2 * Copyright 2020-2023 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include <openssl/err.h>
12 #include <openssl/proverr.h>
13 #include "crypto/ecx.h"
14 #include "internal/common.h" /* for ossl_assert() */
17 # include "s390x_arch.h"
20 ECX_KEY *ossl_ecx_key_new(OSSL_LIB_CTX *libctx, ECX_KEY_TYPE type, int haspubkey,
23 ECX_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
29 ret->haspubkey = haspubkey;
31 case ECX_KEY_TYPE_X25519:
32 ret->keylen = X25519_KEYLEN;
34 case ECX_KEY_TYPE_X448:
35 ret->keylen = X448_KEYLEN;
37 case ECX_KEY_TYPE_ED25519:
38 ret->keylen = ED25519_KEYLEN;
40 case ECX_KEY_TYPE_ED448:
41 ret->keylen = ED448_KEYLEN;
46 if (!CRYPTO_NEW_REF(&ret->references, 1))
50 ret->propq = OPENSSL_strdup(propq);
51 if (ret->propq == NULL)
57 OPENSSL_free(ret->propq);
58 CRYPTO_FREE_REF(&ret->references);
64 void ossl_ecx_key_free(ECX_KEY *key)
71 CRYPTO_DOWN_REF(&key->references, &i);
72 REF_PRINT_COUNT("ECX_KEY", key);
75 REF_ASSERT_ISNT(i < 0);
77 OPENSSL_free(key->propq);
78 OPENSSL_secure_clear_free(key->privkey, key->keylen);
79 CRYPTO_FREE_REF(&key->references);
83 void ossl_ecx_key_set0_libctx(ECX_KEY *key, OSSL_LIB_CTX *libctx)
88 int ossl_ecx_key_up_ref(ECX_KEY *key)
92 if (CRYPTO_UP_REF(&key->references, &i) <= 0)
95 REF_PRINT_COUNT("ECX_KEY", key);
96 REF_ASSERT_ISNT(i < 2);
97 return ((i > 1) ? 1 : 0);
100 unsigned char *ossl_ecx_key_allocate_privkey(ECX_KEY *key)
102 key->privkey = OPENSSL_secure_zalloc(key->keylen);
107 int ossl_ecx_compute_key(ECX_KEY *peer, ECX_KEY *priv, size_t keylen,
108 unsigned char *secret, size_t *secretlen, size_t outlen)
111 || priv->privkey == NULL
113 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_KEY);
117 if (!ossl_assert(keylen == X25519_KEYLEN
118 || keylen == X448_KEYLEN)) {
119 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
123 if (secret == NULL) {
127 if (outlen < keylen) {
128 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
132 if (keylen == X25519_KEYLEN) {
134 if (OPENSSL_s390xcap_P.pcc[1]
135 & S390X_CAPBIT(S390X_SCALAR_MULTIPLY_X25519)) {
136 if (s390x_x25519_mul(secret, peer->pubkey, priv->privkey) == 0) {
137 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_DURING_DERIVATION);
142 if (ossl_x25519(secret, priv->privkey, peer->pubkey) == 0) {
143 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_DURING_DERIVATION);
148 if (OPENSSL_s390xcap_P.pcc[1]
149 & S390X_CAPBIT(S390X_SCALAR_MULTIPLY_X448)) {
150 if (s390x_x448_mul(secret, peer->pubkey, priv->privkey) == 0) {
151 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_DURING_DERIVATION);
156 if (ossl_x448(secret, priv->privkey, peer->pubkey) == 0) {
157 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_DURING_DERIVATION);