Fix BIO_printf format warnings

[oweals/openssl.git] / crypto / hmac / hm_ameth.c

diff --git a/crypto/hmac/hm_ameth.c b/crypto/hmac/hm_ameth.c
index b786db07aa2c1d4f2f47f2866f6eadb7a6b34807..f0a5bc9a01d2a2d9b142b21ddd6e082f6ff364de 100644 (file)
--- a/crypto/hmac/hm_ameth.c
+++ b/crypto/hmac/hm_ameth.c
@@ -1,7 +1,7 @@
 /*
  * Copyright 2007-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
- * Licensed under the OpenSSL license (the "License").  You may not use
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
@@ -72,6 +72,25 @@ static int hmac_set_priv_key(EVP_PKEY *pkey, const unsigned char *priv,
     return 1;
 }
 
+static int hmac_get_priv_key(const EVP_PKEY *pkey, unsigned char *priv,
+                             size_t *len)
+{
+    ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
+
+    if (priv == NULL) {
+        *len = ASN1_STRING_length(os);
+        return 1;
+    }
+
+    if (os == NULL || *len < (size_t)ASN1_STRING_length(os))
+        return 0;
+
+    *len = ASN1_STRING_length(os);
+    memcpy(priv, ASN1_STRING_get0_data(os), *len);
+
+    return 1;
+}
+
 const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = {
     EVP_PKEY_HMAC,
     EVP_PKEY_HMAC,
@@ -103,4 +122,6 @@ const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = {
 
     hmac_set_priv_key,
     NULL,
+    hmac_get_priv_key,
+    NULL,
 };