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firefox/D224588.1728128098.diff
Jan Horak 1f566f41b4 Add fips webrtc patch from https://issues.redhat.com/browse/RHEL-4208 
Related: RHEL-62903
2024-10-30 12:13:29 +01:00

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8.3 KiB
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diff --git a/third_party/libsrtp/src/crypto/cipher/aes_gcm_nss.c b/third_party/libsrtp/src/crypto/cipher/aes_gcm_nss.c
--- a/third_party/libsrtp/src/crypto/cipher/aes_gcm_nss.c
+++ b/third_party/libsrtp/src/crypto/cipher/aes_gcm_nss.c
@@ -54,10 +54,11 @@
#include "crypto_types.h"
#include "cipher_types.h"
#include "cipher_test_cases.h"
#include <secerr.h>
#include <nspr.h>
+#include "nss_fips.h"
srtp_debug_module_t srtp_mod_aes_gcm = {
0, /* debugging is off by default */
"aes gcm nss" /* printable module name */
};
@@ -211,12 +212,17 @@
if (!slot) {
return (srtp_err_status_cipher_fail);
}
SECItem key_item = { siBuffer, (unsigned char *)key, c->key_size };
- c->key = PK11_ImportSymKey(slot, CKM_AES_GCM, PK11_OriginUnwrap,
- CKA_ENCRYPT, &key_item, NULL);
+ if (PK11_IsFIPS()) {
+ c->key = PK11_ImportSymKey_FIPS(slot, CKM_AES_GCM, PK11_OriginUnwrap,
+ CKA_ENCRYPT, &key_item, NULL);
+ } else {
+ c->key = PK11_ImportSymKey(slot, CKM_AES_GCM, PK11_OriginUnwrap,
+ CKA_ENCRYPT, &key_item, NULL);
+ }
PK11_FreeSlot(slot);
if (!c->key) {
return (srtp_err_status_cipher_fail);
}
diff --git a/third_party/libsrtp/src/crypto/cipher/aes_icm_nss.c b/third_party/libsrtp/src/crypto/cipher/aes_icm_nss.c
--- a/third_party/libsrtp/src/crypto/cipher/aes_icm_nss.c
+++ b/third_party/libsrtp/src/crypto/cipher/aes_icm_nss.c
@@ -51,10 +51,11 @@
#include "crypto_types.h"
#include "err.h" /* for srtp_debug */
#include "alloc.h"
#include "cipher_types.h"
#include "cipher_test_cases.h"
+#include "nss_fips.h"
srtp_debug_module_t srtp_mod_aes_icm = {
0, /* debugging is off by default */
"aes icm nss" /* printable module name */
};
@@ -252,12 +253,17 @@
if (!slot) {
return srtp_err_status_bad_param;
}
SECItem keyItem = { siBuffer, (unsigned char *)key, c->key_size };
- c->key = PK11_ImportSymKey(slot, CKM_AES_CTR, PK11_OriginUnwrap,
- CKA_ENCRYPT, &keyItem, NULL);
+ if (PK11_IsFIPS()) {
+ c->key = PK11_ImportSymKey_FIPS(slot, CKM_AES_CTR, PK11_OriginUnwrap,
+ CKA_ENCRYPT, &keyItem, NULL);
+ } else {
+ c->key = PK11_ImportSymKey(slot, CKM_AES_CTR, PK11_OriginUnwrap,
+ CKA_ENCRYPT, &keyItem, NULL);
+ }
PK11_FreeSlot(slot);
if (!c->key) {
return srtp_err_status_cipher_fail;
}
diff --git a/third_party/libsrtp/src/crypto/include/nss_fips.h b/third_party/libsrtp/src/crypto/include/nss_fips.h
new file mode 100644
--- /dev/null
+++ b/third_party/libsrtp/src/crypto/include/nss_fips.h
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2024, Red Hat, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * Neither the name of the Red Hat, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/*
+ Adapted from Red Hat Ceph patch by
+ Radoslaw Zarzynski <rzarzyns@redhat.com>
+
+ PK11_ImportSymKey() is a part of NSS API that becomes unavailable
+ in the FIPS mode. Apparently NSS targets stricter restrictions
+ than those coming from Level 1 of FIPS 140-2. In the consequence,
+ loading a symmetric key from plain keyring or key db fails.
+
+ A raw crypto key is in-memory wrapped with fresh, random wrapping
+ key just before being imported via PK11_UnwrapSymKey(). Of course,
+ this effectively lowers to FIPS level 1. Still, this would be no
+ different from what OpenSSL gives in the matter.
+*/
+
+#ifndef NSS_FIPS_H
+#define NSS_FIPS_H
+
+static PK11SymKey *PK11_ImportSymKey_FIPS(
+ PK11SlotInfo * const slot,
+ const CK_MECHANISM_TYPE type,
+ const PK11Origin origin,
+ const CK_ATTRIBUTE_TYPE operation,
+ SECItem * const raw_key,
+ void * const wincx)
+{
+ PK11SymKey* wrapping_key = NULL;
+ PK11Context *wrap_key_crypt_context = NULL;
+ SECItem *raw_key_aligned = NULL;
+ CK_MECHANISM_TYPE wrap_mechanism = 0;
+
+ struct {
+ unsigned char data[256];
+ int len;
+ } wrapped_key;
+
+ #define SCOPE_DATA_FREE() \
+ { \
+ PK11_FreeSymKey(wrapping_key); \
+ PK11_DestroyContext(wrap_key_crypt_context, PR_TRUE); \
+ SECITEM_FreeItem(raw_key_aligned, PR_TRUE); \
+ }
+
+ if(raw_key->len > sizeof(wrapped_key.data)) {
+ return NULL;
+ }
+
+ // getting 306 on my system which is CKM_DES3_ECB.
+ wrap_mechanism = PK11_GetBestWrapMechanism(slot);
+
+ // Generate a wrapping key. It will be used exactly twice over the scope:
+ // * to encrypt raw_key giving wrapped_key,
+ // * to decrypt wrapped_key in the internals of PK11_UnwrapSymKey().
+ wrapping_key = PK11_KeyGen(slot, wrap_mechanism, NULL,
+ PK11_GetBestKeyLength(slot, wrap_mechanism), NULL);
+ if (wrapping_key == NULL) {
+ return NULL;
+ }
+
+ // Prepare a PK11 context for the raw_key -> wrapped_key encryption.
+ SECItem tmp_sec_item;
+ memset(&tmp_sec_item, 0, sizeof(tmp_sec_item));
+ wrap_key_crypt_context = PK11_CreateContextBySymKey(
+ wrap_mechanism,
+ CKA_ENCRYPT,
+ wrapping_key,
+ &tmp_sec_item);
+ if (wrap_key_crypt_context == NULL) {
+ SCOPE_DATA_FREE();
+ return NULL;
+ }
+
+ // Finally wrap the key. Important note is that the wrapping mechanism
+ // selection (read: just grabbing a cipher) offers, at least in my NSS
+ // copy, mostly CKM_*_ECB ciphers (with 3DES as the leading one, see
+ // wrapMechanismList[] in pk11mech.c). There is no CKM_*_*_PAD variant
+ // which means that plaintext we are providing to PK11_CipherOp() must
+ // be aligned to cipher's block size. For 3DES it's 64 bits.
+ raw_key_aligned = PK11_BlockData(raw_key, PK11_GetBlockSize(wrap_mechanism, NULL));
+ if (raw_key_aligned == NULL) {
+ SCOPE_DATA_FREE();
+ return NULL;
+ }
+
+ if (PK11_CipherOp(wrap_key_crypt_context, wrapped_key.data, &wrapped_key.len,
+ sizeof(wrapped_key.data), raw_key_aligned->data,
+ raw_key_aligned->len) != SECSuccess) {
+ SCOPE_DATA_FREE();
+ return NULL;
+ }
+
+ if (PK11_Finalize(wrap_key_crypt_context) != SECSuccess) {
+ SCOPE_DATA_FREE();
+ return NULL;
+ }
+
+ // Key is wrapped now so we can acquire the ultimate PK11SymKey through
+ // unwrapping it. Of course these two opposite operations form NOP with
+ // a side effect: FIPS level 1 compatibility.
+ memset(&tmp_sec_item, 0, sizeof(tmp_sec_item));
+
+ SECItem wrapped_key_item;
+ memset(&wrapped_key_item, 0, sizeof(wrapped_key_item));
+ wrapped_key_item.data = wrapped_key.data;
+ wrapped_key_item.len = wrapped_key.len;
+
+ PK11SymKey *ret = PK11_UnwrapSymKey(wrapping_key, wrap_mechanism,
+ &tmp_sec_item, &wrapped_key_item, type,
+ operation, raw_key->len);
+ SCOPE_DATA_FREE();
+ return ret;
+ }
+
+#endif // NSS_FIPS_H
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