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https://github.com/gregtwallace/apc-p15-tool.git
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35 lines
703 B
Go
35 lines
703 B
Go
package pkcs15
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import (
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"apc-p15-tool/pkg/tools/asn1obj"
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"crypto/sha1"
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"math/big"
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)
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// keyId returns the keyId for the overall key object
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func (p15 *pkcs15KeyCert) keyId() []byte {
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// Create Object to hash
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hashObj := asn1obj.Sequence([][]byte{
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asn1obj.Sequence([][]byte{
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// Key is RSA
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asn1obj.ObjectIdentifier(asn1obj.OIDrsaEncryptionPKCS1),
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asn1obj.Null(),
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}),
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// BIT STRING of rsa key public key
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asn1obj.BitString(
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asn1obj.Sequence([][]byte{
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asn1obj.Integer(p15.key.N),
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asn1obj.Integer((big.NewInt(int64(p15.key.E)))),
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}),
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),
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})
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// SHA-1 Hash
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hasher := sha1.New()
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_, err := hasher.Write(hashObj)
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if err != nil {
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panic(err)
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}
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return hasher.Sum(nil)
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}
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