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keep using doAssert in ecdh with default hash function and add some documentation for both ecdh functions

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jangko 2023-04-20 15:00:51 +07:00
parent 206e5360b8
commit b3f38e2795
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GPG Key ID: 31702AE10541E6B9
1 changed files with 9 additions and 5 deletions
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secp256k1.nim
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@ -601,19 +601,23 @@ func recover*(sig: SkRecoverableSignature, msg: SkMessage): SkResult[SkPublicKey
ok(SkPublicKey(data: data))
func ecdh*(seckey: SkSecretKey, pubkey: SkPublicKey): SkResult[SkEcdhSecret] =
func ecdh*(seckey: SkSecretKey, pubkey: SkPublicKey): SkEcdhSecret =
## Calculate ECDH shared secret.
## Default hash function and `requiresInit` should prevent this function
## from failing.
var secret {.noinit.}: array[SkEdchSecretSize, byte]
if secp256k1_ecdh(
let res = secp256k1_ecdh(
secp256k1_context_no_precomp, secret.baseAddr, unsafeAddr pubkey.data,
seckey.data.baseAddr) != 1:
return err("cannot compute ECDH secret, keys invalid?")
seckey.data.baseAddr)
doAssert res == 1, "cannot compute ECDH secret, keys invalid?"
ok(SkEcdhSecret(data: secret))
SkEcdhSecret(data: secret)
func ecdh*[N: static[int]](seckey: SkSecretKey, pubkey: SkPublicKey,
hashfn: SkEcdhHashFunc, data: pointer): SkResult[array[N, byte]] =
## Calculate ECDH shared secret using custom hash function.
## This function may fail if the custom hash function return zero
## although other inputs have been initialized properly.
var secret {.noinit.}: array[N, byte]
if secp256k1_ecdh(
secp256k1_context_no_precomp, secret.baseAddr, unsafeAddr pubkey.data,