fuzz/cmp.c

   1 /*
   2  * Copyright 2007-2020 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 /*
  11  * Test CMP DER parsing.
  12  */
  13
  14 #include <openssl/bio.h>
  15 #include <openssl/cmp.h>
  16 #include "../crypto/cmp/cmp_local.h"
  17 #include <openssl/err.h>
  18 #include "fuzzer.h"
  19 #include "rand.inc"
  20
  21 int FuzzerInitialize(int *argc, char ***argv)
  22 {
  23     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
  24     ERR_clear_error();
  25     CRYPTO_free_ex_index(0, -1);
  26     FuzzerSetRand();
  27     return 1;
  28 }
  29
  30 static int num_responses;
  31
  32 static OSSL_CMP_MSG *transfer_cb(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *req)
  33 {
  34     if (num_responses++ > 2)
  35         return NULL; /* prevent loops due to repeated pollRep */
  36     return OSSL_CMP_MSG_dup((OSSL_CMP_MSG *)
  37                             OSSL_CMP_CTX_get_transfer_cb_arg(ctx));
  38 }
  39
  40 static int print_noop(const char *func, const char *file, int line,
  41                       OSSL_CMP_severity level, const char *msg)
  42 {
  43     return 1;
  44 }
  45
  46 static int allow_unprotected(const OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *rep,
  47                              int invalid_protection, int expected_type)
  48 {
  49     return 1;
  50 }
  51
  52 static void cmp_client_process_response(OSSL_CMP_CTX *ctx, OSSL_CMP_MSG *msg)
  53 {
  54     X509_NAME *name = X509_NAME_new();
  55     ASN1_INTEGER *serial = ASN1_INTEGER_new();
  56
  57     ctx->unprotectedSend = 1; /* satisfy ossl_cmp_msg_protect() */
  58     ctx->disableConfirm = 1; /* check just one response message */
  59     ctx->popoMethod = OSSL_CRMF_POPO_NONE; /* satisfy ossl_cmp_certReq_new() */
  60     ctx->oldCert = X509_new(); /* satisfy crm_new() and ossl_cmp_rr_new() */
  61     if (!OSSL_CMP_CTX_set1_secretValue(ctx, (unsigned char *)"",
  62                                        0) /* prevent too unspecific error */
  63             || ctx->oldCert == NULL
  64             || name == NULL || !X509_set_issuer_name(ctx->oldCert, name)
  65             || serial == NULL || !X509_set_serialNumber(ctx->oldCert, serial))
  66         goto err;
  67
  68     (void)OSSL_CMP_CTX_set_transfer_cb(ctx, transfer_cb);
  69     (void)OSSL_CMP_CTX_set_transfer_cb_arg(ctx, msg);
  70     (void)OSSL_CMP_CTX_set_log_cb(ctx, print_noop);
  71     num_responses = 0;
  72     switch (msg->body != NULL ? msg->body->type : -1) {
  73     case OSSL_CMP_PKIBODY_IP:
  74         (void)OSSL_CMP_exec_IR_ses(ctx);
  75         break;
  76     case OSSL_CMP_PKIBODY_CP:
  77         (void)OSSL_CMP_exec_CR_ses(ctx);
  78         (void)OSSL_CMP_exec_P10CR_ses(ctx);
  79         break;
  80     case OSSL_CMP_PKIBODY_KUP:
  81         (void)OSSL_CMP_exec_KUR_ses(ctx);
  82         break;
  83     case OSSL_CMP_PKIBODY_POLLREP:
  84         ctx->status = OSSL_CMP_PKISTATUS_waiting;
  85         (void)OSSL_CMP_try_certreq(ctx, OSSL_CMP_PKIBODY_CR, NULL);
  86         break;
  87     case OSSL_CMP_PKIBODY_RP:
  88         (void)OSSL_CMP_exec_RR_ses(ctx);
  89         break;
  90     case OSSL_CMP_PKIBODY_GENP:
  91         sk_OSSL_CMP_ITAV_pop_free(OSSL_CMP_exec_GENM_ses(ctx),
  92                                   OSSL_CMP_ITAV_free);
  93         break;
  94     default:
  95         (void)ossl_cmp_msg_check_received(ctx, msg, allow_unprotected, 0);
  96         break;
  97     }
  98  err:
  99     X509_NAME_free(name);
 100     ASN1_INTEGER_free(serial);
 101 }
 102
 103 static OSSL_CMP_PKISI *process_cert_request(OSSL_CMP_SRV_CTX *srv_ctx,
 104                                             const OSSL_CMP_MSG *cert_req,
 105                                             int certReqId,
 106                                             const OSSL_CRMF_MSG *crm,
 107                                             const X509_REQ *p10cr,
 108                                             X509 **certOut,
 109                                             STACK_OF(X509) **chainOut,
 110                                             STACK_OF(X509) **caPubs)
 111 {
 112     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 113     return NULL;
 114 }
 115
 116 static OSSL_CMP_PKISI *process_rr(OSSL_CMP_SRV_CTX *srv_ctx,
 117                                   const OSSL_CMP_MSG *rr,
 118                                   const X509_NAME *issuer,
 119                                   const ASN1_INTEGER *serial)
 120 {
 121     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 122     return NULL;
 123 }
 124
 125 static int process_genm(OSSL_CMP_SRV_CTX *srv_ctx,
 126                         const OSSL_CMP_MSG *genm,
 127                         const STACK_OF(OSSL_CMP_ITAV) *in,
 128                         STACK_OF(OSSL_CMP_ITAV) **out)
 129 {
 130     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 131     return 0;
 132 }
 133
 134 static void process_error(OSSL_CMP_SRV_CTX *srv_ctx, const OSSL_CMP_MSG *error,
 135                           const OSSL_CMP_PKISI *statusInfo,
 136                           const ASN1_INTEGER *errorCode,
 137                           const OSSL_CMP_PKIFREETEXT *errorDetails)
 138 {
 139     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 140 }
 141
 142 static int process_certConf(OSSL_CMP_SRV_CTX *srv_ctx,
 143                             const OSSL_CMP_MSG *certConf, int certReqId,
 144                             const ASN1_OCTET_STRING *certHash,
 145                             const OSSL_CMP_PKISI *si)
 146 {
 147     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 148     return 0;
 149 }
 150
 151 static int process_pollReq(OSSL_CMP_SRV_CTX *srv_ctx,
 152                            const OSSL_CMP_MSG *pollReq, int certReqId,
 153                            OSSL_CMP_MSG **certReq, int64_t *check_after)
 154 {
 155     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 156     return 0;
 157 }
 158
 159 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
 160 {
 161     OSSL_CMP_MSG *msg;
 162     BIO *in;
 163
 164     if (len == 0)
 165         return 0;
 166
 167     in = BIO_new(BIO_s_mem());
 168     OPENSSL_assert((size_t)BIO_write(in, buf, len) == len);
 169     msg = d2i_OSSL_CMP_MSG_bio(in, NULL);
 170     if (msg != NULL) {
 171         BIO *out = BIO_new(BIO_s_null());
 172         OSSL_CMP_SRV_CTX *srv_ctx = OSSL_CMP_SRV_CTX_new();
 173         OSSL_CMP_CTX *client_ctx = OSSL_CMP_CTX_new();
 174
 175         i2d_OSSL_CMP_MSG_bio(out, msg);
 176         ASN1_item_print(out, (ASN1_VALUE *)msg, 4,
 177                         ASN1_ITEM_rptr(OSSL_CMP_MSG), NULL);
 178         BIO_free(out);
 179
 180         if (client_ctx != NULL)
 181             cmp_client_process_response(client_ctx, msg);
 182         if (srv_ctx != NULL
 183             && OSSL_CMP_CTX_set_log_cb(OSSL_CMP_SRV_CTX_get0_cmp_ctx(srv_ctx),
 184                                        print_noop)
 185             && OSSL_CMP_SRV_CTX_init(srv_ctx, NULL, process_cert_request,
 186                                      process_rr, process_genm, process_error,
 187                                      process_certConf, process_pollReq))
 188             OSSL_CMP_MSG_free(OSSL_CMP_SRV_process_request(srv_ctx, msg));
 189
 190         OSSL_CMP_CTX_free(client_ctx);
 191         OSSL_CMP_SRV_CTX_free(srv_ctx);
 192         OSSL_CMP_MSG_free(msg);
 193     }
 194
 195     BIO_free(in);
 196     ERR_clear_error();
 197
 198     return 0;
 199 }
 200
 201 void FuzzerCleanup(void)
 202 {
 203 }