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0abae163 RL |
1 | /* |
2 | * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
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 | |
8 | */ | |
9 | ||
10 | #include <openssl/core_names.h> | |
11 | #include <openssl/params.h> | |
969024b4 MC |
12 | #include <openssl/ec.h> |
13 | #include <openssl/err.h> | |
0abae163 RL |
14 | #include "crypto/ecx.h" |
15 | #include "ecx_backend.h" | |
16 | ||
17 | /* | |
18 | * The intention with the "backend" source file is to offer backend support | |
19 | * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider | |
20 | * implementations alike. | |
21 | */ | |
22 | ||
969024b4 MC |
23 | int ecx_public_from_private(ECX_KEY *key) |
24 | { | |
25 | switch (key->type) { | |
26 | case ECX_KEY_TYPE_X25519: | |
27 | X25519_public_from_private(key->pubkey, key->privkey); | |
28 | break; | |
29 | case ECX_KEY_TYPE_ED25519: | |
30 | if (!ED25519_public_from_private(key->libctx, key->pubkey, key->privkey)) { | |
31 | ECerr(0, EC_R_FAILED_MAKING_PUBLIC_KEY); | |
32 | return 0; | |
33 | } | |
34 | break; | |
35 | case ECX_KEY_TYPE_X448: | |
36 | X448_public_from_private(key->pubkey, key->privkey); | |
37 | break; | |
38 | case ECX_KEY_TYPE_ED448: | |
39 | if (!ED448_public_from_private(key->libctx, key->pubkey, key->privkey)) { | |
40 | ECerr(0, EC_R_FAILED_MAKING_PUBLIC_KEY); | |
41 | return 0; | |
42 | } | |
43 | break; | |
44 | } | |
45 | return 1; | |
46 | } | |
47 | ||
0abae163 RL |
48 | int ecx_key_fromdata(ECX_KEY *ecx, const OSSL_PARAM params[], |
49 | int include_private) | |
50 | { | |
969024b4 | 51 | size_t privkeylen = 0, pubkeylen = 0; |
0abae163 RL |
52 | const OSSL_PARAM *param_priv_key = NULL, *param_pub_key; |
53 | unsigned char *pubkey; | |
54 | ||
55 | if (ecx == NULL) | |
56 | return 0; | |
57 | ||
58 | param_pub_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY); | |
59 | if (include_private) | |
60 | param_priv_key = | |
61 | OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY); | |
969024b4 MC |
62 | |
63 | if (param_pub_key == NULL && param_priv_key == NULL) | |
0abae163 RL |
64 | return 0; |
65 | ||
66 | if (param_priv_key != NULL | |
67 | && !OSSL_PARAM_get_octet_string(param_priv_key, | |
68 | (void **)&ecx->privkey, ecx->keylen, | |
69 | &privkeylen)) | |
70 | return 0; | |
71 | ||
72 | pubkey = ecx->pubkey; | |
969024b4 MC |
73 | if (param_pub_key != NULL |
74 | && !OSSL_PARAM_get_octet_string(param_pub_key, | |
75 | (void **)&pubkey, | |
76 | sizeof(ecx->pubkey), &pubkeylen)) | |
0abae163 RL |
77 | return 0; |
78 | ||
969024b4 | 79 | if ((param_pub_key != NULL && pubkeylen != ecx->keylen) |
0abae163 RL |
80 | || (param_priv_key != NULL && privkeylen != ecx->keylen)) |
81 | return 0; | |
82 | ||
969024b4 MC |
83 | if (param_pub_key == NULL && !ecx_public_from_private(ecx)) |
84 | return 0; | |
85 | ||
0abae163 RL |
86 | ecx->haspubkey = 1; |
87 | ||
88 | return 1; | |
89 | } | |
90 |