ceph-csi/vendor/github.com/aws/smithy-go/encoding/encoding.go
Rakshith R 4f0bb2315b rbd: add aws-sts-metdata encryption type
With Amazon STS and kubernetes cluster is configured with
OIDC identity provider, credentials to access Amazon KMS
can be fetched using oidc-token(serviceaccount token).
Each tenant/namespace needs to create a secret with aws region,
role and CMK ARN.
Ceph-CSI will assume the given role with oidc token and access
aws KMS, with given CMK to encrypt/decrypt DEK which will stored
in the image metdata.

Refer: https://docs.aws.amazon.com/STS/latest/APIReference/welcome.html
Resolves: #2879

Signed-off-by: Rakshith R <rar@redhat.com>
2022-03-16 07:29:56 +00:00

41 lines
983 B
Go

package encoding
import (
"fmt"
"math"
"strconv"
)
// EncodeFloat encodes a float value as per the stdlib encoder for json and xml protocol
// This encodes a float value into dst while attempting to conform to ES6 ToString for Numbers
//
// Based on encoding/json floatEncoder from the Go Standard Library
// https://golang.org/src/encoding/json/encode.go
func EncodeFloat(dst []byte, v float64, bits int) []byte {
if math.IsInf(v, 0) || math.IsNaN(v) {
panic(fmt.Sprintf("invalid float value: %s", strconv.FormatFloat(v, 'g', -1, bits)))
}
abs := math.Abs(v)
fmt := byte('f')
if abs != 0 {
if bits == 64 && (abs < 1e-6 || abs >= 1e21) || bits == 32 && (float32(abs) < 1e-6 || float32(abs) >= 1e21) {
fmt = 'e'
}
}
dst = strconv.AppendFloat(dst, v, fmt, -1, bits)
if fmt == 'e' {
// clean up e-09 to e-9
n := len(dst)
if n >= 4 && dst[n-4] == 'e' && dst[n-3] == '-' && dst[n-2] == '0' {
dst[n-2] = dst[n-1]
dst = dst[:n-1]
}
}
return dst
}