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crypto: chacha20poly1305 - Add a ChaCha20-Poly1305 AEAD construction, RFC7539

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This AEAD uses a chacha20 ablkcipher and a poly1305 ahash to construct the
ChaCha20-Poly1305 AEAD as defined in RFC7539. It supports both synchronous and
asynchronous operations, even if we currently have no async chacha20 or poly1305
drivers.

Signed-off-by: Martin Willi <martin@strongswan.org>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Martin Willi
2015-06-01 13:44:00 +02:00
committed by Herbert Xu
parent eee9dc6162
commit 71ebc4d1b2
3 changed files with 676 additions and 0 deletions
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12
crypto/Kconfig
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@@ -217,6 +217,18 @@ config CRYPTO_GCM
Support for Galois/Counter Mode (GCM) and Galois Message
Authentication Code (GMAC). Required for IPSec.
config CRYPTO_CHACHA20POLY1305
tristate "ChaCha20-Poly1305 AEAD support"
select CRYPTO_CHACHA20
select CRYPTO_POLY1305
select CRYPTO_AEAD
help
ChaCha20-Poly1305 AEAD support, RFC7539.
Support for the AEAD wrapper using the ChaCha20 stream cipher combined
with the Poly1305 authenticator. It is defined in RFC7539 for use in
IETF protocols.
config CRYPTO_SEQIV
tristate "Sequence Number IV Generator"
select CRYPTO_AEAD

1
crypto/Makefile
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@@ -59,6 +59,7 @@ obj-$(CONFIG_CRYPTO_XTS) += xts.o
obj-$(CONFIG_CRYPTO_CTR) += ctr.o
obj-$(CONFIG_CRYPTO_GCM) += gcm.o
obj-$(CONFIG_CRYPTO_CCM) += ccm.o
obj-$(CONFIG_CRYPTO_CHACHA20POLY1305) += chacha20poly1305.o
obj-$(CONFIG_CRYPTO_PCRYPT) += pcrypt.o
obj-$(CONFIG_CRYPTO_CRYPTD) += cryptd.o
obj-$(CONFIG_CRYPTO_MCRYPTD) += mcryptd.o

663
crypto/chacha20poly1305.c Normal file
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