Make sure we handle input NULL with length 0

[openssl.git] / providers / implementations / ciphers / cipher_chacha20_poly1305.c

diff --git a/providers/implementations/ciphers/cipher_chacha20_poly1305.c b/providers/implementations/ciphers/cipher_chacha20_poly1305.c
index b92d8d545eeefff6ae96f589194621e2ba470798..6bf88dbd9e6ba99ecc9d4eac2a1dacb295ea6e3c 100644 (file)
--- a/providers/implementations/ciphers/cipher_chacha20_poly1305.c
+++ b/providers/implementations/ciphers/cipher_chacha20_poly1305.c
@@ -262,6 +262,11 @@ static int chacha20_poly1305_cipher(void *vctx, unsigned char *out,
     PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
         (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
 
+    if (inl == 0) {
+        *outl = 0;
+        return 1;
+    }
+
     if (outsize < inl) {
         ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
         return 0;