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node.go
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node.go
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package keeper
import (
"github.com/tendermint/tendermint/crypto"
tmbytes "github.com/tendermint/tendermint/libs/bytes"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/bianjieai/iritamod/modules/node/types"
cautils "github.com/bianjieai/iritamod/utils/ca"
)
// AddNode adds a node
func (k Keeper) AddNode(ctx sdk.Context, name string, cert string) (id tmbytes.HexBytes, err error) {
pubKey, err := k.VerifyCertificate(ctx, cert)
if err != nil {
return nil, err
}
id = pubKey.Address()
if k.HasNode(ctx, id) {
return nil, sdkerrors.Wrap(types.ErrNodeExists, id.String())
}
node := types.NewNode(id, name, cert)
k.SetNode(ctx, id, node)
return id, nil
}
// RemoveNode removes the specified node
func (k Keeper) RemoveNode(ctx sdk.Context, id tmbytes.HexBytes) error {
if !k.HasNode(ctx, id) {
return sdkerrors.Wrap(types.ErrUnknownNode, id.String())
}
k.DeleteNode(ctx, id)
return nil
}
// SetNode sets the given node
func (k Keeper) SetNode(ctx sdk.Context, id tmbytes.HexBytes, node types.Node) {
store := ctx.KVStore(k.storeKey)
bz := k.cdc.MustMarshal(&node)
store.Set(types.GetNodeKey(id), bz)
}
// DeleteNode deletes the given node
func (k Keeper) DeleteNode(ctx sdk.Context, id tmbytes.HexBytes) {
store := ctx.KVStore(k.storeKey)
store.Delete(types.GetNodeKey(id))
}
// HasNode returns true if the specified node exists, false otherwise
func (k Keeper) HasNode(ctx sdk.Context, id tmbytes.HexBytes) bool {
store := ctx.KVStore(k.storeKey)
return store.Has(types.GetNodeKey(id))
}
// GetNode retrieves the node of the specified ID
func (k Keeper) GetNode(ctx sdk.Context, id tmbytes.HexBytes) (node types.Node, found bool) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.GetNodeKey(id))
if bz == nil {
return node, false
}
k.cdc.MustUnmarshal(bz, &node)
return node, true
}
// GetNodes gets all nodes
func (k Keeper) GetNodes(ctx sdk.Context) []types.Node {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.NodeKey)
defer iterator.Close()
nodes := make([]types.Node, 0)
for ; iterator.Valid(); iterator.Next() {
var node types.Node
bz := iterator.Value()
k.cdc.MustUnmarshal(bz, &node)
nodes = append(nodes, node)
}
return nodes
}
// VerifyCertificate verifies the given certificate against the root certificate
// Ensure that the given certificate is a valid X.509 format
func (k Keeper) VerifyCertificate(ctx sdk.Context, certificate string) (crypto.PubKey, error) {
cert, _ := cautils.ReadCertificateFromMem([]byte(certificate))
rootCertStr, _ := k.GetRootCert(ctx)
rootCert, _ := cautils.ReadCertificateFromMem([]byte(rootCertStr))
if err := cautils.VerifyCertFromRoot(cert, rootCert); err != nil {
return nil, sdkerrors.Wrapf(types.ErrInvalidCert, "verification failed: %s", err)
}
pubKey, _ := cautils.GetPubkeyFromCert(cert)
return pubKey, nil
}