diff options
Diffstat (limited to 'hash.h')
| -rw-r--r-- | hash.h | 40 |
1 files changed, 34 insertions, 6 deletions
@@ -15,6 +15,31 @@ #include "block-sha1/sha1.h" #endif +#ifndef platform_SHA_CTX +/* + * platform's underlying implementation of SHA-1; could be OpenSSL, + * blk_SHA, Apple CommonCrypto, etc... Note that the relevant + * SHA-1 header may have already defined platform_SHA_CTX for our + * own implementations like block-sha1 and ppc-sha1, so we list + * the default for OpenSSL compatible SHA-1 implementations here. + */ +#define platform_SHA_CTX SHA_CTX +#define platform_SHA1_Init SHA1_Init +#define platform_SHA1_Update SHA1_Update +#define platform_SHA1_Final SHA1_Final +#endif + +#define git_SHA_CTX platform_SHA_CTX +#define git_SHA1_Init platform_SHA1_Init +#define git_SHA1_Update platform_SHA1_Update +#define git_SHA1_Final platform_SHA1_Final + +#ifdef SHA1_MAX_BLOCK_SIZE +#include "compat/sha1-chunked.h" +#undef git_SHA1_Update +#define git_SHA1_Update git_SHA1_Update_Chunked +#endif + /* * Note that these constants are suitable for indexing the hash_algos array and * comparing against each other, but are otherwise arbitrary, so they should not @@ -30,9 +55,15 @@ /* Number of algorithms supported (including unknown). */ #define GIT_HASH_NALGOS (GIT_HASH_SHA1 + 1) -typedef void (*git_hash_init_fn)(void *ctx); -typedef void (*git_hash_update_fn)(void *ctx, const void *in, size_t len); -typedef void (*git_hash_final_fn)(unsigned char *hash, void *ctx); +/* A suitably aligned type for stack allocations of hash contexts. */ +union git_hash_ctx { + git_SHA_CTX sha1; +}; +typedef union git_hash_ctx git_hash_ctx; + +typedef void (*git_hash_init_fn)(git_hash_ctx *ctx); +typedef void (*git_hash_update_fn)(git_hash_ctx *ctx, const void *in, size_t len); +typedef void (*git_hash_final_fn)(unsigned char *hash, git_hash_ctx *ctx); struct git_hash_algo { /* @@ -44,9 +75,6 @@ struct git_hash_algo { /* A four-byte version identifier, used in pack indices. */ uint32_t format_id; - /* The size of a hash context (e.g. git_SHA_CTX). */ - size_t ctxsz; - /* The length of the hash in binary. */ size_t rawsz; |