diff --git a/lib/curl_md5.h b/lib/curl_md5.h
index ddc61e3e5..b445500fc 100644
--- a/lib/curl_md5.h
+++ b/lib/curl_md5.h
@@ -25,10 +25,39 @@
 #ifndef CURL_DISABLE_CRYPTO_AUTH
 #include "curl_hmac.h"
 
+#define MD5_DIGEST_LEN  16
+
+typedef void (* Curl_MD5_init_func)(void *context);
+typedef void (* Curl_MD5_update_func)(void *context,
+                                      const unsigned char *data,
+                                      unsigned int len);
+typedef void (* Curl_MD5_final_func)(unsigned char *result, void *context);
+
+typedef struct {
+  Curl_MD5_init_func     md5_init;      /* Initialize context procedure */
+  Curl_MD5_update_func   md5_update;    /* Update context with data */
+  Curl_MD5_final_func    md5_final;     /* Get final result procedure */
+  unsigned int           md5_ctxtsize;  /* Context structure size */
+  unsigned int           md5_resultlen; /* Result length (bytes) */
+} MD5_params;
+
+typedef struct {
+  const MD5_params      *md5_hash;      /* Hash function definition */
+  void                  *md5_hashctx;   /* Hash function context */
+} MD5_context;
+
+extern const MD5_params Curl_DIGEST_MD5[1];
 extern const HMAC_params Curl_HMAC_MD5[1];
 
 void Curl_md5it(unsigned char *output,
                 const unsigned char *input);
+
+MD5_context * Curl_MD5_init(const MD5_params *md5params);
+int Curl_MD5_update(MD5_context *context,
+                    const unsigned char *data,
+                    unsigned int len);
+int Curl_MD5_final(MD5_context *context, unsigned char *result);
+
 #endif
 
 #endif /* HEADER_CURL_MD5_H */
diff --git a/lib/md5.c b/lib/md5.c
index 13cb9e294..e58f2c515 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -407,6 +407,15 @@ const HMAC_params Curl_HMAC_MD5[] = {
   }
 };
 
+const MD5_params Curl_DIGEST_MD5[] = {
+  {
+    (Curl_MD5_init_func) MD5_Init,      /* Digest initialization function */
+    (Curl_MD5_update_func) MD5_Update,  /* Digest update function */
+    (Curl_MD5_final_func) MD5_Final,    /* Digest computation end function */
+    sizeof(MD5_CTX),                    /* Size of digest context struct */
+    16                                  /* Result size */
+  }
+};
 
 void Curl_md5it(unsigned char *outbuffer, /* 16 bytes */
                 const unsigned char *input)
@@ -417,4 +426,45 @@ void Curl_md5it(unsigned char *outbuffer, /* 16 bytes */
   MD5_Final(outbuffer, &ctx);
 }
 
+MD5_context * Curl_MD5_init(const MD5_params *md5params)
+{
+  MD5_context* ctxt;
+
+  /* Create MD5 context */
+  ctxt = malloc(sizeof *ctxt);
+
+  if(!ctxt)
+    return ctxt;
+
+  ctxt->md5_hashctx = malloc(md5params->md5_ctxtsize);
+
+  if(!ctxt->md5_hashctx)
+    return ctxt->md5_hashctx;
+
+  ctxt->md5_hash = md5params;
+
+  (*md5params->md5_init)(ctxt->md5_hashctx);
+
+  return ctxt;
+}
+
+int Curl_MD5_update(MD5_context *context,
+                    const unsigned char *data,
+                    unsigned int len)
+{
+  (*context->md5_hash->md5_update)(context->md5_hashctx, data, len);
+
+  return 0;
+}
+
+int Curl_MD5_final(MD5_context *context, unsigned char *result)
+{
+  (*context->md5_hash->md5_final)(result, context->md5_hashctx);
+
+  free(context->md5_hashctx);
+  free(context);
+
+  return 0;
+}
+
 #endif /* CURL_DISABLE_CRYPTO_AUTH */