tls: replace "26-bit" P256 code with 32-bit one.

function                                             old     new   delta
sp_256_ecc_mulmod_8                                    -    1171   +1171
sp_256_mod_mul_norm_8                                  -     834    +834
sp_256_proj_point_dbl_8                                -     374    +374
sp_256_mont_reduce_8                                   -     268    +268
sp_256_mont_mul_8                                      -     151    +151
sp_256_sub_8                                           -      76     +76
sp_256_add_8                                           -      76     +76
sp_256_cmp_8                                           -      38     +38
static.sp_256_mont_dbl_8                               -      31     +31
static.sp_256_mont_sub_8                               -      29     +29
sp_256_to_bin_8                                        -      28     +28
sp_256_point_from_bin2x32                             50      73     +23
sp_256_mont_sqr_8                                      -       7      +7
sp_256_mont_sqr_10                                     7       -      -7
p256_mod                                              40      32      -8
curve_P256_compute_pubkey_and_premaster              186     167     -19
sp_256_sub_10                                         22       -     -22
sp_256_add_10                                         22       -     -22
sp_256_cmp_10                                         24       -     -24
sp_256_norm_10                                        31       -     -31
static.sp_256_mont_sub_10                             49       -     -49
static.sp_256_mont_dbl_10                             52       -     -52
static.sp_256_mul_add_10                              82       -     -82
sp_256_from_bin_10                                   119       -    -119
sp_256_to_bin_10                                     120       -    -120
sp_256_mont_reduce_10                                178       -    -178
sp_256_mont_mul_10                                   214       -    -214
sp_256_proj_point_dbl_10                             451       -    -451
sp_256_ecc_mulmod_10                                1216       -   -1216
sp_256_mod_mul_norm_10                              1305       -   -1305
------------------------------------------------------------------------------
(add/remove: 12/15 grow/shrink: 1/2 up/down: 3106/-3919)     Total: -813 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 7 insertions, 8 deletions

diff --git a/networking/tls.c b/networking/tls.c
index 4f0e2b6eb..675ef4b3a 100644
--- a/networking/tls.c
+++ b/networking/tls.c
@@ -2334,7 +2334,6 @@ void FAST_FUNC tls_run_copy_loop(tls_state_t *tls, unsigned flags)
 // e.g. at the very beginning of wget_main()
 //
 {
-//kbuild:lib-$(CONFIG_TLS) += tls_sp_c32_new.o
         uint8_t ecc_pub_key32[2 * 32];
         uint8_t pubkey2x32[2 * 32];
         uint8_t premaster32[32];
@@ -2345,14 +2344,14 @@ void FAST_FUNC tls_run_copy_loop(tls_state_t *tls, unsigned flags)
 //      memset(ecc_pub_key32, 0x00, sizeof(ecc_pub_key32));
 //      ecc_pub_key32[18] = 0xab;
 //Random key:
-        tls_get_random(ecc_pub_key32, sizeof(ecc_pub_key32));
+//      tls_get_random(ecc_pub_key32, sizeof(ecc_pub_key32));
 //Biased random (almost all zeros or almost all ones):
-//      srand(time(NULL) ^ getpid());
-//      if (rand() & 1)
-//              memset(ecc_pub_key32, 0x00, sizeof(ecc_pub_key32));
-//      else
-//              memset(ecc_pub_key32, 0xff, sizeof(ecc_pub_key32));
-//      ecc_pub_key32[rand() & 0x3f] = rand();
+        srand(time(NULL) ^ getpid());
+        if (rand() & 1)
+                memset(ecc_pub_key32, 0x00, sizeof(ecc_pub_key32));
+        else
+                memset(ecc_pub_key32, 0xff, sizeof(ecc_pub_key32));
+        ecc_pub_key32[rand() & 0x3f] = rand();
 
         xmove_fd(xopen("p256.OLD", O_WRONLY | O_CREAT | O_TRUNC), 2);
         curve_P256_compute_pubkey_and_premaster(