int mbedtls_x509_crt_verify_info( char *buf, size_t size, const char *prefix,
                          uint32_t flags )
{
    int ret;
    const struct x509_crt_verify_string *cur;
    char *p = buf;
    size_t n = size;

    for( cur = x509_crt_verify_strings; cur->string != NULL ; cur++ )
    {
        if( ( flags & cur->code ) == 0 )
            continue;

        ret = mbedtls_snprintf( p, n, "%s%s\n", prefix, cur->string );
        MBEDTLS_X509_SAFE_SNPRINTF;
        flags ^= cur->code;
    }

    if( flags != 0 )
    {
        ret = mbedtls_snprintf( p, n, "%sUnknown reason "
                                       "(this should not happen)\n", prefix );
        MBEDTLS_X509_SAFE_SNPRINTF;
    }

    return( (int) ( size - n ) );
}

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.