Use 32-bit wide integer type in PolarSSL code

A look at what this does on 64 bit systems since we were using the
unnecessarily large 'unsigned long' type before even though it was 64
bits wide:

$ ~/bin/bloat-o-meter libalpm.so.old lib/libalpm/.libs/libalpm.so
add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-10412 (-10412)
function                                     old     new   delta
md5_finish                                   370     356     -14
sha2_finish                                  547     531     -16
md5_process                                 3762    2643   -1119
sha2_process                               20356   11093   -9263

The code size is nearly halved in the sha2 case (44% smaller code size),
and md5 gets a nice size reduction (27% smaller) as well.

We also move base64 code to <stdint.h> types as well; we can use
'uint32_t' rather than 'unsigned long' for at least two variables in the
decode function. This doesn't net the same size benefit as the hash code
case, but it is more proper.

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 44 insertions, 43 deletions

diff --git a/lib/libalpm/sha2.c b/lib/libalpm/sha2.c
index 3632c131..366dc650 100644
--- a/lib/libalpm/sha2.c
+++ b/lib/libalpm/sha2.c
@@ -38,28 +38,29 @@
  *  * removal of SELF_TEST code
  *  * removal of ipad and opad from the sha2_context struct in sha2.h
  *  * increase the size of buffer for performance reasons
- *  * various static changes
+ *  * change 'unsigned long' to uint32_t
  */
 
 #include <stdio.h>
+#include <stdint.h>
 
 #include "sha2.h"
 
 /*
  * 32-bit integer manipulation macros (big endian)
  */
-#ifndef GET_ULONG_BE
-#define GET_ULONG_BE(n,b,i)                             \
+#ifndef GET_U32_BE
+#define GET_U32_BE(n,b,i)                               \
 {                                                       \
-    (n) = ( (unsigned long) (b)[(i)    ] << 24 )        \
-        | ( (unsigned long) (b)[(i) + 1] << 16 )        \
-        | ( (unsigned long) (b)[(i) + 2] <<  8 )        \
-        | ( (unsigned long) (b)[(i) + 3]       );       \
+    (n) = ( (uint32_t) (b)[(i)    ] << 24 )             \
+        | ( (uint32_t) (b)[(i) + 1] << 16 )             \
+        | ( (uint32_t) (b)[(i) + 2] <<  8 )             \
+        | ( (uint32_t) (b)[(i) + 3]       );            \
 }
 #endif
 
-#ifndef PUT_ULONG_BE
-#define PUT_ULONG_BE(n,b,i)                             \
+#ifndef PUT_U32_BE
+#define PUT_U32_BE(n,b,i)                               \
 {                                                       \
     (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
     (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
@@ -106,25 +107,25 @@ static void sha2_starts( sha2_context *ctx, int is224 )
 
 static void sha2_process( sha2_context *ctx, const unsigned char data[64] )
 {
-    unsigned long temp1, temp2, W[64];
-    unsigned long A, B, C, D, E, F, G, H;
-
-    GET_ULONG_BE( W[ 0], data,  0 );
-    GET_ULONG_BE( W[ 1], data,  4 );
-    GET_ULONG_BE( W[ 2], data,  8 );
-    GET_ULONG_BE( W[ 3], data, 12 );
-    GET_ULONG_BE( W[ 4], data, 16 );
-    GET_ULONG_BE( W[ 5], data, 20 );
-    GET_ULONG_BE( W[ 6], data, 24 );
-    GET_ULONG_BE( W[ 7], data, 28 );
-    GET_ULONG_BE( W[ 8], data, 32 );
-    GET_ULONG_BE( W[ 9], data, 36 );
-    GET_ULONG_BE( W[10], data, 40 );
-    GET_ULONG_BE( W[11], data, 44 );
-    GET_ULONG_BE( W[12], data, 48 );
-    GET_ULONG_BE( W[13], data, 52 );
-    GET_ULONG_BE( W[14], data, 56 );
-    GET_ULONG_BE( W[15], data, 60 );
+    uint32_t temp1, temp2, W[64];
+    uint32_t A, B, C, D, E, F, G, H;
+
+    GET_U32_BE( W[ 0], data,  0 );
+    GET_U32_BE( W[ 1], data,  4 );
+    GET_U32_BE( W[ 2], data,  8 );
+    GET_U32_BE( W[ 3], data, 12 );
+    GET_U32_BE( W[ 4], data, 16 );
+    GET_U32_BE( W[ 5], data, 20 );
+    GET_U32_BE( W[ 6], data, 24 );
+    GET_U32_BE( W[ 7], data, 28 );
+    GET_U32_BE( W[ 8], data, 32 );
+    GET_U32_BE( W[ 9], data, 36 );
+    GET_U32_BE( W[10], data, 40 );
+    GET_U32_BE( W[11], data, 44 );
+    GET_U32_BE( W[12], data, 48 );
+    GET_U32_BE( W[13], data, 52 );
+    GET_U32_BE( W[14], data, 56 );
+    GET_U32_BE( W[15], data, 60 );
 
 #define  SHR(x,n) ((x & 0xFFFFFFFF) >> n)
 #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
@@ -241,7 +242,7 @@ static void sha2_process( sha2_context *ctx, const unsigned char data[64] )
 static void sha2_update( sha2_context *ctx, const unsigned char *input, size_t ilen )
 {
     size_t fill;
-    unsigned long left;
+    uint32_t left;
 
     if( ilen <= 0 )
         return;
@@ -249,10 +250,10 @@ static void sha2_update( sha2_context *ctx, const unsigned char *input, size_t i
     left = ctx->total[0] & 0x3F;
     fill = 64 - left;
 
-    ctx->total[0] += (unsigned long) ilen;
+    ctx->total[0] += (uint32_t) ilen;
     ctx->total[0] &= 0xFFFFFFFF;
 
-    if( ctx->total[0] < (unsigned long) ilen )
+    if( ctx->total[0] < (uint32_t) ilen )
         ctx->total[1]++;
 
     if( left && ilen >= fill )
@@ -292,16 +293,16 @@ static const unsigned char sha2_padding[64] =
  */
 static void sha2_finish( sha2_context *ctx, unsigned char output[32] )
 {
-    unsigned long last, padn;
-    unsigned long high, low;
+    uint32_t last, padn;
+    uint32_t high, low;
     unsigned char msglen[8];
 
     high = ( ctx->total[0] >> 29 )
          | ( ctx->total[1] <<  3 );
     low  = ( ctx->total[0] <<  3 );
 
-    PUT_ULONG_BE( high, msglen, 0 );
-    PUT_ULONG_BE( low,  msglen, 4 );
+    PUT_U32_BE( high, msglen, 0 );
+    PUT_U32_BE( low,  msglen, 4 );
 
     last = ctx->total[0] & 0x3F;
     padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
@@ -309,16 +310,16 @@ static void sha2_finish( sha2_context *ctx, unsigned char output[32] )
     sha2_update( ctx, (unsigned char *) sha2_padding, padn );
     sha2_update( ctx, msglen, 8 );
 
-    PUT_ULONG_BE( ctx->state[0], output,  0 );
-    PUT_ULONG_BE( ctx->state[1], output,  4 );
-    PUT_ULONG_BE( ctx->state[2], output,  8 );
-    PUT_ULONG_BE( ctx->state[3], output, 12 );
-    PUT_ULONG_BE( ctx->state[4], output, 16 );
-    PUT_ULONG_BE( ctx->state[5], output, 20 );
-    PUT_ULONG_BE( ctx->state[6], output, 24 );
+    PUT_U32_BE( ctx->state[0], output,  0 );
+    PUT_U32_BE( ctx->state[1], output,  4 );
+    PUT_U32_BE( ctx->state[2], output,  8 );
+    PUT_U32_BE( ctx->state[3], output, 12 );
+    PUT_U32_BE( ctx->state[4], output, 16 );
+    PUT_U32_BE( ctx->state[5], output, 20 );
+    PUT_U32_BE( ctx->state[6], output, 24 );
 
     if( ctx->is224 == 0 )
-        PUT_ULONG_BE( ctx->state[7], output, 28 );
+        PUT_U32_BE( ctx->state[7], output, 28 );
 }
 
 /*