46 lines
1.4 KiB
Plaintext
46 lines
1.4 KiB
Plaintext
#include <edsign.cuh>
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#include <ed25519.cuh>
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#include <sha512.cuh>
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__device__ void expand_key(unsigned char* expanded, const unsigned char* secret) {
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struct sha512_state s;
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memcpy(&s, &sha512_initial_state, sizeof(s));
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sha512_final(&s, secret);
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sha512_get(&s, expanded);
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ed25519_prepare(expanded);
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}
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__device__ void pp(unsigned char* packed, const struct ed25519_pt* p) {
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unsigned char x[32], y[32];
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ed25519_unproject(x, y, p);
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ed25519_pack(packed, x, y);
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}
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__device__ void sm_pack(unsigned char* r, const unsigned char* k) {
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struct ed25519_pt p;
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ed25519_smult(&p, &ed25519_base, k);
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pp(r, &p);
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}
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__device__ void edsign_sec_to_pub(unsigned char* pub, const unsigned char* secret) {
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unsigned char expanded[64];
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expand_key(expanded, secret);
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sm_pack(pub, expanded);
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}
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__device__ void compact_wipe(void* __restrict__ data) {
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volatile unsigned char* p = (volatile unsigned char*)data;
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unsigned long i = 0;
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#pragma unroll
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for (; i + 3 < 32; i += 4) {
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p[i] = 0;
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p[i + 1] = 0;
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p[i + 2] = 0;
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p[i + 3] = 0;
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}
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#pragma unroll
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for (; i < 32; i++) {
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p[i] = 0;
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}
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}
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__device__ void ed25519_keygen(unsigned char private_key[64], unsigned char public_key[32], unsigned char random_seed[32]) {
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edsign_sec_to_pub(public_key, random_seed);
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memcpy(private_key, random_seed, 32);
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memcpy(private_key + 32, public_key, 32);
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compact_wipe(random_seed);
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} |