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| author | Atousa Pahlevan Duprat <apahlevan@ieee.org> | 2015-11-05 06:38:42 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2015-11-05 18:35:11 (GMT) |
| commit | 001fd7a90b5851f62e700510729a5e09706f9b63 (patch) | |
| tree | 125503b4986b65ef3da657d506a4adb2ec1add8c /compat | |
| parent | 3bc72fde3f35b988c902abf5a0bc027f2e54d0c1 (diff) | |
| download | git-001fd7a90b5851f62e700510729a5e09706f9b63.zip git-001fd7a90b5851f62e700510729a5e09706f9b63.tar.gz git-001fd7a90b5851f62e700510729a5e09706f9b63.tar.bz2 | |
sha1: allow limiting the size of the data passed to SHA1_Update()
Using the previous commit's inredirection mechanism for SHA1,
support a chunked implementation of SHA1_Update() that limits the
amount of data in the chunk passed to SHA1_Update().
This is enabled by using the Makefile variable SHA1_MAX_BLOCK_SIZE
to specify chunk size. When using Apple's CommonCrypto library this
is set to 1GiB (the implementation cannot handle more 4GiB).
Signed-off-by: Atousa Pahlevan Duprat <apahlevan@ieee.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'compat')
| -rw-r--r-- | compat/apple-common-crypto.h | 4 | ||||
| -rw-r--r-- | compat/sha1-chunked.c | 19 | ||||
| -rw-r--r-- | compat/sha1-chunked.h | 2 |
3 files changed, 25 insertions, 0 deletions
diff --git a/compat/apple-common-crypto.h b/compat/apple-common-crypto.h index c8b9b0e..d3fb264 100644 --- a/compat/apple-common-crypto.h +++ b/compat/apple-common-crypto.h @@ -16,6 +16,10 @@ #undef TYPE_BOOL #endif +#ifndef SHA1_MAX_BLOCK_SIZE +#error Using Apple Common Crypto library requires setting SHA1_MAX_BLOCK_SIZE +#endif + #ifdef APPLE_LION_OR_NEWER #define git_CC_error_check(pattern, err) \ do { \ diff --git a/compat/sha1-chunked.c b/compat/sha1-chunked.c new file mode 100644 index 0000000..6adfcfd --- /dev/null +++ b/compat/sha1-chunked.c @@ -0,0 +1,19 @@ +#include "cache.h" + +int git_SHA1_Update_Chunked(platform_SHA_CTX *c, const void *data, size_t len) +{ + size_t nr; + size_t total = 0; + const char *cdata = (const char*)data; + + while (len) { + nr = len; + if (nr > SHA1_MAX_BLOCK_SIZE) + nr = SHA1_MAX_BLOCK_SIZE; + platform_SHA1_Update(c, cdata, nr); + total += nr; + cdata += nr; + len -= nr; + } + return total; +} diff --git a/compat/sha1-chunked.h b/compat/sha1-chunked.h new file mode 100644 index 0000000..7b2df28 --- /dev/null +++ b/compat/sha1-chunked.h @@ -0,0 +1,2 @@ + +int git_SHA1_Update_Chunked(platform_SHA_CTX *c, const void *data, size_t len); |