spanification: Add #pragma allow_unsafe_buffers to crypto/*

This is a preparation to fix each files.
This CL has no behavior changes.

This patch was fully automated using script:
https://paste.googleplex.com/5614491201175552

Note that in patchset2, change to:
/build/config/unsafe_buffers_paths.txt
was reverted. Indeed, running too many (~3) CQ run touching this file is
making the builder cache much slower. I will bundle every change to this
file in a subsequent CL. I will limit myself to 1-2 CQ run per day.

See internal doc about it:
https://docs.google.com/document/d/1erdcokeh6rfBqs_h0drHqSLtbDbB61j7j3O2Pz8NH78/edit?resourcekey=0-hNe6w1hYAYyVXGEpWI7HVA&tab=t.0

Bug: 351564777
Change-Id: I591e950b19fd09010f8da04e91382bfc1c8ad103
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5717875
Reviewed-by: David Benjamin <davidben@chromium.org>
Auto-Submit: Arthur Sonzogni <arthursonzogni@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1329662}

crypto/ec_private_key.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/ec_private_key.h"
 
 #include <stddef.h>

crypto/encryptor.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/encryptor.h"
 
 #include <stddef.h>

crypto/encryptor_unittest.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/encryptor.h"
 
 #include <stddef.h>

crypto/hmac.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/hmac.h"
 
 #include <stddef.h>

crypto/hmac_unittest.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/hmac.h"
 
 #include <stddef.h>

crypto/nss_key_util.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/nss_key_util.h"
 
 #include <cryptohi.h>

crypto/nss_key_util_unittest.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/nss_key_util.h"
 
 #include <keyhi.h>

crypto/p224_spake_unittest.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/p224_spake.h"
 
 #include <stddef.h>

crypto/rsa_private_key.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/rsa_private_key.h"
 
 #include <stdint.h>

crypto/rsa_private_key_unittest.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/rsa_private_key.h"
 
 #include <stdint.h>

crypto/secure_hash_unittest.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/secure_hash.h"
 
 #include <stddef.h>

crypto/sha2_unittest.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/sha2.h"
 
 #include <stddef.h>

crypto/signature_verifier.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/signature_verifier.h"
 
 #include <memory>

crypto/signature_verifier_unittest.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/signature_verifier.h"
 
 #include <stddef.h>

crypto/unexportable_key_mac.mm

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/unexportable_key.h"
 
 #import <CoreFoundation/CoreFoundation.h>

crypto/unexportable_key_software_unsecure.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "base/check.h"
 #include "build/build_config.h"
 #include "crypto/sha2.h"

crypto/unexportable_key_win.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/unexportable_key_win.h"
 
 #include <string>

crypto/user_verifying_key_win.cc

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifdef UNSAFE_BUFFERS_BUILD
+// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
+#pragma allow_unsafe_buffers
+#endif
+
 #include "crypto/user_verifying_key.h"
 
 #include <windows.h>