diff options
author | Micah Anderson <micah@riseup.net> | 2014-08-11 13:49:21 -0400 |
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committer | Micah Anderson <micah@riseup.net> | 2014-08-11 13:49:21 -0400 |
commit | 2e59f9740a29439df7c7a56cf0ae83dec3081d31 (patch) | |
tree | d5e7c4e74c9a0f1ea999327d2e68b1dd27be00e0 /src/libsodium/crypto_scalarmult/curve25519/ref10/fe_sub_curve25519_ref10.c |
initial import of debian version from mentors0.6.1
Diffstat (limited to 'src/libsodium/crypto_scalarmult/curve25519/ref10/fe_sub_curve25519_ref10.c')
-rw-r--r-- | src/libsodium/crypto_scalarmult/curve25519/ref10/fe_sub_curve25519_ref10.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/libsodium/crypto_scalarmult/curve25519/ref10/fe_sub_curve25519_ref10.c b/src/libsodium/crypto_scalarmult/curve25519/ref10/fe_sub_curve25519_ref10.c new file mode 100644 index 0000000..0fa4932 --- /dev/null +++ b/src/libsodium/crypto_scalarmult/curve25519/ref10/fe_sub_curve25519_ref10.c @@ -0,0 +1,61 @@ +#include "fe.h" + +#ifndef HAVE_TI_MODE + +/* +h = f - g +Can overlap h with f or g. + +Preconditions: + |f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. + |g| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. + +Postconditions: + |h| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. +*/ + +void fe_sub(fe h,fe f,fe g) +{ + crypto_int32 f0 = f[0]; + crypto_int32 f1 = f[1]; + crypto_int32 f2 = f[2]; + crypto_int32 f3 = f[3]; + crypto_int32 f4 = f[4]; + crypto_int32 f5 = f[5]; + crypto_int32 f6 = f[6]; + crypto_int32 f7 = f[7]; + crypto_int32 f8 = f[8]; + crypto_int32 f9 = f[9]; + crypto_int32 g0 = g[0]; + crypto_int32 g1 = g[1]; + crypto_int32 g2 = g[2]; + crypto_int32 g3 = g[3]; + crypto_int32 g4 = g[4]; + crypto_int32 g5 = g[5]; + crypto_int32 g6 = g[6]; + crypto_int32 g7 = g[7]; + crypto_int32 g8 = g[8]; + crypto_int32 g9 = g[9]; + crypto_int32 h0 = f0 - g0; + crypto_int32 h1 = f1 - g1; + crypto_int32 h2 = f2 - g2; + crypto_int32 h3 = f3 - g3; + crypto_int32 h4 = f4 - g4; + crypto_int32 h5 = f5 - g5; + crypto_int32 h6 = f6 - g6; + crypto_int32 h7 = f7 - g7; + crypto_int32 h8 = f8 - g8; + crypto_int32 h9 = f9 - g9; + h[0] = h0; + h[1] = h1; + h[2] = h2; + h[3] = h3; + h[4] = h4; + h[5] = h5; + h[6] = h6; + h[7] = h7; + h[8] = h8; + h[9] = h9; +} + +#endif |