diff -ru apr-util/crypto/apr_md4.c apr-util-md4/crypto/apr_md4.c
--- apr-util/crypto/apr_md4.c	Sat Jun  2 00:34:06 2001
+++ apr-util-md4/crypto/apr_md4.c	Mon Jun  4 18:53:29 2001
@@ -150,6 +150,9 @@
  */
 APU_DECLARE(apr_status_t) apr_md4_init(apr_md4_ctx_t *context)
 {
+    if (!context)
+        return APR_EINVAL;
+    
     context->count[0] = context->count[1] = 0;
 
     /* Load magic initialization constants. */
@@ -176,6 +179,9 @@
     apr_status_t rv;
     int is_sb;
 
+    if (!context)
+        return APR_EINVAL;
+    
     /* TODO: remove the single-byte-only restriction from this code
      */
     rv = apr_xlate_get_sb(xlate, &is_sb);
@@ -191,8 +197,8 @@
 #endif /* APR_HAS_XLATE */
 
 /* MD4 block update operation. Continues an MD4 message-digest
-   operation, processing another message block, and updating the
-   context.
+ * operation, processing another message block, and updating the
+ * context.
  */
 APU_DECLARE(apr_status_t) apr_md4_update(apr_md4_ctx_t *context,
                                          const unsigned char *input,
@@ -203,6 +209,9 @@
     apr_size_t inbytes_left, outbytes_left;
 #endif
 
+    if (!context)
+        return APR_EINVAL;
+    
     /* Compute number of bytes mod 64 */
     idx = (unsigned int)((context->count[0] >> 3) & 0x3F);
 
@@ -274,7 +283,7 @@
 }
 
 /* MD4 finalization. Ends an MD4 message-digest operation, writing the
-   the message digest and zeroizing the context.
+ * the message digest and zeroizing the context.
  */
 APU_DECLARE(apr_status_t) apr_md4_final(
                                     unsigned char digest[APR_MD4_DIGESTSIZE],
@@ -283,6 +292,9 @@
     unsigned char bits[8];
     unsigned int idx, padLen;
 
+    if (!context)
+        return APR_EINVAL;
+    
     /* Save number of bits */
     Encode(bits, context->count, 8);
 
@@ -306,6 +318,23 @@
     memset(context, 0, sizeof(*context));
     
     return APR_SUCCESS;
+}
+
+/* MD4 computation in one step (init, update, final)
+ */
+APU_DECLARE(apr_status_t) apr_md4(unsigned char digest[APR_MD4_DIGESTSIZE],
+                                  const unsigned char *input,
+                                  apr_size_t inputLen)
+{
+    apr_md4_ctx_t ctx;
+    apr_status_t rv;
+
+    apr_md4_init(&ctx);
+
+    if ((rv = apr_md4_update(&ctx, input, inputLen)) != APR_SUCCESS)
+        return rv;
+
+    return apr_md4_final(digest, &ctx);
 }
 
 /* MD4 basic transformation. Transforms state based on block. */
diff -ru apr-util/include/apr_md4.h apr-util-md4/include/apr_md4.h
--- apr-util/include/apr_md4.h	Sat Jun  2 00:34:07 2001
+++ apr-util-md4/include/apr_md4.h	Mon Jun  4 18:45:13 2001
@@ -135,7 +135,7 @@
  * @param context The MD4 content to update.
  * @param input next message block to update
  * @param inputLen The length of the next message block
- * @deffunc apr_status_t apr_md4_update(apr_md4_ctx_t *context, apr_size_t char *input, unsigned int inputLen)
+ * @deffunc apr_status_t apr_md4_update(apr_md4_ctx_t *context, const unsigned char *input, apr_size_t inputLen)
  */
 APU_DECLARE(apr_status_t) apr_md4_update(apr_md4_ctx_t *context,
                                          const unsigned char *input,
@@ -151,6 +151,17 @@
 APU_DECLARE(apr_status_t) apr_md4_final(
                                     unsigned char digest[APR_MD4_DIGESTSIZE],
                                     apr_md4_ctx_t *context);
+
+/**
+ * MD4 digest computation
+ * @param digest The MD4 digest
+ * @param input message block to use
+ * @param inputLen The length of the message block
+ * @deffunc apr_status_t apr_md4(unsigned char digest[APR_MD4_DIGESTSIZE], const unsigned char *input, apr_size_t inputLen);
+ */
+APU_DECLARE(apr_status_t) apr_md4(unsigned char digest[APR_MD4_DIGESTSIZE],
+                                  const unsigned char *input,
+                                  apr_size_t inputLen);
 
 #ifdef __cplusplus
 }