diff options
| -rw-r--r-- | crypto/testmgr.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/crypto/testmgr.c b/crypto/testmgr.c index fe0cdf162d99..87abfd1ce232 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -1767,6 +1767,226 @@ static int test_aead_vec(const char *driver, int enc, return 0; } +#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS +/* + * Generate an AEAD test vector from the given implementation. + * Assumes the buffers in 'vec' were already allocated. + */ +static void generate_random_aead_testvec(struct aead_request *req, + struct aead_testvec *vec, + unsigned int maxkeysize, + unsigned int maxdatasize, + char *name, size_t max_namelen) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + const unsigned int ivsize = crypto_aead_ivsize(tfm); + unsigned int maxauthsize = crypto_aead_alg(tfm)->maxauthsize; + unsigned int authsize; + unsigned int total_len; + int i; + struct scatterlist src[2], dst; + u8 iv[MAX_IVLEN]; + DECLARE_CRYPTO_WAIT(wait); + + /* Key: length in [0, maxkeysize], but usually choose maxkeysize */ + vec->klen = maxkeysize; + if (prandom_u32() % 4 == 0) + vec->klen = prandom_u32() % (maxkeysize + 1); + generate_random_bytes((u8 *)vec->key, vec->klen); + vec->setkey_error = crypto_aead_setkey(tfm, vec->key, vec->klen); + + /* IV */ + generate_random_bytes((u8 *)vec->iv, ivsize); + + /* Tag length: in [0, maxauthsize], but usually choose maxauthsize */ + authsize = maxauthsize; + if (prandom_u32() % 4 == 0) + authsize = prandom_u32() % (maxauthsize + 1); + if (WARN_ON(authsize > maxdatasize)) + authsize = maxdatasize; + maxdatasize -= authsize; + vec->setauthsize_error = crypto_aead_setauthsize(tfm, authsize); + + /* Plaintext and associated data */ + total_len = generate_random_length(maxdatasize); + if (prandom_u32() % 4 == 0) + vec->alen = 0; + else + vec->alen = generate_random_length(total_len); + vec->plen = total_len - vec->alen; + generate_random_bytes((u8 *)vec->assoc, vec->alen); + generate_random_bytes((u8 *)vec->ptext, vec->plen); + + vec->clen = vec->plen + authsize; + + /* + * If the key or authentication tag size couldn't be set, no need to + * continue to encrypt. + */ + if (vec->setkey_error || vec->setauthsize_error) + goto done; + + /* Ciphertext */ + sg_init_table(src, 2); + i = 0; + if (vec->alen) + sg_set_buf(&src[i++], vec->assoc, vec->alen); + if (vec->plen) + sg_set_buf(&src[i++], vec->ptext, vec->plen); + sg_init_one(&dst, vec->ctext, vec->alen + vec->clen); + memcpy(iv, vec->iv, ivsize); + aead_request_set_callback(req, 0, crypto_req_done, &wait); + aead_request_set_crypt(req, src, &dst, vec->plen, iv); + aead_request_set_ad(req, vec->alen); + vec->crypt_error = crypto_wait_req(crypto_aead_encrypt(req), &wait); + if (vec->crypt_error == 0) + memmove((u8 *)vec->ctext, vec->ctext + vec->alen, vec->clen); +done: + snprintf(name, max_namelen, + "\"random: alen=%u plen=%u authsize=%u klen=%u\"", + vec->alen, vec->plen, authsize, vec->klen); +} + +/* + * Test the AEAD algorithm represented by @req against the corresponding generic + * implementation, if one is available. + */ +static int test_aead_vs_generic_impl(const char *driver, + const struct alg_test_desc *test_desc, + struct aead_request *req, + struct cipher_test_sglists *tsgls) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + const unsigned int ivsize = crypto_aead_ivsize(tfm); + const unsigned int maxauthsize = crypto_aead_alg(tfm)->maxauthsize; + const unsigned int blocksize = crypto_aead_blocksize(tfm); + const unsigned int maxdatasize = (2 * PAGE_SIZE) - TESTMGR_POISON_LEN; + const char *algname = crypto_aead_alg(tfm)->base.cra_name; + const char *generic_driver = test_desc->generic_driver; + char _generic_driver[CRYPTO_MAX_ALG_NAME]; + struct crypto_aead *generic_tfm = NULL; + struct aead_request *generic_req = NULL; + unsigned int maxkeysize; + unsigned int i; + struct aead_testvec vec = { 0 }; + char vec_name[64]; + struct testvec_config cfg; + char cfgname[TESTVEC_CONFIG_NAMELEN]; + int err; + + if (noextratests) + return 0; + + if (!generic_driver) { /* Use default naming convention? */ + err = build_generic_driver_name(algname, _generic_driver); + if (err) + return err; + generic_driver = _generic_driver; + } + + if (strcmp(generic_driver, driver) == 0) /* Already the generic impl? */ + return 0; + + generic_tfm = crypto_alloc_aead(generic_driver, 0, 0); + if (IS_ERR(generic_tfm)) { + err = PTR_ERR(generic_tfm); + if (err == -ENOENT) { + pr_warn("alg: aead: skipping comparison tests for %s because %s is unavailable\n", + driver, generic_driver); + return 0; + } + pr_err("alg: aead: error allocating %s (generic impl of %s): %d\n", + generic_driver, algname, err); + return err; + } + + generic_req = aead_request_alloc(generic_tfm, GFP_KERNEL); + if (!generic_req) { + err = -ENOMEM; + goto out; + } + + /* Check the algorithm properties for consistency. */ + + if (maxauthsize != crypto_aead_alg(generic_tfm)->maxauthsize) { + pr_err("alg: aead: maxauthsize for %s (%u) doesn't match generic impl (%u)\n", + driver, maxauthsize, + crypto_aead_alg(generic_tfm)->maxauthsize); + err = -EINVAL; + goto out; + } + + if (ivsize != crypto_aead_ivsize(generic_tfm)) { + pr_err("alg: aead: ivsize for %s (%u) doesn't match generic impl (%u)\n", + driver, ivsize, crypto_aead_ivsize(generic_tfm)); + err = -EINVAL; + goto out; + } + + if (blocksize != crypto_aead_blocksize(generic_tfm)) { + pr_err("alg: aead: blocksize for %s (%u) doesn't match generic impl (%u)\n", + driver, blocksize, crypto_aead_blocksize(generic_tfm)); + err = -EINVAL; + goto out; + } + + /* + * Now generate test vectors using the generic implementation, and test + * the other implementation against them. + */ + + maxkeysize = 0; + for (i = 0; i < test_desc->suite.aead.count; i++) + maxkeysize = max_t(unsigned int, maxkeysize, + test_desc->suite.aead.vecs[i].klen); + + vec.key = kmalloc(maxkeysize, GFP_KERNEL); + vec.iv = kmalloc(ivsize, GFP_KERNEL); + vec.assoc = kmalloc(maxdatasize, GFP_KERNEL); + vec.ptext = kmalloc(maxdatasize, GFP_KERNEL); + vec.ctext = kmalloc(maxdatasize, GFP_KERNEL); + if (!vec.key || !vec.iv || !vec.assoc || !vec.ptext || !vec.ctext) { + err = -ENOMEM; + goto out; + } + + for (i = 0; i < fuzz_iterations * 8; i++) { + generate_random_aead_testvec(generic_req, &vec, + maxkeysize, maxdatasize, + vec_name, sizeof(vec_name)); + generate_random_testvec_config(&cfg, cfgname, sizeof(cfgname)); + + err = test_aead_vec_cfg(driver, ENCRYPT, &vec, vec_name, &cfg, + req, tsgls); + if (err) + goto out; + err = test_aead_vec_cfg(driver, DECRYPT, &vec, vec_name, &cfg, + req, tsgls); + if (err) + goto out; + cond_resched(); + } + err = 0; +out: + kfree(vec.key); + kfree(vec.iv); + kfree(vec.assoc); + kfree(vec.ptext); + kfree(vec.ctext); + crypto_free_aead(generic_tfm); + aead_request_free(generic_req); + return err; +} +#else /* !CONFIG_CRYPTO_MANAGER_EXTRA_TESTS */ +static int test_aead_vs_generic_impl(const char *driver, + const struct alg_test_desc *test_desc, + struct aead_request *req, + struct cipher_test_sglists *tsgls) +{ + return 0; +} +#endif /* !CONFIG_CRYPTO_MANAGER_EXTRA_TESTS */ + static int test_aead(const char *driver, int enc, const struct aead_test_suite *suite, struct aead_request *req, @@ -1826,6 +2046,10 @@ static int alg_test_aead(const struct alg_test_desc *desc, const char *driver, goto out; err = test_aead(driver, DECRYPT, suite, req, tsgls); + if (err) + goto out; + + err = test_aead_vs_generic_impl(driver, desc, req, tsgls); out: free_cipher_test_sglists(tsgls); aead_request_free(req); @@ -3599,6 +3823,7 @@ static const struct alg_test_desc alg_test_descs[] = { } }, { .alg = "ccm(aes)", + .generic_driver = "ccm_base(ctr(aes-generic),cbcmac(aes-generic))", .test = alg_test_aead, .fips_allowed = 1, .suite = { @@ -4017,6 +4242,7 @@ static const struct alg_test_desc alg_test_descs[] = { } }, { .alg = "gcm(aes)", + .generic_driver = "gcm_base(ctr(aes-generic),ghash-generic)", .test = alg_test_aead, .fips_allowed = 1, .suite = { @@ -4288,6 +4514,7 @@ static const struct alg_test_desc alg_test_descs[] = { } }, { .alg = "rfc4106(gcm(aes))", + .generic_driver = "rfc4106(gcm_base(ctr(aes-generic),ghash-generic))", .test = alg_test_aead, .fips_allowed = 1, .suite = { @@ -4295,6 +4522,7 @@ static const struct alg_test_desc alg_test_descs[] = { } }, { .alg = "rfc4309(ccm(aes))", + .generic_driver = "rfc4309(ccm_base(ctr(aes-generic),cbcmac(aes-generic)))", .test = alg_test_aead, .fips_allowed = 1, .suite = { @@ -4302,6 +4530,7 @@ static const struct alg_test_desc alg_test_descs[] = { } }, { .alg = "rfc4543(gcm(aes))", + .generic_driver = "rfc4543(gcm_base(ctr(aes-generic),ghash-generic))", .test = alg_test_aead, .suite = { .aead = __VECS(aes_gcm_rfc4543_tv_template) |
