| 1 | /*
|
|---|
| 2 | * Copyright 2023-2024 The OpenSSL Project Authors. All Rights Reserved.
|
|---|
| 3 | *
|
|---|
| 4 | * Licensed under the Apache License 2.0 (the "License");
|
|---|
| 5 | * you may not use this file except in compliance with the License.
|
|---|
| 6 | * You may obtain a copy of the License at
|
|---|
| 7 | * https://www.openssl.org/source/license.html
|
|---|
| 8 | * or in the file LICENSE in the source distribution.
|
|---|
| 9 | */
|
|---|
| 10 |
|
|---|
| 11 | #include <openssl/decoder.h>
|
|---|
| 12 | #include <openssl/err.h>
|
|---|
| 13 | #include <openssl/rand.h>
|
|---|
| 14 | #include "fuzzer.h"
|
|---|
| 15 |
|
|---|
| 16 | static ASN1_PCTX *pctx;
|
|---|
| 17 |
|
|---|
| 18 | int FuzzerInitialize(int *argc, char ***argv)
|
|---|
| 19 | {
|
|---|
| 20 | FuzzerSetRand();
|
|---|
| 21 |
|
|---|
| 22 | OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS
|
|---|
| 23 | | OPENSSL_INIT_ADD_ALL_CIPHERS
|
|---|
| 24 | | OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
|
|---|
| 25 |
|
|---|
| 26 | pctx = ASN1_PCTX_new();
|
|---|
| 27 | ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT
|
|---|
| 28 | | ASN1_PCTX_FLAGS_SHOW_SEQUENCE
|
|---|
| 29 | | ASN1_PCTX_FLAGS_SHOW_SSOF
|
|---|
| 30 | | ASN1_PCTX_FLAGS_SHOW_TYPE
|
|---|
| 31 | | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
|
|---|
| 32 | ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT
|
|---|
| 33 | | ASN1_STRFLGS_SHOW_TYPE
|
|---|
| 34 | | ASN1_STRFLGS_DUMP_ALL);
|
|---|
| 35 |
|
|---|
| 36 | ERR_clear_error();
|
|---|
| 37 | CRYPTO_free_ex_index(0, -1);
|
|---|
| 38 | return 1;
|
|---|
| 39 | }
|
|---|
| 40 |
|
|---|
| 41 | int FuzzerTestOneInput(const uint8_t *buf, size_t len)
|
|---|
| 42 | {
|
|---|
| 43 | OSSL_DECODER_CTX *dctx;
|
|---|
| 44 | EVP_PKEY *pkey = NULL;
|
|---|
| 45 | EVP_PKEY_CTX *ctx = NULL;
|
|---|
| 46 | BIO *bio;
|
|---|
| 47 |
|
|---|
| 48 | bio = BIO_new(BIO_s_null());
|
|---|
| 49 | dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, NULL, NULL, NULL, 0, NULL,
|
|---|
| 50 | NULL);
|
|---|
| 51 | if (dctx == NULL) {
|
|---|
| 52 | return 0;
|
|---|
| 53 | }
|
|---|
| 54 | if (OSSL_DECODER_from_data(dctx, &buf, &len)) {
|
|---|
| 55 | EVP_PKEY *pkey2;
|
|---|
| 56 |
|
|---|
| 57 | EVP_PKEY_print_public(bio, pkey, 1, pctx);
|
|---|
| 58 | EVP_PKEY_print_private(bio, pkey, 1, pctx);
|
|---|
| 59 | EVP_PKEY_print_params(bio, pkey, 1, pctx);
|
|---|
| 60 |
|
|---|
| 61 | pkey2 = EVP_PKEY_dup(pkey);
|
|---|
| 62 | OPENSSL_assert(pkey2 != NULL);
|
|---|
| 63 | EVP_PKEY_eq(pkey, pkey2);
|
|---|
| 64 | EVP_PKEY_free(pkey2);
|
|---|
| 65 |
|
|---|
| 66 | ctx = EVP_PKEY_CTX_new(pkey, NULL);
|
|---|
| 67 | /*
|
|---|
| 68 | * Param check will take too long time on large DH parameters.
|
|---|
| 69 | * Skip it.
|
|---|
| 70 | */
|
|---|
| 71 | if ((!EVP_PKEY_is_a(pkey, "DH") && !EVP_PKEY_is_a(pkey, "DHX"))
|
|---|
| 72 | || EVP_PKEY_get_bits(pkey) <= 2048)
|
|---|
| 73 | EVP_PKEY_param_check(ctx);
|
|---|
| 74 |
|
|---|
| 75 | EVP_PKEY_public_check(ctx);
|
|---|
| 76 | /* Private and pairwise checks are unbounded, skip for large keys. */
|
|---|
| 77 | if (EVP_PKEY_get_bits(pkey) <= 4096) {
|
|---|
| 78 | EVP_PKEY_private_check(ctx);
|
|---|
| 79 | EVP_PKEY_pairwise_check(ctx);
|
|---|
| 80 | }
|
|---|
| 81 | OPENSSL_assert(ctx != NULL);
|
|---|
| 82 | EVP_PKEY_CTX_free(ctx);
|
|---|
| 83 | EVP_PKEY_free(pkey);
|
|---|
| 84 | }
|
|---|
| 85 | OSSL_DECODER_CTX_free(dctx);
|
|---|
| 86 |
|
|---|
| 87 | BIO_free(bio);
|
|---|
| 88 | ERR_clear_error();
|
|---|
| 89 | return 0;
|
|---|
| 90 | }
|
|---|
| 91 |
|
|---|
| 92 | void FuzzerCleanup(void)
|
|---|
| 93 | {
|
|---|
| 94 | ASN1_PCTX_free(pctx);
|
|---|
| 95 | FuzzerClearRand();
|
|---|
| 96 | }
|
|---|
