[331] | 1 | /*
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| 2 | * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/asn1t.h>
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| 13 | #include <openssl/x509.h>
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| 14 | #include <openssl/engine.h>
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| 15 | #include "internal/asn1_int.h"
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| 16 | #include "internal/evp_int.h"
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| 17 |
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| 18 | /* Keep this sorted in type order !! */
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| 19 | static const EVP_PKEY_ASN1_METHOD *standard_methods[] = {
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| 20 | #ifndef OPENSSL_NO_RSA
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| 21 | &rsa_asn1_meths[0],
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| 22 | &rsa_asn1_meths[1],
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| 23 | #endif
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| 24 | #ifndef OPENSSL_NO_DH
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| 25 | &dh_asn1_meth,
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| 26 | #endif
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| 27 | #ifndef OPENSSL_NO_DSA
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| 28 | &dsa_asn1_meths[0],
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| 29 | &dsa_asn1_meths[1],
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| 30 | &dsa_asn1_meths[2],
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| 31 | &dsa_asn1_meths[3],
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| 32 | &dsa_asn1_meths[4],
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| 33 | #endif
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| 34 | #ifndef OPENSSL_NO_EC
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| 35 | &eckey_asn1_meth,
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| 36 | #endif
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| 37 | &hmac_asn1_meth,
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| 38 | #ifndef OPENSSL_NO_CMAC
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| 39 | &cmac_asn1_meth,
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| 40 | #endif
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| 41 | #ifndef OPENSSL_NO_DH
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| 42 | &dhx_asn1_meth,
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| 43 | #endif
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| 44 | #ifndef OPENSSL_NO_EC
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| 45 | &ecx25519_asn1_meth
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| 46 | #endif
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| 47 | };
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| 48 |
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| 49 | typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
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| 50 | static STACK_OF(EVP_PKEY_ASN1_METHOD) *app_methods = NULL;
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| 51 |
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| 52 | #ifdef TEST
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| 53 | void main()
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| 54 | {
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| 55 | int i;
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| 56 | for (i = 0; i < OSSL_NELEM(standard_methods); i++)
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| 57 | fprintf(stderr, "Number %d id=%d (%s)\n", i,
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| 58 | standard_methods[i]->pkey_id,
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| 59 | OBJ_nid2sn(standard_methods[i]->pkey_id));
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| 60 | }
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| 61 | #endif
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| 62 |
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| 63 | DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
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| 64 | const EVP_PKEY_ASN1_METHOD *, ameth);
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| 65 |
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| 66 | static int ameth_cmp(const EVP_PKEY_ASN1_METHOD *const *a,
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| 67 | const EVP_PKEY_ASN1_METHOD *const *b)
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| 68 | {
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| 69 | return ((*a)->pkey_id - (*b)->pkey_id);
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| 70 | }
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| 71 |
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| 72 | IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
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| 73 | const EVP_PKEY_ASN1_METHOD *, ameth);
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| 74 |
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| 75 | int EVP_PKEY_asn1_get_count(void)
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| 76 | {
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| 77 | int num = OSSL_NELEM(standard_methods);
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| 78 | if (app_methods)
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| 79 | num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods);
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| 80 | return num;
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| 81 | }
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| 82 |
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| 83 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx)
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| 84 | {
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| 85 | int num = OSSL_NELEM(standard_methods);
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| 86 | if (idx < 0)
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| 87 | return NULL;
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| 88 | if (idx < num)
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| 89 | return standard_methods[idx];
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| 90 | idx -= num;
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| 91 | return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
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| 92 | }
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| 93 |
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| 94 | static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type)
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| 95 | {
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| 96 | EVP_PKEY_ASN1_METHOD tmp;
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| 97 | const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret;
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| 98 | tmp.pkey_id = type;
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| 99 | if (app_methods) {
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| 100 | int idx;
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| 101 | idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp);
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| 102 | if (idx >= 0)
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| 103 | return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
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| 104 | }
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| 105 | ret = OBJ_bsearch_ameth(&t, standard_methods, OSSL_NELEM(standard_methods));
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| 106 | if (!ret || !*ret)
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| 107 | return NULL;
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| 108 | return *ret;
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| 109 | }
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| 110 |
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| 111 | /*
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| 112 | * Find an implementation of an ASN1 algorithm. If 'pe' is not NULL also
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| 113 | * search through engines and set *pe to a functional reference to the engine
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| 114 | * implementing 'type' or NULL if no engine implements it.
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| 115 | */
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| 116 |
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| 117 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type)
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| 118 | {
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| 119 | const EVP_PKEY_ASN1_METHOD *t;
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| 120 |
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| 121 | for (;;) {
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| 122 | t = pkey_asn1_find(type);
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| 123 | if (!t || !(t->pkey_flags & ASN1_PKEY_ALIAS))
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| 124 | break;
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| 125 | type = t->pkey_base_id;
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| 126 | }
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| 127 | if (pe) {
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| 128 | #ifndef OPENSSL_NO_ENGINE
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| 129 | ENGINE *e;
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| 130 | /* type will contain the final unaliased type */
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| 131 | e = ENGINE_get_pkey_asn1_meth_engine(type);
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| 132 | if (e) {
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| 133 | *pe = e;
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| 134 | return ENGINE_get_pkey_asn1_meth(e, type);
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| 135 | }
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| 136 | #endif
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| 137 | *pe = NULL;
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| 138 | }
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| 139 | return t;
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| 140 | }
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| 141 |
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| 142 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
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| 143 | const char *str, int len)
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| 144 | {
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| 145 | int i;
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| 146 | const EVP_PKEY_ASN1_METHOD *ameth;
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| 147 | if (len == -1)
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| 148 | len = strlen(str);
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| 149 | if (pe) {
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| 150 | #ifndef OPENSSL_NO_ENGINE
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| 151 | ENGINE *e;
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| 152 | ameth = ENGINE_pkey_asn1_find_str(&e, str, len);
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| 153 | if (ameth) {
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| 154 | /*
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| 155 | * Convert structural into functional reference
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| 156 | */
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| 157 | if (!ENGINE_init(e))
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| 158 | ameth = NULL;
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| 159 | ENGINE_free(e);
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| 160 | *pe = e;
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| 161 | return ameth;
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| 162 | }
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| 163 | #endif
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| 164 | *pe = NULL;
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| 165 | }
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| 166 | for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
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| 167 | ameth = EVP_PKEY_asn1_get0(i);
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| 168 | if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
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| 169 | continue;
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| 170 | if (((int)strlen(ameth->pem_str) == len)
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| 171 | && (strncasecmp(ameth->pem_str, str, len) == 0))
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| 172 | return ameth;
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| 173 | }
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| 174 | return NULL;
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| 175 | }
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| 176 |
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| 177 | int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth)
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| 178 | {
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| 179 | if (app_methods == NULL) {
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| 180 | app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
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| 181 | if (app_methods == NULL)
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| 182 | return 0;
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| 183 | }
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| 184 | if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth))
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| 185 | return 0;
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| 186 | sk_EVP_PKEY_ASN1_METHOD_sort(app_methods);
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| 187 | return 1;
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| 188 | }
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| 189 |
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| 190 | int EVP_PKEY_asn1_add_alias(int to, int from)
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| 191 | {
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| 192 | EVP_PKEY_ASN1_METHOD *ameth;
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| 193 | ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL);
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| 194 | if (ameth == NULL)
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| 195 | return 0;
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| 196 | ameth->pkey_base_id = to;
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| 197 | if (!EVP_PKEY_asn1_add0(ameth)) {
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| 198 | EVP_PKEY_asn1_free(ameth);
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| 199 | return 0;
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| 200 | }
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| 201 | return 1;
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| 202 | }
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| 203 |
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| 204 | int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id,
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| 205 | int *ppkey_flags, const char **pinfo,
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| 206 | const char **ppem_str,
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| 207 | const EVP_PKEY_ASN1_METHOD *ameth)
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| 208 | {
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| 209 | if (!ameth)
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| 210 | return 0;
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| 211 | if (ppkey_id)
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| 212 | *ppkey_id = ameth->pkey_id;
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| 213 | if (ppkey_base_id)
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| 214 | *ppkey_base_id = ameth->pkey_base_id;
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| 215 | if (ppkey_flags)
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| 216 | *ppkey_flags = ameth->pkey_flags;
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| 217 | if (pinfo)
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| 218 | *pinfo = ameth->info;
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| 219 | if (ppem_str)
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| 220 | *ppem_str = ameth->pem_str;
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| 221 | return 1;
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| 222 | }
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| 223 |
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| 224 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(const EVP_PKEY *pkey)
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| 225 | {
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| 226 | return pkey->ameth;
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| 227 | }
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| 228 |
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| 229 | EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
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| 230 | const char *pem_str, const char *info)
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| 231 | {
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| 232 | EVP_PKEY_ASN1_METHOD *ameth = OPENSSL_zalloc(sizeof(*ameth));
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| 233 |
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| 234 | if (ameth == NULL)
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| 235 | return NULL;
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| 236 |
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| 237 | ameth->pkey_id = id;
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| 238 | ameth->pkey_base_id = id;
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| 239 | ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC;
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| 240 |
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| 241 | if (info) {
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| 242 | ameth->info = OPENSSL_strdup(info);
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| 243 | if (!ameth->info)
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| 244 | goto err;
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| 245 | }
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| 246 |
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| 247 | if (pem_str) {
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| 248 | ameth->pem_str = OPENSSL_strdup(pem_str);
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| 249 | if (!ameth->pem_str)
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| 250 | goto err;
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| 251 | }
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| 252 |
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| 253 | return ameth;
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| 254 |
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| 255 | err:
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| 256 | EVP_PKEY_asn1_free(ameth);
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| 257 | return NULL;
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| 258 |
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| 259 | }
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| 260 |
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| 261 | void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
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| 262 | const EVP_PKEY_ASN1_METHOD *src)
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| 263 | {
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| 264 |
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| 265 | dst->pub_decode = src->pub_decode;
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| 266 | dst->pub_encode = src->pub_encode;
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| 267 | dst->pub_cmp = src->pub_cmp;
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| 268 | dst->pub_print = src->pub_print;
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| 269 |
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| 270 | dst->priv_decode = src->priv_decode;
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| 271 | dst->priv_encode = src->priv_encode;
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| 272 | dst->priv_print = src->priv_print;
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| 273 |
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| 274 | dst->old_priv_encode = src->old_priv_encode;
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| 275 | dst->old_priv_decode = src->old_priv_decode;
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| 276 |
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| 277 | dst->pkey_size = src->pkey_size;
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| 278 | dst->pkey_bits = src->pkey_bits;
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| 279 |
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| 280 | dst->param_decode = src->param_decode;
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| 281 | dst->param_encode = src->param_encode;
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| 282 | dst->param_missing = src->param_missing;
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| 283 | dst->param_copy = src->param_copy;
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| 284 | dst->param_cmp = src->param_cmp;
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| 285 | dst->param_print = src->param_print;
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| 286 |
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| 287 | dst->pkey_free = src->pkey_free;
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| 288 | dst->pkey_ctrl = src->pkey_ctrl;
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| 289 |
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| 290 | dst->item_sign = src->item_sign;
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| 291 | dst->item_verify = src->item_verify;
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| 292 |
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| 293 | }
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| 294 |
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| 295 | void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth)
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| 296 | {
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| 297 | if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC)) {
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| 298 | OPENSSL_free(ameth->pem_str);
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| 299 | OPENSSL_free(ameth->info);
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| 300 | OPENSSL_free(ameth);
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| 301 | }
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| 302 | }
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| 303 |
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| 304 | void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
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| 305 | int (*pub_decode) (EVP_PKEY *pk,
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| 306 | X509_PUBKEY *pub),
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| 307 | int (*pub_encode) (X509_PUBKEY *pub,
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| 308 | const EVP_PKEY *pk),
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| 309 | int (*pub_cmp) (const EVP_PKEY *a,
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| 310 | const EVP_PKEY *b),
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| 311 | int (*pub_print) (BIO *out,
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| 312 | const EVP_PKEY *pkey,
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| 313 | int indent, ASN1_PCTX *pctx),
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| 314 | int (*pkey_size) (const EVP_PKEY *pk),
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| 315 | int (*pkey_bits) (const EVP_PKEY *pk))
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| 316 | {
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| 317 | ameth->pub_decode = pub_decode;
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| 318 | ameth->pub_encode = pub_encode;
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| 319 | ameth->pub_cmp = pub_cmp;
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| 320 | ameth->pub_print = pub_print;
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| 321 | ameth->pkey_size = pkey_size;
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| 322 | ameth->pkey_bits = pkey_bits;
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| 323 | }
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| 324 |
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| 325 | void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
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| 326 | int (*priv_decode) (EVP_PKEY *pk,
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| 327 | const PKCS8_PRIV_KEY_INFO
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| 328 | *p8inf),
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| 329 | int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
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| 330 | const EVP_PKEY *pk),
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| 331 | int (*priv_print) (BIO *out,
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| 332 | const EVP_PKEY *pkey,
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| 333 | int indent,
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| 334 | ASN1_PCTX *pctx))
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| 335 | {
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| 336 | ameth->priv_decode = priv_decode;
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| 337 | ameth->priv_encode = priv_encode;
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| 338 | ameth->priv_print = priv_print;
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| 339 | }
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| 340 |
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| 341 | void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
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| 342 | int (*param_decode) (EVP_PKEY *pkey,
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| 343 | const unsigned char **pder,
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| 344 | int derlen),
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| 345 | int (*param_encode) (const EVP_PKEY *pkey,
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| 346 | unsigned char **pder),
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| 347 | int (*param_missing) (const EVP_PKEY *pk),
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| 348 | int (*param_copy) (EVP_PKEY *to,
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| 349 | const EVP_PKEY *from),
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| 350 | int (*param_cmp) (const EVP_PKEY *a,
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| 351 | const EVP_PKEY *b),
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| 352 | int (*param_print) (BIO *out,
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| 353 | const EVP_PKEY *pkey,
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| 354 | int indent, ASN1_PCTX *pctx))
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| 355 | {
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| 356 | ameth->param_decode = param_decode;
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| 357 | ameth->param_encode = param_encode;
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| 358 | ameth->param_missing = param_missing;
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| 359 | ameth->param_copy = param_copy;
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| 360 | ameth->param_cmp = param_cmp;
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| 361 | ameth->param_print = param_print;
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| 362 | }
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| 363 |
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| 364 | void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
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| 365 | void (*pkey_free) (EVP_PKEY *pkey))
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| 366 | {
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| 367 | ameth->pkey_free = pkey_free;
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| 368 | }
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| 369 |
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| 370 | void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
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| 371 | int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
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| 372 | long arg1, void *arg2))
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| 373 | {
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| 374 | ameth->pkey_ctrl = pkey_ctrl;
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| 375 | }
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| 376 |
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| 377 | void EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD *ameth,
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| 378 | int (*pkey_security_bits) (const EVP_PKEY
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| 379 | *pk))
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| 380 | {
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| 381 | ameth->pkey_security_bits = pkey_security_bits;
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| 382 | }
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| 383 |
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| 384 | void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
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| 385 | int (*item_verify) (EVP_MD_CTX *ctx,
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| 386 | const ASN1_ITEM *it,
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| 387 | void *asn,
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| 388 | X509_ALGOR *a,
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| 389 | ASN1_BIT_STRING *sig,
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| 390 | EVP_PKEY *pkey),
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| 391 | int (*item_sign) (EVP_MD_CTX *ctx,
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| 392 | const ASN1_ITEM *it,
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| 393 | void *asn,
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| 394 | X509_ALGOR *alg1,
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| 395 | X509_ALGOR *alg2,
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| 396 | ASN1_BIT_STRING *sig))
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| 397 | {
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| 398 | ameth->item_sign = item_sign;
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| 399 | ameth->item_verify = item_verify;
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| 400 | }
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