[dpdk-dev] [PATCH v4 1/2] cryptodev: add chacha20-poly1305 aead algorithm

[Arek Kusztal]

This patch adds Chacha20-Poly1305 AEAD algorithm to Cryptodev.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal at intel.com>
Acked-by: Fiona Trahe <fiona.trahe at intel.com>
Acked-by: Anoob Joseph <anoobj at marvell.com>
Acked-by: Akhil Goyal <akhil.goyal at nxp.com>
---
v3:
- rebased against 20.05
v4:
- rebased again against 20.05

 doc/guides/cryptodevs/features/default.ini | 13 +++++++------
 doc/guides/rel_notes/release_20_05.rst     |  4 ++++
 lib/librte_cryptodev/rte_crypto_sym.h      |  9 +++++++++
 lib/librte_cryptodev/rte_cryptodev.c       |  1 +
 4 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/doc/guides/cryptodevs/features/default.ini b/doc/guides/cryptodevs/features/default.ini
index 118479d..800bcf8 100644
--- a/doc/guides/cryptodevs/features/default.ini
+++ b/doc/guides/cryptodevs/features/default.ini
@@ -95,12 +95,13 @@ SHA3_512 HMAC   =
 ; Supported AEAD algorithms of a default crypto driver.
 ;
 [AEAD]
-AES GCM (128) =
-AES GCM (192) =
-AES GCM (256) =
-AES CCM (128) =
-AES CCM (192) =
-AES CCM (256) =
+AES GCM (128)     =
+AES GCM (192)     =
+AES GCM (256)     =
+AES CCM (128)     =
+AES CCM (192)     =
+AES CCM (256)     =
+CHACHA20-POLY1305 =
 ;
 ; Supported Asymmetric algorithms of a default crypto driver.
 ;
diff --git a/doc/guides/rel_notes/release_20_05.rst b/doc/guides/rel_notes/release_20_05.rst
index b124c3f..88396e8 100644
--- a/doc/guides/rel_notes/release_20_05.rst
+++ b/doc/guides/rel_notes/release_20_05.rst
@@ -212,6 +212,10 @@ New Features
   * Added IPsec inbound load-distribution support for ipsec-secgw application
     using NIC load distribution feature(Flow Director).
 
+* **Added Chacha20-Poly1305 algorithm to Cryptodev API.**
+
+  Chacha20-Poly1305 AEAD algorithm can now be supported in Cryptodev.
+
 
 Removed Items
 -------------
diff --git a/lib/librte_cryptodev/rte_crypto_sym.h b/lib/librte_cryptodev/rte_crypto_sym.h
index 9e887c1..d9585ec 100644
--- a/lib/librte_cryptodev/rte_crypto_sym.h
+++ b/lib/librte_cryptodev/rte_crypto_sym.h
@@ -409,6 +409,8 @@ enum rte_crypto_aead_algorithm {
 	/**< AES algorithm in CCM mode. */
 	RTE_CRYPTO_AEAD_AES_GCM,
 	/**< AES algorithm in GCM mode. */
+	RTE_CRYPTO_AEAD_CHACHA20_POLY1305,
+	/**< Chacha20 cipher with poly1305 authenticator */
 	RTE_CRYPTO_AEAD_LIST_END
 };
 
@@ -452,6 +454,11 @@ struct rte_crypto_aead_xform {
 		 * be allocated, even though the length field will
 		 * have a value less than this.
 		 *
+		 * - For Chacha20-Poly1305 it is 96-bit nonce.
+		 * PMD sets initial counter for Poly1305 key generation
+		 * part to 0 and for Chacha20 encryption to 1 as per
+		 * rfc8439 2.8. AEAD construction.
+		 *
 		 * For optimum performance, the data pointed to SHOULD
 		 * be 8-byte aligned.
 		 */
@@ -468,6 +475,8 @@ struct rte_crypto_aead_xform {
 		 *
 		 * - For CCM mode, this is the length of the nonce,
 		 * which can be in the range 7 to 13 inclusive.
+		 *
+		 * - For Chacha20-Poly1305 this field is always 12.
 		 */
 	} iv;	/**< Initialisation vector parameters */
 
diff --git a/lib/librte_cryptodev/rte_cryptodev.c b/lib/librte_cryptodev/rte_cryptodev.c
index 7693eb6..a499c47 100644
--- a/lib/librte_cryptodev/rte_cryptodev.c
+++ b/lib/librte_cryptodev/rte_cryptodev.c
@@ -152,6 +152,7 @@ const char *
 rte_crypto_aead_algorithm_strings[] = {
 	[RTE_CRYPTO_AEAD_AES_CCM]	= "aes-ccm",
 	[RTE_CRYPTO_AEAD_AES_GCM]	= "aes-gcm",
+	[RTE_CRYPTO_AEAD_CHACHA20_POLY1305] = "chacha20-poly1305"
 };
 
 /**
-- 
2.1.0