public virtual async Task <string> GenerateAsync(string codeCacheKey, TimeSpan codeCacheLifespan,
VerificationCodeConfiguration configuration)
{
var verificationCode = await _verificationCodeGenerator.CreateAsync(configuration);
await _cache.SetAsync(codeCacheKey, new VerificationCodeCacheItem(verificationCode),
new DistributedCacheEntryOptions { AbsoluteExpirationRelativeToNow = codeCacheLifespan });
return(verificationCode);
}
public virtual Task <string> CreateAsync(VerificationCodeConfiguration configuration)
{
if (configuration.Generate != null)
{
return(Task.FromResult(configuration.Generate.Invoke()));
}
Check.NotNullOrWhiteSpace(configuration.Chars, nameof(configuration.Chars));
return(Task.FromResult(RandomString(configuration.Chars, configuration.Length)));
}
public virtual async Task <bool> ValidateAsync(string codeCacheKey, string verificationCode,
VerificationCodeConfiguration configuration)
{
var cacheItem = await _cache.GetAsync(codeCacheKey, true);
if (cacheItem == null)
{
return(false);
}
await _cache.RemoveAsync(codeCacheKey);
return(IsInputCodeCorrect(verificationCode, cacheItem.Code, configuration));
}
protected virtual bool IsInputCodeCorrect(string inputCode, string correctCode,
VerificationCodeConfiguration configuration)
{
if (inputCode.Length != correctCode.Length)
{
return(false);
}
if (configuration.EquivalentCharsMaps.IsNullOrEmpty())
{
return(inputCode == correctCode);
}
for (var i = 0; i < inputCode.Length; i++)
{
if (!IsCharCorrect(inputCode[i], correctCode[i], configuration.EquivalentCharsMaps))
{
return(false);
}
}
return(true);
}