Mercurial > dropbear
annotate libtommath/bn_mp_expt_d_ex.c @ 1631:292f79307600
fix some gcc warnings (#73)
* tweak string size
fix gcc8 warnings
```
svr-agentfwd.c: In function 'bindagent':
svr-agentfwd.c:254:53: warning: '%s' directive output may be truncated writing up to 107 bytes into a region of size between 0 and 107 [-Wformat-truncation=]
snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s", path, sockfile);
^~ ~~~~~~~~
svr-agentfwd.c:254:2: note: 'snprintf' output between 2 and 216 bytes into a destination of size 108
snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s", path, sockfile);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
* cleanup signed/unsigned comparison
fix gcc8 warnings
```
scp.c: In function 'do_local_cmd':
scp.c:132:17: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare]
for (i = 0; i < a->num; i++)
^
scpmisc.c: In function 'addargs':
scpmisc.c:161:25: warning: comparison of integer expressions of different signedness: 'int' and 'u_int' {aka 'unsigned int'} [-Wsign-compare]
} else if (args->num+2 >= nalloc)
^~
scpmisc.c: In function 'replacearg':
scpmisc.c:183:12: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare]
if (which >= args->num)
^~
scpmisc.c: In function 'freeargs':
scpmisc.c:196:17: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare]
for (i = 0; i < args->num; i++)
^
```
see https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/misc.h.diff?r1=1.16&r2=1.17
| author | François Perrad <francois.perrad@gadz.org> |
|---|---|
| date | Wed, 20 Mar 2019 15:25:15 +0100 |
| parents | 8bba51a55704 |
| children | f52919ffd3b1 |
| rev | line source |
|---|---|
| 1436 | 1 #include <tommath_private.h> |
| 2 #ifdef BN_MP_EXPT_D_EX_C | |
| 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis | |
| 4 * | |
| 5 * LibTomMath is a library that provides multiple-precision | |
| 6 * integer arithmetic as well as number theoretic functionality. | |
| 7 * | |
| 8 * The library was designed directly after the MPI library by | |
| 9 * Michael Fromberger but has been written from scratch with | |
| 10 * additional optimizations in place. | |
| 11 * | |
| 12 * The library is free for all purposes without any express | |
| 13 * guarantee it works. | |
| 14 * | |
| 15 * Tom St Denis, [email protected], http://libtom.org | |
| 16 */ | |
| 17 | |
| 18 /* calculate c = a**b using a square-multiply algorithm */ | |
| 19 int mp_expt_d_ex (mp_int * a, mp_digit b, mp_int * c, int fast) | |
| 20 { | |
| 21 int res; | |
| 22 unsigned int x; | |
| 23 | |
| 24 mp_int g; | |
| 25 | |
| 26 if ((res = mp_init_copy (&g, a)) != MP_OKAY) { | |
| 27 return res; | |
| 28 } | |
| 29 | |
| 30 /* set initial result */ | |
| 31 mp_set (c, 1); | |
| 32 | |
| 33 if (fast != 0) { | |
| 34 while (b > 0) { | |
| 35 /* if the bit is set multiply */ | |
| 36 if ((b & 1) != 0) { | |
| 37 if ((res = mp_mul (c, &g, c)) != MP_OKAY) { | |
| 38 mp_clear (&g); | |
| 39 return res; | |
| 40 } | |
| 41 } | |
| 42 | |
| 43 /* square */ | |
| 44 if (b > 1) { | |
| 45 if ((res = mp_sqr (&g, &g)) != MP_OKAY) { | |
| 46 mp_clear (&g); | |
| 47 return res; | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 /* shift to next bit */ | |
| 52 b >>= 1; | |
| 53 } | |
| 54 } | |
| 55 else { | |
| 56 for (x = 0; x < DIGIT_BIT; x++) { | |
| 57 /* square */ | |
| 58 if ((res = mp_sqr (c, c)) != MP_OKAY) { | |
| 59 mp_clear (&g); | |
| 60 return res; | |
| 61 } | |
| 62 | |
| 63 /* if the bit is set multiply */ | |
| 64 if ((b & (mp_digit) (((mp_digit)1) << (DIGIT_BIT - 1))) != 0) { | |
| 65 if ((res = mp_mul (c, &g, c)) != MP_OKAY) { | |
| 66 mp_clear (&g); | |
| 67 return res; | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 /* shift to next bit */ | |
| 72 b <<= 1; | |
| 73 } | |
| 74 } /* if ... else */ | |
| 75 | |
| 76 mp_clear (&g); | |
| 77 return MP_OKAY; | |
| 78 } | |
| 79 #endif | |
| 80 | |
|
1470
8bba51a55704
Update to libtommath v1.0.1
Matt Johnston <matt@ucc.asn.au>
parents:
1436
diff
changeset
|
81 /* ref: $Format:%D$ */ |
|
8bba51a55704
Update to libtommath v1.0.1
Matt Johnston <matt@ucc.asn.au>
parents:
1436
diff
changeset
|
82 /* git commit: $Format:%H$ */ |
|
8bba51a55704
Update to libtommath v1.0.1
Matt Johnston <matt@ucc.asn.au>
parents:
1436
diff
changeset
|
83 /* commit time: $Format:%ai$ */ |