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crypto: add ARMv8 AES-IGE decrypt fast path #1808

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Merged
ernado merged 2 commits into from
Jul 14, 2026
Merged

crypto: add ARMv8 AES-IGE decrypt fast path #1808

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046ff0e
perf(crypto): add ARMv8 AES-IGE decrypt fast path
fatshotty Jun 30, 2026
96a39f8
refactor(crypto): use ige AES-256 decrypt helper
fatshotty Jul 14, 2026
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8 changes: 1 addition & 7 deletions crypto/cipher_decrypt.go
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Original file line number Diff line number Diff line change
@@ -1,8 +1,6 @@
package crypto

import (
"crypto/aes"

"github.com/go-faster/errors"

"github.com/gotd/ige"
Expand Down Expand Up @@ -72,12 +70,8 @@ func (c Cipher) decryptMessage(k AuthKey, encrypted *EncryptedMessage) ([]byte,
}

key, iv := Keys(k.Value, encrypted.MsgKey, c.encryptSide.DecryptSide())
cipher, err := aes.NewCipher(key[:])
if err != nil {
return nil, err
}
plaintext := make([]byte, len(encrypted.EncryptedData))
ige.DecryptBlocks(cipher, iv[:], plaintext, encrypted.EncryptedData)
ige.DecryptAES256Blocks(key[:], iv[:], plaintext, encrypted.EncryptedData)

return plaintext, nil
}
2 changes: 1 addition & 1 deletion go.mod
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Expand Up @@ -13,7 +13,7 @@ require (
github.com/go-openapi/inflect v0.21.6
github.com/google/uuid v1.6.0
github.com/gotd/getdoc v0.53.0
github.com/gotd/ige v0.2.2
github.com/gotd/ige v0.3.0
github.com/gotd/log v0.1.0
github.com/gotd/log/logzap v0.1.1
github.com/gotd/neo v0.1.5
Expand Down
5 changes: 2 additions & 3 deletions go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,6 @@ github.com/go-faster/jx v1.2.0 h1:T2YHJPrFaYu21fJtUxC9GzmluKu8rVIFDwwGBKTDseI=
github.com/go-faster/jx v1.2.0/go.mod h1:UWLOVDmMG597a5tBFPLIWJdUxz5/2emOpfsj9Neg0PE=
github.com/go-faster/sdk v0.34.0 h1:fDqrfjdNAZ/gu1yaAxGgEatguVjHhO0bfoQrDnp7gM4=
github.com/go-faster/sdk v0.34.0/go.mod h1:B9UTh3g1aku6MuNJlO5v0AgJX3W6tzQuzGZEkK3aBmM=
github.com/go-faster/xor v0.3.0/go.mod h1:x5CaDY9UKErKzqfRfFZdfu+OSTfoZny3w5Ak7UxcipQ=
github.com/go-faster/xor v1.0.0 h1:2o8vTOgErSGHP3/7XwA5ib1FTtUsNtwCoLLBjl31X38=
github.com/go-faster/xor v1.0.0/go.mod h1:x5CaDY9UKErKzqfRfFZdfu+OSTfoZny3w5Ak7UxcipQ=
github.com/go-faster/yaml v0.4.6 h1:lOK/EhI04gCpPgPhgt0bChS6bvw7G3WwI8xxVe0sw9I=
Expand All @@ -52,8 +51,8 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/gotd/getdoc v0.53.0 h1:jO3QEFPM8oz9PAcMMXAjB2sVqSOeYUrUNcPvGyAGG/4=
github.com/gotd/getdoc v0.53.0/go.mod h1:dGzxEXIknZKAjGTbm9Axgx5LJqR/FBvHkoaPfnstmNw=
github.com/gotd/ige v0.2.2 h1:XQ9dJZwBfDnOGSTxKXBGP4gMud3Qku2ekScRjDWWfEk=
github.com/gotd/ige v0.2.2/go.mod h1:tuCRb+Y5Y3eNTo3ypIfNpQ4MFjrnONiL2jN2AKZXmb0=
github.com/gotd/ige v0.3.0 h1:4f6LEHWsVDLBG0bT9wWG2/9TZb5aWm265G8ZlTXmRRU=
github.com/gotd/ige v0.3.0/go.mod h1:FE9bTaQtvfArizAcZuI4sS6gXaEUBmixdUufVHoCKac=
github.com/gotd/log v0.1.0 h1:4LJUEvafD1xtBwx2QkrlzFnRgbYXTlWqJPDi8BvrLbU=
github.com/gotd/log v0.1.0/go.mod h1:5ilhdu1Ux0QvDY/FF3Ojfw24Ws3SlCtyLwOpXy8KYXs=
github.com/gotd/log/logzap v0.1.1 h1:O6l7d8HUbODe+UMcrM47eXYDwdJ6RNmpQejLjrlcEIQ=
Expand Down
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