Mercurial > dropbear
annotate libtommath/bn_mp_clamp.c @ 1812:552bb9b4f16a
Make releases tarballs more deterministic
Not fully tested on different systems yet
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Tue, 30 Mar 2021 22:08:14 +0800 |
| parents | 1051e4eea25a |
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| rev | line source |
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1655
f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
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1 #include "tommath_private.h" |
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2 #ifdef BN_MP_CLAMP_C |
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Update LibTomMath to 1.2.0 (#84)
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis */ |
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1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
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4 /* SPDX-License-Identifier: Unlicense */ |
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parents:
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5 |
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1655
f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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6 /* trim unused digits |
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7 * |
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Matt Johnston <matt@ucc.asn.au>
parents:
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8 * This is used to ensure that leading zero digits are |
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parents:
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9 * trimed and the leading "used" digit will be non-zero |
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parents:
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10 * Typically very fast. Also fixes the sign if there |
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11 * are no more leading digits |
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parents:
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12 */ |
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1655
f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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13 void mp_clamp(mp_int *a) |
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14 { |
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1655
f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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15 /* decrease used while the most significant digit is |
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f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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16 * zero. |
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f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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17 */ |
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f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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18 while ((a->used > 0) && (a->dp[a->used - 1] == 0u)) { |
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f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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19 --(a->used); |
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f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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20 } |
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parents:
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21 |
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1655
f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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22 /* reset the sign flag if used == 0 */ |
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f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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23 if (a->used == 0) { |
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f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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24 a->sign = MP_ZPOS; |
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f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
changeset
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25 } |
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Matt Johnston <matt@ucc.asn.au>
parents:
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26 } |
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eed26cff980b
propagate from branch 'au.asn.ucc.matt.ltm.dropbear' (head 6c790cad5a7fa866ad062cb3a0c279f7ba788583)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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27 #endif |