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126 lines
3.1 KiB
Go
126 lines
3.1 KiB
Go
package vm
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import (
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"crypto/sha1"
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"github.com/CityOfZion/neo-go/pkg/crypto/hash"
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"github.com/CityOfZion/neo-go/pkg/vm/stack"
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)
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// SHA1 pops an item off of the stack and
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// pushes a bytearray onto the stack whose value
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// is obtained by applying the sha1 algorithm to
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// the corresponding bytearray representation of the item.
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// Returns an error if the Pop method cannot be execute or
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// the popped item does not have a concrete bytearray implementation.
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func SHA1(op stack.Instruction, ctx *stack.Context, istack *stack.Invocation, rstack *stack.RandomAccess) (Vmstate, error) {
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i, err := ctx.Estack.Pop()
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if err != nil {
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return FAULT, err
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}
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ba, err := i.ByteArray()
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if err != nil {
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return FAULT, err
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}
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alg := sha1.New()
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alg.Write(ba.Value())
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hash := alg.Sum(nil)
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res := stack.NewByteArray(hash)
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ctx.Estack.Push(res)
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return NONE, nil
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}
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// SHA256 pops an item off of the stack and
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// pushes a bytearray onto the stack whose value
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// is obtained by applying the Sha256 algorithm to
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// the corresponding bytearray representation of the item.
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// Returns an error if the Pop method cannot be execute or
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// the popped item does not have a concrete bytearray implementation.
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func SHA256(op stack.Instruction, ctx *stack.Context, istack *stack.Invocation, rstack *stack.RandomAccess) (Vmstate, error) {
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i, err := ctx.Estack.Pop()
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if err != nil {
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return FAULT, err
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}
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ba, err := i.ByteArray()
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if err != nil {
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return FAULT, err
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}
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hash, err := hash.Sha256(ba.Value())
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if err != nil {
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return FAULT, err
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}
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res := stack.NewByteArray(hash.Bytes())
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ctx.Estack.Push(res)
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return NONE, nil
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}
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// HASH160 pops an item off of the stack and
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// pushes a bytearray onto the stack whose value
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// is obtained by applying the Hash160 algorithm to
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// the corresponding bytearray representation of the item.
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// Returns an error if the Pop method cannot be execute or
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// the popped item does not have a concrete bytearray implementation.
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func HASH160(op stack.Instruction, ctx *stack.Context, istack *stack.Invocation, rstack *stack.RandomAccess) (Vmstate, error) {
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i, err := ctx.Estack.Pop()
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if err != nil {
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return FAULT, err
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}
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ba, err := i.ByteArray()
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if err != nil {
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return FAULT, err
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}
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hash, err := hash.Hash160(ba.Value())
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if err != nil {
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return FAULT, err
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}
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res := stack.NewByteArray(hash.Bytes())
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ctx.Estack.Push(res)
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return NONE, nil
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}
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// HASH256 pops an item off of the stack and
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// pushes a bytearray onto the stack whose value
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// is obtained by applying the Hash256 algorithm to
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// the corresponding bytearray representation of the item.
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// Returns an error if the Pop method cannot be execute or
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// the popped item does not have a concrete bytearray implementation.
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func HASH256(op stack.Instruction, ctx *stack.Context, istack *stack.Invocation, rstack *stack.RandomAccess) (Vmstate, error) {
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i, err := ctx.Estack.Pop()
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if err != nil {
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return FAULT, err
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}
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ba, err := i.ByteArray()
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if err != nil {
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return FAULT, err
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}
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hash, err := hash.DoubleSha256(ba.Value())
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if err != nil {
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return FAULT, err
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}
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res := stack.NewByteArray(hash.Bytes())
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ctx.Estack.Push(res)
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return NONE, nil
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}
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