checksum

package module
v1.9.12 Latest Latest
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 Go to latest Published: Mar 13, 2026 License: Apache-2.0 Imports: 25 Imported by: 0

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Constants

This section is empty.

Variables

This section is empty.

Functions

func AddInputMiddleware deprecated 

func AddInputMiddleware(stack *middleware.Stack, options InputMiddlewareOptions) (err error)

AddInputMiddleware adds the middleware for performing checksum computing of request payloads, and checksum validation of response payloads.

Deprecated: This internal-only runtime API is frozen. Do not call or modify it in new code. Checksum-enabled service operations now generate this middleware setup code inline per #2507.

func AddOutputMiddleware 

func AddOutputMiddleware(stack *middleware.Stack, options OutputMiddlewareOptions) error

AddOutputMiddleware adds the middleware for validating response payload's checksum.

func AlgorithmChecksumLength 

func AlgorithmChecksumLength(v Algorithm) (int, error)

AlgorithmChecksumLength returns the length of the algorithm's checksum in bytes. If the algorithm is not known, an error is returned.

func AlgorithmHTTPHeader 

func AlgorithmHTTPHeader(v Algorithm) string

AlgorithmHTTPHeader returns the HTTP header for the algorithm's hash.

func GetComputedInputChecksums 

func GetComputedInputChecksums(m middleware.Metadata) (map[string]string, bool)

GetComputedInputChecksums returns the map of checksum algorithm to their computed value stored in the middleware Metadata. Returns false if no values were stored in the Metadata.

func GetOutputValidationAlgorithmsUsed 

func GetOutputValidationAlgorithmsUsed(m middleware.Metadata) ([]string, bool)

GetOutputValidationAlgorithmsUsed returns the checksum algorithms used stored in the middleware Metadata. Returns false if no algorithms were stored in the Metadata.

func NewAlgorithmHash 

func NewAlgorithmHash(v Algorithm) (hash.Hash, error)

NewAlgorithmHash returns a hash.Hash for the checksum algorithm. Error is returned if the algorithm is unknown.

func RemoveInputMiddleware 

func RemoveInputMiddleware(stack *middleware.Stack)

RemoveInputMiddleware Removes the compute input payload checksum middleware handlers from the stack.

func RemoveOutputMiddleware 

func RemoveOutputMiddleware(stack *middleware.Stack)

RemoveOutputMiddleware Removes the compute input payload checksum middleware handlers from the stack.

func SetComputedInputChecksums 

func SetComputedInputChecksums(m *middleware.Metadata, vs map[string]string)

SetComputedInputChecksums stores the map of checksum algorithm to their computed value in the middleware Metadata. Overwrites any values that currently exist in the metadata.

func SetOutputValidationAlgorithmsUsed 

func SetOutputValidationAlgorithmsUsed(m *middleware.Metadata, vs []string)

SetOutputValidationAlgorithmsUsed stores the checksum algorithms used in the middleware Metadata.

Types

type AddInputChecksumTrailer added in v1.5.2 

type AddInputChecksumTrailer struct {
	EnableTrailingChecksum           bool
	EnableComputePayloadHash         bool
	EnableDecodedContentLengthHeader bool
	// contains filtered or unexported fields
}

AddInputChecksumTrailer adds HTTP checksum when

  • Is HTTPS, not HTTP
  • A checksum was specified via the Input
  • Trailing checksums are supported.

func (*AddInputChecksumTrailer) HandleFinalize added in v1.5.2 

func (m *AddInputChecksumTrailer) HandleFinalize(
	ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler,
) (
	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
)

HandleFinalize wraps the request body to write the trailing checksum.

func (*AddInputChecksumTrailer) ID added in v1.5.2 

func (*AddInputChecksumTrailer) ID() string

ID identifies this middleware.

type Algorithm 

type Algorithm string

Algorithm represents the checksum algorithms supported 

const (
	// AlgorithmCRC32C represents CRC32C hash algorithm
	AlgorithmCRC32C Algorithm = "CRC32C"

	// AlgorithmCRC32 represents CRC32 hash algorithm
	AlgorithmCRC32 Algorithm = "CRC32"

	// AlgorithmSHA1 represents SHA1 hash algorithm
	AlgorithmSHA1 Algorithm = "SHA1"

	// AlgorithmSHA256 represents SHA256 hash algorithm
	AlgorithmSHA256 Algorithm = "SHA256"

	// AlgorithmCRC64NVME represents CRC64NVME hash algorithm
	AlgorithmCRC64NVME Algorithm = "CRC64NVME"
)

Enumeration values for supported checksum Algorithms.

func FilterSupportedAlgorithms 

func FilterSupportedAlgorithms(vs []string) []Algorithm

FilterSupportedAlgorithms filters the set of algorithms, returning a slice of algorithms that are supported.

func ParseAlgorithm 

func ParseAlgorithm(v string) (Algorithm, error)

ParseAlgorithm attempts to parse the provided value into a checksum algorithm, matching without case. Returns the algorithm matched, or an error if the algorithm wasn't matched.

func (Algorithm) String 

func (a Algorithm) String() string

type ComputeInputPayloadChecksum added in v1.5.2 

type ComputeInputPayloadChecksum struct {
	// Enables support for wrapping the serialized input payload with a
	// content-encoding: aws-check wrapper, and including a trailer for the
	// algorithm's checksum value.
	//
	// The checksum will not be computed, nor added as trailing checksum, if
	// the Algorithm's header is already set on the request.
	EnableTrailingChecksum bool

	// Enables support for computing the SHA256 checksum of input payloads
	// along with the algorithm specified checksum. Prevents downstream
	// middleware handlers (computePayloadSHA256) re-reading the payload.
	//
	// The SHA256 payload hash will only be used for computed for requests
	// that are not TLS, or do not enable trailing checksums.
	//
	// The SHA256 payload hash will not be computed, if the Algorithm's header
	// is already set on the request.
	EnableComputePayloadHash bool

	// Enables support for setting the aws-chunked decoded content length
	// header for the decoded length of the underlying stream. Will only be set
	// when used with trailing checksums, and aws-chunked content-encoding.
	EnableDecodedContentLengthHeader bool
	// contains filtered or unexported fields
}

ComputeInputPayloadChecksum middleware computes payload checksum

func (*ComputeInputPayloadChecksum) HandleFinalize added in v1.5.2 

func (m *ComputeInputPayloadChecksum) HandleFinalize(
	ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler,
) (
	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
)

HandleFinalize handles computing the payload's checksum, in the following cases:

  • Is HTTP, not HTTPS
  • RequireChecksum is true, and no checksums were specified via the Input
  • Trailing checksums are not supported

The build handler must be inserted in the stack before ContentPayloadHash and after ComputeContentLength.

func (*ComputeInputPayloadChecksum) ID added in v1.5.2 

func (m *ComputeInputPayloadChecksum) ID() string

ID provides the middleware's identifier.

type InputMiddlewareOptions 

type InputMiddlewareOptions struct {
	// GetAlgorithm is a function to get the checksum algorithm of the
	// input payload from the input parameters.
	//
	// Given the input parameter value, the function must return the algorithm
	// and true, or false if no algorithm is specified.
	GetAlgorithm func(any) (string, bool)

	// RequireChecksum indicates whether operation model forces middleware to compute the input payload's checksum.
	// If RequireChecksum is set to true, checksum will be calculated and RequestChecksumCalculation will be ignored,
	// otherwise RequestChecksumCalculation will be used to indicate if checksum will be calculated
	RequireChecksum bool

	// RequestChecksumCalculation is the user config to opt-in/out request checksum calculation. If RequireChecksum is
	// set to true, checksum will be calculated and this field will be ignored, otherwise
	// RequestChecksumCalculation will be used to indicate if checksum will be calculated
	RequestChecksumCalculation aws.RequestChecksumCalculation

	// Enables support for wrapping the serialized input payload with a
	// content-encoding: aws-check wrapper, and including a trailer for the
	// algorithm's checksum value.
	//
	// The checksum will not be computed, nor added as trailing checksum, if
	// the Algorithm's header is already set on the request.
	EnableTrailingChecksum bool

	// Enables support for computing the SHA256 checksum of input payloads
	// along with the algorithm specified checksum. Prevents downstream
	// middleware handlers (computePayloadSHA256) re-reading the payload.
	//
	// The SHA256 payload checksum will only be used for computed for requests
	// that are not TLS, or do not enable trailing checksums.
	//
	// The SHA256 payload hash will not be computed, if the Algorithm's header
	// is already set on the request.
	EnableComputeSHA256PayloadHash bool

	// Enables support for setting the aws-chunked decoded content length
	// header for the decoded length of the underlying stream. Will only be set
	// when used with trailing checksums, and aws-chunked content-encoding.
	EnableDecodedContentLengthHeader bool
}

InputMiddlewareOptions provides the options for the request checksum middleware setup.

type OutputMiddlewareOptions 

type OutputMiddlewareOptions struct {
	// GetValidationMode is a function to get the checksum validation
	// mode of the output payload from the input parameters.
	//
	// Given the input parameter value, the function must return the validation
	// mode and true, or false if no mode is specified.
	GetValidationMode func(any) (string, bool)

	// SetValidationMode is a function to set the checksum validation mode of input parameters
	SetValidationMode func(any, string)

	// ResponseChecksumValidation is the user config to opt-in/out response checksum validation
	ResponseChecksumValidation aws.ResponseChecksumValidation

	// The set of checksum algorithms that should be used for response payload
	// checksum validation. The algorithm(s) used will be a union of the
	// output's returned algorithms and this set.
	//
	// Only the first algorithm in the union is currently used.
	ValidationAlgorithms []string

	// If set the middleware will ignore output multipart checksums. Otherwise
	// a checksum format error will be returned by the middleware.
	IgnoreMultipartValidation bool

	// When set the middleware will log when output does not have checksum or
	// algorithm to validate.
	LogValidationSkipped bool

	// When set the middleware will log when the output contains a multipart
	// checksum that was, skipped and not validated.
	LogMultipartValidationSkipped bool
}

OutputMiddlewareOptions provides options for configuring output checksum validation middleware.

type RequestChecksumMetricsTracking added in v1.5.0 

type RequestChecksumMetricsTracking struct {
	RequestChecksumCalculation aws.RequestChecksumCalculation
	UserAgent                  *awsmiddleware.RequestUserAgent
}

RequestChecksumMetricsTracking is the middleware to track operation request's checksum usage

func (*RequestChecksumMetricsTracking) HandleBuild added in v1.5.0 

func (m *RequestChecksumMetricsTracking) HandleBuild(
	ctx context.Context, in middleware.BuildInput, next middleware.BuildHandler,
) (
	out middleware.BuildOutput, metadata middleware.Metadata, err error,
)

HandleBuild checks request checksum config and checksum value sent and sends corresponding feature id to user agent

func (*RequestChecksumMetricsTracking) ID added in v1.5.0 

func (m *RequestChecksumMetricsTracking) ID() string

ID provides the middleware identifier

type ResponseChecksumMetricsTracking added in v1.5.0 

type ResponseChecksumMetricsTracking struct {
	ResponseChecksumValidation aws.ResponseChecksumValidation
	UserAgent                  *awsmiddleware.RequestUserAgent
}

ResponseChecksumMetricsTracking is the middleware to track operation response's checksum usage

func (*ResponseChecksumMetricsTracking) HandleBuild added in v1.5.0 

func (m *ResponseChecksumMetricsTracking) HandleBuild(
	ctx context.Context, in middleware.BuildInput, next middleware.BuildHandler,
) (
	out middleware.BuildOutput, metadata middleware.Metadata, err error,
)

HandleBuild checks the response checksum config and sends corresponding feature id to user agent

func (*ResponseChecksumMetricsTracking) ID added in v1.5.0 

func (m *ResponseChecksumMetricsTracking) ID() string

ID provides the middleware identifier

type SetupInputContext added in v1.5.2 

type SetupInputContext struct {
	// GetAlgorithm is a function to get the checksum algorithm of the
	// input payload from the input parameters.
	//
	// Given the input parameter value, the function must return the algorithm
	// and true, or false if no algorithm is specified.
	GetAlgorithm func(any) (string, bool)

	// RequireChecksum indicates whether operation model forces middleware to compute the input payload's checksum.
	// If RequireChecksum is set to true, checksum will be calculated and RequestChecksumCalculation will be ignored,
	// otherwise RequestChecksumCalculation will be used to indicate if checksum will be calculated
	RequireChecksum bool

	// RequestChecksumCalculation is the user config to opt-in/out request checksum calculation. If RequireChecksum is
	// set to true, checksum will be calculated and this field will be ignored, otherwise
	// RequestChecksumCalculation will be used to indicate if checksum will be calculated
	RequestChecksumCalculation aws.RequestChecksumCalculation
}

SetupInputContext is the initial middleware that looks up the input used to configure checksum behavior. This middleware must be executed before input validation step or any other checksum middleware.

func (*SetupInputContext) HandleInitialize added in v1.5.2 

func (m *SetupInputContext) HandleInitialize(
	ctx context.Context, in middleware.InitializeInput, next middleware.InitializeHandler,
) (
	out middleware.InitializeOutput, metadata middleware.Metadata, err error,
)

HandleInitialize initialization middleware that setups up the checksum context based on the input parameters provided in the stack.

func (*SetupInputContext) ID added in v1.5.2 

func (m *SetupInputContext) ID() string

ID for the middleware

Source Files

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