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permission.go
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permission.go
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package bsdb
import (
"errors"
"time"
gnfdresource "github.com/bnb-chain/greenfield/types/resource"
permtypes "github.com/bnb-chain/greenfield/x/permission/types"
"github.com/forbole/juno/v4/common"
"gorm.io/gorm"
)
// GetPermissionByResourceAndPrincipal get permission by resource type & ID, principal type & value
func (b *BsDBImpl) GetPermissionByResourceAndPrincipal(resourceType, principalType, principalValue string, resourceID common.Hash) (*Permission, error) {
var (
permission *Permission
err error
)
startTime := time.Now()
methodName := currentFunction()
defer func() {
if err != nil {
MetadataDatabaseFailureMetrics(err, startTime, methodName)
} else {
MetadataDatabaseSuccessMetrics(startTime, methodName)
}
}()
err = b.db.Table((&Permission{}).TableName()).
Select("*").
Where("resource_type = ? and resource_id = ? and principal_type = ? and principal_value = ? and removed = false", resourceType, resourceID, permtypes.PrincipalType_value[principalType], principalValue).
Take(&permission).Error
if errors.Is(err, gorm.ErrRecordNotFound) {
return nil, nil
}
return permission, err
}
// GetStatementsByPolicyID get statements info by a policy id
func (b *BsDBImpl) GetStatementsByPolicyID(policyIDList []common.Hash, includeRemoved bool) ([]*Statement, error) {
var (
statements []*Statement
err error
)
startTime := time.Now()
methodName := currentFunction()
defer func() {
if err != nil {
MetadataDatabaseFailureMetrics(err, startTime, methodName)
} else {
MetadataDatabaseSuccessMetrics(startTime, methodName)
}
}()
if includeRemoved {
err = b.db.Table((&Statement{}).TableName()).
Select("*").
Where("policy_id in ?", policyIDList).
Find(&statements).Error
} else {
err = b.db.Table((&Statement{}).TableName()).
Select("*").
Where("policy_id in ? and removed = false", policyIDList).
Find(&statements).Error
}
return statements, err
}
// GetPermissionsByResourceAndPrincipleType get permission by resource type & ID, principal type
func (b *BsDBImpl) GetPermissionsByResourceAndPrincipleType(resourceType, principalType string, resourceID common.Hash, includeRemoved bool) ([]*Permission, error) {
var (
permissions []*Permission
err error
)
startTime := time.Now()
methodName := currentFunction()
defer func() {
if err != nil {
MetadataDatabaseFailureMetrics(err, startTime, methodName)
} else {
MetadataDatabaseSuccessMetrics(startTime, methodName)
}
}()
if includeRemoved {
err = b.db.Table((&Permission{}).TableName()).
Select("*").
Where("resource_type = ? and resource_id = ? and principal_type = ?", resourceType, resourceID, permtypes.PrincipalType_value[principalType]).
Find(&permissions).Error
} else {
err = b.db.Table((&Permission{}).TableName()).
Select("*").
Where("resource_type = ? and resource_id = ? and principal_type = ? and removed = false", resourceType, resourceID, permtypes.PrincipalType_value[principalType]).
Find(&permissions).Error
}
return permissions, err
}
// Eval is used to evaluate the execution results of permission policies.
func (p Permission) Eval(action permtypes.ActionType, blockTime time.Time, opts *permtypes.VerifyOptions, statements []*Statement) permtypes.Effect {
var (
allowed bool
e permtypes.Effect
)
// 1. the policy is expired, need delete
if p.ExpirationTime != 0 && time.Unix(p.ExpirationTime, 0).Before(blockTime) {
// Notice: We do not actively delete policies that expire for users.
return permtypes.EFFECT_UNSPECIFIED
}
// 2. check all the statements
for _, s := range statements {
if s.ExpirationTime != 0 && time.Unix(s.ExpirationTime, 0).Before(blockTime) {
continue
}
e = s.Eval(action, opts)
if e == permtypes.EFFECT_DENY {
return permtypes.EFFECT_DENY
} else if e == permtypes.EFFECT_ALLOW {
allowed = true
}
}
if allowed {
return permtypes.EFFECT_ALLOW
}
return permtypes.EFFECT_UNSPECIFIED
}
// ListObjectPolicies list policies by object info
func (b *BsDBImpl) ListObjectPolicies(objectID common.Hash, actionType permtypes.ActionType, startAfter common.Hash, limit int) ([]*PermissionWithStatement, error) {
var (
permissions []*PermissionWithStatement
actionValues []int
now int64
err error
)
startTime := time.Now()
methodName := currentFunction()
defer func() {
if err != nil {
MetadataDatabaseFailureMetrics(err, startTime, methodName)
} else {
MetadataDatabaseSuccessMetrics(startTime, methodName)
}
}()
now = time.Now().Unix()
actionValues = PossibleValuesForAction(actionType)
if len(actionValues) == 0 {
return nil, nil
}
err = b.db.Table((&Permission{}).TableName()).
Select("*").
Joins("INNER JOIN statements ON statements.policy_id = permission.policy_id").
Where(`
permission.resource_type = ? AND
permission.resource_id = ? AND
permission.policy_id > ? AND
(permission.expiration_time > ? OR permission.expiration_time = 0) AND
permission.removed = false AND
(statements.expiration_time > ? OR statements.expiration_time = 0)AND
statements.action_value in (?) AND
statements.effect = "EFFECT_ALLOW" AND
statements.removed = false`,
gnfdresource.RESOURCE_TYPE_OBJECT.String(),
objectID,
startAfter,
now,
now,
actionValues).
Order("permission.policy_id").
Limit(limit).
Find(&permissions).Error
return permissions, err
}