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 DEFINE_STACK_OF(OSSL_CMP_ITAV)
  22
  23 int FuzzerInitialize(int *argc, char ***argv)
  24 {
  25     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
  26     ERR_clear_error();
  27     CRYPTO_free_ex_index(0, -1);
  28     FuzzerSetRand();
  29     return 1;
  30 }
  31
  32 static int num_responses;
  33
  34 static OSSL_CMP_MSG *transfer_cb(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *req)
  35 {
  36     if (num_responses++ > 2)
  37         return NULL; /* prevent loops due to repeated pollRep */
  38     return OSSL_CMP_MSG_dup((OSSL_CMP_MSG *)
  39                             OSSL_CMP_CTX_get_transfer_cb_arg(ctx));
  40 }
  41
  42 static int print_noop(const char *func, const char *file, int line,
  43                       OSSL_CMP_severity level, const char *msg)
  44 {
  45     return 1;
  46 }
  47
  48 static int allow_unprotected(const OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *rep,
  49                              int invalid_protection, int expected_type)
  50 {
  51     return 1;
  52 }
  53
  54 static void cmp_client_process_response(OSSL_CMP_CTX *ctx, OSSL_CMP_MSG *msg)
  55 {
  56     X509_NAME *name = X509_NAME_new();
  57     ASN1_INTEGER *serial = ASN1_INTEGER_new();
  58
  59     ctx->unprotectedSend = 1; /* satisfy ossl_cmp_msg_protect() */
  60     ctx->disableConfirm = 1; /* check just one response message */
  61     ctx->popoMethod = OSSL_CRMF_POPO_NONE; /* satisfy ossl_cmp_certReq_new() */
  62     ctx->oldCert = X509_new(); /* satisfy crm_new() and ossl_cmp_rr_new() */
  63     if (!OSSL_CMP_CTX_set1_secretValue(ctx, (unsigned char *)"",
  64                                        0) /* prevent too unspecific error */
  65             || ctx->oldCert == NULL
  66             || name == NULL || !X509_set_issuer_name(ctx->oldCert, name)
  67             || serial == NULL || !X509_set_serialNumber(ctx->oldCert, serial))
  68         goto err;
  69
  70     (void)OSSL_CMP_CTX_set_transfer_cb(ctx, transfer_cb);
  71     (void)OSSL_CMP_CTX_set_transfer_cb_arg(ctx, msg);
  72     (void)OSSL_CMP_CTX_set_log_cb(ctx, print_noop);
  73     num_responses = 0;
  74     switch (msg->body != NULL ? msg->body->type : -1) {
  75     case OSSL_CMP_PKIBODY_IP:
  76         (void)OSSL_CMP_exec_IR_ses(ctx);
  77         break;
  78     case OSSL_CMP_PKIBODY_CP:
  79         (void)OSSL_CMP_exec_CR_ses(ctx);
  80         (void)OSSL_CMP_exec_P10CR_ses(ctx);
  81         break;
  82     case OSSL_CMP_PKIBODY_KUP:
  83         (void)OSSL_CMP_exec_KUR_ses(ctx);
  84         break;
  85     case OSSL_CMP_PKIBODY_POLLREP:
  86         ctx->status = OSSL_CMP_PKISTATUS_waiting;
  87         (void)OSSL_CMP_try_certreq(ctx, OSSL_CMP_PKIBODY_CR, NULL);
  88         break;
  89     case OSSL_CMP_PKIBODY_RP:
  90         (void)OSSL_CMP_exec_RR_ses(ctx);
  91         break;
  92     case OSSL_CMP_PKIBODY_GENP:
  93         sk_OSSL_CMP_ITAV_pop_free(OSSL_CMP_exec_GENM_ses(ctx),
  94                                   OSSL_CMP_ITAV_free);
  95         break;
  96     default:
  97         (void)ossl_cmp_msg_check_received(ctx, msg, allow_unprotected, 0);
  98         break;
  99     }
 100  err:
 101     X509_NAME_free(name);
 102     ASN1_INTEGER_free(serial);
 103 }
 104
 105 static OSSL_CMP_PKISI *process_cert_request(OSSL_CMP_SRV_CTX *srv_ctx,
 106                                             const OSSL_CMP_MSG *cert_req,
 107                                             int certReqId,
 108                                             const OSSL_CRMF_MSG *crm,
 109                                             const X509_REQ *p10cr,
 110                                             X509 **certOut,
 111                                             STACK_OF(X509) **chainOut,
 112                                             STACK_OF(X509) **caPubs)
 113 {
 114     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 115     return NULL;
 116 }
 117
 118 static OSSL_CMP_PKISI *process_rr(OSSL_CMP_SRV_CTX *srv_ctx,
 119                                   const OSSL_CMP_MSG *rr,
 120                                   const X509_NAME *issuer,
 121                                   const ASN1_INTEGER *serial)
 122 {
 123     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 124     return NULL;
 125 }
 126
 127 static int process_genm(OSSL_CMP_SRV_CTX *srv_ctx,
 128                         const OSSL_CMP_MSG *genm,
 129                         const STACK_OF(OSSL_CMP_ITAV) *in,
 130                         STACK_OF(OSSL_CMP_ITAV) **out)
 131 {
 132     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 133     return 0;
 134 }
 135
 136 static void process_error(OSSL_CMP_SRV_CTX *srv_ctx, const OSSL_CMP_MSG *error,
 137                           const OSSL_CMP_PKISI *statusInfo,
 138                           const ASN1_INTEGER *errorCode,
 139                           const OSSL_CMP_PKIFREETEXT *errorDetails)
 140 {
 141     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 142 }
 143
 144 static int process_certConf(OSSL_CMP_SRV_CTX *srv_ctx,
 145                             const OSSL_CMP_MSG *certConf, int certReqId,
 146                             const ASN1_OCTET_STRING *certHash,
 147                             const OSSL_CMP_PKISI *si)
 148 {
 149     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 150     return 0;
 151 }
 152
 153 static int process_pollReq(OSSL_CMP_SRV_CTX *srv_ctx,
 154                            const OSSL_CMP_MSG *pollReq, int certReqId,
 155                            OSSL_CMP_MSG **certReq, int64_t *check_after)
 156 {
 157     CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
 158     return 0;
 159 }
 160
 161 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
 162 {
 163     OSSL_CMP_MSG *msg;
 164     BIO *in;
 165
 166     if (len == 0)
 167         return 0;
 168
 169     in = BIO_new(BIO_s_mem());
 170     OPENSSL_assert((size_t)BIO_write(in, buf, len) == len);
 171     msg = d2i_OSSL_CMP_MSG_bio(in, NULL);
 172     if (msg != NULL) {
 173         BIO *out = BIO_new(BIO_s_null());
 174         OSSL_CMP_SRV_CTX *srv_ctx = OSSL_CMP_SRV_CTX_new();
 175         OSSL_CMP_CTX *client_ctx = OSSL_CMP_CTX_new();
 176
 177         i2d_OSSL_CMP_MSG_bio(out, msg);
 178         ASN1_item_print(out, (ASN1_VALUE *)msg, 4,
 179                         ASN1_ITEM_rptr(OSSL_CMP_MSG), NULL);
 180         BIO_free(out);
 181
 182         if (client_ctx != NULL)
 183             cmp_client_process_response(client_ctx, msg);
 184         if (srv_ctx != NULL
 185             && OSSL_CMP_CTX_set_log_cb(OSSL_CMP_SRV_CTX_get0_cmp_ctx(srv_ctx),
 186                                        print_noop)
 187             && OSSL_CMP_SRV_CTX_init(srv_ctx, NULL, process_cert_request,
 188                                      process_rr, process_genm, process_error,
 189                                      process_certConf, process_pollReq))
 190             OSSL_CMP_MSG_free(OSSL_CMP_SRV_process_request(srv_ctx, msg));
 191
 192         OSSL_CMP_CTX_free(client_ctx);
 193         OSSL_CMP_SRV_CTX_free(srv_ctx);
 194         OSSL_CMP_MSG_free(msg);
 195     }
 196
 197     BIO_free(in);
 198     ERR_clear_error();
 199
 200     return 0;
 201 }
 202
 203 void FuzzerCleanup(void)
 204 {
 205 }