Flatten the Curve 448 source structure

[openssl.git] / crypto / ec / ecx_meth.c

diff --git a/crypto/ec/ecx_meth.c b/crypto/ec/ecx_meth.c
index dbd53e00a7108176efb9938caf4a799cfcd0d099..4f7cfec728c33f5c1112ade371b5726eb3e32103 100644 (file)
--- a/crypto/ec/ecx_meth.c
+++ b/crypto/ec/ecx_meth.c
@@ -78,7 +78,7 @@ static int ecx_key_op(EVP_PKEY *pkey, int id, const X509_ALGOR *palg,
                 OPENSSL_free(xkey);
                 return 0;
             }
-            if (id == NID_X25519) {
+            if (id == EVP_PKEY_X25519) {
                 xkey->privkey[0] &= 248;
                 xkey->privkey[31] &= 127;
                 xkey->privkey[31] |= 64;
@@ -86,7 +86,7 @@ static int ecx_key_op(EVP_PKEY *pkey, int id, const X509_ALGOR *palg,
         } else {
             memcpy(xkey->privkey, p, X25519_KEYLEN);
         }
-        if (id == NID_X25519)
+        if (id == EVP_PKEY_X25519)
             X25519_public_from_private(xkey->pubkey, xkey->privkey);
         else
             ED25519_public_from_private(xkey->pubkey, xkey->privkey);
@@ -220,7 +220,7 @@ static void ecx_free(EVP_PKEY *pkey)
     X25519_KEY *xkey = pkey->pkey.ptr;
 
     if (xkey)
-        OPENSSL_secure_free(xkey->privkey);
+        OPENSSL_secure_clear_free(xkey->privkey, X25519_KEYLEN);
     OPENSSL_free(xkey);
 }
 
@@ -282,7 +282,8 @@ static int ecx_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
     switch (op) {
 
     case ASN1_PKEY_CTRL_SET1_TLS_ENCPT:
-        return ecx_key_op(pkey, NID_X25519, NULL, arg2, arg1, X25519_PUBLIC);
+        return ecx_key_op(pkey, EVP_PKEY_X25519, NULL, arg2, arg1,
+                          X25519_PUBLIC);
 
     case ASN1_PKEY_CTRL_GET1_TLS_ENCPT:
         if (pkey->pkey.ptr != NULL) {
@@ -305,8 +306,8 @@ static int ecx_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 }
 
 const EVP_PKEY_ASN1_METHOD ecx25519_asn1_meth = {
-    NID_X25519,
-    NID_X25519,
+    EVP_PKEY_X25519,
+    EVP_PKEY_X25519,
     0,
     "X25519",
     "OpenSSL X25519 algorithm",
@@ -339,9 +340,49 @@ static int ecd_size(const EVP_PKEY *pkey)
     return ED25519_SIGSIZE;
 }
 
+static int ecd_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
+                           X509_ALGOR *sigalg, ASN1_BIT_STRING *str,
+                           EVP_PKEY *pkey)
+{
+    const ASN1_OBJECT *obj;
+    int ptype;
+
+    X509_ALGOR_get0(&obj, &ptype, NULL, sigalg);
+    /* Sanity check: make sure it is ED25519 with absent parameters */
+    if (OBJ_obj2nid(obj) != NID_ED25519 || ptype != V_ASN1_UNDEF) {
+        ECerr(EC_F_ECD_ITEM_VERIFY, EC_R_INVALID_ENCODING);
+        return 0;
+    }
+
+    if (!EVP_DigestVerifyInit(ctx, NULL, NULL, NULL, pkey))
+        return 0;
+
+    return 2;
+}
+
+static int ecd_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
+                         X509_ALGOR *alg1, X509_ALGOR *alg2,
+                         ASN1_BIT_STRING *str)
+{
+    /* Set algorithms identifiers */
+    X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_ED25519), V_ASN1_UNDEF, NULL);
+    if (alg2)
+        X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_ED25519), V_ASN1_UNDEF, NULL);
+    /* Algorithm idetifiers set: carry on as normal */
+    return 3;
+}
+
+static int ecd_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *alg,
+                            const ASN1_STRING *sig)
+{
+    X509_SIG_INFO_set(siginf, NID_undef, NID_ED25519, X25519_SECURITY_BITS,
+                      X509_SIG_INFO_TLS);
+    return 1;
+}
+
 const EVP_PKEY_ASN1_METHOD ed25519_asn1_meth = {
-    NID_ED25519,
-    NID_ED25519,
+    EVP_PKEY_ED25519,
+    EVP_PKEY_ED25519,
     0,
     "ED25519",
     "OpenSSL ED25519 algorithm",
@@ -366,7 +407,10 @@ const EVP_PKEY_ASN1_METHOD ed25519_asn1_meth = {
     ecx_free,
     0,
     NULL,
-    NULL
+    NULL,
+    ecd_item_verify,
+    ecd_item_sign,
+    ecd_sig_info_set
 };
 
 static int pkey_ecx_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
@@ -408,7 +452,7 @@ static int pkey_ecx_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 }
 
 const EVP_PKEY_METHOD ecx25519_pkey_meth = {
-    NID_X25519,
+    EVP_PKEY_X25519,
     0, 0, 0, 0, 0, 0, 0,
     pkey_ecx_keygen,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -467,7 +511,7 @@ static int pkey_ecd_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 }
 
 const EVP_PKEY_METHOD ed25519_pkey_meth = {
-    NID_ED25519, EVP_PKEY_FLAG_SIGCTX_CUSTOM,
+    EVP_PKEY_ED25519, EVP_PKEY_FLAG_SIGCTX_CUSTOM,
     0, 0, 0, 0, 0, 0,
     pkey_ecx_keygen,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,