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Moving claim information into claims.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,193 @@ | ||
| package jwt | ||
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| import "crypto/subtle" | ||
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| // For a type to be a Claims object, it must just have a Valid method that determines | ||
| // if the token is invalid for any supported reason | ||
| type Claims interface { | ||
| Valid() error | ||
| } | ||
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| // Structured version of Claims Section, as referenced at | ||
| // https://tools.ietf.org/html/rfc7519#section-4.1 | ||
| type StandardClaims struct { | ||
| Audience string `json:"aud,omitempty"` | ||
| ExpiresAt int64 `json:"exp,omitempty"` | ||
| Id string `json:"jti,omitempty"` | ||
| IssuedAt int64 `json:"iat,omitempty"` | ||
| Issuer string `json:"iss,omitempty"` | ||
| NotBefore int64 `json:"nbf,omitempty"` | ||
| Subject string `json:"sub,omitempty"` | ||
| } | ||
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| // Validates time based claims "exp, iat, nbf". | ||
| // There is no accounting for clock skew. | ||
| // As well, if any of the above claims are not in the token, it will still | ||
| // be considered a valid claim. | ||
| func (c StandardClaims) Valid() error { | ||
| vErr := new(ValidationError) | ||
| now := TimeFunc().Unix() | ||
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| // The claims below are optional, by default, so if they are set to the | ||
| // default value in Go, let's not fail the verification for them. | ||
| if c.VerifyExpiresAt(now, false) == false { | ||
| vErr.err = "Token is expired" | ||
| vErr.Errors |= ValidationErrorExpired | ||
| } | ||
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| if c.VerifyIssuedAt(now, false) == false { | ||
| vErr.err = "Token used before issued, clock skew issue?" | ||
| vErr.Errors |= ValidationErrorIssuedAt | ||
| } | ||
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| if c.VerifyNotBefore(now, false) == false { | ||
| vErr.err = "Token is not valid yet" | ||
| vErr.Errors |= ValidationErrorNotValidYet | ||
| } | ||
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| if vErr.valid() { | ||
| return nil | ||
| } | ||
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| return vErr | ||
| } | ||
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| // Compares the aud claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool { | ||
| return verifyAud(c.Audience, cmp, req) | ||
| } | ||
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| // Compares the exp claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool { | ||
| return verifyExp(c.ExpiresAt, cmp, req) | ||
| } | ||
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| // Compares the iat claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool { | ||
| return verifyIat(c.IssuedAt, cmp, req) | ||
| } | ||
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| // Compares the iss claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool { | ||
| return verifyIss(c.Issuer, cmp, req) | ||
| } | ||
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| // Compares the nbf claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool { | ||
| return verifyNbf(c.NotBefore, cmp, req) | ||
| } | ||
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| type MapClaim map[string]interface{} | ||
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| // Compares the aud claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (m MapClaim) VerifyAudience(cmp string, req bool) bool { | ||
| aud, _ := m["aud"].(string) | ||
| return verifyAud(aud, cmp, req) | ||
| } | ||
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| // Compares the exp claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (m MapClaim) VerifyExpiresAt(cmp int64, req bool) bool { | ||
| exp, _ := m["exp"].(float64) | ||
| return verifyExp(int64(exp), cmp, req) | ||
| } | ||
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| // Compares the iat claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (m MapClaim) VerifyIssuedAt(cmp int64, req bool) bool { | ||
| iat, _ := m["iat"].(float64) | ||
| return verifyIat(int64(iat), cmp, req) | ||
| } | ||
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| // Compares the iss claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (m MapClaim) VerifyIssuer(cmp string, req bool) bool { | ||
| iss, _ := m["iss"].(string) | ||
| return verifyIss(iss, cmp, req) | ||
| } | ||
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| // Compares the nbf claim against cmp. | ||
| // If required is false, this method will return true if the value matches or is unset | ||
| func (m MapClaim) VerifyNotBefore(cmp int64, req bool) bool { | ||
| nbf, _ := m["nbf"].(float64) | ||
| return verifyNbf(int64(nbf), cmp, req) | ||
| } | ||
|
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| // Validates time based claims "exp, iat, nbf". | ||
| // There is no accounting for clock skew. | ||
| // As well, if any of the above claims are not in the token, it will still | ||
| // be considered a valid claim. | ||
| func (m MapClaim) Valid() error { | ||
| vErr := new(ValidationError) | ||
| now := TimeFunc().Unix() | ||
|
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| if m.VerifyExpiresAt(now, false) == false { | ||
| vErr.err = "Token is expired" | ||
| vErr.Errors |= ValidationErrorExpired | ||
| } | ||
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| if m.VerifyIssuedAt(now, false) == false { | ||
| vErr.err = "Token used before issued, clock skew issue?" | ||
| vErr.Errors |= ValidationErrorIssuedAt | ||
| } | ||
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| if m.VerifyNotBefore(now, false) == false { | ||
| vErr.err = "Token is not valid yet" | ||
| vErr.Errors |= ValidationErrorNotValidYet | ||
| } | ||
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| if vErr.valid() { | ||
| return nil | ||
| } | ||
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| return vErr | ||
| } | ||
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| func verifyAud(aud string, cmp string, required bool) bool { | ||
| if aud == "" { | ||
| return !required | ||
| } | ||
| if subtle.ConstantTimeCompare([]byte(aud), []byte(cmp)) != 0 { | ||
| return true | ||
| } else { | ||
| return false | ||
| } | ||
| } | ||
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| func verifyExp(exp int64, now int64, required bool) bool { | ||
| if exp == 0 { | ||
| return !required | ||
| } | ||
| return now <= exp | ||
| } | ||
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| func verifyIat(iat int64, now int64, required bool) bool { | ||
| if iat == 0 { | ||
| return !required | ||
| } | ||
| return now >= iat | ||
| } | ||
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| func verifyIss(iss string, cmp string, required bool) bool { | ||
| if iss == "" { | ||
| return !required | ||
| } | ||
| if subtle.ConstantTimeCompare([]byte(iss), []byte(cmp)) != 0 { | ||
| return true | ||
| } else { | ||
| return false | ||
| } | ||
| } | ||
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| func verifyNbf(nbf int64, now int64, required bool) bool { | ||
| if nbf == 0 { | ||
| return !required | ||
| } | ||
| return now >= nbf | ||
| } |
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