Add PSA config for ChaCha20
Add checks for PSA_WANT_KEY_TYPE_CHACHA20, both with and without
MBEDTLS_PSA_CRYPTO_CONFIG.  This only adds support for the ciphers
itself, presumably as a stream cipher (and not yet AEAD).
@@ -266,6 +266,13 @@ extern "C" {
#endif /*!MBEDTLS_PSA_ACCEL_KEY_TYPE_DES || PSA_HAVE_SOFT_BLOCK_MODE */
#endif /* PSA_WANT_KEY_TYPE_DES */
+#if defined(PSA_WANT_KEY_TYPE_CHACHA20)
+#if !defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_CHACHA20)
+#define MBEDTLS_PSA_BUILTIN_KEY_TYPE_CHACHA20 1
+#define MBEDTLS_CHACHA20_C
+#endif /*!MBEDTLS_PSA_ACCEL_KEY_TYPE_CHACHA20 */
+#endif /* PSA_WANT_KEY_TYPE_CHACHA20 */
+
#if defined(PSA_WANT_ALG_STREAM_CIPHER)
#define MBEDTLS_PSA_BUILTIN_ALG_STREAM_CIPHER 1
#endif /* PSA_WANT_ALG_STREAM_CIPHER */
@@ -483,6 +490,13 @@ extern "C" {
#define MBEDTLS_PSA_BUILTIN_KEY_TYPE_DES 1
#endif
+#if defined(MBEDTLS_CHACHA20_C)
+#define PSA_WANT_KEY_TYPE_CHACHA20 1
+#define PSA_WANT_ALG_STREAM_CIPHER 1
+#define MBEDTLS_PSA_BUILTIN_KEY_TYPE_CHACHA20 1
+#define MBEDTLS_PSA_BUILTIN_ALG_STREAM_CIPHER 1
+#endif
+
#if defined(MBEDTLS_CIPHER_MODE_CBC)
#define PSA_WANT_ALG_CBC_NO_PADDING 1
#if defined(MBEDTLS_CIPHER_PADDING_PKCS7)
