ac34080367e6f4e78c5/provider__keyservice_8h.md)

```cpp
 1 #ifndef ENGINE_KEYSERVICE_H_20251127
 2 #define ENGINE_KEYSERVICE_H_20251127
 3 
 4 #include <openssl/provider.h>
 5 
 6 #define KS_PKEY_PARAM_CERT "certificate" 
 7 #define KS_PKEY_PARAM_KEYREF "keyref" 
 41 enum KsTraceCbType
 42 {
 43  KsTraceErrorCb = 0,
 44  KsTraceDebugCb = 1
 45 };
 46 
 55 typedef void (*ks_trace_callback)(const char *file, unsigned line, const char *str);
 56 
 82 typedef int (*ks_set_trace_callback_fn)(OSSL_PROVIDER *provider, enum KsTraceCbType type, ks_trace_callback callback);
 83 
 84 #endif
```


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