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signature.go
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signature.go
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package jwt
import (
"crypto"
"crypto/rsa"
)
const (
SignatureES256 signature = "ES256"
SignatureES384 signature = "ES384"
SignatureES512 signature = "ES512"
SignatureRS256 signature = "RS256"
SignatureRS384 signature = "RS384"
SignatureRS512 signature = "RS512"
SignaturePS256 signature = "PS256"
SignaturePS384 signature = "PS384"
SignaturePS512 signature = "PS512"
SignatureHS256 signature = "HS256"
SignatureHS384 signature = "HS384"
SignatureHS512 signature = "HS512"
SignatureNONE signature = "NONE"
)
type signature string
type isignature interface {
Verify(headerAndClaims []byte, signature []byte, key interface{}) error
Signature(headerAndClaims []byte, key interface{}) ([]byte, error)
Algorithm() string
}
var signatureMethods = map[signature]isignature{
SignatureES256: &signatureECDSA{Name: string(SignatureES256), Hash: crypto.SHA256, KeySize: 32, CurveBits: 256},
SignatureES384: &signatureECDSA{Name: string(SignatureES384), Hash: crypto.SHA384, KeySize: 48, CurveBits: 384},
SignatureES512: &signatureECDSA{Name: string(SignatureES512), Hash: crypto.SHA512, KeySize: 66, CurveBits: 521},
SignatureRS256: &signatureRSA{Name: string(SignatureRS256), Hash: crypto.SHA256},
SignatureRS384: &signatureRSA{Name: string(SignatureRS384), Hash: crypto.SHA384},
SignatureRS512: &signatureRSA{Name: string(SignatureRS512), Hash: crypto.SHA512},
SignaturePS256: &signatureRSAPSS{signatureRSA: &signatureRSA{Name: string(SignaturePS256), Hash: crypto.SHA256}, Options: &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthAuto, Hash: crypto.SHA256}},
SignaturePS384: &signatureRSAPSS{signatureRSA: &signatureRSA{Name: string(SignaturePS384), Hash: crypto.SHA384}, Options: &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthAuto, Hash: crypto.SHA384}},
SignaturePS512: &signatureRSAPSS{signatureRSA: &signatureRSA{Name: string(SignaturePS512), Hash: crypto.SHA512}, Options: &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthAuto, Hash: crypto.SHA512}},
SignatureHS256: &signatureHMAC{string(SignatureHS256), crypto.SHA256},
SignatureHS384: &signatureHMAC{string(SignatureHS384), crypto.SHA384},
SignatureHS512: &signatureHMAC{string(SignatureHS512), crypto.SHA512},
SignatureNONE: &signatureNone{Name: string(SignatureNONE)},
}