Prepare to remove the EVP_PKEY_meth_* API

After removing the last caller of EVP_PKEY_meth_find() from libssl, none
of these is used. And with EVP_PKEY_meth_new() gone, there will no longer
be a way to get your hands onto an EVP_PKEY_METHOD that is writable, so
none of the silent failures (because they're void functions) should matter
in the few weeks until we bump.

ok jsing

1 files changed, 50 insertions, 89 deletions

diff --git a/lib/libcrypto/evp/pmeth_lib.c b/lib/libcrypto/evp/pmeth_lib.c
index 604181d3119..67ab72eff3f 100644
--- a/lib/libcrypto/evp/pmeth_lib.c
+++ b/lib/libcrypto/evp/pmeth_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: pmeth_lib.c,v 1.36 2024/01/04 20:15:01 tb Exp $ */
+/* $OpenBSD: pmeth_lib.c,v 1.37 2024/01/13 12:46:59 tb Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2006.
  */
@@ -101,14 +101,14 @@ static const EVP_PKEY_METHOD *pkey_methods[] = {
 
 #define N_PKEY_METHODS (sizeof(pkey_methods) / sizeof(pkey_methods[0]))
 
-const EVP_PKEY_METHOD *
-EVP_PKEY_meth_find(int type)
+static const EVP_PKEY_METHOD *
+evp_pkey_method_find(int nid)
 {
 	size_t i;
 
 	for (i = 0; i < N_PKEY_METHODS; i++) {
 		const EVP_PKEY_METHOD *pmeth = pkey_methods[i];
-		if (pmeth->pkey_id == type)
+		if (pmeth->pkey_id == nid)
 			return pmeth;
 	}
 
@@ -116,18 +116,18 @@ EVP_PKEY_meth_find(int type)
 }
 
 static EVP_PKEY_CTX *
-evp_pkey_ctx_new(EVP_PKEY *pkey, int id)
+evp_pkey_ctx_new(EVP_PKEY *pkey, int nid)
 {
 	EVP_PKEY_CTX *pkey_ctx = NULL;
 	const EVP_PKEY_METHOD *pmeth;
 
-	if (id == -1) {
+	if (nid == -1) {
 		if (pkey == NULL || pkey->ameth == NULL)
 			return NULL;
-		id = pkey->ameth->pkey_id;
+		nid = pkey->ameth->pkey_id;
 	}
 
-	if ((pmeth = EVP_PKEY_meth_find(id)) == NULL) {
+	if ((pmeth = evp_pkey_method_find(nid)) == NULL) {
 		EVPerror(EVP_R_UNSUPPORTED_ALGORITHM);
 		goto err;
 	}
@@ -154,50 +154,6 @@ evp_pkey_ctx_new(EVP_PKEY *pkey, int id)
 	return NULL;
 }
 
-EVP_PKEY_METHOD*
-EVP_PKEY_meth_new(int id, int flags)
-{
-	EVP_PKEY_METHOD *pmeth;
-
-	if ((pmeth = calloc(1, sizeof(EVP_PKEY_METHOD))) == NULL)
-		return NULL;
-
-	pmeth->pkey_id = id;
-	pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
-
-	return pmeth;
-}
-
-void
-EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags, const EVP_PKEY_METHOD *meth)
-{
-	if (ppkey_id)
-		*ppkey_id = meth->pkey_id;
-	if (pflags)
-		*pflags = meth->flags;
-}
-
-void
-EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
-{
-	EVP_PKEY_METHOD preserve;
-
-	preserve.pkey_id = dst->pkey_id;
-	preserve.flags = dst->flags;
-
-	*dst = *src;
-
-	dst->pkey_id = preserve.pkey_id;
-	dst->flags = preserve.flags;
-}
-
-void
-EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
-{
-	if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
-		free(pmeth);
-}
-
 EVP_PKEY_CTX *
 EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *engine)
 {
@@ -205,9 +161,9 @@ EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *engine)
 }
 
 EVP_PKEY_CTX *
-EVP_PKEY_CTX_new_id(int id, ENGINE *engine)
+EVP_PKEY_CTX_new_id(int nid, ENGINE *engine)
 {
-	return evp_pkey_ctx_new(NULL, id);
+	return evp_pkey_ctx_new(NULL, nid);
 }
 
 EVP_PKEY_CTX *
@@ -241,13 +197,6 @@ EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 	return NULL;
 }
 
-int
-EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
-{
-	EVPerror(ERR_R_DISABLED);
-	return 0;
-}
-
 void
 EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 {
@@ -399,25 +348,62 @@ EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 	return ctx->app_data;
 }
 
+/*
+ * Remove all the functions below in the next major bump
+ */
+
+const EVP_PKEY_METHOD *
+EVP_PKEY_meth_find(int type)
+{
+	EVPerror(ERR_R_DISABLED);
+	return NULL;
+}
+
+EVP_PKEY_METHOD*
+EVP_PKEY_meth_new(int id, int flags)
+{
+	EVPerror(ERR_R_DISABLED);
+	return NULL;
+}
+
+void
+EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags, const EVP_PKEY_METHOD *meth)
+{
+}
+
+void
+EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
+{
+}
+
+void
+EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
+{
+}
+
+int
+EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
+{
+	EVPerror(ERR_R_DISABLED);
+	return 0;
+}
+
 void
 EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
     int (*init)(EVP_PKEY_CTX *ctx))
 {
-	pmeth->init = init;
 }
 
 void
 EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
     int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
 {
-	pmeth->copy = copy;
 }
 
 void
 EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
     void (*cleanup)(EVP_PKEY_CTX *ctx))
 {
-	pmeth->cleanup = cleanup;
 }
 
 void
@@ -425,8 +411,6 @@ EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
     int (*paramgen_init)(EVP_PKEY_CTX *ctx),
     int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
 {
-	pmeth->paramgen_init = paramgen_init;
-	pmeth->paramgen = paramgen;
 }
 
 void
@@ -434,8 +418,6 @@ EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
     int (*keygen_init)(EVP_PKEY_CTX *ctx),
     int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
 {
-	pmeth->keygen_init = keygen_init;
-	pmeth->keygen = keygen;
 }
 
 void
@@ -444,8 +426,6 @@ EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
     int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
     const unsigned char *tbs, size_t tbslen))
 {
-	pmeth->sign_init = sign_init;
-	pmeth->sign = sign;
 }
 
 void
@@ -454,8 +434,6 @@ EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
     int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
     const unsigned char *tbs, size_t tbslen))
 {
-	pmeth->verify_init = verify_init;
-	pmeth->verify = verify;
 }
 
 void
@@ -465,8 +443,6 @@ EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
     unsigned char *sig, size_t *siglen,
     const unsigned char *tbs, size_t tbslen))
 {
-	pmeth->verify_recover_init = verify_recover_init;
-	pmeth->verify_recover = verify_recover;
 }
 
 void
@@ -475,8 +451,6 @@ EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
     int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
     EVP_MD_CTX *mctx))
 {
-	pmeth->signctx_init = signctx_init;
-	pmeth->signctx = signctx;
 }
 
 void
@@ -485,8 +459,6 @@ EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
     int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
     EVP_MD_CTX *mctx))
 {
-	pmeth->verifyctx_init = verifyctx_init;
-	pmeth->verifyctx = verifyctx;
 }
 
 void
@@ -495,8 +467,6 @@ EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
     int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
     const unsigned char *in, size_t inlen))
 {
-	pmeth->encrypt_init = encrypt_init;
-	pmeth->encrypt = encryptfn;
 }
 
 void
@@ -505,8 +475,6 @@ EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
     int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
     const unsigned char *in, size_t inlen))
 {
-	pmeth->decrypt_init = decrypt_init;
-	pmeth->decrypt = decrypt;
 }
 
 void
@@ -514,8 +482,6 @@ EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
     int (*derive_init)(EVP_PKEY_CTX *ctx),
     int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
 {
-	pmeth->derive_init = derive_init;
-	pmeth->derive = derive;
 }
 
 void
@@ -523,26 +489,21 @@ EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
     int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
     int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
 {
-	pmeth->ctrl = ctrl;
-	pmeth->ctrl_str = ctrl_str;
 }
 
 void
 EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth, int (*check)(EVP_PKEY *pkey))
 {
-	pmeth->check = check;
 }
 
 void
 EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
     int (*public_check)(EVP_PKEY *pkey))
 {
-	pmeth->public_check = public_check;
 }
 
 void
 EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
     int (*param_check)(EVP_PKEY *pkey))
 {
-	pmeth->param_check = param_check;
 }