[dpdk-dev] [PATCH] cryptodev: add chacha20-poly1305 aead algorithm

[Arek Kusztal]

This patch adds Chacha20-Poly1305 AEAD algorithm to Cryptodev.

Signed-off-by: Arek Kusztal <arkadiuszx.kusz...@intel.com>
---
 doc/guides/cryptodevs/features/default.ini | 13 +++++++------
 doc/guides/rel_notes/release_19_11.rst     |  4 ++++
 lib/librte_cryptodev/rte_crypto_sym.h      |  9 +++++++++
 3 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/doc/guides/cryptodevs/features/default.ini 
b/doc/guides/cryptodevs/features/default.ini
index b7f9a0a..2a3ff48 100644
--- a/doc/guides/cryptodevs/features/default.ini
+++ b/doc/guides/cryptodevs/features/default.ini
@@ -93,12 +93,13 @@ 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_19_11.rst 
b/doc/guides/rel_notes/release_19_11.rst
index 48c80e5..d07a396 100644
--- a/doc/guides/rel_notes/release_19_11.rst
+++ b/doc/guides/rel_notes/release_19_11.rst
@@ -315,6 +315,10 @@ New Features
     "--iova-mode=pa" option can be used, IOVA_DC bus iommu scheme can also
     result in IOVA as PA.
 
+* **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 ffa038d..bc356f6 100644
--- a/lib/librte_cryptodev/rte_crypto_sym.h
+++ b/lib/librte_cryptodev/rte_crypto_sym.h
@@ -348,6 +348,8 @@ 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
 };
 
@@ -391,6 +393,11 @@ 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.
                 */
@@ -407,6 +414,8 @@ 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 */
 
-- 
2.1.0