44 lines
1.4 KiB
Go
44 lines
1.4 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package bootstrap
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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)
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const oauth2SigningKeyBits = 2048
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// GenerateOAuth2SigningKey returns a freshly generated 2048-bit RSA
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// private key PKCS#1-encoded as PEM.
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func GenerateOAuth2SigningKey() (string, error) {
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privateKey, err := rsa.GenerateKey(rand.Reader, oauth2SigningKeyBits)
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if err != nil {
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return "", fmt.Errorf("generate RSA key: %w", err)
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}
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keyPEM := pem.EncodeToMemory(
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&pem.Block{
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Type: "RSA PRIVATE KEY",
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Bytes: x509.MarshalPKCS1PrivateKey(privateKey),
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},
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)
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return string(keyPEM), nil
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}
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