// See the License for the specific language governing permissions and
// limitations under the License.

// Provides utility methods to generate X.509 certificates with different
// options. This implementation is Largely inspired from
// https://golang.org/src/crypto/tls/generate_cert.go.

package util

import (
	"crypto"
	"crypto/ecdsa"
	"crypto/rsa"
	"crypto/tls"
	"crypto/x509"
	"errors"
	"fmt"

package base

import (
	"context"
	"flag"
	"fmt"
	"log"
	"os"
	"os/exec"
	"reflect"
	"strings"
	"sync"

	"cmd/go/internal/cfg"
	"cmd/go/internal/str"
)

// A Command is an implementation of a go command
// like go build or go fix.
type Command struct {
	// Run runs the command.
	// The args are the arguments after the command name.
	Run func(ctx context.Context, cmd *Command, args []string)

package ecdsa

import (
	"crypto/elliptic"
	"errors"
	"io"
	"math/big"

	"golang.org/x/crypto/cryptobyte"
	"golang.org/x/crypto/cryptobyte/asn1"
)

// This file contains a math/big implementation of ECDSA that is only used for
// deprecated custom curves.

func generateLegacy(c elliptic.Curve, rand io.Reader) (*PrivateKey, error) {
	k, err := randFieldElement(c, rand)
	if err != nil {
		return nil, err
	}

	"io"
	"os"
	"os/signal"
	"reflect"
	"regexp"
	"runtime/pprof"
	"strings"
	"sync"
	"time"
)

// Cover indicates whether coverage is enabled.
var Cover bool

// TestDeps is an implementation of the testing.testDeps interface,
// suitable for passing to [testing.MainStart].
type TestDeps struct{}

var matchPat string
var matchRe *regexp.Regexp

	Env []string
	// Files specifies the open files inherited by the new process. The
	// first three entries correspond to standard input, standard output, and
	// standard error. An implementation may support additional entries,
	// depending on the underlying operating system. A nil entry corresponds
	// to that file being closed when the process starts.
	// On Unix systems, StartProcess will change these File values

package driver

import (
	"fmt"
	"reflect"
	"strconv"
	"time"
)

// ValueConverter is the interface providing the ConvertValue method.
//
// Various implementations of ValueConverter are provided by the
// driver package to provide consistent implementations of conversions
// between drivers. The ValueConverters have several uses:
//
//   - converting from the [Value] types as provided by the sql package

	if check.hasLabel {
		check.labels(body)
	}

	if sig.results.Len() > 0 && !check.isTerminating(body, "") {
		check.error(atPos(body.Rbrace), MissingReturn, "missing return")
	}

	// spec: "Implementation restriction: A compiler may make it illegal to
	// declare a variable inside a function body if the variable is never used."
	check.usage(sig.scope)
}

func (check *Checker) usage(scope *Scope) {
	var unused []*Var

		// or responses with a zero-length body.” Unfortunately, we didn't document
		// that same constraint for arbitrary RoundTripper implementations, and
		// RoundTripper implementations in the wild (mostly in tests) assume that
		// they can use a nil Body to mean an empty one (similar to Request.Body).
		// (See https://golang.org/issue/38095.)
		//
		// If the ContentLength allows the Body to be empty, fill in an empty one

//
// Implementations of PublicSuffixList must be safe for concurrent use by
// multiple goroutines.
//
// An implementation that always returns "" is valid and may be useful for
// testing but it is not secure: it means that the HTTP server for foo.com can
// set a cookie for bar.com.
//
// A public suffix list implementation is in the package
// golang.org/x/net/publicsuffix.

// to respect the negative parameter in the non-finite form.
//
// Implementations may choose to set the negative parameter to true on a zero or NaN value,
// but implementations that do not differentiate between negative and positive
// zero or NaN values should ignore the negative parameter without error.