在Go語言中使用OpenSSL庫可以通過調用C語言的接口來實現。首先需要安裝CGO工具，然后在Go代碼中引入C語言的頭文件和庫文件，然后在Go代碼中調用相應的OpenSSL函數即可。

以下是一個簡單的示例代碼，演示了如何在Go語言中使用OpenSSL庫來進行加密操作：

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)
}

注意：這只是一個簡單的示例代碼，并不完整。在實際項目中，建議通過更加詳細的文檔和示例代碼來學習如何正確使用OpenSSL庫。