path: root/t/helper/test-tool.c
diff options
authorbrian m. carlson <>2018-11-14 04:09:36 (GMT)
committerJunio C Hamano <>2018-11-14 07:54:53 (GMT)
commit13eeedb5d17ca3539600b6618d103b652ecc8ab0 (patch)
tree4b4dd03dafa7c67d234c8f6da3e49c4a80234f76 /t/helper/test-tool.c
parentc166599862d10a273f61b834559eaa567c3dbfd9 (diff)
Add a base implementation of SHA-256 support
SHA-1 is weak and we need to transition to a new hash function. For some time, we have referred to this new function as NewHash. Recently, we decided to pick SHA-256 as NewHash. The reasons behind the choice of SHA-256 are outlined in the thread starting at [1] and in the commit history for the hash function transition document. Add a basic implementation of SHA-256 based off libtomcrypt, which is in the public domain. Optimize it and restructure it to meet our coding standards. Pull in the update and final functions from the SHA-1 block implementation, as we know these function correctly with all compilers. This implementation is slower than SHA-1, but more performant implementations will be introduced in future commits. Wire up SHA-256 in the list of hash algorithms, and add a test that the algorithm works correctly. Note that with this patch, it is still not possible to switch to using SHA-256 in Git. Additional patches are needed to prepare the code to handle a larger hash algorithm and further test fixes are needed. [1] Signed-off-by: brian m. carlson <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 't/helper/test-tool.c')
1 files changed, 1 insertions, 0 deletions
diff --git a/t/helper/test-tool.c b/t/helper/test-tool.c
index e009c81..2a65193 100644
--- a/t/helper/test-tool.c
+++ b/t/helper/test-tool.c
@@ -43,6 +43,7 @@ static struct test_cmd cmds[] = {
{ "scrap-cache-tree", cmd__scrap_cache_tree },
{ "sha1", cmd__sha1 },
{ "sha1-array", cmd__sha1_array },
+ { "sha256", cmd__sha256 },
{ "sigchain", cmd__sigchain },
{ "strcmp-offset", cmd__strcmp_offset },
{ "string-list", cmd__string_list },