"verify"
********

* Description

* Usage

* Required Parameters

* Optional Parameters

* Global Parameters

* Example using required parameter


Description
===========

Verifies a digital signature that was generated by the Sign operation
by using the public key of the same asymmetric key that was used to
sign the data. If you want to validate the digital signature outside
of the service, you can do so by using the public key of the
asymmetric key.

The top level –endpoint parameter must be supplied for this operation.


Usage
=====

   oci kms crypto verified-data verify [OPTIONS]


Required Parameters
===================

--key-id [text]

The OCID of the key used to sign the message.

--key-version-id [text]

The OCID of the key version used to sign the message.

--message [text]

The base64-encoded binary data object denoting the message or message
digest to sign. You can have a message up to 4096 bytes in size. To
sign a larger message, provide the message digest.

--signature [text]

The base64-encoded binary data object denoting the cryptographic
signature generated for the message.

--signing-algorithm [text]

The algorithm to use to sign the message or message digest. For RSA
keys, supported signature schemes include PKCS #1 and RSASSA-PSS,
along with different hashing algorithms. For ECDSA keys, ECDSA is the
supported signature scheme with different hashing algorithms. When you
pass a message digest for signing, ensure that you specify the same
hashing algorithm as used when creating the message digest.

Accepted values are:

   ECDSA_SHA_256, ECDSA_SHA_384, ECDSA_SHA_512, SHA_224_RSA_PKCS1_V1_5, SHA_224_RSA_PKCS_PSS, SHA_256_RSA_PKCS1_V1_5, SHA_256_RSA_PKCS_PSS, SHA_384_RSA_PKCS1_V1_5, SHA_384_RSA_PKCS_PSS, SHA_512_RSA_PKCS1_V1_5, SHA_512_RSA_PKCS_PSS


Optional Parameters
===================

--from-json [text]

Provide input to this command as a JSON document from a file using the
file://path-to/file syntax.

The "--generate-full-command-json-input" option can be used to
generate a sample json file to be used with this command option. The
key names are pre-populated and match the command option names
(converted to camelCase format, e.g. compartment-id –> compartmentId),
while the values of the keys need to be populated by the user before
using the sample file as an input to this command. For any command
option that accepts multiple values, the value of the key can be a
JSON array.

Options can still be provided on the command line. If an option exists
in both the JSON document and the command line then the command line
specified value will be used.

For examples on usage of this option, please see our “using CLI with
advanced JSON options” link: https://docs.cloud.oracle.com/iaas/Conte
nt/API/SDKDocs/cliusing.htm#AdvancedJSONOptions

--message-type [text]

Denotes whether the value of the message parameter is a raw message or
a message digest. The default value, *RAW*, indicates a message. To
indicate a message digest, use *DIGEST*.

Accepted values are:

   DIGEST, RAW


Global Parameters
=================

Use "oci --help" for help on global parameters.

"--auth-purpose", "--auth", "--cert-bundle", "--cli-auto-prompt", "--
cli-rc-file", "--config-file", "--connection-timeout", "--debug", "--
defaults-file", "--endpoint", "--generate-full-command-json-input", "
--generate-param-json-input", "--help", "--latest-version", "--max-
retries", "--no-retry", "--opc-client-request-id", "--opc-request-id",
"--output", "--profile", "--query", "--raw-output", "--read-timeout",
"--region", "--release-info", "--request-id", "--version", "-?", "-d",
"-h", "-i", "-v"


Example using required parameter
================================

Copy and paste the following example into a JSON file, replacing the
example parameters with your own.

       oci kms management key create --generate-param-json-input key-shape > key-shape.json

Copy the following CLI commands into a file named example.sh. Run the
command by typing “bash example.sh” and replacing the example
parameters with your own.

Please note this sample will only work in the POSIX-compliant bash-
like shell. You need to set up the OCI configuration and appropriate
security policies before trying the examples.

       export compartment_id=<substitute-value-of-compartment_id> # https://docs.cloud.oracle.com/en-us/iaas/tools/oci-cli/latest/oci_cli_docs/cmdref/kms/management/key/create.html#cmdoption-compartment-id
       export display_name=<substitute-value-of-display_name> # https://docs.cloud.oracle.com/en-us/iaas/tools/oci-cli/latest/oci_cli_docs/cmdref/kms/management/key/create.html#cmdoption-display-name
       export key_id=<substitute-value-of-key_id> # https://docs.cloud.oracle.com/en-us/iaas/tools/oci-cli/latest/oci_cli_docs/cmdref/kms/management/key-version/create.html#cmdoption-key-id
       export message=<substitute-value-of-message> # https://docs.cloud.oracle.com/en-us/iaas/tools/oci-cli/latest/oci_cli_docs/cmdref/kms/crypto/verified-data/verify.html#cmdoption-message
       export signature=<substitute-value-of-signature> # https://docs.cloud.oracle.com/en-us/iaas/tools/oci-cli/latest/oci_cli_docs/cmdref/kms/crypto/verified-data/verify.html#cmdoption-signature
       export signing_algorithm=<substitute-value-of-signing_algorithm> # https://docs.cloud.oracle.com/en-us/iaas/tools/oci-cli/latest/oci_cli_docs/cmdref/kms/crypto/verified-data/verify.html#cmdoption-signing-algorithm

       key_id=$(oci kms management key create --compartment-id $compartment_id --display-name $display_name --endpoint https://region.domain.com --key-shape file://key-shape.json --query data.id --raw-output)

       key_version_id=$(oci kms management key-version create --key-id $key_id --query data.id --raw-output)

       oci kms crypto verified-data verify --key-id $key_id --key-version-id $key_version_id --message $message --signature $signature --signing-algorithm $signing_algorithm
