24 lines
579 B
C
24 lines
579 B
C
#include "fe25519.h"
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#include "ge25519.h"
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// NOTE: leaves in unfinished state
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void ge25519_batchpack_destructive_1(bytes32 *out, ge25519_p3 *in, fe25519 *tmp, size_t num)
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{
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fe25519 ty;
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fe25519_batchinvert(&in->z, &in->z, tmp, num, sizeof(ge25519_p3));
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for (size_t i = 0; i < num; ++i) {
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fe25519_mul(&ty, &in[i].y, &in[i].z);
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fe25519_pack(out[i], &ty);
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}
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}
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void ge25519_batchpack_destructive_finish(bytes32 out, ge25519_p3 *unf)
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{
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fe25519 tx;
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// z of unfinished is inverted
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fe25519_mul(&tx, &unf->x, &unf->z);
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out[31] ^= fe25519_getparity(&tx) << 7;
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}
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