5 files changed, 41 insertions, 2 deletions
diff --git a/lib/crypto/c_src/algorithms.c b/lib/crypto/c_src/algorithms.c
index 6318c8ad5a..a5bf248ea0 100644
--- a/lib/crypto/c_src/algorithms.c
+++ b/lib/crypto/c_src/algorithms.c
@@ -21,7 +21,7 @@
 #include "algorithms.h"
 
 static unsigned int algo_hash_cnt, algo_hash_fips_cnt;
-static ERL_NIF_TERM algo_hash[12];   /* increase when extending the list */
+static ERL_NIF_TERM algo_hash[14];   /* increase when extending the list */
 static unsigned int algo_pubkey_cnt, algo_pubkey_fips_cnt;
 static ERL_NIF_TERM algo_pubkey[12]; /* increase when extending the list */
 static unsigned int algo_cipher_cnt, algo_cipher_fips_cnt;
@@ -62,6 +62,11 @@ void init_algorithms_types(ErlNifEnv* env)
 #ifdef HAVE_SHA3_512
     algo_hash[algo_hash_cnt++] = enif_make_atom(env, "sha3_512");
 #endif
+#ifdef HAVE_BLAKE2
+    algo_hash[algo_hash_cnt++] = enif_make_atom(env, "blake2b");
+    algo_hash[algo_hash_cnt++] = enif_make_atom(env, "blake2s");
+#endif
+
     // Non-validated algorithms follow
     algo_hash_fips_cnt = algo_hash_cnt;
     algo_hash[algo_hash_cnt++] = enif_make_atom(env, "md4");
@@ -136,7 +141,7 @@ void init_algorithms_types(ErlNifEnv* env)
 #if defined(HAVE_CHACHA20)
     algo_cipher[algo_cipher_cnt++] = enif_make_atom(env,"chacha20");
 #endif
- 
+
     // Validated algorithms first
     algo_mac_cnt = 0;
     algo_mac[algo_mac_cnt++] = enif_make_atom(env,"hmac");
diff --git a/lib/crypto/c_src/atoms.c b/lib/crypto/c_src/atoms.c
index 3a028b9a67..5f19327197 100644
--- a/lib/crypto/c_src/atoms.c
+++ b/lib/crypto/c_src/atoms.c
@@ -110,6 +110,11 @@ ERL_NIF_TERM atom_sha3_512;
 ERL_NIF_TERM atom_md5;
 ERL_NIF_TERM atom_ripemd160;
 
+#ifdef HAVE_BLAKE2
+ERL_NIF_TERM atom_blake2b;
+ERL_NIF_TERM atom_blake2s;
+#endif
+
 #ifdef HAS_ENGINE_SUPPORT
 ERL_NIF_TERM atom_bad_engine_method;
 ERL_NIF_TERM atom_bad_engine_id;
@@ -239,6 +244,10 @@ int init_atoms(ErlNifEnv *env, const ERL_NIF_TERM fips_mode, const ERL_NIF_TERM
     atom_sha3_512 = enif_make_atom(env,"sha3_512");
     atom_md5 = enif_make_atom(env,"md5");
     atom_ripemd160 = enif_make_atom(env,"ripemd160");
+#ifdef HAVE_BLAKE2
+    atom_blake2b = enif_make_atom(env,"blake2b");
+    atom_blake2s = enif_make_atom(env,"blake2s");
+#endif
 
 #ifdef HAS_ENGINE_SUPPORT
     atom_bad_engine_method = enif_make_atom(env,"bad_engine_method");
diff --git a/lib/crypto/c_src/atoms.h b/lib/crypto/c_src/atoms.h
index 9ddf0131ac..32f5ec856c 100644
--- a/lib/crypto/c_src/atoms.h
+++ b/lib/crypto/c_src/atoms.h
@@ -113,6 +113,10 @@ extern ERL_NIF_TERM atom_sha3_384;
 extern ERL_NIF_TERM atom_sha3_512;
 extern ERL_NIF_TERM atom_md5;
 extern ERL_NIF_TERM atom_ripemd160;
+#ifdef HAVE_BLAKE2
+extern ERL_NIF_TERM atom_blake2b;
+extern ERL_NIF_TERM atom_blake2s;
+#endif
 
 #ifdef HAS_ENGINE_SUPPORT
 extern ERL_NIF_TERM atom_bad_engine_method;
diff --git a/lib/crypto/c_src/digest.c b/lib/crypto/c_src/digest.c
index 00ba65bf54..fec286c000 100644
--- a/lib/crypto/c_src/digest.c
+++ b/lib/crypto/c_src/digest.c
@@ -82,6 +82,20 @@ static struct digest_type_t digest_types[] =
      {NULL}
 #endif
     },
+    {{"blake2b"},
+#ifdef HAVE_BLAKE2
+     {&EVP_blake2b512}
+#else
+     {NULL}
+#endif
+    },
+    {{"blake2s"},
+#ifdef HAVE_BLAKE2
+     {&EVP_blake2s256}
+#else
+     {NULL}
+#endif
+    },
 
     {{NULL}, {NULL}}
 };
diff --git a/lib/crypto/c_src/openssl_config.h b/lib/crypto/c_src/openssl_config.h
index c0ce1a59fe..45144a0c25 100644
--- a/lib/crypto/c_src/openssl_config.h
+++ b/lib/crypto/c_src/openssl_config.h
@@ -158,6 +158,13 @@
 #  define HAVE_SHA3_512
 # endif
 
+// BLAKE2:
+#if OPENSSL_VERSION_NUMBER >= PACKED_OPENSSL_VERSION_PLAIN(1,1,1) \
+    && !defined(HAS_LIBRESSL) \
+    && !defined(OPENSSL_NO_BLAKE2)
+# define HAVE_BLAKE2
+#endif
+
 #if OPENSSL_VERSION_NUMBER >= PACKED_OPENSSL_VERSION(0,9,8,'o') \
 	&& !defined(OPENSSL_NO_EC) \
 	&& !defined(OPENSSL_NO_ECDH) \