wasm will report an error when using the crypto/x509 package

[vicnoah]

`package vrsa

import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"io"
)

// GenerateRSAKey 生成rsa公私钥
func GenerateRSAKey(priv io.Writer, pub io.Writer, bits int) (err error) {
// GenerateKey函数使用随机数据生成器random生成一对具有指定字位数的RSA密钥
// Reader是一个全局、共享的密码用强随机数生成器
privateKey, err := rsa.GenerateKey(rand.Reader, bits)
if err != nil {
return
}
// 保存私钥
// 通过x509标准将得到的ras私钥序列化为ASN.1 的 DER编码字符串
X509PrivateKey := x509.MarshalPKCS1PrivateKey(privateKey)
// 使用pem格式对x509输出的内容进行编码
// 构建一个pem.Block结构体对象
privateBlock := pem.Block{Type: "RSA Private Key", Bytes: X509PrivateKey}
// 将数据保存到文件
err = pem.Encode(priv, &privateBlock)
if err != nil {
return
}
// 保存公钥
// 获取公钥的数据
publicKey := privateKey.PublicKey
// X509对公钥编码
X509PublicKey, err := x509.MarshalPKIXPublicKey(&publicKey)
if err != nil {
return
}
// pem格式编码
// 创建一个pem.Block结构体对象
publicBlock := pem.Block{Type: "RSA Public Key", Bytes: X509PublicKey}
err = pem.Encode(pub, &publicBlock)
return
}
`
Error message:
/snap/go/current/src/net/pipe.go:156:16: ErrDeadlineExceeded not declared by package os
/snap/go/current/src/net/pipe.go:169:16: ErrDeadlineExceeded not declared by package os
/snap/go/current/src/net/pipe.go:188:16: ErrDeadlineExceeded not declared by package os
/snap/go/current/src/net/pipe.go:204:17: ErrDeadlineExceeded not declared by package os

When I commented out the x509 package this error no longer occurred but unfortunately my program compiled and reported other errors

fatal error: unexpected signal during runtime execution
[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0x470b493]

runtime stack:
runtime.throw(0x4ea9aba, 0x2a)
/usr/local/go/src/runtime/panic.go:1116 +0x72
runtime.sigpanic()
/usr/local/go/src/runtime/signal_unix.go:701 +0x46a

goroutine 16 [syscall]:
runtime.cgocall(0xead0a0, 0xc001b939b8, 0xeadd20)
/usr/local/go/src/runtime/cgocall.go:133 +0x5b fp=0xc001b93988 sp=0xc001b93950 pc=0xad570b
tinygo.org/x/go-llvm._Cfunc_LLVMRunPassManager(0x7f3b467c23d0, 0x7f3b4420c9c0, 0x0)
_cgo_gotypes.go:8866 +0x4d fp=0xc001b939b8 sp=0xc001b93988 pc=0xd7df7d
tinygo.org/x/go-llvm.PassManager.Run.func1(0x7f3b467c23d0, 0x7f3b4420c9c0, 0x7f3b467c23d0)
/go/pkg/mod/tinygo.org/x/go-llvm@v0.0.0-20210325115028-e7b85195e81c/ir.go:1998 +0x79 fp=0xc001b939e8 sp=0xc001b939b8 pc=0xda8019
tinygo.org/x/go-llvm.PassManager.Run(0x7f3b467c23d0, 0x7f3b4420c9c0, 0x22)
/go/pkg/mod/tinygo.org/x/go-llvm@v0.0.0-20210325115028-e7b85195e81c/ir.go:1998 +0x35 fp=0xc001b93a10 sp=0xc001b939e8 pc=0xd8e1d5
github.com/tinygo-org/tinygo/transform.Optimize(0x7f3b4420c9c0, 0xc00024e690, 0x2, 0x2, 0x5, 0x0, 0x0, 0x0)
/home/circleci/project/transform/optimizer.go:64 +0x2b0 fp=0xc001b93da0 sp=0xc001b93a10 pc=0xe59030
github.com/tinygo-org/tinygo/builder.optimizeProgram(0x7f3b4420c9c0, 0xc00024e690, 0xc009cf47c0, 0x2)
/home/circleci/project/builder/build.go:698 +0x13d fp=0xc001b93e10 sp=0xc001b93da0 pc=0xe6f0cd
github.com/tinygo-org/tinygo/builder.Build.func2(0xc0044e8360, 0x0, 0x0)
/home/circleci/project/builder/build.go:390 +0x812 fp=0xc001b93f70 sp=0xc001b93e10 pc=0xe7f1e2
github.com/tinygo-org/tinygo/builder.jobWorker(0xc0044ec000, 0xc000f31f80)
/home/circleci/project/builder/jobs.go:165 +0xe0 fp=0xc001b93fd0 sp=0xc001b93f70 pc=0xe77990
runtime.goexit()
/usr/local/go/src/runtime/asm_amd64.s:1373 +0x1 fp=0xc001b93fd8 sp=0xc001b93fd0 pc=0xb34f01
created by github.com/tinygo-org/tinygo/builder.runJobs
/home/circleci/project/builder/jobs.go:84 +0xc5

goroutine 1 [chan receive]:
github.com/tinygo-org/tinygo/builder.runJobs(0xc000995c00, 0x34, 0x40, 0x0, 0x0)
/home/circleci/project/builder/jobs.go:116 +0x12f
github.com/tinygo-org/tinygo/builder.Build(0x7ffc7bc76164, 0x9, 0x7ffc7bc7613d, 0xe, 0xc00024e690, 0xc0046ebaf8, 0x0, 0x0)
/home/circleci/project/builder/build.go:609 +0x26be
main.Build(0x7ffc7bc76164, 0x9, 0x7ffc7bc7613d, 0xe, 0xc000222000, 0x0, 0x12)
/home/circleci/project/main.go:111 +0xc5
main.main()
/home/circleci/project/main.go:1047 +0x2406

goroutine 10 [chan receive]:
github.com/tinygo-org/tinygo/builder.jobWorker(0xc0044ec000, 0xc000f31f80)
/home/circleci/project/builder/jobs.go:162 +0x82
created by github.com/tinygo-org/tinygo/builder.runJobs
/home/circleci/project/builder/jobs.go:84 +0xc5

goroutine 11 [chan receive]:
github.com/tinygo-org/tinygo/builder.jobWorker(0xc0044ec000, 0xc000f31f80)
/home/circleci/project/builder/jobs.go:162 +0x82
created by github.com/tinygo-org/tinygo/builder.runJobs
/home/circleci/project/builder/jobs.go:84 +0xc5

goroutine 12 [chan receive]:
github.com/tinygo-org/tinygo/builder.jobWorker(0xc0044ec000, 0xc000f31f80)
/home/circleci/project/builder/jobs.go:162 +0x82
created by github.com/tinygo-org/tinygo/builder.runJobs
/home/circleci/project/builder/jobs.go:84 +0xc5

goroutine 13 [chan receive]:
github.com/tinygo-org/tinygo/builder.jobWorker(0xc0044ec000, 0xc000f31f80)
/home/circleci/project/builder/jobs.go:162 +0x82
created by github.com/tinygo-org/tinygo/builder.runJobs
/home/circleci/project/builder/jobs.go:84 +0xc5

goroutine 14 [chan receive]:
github.com/tinygo-org/tinygo/builder.jobWorker(0xc0044ec000, 0xc000f31f80)
/home/circleci/project/builder/jobs.go:162 +0x82
created by github.com/tinygo-org/tinygo/builder.runJobs
/home/circleci/project/builder/jobs.go:84 +0xc5

goroutine 15 [chan receive]:
github.com/tinygo-org/tinygo/builder.jobWorker(0xc0044ec000, 0xc000f31f80)
/home/circleci/project/builder/jobs.go:162 +0x82
created by github.com/tinygo-org/tinygo/builder.runJobs
/home/circleci/project/builder/jobs.go:84 +0xc5

goroutine 50 [chan receive]:
github.com/tinygo-org/tinygo/builder.jobWorker(0xc0044ec000, 0xc000f31f80)
/home/circleci/project/builder/jobs.go:162 +0x82
created by github.com/tinygo-org/tinygo/builder.runJobs
/home/circleci/project/builder/jobs.go:84 +0xc5

[aykevl]

This would be best solved by replacing the net package entirely. See: #1881

[fgsch]

Actually, there is another issue that needs to be addressed on top of #1881 - I will open a PR shortly.

[fgsch]

@vicnoah both PRs are merged now. Can you give it another try using the dev branch?

[vicnoah]

@vicnoah both PRs are merged now. Can you give it another try using the dev branch?

Ok, I will try later

[vicnoah]

@vicnoah both PRs are merged now. Can you give it another try using the dev branch?

I still get an error compiling with the dev branch.

/home/wwg/golib/pkg/sec/pay/v1/wasm/main.go:21: blocking operation in exported function: clientpay

traceback:
clientpay
        /home/wwg/golib/pkg/sec/pay/v1/wasm/main.go:22:23
github.com/vicnoah/golib/pkg/sec/pay/v1.Decrypt
        /home/wwg/golib/pkg/sec/pay/v1/decrypt.go:71:30
github.com/vicnoah/golib/pkg/sec/pay/v1.decryptCipher
        /home/wwg/golib/pkg/sec/pay/v1/decrypt.go:112:33
github.com/vicnoah/golib/crypto/vrsa.DecryptOAEP
        /home/wwg/golib/crypto/vrsa/rsa_oaep.go:35:35
crypto/rsa.DecryptOAEP
        /snap/go/7360/src/crypto/rsa/rsa.go:608:19
crypto/rsa.decrypt
        /snap/go/7360/src/crypto/rsa/rsa.go:501:25
crypto/internal/randutil.MaybeReadByte
        /snap/go/7360/src/crypto/internal/randutil/randutil.go:25:6
runtime.chanSelect
        /home/wwg/tinygo/src/runtime/chan.go:635:12

[fgsch]

This is different though. As the error says, clientpay will block and is exported.

[vicnoah]

This is different though. As the error says, clientpay will block and is exported.

I don't understand what this means. It didn't generate the wasm file. I will try again.

[aykevl]

I don't understand what this means.

It means that you do some sort of blocking operation in an exported function. In this case, it appears that the Decrypt call in the exported clientpay function indirectly tries to generate a random number which in turn has a select block, which is a blocking operation. This is not allowed in TinyGo and I don't think it will be in the future because JavaScript itself is non-blocking.