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Refactor embedded mac verification in FIPS module

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Resolves: rhbz#2156045
This commit is contained in:
Dmitry Belyavskiy 2023-01-05 11:30:00 +01:00
parent 106fe8964c
commit 500ad3d300
2 changed files with 49 additions and 64 deletions
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107
0033-FIPS-embed-hmac.patch
View File

@ -1,7 +1,7 @@
diff -up openssl-3.0.0/providers/fips/self_test.c.embed-hmac openssl-3.0.0/providers/fips/self_test.c
--- openssl-3.0.0/providers/fips/self_test.c.embed-hmac 2021-11-16 13:57:05.127171056 +0100
+++ openssl-3.0.0/providers/fips/self_test.c 2021-11-16 14:07:21.963412455 +0100
@@ -171,11 +171,27 @@ DEP_FINI_ATTRIBUTE void cleanup(void)
diff -up openssl-3.0.7/providers/fips/self_test.c.embed-hmac openssl-3.0.7/providers/fips/self_test.c
--- openssl-3.0.7/providers/fips/self_test.c.embed-hmac 2023-01-05 10:03:44.864869710 +0100
+++ openssl-3.0.7/providers/fips/self_test.c 2023-01-05 10:15:17.041606472 +0100
@@ -172,11 +172,27 @@ DEP_FINI_ATTRIBUTE void cleanup(void)
}
#endif
@ -29,13 +29,7 @@ diff -up openssl-3.0.0/providers/fips/self_test.c.embed-hmac openssl-3.0.0/provi
static int verify_integrity(OSSL_CORE_BIO *bio, OSSL_FUNC_BIO_read_ex_fn read_ex_cb,
unsigned char *expected, size_t expected_len,
OSSL_LIB_CTX *libctx, OSSL_SELF_TEST *ev,
@@ -183,14 +199,26 @@ static int verify_integrity(OSSL_CORE_BI
{
int ret = 0, status;
unsigned char out[MAX_MD_SIZE];
- unsigned char buf[INTEGRITY_BUF_SIZE];
+ unsigned char buf[INTEGRITY_BUF_SIZE+HMAC_LEN];
size_t bytes_read = 0, out_len = 0;
@@ -189,9 +205,20 @@ static int verify_integrity(OSSL_CORE_BI
EVP_MAC *mac = NULL;
EVP_MAC_CTX *ctx = NULL;
OSSL_PARAM params[2], *p = params;
@ -44,7 +38,6 @@ diff -up openssl-3.0.0/providers/fips/self_test.c.embed-hmac openssl-3.0.0/provi
+ struct link_map *lm = NULL;
+ unsigned long paddr;
+ unsigned long off = 0;
+ int have_rest = 0;
OSSL_SELF_TEST_onbegin(ev, event_type, OSSL_SELF_TEST_DESC_INTEGRITY_HMAC);
@ -57,64 +50,52 @@ diff -up openssl-3.0.0/providers/fips/self_test.c.embed-hmac openssl-3.0.0/provi
mac = EVP_MAC_fetch(libctx, MAC_NAME, NULL);
if (mac == NULL)
goto err;
@@ -204,12 +233,53 @@ static int verify_integrity(OSSL_CORE_BI
@@ -205,13 +233,42 @@ static int verify_integrity(OSSL_CORE_BI
if (!EVP_MAC_init(ctx, fixed_key, sizeof(fixed_key), params))
goto err;
+ status = read_ex_cb(bio, buf, HMAC_LEN, &bytes_read);
+ if (status != 1 || bytes_read != HMAC_LEN)
+ goto err;
+ off += HMAC_LEN;
+
while (1) {
- while (1) {
- status = read_ex_cb(bio, buf, sizeof(buf), &bytes_read);
- if (status != 1)
+ status = read_ex_cb(bio, buf+HMAC_LEN, INTEGRITY_BUF_SIZE, &bytes_read);
+ if (status != 1) {
+ have_rest = 1;
+ break;
+ }
+
+ if (bytes_read == INTEGRITY_BUF_SIZE) { /* Full block */
+ /* Logic:
+ * We have HMAC_LEN (read before) + INTEGRITY_BUF_SIZE (read now) in buffer
+ * We calculate HMAC from first INTEGRITY_BUF_SIZE bytes
+ * and move last HMAC_LEN bytes to the beginning of the buffer
+ *
+ * If we have read (a part of) buffer fips_hmac_container
+ * we should replace it with zeros.
+ * If it is inside our current buffer, we will update now.
+ * If it intersects the upper bound, we will clean up on the next step.
+ */
+ if (off - HMAC_LEN <= paddr && paddr <= off + bytes_read)
+ memset (buf + HMAC_LEN + paddr - off, 0, HMAC_LEN);
+ off += bytes_read;
+
+ if (!EVP_MAC_update(ctx, buf, bytes_read))
+ goto err;
+ memcpy (buf, buf+INTEGRITY_BUF_SIZE, HMAC_LEN);
+ } else { /* Final block */
+ /* Logic is basically the same as in previous branch
+ * but we calculate HMAC from HMAC_LEN (rest of previous step)
+ * and bytes_read read on this step
+ * */
+ if (off - HMAC_LEN <= paddr && paddr <= off + bytes_read)
+ memset (buf + HMAC_LEN + paddr - off, 0, HMAC_LEN);
+ if (!EVP_MAC_update(ctx, buf, bytes_read+HMAC_LEN))
+ goto err;
+ off += bytes_read;
+ while ((off + INTEGRITY_BUF_SIZE) <= paddr) {
+ status = read_ex_cb(bio, buf, INTEGRITY_BUF_SIZE, &bytes_read);
if (status != 1)
break;
- if (!EVP_MAC_update(ctx, buf, bytes_read))
+ }
+ }
+ if (have_rest) {
+ if (!EVP_MAC_update(ctx, buf, HMAC_LEN))
if (!EVP_MAC_update(ctx, buf, bytes_read))
goto err;
+ off += HMAC_LEN;
+ off += bytes_read;
}
+
+ if (off + INTEGRITY_BUF_SIZE > paddr) {
+ int delta = paddr - off;
+ status = read_ex_cb(bio, buf, delta, &bytes_read);
+ if (status != 1)
+ goto err;
+ if (!EVP_MAC_update(ctx, buf, bytes_read))
+ goto err;
+ off += bytes_read;
+
+ status = read_ex_cb(bio, buf, HMAC_LEN, &bytes_read);
+ memset(buf, 0, HMAC_LEN);
+ if (status != 1)
+ goto err;
+ if (!EVP_MAC_update(ctx, buf, bytes_read))
+ goto err;
+ off += bytes_read;
+ }
+
+ while (bytes_read > 0) {
+ status = read_ex_cb(bio, buf, INTEGRITY_BUF_SIZE, &bytes_read);
+ if (status != 1)
+ break;
+ if (!EVP_MAC_update(ctx, buf, bytes_read))
+ goto err;
+ off += bytes_read;
+ }
+
if (!EVP_MAC_final(ctx, out, &out_len, sizeof(out)))
goto err;
@@ -284,8 +358,7 @@ int SELF_TEST_post(SELF_TEST_POST_PARAMS
@@ -285,8 +342,7 @@ int SELF_TEST_post(SELF_TEST_POST_PARAMS
CRYPTO_THREAD_unlock(fips_state_lock);
}
@ -124,7 +105,7 @@ diff -up openssl-3.0.0/providers/fips/self_test.c.embed-hmac openssl-3.0.0/provi
ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_CONFIG_DATA);
goto end;
}
@@ -294,8 +367,9 @@ int SELF_TEST_post(SELF_TEST_POST_PARAMS
@@ -305,8 +361,9 @@ int SELF_TEST_post(SELF_TEST_POST_PARAMS
if (ev == NULL)
goto end;
@ -136,7 +117,7 @@ diff -up openssl-3.0.0/providers/fips/self_test.c.embed-hmac openssl-3.0.0/provi
if (module_checksum == NULL) {
ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CONFIG_DATA);
goto end;
@@ -357,7 +431,6 @@ int SELF_TEST_post(SELF_TEST_POST_PARAMS
@@ -356,7 +413,6 @@ int SELF_TEST_post(SELF_TEST_POST_PARAMS
ok = 1;
end:
OSSL_SELF_TEST_free(ev);

6
openssl.spec
View File

@ -29,7 +29,7 @@ print(string.sub(hash, 0, 16))
Summary: Utilities from the general purpose cryptography library with TLS implementation
Name: openssl
Version: 3.0.7
Release: 1%{?dist}
Release: 2%{?dist}
Epoch: 1
# We have to remove certain patented algorithms from the openssl source
# tarball with the hobble-openssl script which is included below.
@ -530,6 +530,10 @@ install -m644 %{SOURCE9} \
%ldconfig_scriptlets libs
%changelog
* Thu Jan 05 2023 Dmitry Belyavskiy <dbelyavs@redhat.com> - 1:3.0.7-2
- Refactor embedded mac verification in FIPS module
Resolves: rhbz#2156045
* Fri Dec 23 2022 Dmitry Belyavskiy <dbelyavs@redhat.com> - 1:3.0.7-1
- Rebase to upstream version 3.0.7
- C99 compatibility in downstream-only 0032-Force-fips.patch