Make evp_pkey_ctx_get0_libctx/propq public API

These were previously added as an internal API. But since the CMS code
needs them, other code might do too.

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/13088)

crypto/cms/cms_ec.c

@@ -100,10 +100,9 @@ static int ecdh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
         if (!EVP_PKEY_copy_parameters(pkpeer, pk))
             goto err;
     } else {
-        /* TODO(3.0): Should the get0_libctx/propq calls actually be public API? */
         pkpeer = pkey_type2param(atype, aval,
-                                 evp_pkey_ctx_get0_libctx(pctx),
-                                 evp_pkey_ctx_get0_propq(pctx));
+                                 EVP_PKEY_CTX_get0_libctx(pctx),
+                                 EVP_PKEY_CTX_get0_propq(pctx));
         if (pkpeer == NULL)
             goto err;
     }

crypto/evp/pmeth_lib.c

@@ -1762,12 +1762,12 @@ int evp_pkey_ctx_use_cached_data(EVP_PKEY_CTX *ctx)
     return ret;
 }
 
-OPENSSL_CTX *evp_pkey_ctx_get0_libctx(EVP_PKEY_CTX *ctx)
+OPENSSL_CTX *EVP_PKEY_CTX_get0_libctx(EVP_PKEY_CTX *ctx)
 {
     return ctx->libctx;
 }
 
-const char *evp_pkey_ctx_get0_propq(EVP_PKEY_CTX *ctx)
+const char *EVP_PKEY_CTX_get0_propq(EVP_PKEY_CTX *ctx)
 {
     return ctx->propquery;
 }

doc/man3/EVP_PKEY_CTX_get0_libctx.pod

@@ -0,0 +1,45 @@
+=pod
+
+=head1 NAME
+
+EVP_PKEY_CTX_get0_libctx,
+EVP_PKEY_CTX_get0_propq
+- functions for getting OPENSSL_CTX and property query data from an EVP_PKEY_CTX
+
+=head1 SYNOPSIS
+
+ #include <openssl/evp.h>
+
+ OPENSSL_CTX *EVP_PKEY_CTX_get0_libctx(EVP_PKEY_CTX *ctx);
+ const char *EVP_PKEY_CTX_get0_propq(EVP_PKEY_CTX *ctx);
+
+=head1 DESCRIPTION
+
+The EVP_PKEY_CTX_get0_libctx() and EVP_PKEY_CTX_get0_propq() functions obtain
+the OPENSSL_CTX and property query string values respectively that were
+associated with the EVP_PKEY_CTX when it was constructed.
+
+=head1 RETURN VALUES
+
+EVP_PKEY_CTX_get0_libctx() and EVP_PKEY_CTX_get0_propq() functions return the
+OPENSSL_CTX and property query string associated with the EVP_PKEY_CTX or NULL
+if they are not set. The returned values should not be freed by the caller.
+
+=head1 SEE ALSO
+
+L<EVP_PKEY_CTX_new(3)>
+
+=head1 HISTORY
+
+All functions were added in OpenSSL 3.0.
+
+=head1 COPYRIGHT
+
+Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the Apache License 2.0 (the "License").  You may not use
+this file except in compliance with the License.  You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut

include/crypto/evp.h

@@ -835,8 +835,6 @@ int evp_pkey_ctx_get1_id_len_prov(EVP_PKEY_CTX *ctx, size_t *id_len);
 
 int evp_pkey_ctx_use_cached_data(EVP_PKEY_CTX *ctx);
 #endif /* !defined(FIPS_MODULE) */
-OPENSSL_CTX *evp_pkey_ctx_get0_libctx(EVP_PKEY_CTX *ctx);
-const char *evp_pkey_ctx_get0_propq(EVP_PKEY_CTX *ctx);
 void evp_method_store_flush(OPENSSL_CTX *libctx);
 int evp_set_default_properties_int(OPENSSL_CTX *libctx, const char *propq,
                                    int loadconfig);

include/openssl/evp.h

@@ -1966,6 +1966,9 @@ int EVP_hex2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
 int EVP_PKEY_CTX_set_group_name(EVP_PKEY_CTX *ctx, const char *name);
 int EVP_PKEY_CTX_get_group_name(EVP_PKEY_CTX *ctx, char *name, size_t namelen);
 
+OPENSSL_CTX *EVP_PKEY_CTX_get0_libctx(EVP_PKEY_CTX *ctx);
+const char *EVP_PKEY_CTX_get0_propq(EVP_PKEY_CTX *ctx);
+
 # ifdef  __cplusplus
 }
 # endif

util/libcrypto.num

@@ -5288,3 +5288,5 @@ PKCS7_type_is_other                     ?	3_0_0	EXIST::FUNCTION:
 PKCS7_get_octet_string                  ?	3_0_0	EXIST::FUNCTION:
 OSSL_DECODER_from_data                  ?	3_0_0	EXIST::FUNCTION:
 OSSL_ENCODER_to_data                    ?	3_0_0	EXIST::FUNCTION:
+EVP_PKEY_CTX_get0_libctx                ?	3_0_0	EXIST::FUNCTION:
+EVP_PKEY_CTX_get0_propq                 ?	3_0_0	EXIST::FUNCTION: