From ab6d5cefbea1e8ddf41f385dd85918f651958287 Mon Sep 17 00:00:00 2001
From: benj <benj@rse8.com>
Date: Mon, 19 Jun 2023 17:18:21 -0700
Subject: hack to allow impersonator to impersonate target

---
 crates/secd/src/auth/n.rs | 91 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 86 insertions(+), 5 deletions(-)

(limited to 'crates/secd/src/auth/n.rs')

diff --git a/crates/secd/src/auth/n.rs b/crates/secd/src/auth/n.rs
index dde6e7d..12a5411 100644
--- a/crates/secd/src/auth/n.rs
+++ b/crates/secd/src/auth/n.rs
@@ -5,12 +5,13 @@ use crate::{
             DEFAULT_SIGNUP_EMAIL,
         },
         store::{
-            AddressLens, AddressValidationLens, CredentialLens, IdentityLens, Storable, StoreError,
+            AddressLens, AddressValidationLens, CredentialLens, IdentityLens, ImpersonatorLens,
+            Storable, StoreError,
         },
     },
     util::{self, ErrorContext},
     Address, AddressType, AddressValidation, AddressValidationId, AddressValidationMethod,
-    Credential, CredentialId, CredentialType, Identity, IdentityId, Secd, SecdError,
+    Credential, CredentialId, CredentialType, Identity, IdentityId, Impersonator, Secd, SecdError,
     ADDRESSS_VALIDATION_CODE_SIZE, ADDRESS_VALIDATION_ALLOWS_ATTEMPTS,
     ADDRESS_VALIDATION_IDENTITY_SURJECTION, EMAIL_VALIDATION_DURATION,
 };
@@ -19,6 +20,7 @@ use log::warn;
 use rand::Rng;
 use std::str::FromStr;
 use time::{Duration, OffsetDateTime};
+use tokio::join;
 use uuid::Uuid;
 
 impl Secd {
@@ -363,13 +365,13 @@ impl Secd {
         Ok(identity)
     }
 
-    pub async fn validate_credential(&self, t: CredentialType) -> Result<Credential, SecdError> {
+    pub async fn validate_credential(&self, t: &CredentialType) -> Result<Credential, SecdError> {
         let mut retrieved = Credential::find(
             self.store.clone(),
             &CredentialLens {
                 id: None,
                 identity_id: None,
-                t: Some(&t),
+                t: Some(t),
             },
         )
         .await?
@@ -396,7 +398,7 @@ impl Secd {
         retrieved.hash_compare(&t, &self.crypter)?;
 
         // Return the initially provided plaintext credential since it's valid
-        retrieved.t = t;
+        retrieved.t = t.clone();
 
         Ok(retrieved)
     }
@@ -503,4 +505,83 @@ impl Secd {
         credential.write(self.store.clone()).await?;
         Ok(())
     }
+
+    pub async fn impersonate(
+        &self,
+        impersonator_id: &IdentityId,
+        target_id: &IdentityId,
+    ) -> Result<Credential, SecdError> {
+        let impersonator_lens = IdentityLens {
+            id: Some(&impersonator_id),
+            address_type: None,
+            validated_address: None,
+        };
+        let target_lens = IdentityLens {
+            id: Some(&target_id),
+            address_type: None,
+            validated_address: None,
+        };
+        let (i, t) = join!(
+            Identity::find(self.store.clone(), &impersonator_lens,),
+            Identity::find(self.store.clone(), &target_lens,)
+        );
+
+        let (i, t) = (
+            i.ctx("failed to retrieve impersonator identity")?,
+            t.ctx("failed to retrieve target identity")?,
+        );
+        if i.is_empty() || t.is_empty() {
+            return Err(SecdError::IdentityNotFound)
+                .ctx("failed to retrieve impersonator or target identity for impersonation");
+        }
+
+        let existing_impersonation = Impersonator::find(
+            self.store.clone(),
+            &ImpersonatorLens {
+                impersonator_id: Some(impersonator_id),
+                target_id: Some(target_id),
+            },
+        )
+        .await
+        .ctx("failed to find existing impersonation")?;
+
+        // TODO: We could expire the session chain, but I think we want to handle this more intelligently.
+        // For now, just revoke the credential manually...pita I know...
+        if !existing_impersonation.is_empty() {
+            return Err(SecdError::ImpersonatorAlreadyExists)
+                .ctx("Target already being impersonated by the provided impersonator identity");
+        }
+
+        let new_identity = self
+            .create_credential(
+                Credential::new_session(*target_id)?.t,
+                Some(*target_id),
+                OffsetDateTime::now_utc().checked_add(Duration::minutes(30)),
+            )
+            .await
+            .ctx("failed to create new credential for target identity")?;
+
+        let new_session = new_identity
+            .new_credentials
+            .iter()
+            .next()
+            .ok_or(SecdError::InvalidCredential)
+            .ctx("failed to retrieve new session from newly created target credential")?
+            .clone();
+
+        Impersonator {
+            impersonator: i
+                .into_iter()
+                .next()
+                .ok_or(SecdError::IdentityNotFound)
+                .ctx("failed to find impersonator identity")?,
+            target: new_identity,
+            created_at: OffsetDateTime::now_utc(),
+        }
+        .write(self.store.clone())
+        .await
+        .ctx("failed to write new impersonator")?;
+
+        Ok(new_session)
+    }
 }
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