Add EVP_AEAD_CTX_init(3) manpage to document the new(ish) AEAD API.

The "authenticated encryption with additional data" API is used for
ciphers like AES-GCM or ChaCha20-Poly1305.  The manpage is a beginning
and certainly needs more work, especially improvements in the EXAMPLES
section.

Based on agl's source code comments.
Converted from pod to mandoc by schwarze@

OK schwarze@ jsing@

1 files changed, 4 insertions, 0 deletions

diff --git a/src/lib/libcrypto/doc/evp.pod b/src/lib/libcrypto/doc/evp.pod
index 57c761d01f..dfd96d3b98 100644
--- a/src/lib/libcrypto/doc/evp.pod
+++ b/src/lib/libcrypto/doc/evp.pod
@@ -25,6 +25,9 @@ functions.
 Symmetric encryption is available with the L<B<EVP_Encrypt>I<...>|EVP_EncryptInit(3)>
 functions.  The L<B<EVP_Digest>I<...>|EVP_DigestInit(3)> functions provide message digests.
 
+Authenticated encryption with additional data (AEAD) is available with
+the L<B<EVP_AEAD>I<...>|EVP_AEAD_CTX_init(3)> functions.
+
 The B<EVP_PKEY>I<...> functions provide a high level interface to
 asymmetric algorithms. To create a new EVP_PKEY see
 L<EVP_PKEY_new(3)|EVP_PKEY_new(3)>. EVP_PKEYs can be associated
@@ -81,6 +84,7 @@ using the high level interface.
 
 L<EVP_DigestInit(3)|EVP_DigestInit(3)>,
 L<EVP_EncryptInit(3)|EVP_EncryptInit(3)>,
+L<EVP_AEAD_CTX_init(3)|EVP_AEAD_CTX_init(3)>,
 L<EVP_OpenInit(3)|EVP_OpenInit(3)>,
 L<EVP_SealInit(3)|EVP_SealInit(3)>,
 L<EVP_DigestSignInit(3)|EVP_DigestSignInit(3)>,