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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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34 lines
672 B
34 lines
672 B
#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, size_t 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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