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gcloud storage hash

NAME
gcloud storage hash - calculates hashes on local or cloud files
SYNOPSIS
gcloud storage hash URLS [URLS …] [--additional-headers=HEADER=VALUE] [--hex] [--skip-crc32c     | --skip-md5] [--decryption-keys=[DECRYPTION_KEY,…]] [GCLOUD_WIDE_FLAG …]
DESCRIPTION
Calculates hashes on local or cloud files that can be used to compare with "gcloud storage ls -L" output. If a specific hash option is not provided, this command calculates all gcloud storage-supported hashes for the file.

Note that gcloud storage automatically performs hash validation when uploading or downloading files, so this command is only needed if you want to write a script that separately checks the hash for some reason.

If you calculate a CRC32C hash for the file without a precompiled google-crc32c installation, hashing will be very slow.
EXAMPLES
To get the MD5 and CRC32C hash digest of a cloud object in Base64 format: 
gcloud storage hash gs://bucket/object

To get just the MD5 hash digest of a local object in hex format: 

gcloud storage hash /dir/object.txt --skip-crc32c --hex
POSITIONAL ARGUMENTS
URLS [URLS …]
Local or cloud URLs of objects to hash.
FLAGS
--additional-headers=HEADER=VALUE
Includes arbitrary headers in storage API calls. Accepts a comma separated list of key=value pairs, e.g. header1=value1,header2=value2. Overrides the default storage/additional_headers property value for this command invocation.
--hex
Output hash digests in hex format. By default, digests are displayed in base64.
At most one of these can be specified:
--skip-crc32c
Skip CRC32C hash calculation. Useful if command is running slow.
--skip-md5
Skip MD5 hash calculation. Useful if command is running slow.
ENCRYPTION FLAGS
--decryption-keys=[DECRYPTION_KEY,…]
A comma-separated list of customer-supplied encryption keys (RFC 4648 section 4 base64-encoded AES256 strings) that will be used to decrypt Cloud Storage objects. Data encrypted with a customer-managed encryption key (CMEK) is decrypted automatically, so CMEKs do not need to be listed here.
GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES
This variant is also available: 
gcloud alpha storage hash