mirror of https://github.com/hak5/openwrt.git
px5g-standalone: use /dev/urandom instead of havege (fixes #20216)
Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 47025lede-17.01
Felix Fietkau
parent
6c6508d0e1
commit
9893f5f00e
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@ -1,276 +0,0 @@
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/*
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* HAVEGE: HArdware Volatile Entropy Gathering and Expansion
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*
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* Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
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*
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* Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
|
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the names of PolarSSL or XySSL nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* The HAVEGE RNG was designed by Andre Seznec in 2002.
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*
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* http://www.irisa.fr/caps/projects/hipsor/publi.php
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*
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* Contact: seznec(at)irisa_dot_fr - orocheco(at)irisa_dot_fr
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*/
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#include <string.h>
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#include <time.h>
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#include "polarssl/config.h"
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#if defined(POLARSSL_HAVEGE_C)
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#include "polarssl/havege.h"
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#include "polarssl/timing.h"
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/* ------------------------------------------------------------------------
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* On average, one iteration accesses two 8-word blocks in the havege WALK
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* table, and generates 16 words in the RES array.
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*
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* The data read in the WALK table is updated and permuted after each use.
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* The result of the hardware clock counter read is used for this update.
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*
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* 25 conditional tests are present. The conditional tests are grouped in
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* two nested groups of 12 conditional tests and 1 test that controls the
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* permutation; on average, there should be 6 tests executed and 3 of them
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* should be mispredicted.
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* ------------------------------------------------------------------------
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*/
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#define SWAP(X,Y) { int *T = X; X = Y; Y = T; }
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#define TST1_ENTER if( PTEST & 1 ) { PTEST ^= 3; PTEST >>= 1;
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#define TST2_ENTER if( PTEST & 1 ) { PTEST ^= 3; PTEST >>= 1;
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#define TST1_LEAVE U1++; }
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#define TST2_LEAVE U2++; }
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#define ONE_ITERATION \
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\
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PTEST = PT1 >> 20; \
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\
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TST1_ENTER TST1_ENTER TST1_ENTER TST1_ENTER \
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TST1_ENTER TST1_ENTER TST1_ENTER TST1_ENTER \
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TST1_ENTER TST1_ENTER TST1_ENTER TST1_ENTER \
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\
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TST1_LEAVE TST1_LEAVE TST1_LEAVE TST1_LEAVE \
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TST1_LEAVE TST1_LEAVE TST1_LEAVE TST1_LEAVE \
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TST1_LEAVE TST1_LEAVE TST1_LEAVE TST1_LEAVE \
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\
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PTX = (PT1 >> 18) & 7; \
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PT1 &= 0x1FFF; \
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PT2 &= 0x1FFF; \
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CLK = (int) hardclock(); \
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\
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i = 0; \
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A = &WALK[PT1 ]; RES[i++] ^= *A; \
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B = &WALK[PT2 ]; RES[i++] ^= *B; \
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C = &WALK[PT1 ^ 1]; RES[i++] ^= *C; \
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D = &WALK[PT2 ^ 4]; RES[i++] ^= *D; \
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\
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IN = (*A >> (1)) ^ (*A << (31)) ^ CLK; \
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*A = (*B >> (2)) ^ (*B << (30)) ^ CLK; \
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*B = IN ^ U1; \
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*C = (*C >> (3)) ^ (*C << (29)) ^ CLK; \
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*D = (*D >> (4)) ^ (*D << (28)) ^ CLK; \
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\
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A = &WALK[PT1 ^ 2]; RES[i++] ^= *A; \
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B = &WALK[PT2 ^ 2]; RES[i++] ^= *B; \
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C = &WALK[PT1 ^ 3]; RES[i++] ^= *C; \
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D = &WALK[PT2 ^ 6]; RES[i++] ^= *D; \
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\
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if( PTEST & 1 ) SWAP( A, C ); \
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\
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IN = (*A >> (5)) ^ (*A << (27)) ^ CLK; \
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*A = (*B >> (6)) ^ (*B << (26)) ^ CLK; \
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*B = IN; CLK = (int) hardclock(); \
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*C = (*C >> (7)) ^ (*C << (25)) ^ CLK; \
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*D = (*D >> (8)) ^ (*D << (24)) ^ CLK; \
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\
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A = &WALK[PT1 ^ 4]; \
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B = &WALK[PT2 ^ 1]; \
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\
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PTEST = PT2 >> 1; \
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\
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PT2 = (RES[(i - 8) ^ PTY] ^ WALK[PT2 ^ PTY ^ 7]); \
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PT2 = ((PT2 & 0x1FFF) & (~8)) ^ ((PT1 ^ 8) & 0x8); \
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PTY = (PT2 >> 10) & 7; \
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\
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TST2_ENTER TST2_ENTER TST2_ENTER TST2_ENTER \
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TST2_ENTER TST2_ENTER TST2_ENTER TST2_ENTER \
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TST2_ENTER TST2_ENTER TST2_ENTER TST2_ENTER \
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\
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TST2_LEAVE TST2_LEAVE TST2_LEAVE TST2_LEAVE \
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TST2_LEAVE TST2_LEAVE TST2_LEAVE TST2_LEAVE \
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TST2_LEAVE TST2_LEAVE TST2_LEAVE TST2_LEAVE \
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\
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C = &WALK[PT1 ^ 5]; \
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D = &WALK[PT2 ^ 5]; \
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\
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RES[i++] ^= *A; \
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RES[i++] ^= *B; \
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RES[i++] ^= *C; \
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RES[i++] ^= *D; \
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\
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IN = (*A >> ( 9)) ^ (*A << (23)) ^ CLK; \
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*A = (*B >> (10)) ^ (*B << (22)) ^ CLK; \
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*B = IN ^ U2; \
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*C = (*C >> (11)) ^ (*C << (21)) ^ CLK; \
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*D = (*D >> (12)) ^ (*D << (20)) ^ CLK; \
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\
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A = &WALK[PT1 ^ 6]; RES[i++] ^= *A; \
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B = &WALK[PT2 ^ 3]; RES[i++] ^= *B; \
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C = &WALK[PT1 ^ 7]; RES[i++] ^= *C; \
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D = &WALK[PT2 ^ 7]; RES[i++] ^= *D; \
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\
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IN = (*A >> (13)) ^ (*A << (19)) ^ CLK; \
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*A = (*B >> (14)) ^ (*B << (18)) ^ CLK; \
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*B = IN; \
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*C = (*C >> (15)) ^ (*C << (17)) ^ CLK; \
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*D = (*D >> (16)) ^ (*D << (16)) ^ CLK; \
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\
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PT1 = ( RES[(i - 8) ^ PTX] ^ \
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WALK[PT1 ^ PTX ^ 7] ) & (~1); \
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PT1 ^= (PT2 ^ 0x10) & 0x10; \
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\
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for( n++, i = 0; i < 16; i++ ) \
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hs->pool[n % COLLECT_SIZE] ^= RES[i];
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/*
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* Entropy gathering function
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*/
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static void havege_fill( havege_state *hs )
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{
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int i, n = 0;
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int U1, U2, *A, *B, *C, *D;
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int PT1, PT2, *WALK, RES[16];
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int PTX, PTY, CLK, PTEST, IN;
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WALK = hs->WALK;
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PT1 = hs->PT1;
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PT2 = hs->PT2;
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PTX = U1 = 0;
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PTY = U2 = 0;
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memset( RES, 0, sizeof( RES ) );
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while( n < COLLECT_SIZE * 4 )
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{
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ONE_ITERATION
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ONE_ITERATION
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ONE_ITERATION
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ONE_ITERATION
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}
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hs->PT1 = PT1;
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hs->PT2 = PT2;
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hs->offset[0] = 0;
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hs->offset[1] = COLLECT_SIZE / 2;
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}
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/*
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* HAVEGE initialization
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*/
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void havege_init( havege_state *hs )
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{
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memset( hs, 0, sizeof( havege_state ) );
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havege_fill( hs );
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}
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/*
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* HAVEGE rand function
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*/
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int havege_rand( void *p_rng )
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{
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int ret;
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havege_state *hs = (havege_state *) p_rng;
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if( hs->offset[1] >= COLLECT_SIZE )
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havege_fill( hs );
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ret = hs->pool[hs->offset[0]++];
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ret ^= hs->pool[hs->offset[1]++];
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return( ret );
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}
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#if defined(POLARSSL_RAND_TEST)
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#include <stdio.h>
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int main( int argc, char *argv[] )
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{
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FILE *f;
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time_t t;
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int i, j, k;
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havege_state hs;
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unsigned char buf[1024];
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if( argc < 2 )
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{
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fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
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return( 1 );
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}
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if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
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{
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printf( "failed to open '%s' for writing.\n", argv[0] );
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return( 1 );
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}
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havege_init( &hs );
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t = time( NULL );
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for( i = 0, k = 32768; i < k; i++ )
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{
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for( j = 0; j < sizeof( buf ); j++ )
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buf[j] = havege_rand( &hs );
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fwrite( buf, sizeof( buf ), 1, f );
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printf( "Generating 32Mb of data in file '%s'... %04.1f" \
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"%% done\r", argv[1], (100 * (float) (i + 1)) / k );
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fflush( stdout );
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}
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if( t == time( NULL ) )
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t--;
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fclose( f );
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return( 0 );
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}
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#endif
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#endif
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@ -1,75 +0,0 @@
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/**
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* \file havege.h
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*
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* Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
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*
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* Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
|
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the names of PolarSSL or XySSL nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef POLARSSL_HAVEGE_H
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#define POLARSSL_HAVEGE_H
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#define COLLECT_SIZE 1024
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/**
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* \brief HAVEGE state structure
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*/
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typedef struct
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{
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int PT1, PT2, offset[2];
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int pool[COLLECT_SIZE];
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int WALK[8192];
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}
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havege_state;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief HAVEGE initialization
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*
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* \param hs HAVEGE state to be initialized
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*/
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void havege_init( havege_state *hs );
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/**
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* \brief HAVEGE rand function
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*
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* \param rng_st points to an HAVEGE state
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*
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* \return A random int
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*/
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int havege_rand( void *p_rng );
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#ifdef __cplusplus
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}
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#endif
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#endif /* havege.h */
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@ -23,7 +23,8 @@
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#include <string.h>
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#include <string.h>
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#include <time.h>
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#include <time.h>
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#include <limits.h>
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#include <limits.h>
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#include "polarssl/havege.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include "polarssl/bignum.h"
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#include "polarssl/bignum.h"
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#include "polarssl/x509.h"
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#include "polarssl/x509.h"
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#include "polarssl/rsa.h"
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#include "polarssl/rsa.h"
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@ -32,8 +33,17 @@
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#define PX5G_COPY "Copyright (c) 2009 Steven Barth <steven@midlink.org>"
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#define PX5G_COPY "Copyright (c) 2009 Steven Barth <steven@midlink.org>"
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#define PX5G_LICENSE "Licensed under the GNU Lesser General Public License v2.1"
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#define PX5G_LICENSE "Licensed under the GNU Lesser General Public License v2.1"
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||||||
|
|
||||||
|
static int urandom_fd;
|
||||||
|
|
||||||
|
static int _urandom(void *ctx)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
read(urandom_fd, &ret, sizeof(ret));
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
int rsakey(char **arg) {
|
int rsakey(char **arg) {
|
||||||
havege_state hs;
|
|
||||||
rsa_context rsa;
|
rsa_context rsa;
|
||||||
|
|
||||||
unsigned int ksize = 512;
|
unsigned int ksize = 512;
|
||||||
|
|
@ -57,8 +67,7 @@ int rsakey(char **arg) {
|
||||||
ksize = (unsigned int)atoi(*arg);
|
ksize = (unsigned int)atoi(*arg);
|
||||||
}
|
}
|
||||||
|
|
||||||
havege_init(&hs);
|
rsa_init(&rsa, RSA_PKCS_V15, 0, _urandom, NULL);
|
||||||
rsa_init(&rsa, RSA_PKCS_V15, 0, havege_rand, &hs);
|
|
||||||
|
|
||||||
fprintf(stderr, "Generating RSA private key, %i bit long modulus\n", ksize);
|
fprintf(stderr, "Generating RSA private key, %i bit long modulus\n", ksize);
|
||||||
if (rsa_gen_key(&rsa, ksize, exp)) {
|
if (rsa_gen_key(&rsa, ksize, exp)) {
|
||||||
|
|
@ -76,7 +85,6 @@ int rsakey(char **arg) {
|
||||||
}
|
}
|
||||||
|
|
||||||
int selfsigned(char **arg) {
|
int selfsigned(char **arg) {
|
||||||
havege_state hs;
|
|
||||||
rsa_context rsa;
|
rsa_context rsa;
|
||||||
x509_node node;
|
x509_node node;
|
||||||
|
|
||||||
|
|
@ -139,8 +147,7 @@ int selfsigned(char **arg) {
|
||||||
arg++;
|
arg++;
|
||||||
}
|
}
|
||||||
|
|
||||||
havege_init(&hs);
|
rsa_init(&rsa, RSA_PKCS_V15, 0, _urandom, NULL);
|
||||||
rsa_init(&rsa, RSA_PKCS_V15, 0, havege_rand, &hs);
|
|
||||||
x509write_init_node(&node);
|
x509write_init_node(&node);
|
||||||
fprintf(stderr, "Generating RSA private key, %i bit long modulus\n", ksize);
|
fprintf(stderr, "Generating RSA private key, %i bit long modulus\n", ksize);
|
||||||
if (rsa_gen_key(&rsa, ksize, exp)) {
|
if (rsa_gen_key(&rsa, ksize, exp)) {
|
||||||
|
|
@ -184,6 +191,12 @@ int selfsigned(char **arg) {
|
||||||
}
|
}
|
||||||
|
|
||||||
int main(int argc, char *argv[]) {
|
int main(int argc, char *argv[]) {
|
||||||
|
urandom_fd = open("/dev/urandom", O_RDONLY);
|
||||||
|
if (urandom_fd < 0) {
|
||||||
|
perror("open(/dev/urandom)");
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
if (!argv[1]) {
|
if (!argv[1]) {
|
||||||
//Usage
|
//Usage
|
||||||
} else if (!strcmp(argv[1], "rsakey")) {
|
} else if (!strcmp(argv[1], "rsakey")) {
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue