简介
如果需要对上传的对象进行加密,我们支持以下加密方式。
使用 SSE-COS 加密保护数据
功能说明
由腾讯云 COS 托管主密钥和管理数据。COS 会帮助您在数据写入数据中心时自动加密,并在您取用该数据时自动解密。目前支持使用 COS 主密钥对数据进行 AES-256 加密。
C SDK 通过设置
x-cos-server-side-encryption
头部来完成。示例
int main(int argc, char *argv[]){cos_pool_t *p = NULL;int is_cname = 0;cos_status_t *s = NULL;cos_request_options_t *options = NULL;cos_string_t bucket;cos_string_t object;cos_table_t *resp_headers = NULL;cos_table_t *headers = NULL;cos_string_t file;cos_string_t download_file;// 初始化if (cos_http_io_initialize(NULL, 0) != COSE_OK) {exit(1);}cos_pool_create(&p, NULL);// 初始化请求选项options = cos_request_options_create(p);options->config = cos_config_create(options->pool);cos_str_set(&options->config->endpoint, "cos.ap-guangzhou.myqcloud.com"); // your endpointcos_str_set(&options->config->access_key_id, "SECRETID"); // your SecretIdcos_str_set(&options->config->access_key_secret, "SECRETKEY"); // your SecretKeycos_str_set(&options->config->appid, "APPID"); //your appidoptions->config->is_cname = is_cname;options->ctl = cos_http_controller_create(options->pool, 0);cos_str_set(&bucket, "<BucketName-APPID>"); //your bucketname, <BucketName-APPID>// 设置服务端加密头部,SSE-COSheaders = cos_table_make(p, 1);apr_table_add(headers, "x-cos-server-side-encryption", "AES256");cos_str_set(&file, "example1.txt"); // your filenamecos_str_set(&object, "example_object"); // your object name// 上传对象s = cos_put_object_from_file(options, &bucket, &object, &file, headers, &resp_headers);if (cos_status_is_ok(s)) {printf("put object succeeded\\n");} else {printf("put object failed\\n");}// 下载对象cos_str_set(&download_file, "example2.txt");s = cos_get_object_to_file(options, &bucket, &object, NULL, NULL, &download_file, &resp_headers);if (cos_status_is_ok(s)) {printf("get object succeeded\\n");} else {printf("get object failed\\n");}cos_pool_destroy(p);cos_http_io_deinitialize();return 0;}
使用 SSE-C 加密保护数据
加密密钥由用户自己提供,用户在上传对象时,COS 将使用用户提供的加密密钥对用户的数据进行 AES-256 加密。C SDK 通过设置
x-cos-server-side-encryption-customer-*
头部来完成。功能说明
注意
该加密所运行的服务需要使用 HTTPS 请求。
customerKey:用户提供的密钥,传入一个32字节的字符串,支持数字、字母、字符的组合,不支持中文。
如果上传的源文件调用了该方法,那么在使用 GET(下载)、HEAD(查询)时对源对象操作的时候也要调用该方法。
示例
int main(int argc, char *argv[]){cos_pool_t *p = NULL;int is_cname = 0;cos_status_t *s = NULL;cos_request_options_t *options = NULL;cos_string_t bucket;cos_string_t object;cos_table_t *resp_headers = NULL;cos_table_t *headers = NULL;cos_string_t file;cos_string_t download_file;// 初始化if (cos_http_io_initialize(NULL, 0) != COSE_OK) {exit(1);}cos_pool_create(&p, NULL);// 初始化请求选项options = cos_request_options_create(p);options->config = cos_config_create(options->pool);cos_str_set(&options->config->endpoint, "https://cos.ap-guangzhou.myqcloud.com"); // your endpoint, 需要使用HTTPS请求cos_str_set(&options->config->access_key_id, "SECRETID"); // your SecretIdcos_str_set(&options->config->access_key_secret, "SECRETKEY"); // your SecretKeycos_str_set(&options->config->appid, "APPID"); //your appidoptions->config->is_cname = is_cname;options->ctl = cos_http_controller_create(options->pool, 0);cos_str_set(&bucket, "<BucketName-APPID>"); //your bucketname, <BucketName-APPID>// 设置服务端加密头部,SSE-Cheaders = cos_table_make(p, 3);apr_table_add(headers, "x-cos-server-side-encryption-customer-algorithm", "AES256");apr_table_add(headers, "x-cos-server-side-encryption-customer-key", "MDEyMzQ1Njc4OUFCQ0RFRjAxMjM0NTY3ODlBQkNERUY="); //替换成您的服务端加密密钥的 Base64 编码apr_table_add(headers, "x-cos-server-side-encryption-customer-key-MD5", "U5L61r7jcwdNvT7frmUG8g=="); // 替换成您的服务端加密密钥 MD5 哈希值的 Base64 编码cos_str_set(&file, "example1.txt"); // your filenamecos_str_set(&object, "example_object"); // your object name// 上传对象s = cos_put_object_from_file(options, &bucket, &object, &file, headers, &resp_headers);if (cos_status_is_ok(s)) {printf("put object succeeded\\n");} else {printf("put object failed\\n");}// 下载对象,下载对象也需要提供服务端加密头部cos_str_set(&download_file, "example2.txt");s = cos_get_object_to_file(options, &bucket, &object, headers, NULL, &download_file, &resp_headers);if (cos_status_is_ok(s)) {printf("get object succeeded\\n");} else {printf("get object failed\\n");}cos_pool_destroy(p);cos_http_io_deinitialize();return 0;}