Support for Presigned URLs

aws · Oct 1, 2023 · 4be42de · 4be42de
1 parent 0d37504
commit 4be42de
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Showing 2 changed files with 17 additions and 1 deletion.
diff --git a/source/include/sigv4.h b/source/include/sigv4.h
@@ -125,6 +125,15 @@
  */
 #define SIGV4_HTTP_PAYLOAD_IS_HASH               0x8U
 
+/**
+ * @ingroup sigv4_canonical_flags
+ * @brief Set this flag to indicate that the HTTP request payload is
+ * already hashed.
+ *
+ * This flag is valid only for #SigV4HttpParameters_t.flags.
+ */
+#define SIGV4_HTTP_PAYLOAD_IS_UNSIGNED           0x10U
+
 /**
  * @ingroup sigv4_canonical_flags
  * @brief Set this flag to indicate that the HTTP request path, query, and

diff --git a/source/sigv4.c b/source/sigv4.c
@@ -2083,7 +2083,7 @@ static void generateCredentialScope( const SigV4Parameters_t * pSigV4Params,
                                           pBufCur + 1U,
                                           &valueBytesWritten,
                                           true,
-                                          true );
+                                          false );
 
                 if( returnStatus == SigV4Success )
                 {
@@ -3090,6 +3090,13 @@ static SigV4Status_t writePayloadHashToCanonicalRequest( const SigV4Parameters_t
         /* Remove new line at the end of the payload. */
         pCanonicalContext->pBufCur--;
     }
+    else if( FLAG_IS_SET( pParams->pHttpParameters->flags, SIGV4_HTTP_PAYLOAD_IS_UNSIGNED ) )
+    {
+        /* Copy the UNSIGNED-PAYLOAD data in the headers data list. */
+        returnStatus = copyHeaderStringToCanonicalBuffer( "UNSIGNED-PAYLOAD", strlen("UNSIGNED-PAYLOAD"), pParams->pHttpParameters->flags, '\n', pCanonicalContext );
+        /* Remove new line at the end of the payload. */
+        pCanonicalContext->pBufCur--;
+    }
     else
     {
         encodedLen = pCanonicalContext->bufRemaining;