From 404aeae4545d2426c089a5f8d5e82dae56f5212b Mon Sep 17 00:00:00 2001 From: Rutger Broekhoff Date: Fri, 29 Dec 2023 21:31:53 +0100 Subject: Make Nix builds work --- vendor/github.com/minio/minio-go/v7/checksum.go | 210 ++++++++++++++++++++++++ 1 file changed, 210 insertions(+) create mode 100644 vendor/github.com/minio/minio-go/v7/checksum.go (limited to 'vendor/github.com/minio/minio-go/v7/checksum.go') diff --git a/vendor/github.com/minio/minio-go/v7/checksum.go b/vendor/github.com/minio/minio-go/v7/checksum.go new file mode 100644 index 0000000..a1f6f43 --- /dev/null +++ b/vendor/github.com/minio/minio-go/v7/checksum.go @@ -0,0 +1,210 @@ +/* + * MinIO Go Library for Amazon S3 Compatible Cloud Storage + * Copyright 2015-2023 MinIO, Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package minio + +import ( + "crypto/sha1" + "crypto/sha256" + "encoding/base64" + "hash" + "hash/crc32" + "io" + "math/bits" +) + +// ChecksumType contains information about the checksum type. +type ChecksumType uint32 + +const ( + + // ChecksumSHA256 indicates a SHA256 checksum. + ChecksumSHA256 ChecksumType = 1 << iota + // ChecksumSHA1 indicates a SHA-1 checksum. + ChecksumSHA1 + // ChecksumCRC32 indicates a CRC32 checksum with IEEE table. + ChecksumCRC32 + // ChecksumCRC32C indicates a CRC32 checksum with Castagnoli table. + ChecksumCRC32C + + // Keep after all valid checksums + checksumLast + + // checksumMask is a mask for valid checksum types. + checksumMask = checksumLast - 1 + + // ChecksumNone indicates no checksum. + ChecksumNone ChecksumType = 0 + + amzChecksumAlgo = "x-amz-checksum-algorithm" + amzChecksumCRC32 = "x-amz-checksum-crc32" + amzChecksumCRC32C = "x-amz-checksum-crc32c" + amzChecksumSHA1 = "x-amz-checksum-sha1" + amzChecksumSHA256 = "x-amz-checksum-sha256" +) + +// Is returns if c is all of t. +func (c ChecksumType) Is(t ChecksumType) bool { + return c&t == t +} + +// Key returns the header key. +// returns empty string if invalid or none. +func (c ChecksumType) Key() string { + switch c & checksumMask { + case ChecksumCRC32: + return amzChecksumCRC32 + case ChecksumCRC32C: + return amzChecksumCRC32C + case ChecksumSHA1: + return amzChecksumSHA1 + case ChecksumSHA256: + return amzChecksumSHA256 + } + return "" +} + +// RawByteLen returns the size of the un-encoded checksum. +func (c ChecksumType) RawByteLen() int { + switch c & checksumMask { + case ChecksumCRC32, ChecksumCRC32C: + return 4 + case ChecksumSHA1: + return sha1.Size + case ChecksumSHA256: + return sha256.Size + } + return 0 +} + +// Hasher returns a hasher corresponding to the checksum type. +// Returns nil if no checksum. +func (c ChecksumType) Hasher() hash.Hash { + switch c & checksumMask { + case ChecksumCRC32: + return crc32.NewIEEE() + case ChecksumCRC32C: + return crc32.New(crc32.MakeTable(crc32.Castagnoli)) + case ChecksumSHA1: + return sha1.New() + case ChecksumSHA256: + return sha256.New() + } + return nil +} + +// IsSet returns whether the type is valid and known. +func (c ChecksumType) IsSet() bool { + return bits.OnesCount32(uint32(c)) == 1 +} + +// String returns the type as a string. +// CRC32, CRC32C, SHA1, and SHA256 for valid values. +// Empty string for unset and "" if not valid. +func (c ChecksumType) String() string { + switch c & checksumMask { + case ChecksumCRC32: + return "CRC32" + case ChecksumCRC32C: + return "CRC32C" + case ChecksumSHA1: + return "SHA1" + case ChecksumSHA256: + return "SHA256" + case ChecksumNone: + return "" + } + return "" +} + +// ChecksumReader reads all of r and returns a checksum of type c. +// Returns any error that may have occurred while reading. +func (c ChecksumType) ChecksumReader(r io.Reader) (Checksum, error) { + h := c.Hasher() + if h == nil { + return Checksum{}, nil + } + _, err := io.Copy(h, r) + if err != nil { + return Checksum{}, err + } + return NewChecksum(c, h.Sum(nil)), nil +} + +// ChecksumBytes returns a checksum of the content b with type c. +func (c ChecksumType) ChecksumBytes(b []byte) Checksum { + h := c.Hasher() + if h == nil { + return Checksum{} + } + n, err := h.Write(b) + if err != nil || n != len(b) { + // Shouldn't happen with these checksummers. + return Checksum{} + } + return NewChecksum(c, h.Sum(nil)) +} + +// Checksum is a type and encoded value. +type Checksum struct { + Type ChecksumType + r []byte +} + +// NewChecksum sets the checksum to the value of b, +// which is the raw hash output. +// If the length of c does not match t.RawByteLen, +// a checksum with ChecksumNone is returned. +func NewChecksum(t ChecksumType, b []byte) Checksum { + if t.IsSet() && len(b) == t.RawByteLen() { + return Checksum{Type: t, r: b} + } + return Checksum{} +} + +// NewChecksumString sets the checksum to the value of s, +// which is the base 64 encoded raw hash output. +// If the length of c does not match t.RawByteLen, it is not added. +func NewChecksumString(t ChecksumType, s string) Checksum { + b, _ := base64.StdEncoding.DecodeString(s) + if t.IsSet() && len(b) == t.RawByteLen() { + return Checksum{Type: t, r: b} + } + return Checksum{} +} + +// IsSet returns whether the checksum is valid and known. +func (c Checksum) IsSet() bool { + return c.Type.IsSet() && len(c.r) == c.Type.RawByteLen() +} + +// Encoded returns the encoded value. +// Returns the empty string if not set or valid. +func (c Checksum) Encoded() string { + if !c.IsSet() { + return "" + } + return base64.StdEncoding.EncodeToString(c.r) +} + +// Raw returns the raw checksum value if set. +func (c Checksum) Raw() []byte { + if !c.IsSet() { + return nil + } + return c.r +} -- cgit v1.2.3