diff options
Diffstat (limited to 'third_party/heimdal/lib/hcrypto/libtommath/bn_mp_sqr.c')
-rw-r--r-- | third_party/heimdal/lib/hcrypto/libtommath/bn_mp_sqr.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_sqr.c b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_sqr.c new file mode 100644 index 0000000..e0d0a73 --- /dev/null +++ b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_sqr.c @@ -0,0 +1,28 @@ +#include "tommath_private.h" +#ifdef BN_MP_SQR_C +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ + +/* computes b = a*a */ +mp_err mp_sqr(const mp_int *a, mp_int *b) +{ + mp_err err; + if (MP_HAS(S_MP_TOOM_SQR) && /* use Toom-Cook? */ + (a->used >= MP_TOOM_SQR_CUTOFF)) { + err = s_mp_toom_sqr(a, b); + } else if (MP_HAS(S_MP_KARATSUBA_SQR) && /* Karatsuba? */ + (a->used >= MP_KARATSUBA_SQR_CUTOFF)) { + err = s_mp_karatsuba_sqr(a, b); + } else if (MP_HAS(S_MP_SQR_FAST) && /* can we use the fast comba multiplier? */ + (((a->used * 2) + 1) < MP_WARRAY) && + (a->used < (MP_MAXFAST / 2))) { + err = s_mp_sqr_fast(a, b); + } else if (MP_HAS(S_MP_SQR)) { + err = s_mp_sqr(a, b); + } else { + err = MP_VAL; + } + b->sign = MP_ZPOS; + return err; +} +#endif |