2 * Copyright (c) 2019 Yubico AB. All rights reserved.
3 * Use of this source code is governed by a BSD-style
4 * license that can be found in the LICENSE file.
7 #include <openssl/bn.h>
8 #include <openssl/obj_mac.h>
11 #include "fido/eddsa.h"
13 #if defined(LIBRESSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER < 0x10101000L
15 EVP_PKEY_new_raw_public_key(int type, ENGINE *e, const unsigned char *key,
23 fido_log_debug("%s: unimplemented", __func__);
29 EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
36 fido_log_debug("%s: unimplemented", __func__);
42 EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret, size_t siglen,
43 const unsigned char *tbs, size_t tbslen)
51 fido_log_debug("%s: unimplemented", __func__);
55 #endif /* LIBRESSL_VERSION_NUMBER || OPENSSL_VERSION_NUMBER < 0x10101000L */
57 #if OPENSSL_VERSION_NUMBER < 0x10100000L
61 fido_log_debug("%s: unimplemented", __func__);
67 EVP_MD_CTX_free(EVP_MD_CTX *ctx)
71 #endif /* OPENSSL_VERSION_NUMBER < 0x10100000L */
74 decode_coord(const cbor_item_t *item, void *xy, size_t xy_len)
76 if (cbor_isa_bytestring(item) == false ||
77 cbor_bytestring_is_definite(item) == false ||
78 cbor_bytestring_length(item) != xy_len) {
79 fido_log_debug("%s: cbor type", __func__);
83 memcpy(xy, cbor_bytestring_handle(item), xy_len);
89 decode_pubkey_point(const cbor_item_t *key, const cbor_item_t *val, void *arg)
93 if (cbor_isa_negint(key) == false ||
94 cbor_int_get_width(key) != CBOR_INT_8)
95 return (0); /* ignore */
97 switch (cbor_get_uint8(key)) {
98 case 1: /* x coordinate */
99 return (decode_coord(val, &k->x, sizeof(k->x)));
102 return (0); /* ignore */
106 eddsa_pk_decode(const cbor_item_t *item, eddsa_pk_t *k)
108 if (cbor_isa_map(item) == false ||
109 cbor_map_is_definite(item) == false ||
110 cbor_map_iter(item, k, decode_pubkey_point) < 0) {
111 fido_log_debug("%s: cbor type", __func__);
121 return (calloc(1, sizeof(eddsa_pk_t)));
125 eddsa_pk_free(eddsa_pk_t **pkp)
129 if (pkp == NULL || (pk = *pkp) == NULL)
132 freezero(pk, sizeof(*pk));
137 eddsa_pk_from_ptr(eddsa_pk_t *pk, const void *ptr, size_t len)
139 if (len < sizeof(*pk))
140 return (FIDO_ERR_INVALID_ARGUMENT);
142 memcpy(pk, ptr, sizeof(*pk));
148 eddsa_pk_to_EVP_PKEY(const eddsa_pk_t *k)
150 EVP_PKEY *pkey = NULL;
152 if ((pkey = EVP_PKEY_new_raw_public_key(EVP_PKEY_ED25519, NULL, k->x,
153 sizeof(k->x))) == NULL)
154 fido_log_debug("%s: EVP_PKEY_new_raw_public_key", __func__);
160 eddsa_pk_from_EVP_PKEY(eddsa_pk_t *pk, const EVP_PKEY *pkey)
164 if (EVP_PKEY_get_raw_public_key(pkey, NULL, &len) != 1 ||
165 len != sizeof(pk->x))
166 return (FIDO_ERR_INTERNAL);
167 if (EVP_PKEY_get_raw_public_key(pkey, pk->x, &len) != 1 ||
168 len != sizeof(pk->x))
169 return (FIDO_ERR_INTERNAL);