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Chachapoly new bearssl fixes

This commit is contained in:
Giovanni Petrantoni 2020-04-07 17:52:19 +09:00
parent f7af2c2e5c
commit a576069305
1 changed files with 10 additions and 14 deletions
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24
libp2p/crypto/chacha20poly1305.nim
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@ -17,6 +17,12 @@
import bearssl import bearssl
# have to do this due to a nim bug and raises[] on callbacks
proc ourPoly1305CtmulRun*(key: pointer; iv: pointer; data: pointer; len: int;
aad: pointer; aadLen: int; tag: pointer; ichacha: pointer;
encrypt: cint) {.cdecl, importc: "br_poly1305_ctmul_run",
header: "bearssl_block.h".}
const const
ChaChaPolyKeySize = 32 ChaChaPolyKeySize = 32
ChaChaPolyNonceSize = 12 ChaChaPolyNonceSize = 12
@ -44,27 +50,19 @@ proc intoChaChaPolyTag*(s: openarray[byte]): ChaChaPolyTag =
# this is reconciled at runtime # this is reconciled at runtime
# we do this in the global scope / module init # we do this in the global scope / module init
template fetchImpl: untyped =
# try for the best first
let
chachapoly_native_impl {.inject.}: Poly1305Run = poly1305CtmulRun
chacha_native_impl {.inject.}: Chacha20Run = chacha20CtRun
proc encrypt*(_: type[ChaChaPoly], proc encrypt*(_: type[ChaChaPoly],
key: ChaChaPolyKey, key: ChaChaPolyKey,
nonce: ChaChaPolyNonce, nonce: ChaChaPolyNonce,
tag: var ChaChaPolyTag, tag: var ChaChaPolyTag,
data: var openarray[byte], data: var openarray[byte],
aad: openarray[byte]) = aad: openarray[byte]) =
fetchImpl()
let let
ad = if aad.len > 0: ad = if aad.len > 0:
unsafeaddr aad[0] unsafeaddr aad[0]
else: else:
nil nil
chachapoly_native_impl( ourPoly1305CtmulRun(
unsafeaddr key[0], unsafeaddr key[0],
unsafeaddr nonce[0], unsafeaddr nonce[0],
addr data[0], addr data[0],
@ -72,7 +70,7 @@ proc encrypt*(_: type[ChaChaPoly],
ad, ad,
aad.len, aad.len,
addr tag[0], addr tag[0],
chacha_native_impl, chacha20CtRun,
#[encrypt]# 1.cint) #[encrypt]# 1.cint)
proc decrypt*(_: type[ChaChaPoly], proc decrypt*(_: type[ChaChaPoly],
@ -81,15 +79,13 @@ proc decrypt*(_: type[ChaChaPoly],
tag: var ChaChaPolyTag, tag: var ChaChaPolyTag,
data: var openarray[byte], data: var openarray[byte],
aad: openarray[byte]) = aad: openarray[byte]) =
fetchImpl()
let let
ad = if aad.len > 0: ad = if aad.len > 0:
unsafeaddr aad[0] unsafeaddr aad[0]
else: else:
nil nil
chachapoly_native_impl( ourPoly1305CtmulRun(
unsafeaddr key[0], unsafeaddr key[0],
unsafeaddr nonce[0], unsafeaddr nonce[0],
addr data[0], addr data[0],
@ -97,5 +93,5 @@ proc decrypt*(_: type[ChaChaPoly],
ad, ad,
aad.len, aad.len,
addr tag[0], addr tag[0],
chacha_native_impl, chacha20CtRun,
#[decrypt]# 0.cint) #[decrypt]# 0.cint)