Merge branch 'jn/block-sha1'

The code to load a word one-byte-at-a-time was optimized into a
word-wide load instruction even when the pointer was not aligned,
which caused issues on architectures that do not like unaligned
access.

* jn/block-sha1:
Makefile: BLK_SHA1 does not require fast htonl() and unaligned loads
block-sha1: put expanded macro parameters in parentheses
block-sha1: avoid pointer conversion that violates alignment constraints

diff --git a/Makefile b/Makefile
index 34ca6e551f9221622ae6c3c8e1385c06e3df2963..b0b3493364550f9f443039708974902df1896413 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -127,9 +127,8 @@ all::
 # specify your own (or DarwinPort's) include directories and
 # library directories by defining CFLAGS and LDFLAGS appropriately.
 #
-# Define BLK_SHA1 environment variable if you want the C version
-# of the SHA1 that assumes you can do unaligned 32-bit loads and
-# have a fast htonl() function.
+# Define BLK_SHA1 environment variable to make use of the bundled
+# optimized C SHA1 routine.
 #
 # Define PPC_SHA1 environment variable when running make to make use of
 # a bundled SHA1 routine optimized for PowerPC.

diff --git a/block-sha1/sha1.c b/block-sha1/sha1.c
index c0054a0b0a441090184a141ee73954a94a2904d5..a8d4bf9301d25de60c02718b9d446edf5c665184 100644 (file)
--- a/block-sha1/sha1.c
+++ b/block-sha1/sha1.c
@@ -101,8 +101,8 @@
  * Where do we get the source from? The first 16 iterations get it from
  * the input data, the next mix it from the 512-bit array.
  */
-#define SHA_SRC(t) get_be32(data + t)
-#define SHA_MIX(t) SHA_ROL(W(t+13) ^ W(t+8) ^ W(t+2) ^ W(t), 1)
+#define SHA_SRC(t) get_be32((unsigned char *) block + (t)*4)
+#define SHA_MIX(t) SHA_ROL(W((t)+13) ^ W((t)+8) ^ W((t)+2) ^ W(t), 1);
 
 #define SHA_ROUND(t, input, fn, constant, A, B, C, D, E) do { \
        unsigned int TEMP = input(t); setW(t, TEMP); \
@@ -115,7 +115,7 @@
 #define T_40_59(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, ((B&C)+(D&(B^C))) , 0x8f1bbcdc, A, B, C, D, E )
 #define T_60_79(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) ,  0xca62c1d6, A, B, C, D, E )
 
-static void blk_SHA1_Block(blk_SHA_CTX *ctx, const unsigned int *data)
+static void blk_SHA1_Block(blk_SHA_CTX *ctx, const void *block)
 {
        unsigned int A,B,C,D,E;
        unsigned int array[16];
@@ -126,7 +126,7 @@ static void blk_SHA1_Block(blk_SHA_CTX *ctx, const unsigned int *data)
        D = ctx->H[3];
        E = ctx->H[4];
 
-       /* Round 1 - iterations 0-16 take their input from 'data' */
+       /* Round 1 - iterations 0-16 take their input from 'block' */
        T_0_15( 0, A, B, C, D, E);
        T_0_15( 1, E, A, B, C, D);
        T_0_15( 2, D, E, A, B, C);