merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 52 insertions, 0 deletions

diff --git a/third_party/git/sha1dc/ubc_check.h b/third_party/git/sha1dc/ubc_check.h
new file mode 100644
index 000000000000..d7e17dc734d0
--- /dev/null
+++ b/third_party/git/sha1dc/ubc_check.h
@@ -0,0 +1,52 @@
+/***
+* Copyright 2017 Marc Stevens <marc@marc-stevens.nl>, Dan Shumow <danshu@microsoft.com>
+* Distributed under the MIT Software License.
+* See accompanying file LICENSE.txt or copy at
+* https://opensource.org/licenses/MIT
+***/
+
+/*
+// this file was generated by the 'parse_bitrel' program in the tools section
+// using the data files from directory 'tools/data/3565'
+//
+// sha1_dvs contains a list of SHA-1 Disturbance Vectors (DV) to check
+// dvType, dvK and dvB define the DV: I(K,B) or II(K,B) (see the paper)
+// dm[80] is the expanded message block XOR-difference defined by the DV
+// testt is the step to do the recompression from for collision detection
+// maski and maskb define the bit to check for each DV in the dvmask returned by ubc_check
+//
+// ubc_check takes as input an expanded message block and verifies the unavoidable bitconditions for all listed DVs
+// it returns a dvmask where each bit belonging to a DV is set if all unavoidable bitconditions for that DV have been met
+// thus one needs to do the recompression check for each DV that has its bit set
+*/
+
+#ifndef SHA1DC_UBC_CHECK_H
+#define SHA1DC_UBC_CHECK_H
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#ifndef SHA1DC_NO_STANDARD_INCLUDES
+#include <stdint.h>
+#endif
+
+#define DVMASKSIZE 1
+typedef struct { int dvType; int dvK; int dvB; int testt; int maski; int maskb; uint32_t dm[80]; } dv_info_t;
+extern dv_info_t sha1_dvs[];
+void ubc_check(const uint32_t W[80], uint32_t dvmask[DVMASKSIZE]);
+
+#define DOSTORESTATE58
+#define DOSTORESTATE65
+
+#define CHECK_DVMASK(_DVMASK) (0 != _DVMASK[0])
+
+#if defined(__cplusplus)
+}
+#endif
+
+#ifdef SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H
+#include SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H
+#endif
+
+#endif