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#include "ed25519.h" |
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#include "sha512.h" |
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#include "ge.h" |
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#include "sc.h" |
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1564
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void ed25519_sign(unsigned char *signature, const unsigned char *message, size_t message_len, const unsigned char *public_key, const unsigned char *private_key) { |
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sha512_context hash; |
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unsigned char hram[64]; |
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unsigned char r[64]; |
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ge_p3 R; |
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1564
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sha512_init(&hash); |
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1564
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sha512_update(&hash, private_key + 32, 32); |
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1564
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sha512_update(&hash, message, message_len); |
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1564
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sha512_final(&hash, r); |
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1564
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sc_reduce(r); |
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1564
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ge_scalarmult_base(&R, r); |
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1564
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ge_p3_tobytes(signature, &R); |
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1564
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sha512_init(&hash); |
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1564
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sha512_update(&hash, signature, 32); |
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1564
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sha512_update(&hash, public_key, 32); |
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1564
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sha512_update(&hash, message, message_len); |
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1564
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sha512_final(&hash, hram); |
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1564
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sc_reduce(hram); |
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1564
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sc_muladd(signature + 32, hram, private_key, r); |
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1564
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} |