| 1 | /*
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| 2 | * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (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 | /*
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| 11 | * DSA low level APIs are deprecated for public use, but still ok for
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| 12 | * internal use.
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| 13 | */
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| 14 | #include "internal/deprecated.h"
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| 15 |
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| 16 | #include <stdio.h>
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| 17 | #include "internal/cryptlib.h"
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| 18 | #include <openssl/bn.h>
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| 19 | #include <openssl/evp.h>
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| 20 | #include <openssl/objects.h>
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| 21 | #include <openssl/asn1.h>
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| 22 | #include <openssl/rsa.h>
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| 23 | #include <openssl/dsa.h>
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| 24 | #include <openssl/ec.h>
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| 25 |
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| 26 | #include "crypto/evp.h"
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| 27 |
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| 28 | EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
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| 29 | long length)
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| 30 | {
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| 31 | EVP_PKEY *ret;
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| 32 | EVP_PKEY *copy = NULL;
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| 33 |
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| 34 | if ((a == NULL) || (*a == NULL)) {
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| 35 | if ((ret = EVP_PKEY_new()) == NULL) {
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| 36 | ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
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| 37 | return NULL;
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| 38 | }
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| 39 | } else {
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| 40 | ret = *a;
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| 41 |
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| 42 | #ifndef OPENSSL_NO_EC
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| 43 | if (evp_pkey_is_provided(ret)
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| 44 | && EVP_PKEY_get_base_id(ret) == EVP_PKEY_EC) {
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| 45 | if (!evp_pkey_copy_downgraded(©, ret))
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| 46 | goto err;
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| 47 | }
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| 48 | #endif
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| 49 | }
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| 50 |
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| 51 | if ((type != EVP_PKEY_get_id(ret) || copy != NULL)
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| 52 | && !EVP_PKEY_set_type(ret, type)) {
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| 53 | ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
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| 54 | goto err;
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| 55 | }
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| 56 |
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| 57 | switch (EVP_PKEY_get_base_id(ret)) {
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| 58 | case EVP_PKEY_RSA:
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| 59 | if ((ret->pkey.rsa = d2i_RSAPublicKey(NULL, pp, length)) == NULL) {
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| 60 | ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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| 61 | goto err;
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| 62 | }
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| 63 | break;
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| 64 | #ifndef OPENSSL_NO_DSA
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| 65 | case EVP_PKEY_DSA:
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| 66 | if (!d2i_DSAPublicKey(&ret->pkey.dsa, pp, length)) {
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| 67 | ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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| 68 | goto err;
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| 69 | }
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| 70 | break;
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| 71 | #endif
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| 72 | #ifndef OPENSSL_NO_EC
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| 73 | case EVP_PKEY_EC:
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| 74 | if (copy != NULL) {
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| 75 | /* use downgraded parameters from copy */
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| 76 | ret->pkey.ec = copy->pkey.ec;
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| 77 | copy->pkey.ec = NULL;
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| 78 | }
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| 79 | if (!o2i_ECPublicKey(&ret->pkey.ec, pp, length)) {
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| 80 | ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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| 81 | goto err;
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| 82 | }
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| 83 | break;
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| 84 | #endif
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| 85 | default:
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| 86 | ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
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| 87 | goto err;
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| 88 | }
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| 89 | if (a != NULL)
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| 90 | (*a) = ret;
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| 91 | EVP_PKEY_free(copy);
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| 92 | return ret;
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| 93 | err:
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| 94 | if (a == NULL || *a != ret)
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| 95 | EVP_PKEY_free(ret);
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| 96 | EVP_PKEY_free(copy);
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| 97 | return NULL;
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| 98 | }
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