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20 lines
315 B
20 lines
315 B
#include "fe.h"
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#include "crypto_verify_32.h"
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/*
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return 1 if f == 0
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return 0 if f != 0
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Preconditions:
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|f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
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*/
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static const unsigned char zero[32];
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int fe_isnonzero(const fe f)
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{
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unsigned char s[32];
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fe_tobytes(s,f);
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return crypto_verify_32(s,zero);
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}
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