seahaven-site/terraform/hcp_iam.tf

# HCP plan/apply roles imported from seahaven-terraform-substrate (PLAT-146).
# Import, do not recreate. Role names stay hcptf-seahaven-site / hcptf-seahaven-site-plan.
#
# Live seahaven-hcptf-iam-management DenySelfMutation blocks DetachRolePolicy
# and PutRolePolicy on hcptf-* (including this role). Import apply sequence:
#   1. seahaven-org-baseline scripts/create-hcptf-bootstrap-roles.sh
#        --account prod --allow-workspace seahaven-site-prod
#   2. Point this workspace's TFC_AWS_* at hcptf-bootstrap /
#      hcptf-bootstrap-plan (workspace vars, never a project set).
#   3. One Manual apply (import + detach seahaven-hcptf-iam-management +
#      put scoped inline).
#   4. Point TFC_AWS_* back at hcptf-seahaven-site / hcptf-seahaven-site-plan.
#   5. Re-run the script without --allow-workspace to pin trust back to
#      iam-bootstrap-prod only.
# This stack has no Lambda execution-role boundary pin.

import {
  to = aws_iam_role.hcptf_apply
  id = "hcptf-seahaven-site"
}

import {
  to = aws_iam_role.hcptf_plan
  id = "hcptf-seahaven-site-plan"
}

import {
  to = aws_iam_role_policy.hcptf_apply_services
  id = "hcptf-seahaven-site:seahaven-site-services"
}

import {
  to = aws_iam_role_policy.hcptf_plan_refresh
  id = "hcptf-seahaven-site-plan:seahaven-site-plan-refresh"
}

import {
  to = aws_iam_role_policy_attachments_exclusive.hcptf_apply
  id = "hcptf-seahaven-site"
}

import {
  to = aws_iam_role_policy_attachment.hcptf_plan_viewonly
  id = "hcptf-seahaven-site-plan/arn:aws:iam::aws:policy/job-function/ViewOnlyAccess"
}

import {
  to = aws_iam_role_policy_attachments_exclusive.hcptf_plan
  id = "hcptf-seahaven-site-plan"
}

data "aws_iam_policy_document" "hcptf_apply_trust" {
  statement {
    sid     = "HcpApply"
    effect  = "Allow"
    actions = ["sts:AssumeRoleWithWebIdentity"]

    principals {
      type        = "Federated"
      identifiers = ["arn:aws:iam::${local.account_id}:oidc-provider/app.terraform.io"]
    }

    condition {
      test     = "StringEquals"
      variable = "app.terraform.io:aud"
      values   = ["aws.workload.identity"]
    }

    condition {
      test     = "StringEquals"
      variable = "app.terraform.io:sub"
      values = [
        "organization:seahaven:project:seahaven-prod:workspace:seahaven-site-prod:run_phase:apply",
      ]
    }
  }
}

data "aws_iam_policy_document" "hcptf_plan_trust" {
  statement {
    sid     = "HcpPlan"
    effect  = "Allow"
    actions = ["sts:AssumeRoleWithWebIdentity"]

    principals {
      type        = "Federated"
      identifiers = ["arn:aws:iam::${local.account_id}:oidc-provider/app.terraform.io"]
    }

    condition {
      test     = "StringEquals"
      variable = "app.terraform.io:aud"
      values   = ["aws.workload.identity"]
    }

    condition {
      test     = "StringEquals"
      variable = "app.terraform.io:sub"
      values = [
        "organization:seahaven:project:seahaven-prod:workspace:seahaven-site-prod:run_phase:plan",
      ]
    }
  }
}

data "aws_iam_policy_document" "hcptf_scoped_iam" {
  statement {
    sid       = "DenyCreatePolicy"
    effect    = "Deny"
    actions   = ["iam:CreatePolicy", "iam:CreatePolicyVersion"]
    resources = ["*"]
  }

  statement {
    sid    = "WriteDeployRoles"
    effect = "Allow"
    actions = [
      "iam:AttachRolePolicy",
      "iam:DeleteRolePolicy",
      "iam:DetachRolePolicy",
      "iam:PutRolePolicy",
      "iam:TagRole",
      "iam:UntagRole",
      "iam:UpdateAssumeRolePolicy",
      "iam:UpdateRole",
      "iam:UpdateRoleDescription",
    ]
    resources = ["arn:aws:iam::${local.account_id}:role/tf-managed/githubdeploy-seahaven-site"]
  }

  statement {
    sid    = "IamReadOnly"
    effect = "Allow"
    actions = [
      "iam:GetPolicy",
      "iam:GetPolicyVersion",
      "iam:GetRole",
      "iam:GetRolePolicy",
      "iam:ListAttachedRolePolicies",
      "iam:ListInstanceProfilesForRole",
      "iam:ListPolicies",
      "iam:ListPolicyVersions",
      "iam:ListRolePolicies",
      "iam:ListRoleTags",
      "iam:ListRoles",
    ]
    resources = ["*"]
  }

  statement {
    sid    = "DenySelfMutation"
    effect = "Deny"
    actions = [
      "iam:AttachRolePolicy",
      "iam:DeleteRole",
      "iam:DeleteRolePolicy",
      "iam:DeleteRolePermissionsBoundary",
      "iam:DetachRolePolicy",
      "iam:PutRolePolicy",
      "iam:PutRolePermissionsBoundary",
      "iam:UpdateAssumeRolePolicy",
      "iam:UpdateRole",
      "iam:UpdateRoleDescription",
    ]
    resources = [
      "arn:aws:iam::${local.account_id}:role/hcptf-*",
      "arn:aws:iam::${local.account_id}:role/github-cfn-execution-role",
      "arn:aws:iam::${local.account_id}:role/githubdeploy-*",
      "arn:aws:iam::${local.account_id}:role/cdk-hnb659fds-*",
      "arn:aws:iam::${local.account_id}:role/OrganizationAccountAccessRole",
      "arn:aws:iam::${local.account_id}:role/seahaven-*",
    ]
  }

  statement {
    sid    = "DenyBoundaryTampering"
    effect = "Deny"
    actions = [
      "iam:DeleteRolePermissionsBoundary",
      "iam:DeleteUserPermissionsBoundary",
    ]
    resources = [
      "arn:aws:iam::${local.account_id}:role/*",
      "arn:aws:iam::${local.account_id}:user/*",
    ]
  }

  statement {
    sid    = "DenyBoundaryPolicyEdit"
    effect = "Deny"
    actions = [
      "iam:CreatePolicyVersion",
      "iam:DeletePolicy",
      "iam:DeletePolicyVersion",
      "iam:SetDefaultPolicyVersion",
    ]
    resources = ["arn:aws:iam::${local.account_id}:policy/seahaven-*"]
  }
}

resource "aws_iam_role_policy" "hcptf_apply_services" {
  name = "seahaven-site-services"
  role = aws_iam_role.hcptf_apply.id
  policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action = [
          "s3:*",
        ]
        Resource = [
          "arn:aws:s3:::seahaven-site-prod",
          "arn:aws:s3:::seahaven-site-prod/*",
        ]
        Effect = "Allow"
        Sid    = "OriginBucket"
      },
      {
        Action = [
          "iam:GetOpenIDConnectProvider",
        ]
        Resource = [
          "arn:aws:iam::${local.account_id}:oidc-provider/token.actions.githubusercontent.com",
        ]
        Effect = "Allow"
        Sid    = "ReadGithubOidcProvider"
      },
      {
        Action = [
          "cloudfront:*",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "CloudFrontManage"
      },
      {
        Condition = {
          StringEquals = {
            "aws:RequestTag/Project" = "seahaven-site"
          }
        }
        Action = [
          "acm:RequestCertificate",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "AcmCreate"
      },
      {
        Action = [
          "acm:ListCertificates",
          "acm:ListTagsForCertificate",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "AcmList"
      },
      {
        Condition = {
          StringEquals = {
            "aws:ResourceTag/Project" = "seahaven-site"
          }
        }
        Action = [
          "acm:DescribeCertificate",
          "acm:GetCertificate",
          "acm:DeleteCertificate",
          "acm:AddTagsToCertificate",
          "acm:RemoveTagsFromCertificate",
          "acm:RenewCertificate",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "AcmManageTagged"
      },
      {
        Action = [
          "ssm:GetParameter",
          "ssm:GetParameters",
        ]
        Resource = [
          "arn:aws:ssm:us-east-1:${local.account_id}:parameter/seahaven/waf/app-web-acl-arn",
        ]
        Effect = "Allow"
        Sid    = "ReadAppWebAclSsm"
      },
      {
        Action = [
          "wafv2:GetWebACL",
          "wafv2:GetWebACLForResource",
          "wafv2:ListWebACLs",
          "wafv2:ListResourcesForWebACL",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "ReadWafWebAcl"
      },
    ]
  })
}

resource "aws_iam_role_policy" "hcptf_plan_refresh" {
  name = "seahaven-site-plan-refresh"
  role = aws_iam_role.hcptf_plan.id
  policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action = [
          "iam:GetRole",
          "iam:GetRolePolicy",
          "iam:ListRolePolicies",
          "iam:ListAttachedRolePolicies",
          "iam:ListRoleTags",
        ]
        Resource = [
          "arn:aws:iam::${local.account_id}:role/tf-managed/githubdeploy-seahaven-site",
          "arn:aws:iam::${local.account_id}:role/hcptf-seahaven-site",
          "arn:aws:iam::${local.account_id}:role/hcptf-seahaven-site-plan",
        ]
        Effect = "Allow"
        Sid    = "RefreshDeployRole"
      },
      {
        Action = [
          "iam:GetOpenIDConnectProvider",
        ]
        Resource = [
          "arn:aws:iam::${local.account_id}:oidc-provider/token.actions.githubusercontent.com",
        ]
        Effect = "Allow"
        Sid    = "RefreshGithubOidcProvider"
      },
      {
        Action = [
          "iam:GetPolicy",
          "iam:GetPolicyVersion",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "RefreshManagedPolicies"
      },
      {
        Action = [
          "s3:Get*",
          "s3:ListBucket",
        ]
        Resource = [
          "arn:aws:s3:::seahaven-site-prod",
          "arn:aws:s3:::seahaven-site-prod/*",
        ]
        Effect = "Allow"
        Sid    = "RefreshOriginBucket"
      },
      {
        Action = [
          "cloudfront:Get*",
          "cloudfront:List*",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "RefreshCloudFront"
      },
      {
        Action = [
          "cloudfront:DescribeFunction",
        ]
        Resource = [
          "arn:aws:cloudfront::${local.account_id}:function/seahaven-site-prod-directory-index",
        ]
        Effect = "Allow"
        Sid    = "RefreshCloudFrontFunction"
      },
      {
        Action = [
          "acm:DescribeCertificate",
          "acm:ListCertificates",
          "acm:ListTagsForCertificate",
          "acm:GetCertificate",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "RefreshAcm"
      },
      {
        Action = [
          "ssm:GetParameter",
          "ssm:GetParameters",
        ]
        Resource = [
          "arn:aws:ssm:us-east-1:${local.account_id}:parameter/seahaven/waf/app-web-acl-arn",
        ]
        Effect = "Allow"
        Sid    = "RefreshAppWebAclSsm"
      },
      {
        Action = [
          "wafv2:GetWebACL",
          "wafv2:ListWebACLs",
        ]
        Resource = "*"
        Effect   = "Allow"
        Sid      = "RefreshWafWebAcl"
      },
    ]
  })
}

resource "aws_iam_role" "hcptf_apply" {
  name                 = "hcptf-seahaven-site"
  assume_role_policy   = data.aws_iam_policy_document.hcptf_apply_trust.json
  max_session_duration = 3600

  tags = {
    Project   = "seahaven-site"
    Owner     = "adam@seahavenind.com"
    ManagedBy = "terraform"
  }
}

# Empty exclusive set keeps seahaven-hcptf-iam-management detached.
resource "aws_iam_role_policy_attachments_exclusive" "hcptf_apply" {
  role_name   = aws_iam_role.hcptf_apply.name
  policy_arns = []
}

resource "aws_iam_role" "hcptf_plan" {
  name                 = "hcptf-seahaven-site-plan"
  assume_role_policy   = data.aws_iam_policy_document.hcptf_plan_trust.json
  max_session_duration = 3600

  tags = {
    Project   = "seahaven-site"
    Owner     = "adam@seahavenind.com"
    ManagedBy = "terraform"
  }
}

resource "aws_iam_role_policy_attachment" "hcptf_plan_viewonly" {
  role       = aws_iam_role.hcptf_plan.name
  policy_arn = "arn:aws:iam::aws:policy/job-function/ViewOnlyAccess"
}

resource "aws_iam_role_policy_attachments_exclusive" "hcptf_plan" {
  role_name = aws_iam_role.hcptf_plan.name
  policy_arns = [
    aws_iam_role_policy_attachment.hcptf_plan_viewonly.policy_arn,
  ]
}

resource "aws_iam_role_policy" "hcptf_scoped_iam" {
  name   = "scoped-iam-management"
  role   = aws_iam_role.hcptf_apply.id
  policy = data.aws_iam_policy_document.hcptf_scoped_iam.json
}