70 lines
2.9 KiB
C#
70 lines
2.9 KiB
C#
using EnvelopeGenerator.Application.Interfaces.Services;
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using Microsoft.Extensions.Caching.Distributed;
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using Microsoft.Extensions.Options;
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using EnvelopeGenerator.Application.Common.Configurations;
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using EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver;
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using EnvelopeGenerator.Application.Common.Dto.Messaging;
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using EnvelopeGenerator.Application.Common.Extensions;
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namespace EnvelopeGenerator.Application.Services;
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/// <summary>
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///
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/// </summary>
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public class EnvelopeSmsHandler : IEnvelopeSmsHandler
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{
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private readonly ISmsSender _sender;
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private readonly TotpSmsParams _totpSmsParams;
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private readonly IDistributedCache _dCache;
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private readonly IAuthenticator _authenticator;
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/// <summary>
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///
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="totpSmsParamsOptions"></param>
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/// <param name="distributedCache"></param>
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/// <param name="authenticator"></param>
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public EnvelopeSmsHandler(ISmsSender sender, IOptions<TotpSmsParams> totpSmsParamsOptions, IDistributedCache distributedCache, IAuthenticator authenticator)
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{
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_sender = sender;
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_totpSmsParams = totpSmsParamsOptions.Value;
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_dCache = distributedCache;
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_authenticator = authenticator;
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}
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/// <summary>
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/// If expiration is passed then, sends sms and returns smsResponse and up-to-date expiration; otherwise send expiration.
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/// </summary>
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/// <param name="er_secret"></param>
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/// <param name="cToken"></param>
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/// <returns></returns>
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public async Task<(SmsResponse? SmsResponse, DateTime Expiration)> SendTotpAsync(EnvelopeReceiverSecretDto er_secret, CancellationToken cToken = default)
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{
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var key = string.Format(_totpSmsParams.Expiration.CacheKeyFormat, er_secret.EnvelopeId, er_secret.ReceiverId);
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var expiration = await _dCache.GetDateTimeAsync(key, cToken);
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if(expiration is DateTime expirationDateTime && expirationDateTime >= DateTime.Now)
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return (null, expirationDateTime);
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else
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{
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var new_expiration = DateTime.Now.AddSeconds(_totpSmsParams.TotpStep);
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var totp = _authenticator.GenerateTotp(er_secret.Receiver!.TotpSecretkey!, _totpSmsParams.TotpStep);
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var msg = string.Format(_totpSmsParams.Format, totp, new_expiration.ToString(_totpSmsParams.Expiration.Format, _totpSmsParams.Expiration.CultureInfo));
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await _dCache.SetDateTimeAsync(key, new_expiration, cToken: cToken);
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return (await _sender.SendSmsAsync(er_secret.PhoneNumber!, msg), new_expiration);
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}
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="totpCode"></param>
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/// <param name="secretKey"></param>
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/// <returns></returns>
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public bool VerifyTotp(string totpCode, string secretKey) => _authenticator
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.VerifyTotp(totpCode, secretKey, _totpSmsParams.TotpStep, _totpSmsParams.TotpVerificationWindow);
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} |