shake: update to use generated param decoders

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/28151)

diff --git a/providers/implementations/digests/sha3_prov.c.in b/providers/implementations/digests/sha3_prov.c.in
index a006cf485144df98d68fe01b00ed2a96cf6e532c..fdf591f35268cb63ed093a1c4715697f91aee97c 100644 (file)
--- a/providers/implementations/digests/sha3_prov.c.in
+++ b/providers/implementations/digests/sha3_prov.c.in
@@ -6,6 +6,9 @@
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */
+{-
+use OpenSSL::paramnames qw(produce_param_decoder);
+-}
 
 #include <string.h>
 #include <openssl/core_names.h>
@@ -14,6 +17,7 @@
 #include <openssl/params.h>
 #include <openssl/err.h>
 #include <openssl/proverr.h>
+#include "internal/cryptlib.h"
 #include "internal/numbers.h"
 #include "internal/sha3.h"
 #include "prov/digestcommon.h"
@@ -582,68 +586,58 @@ static void *keccak_dupctx(void *ctx)
     return ret;
 }
 
+{- produce_param_decoder('shake_get_ctx_params',
+                         (['DIGEST_PARAM_XOFLEN',   'xoflen',   'size_t'],
+                          ['DIGEST_PARAM_SIZE',     'size',     'size_t'],
+                         )); -}
+
 static const OSSL_PARAM *shake_gettable_ctx_params(ossl_unused void *ctx,
                                                    ossl_unused void *provctx)
 {
-    static const OSSL_PARAM known_shake_gettable_ctx_params[] = {
-        {OSSL_DIGEST_PARAM_XOFLEN, OSSL_PARAM_UNSIGNED_INTEGER, NULL, 0, 0},
-        {OSSL_DIGEST_PARAM_SIZE, OSSL_PARAM_UNSIGNED_INTEGER, NULL, 0, 0},
-        OSSL_PARAM_END
-    };
-    return known_shake_gettable_ctx_params;
+    return shake_get_ctx_params_list;
 }
 
 static int shake_get_ctx_params(void *vctx, OSSL_PARAM params[])
 {
-    OSSL_PARAM *p;
+    struct shake_get_ctx_params_st p;
     KECCAK1600_CTX *ctx = (KECCAK1600_CTX *)vctx;
 
-    if (ctx == NULL)
+    if (ctx == NULL || !shake_get_ctx_params_decoder(params, &p))
         return 0;
-    if (ossl_param_is_empty(params))
-        return 1;
 
-    p = OSSL_PARAM_locate(params, OSSL_DIGEST_PARAM_XOFLEN);
-    if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->md_size)) {
+    if (p.xoflen != NULL && !OSSL_PARAM_set_size_t(p.xoflen, ctx->md_size)) {
         ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
         return 0;
     }
-    /* Size is an alias of xoflen */
-    p = OSSL_PARAM_locate(params, OSSL_DIGEST_PARAM_SIZE);
-    if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->md_size)) {
+    /* Size is an alias of xoflen but separate them for compatibility */
+    if (p.size != NULL && !OSSL_PARAM_set_size_t(p.size, ctx->md_size)) {
         ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
         return 0;
     }
     return 1;
 }
 
+{- produce_param_decoder('shake_set_ctx_params',
+                         (['DIGEST_PARAM_XOFLEN',   'xoflen',   'size_t'],
+                          ['DIGEST_PARAM_SIZE',     'xoflen',   'size_t'],
+                         )); -}
+
 static const OSSL_PARAM *shake_settable_ctx_params(ossl_unused void *ctx,
                                                    ossl_unused void *provctx)
 {
-    static const OSSL_PARAM known_shake_settable_ctx_params[] = {
-        {OSSL_DIGEST_PARAM_XOFLEN, OSSL_PARAM_UNSIGNED_INTEGER, NULL, 0, 0},
-        {OSSL_DIGEST_PARAM_SIZE, OSSL_PARAM_UNSIGNED_INTEGER, NULL, 0, 0},
-        OSSL_PARAM_END
-    };
-
-    return known_shake_settable_ctx_params;
+    return shake_set_ctx_params_list;
 }
 
 static int shake_set_ctx_params(void *vctx, const OSSL_PARAM params[])
 {
-    const OSSL_PARAM *p;
+    struct shake_set_ctx_params_st p;
     KECCAK1600_CTX *ctx = (KECCAK1600_CTX *)vctx;
 
-    if (ossl_unlikely(ctx == NULL))
+    if (ossl_unlikely(ctx == NULL || !shake_set_ctx_params_decoder(params, &p)))
         return 0;
-    if (ossl_param_is_empty(params))
-        return 1;
-
-    p = OSSL_PARAM_locate_const(params, OSSL_DIGEST_PARAM_XOFLEN);
-    if (ossl_unlikely(p == NULL))
-        p = OSSL_PARAM_locate_const(params, OSSL_DIGEST_PARAM_SIZE);
 
-    if (ossl_unlikely(p != NULL && !OSSL_PARAM_get_size_t(p, &ctx->md_size))) {
+    if (ossl_unlikely(p.xoflen != NULL
+            && !OSSL_PARAM_get_size_t(p.xoflen, &ctx->md_size))) {
         ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
         return 0;
     }