144 lines
3.4 KiB
Go
144 lines
3.4 KiB
Go
package mysql
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import (
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"context"
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"fmt"
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"strings"
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"github.com/hashicorp/go-secure-stdlib/strutil"
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uuid "github.com/hashicorp/go-uuid"
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"github.com/hashicorp/vault/sdk/framework"
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"github.com/hashicorp/vault/sdk/helper/dbtxn"
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"github.com/hashicorp/vault/sdk/logical"
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)
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func pathRoleCreate(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: "creds/" + framework.GenericNameRegex("name"),
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Fields: map[string]*framework.FieldSchema{
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"name": {
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Type: framework.TypeString,
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Description: "Name of the role.",
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},
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},
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathRoleCreateRead,
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},
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HelpSynopsis: pathRoleCreateReadHelpSyn,
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HelpDescription: pathRoleCreateReadHelpDesc,
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}
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}
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func (b *backend) pathRoleCreateRead(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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name := data.Get("name").(string)
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// Get the role
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role, err := b.Role(ctx, req.Storage, name)
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if err != nil {
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return nil, err
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}
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if role == nil {
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return logical.ErrorResponse(fmt.Sprintf("unknown role: %s", name)), nil
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}
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// Determine if we have a lease
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lease, err := b.Lease(ctx, req.Storage)
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if err != nil {
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return nil, err
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}
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if lease == nil {
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lease = &configLease{}
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}
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// Generate our username and password. The username will be a
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// concatenation of:
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//
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// - the role name, truncated to role.rolenameLength (default 4)
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// - the token display name, truncated to role.displaynameLength (default 4)
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// - a UUID
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//
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// the entire concatenated string is then truncated to role.usernameLength,
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// which by default is 16 due to limitations in older but still-prevalent
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// versions of MySQL.
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roleName := name
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if len(roleName) > role.RolenameLength {
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roleName = roleName[:role.RolenameLength]
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}
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displayName := req.DisplayName
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if len(displayName) > role.DisplaynameLength {
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displayName = displayName[:role.DisplaynameLength]
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}
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userUUID, err := uuid.GenerateUUID()
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if err != nil {
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return nil, err
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}
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username := fmt.Sprintf("%s-%s-%s", roleName, displayName, userUUID)
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if len(username) > role.UsernameLength {
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username = username[:role.UsernameLength]
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}
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password, err := uuid.GenerateUUID()
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if err != nil {
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return nil, err
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}
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// Get our handle
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db, err := b.DB(ctx, req.Storage)
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if err != nil {
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return nil, err
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}
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// Start a transaction
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tx, err := db.Begin()
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if err != nil {
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return nil, err
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}
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defer tx.Rollback()
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// Execute each query
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for _, query := range strutil.ParseArbitraryStringSlice(role.SQL, ";") {
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query = strings.TrimSpace(query)
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if len(query) == 0 {
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continue
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}
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m := map[string]string{
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"name": username,
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"password": password,
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}
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if err := dbtxn.ExecuteTxQueryDirect(ctx, tx, m, query); err != nil {
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return nil, err
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}
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}
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// Commit the transaction
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if err := tx.Commit(); err != nil {
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return nil, err
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}
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// Return the secret
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resp := b.Secret(SecretCredsType).Response(map[string]interface{}{
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"username": username,
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"password": password,
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}, map[string]interface{}{
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"username": username,
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"role": name,
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})
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resp.Secret.TTL = lease.Lease
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resp.Secret.MaxTTL = lease.LeaseMax
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return resp, nil
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}
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const pathRoleCreateReadHelpSyn = `
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Request database credentials for a certain role.
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`
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const pathRoleCreateReadHelpDesc = `
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This path reads database credentials for a certain role. The
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database credentials will be generated on demand and will be automatically
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revoked when the lease is up.
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`
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