providers/fips/self_test_kats.c

   1 /*
   2  * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 <string.h>
  11 #include <openssl/evp.h>
  12 #include <openssl/kdf.h>
  13 #include "internal/nelem.h"
  14 #include "self_test.h"
  15 #include "self_test_data.inc"
  16
  17 static int self_test_digest(const ST_KAT_DIGEST *t, OSSL_ST_EVENT *event,
  18                             OPENSSL_CTX *libctx)
  19 {
  20     int ok = 0;
  21     unsigned char out[EVP_MAX_MD_SIZE];
  22     unsigned int out_len = 0;
  23     EVP_MD_CTX *ctx = EVP_MD_CTX_new();
  24     EVP_MD *md = EVP_MD_fetch(libctx, t->algorithm, NULL);
  25
  26     SELF_TEST_EVENT_onbegin(event, OSSL_SELF_TEST_TYPE_KAT_DIGEST, t->desc);
  27
  28     if (ctx == NULL
  29             || md == NULL
  30             || !EVP_DigestInit_ex(ctx, md, NULL)
  31             || !EVP_DigestUpdate(ctx, t->pt, t->pt_len)
  32             || !EVP_DigestFinal(ctx, out, &out_len))
  33         goto err;
  34
  35     /* Optional corruption */
  36     SELF_TEST_EVENT_oncorrupt_byte(event, out);
  37
  38     if (out_len != t->expected_len
  39             || memcmp(out, t->expected, out_len) != 0)
  40         goto err;
  41     ok = 1;
  42 err:
  43     SELF_TEST_EVENT_onend(event, ok);
  44     EVP_MD_free(md);
  45     EVP_MD_CTX_free(ctx);
  46
  47     return ok;
  48 }
  49
  50 /*
  51  * Helper function to setup a EVP_CipherInit
  52  * Used to hide the complexity of Authenticated ciphers.
  53  */
  54 static int cipher_init(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
  55                        const ST_KAT_CIPHER *t, int enc)
  56 {
  57     unsigned char *in_tag = NULL;
  58     int pad = 0, tmp;
  59
  60     /* Flag required for Key wrapping */
  61     EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
  62     if (t->tag == NULL) {
  63         /* Use a normal cipher init */
  64         return EVP_CipherInit_ex(ctx, cipher, NULL, t->key, t->iv, enc)
  65                && EVP_CIPHER_CTX_set_padding(ctx, pad);
  66     }
  67
  68     /* The authenticated cipher init */
  69     if (!enc)
  70         in_tag = (unsigned char *)t->tag;
  71
  72     return EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)
  73            && EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, t->iv_len, NULL)
  74            && (in_tag == NULL
  75                || EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, t->tag_len,
  76                                       in_tag))
  77            && EVP_CipherInit_ex(ctx, NULL, NULL, t->key, t->iv, enc)
  78            && EVP_CIPHER_CTX_set_padding(ctx, pad)
  79            && EVP_CipherUpdate(ctx, NULL, &tmp, t->aad, t->aad_len);
  80 }
  81
  82 /* Test a single KAT for encrypt/decrypt */
  83 static int self_test_cipher(const ST_KAT_CIPHER *t, OSSL_ST_EVENT *event,
  84                             OPENSSL_CTX *libctx)
  85 {
  86     int ret = 0, encrypt = 1, len, ct_len = 0, pt_len = 0;
  87     EVP_CIPHER_CTX *ctx = NULL;
  88     EVP_CIPHER *cipher = NULL;
  89     unsigned char ct_buf[256] = { 0 };
  90     unsigned char pt_buf[256] = { 0 };
  91
  92     SELF_TEST_EVENT_onbegin(event, OSSL_SELF_TEST_TYPE_KAT_CIPHER, t->base.desc);
  93
  94     ctx = EVP_CIPHER_CTX_new();
  95     if (ctx == NULL)
  96         goto end;
  97     cipher = EVP_CIPHER_fetch(libctx, t->base.algorithm, "");
  98     if (cipher == NULL)
  99         goto end;
 100
 101     /* Encrypt plain text message */
 102     if (!cipher_init(ctx, cipher, t, encrypt)
 103             || !EVP_CipherUpdate(ctx, ct_buf, &len, t->base.pt, t->base.pt_len)
 104             || !EVP_CipherFinal_ex(ctx, ct_buf + len, &ct_len))
 105         goto end;
 106
 107     SELF_TEST_EVENT_oncorrupt_byte(event, ct_buf);
 108     ct_len += len;
 109     if (ct_len != (int)t->base.expected_len
 110         || memcmp(t->base.expected, ct_buf, ct_len) != 0)
 111         goto end;
 112
 113     if (t->tag != NULL) {
 114         unsigned char tag[16] = { 0 };
 115
 116         if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, t->tag_len, tag)
 117             || memcmp(tag, t->tag, t->tag_len) != 0)
 118             goto end;
 119     }
 120
 121     if (!(cipher_init(ctx, cipher, t, !encrypt)
 122           && EVP_CipherUpdate(ctx, pt_buf, &len, ct_buf, ct_len)
 123           && EVP_CipherFinal_ex(ctx, pt_buf + len, &pt_len)))
 124         goto end;
 125     pt_len += len;
 126
 127     if (pt_len != (int)t->base.pt_len
 128             || memcmp(pt_buf, t->base.pt, pt_len) != 0)
 129         goto end;
 130
 131     ret = 1;
 132 end:
 133     EVP_CIPHER_free(cipher);
 134     EVP_CIPHER_CTX_free(ctx);
 135     SELF_TEST_EVENT_onend(event, ret);
 136     return ret;
 137 }
 138
 139 static int self_test_kdf(const ST_KAT_KDF *t, OSSL_ST_EVENT *event,
 140                          OPENSSL_CTX *libctx)
 141 {
 142     int ret = 0;
 143     int i;
 144     unsigned char out[64];
 145     EVP_KDF *kdf = NULL;
 146     EVP_KDF_CTX *ctx = NULL;
 147     OSSL_PARAM params[16];
 148     const OSSL_PARAM *settables = NULL;
 149
 150     SELF_TEST_EVENT_onbegin(event, OSSL_SELF_TEST_TYPE_KAT_KDF, t->desc);
 151
 152     kdf = EVP_KDF_fetch(libctx, t->algorithm, "");
 153     ctx = EVP_KDF_CTX_new(kdf);
 154     if (ctx == NULL)
 155         goto end;
 156
 157     settables = EVP_KDF_settable_ctx_params(kdf);
 158     for (i = 0; t->ctrls[i].name != NULL; ++i) {
 159         if (!OSSL_PARAM_allocate_from_text(&params[i], settables,
 160                                            t->ctrls[i].name,
 161                                            t->ctrls[i].value,
 162                                            strlen(t->ctrls[i].value)))
 163             goto end;
 164     }
 165     params[i] = OSSL_PARAM_construct_end();
 166     if (!EVP_KDF_CTX_set_params(ctx, params))
 167         goto end;
 168
 169     if (t->expected_len > sizeof(out))
 170         goto end;
 171     if (EVP_KDF_derive(ctx, out, t->expected_len) <= 0)
 172         goto end;
 173
 174     SELF_TEST_EVENT_oncorrupt_byte(event, out);
 175
 176     if (memcmp(out, t->expected,  t->expected_len) != 0)
 177         goto end;
 178
 179     ret = 1;
 180 end:
 181     for (i = 0; params[i].key != NULL; ++i)
 182         OPENSSL_free(params[i].data);
 183     EVP_KDF_free(kdf);
 184     EVP_KDF_CTX_free(ctx);
 185     SELF_TEST_EVENT_onend(event, ret);
 186     return ret;
 187 }
 188
 189 /*
 190  * Test a data driven list of KAT's for digest algorithms.
 191  * All tests are run regardless of if they fail or not.
 192  * Return 0 if any test fails.
 193  */
 194 static int self_test_digests(OSSL_ST_EVENT *event, OPENSSL_CTX *libctx)
 195 {
 196     int i, ret = 1;
 197
 198     for (i = 0; i < (int)OSSL_NELEM(st_kat_digest_tests); ++i) {
 199         if (!self_test_digest(&st_kat_digest_tests[i], event, libctx))
 200             ret = 0;
 201     }
 202     return ret;
 203 }
 204
 205 static int self_test_ciphers(OSSL_ST_EVENT *event, OPENSSL_CTX *libctx)
 206 {
 207     int i, ret = 1;
 208
 209     for (i = 0; i < (int)OSSL_NELEM(st_kat_cipher_tests); ++i) {
 210         if (!self_test_cipher(&st_kat_cipher_tests[i], event, libctx))
 211             ret = 0;
 212     }
 213     return ret;
 214 }
 215
 216 static int self_test_kdfs(OSSL_ST_EVENT *event, OPENSSL_CTX *libctx)
 217 {
 218     int i, ret = 1;
 219
 220     for (i = 0; i < (int)OSSL_NELEM(st_kat_kdf_tests); ++i) {
 221         if (!self_test_kdf(&st_kat_kdf_tests[i], event, libctx))
 222             ret = 0;
 223     }
 224     return ret;
 225 }
 226
 227 /*
 228  * Run the algorithm KAT's.
 229  * Return 1 is successful, otherwise return 0.
 230  * This runs all the tests regardless of if any fail.
 231  *
 232  * TODO(3.0) Add self tests for KA, DRBG, Sign/Verify when they become available
 233  */
 234 int SELF_TEST_kats(OSSL_ST_EVENT *event, OPENSSL_CTX *libctx)
 235 {
 236     int ret = 1;
 237
 238     if (!self_test_digests(event, libctx))
 239         ret = 0;
 240     if (!self_test_ciphers(event, libctx))
 241         ret = 0;
 242     if (!self_test_kdfs(event, libctx))
 243         ret = 0;
 244
 245     return ret;
 246 }