diff -up dovecot-2.3.14/src/lib-dcrypt/dcrypt-openssl.c.opensslv3 dovecot-2.3.14/src/lib-dcrypt/dcrypt-openssl.c

--- dovecot-2.3.14/src/lib-dcrypt/dcrypt-openssl.c.opensslv3	2021-06-03 18:56:52.573174433 +0200

+++ dovecot-2.3.14/src/lib-dcrypt/dcrypt-openssl.c	2021-06-03 18:56:52.585174274 +0200

@@ -73,10 +73,30 @@

   2<tab>key algo oid<tab>1<tab>symmetric algo name<tab>salt<tab>hash algo<tab>rounds<tab>E(RSA = i2d_PrivateKey, EC=Private Point)<tab>key id

 **/

+#if OPENSSL_VERSION_MAJOR == 3

+static EC_KEY *EVP_PKEY_get0_EC_KEYv3(EVP_PKEY *key)

+{

+  EC_KEY *eck = EVP_PKEY_get1_EC_KEY(key);

+  EVP_PKEY_set1_EC_KEY(key, eck);

+  EC_KEY_free(eck);

+  return eck;

+}

+

+static EC_KEY *EVP_PKEY_get1_EC_KEYv3(EVP_PKEY *key)

+{

+  EC_KEY *eck = EVP_PKEY_get1_EC_KEY(key);

+  EVP_PKEY_set1_EC_KEY(key, eck);

+  return eck;

+}

+

+#define EVP_PKEY_get0_EC_KEY EVP_PKEY_get0_EC_KEYv3 

+#define EVP_PKEY_get1_EC_KEY EVP_PKEY_get1_EC_KEYv3

+#else

 #ifndef HAVE_EVP_PKEY_get0

 #define EVP_PKEY_get0_EC_KEY(x) x->pkey.ec

 #define EVP_PKEY_get0_RSA(x) x->pkey.rsa

 #endif

+#endif

 #ifndef HAVE_OBJ_LENGTH

 #define OBJ_length(o) ((o)->length)