doc: note that get_params and set_params calls should return true if the param array is null

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/14383)

doc/man7/provider-asym_cipher.pod

@@ -173,9 +173,12 @@ functions.
 OSSL_FUNC_asym_cipher_get_ctx_params() gets asymmetric cipher parameters associated
 with the given provider side asymmetric cipher context I<ctx> and stores them in
 I<params>.
+Passing NULL for I<params> should return true.
+
 OSSL_FUNC_asym_cipher_set_ctx_params() sets the asymmetric cipher parameters associated
 with the given provider side asymmetric cipher context I<ctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 Parameters currently recognised by built-in asymmetric cipher algorithms are as
 follows.

doc/man7/provider-cipher.pod

@@ -186,9 +186,11 @@ and stores them in I<params>.
 OSSL_FUNC_cipher_set_ctx_params() sets cipher operation parameters for the
 provider side cipher context I<cctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_cipher_get_ctx_params() gets cipher operation details details from
 the given provider side cipher context I<cctx> and stores them in I<params>.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_cipher_gettable_params(), OSSL_FUNC_cipher_gettable_ctx_params(),
 and OSSL_FUNC_cipher_settable_ctx_params() all return constant B<OSSL_PARAM>

doc/man7/provider-digest.pod

@@ -152,9 +152,11 @@ and stores them in I<params>.
 OSSL_FUNC_digest_set_ctx_params() sets digest operation parameters for the
 provider side digest context I<dctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_digest_get_ctx_params() gets digest operation details details from
 the given provider side digest context I<dctx> and stores them in I<params>.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_digest_gettable_params() returns a constant B<OSSL_PARAM> array
 containing descriptors of the parameters that OSSL_FUNC_digest_get_params()

doc/man7/provider-encoder.pod

@@ -197,6 +197,7 @@ OSSL_FUNC_encoder_newctx().
 OSSL_FUNC_encoder_set_ctx_params() sets context data according to parameters
 from I<params> that it recognises.  Unrecognised parameters should be
 ignored.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_encoder_settable_ctx_params() returns a constant B<OSSL_PARAM>
 array describing the parameters that OSSL_FUNC_encoder_set_ctx_params()

doc/man7/provider-kdf.pod

@@ -127,9 +127,11 @@ provider algorithm and stores them in I<params>.
 OSSL_FUNC_kdf_set_ctx_params() sets KDF parameters associated with the given
 provider side KDF context I<kctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_kdf_get_ctx_params() retrieves gettable parameter values associated
 with the given provider side KDF context I<kctx> and stores them in I<params>.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_kdf_gettable_params(), OSSL_FUNC_kdf_gettable_ctx_params(),
 and OSSL_FUNC_kdf_settable_ctx_params() all return constant B<OSSL_PARAM>

doc/man7/provider-kem.pod

@@ -171,9 +171,12 @@ functions.
 OSSL_FUNC_kem_get_ctx_params() gets asymmetric kem parameters associated
 with the given provider side asymmetric kem context I<ctx> and stores them in
 I<params>.
+Passing NULL for I<params> should return true.
+
 OSSL_FUNC_kem_set_ctx_params() sets the asymmetric kem parameters associated
 with the given provider side asymmetric kem context I<ctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 No parameters are currently recognised by built-in asymmetric kem algorithms.
 

doc/man7/provider-keyexch.pod

@@ -139,10 +139,12 @@ OSSL_FUNC_keyexch_set_ctx_params() sets key exchange parameters associated with
 given provider side key exchange context I<ctx> to I<params>,
 see L</Common Key Exchange parameters>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_keyexch_get_ctx_params() gets key exchange parameters associated with the
 given provider side key exchange context I<ctx> into I<params>,
 see L</Common Key Exchange parameters>.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_keyexch_settable_ctx_params() yields a constant B<OSSL_PARAM> array that
 describes the settable parameters, i.e. parameters that can be used with

doc/man7/provider-mac.pod

@@ -137,10 +137,12 @@ provider algorithm and stores them in I<params>.
 OSSL_FUNC_mac_set_ctx_params() sets mac parameters associated with the given
 provider side mac context I<mctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_mac_get_ctx_params() gets details of currently set parameter values
 associated with the given provider side mac context I<mctx> and stores them
 in I<params>.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_mac_gettable_params(), OSSL_FUNC_mac_gettable_ctx_params(),
 and OSSL_FUNC_mac_settable_ctx_params() all return constant B<OSSL_PARAM>

doc/man7/provider-rand.pod

@@ -160,10 +160,12 @@ provider algorithm and stores them in I<params>.
 OSSL_FUNC_rand_set_ctx_params() sets rand parameters associated with the given
 provider side rand context I<ctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_rand_get_ctx_params() gets details of currently set parameter values
 associated with the given provider side rand context I<ctx> and stores them
 in I<params>.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_rand_gettable_params(), OSSL_FUNC_rand_gettable_ctx_params(),
 and OSSL_FUNC_rand_settable_ctx_params() all return constant B<OSSL_PARAM>

doc/man7/provider-signature.pod

@@ -332,9 +332,12 @@ the OSSL_FUNC_signature_get_ctx_params() and OSSL_FUNC_signature_set_ctx_params(
 
 OSSL_FUNC_signature_get_ctx_params() gets signature parameters associated with the
 given provider side signature context I<ctx> and stored them in I<params>.
+Passing NULL for I<params> should return true.
+
 OSSL_FUNC_signature_set_ctx_params() sets the signature parameters associated with the
 given provider side signature context I<ctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 Common parameters currently recognised by built-in signature algorithms are as
 follows.
@@ -391,9 +394,12 @@ functions.
 
 OSSL_FUNC_signature_get_md_ctx_params() gets digest parameters associated with the
 given provider side digest signature context I<ctx> and stores them in I<params>.
+Passing NULL for I<params> should return true.
+
 OSSL_FUNC_signature_set_ms_ctx_params() sets the digest parameters associated with the
 given provider side digest signature context I<ctx> to I<params>.
 Any parameter settings are additional to any that were previously set.
+Passing NULL for I<params> should return true.
 
 Parameters currently recognised by built-in signature algorithms are the same
 as those for built-in digest algorithms. See

doc/man7/provider-storemgmt.pod

@@ -89,6 +89,7 @@ OSSL_FUNC_store_set_ctx_params() should set additional parameters, such as what
 kind of data to expect, search criteria, and so on.  More on those below, in
 L</Load Parameters>.  Whether unrecognised parameters are an error or simply
 ignored is at the implementation's discretion.
+Passing NULL for I<params> should return true.
 
 OSSL_FUNC_store_load() loads the next object from the URI opened by
 OSSL_FUNC_store_open(), creates an object abstraction for it (see