37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
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#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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sha512_init(&s);
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sha512_final(&s, secret, 32);
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sha512_get(&s, expanded, 0, 64);
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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[F25519_SIZE], y[F25519_SIZE];
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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* data, unsigned long length) {
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volatile unsigned char* p = (volatile unsigned char*)data;
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while (length--) {
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*p++ = 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, 32);
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}
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