1 |
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2 | const { crypto_scalarmult_base } = require('./crypto_scalarmult')
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3 | const { crypto_generichash } = require('./crypto_generichash')
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4 | const { randombytes_buf } = require('./randombytes')
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5 | const assert = require('nanoassert')
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6 |
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7 | const crypto_kx_SEEDBYTES = 32
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8 | const crypto_kx_PUBLICKEYBYTES = 32
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9 | const crypto_kx_SECRETKEYBYTES = 32
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10 |
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11 | function crypto_kx_keypair (pk, sk) {
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12 | assert(pk.byteLength === crypto_kx_PUBLICKEYBYTES, "pk must be 'crypto_kx_PUBLICKEYBYTES' bytes")
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13 | assert(sk.byteLength === crypto_kx_SECRETKEYBYTES, "sk must be 'crypto_kx_SECRETKEYBYTES' bytes")
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14 |
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15 | randombytes_buf(sk, crypto_kx_SECRETKEYBYTES)
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16 | return crypto_scalarmult_base(pk, sk)
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17 | }
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18 |
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19 | function crypto_kx_seed_keypair (pk, sk, seed) {
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20 | assert(pk.byteLength === crypto_kx_PUBLICKEYBYTES, "pk must be 'crypto_kx_PUBLICKEYBYTES' bytes")
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21 | assert(sk.byteLength === crypto_kx_SECRETKEYBYTES, "sk must be 'crypto_kx_SECRETKEYBYTES' bytes")
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22 | assert(seed.byteLength === crypto_kx_SEEDBYTES, "seed must be 'crypto_kx_SEEDBYTES' bytes")
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23 |
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24 | crypto_generichash(sk, seed)
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25 | return crypto_scalarmult_base(pk, sk)
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26 | }
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27 |
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28 | module.exports = {
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29 | crypto_kx_keypair,
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30 | crypto_kx_seed_keypair,
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31 | crypto_kx_SEEDBYTES,
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32 | crypto_kx_SECRETKEYBYTES,
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33 | crypto_kx_PUBLICKEYBYTES
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34 | }
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