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4227e504 | 1 | /* |
da1c088f | 2 | * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. |
4227e504 RL |
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 | ||
6ed4022c RL |
10 | /* |
11 | * Low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
4227e504 RL |
15 | |
16 | #include <stdio.h> | |
17 | #include "internal/cryptlib.h" | |
18 | #include <openssl/evp.h> | |
19 | #include <openssl/encoder.h> | |
20 | #include <openssl/buffer.h> | |
21 | #include <openssl/x509.h> | |
6ed4022c | 22 | #include <openssl/rsa.h> /* For i2d_RSAPublicKey */ |
4227e504 RL |
23 | #include <openssl/dsa.h> /* For i2d_DSAPublicKey */ |
24 | #include <openssl/ec.h> /* For i2o_ECPublicKey */ | |
25 | #include "crypto/asn1.h" | |
26 | #include "crypto/evp.h" | |
27 | ||
8ab9c4dd RL |
28 | struct type_and_structure_st { |
29 | const char *output_type; | |
30 | const char *output_structure; | |
31 | }; | |
32 | ||
4227e504 | 33 | static int i2d_provided(const EVP_PKEY *a, int selection, |
8ab9c4dd | 34 | const struct type_and_structure_st *output_info, |
4227e504 RL |
35 | unsigned char **pp) |
36 | { | |
4227e504 RL |
37 | int ret; |
38 | ||
39 | for (ret = -1; | |
8ab9c4dd RL |
40 | ret == -1 && output_info->output_type != NULL; |
41 | output_info++) { | |
4227e504 RL |
42 | /* |
43 | * The i2d_ calls don't take a boundary length for *pp. However, | |
1d73e2ad RL |
44 | * OSSL_ENCODER_to_data() needs one, so we make one up. Because |
45 | * OSSL_ENCODER_to_data() decrements this number by the amount of | |
46 | * bytes written, we need to calculate the length written further | |
47 | * down, when pp != NULL. | |
4227e504 RL |
48 | */ |
49 | size_t len = INT_MAX; | |
a8457b4c | 50 | int pp_was_NULL = (pp == NULL || *pp == NULL); |
0c6c3782 | 51 | OSSL_ENCODER_CTX *ctx; |
4227e504 | 52 | |
8ab9c4dd RL |
53 | ctx = OSSL_ENCODER_CTX_new_for_pkey(a, selection, |
54 | output_info->output_type, | |
55 | output_info->output_structure, | |
56 | NULL); | |
4227e504 RL |
57 | if (ctx == NULL) |
58 | return -1; | |
1d73e2ad | 59 | if (OSSL_ENCODER_to_data(ctx, pp, &len)) { |
a8457b4c | 60 | if (pp_was_NULL) |
1d73e2ad RL |
61 | ret = (int)len; |
62 | else | |
63 | ret = INT_MAX - (int)len; | |
64 | } | |
4227e504 | 65 | OSSL_ENCODER_CTX_free(ctx); |
4227e504 RL |
66 | } |
67 | ||
68 | if (ret == -1) | |
69 | ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_TYPE); | |
70 | return ret; | |
71 | } | |
72 | ||
73 | int i2d_KeyParams(const EVP_PKEY *a, unsigned char **pp) | |
74 | { | |
75 | if (evp_pkey_is_provided(a)) { | |
8ab9c4dd RL |
76 | static const struct type_and_structure_st output_info[] = { |
77 | { "DER", "type-specific" }, | |
78 | { NULL, } | |
79 | }; | |
4227e504 | 80 | |
8ab9c4dd | 81 | return i2d_provided(a, EVP_PKEY_KEY_PARAMETERS, output_info, pp); |
4227e504 RL |
82 | } |
83 | if (a->ameth != NULL && a->ameth->param_encode != NULL) | |
84 | return a->ameth->param_encode(a, pp); | |
85 | ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_TYPE); | |
86 | return -1; | |
87 | } | |
88 | ||
89 | int i2d_KeyParams_bio(BIO *bp, const EVP_PKEY *pkey) | |
90 | { | |
91 | return ASN1_i2d_bio_of(EVP_PKEY, i2d_KeyParams, bp, pkey); | |
92 | } | |
93 | ||
94 | int i2d_PrivateKey(const EVP_PKEY *a, unsigned char **pp) | |
95 | { | |
96 | if (evp_pkey_is_provided(a)) { | |
8ab9c4dd RL |
97 | static const struct type_and_structure_st output_info[] = { |
98 | { "DER", "type-specific" }, | |
6a2b8ff3 | 99 | { "DER", "PrivateKeyInfo" }, |
8ab9c4dd RL |
100 | { NULL, } |
101 | }; | |
4227e504 | 102 | |
8ab9c4dd | 103 | return i2d_provided(a, EVP_PKEY_KEYPAIR, output_info, pp); |
4227e504 RL |
104 | } |
105 | if (a->ameth != NULL && a->ameth->old_priv_encode != NULL) { | |
106 | return a->ameth->old_priv_encode(a, pp); | |
107 | } | |
108 | if (a->ameth != NULL && a->ameth->priv_encode != NULL) { | |
109 | PKCS8_PRIV_KEY_INFO *p8 = EVP_PKEY2PKCS8(a); | |
110 | int ret = 0; | |
111 | ||
112 | if (p8 != NULL) { | |
113 | ret = i2d_PKCS8_PRIV_KEY_INFO(p8, pp); | |
114 | PKCS8_PRIV_KEY_INFO_free(p8); | |
115 | } | |
116 | return ret; | |
117 | } | |
118 | ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE); | |
119 | return -1; | |
120 | } | |
121 | ||
122 | int i2d_PublicKey(const EVP_PKEY *a, unsigned char **pp) | |
123 | { | |
124 | if (evp_pkey_is_provided(a)) { | |
8ab9c4dd RL |
125 | static const struct type_and_structure_st output_info[] = { |
126 | { "DER", "type-specific" }, | |
127 | { "blob", NULL }, /* for EC */ | |
128 | { NULL, } | |
129 | }; | |
4227e504 | 130 | |
8ab9c4dd | 131 | return i2d_provided(a, EVP_PKEY_PUBLIC_KEY, output_info, pp); |
4227e504 | 132 | } |
8582dccc | 133 | switch (EVP_PKEY_get_base_id(a)) { |
4227e504 RL |
134 | case EVP_PKEY_RSA: |
135 | return i2d_RSAPublicKey(EVP_PKEY_get0_RSA(a), pp); | |
4227e504 RL |
136 | #ifndef OPENSSL_NO_DSA |
137 | case EVP_PKEY_DSA: | |
138 | return i2d_DSAPublicKey(EVP_PKEY_get0_DSA(a), pp); | |
139 | #endif | |
140 | #ifndef OPENSSL_NO_EC | |
141 | case EVP_PKEY_EC: | |
142 | return i2o_ECPublicKey(EVP_PKEY_get0_EC_KEY(a), pp); | |
143 | #endif | |
144 | default: | |
145 | ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE); | |
146 | return -1; | |
147 | } | |
148 | } |