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45 lines
604 B
C
45 lines
604 B
C
/* $OpenBSD: verify.c,v 1.2 2013/12/07 00:26:37 djm Exp $ */
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/* Public Domain, from supercop-20130419/crypto_verify/32/ref/verify.c */
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#include "crypto_api.h"
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int crypto_verify_32(const unsigned char *x,const unsigned char *y)
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{
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unsigned int differentbits = 0;
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#define F(i) differentbits |= x[i] ^ y[i];
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F(0)
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F(1)
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F(2)
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F(3)
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F(4)
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F(5)
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F(6)
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F(7)
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F(8)
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F(9)
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F(10)
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F(11)
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F(12)
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F(13)
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F(14)
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F(15)
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F(16)
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F(17)
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F(18)
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F(19)
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F(20)
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F(21)
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F(22)
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F(23)
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F(24)
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F(25)
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F(26)
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F(27)
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F(28)
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F(29)
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F(30)
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F(31)
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return (1 & ((differentbits - 1) >> 8)) - 1;
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}
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