static SigV4Status_t appendSignedHeaders()

in source/sigv4.c [1505:1550]
33 lines of code
4 McCabe index (conditional complexity)

    static SigV4Status_t appendSignedHeaders( size_t headerCount,
                                              uint32_t flags,
                                              CanonicalContext_t * pCanonicalRequest,
                                              char ** pSignedHeaders,
                                              size_t * pSignedHeadersLen )
    {
        size_t headerIndex = 0, keyLen = 0;
        SigV4Status_t sigV4Status = SigV4Success;
        const char * headerKey;
        size_t uxSignedHeaderIndex;

        assert( pCanonicalRequest != NULL );
        assert( headerCount > 0 );

        /* Store the starting location of the Signed Headers in the Canonical Request buffer. */
        *pSignedHeaders = ( char * ) &( pCanonicalRequest->pBufProcessing[ pCanonicalRequest->uxCursorIndex ] );
        uxSignedHeaderIndex = pCanonicalRequest->uxCursorIndex;

        for( headerIndex = 0; headerIndex < headerCount; headerIndex++ )
        {
            assert( ( pCanonicalRequest->pHeadersLoc[ headerIndex ].key.pData ) != NULL );
            keyLen = pCanonicalRequest->pHeadersLoc[ headerIndex ].key.dataLen;

            headerKey = pCanonicalRequest->pHeadersLoc[ headerIndex ].key.pData;

            /* ';' is used to separate signed multiple headers in the canonical request. */
            sigV4Status = copyHeaderStringToCanonicalBuffer( headerKey, keyLen, flags, ';', pCanonicalRequest );

            if( sigV4Status != SigV4Success )
            {
                LogError( ( "Unable to write Signed Headers for Canonical Request: Insufficient memory configured in \"SIGV4_PROCESSING_BUFFER_LENGTH\"" ) );
                break;
            }
        }

        /* Store the length of the "Signed Headers" data appended to the Canonical Request. */
        *pSignedHeadersLen = pCanonicalRequest->uxCursorIndex - uxSignedHeaderIndex - 1U;

        if( sigV4Status == SigV4Success )
        {
            /* Replacing the last ';' with '\n' as last header should not have ';'. */
            ( ( char * ) ( pCanonicalRequest->pBufProcessing ) )[ pCanonicalRequest->uxCursorIndex - 1U ] = '\n';
        }

        return sigV4Status;
    }