38 lines
605 B
C
38 lines
605 B
C
/*
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rand256.c
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Created: Oct 2000 by Philip Homburg <philip@f-mnx.phicoh.com>
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Generate 256-bit random numbers
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*/
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#include <sha2.h>
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#include "inet.h"
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#include "rand256.h"
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PRIVATE u32_t base_bits[8];
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PUBLIC void init_rand256(bits)
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u8_t bits[32];
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{
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memcpy(base_bits, bits, sizeof(base_bits));
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}
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PUBLIC void rand256(bits)
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u8_t bits[32];
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{
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u32_t a;
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SHA256_CTX ctx;
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a= ++base_bits[0];
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if (a == 0)
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base_bits[1]++;
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SHA256_Init(&ctx);
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SHA256_Update(&ctx, (unsigned char *)base_bits, sizeof(base_bits));
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SHA256_Final(bits, &ctx);
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}
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/*
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* $PchId: rand256.c,v 1.1 2005/06/28 14:13:43 philip Exp $
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*/
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