Go CBC Decrypter 解密加密文本，但部分文本被随机字符替换

假设我有这个Base64加密文本:(请理解这都是测试数据) 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个

我有这个IV:db64fa140a888b41 这把密钥是:62448f7b7128e8b55224dd667b7c1a7e

如果我使用此站点https://www.devglan.com/online-tools/aes-encryption-decryption使用CBC、256密钥大小和Base64解密来解密它，我会得到正确的字符串，即: "{\"totaldistance\":7.116600000000001,\"totaltraveltime\":9,\"fare\":{\"vehicle_list\":[{\"name\":\"Electric Limousine\",\"category_image\":\"image-1667907996681.png\",\"seat_count\":\"4\",\"unique_category_id\":6,\"available_for\":\"2\",\"schedule_before\":\"20\",\"schedule_upto\":\"10800\",\"nearest_driver\":{\"fare\":52,\"min_fare\":35},\"schedule_only\":true},{\"name\":\"Limousine\",\"category_image\":\"image-1667908122302.png\",\"seat_count\":\"4\",\"unique_category_id\":7,\"available_for\":\"2\",\"schedule_before\":\"20\",\"schedule_upto\":\"10800\",\"nearest_driver\":{\"fare\":48,\"min_fare\":32},\"schedule_only\":true},{\"name\":\"XL Limousine\",\"category_image\":\"image-1667907858244.png\",\"seat_count\":\"6\",\"unique_category_id\":13,\"available_for\":\"2\",\"schedule_before\":\"20\",\"schedule_upto\":\"10800\",\"nearest_driver\":{\"fare\":59,\"min_fare\":40},\"schedule_only\":true},{\"name\":\"Ameera Limousine\",\"category_image\":\"image-1667907336189.png\",\"seat_count\":\"4\",\"unique_category_id\":16,\"available_for\":\"2\",\"schedule_before\":\"20\",\"schedule_upto\":\"60\",\"nearest_driver\":{\"fare\":48,\"min_fare\":32},\"schedule_only\":true}]}}"

但每当我对相同的输入使用CBC解密函数时，我都会得到以下解密文本:

"��(|���\u000bҖ�\b�Dvltraveltime\\\":9,\\\"fare\\\":{\\\"vehicle_list\\\":[{\\\"name\\\":\\\"Electric Limousine\\\",\\\"category_image\\\":\\\"image-1667907996681.png\\\",\\\"seat_count\\\":\\\"4\\\",\\\"unique_category_id\\\":6,\\\"available_for\\\":\\\"2\\\",\\\"schedule_before\\\":\\\"20\\\",\\\"schedule_upto\\\":\\\"10800\\\",\\\"nearest_driver\\\":{\\\"fare\\\":52,\\\"min_fare\\\":35},\\\"schedule_only\\\":true},{\\\"name\\\":\\\"Limousine\\\",\\\"category_image\\\":\\\"image-1667908122302.png\\\",\\\"seat_count\\\":\\\"4\\\",\\\"unique_category_id\\\":7,\\\"available_for\\\":\\\"2\\\",\\\"schedule_before\\\":\\\"20\\\",\\\"schedule_upto\\\":\\\"10800\\\",\\\"nearest_driver\\\":{\\\"fare\\\":48,\\\"min_fare\\\":32},\\\"schedule_only\\\":true},{\\\"name\\\":\\\"XL Limousine\\\",\\\"category_image\\\":\\\"image-1667907858244.png\\\",\\\"seat_count\\\":\\\"6\\\",\\\"unique_category_id\\\":13,\\\"available_for\\\":\\\"2\\\",\\\"schedule_before\\\":\\\"20\\\",\\\"schedule_upto\\\":\\\"10800\\\",\\\"nearest_driver\\\":{\\\"fare\\\":59,\\\"min_fare\\\":40},\\\"schedule_only\\\":true},{\\\"name\\\":\\\"Ameera Limousine\\\",\\\"category_image\\\":\\\"image-1667907336189.png\\\",\\\"seat_count\\\":\\\"4\\\",\\\"unique_category_id\\\":16,\\\"available_for\\\":\\\"2\\\",\\\"schedule_before\\\":\\\"20\\\",\\\"schedule_upto\\\":\\\"60\\\",\\\"nearest_driver\\\":{\\\"fare\\\":47,\\\"min_fare\\\":31},\\\"schedule_only\\\":true}]}}\"\u000b\u000b\u000b\u000b\u000b\u000b\u000b\u000b\u000b\u000b\u000b"个

我正在使用这个解密函数:

func DecryptCBC(key, ciphertext []byte, iv string) (plaintext []byte, err error) {
    var block cipher.Block
    ciphertext, err = b64.StdEncoding.DecodeString(string(ciphertext))
    if block, err = aes.NewCipher(key); err != nil {
        return
    }

    if len(ciphertext) < aes.BlockSize {
        fmt.Printf("ciphertext too short")
        return
    }

    ciphertext = ciphertext[aes.BlockSize:]

    cbc := cipher.NewCBCDecrypter(block,[]byte(iv))
    cbc.CryptBlocks(ciphertext, ciphertext)

    plaintext = ciphertext

    return
}

我做错了什么？

我try 不传递向量并执行以下操作:

    iv := ciphertext[0:aes.BlockSize]

但它返回的结果是相同的.

加密文本从第三方API返回，第三方API也从不同的API提供密钥和令牌.