kopia lustrzana https://github.com/reiver/greatape
79 wiersze
1.8 KiB
Go
79 wiersze
1.8 KiB
Go
package httpsig
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import (
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"crypto"
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"crypto/rsa"
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)
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// RSASHA1 implements RSA PKCS1v15 signatures over a SHA1 digest
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var RSASHA1 Algorithm = rsa_sha1{}
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type rsa_sha1 struct{}
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func (rsa_sha1) Name() string {
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return "rsa-sha1"
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}
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func (a rsa_sha1) Sign(key interface{}, data []byte) ([]byte, error) {
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k := toRSAPrivateKey(key)
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if k == nil {
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return nil, unsupportedAlgorithm(a)
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}
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return RSASign(k, crypto.SHA1, data)
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}
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func (a rsa_sha1) Verify(key interface{}, data, sig []byte) error {
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k := toRSAPublicKey(key)
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if k == nil {
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return unsupportedAlgorithm(a)
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}
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return RSAVerify(k, crypto.SHA1, data, sig)
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}
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// RSASHA256 implements RSA PKCS1v15 signatures over a SHA256 digest
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var RSASHA256 Algorithm = rsa_sha256{}
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type rsa_sha256 struct{}
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func (rsa_sha256) Name() string {
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return "rsa-sha256"
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}
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func (a rsa_sha256) Sign(key interface{}, data []byte) ([]byte, error) {
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k := toRSAPrivateKey(key)
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if k == nil {
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return nil, unsupportedAlgorithm(a)
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}
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return RSASign(k, crypto.SHA256, data)
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}
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func (a rsa_sha256) Verify(key interface{}, data, sig []byte) error {
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k := toRSAPublicKey(key)
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if k == nil {
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return unsupportedAlgorithm(a)
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}
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return RSAVerify(k, crypto.SHA256, data, sig)
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}
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// RSASign signs a digest of the data hashed using the provided hash
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func RSASign(key *rsa.PrivateKey, hash crypto.Hash, data []byte) (
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signature []byte, err error) {
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h := hash.New()
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if _, err := h.Write(data); err != nil {
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return nil, err
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}
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return rsa.SignPKCS1v15(Rand, key, hash, h.Sum(nil))
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}
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// RSAVerify verifies a signed digest of the data hashed using the provided hash
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func RSAVerify(key *rsa.PublicKey, hash crypto.Hash, data, sig []byte) (
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err error) {
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h := hash.New()
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if _, err := h.Write(data); err != nil {
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return err
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}
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return rsa.VerifyPKCS1v15(key, hash, h.Sum(nil), sig)
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}
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