crypto/self_test_core.c

   1 /*
   2  * Copyright 2019-2020 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 #include <openssl/self_test.h>
  11 #include <openssl/core_names.h>
  12 #include <openssl/params.h>
  13 #include "internal/cryptlib.h"
  14
  15 typedef struct self_test_cb_st
  16 {
  17     OSSL_CALLBACK *cb;
  18     void *cbarg;
  19 } SELF_TEST_CB;
  20
  21 struct ossl_self_test_st
  22 {
  23     /* local state variables */
  24     const char *phase;
  25     const char *type;
  26     const char *desc;
  27     OSSL_CALLBACK *cb;
  28
  29     /* callback related variables used to pass the state back to the user */
  30     OSSL_PARAM params[4];
  31     void *cb_arg;
  32 };
  33
  34 static void *self_test_set_callback_new(OPENSSL_CTX *ctx)
  35 {
  36     SELF_TEST_CB *stcb;
  37
  38     stcb = OPENSSL_zalloc(sizeof(*stcb));
  39     return stcb;
  40 }
  41
  42 static void self_test_set_callback_free(void *stcb)
  43 {
  44     OPENSSL_free(stcb);
  45 }
  46
  47 static const OPENSSL_CTX_METHOD self_test_set_callback_method = {
  48     self_test_set_callback_new,
  49     self_test_set_callback_free,
  50 };
  51
  52 static SELF_TEST_CB *get_self_test_callback(OPENSSL_CTX *libctx)
  53 {
  54     return openssl_ctx_get_data(libctx, OPENSSL_CTX_SELF_TEST_CB_INDEX,
  55                                 &self_test_set_callback_method);
  56 }
  57
  58 #ifndef FIPS_MODE
  59 void OSSL_SELF_TEST_set_callback(OPENSSL_CTX *libctx, OSSL_CALLBACK *cb,
  60                                  void *cbarg)
  61 {
  62     SELF_TEST_CB *stcb = get_self_test_callback(libctx);
  63
  64     if (stcb != NULL) {
  65         stcb->cb = cb;
  66         stcb->cbarg = cbarg;
  67     }
  68 }
  69 #endif /* FIPS_MODE */
  70
  71 void OSSL_SELF_TEST_get_callback(OPENSSL_CTX *libctx, OSSL_CALLBACK **cb,
  72                                  void **cbarg)
  73 {
  74     SELF_TEST_CB *stcb = get_self_test_callback(libctx);
  75
  76     if (cb != NULL)
  77         *cb = (stcb != NULL ? stcb->cb : NULL);
  78     if (cbarg != NULL)
  79         *cbarg = (stcb != NULL ? stcb->cbarg : NULL);
  80 }
  81
  82 static void self_test_setparams(OSSL_SELF_TEST *st)
  83 {
  84     size_t n = 0;
  85
  86     if (st->cb != NULL) {
  87         st->params[n++] =
  88             OSSL_PARAM_construct_utf8_string(OSSL_PROV_PARAM_SELF_TEST_PHASE,
  89                                              (char *)st->phase, 0);
  90         st->params[n++] =
  91             OSSL_PARAM_construct_utf8_string(OSSL_PROV_PARAM_SELF_TEST_TYPE,
  92                                              (char *)st->type, 0);
  93         st->params[n++] =
  94             OSSL_PARAM_construct_utf8_string(OSSL_PROV_PARAM_SELF_TEST_DESC,
  95                                              (char *)st->desc, 0);
  96     }
  97     st->params[n++] = OSSL_PARAM_construct_end();
  98 }
  99
 100 OSSL_SELF_TEST *OSSL_SELF_TEST_new(OSSL_CALLBACK *cb, void *cbarg)
 101 {
 102     OSSL_SELF_TEST *ret = OPENSSL_zalloc(sizeof(*ret));
 103
 104     if (ret == NULL)
 105         return NULL;
 106
 107     ret->cb = cb;
 108     ret->cb_arg = cbarg;
 109     ret->phase = "";
 110     ret->type = "";
 111     ret->desc = "";
 112     self_test_setparams(ret);
 113     return ret;
 114 }
 115
 116 void OSSL_SELF_TEST_free(OSSL_SELF_TEST *st)
 117 {
 118     OPENSSL_free(st);
 119 }
 120
 121 /* Can be used during application testing to log that a test has started. */
 122 void OSSL_SELF_TEST_onbegin(OSSL_SELF_TEST *st, const char *type,
 123                             const char *desc)
 124 {
 125     if (st != NULL && st->cb != NULL) {
 126         st->phase = OSSL_SELF_TEST_PHASE_START;
 127         st->type = type;
 128         st->desc = desc;
 129         self_test_setparams(st);
 130         (void)st->cb(st->params, st->cb_arg);
 131     }
 132 }
 133
 134 /*
 135  * Can be used during application testing to log that a test has either
 136  * passed or failed.
 137  */
 138 void OSSL_SELF_TEST_onend(OSSL_SELF_TEST *st, int ret)
 139 {
 140     if (st != NULL && st->cb != NULL) {
 141         st->phase =
 142             (ret == 1 ? OSSL_SELF_TEST_PHASE_PASS : OSSL_SELF_TEST_PHASE_FAIL);
 143         self_test_setparams(st);
 144         (void)st->cb(st->params, st->cb_arg);
 145
 146         st->phase = OSSL_SELF_TEST_PHASE_NONE;
 147         st->type = OSSL_SELF_TEST_TYPE_NONE;
 148         st->desc = OSSL_SELF_TEST_DESC_NONE;
 149     }
 150 }
 151
 152 /*
 153  * Used for failure testing.
 154  *
 155  * Call the applications SELF_TEST_cb() if it exists.
 156  * If the application callback decides to return 0 then the first byte of 'bytes'
 157  * is modified (corrupted). This is used to modify output signatures or
 158  * ciphertext before they are verified or decrypted.
 159  */
 160 void OSSL_SELF_TEST_oncorrupt_byte(OSSL_SELF_TEST *st, unsigned char *bytes)
 161 {
 162     if (st != NULL && st->cb != NULL) {
 163         st->phase = OSSL_SELF_TEST_PHASE_CORRUPT;
 164         self_test_setparams(st);
 165         if (!st->cb(st->params, st->cb_arg))
 166             bytes[0] ^= 1;
 167     }
 168 }