basic authorization command for curl

Question

How do I set up the basic authorization using 64 encoded credentials   I tried below the two commands but  of no use   please suggest   curl -i -H  Accept application json  Authorization Basic  lt username password gt  http   example com curl -i -H  Accept application json  Authorization Basic base64 encode username password  http   example com

User · Accepted Answer

Use the -H header again before the Authorization Basic things  So it will be  curl -i       -H  Accept application json        -H  Authorization Basic BASE64 string        http   example com   Here  BASE64 string   Base64 of username password

User · Answer

Background You can use the base64 CLI tool to generate the base64 encoded version of your username   password like this    echo -n  quot joeuser secretpass quot    base64 am9ldXNlcjpzZWNyZXRwYXNz  -or-    base64  lt  lt  lt  quot joeuser secretpass quot  am9ldXNlcjpzZWNyZXRwYXNzCg    Base64 is reversible so you can also decode it to confirm like this    echo -n  quot joeuser secretpass quot    base64   base64 -D joeuser secretpass  -or-    base64  lt  lt  lt  quot joeuser secretpass quot    base64 -D joeuser secretpass  NOTE  username   joeuser  password   secretpass Example  1 - using -H You can put this together into curl like this    curl -H  quot Authorization  Basic   base64  lt  lt  lt  quot joeuser secretpass quot   quot  http   example com  Example  2 - using -u Most will likely agree that if you re going to bother doing this  then you might as well just use curl s -u option     curl --help  grep --  quot --user  quot   -u  --user USER  PASSWORD   Server user and password   For example    curl -u someuser secretpass http   example com  But you can do this in a semi-safer manner if you keep your credentials in a encrypted vault service such as LastPass or Pass  For example  here I m using the LastPass  CLI tool  lpass  to retrieve my credentials    curl -u   lpass show --username example com    lpass show --password example com         http   example com  Example  3 - using curl config There s an even safer way to hand your credentials off to curl though  This method makes use of the -K switch    curl -X GET -K        lt  cat  lt  lt  lt  quot user     quot   lpass show --username example com    lpass show --password example com   quot  quot         http   example com  When used  your details remain hidden  since they re passed to curl via a temporary file descriptor  for example    curl -skK  dev fd 63 -XGET -H  Content-Type  application json  https   es-data-01a example com 9200  cat health    cat     lpass show --username example com     lpass show --password example com 1561075296 00 01 36 rdu-es-01 green 9 6 2171 1085 0 0 0 0 - 100 0          NOTE  Above I m communicating with one of our Elasticsearch nodes  inquiring about the cluster s health  This method is dynamically creating a file with the contents user    quot  lt username gt   lt password gt  quot  and giving that to curl  HTTP Basic Authorization The methods shown above are facilitating a feature known as Basic Authorization that s part of the HTTP standard   When the user agent wants to send authentication credentials to the server  it may use the Authorization field  The Authorization field is constructed as follows   The username and password are combined with a single colon      This means that the username itself cannot contain a colon  The resulting string is encoded into an octet sequence  The character set to use for this encoding is by default unspecified  as long as it is compatible with US-ASCII  but the server may suggest use of UTF-8 by sending the charset parameter  The resulting string is encoded using a variant of Base64  The authorization method and a space  e g   quot Basic  quot   is then prepended to the encoded string   For example  if the browser uses Aladdin as the username and OpenSesame as the password  then the field s value is the base64-encoding of Aladdin OpenSesame  or QWxhZGRpbjpPcGVuU2VzYW1l  Then the Authorization header will appear as  Authorization  Basic QWxhZGRpbjpPcGVuU2VzYW1l  Source  Basic access authentication

User · Answer

How do I set up the basic authorization    All you need to do is use -u  --user USER  PASSWORD   Behind the scenes curl builds the Authorization header with base64 encoded credentials for you   Example   curl -u username password -i -H  Accept application json  http   example com

User · Answer

curl -D- -X GET -H  Authorization  Basic ZnJlZDpmcmVk  -H  Content-Type  application json  http   localhost 7990 rest api 1 0 projects   --note  base46 encode  ZnJlZDpmcmVk

User · Answer

One way  provide --user flag as part of curl  as follows   curl --user username password http   example com   Another way is to get Base64 encoded token of  username password  from any online website like - https   www base64encode org  and pass it as Authorization header of curl as follows   curl -i -H  Authorization Basic dXNlcm5hbWU6cGFzc3dvcmQ   http   localhost 8080    Here  dXNlcm5hbWU6cGFzc3dvcmQ  is Base64 encoded token of username password

[curl] basic authorization command for curl

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