windows: suppress UI in all CryptAcquireContext() calls

Ref: https://docs.microsoft.com/windows/win32/api/wincrypt/nf-wincrypt-cryptacquirecontexta#parameters
Reviewed-by: Marc Hörsken
Closes https://github.com/curl/curl/pull/5088

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/md5.c b/lib/md5.c
index 3f601b3a4..766158786 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -186,8 +186,8 @@ typedef struct {
 
 static void MD5_Init(MD5_CTX *ctx)
 {
-  if(CryptAcquireContext(&ctx->hCryptProv, NULL, NULL,
-                         PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
+  if(CryptAcquireContext(&ctx->hCryptProv, NULL, NULL, PROV_RSA_FULL,
+                         CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
     CryptCreateHash(ctx->hCryptProv, CALG_MD5, 0, 0, &ctx->hHash);
   }
 }