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/*
* S3 Put Object via Secure Streams minimal siv4 example
*
* Written in 2010-2020 by Andy Green <andy@warmcat.com>
* Amit Pachore <apachor@amazon.com>
* securestreams-dev@amazon.com
*
* This file is made available under the Creative Commons CC0 1.0
* Universal Public Domain Dedication.
*/
#include <libwebsockets.h>
#include <assert.h>
#include "ss-s3-put.h"
extern int interrupted, bad;
static lws_ss_state_return_t
ss_s3_rx(void *userobj, const uint8_t *buf, size_t len, int flags)
{
// ss_s3_put_t *m = (ss_s3_put_t *)userobj;
if (flags & LWSSS_FLAG_EOM) {
bad = 0;
interrupted = 1; /* this example wants to exit after rx */
return LWSSSSRET_DESTROY_ME;
}
lwsl_user("%s: len %d, flags: %d\n", __func__, (int)len, flags);
lwsl_hexdump_err(buf, len);
return LWSSSSRET_OK;
}
static lws_ss_state_return_t
ss_s3_tx(void *userobj, lws_ss_tx_ordinal_t ord, uint8_t *buf, size_t *len,
int *flags)
{
ss_s3_put_t *m = (ss_s3_put_t *)userobj;
if (!m->pos)
*flags |= LWSSS_FLAG_SOM;
lwsl_user("%s: Send... total: %ld, pos: %ld\n", __func__,
(long)m->total, (long)m->pos);
if (*len > m->total - m->pos)
*len = m->total - m->pos;
if (!*len)
return LWSSSSRET_TX_DONT_SEND;
memcpy(buf, m->buf + m->pos, *len);
m->pos += *len;
if (m->pos == m->total) {
*flags |= LWSSS_FLAG_EOM;
// m->pos = 0; /* we only want to send once */
} else
return lws_ss_request_tx(m->ss);
return LWSSSSRET_OK;
}
static const char *awsService = "s3",
*awsRegion = "us-west-2",
*s3bucketName = "sstest2020",
#if 1
*s3ObjName = "SSs3upload2.txt";
#else
/* test huge string sigv4 hashing works */
*s3ObjName = "SSs3uploadaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa2.txt";
#endif
static char timestamp[32], payload_hash[65];
static uint8_t jpl[1 * 1024];
static void
create_payload(uint8_t *buf, size_t s)
{
int i;
for (i = 0; i < (int)s; i++)
buf[i] = (uint8_t)('a' + i % 16);
}
static void set_time(char *t)
{
/*20150830T123600Z*/
time_t ti = time(NULL);
#if defined(LWS_HAVE_GMTIME_R)
struct tm tmp;
struct tm *tm = gmtime_r(&ti, &tmp);
#else
struct tm *tm = gmtime(&ti);
#endif
assert(tm);
strftime(t, 20, "%Y%m%dT%H%M%SZ", tm);
}
static void bin2hex(uint8_t *in, size_t len, char *out)
{
static const char *hex = "0123456789abcdef";
size_t n;
for (n = 0; n < len; n++) {
*out++ = hex[(in[n] >> 4) & 0xf];
*out++ = hex[in[n] & 15];
}
*out = '\0';
}
static void sigv4_sha256hash_payload(uint8_t *payload, size_t len, char *hash)
{
struct lws_genhash_ctx hash_ctx;
uint8_t hash_bin[32];
if (lws_genhash_init(&hash_ctx, LWS_GENHASH_TYPE_SHA256) ||
/*
* If there is no payload, you must provide the hash of an
* empty string...
*/
lws_genhash_update(&hash_ctx,
payload ? (void *)payload : (void *)"",
payload ? len : 0u) ||
lws_genhash_destroy(&hash_ctx, hash_bin))
{
lws_genhash_destroy(&hash_ctx, NULL);
lwsl_err("%s lws_genhash failed\n", __func__);
return;
}
bin2hex(hash_bin, 32, hash);
}
static lws_ss_state_return_t
ss_s3_state(void *userobj, void *sh, lws_ss_constate_t state,
lws_ss_tx_ordinal_t ack)
{
ss_s3_put_t *m = (ss_s3_put_t *)userobj;
lwsl_user("%s: %s %s, ord 0x%x\n", __func__, lws_ss_tag(m->ss),
lws_ss_state_name((int)state), (unsigned int)ack);
switch (state) {
case LWSSSCS_CREATING:
create_payload(jpl, sizeof(jpl));
m->buf = (uint8_t *)jpl;
m->total = sizeof(jpl);
sigv4_sha256hash_payload(m->buf, m->total, payload_hash);
memset(timestamp, 0, sizeof(timestamp));
set_time(timestamp);
if (lws_ss_set_metadata(m->ss, "s3bucket",
s3bucketName, strlen(s3bucketName)) ||
lws_ss_set_metadata(m->ss, "s3Obj",
s3ObjName, strlen(s3ObjName)) ||
lws_ss_set_metadata(m->ss, "ctype",
"text/plain", strlen("text/plain")) ||
lws_ss_set_metadata(m->ss, "region",
awsRegion, strlen(awsRegion)) ||
lws_ss_set_metadata(m->ss, "service",
awsService, strlen(awsService)) ||
lws_ss_set_metadata(m->ss, "xacl",
"bucket-owner-full-control",
strlen("bucket-owner-full-control")) ||
lws_ss_set_metadata(m->ss, "xcsha256",
payload_hash, strlen(payload_hash)) ||
lws_ss_set_metadata(m->ss, "xdate",
timestamp, strlen(timestamp)))
return LWSSSSRET_DESTROY_ME;
return lws_ss_request_tx_len(m->ss, m->total);
case LWSSSCS_CONNECTED:
return lws_ss_request_tx(m->ss);
case LWSSSCS_DISCONNECTED:
return LWSSSSRET_DESTROY_ME;
case LWSSSCS_ALL_RETRIES_FAILED:
/* if we're out of retries, we want to close the app and FAIL */
bad = 1;
return LWSSSSRET_DESTROY_ME;
case LWSSSCS_QOS_ACK_REMOTE:
bad = 0;
break;
case LWSSSCS_QOS_NACK_REMOTE:
bad = 1;
break;
case LWSSSCS_DESTROYING:
interrupted = 1;
break;
default:
break;
}
return 0;
}
const lws_ss_info_t s3_ssi = {
.handle_offset = offsetof(ss_s3_put_t, ss),
.opaque_user_data_offset = offsetof(ss_s3_put_t, opaque_data),
.rx = ss_s3_rx,
.tx = ss_s3_tx,
.state = ss_s3_state,
.user_alloc = sizeof(ss_s3_put_t),
.streamtype = "s3PutObj"
};
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