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update pedersen hash reference URL #19

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update pedersen hash reference URL #19

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12 changes: 6 additions & 6 deletions src/starkware/crypto/ffi/crypto_lib/crypto_lib.go
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Original file line number Diff line number Diff line change
@@ -1,10 +1,12 @@
package crypto_lib

import "encoding/hex"
import (
"encoding/hex"
"fmt"
"math/big"
"unsafe"
)

/*

#cgo CFLAGS: -I.
Expand All @@ -15,8 +17,6 @@ import (

*/
import "C"
import "unsafe"


const curveOrder = "800000000000010ffffffffffffffffb781126dcae7b2321e66a241adc64d2f"

Expand All @@ -40,8 +40,8 @@ func reverseHexEndianRepresentation(s string) string {
rns := []rune(s)
for i, j := 0, len(rns)-2; i < j; i, j = i+2, j-2 {
rns[i], rns[j] = rns[j], rns[i]
rns[i+1], rns[j+1] = rns[j+1], rns[i+1]
}
rns[i+1], rns[j+1] = rns[j+1], rns[i+1]
}
return string(rns)
}

Expand All @@ -56,7 +56,7 @@ func padHexString(s string) string {
/*
Computes the StarkWare version of the Pedersen hash of x and y.
Full specification of the hash function can be found here:
https://docs.starkware.co/starkex-docs/crypto/pedersen-hash-function
https://docs.starkware.co/starkex/pedersen-hash-function.html
*/
func Hash(input1, input2 string) string {
input1_dec, _ := hex.DecodeString(reverseHexEndianRepresentation(input1))
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2 changes: 1 addition & 1 deletion src/starkware/crypto/ffi/js/crypto.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ const curveOrder = new BN('800000000000010ffffffffffffffffb781126dcae7b2321e66a2
/*
Computes the StarkWare version of the Pedersen hash of x and y.
Full specification of the hash function can be found here:
https://docs.starkware.co/starkex-docs/crypto/pedersen-hash-function
https://docs.starkware.co/starkex/pedersen-hash-function.html
*/
function pedersen(x, y) {
const x_buf = BigIntBuffer.toBufferLE(x, 32);
Expand Down