go語(yǔ)言中怎么使用openssl庫(kù)

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在 Go 語(yǔ)言中使用 OpenSSL 庫(kù)可以通過(guò)調(diào)用 C 語(yǔ)言的接口來(lái)實(shí)現(xiàn)。首先需要安裝 CGO 工具，然后在 Go 代碼中引入 C 語(yǔ)言的頭文件和庫(kù)文件，然后在 Go 代碼中調(diào)用相應(yīng)的 OpenSSL 函數(shù)即可。

以下是一個(gè)簡(jiǎn)單的示例代碼，演示了如何在 Go 語(yǔ)言中使用 OpenSSL 庫(kù)來(lái)進(jìn)行加密操作：

package main

/*
#cgo LDFLAGS: -lssl -lcrypto
#include <openssl/aes.h>
#include <openssl/rand.h>
#include <openssl/evp.h>
#include <openssl/sha.h>
*/
import "C"

import ("fmt"
	"unsafe"
)

func main() {key := make([]byte, 32)
	C.RAND_bytes((*C.uchar)(unsafe.Pointer(&key[0])), C.int(len(key)))

	text := []byte("hello world")

	encrypted := make([]byte, len(text))
	iv := make([]byte, C.EVP_MAX_IV_LENGTH)

	C.EVP_CIPHER_CTX_new()
	ctx := C.EVP_CIPHER_CTX_new()
	C.EVP_EncryptInit_ex(ctx, C.EVP_aes_256_cbc(), nil, (*C.uchar)(unsafe.Pointer(&key[0])), (*C.uchar)(unsafe.Pointer(&iv[0])))
	C.EVP_EncryptUpdate(ctx, (*C.uchar)(unsafe.Pointer(&encrypted[0])), (*C.int)(unsafe.Pointer(C.int(len(encrypted)))), (*C.uchar)(unsafe.Pointer(&text[0])), C.int(len(text)))

	fmt.Printf("Encrypted: %x\n", encrypted)

	decrypted := make([]byte, len(text))

	C.EVP_DecryptInit_ex(ctx, C.EVP_aes_256_cbc(), nil, (*C.uchar)(unsafe.Pointer(&key[0])), (*C.uchar)(unsafe.Pointer(&iv[0])))
	C.EVP_DecryptUpdate(ctx, (*C.uchar)(unsafe.Pointer(&decrypted[0])), (*C.int)(unsafe.Pointer(C.int(len(decrypted))), (*C.uchar)(unsafe.Pointer(&encrypted[0])), C.int(len(encrypted)))

	fmt.Printf("Decrypted: %s\n", decrypted)
}