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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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35 lines
684 B
35 lines
684 B
9 years ago
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#include <string.h>
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#include "crypto_sign.h"
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#include "crypto_hash_sha512.h"
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#include "ge.h"
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#include "sc.h"
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int crypto_sign(
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unsigned char *sig,
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const unsigned char* m, unsigned long long mlen,
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const unsigned char* sk, const unsigned char* pk
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)
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{
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unsigned char az[64];
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unsigned char nonce[64];
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unsigned char hram[64];
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ge_p3 R;
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crypto_hash_sha512(az,sk,32);
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az[0] &= 248;
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az[31] &= 63;
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az[31] |= 64;
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crypto_hash_sha512_2(nonce, az + 32, 32, m, mlen);
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sc_reduce(nonce);
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ge_scalarmult_base(&R,nonce);
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ge_p3_tobytes(sig,&R);
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crypto_hash_sha512_3(hram, sig, 32, pk, 32, m, mlen);
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sc_reduce(hram);
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sc_muladd(sig + 32,hram,az,nonce);
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return 0;
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}
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