poly1305: Properly copy the whole context on dup

Also reset the updated flag when Poly1305_Init is called.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18143)

(cherry picked from commit bbe909d00e9a593bd5954dfca4d3020467977565)

1 files changed, 3 insertions, 2 deletions

diff --git a/providers/implementations/macs/poly1305_prov.c b/providers/implementations/macs/poly1305_prov.c
index ad67216d2a..28789d25c8 100644
--- a/providers/implementations/macs/poly1305_prov.c
+++ b/providers/implementations/macs/poly1305_prov.c
@@ -65,11 +65,11 @@ static void *poly1305_dup(void *vsrc)
 
     if (!ossl_prov_is_running())
         return NULL;
-    dst = poly1305_new(src->provctx);
+    dst = OPENSSL_malloc(sizeof(*dst));
     if (dst == NULL)
         return NULL;
 
-    dst->poly1305 = src->poly1305;
+    *dst = *src;
     return dst;
 }
 
@@ -86,6 +86,7 @@ static int poly1305_setkey(struct poly1305_data_st *ctx,
         return 0;
     }
     Poly1305_Init(&ctx->poly1305, key);
+    ctx->updated = 0;
     return 1;
 }