mirror of
https://github.com/QuilibriumNetwork/ceremonyclient.git
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dbd95bd9e9
* v2.1.0 [omit consensus and adjacent] - this commit will be amended with the full release after the file copy is complete * 2.1.0 main node rollup
63 lines
2.2 KiB
Go
63 lines
2.2 KiB
Go
// -*- go -*-
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// This example computes HMAC-SHA256 where the HMAC key is shared as
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// two random shares between garbler and evaluator. The garbler's key
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// share is:
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//
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// keyG: 4de216d2fdc9301e5b9c78486f7109a05670d200d9e2f275ec0aad08ec42af47
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// fcb59bf460d50b01333a748f3a9efb13e08036d49a26c21ba2e33a5f8a2cf0e7
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//
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// The evaluator's key share is:
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//
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// keyE: f87a00ef89c2396de32f6ac0748f6fa1b641013d46f74ce25cc625904215a675
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// 01c0c7196a2602f6516527958a82271847933c35d170d98bfdb04d2ddf3bb197
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//
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// The final HMAC key is keyG ^ keyE:
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//
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// key : b598163d740b0973b8b312881bfe6601e031d33d9f15be97b0cc8898ae570932
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// fd755ced0af309f7625f531ab01cdc0ba7130ae14b561b905f53777255174170
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//
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// The example uses 32-byte messages (Garbler.msg) so with the message:
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//
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// msg : Hello, world!...................
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// hex : 48656c6c6f2c20776f726c64212e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e
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//
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// We expect to get the following HMAC-SHA256 output:
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//
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// sum : 89c648c4d7b4220f6767706dec64f69bbdb2725d062a09a447b9cf32af8636ee8853f92ca59c0e81712b72c79f3503f7f2131d20c7a5dfae87b79f839cecf2c4
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//
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// Now we can run the MPC computation as follows. First, run the
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// evaluator with one input: the evaluator's key share:
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//
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// ./garbled -e -v -i 0xf87a00ef89c2396de32f6ac0748f6fa1b641013d46f74ce25cc625904215a67501c0c7196a2602f6516527958a82271847933c35d170d98bfdb04d2ddf3bb197 examples/hmac-sha512.qcl
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//
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// The garbler takes two inputs: the message and the garbler's key
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// share:
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//
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// ./garbled -v -i 0x48656c6c6f2c20776f726c64212e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e,0x4de216d2fdc9301e5b9c78486f7109a05670d200d9e2f275ec0aad08ec42af47fcb59bf460d50b01333a748f3a9efb13e08036d49a26c21ba2e33a5f8a2cf0e7 examples/hmac-sha512.qcl
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//
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// The MCP computation providers the expected HMAC result:
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//
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// Result[0]: 89c648c4d7b4220f6767706dec64f69bbdb2725d062a09a447b9cf32af8636ee8853f92ca59c0e81712b72c79f3503f7f2131d20c7a5dfae87b79f839cecf2c4
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package main
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import (
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"crypto/hmac"
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)
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type Garbler struct {
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msg []byte
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keyShare [64]byte
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}
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func main(g Garbler, eKeyShare [64]byte) []byte {
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var key [64]byte
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for i := 0; i < len(key); i++ {
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key[i] = g.keyShare[i] ^ eKeyShare[i]
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}
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return hmac.SumSHA512(g.msg, key)
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}
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