c76ad94492
This commit adds a build step to travis to auto-delete unstable archives older than 14 days (our regular release schedule) from Azure via ci.go purge. The commit also pulls in the latest Azure storage code, also switching over from the old import path (github.com/Azure/azure-sdk-for-go) to the new split one (github.com/Azure/azure-storage-go).
135 lines
3.6 KiB
Go
135 lines
3.6 KiB
Go
package jwt
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import (
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"crypto/subtle"
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"fmt"
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"time"
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)
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// For a type to be a Claims object, it must just have a Valid method that determines
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// if the token is invalid for any supported reason
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type Claims interface {
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Valid() error
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}
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// Structured version of Claims Section, as referenced at
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// https://tools.ietf.org/html/rfc7519#section-4.1
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// See examples for how to use this with your own claim types
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type StandardClaims struct {
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Audience string `json:"aud,omitempty"`
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ExpiresAt int64 `json:"exp,omitempty"`
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Id string `json:"jti,omitempty"`
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IssuedAt int64 `json:"iat,omitempty"`
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Issuer string `json:"iss,omitempty"`
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NotBefore int64 `json:"nbf,omitempty"`
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Subject string `json:"sub,omitempty"`
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}
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// Validates time based claims "exp, iat, nbf".
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// There is no accounting for clock skew.
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// As well, if any of the above claims are not in the token, it will still
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// be considered a valid claim.
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func (c StandardClaims) Valid() error {
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vErr := new(ValidationError)
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now := TimeFunc().Unix()
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// The claims below are optional, by default, so if they are set to the
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// default value in Go, let's not fail the verification for them.
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if c.VerifyExpiresAt(now, false) == false {
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delta := time.Unix(now, 0).Sub(time.Unix(c.ExpiresAt, 0))
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vErr.Inner = fmt.Errorf("token is expired by %v", delta)
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vErr.Errors |= ValidationErrorExpired
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}
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if c.VerifyIssuedAt(now, false) == false {
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vErr.Inner = fmt.Errorf("Token used before issued")
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vErr.Errors |= ValidationErrorIssuedAt
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}
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if c.VerifyNotBefore(now, false) == false {
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vErr.Inner = fmt.Errorf("token is not valid yet")
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vErr.Errors |= ValidationErrorNotValidYet
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}
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if vErr.valid() {
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return nil
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}
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return vErr
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}
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// Compares the aud claim against cmp.
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// If required is false, this method will return true if the value matches or is unset
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func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool {
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return verifyAud(c.Audience, cmp, req)
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}
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// Compares the exp claim against cmp.
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// If required is false, this method will return true if the value matches or is unset
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func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool {
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return verifyExp(c.ExpiresAt, cmp, req)
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}
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// Compares the iat claim against cmp.
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// If required is false, this method will return true if the value matches or is unset
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func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool {
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return verifyIat(c.IssuedAt, cmp, req)
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}
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// Compares the iss claim against cmp.
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// If required is false, this method will return true if the value matches or is unset
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func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool {
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return verifyIss(c.Issuer, cmp, req)
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}
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// Compares the nbf claim against cmp.
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// If required is false, this method will return true if the value matches or is unset
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func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
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return verifyNbf(c.NotBefore, cmp, req)
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}
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// ----- helpers
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func verifyAud(aud string, cmp string, required bool) bool {
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if aud == "" {
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return !required
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}
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if subtle.ConstantTimeCompare([]byte(aud), []byte(cmp)) != 0 {
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return true
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} else {
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return false
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}
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}
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func verifyExp(exp int64, now int64, required bool) bool {
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if exp == 0 {
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return !required
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}
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return now <= exp
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}
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func verifyIat(iat int64, now int64, required bool) bool {
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if iat == 0 {
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return !required
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}
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return now >= iat
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}
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func verifyIss(iss string, cmp string, required bool) bool {
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if iss == "" {
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return !required
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}
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if subtle.ConstantTimeCompare([]byte(iss), []byte(cmp)) != 0 {
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return true
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} else {
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return false
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}
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}
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func verifyNbf(nbf int64, now int64, required bool) bool {
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if nbf == 0 {
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return !required
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}
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return now >= nbf
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}
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