I would like to POST a mp4 file to AWS MediaStore using Python and the Signature v4. I am trying to use the PutObject
action from MediaStore.
For this job, I cannot use the SDK or the CLI.
I can make GET requests to MediaStore with Python without the SDK or the CLI, but regarding POST requests, I didn't understand how I should handle the payload. I got the following error :
<InvalidSignatureException>
<Message>The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.</Message>
</InvalidSignatureException>
# NON WORKING CODE
import sys, os, base64, datetime, hashlib, hmac
import requests # pip install requests
method = 'PUT'
service = 'mediastore'
host = 'qwerty123.data.mediastore.ap-northeast-1.amazonaws.com'
region = 'ap-northeast-1'
endpoint = 'https://qwerty123.data.mediastore.ap-northeast-1.amazonaws.com'
request_parameters = 'Action=PutObject&Path=dummyfile.mp4&Version=2017-09-01'
cwd = os.getcwd()
def sign(key, msg):
return hmac.new(key, msg.encode('utf-8'), hashlib.sha256).digest()
def getSignatureKey(key, dateStamp, regionName, serviceName):
kDate = sign(('AWS4' + key).encode('utf-8'), dateStamp)
kRegion = sign(kDate, regionName)
kService = sign(kRegion, serviceName)
kSigning = sign(kService, 'aws4_request')
return kSigning
access_key = "AXXXXXXXXXXXA"
secret_key = "UXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD"
if access_key is None or secret_key is None:
print('No access key is available.')
sys.exit()
t = datetime.datetime.utcnow()
amzdate = t.strftime('%Y%m%dT%H%M%SZ')
datestamp = t.strftime('%Y%m%d')
canonical_uri = '/'
canonical_querystring = request_parameters
payload_hash = hashlib.sha256(('').encode('utf-8')).hexdigest()
canonical_headers = 'content-type:video/mp4' + '\n' +'host:' + host + '\n' + 'x-amz-content-sha256:'+payload_hash + '\n' + 'x-amz-date:' + amzdate + '\n' + 'x-amz-storage-class:'+ "TEMPORAL" + '\n'
signed_headers = 'content-type;host;x-amz-content-sha256;x-amz-storage-class;x-amz-date'
canonical_request = method + '\n' + canonical_uri + '\n' + canonical_querystring + '\n' + canonical_headers + '\n' + signed_headers + '\n' + payload_hash
algorithm = 'AWS4-HMAC-SHA256'
credential_scope = datestamp + '/' + region + '/' + service + '/' + 'aws4_request'
string_to_sign = algorithm + '\n' + amzdate + '\n' + credential_scope + '\n' + hashlib.sha256(canonical_request.encode('utf-8')).hexdigest()
signing_key = getSignatureKey(secret_key, datestamp, region, service)
signature = hmac.new(signing_key, (string_to_sign).encode('utf-8'), hashlib.sha256).hexdigest()
authorization_header = algorithm + ' ' + 'Credential=' + access_key + '/' + credential_scope + ', ' + 'SignedHeaders=' + signed_headers + ', ' + 'Signature=' + signature
headers = {'Content-Type':'video/mp4','x-amz-date':amzdate,'X-Amz-Content-Sha256':payload_hash, 'X-Amz-Storage-Class':'TEMPORAL', 'Authorization':authorization_header}
request_url = endpoint + '?' + canonical_querystring
print('\n * * * * * * * * * * * * BEGIN REQUEST * * * * * * * * * * * * ')
print('Request URL = ' + request_url)
files = {'file': open(cwd + "/" + "dummyfile.mp4", 'rb')}
r = requests.post(request_url, headers=headers, files=files)
print('\n* * * * * * * * * * * * * * RESPONSE * * * * * * * * * * * * *')
print('Response code: %d\n' % r.status_code)
print(r.text)
From the doc :
POST premium/canada/mlaw.avi
Host: aaabbbcccdddee.files.mediastore-us-west-2.com
x-amz-Date: 20170323T120000Z
Authorization: AWS4-HMAC-SHA256 Credential=AKIAIOSFODNN7EXAMPLE/20141123/us-west-2/mediastore/aws4_request,SignedHeaders=host;x-amz-date;x-amz-mediastore-version,Signature=9257c16da6b25a715ce900a5b45b03da0447acf430195dcb540091b12966f2a2
Content-Length: 0
x-amz-mediastore-version: 2016-07-11
# WORKING CODE
# NB Apparently the x-amz-content-sha256 header is not necessary
import sys, os, base64, datetime, hashlib, hmac
import requests # pip install requests
method = 'GET'
service = 'mediastore'
host = 'qwerty123.data.mediastore.ap-northeast-1.amazonaws.com'
region = 'ap-northeast-1'
endpoint = 'https://qwerty123.data.mediastore.ap-northeast-1.amazonaws.com'
request_parameters = 'Action=ListItems&Version=2017-09-01'
def sign(key, msg):
return hmac.new(key, msg.encode('utf-8'), hashlib.sha256).digest()
def getSignatureKey(key, dateStamp, regionName, serviceName):
kDate = sign(('AWS4' + key).encode('utf-8'), dateStamp)
kRegion = sign(kDate, regionName)
kService = sign(kRegion, serviceName)
kSigning = sign(kService, 'aws4_request')
return kSigning
access_key = "AXXXXXXXXXXXXXXA"
secret_key = "UXXXXXXXXXXXXXXXXXXXXXXXXXXXXD"
if access_key is None or secret_key is None:
print('No access key is available.')
sys.exit()
t = datetime.datetime.utcnow()
amzdate = t.strftime('%Y%m%dT%H%M%SZ')
datestamp = t.strftime('%Y%m%d')
canonical_uri = '/'
canonical_querystring = request_parameters
payload_hash = hashlib.sha256(('').encode('utf-8')).hexdigest()
canonical_headers = 'content-type:application/x-www-form-urlencoded; charset=utf-8' + '\n' +'host:' + host + '\n' + 'x-amz-date:' + amzdate + '\n' #+ 'x-amz-content-sha256:'+payload_hash + '\n'
signed_headers = 'content-type;host;x-amz-date' #x-amz-content-sha256;
canonical_request = method + '\n' + canonical_uri + '\n' + canonical_querystring + '\n' + canonical_headers + '\n' + signed_headers + '\n' + payload_hash
algorithm = 'AWS4-HMAC-SHA256'
credential_scope = datestamp + '/' + region + '/' + service + '/' + 'aws4_request'
string_to_sign = algorithm + '\n' + amzdate + '\n' + credential_scope + '\n' + hashlib.sha256(canonical_request.encode('utf-8')).hexdigest()
signing_key = getSignatureKey(secret_key, datestamp, region, service)
signature = hmac.new(signing_key, (string_to_sign).encode('utf-8'), hashlib.sha256).hexdigest()
authorization_header = algorithm + ' ' + 'Credential=' + access_key + '/' + credential_scope + ', ' + 'SignedHeaders=' + signed_headers + ', ' + 'Signature=' + signature
headers = {'Content-Type':'application/x-www-form-urlencoded; charset=utf-8','x-amz-date':amzdate, 'Authorization':authorization_header} #'X-Amz-Content-Sha256':payload_hash,
request_url = endpoint + '?' + canonical_querystring
print('\n * * * * * * * * * * * * BEGIN REQUEST * * * * * * * * * * * * ')
print('Request URL = ' + request_url)
r = requests.get(request_url, headers=headers)
print('\n* * * * * * * * * * * * * * RESPONSE * * * * * * * * * * * * *')
print('Response code: %d\n' % r.status_code)
print(r.text)
Any help would be highly appreciated.
I removed the x-amz-content-sha256
header from the GET request, the request is still working.
I tried to do the same thing with the POST request, without success.
The following things were wrong in my script :
The canonical_uri
must be set to : /filename.mp4
The following headers are necessary : host,contentlength,x-amz-content-sha256,x-amz-date
The payload_hash
must be set to UNSIGNED-PAYLOAD
Here is the working curl request (with Ruby variables) :
`curl -v -X PUT -T #{target_file} \\
-H "Content-Lenght: #{file_size}" \\
-H "host: #{host}" \\
-H "X-Amz-Content-Sha256: #{payload_hash}" \\
-H "X-Amz-Date: #{timestamp}" \\
-H "Authorization: AWS4-HMAC-SHA256 Credential=#{access_key_id + '/' + credential_scope}, SignedHeaders=#{headers_lst}, Signature=#{signature}" \\
"https://qwerty123.data.mediastore.ap-northeast-1.amazonaws.com#{canonical_uri}?#{request_parameters}"`
@TonyJafar : thanks for your help