mirror of
https://github.com/google/go-attestation.git
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89884d0a74
* Fix Intel EK certificate URL To download the certificate for an Intel TPM, the base64 padding in the URL needs to be replaced with `%3D`. If it's not replaced, requesting the URL will result in HTTP 403 Forbidden. * Use `url.QueryEscape` to escape base64 padding
59 lines
1.8 KiB
Go
59 lines
1.8 KiB
Go
package attest
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import (
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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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"testing"
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)
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// Created by downloading the base64-url encoded PEM data from
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// https://ekop.intel.com/ekcertservice/WVEG2rRwkQ7m3RpXlUphgo6Y2HLxl18h6ZZkkOAdnBE%3D,
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// extracting its public key, and formatting it to PEM using
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//
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// openssl x509 -in ekcert.pem -pubkey
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//
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// This is the public key from the EK cert that's used for testing tpm2-tools:
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// https://github.com/tpm2-software/tpm2-tools/blob/master/test/integration/tests/getekcertificate.sh
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var testRSAKey = mustParseRSAKey(`-----BEGIN PUBLIC KEY-----
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MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwyDi8kSoYBqs8+AdJsZl
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JJk1Vi3h2hl+nn8HbEaWE8+2U+mOwsOG/B0TPyyMbMM4tzLwsgi9g4qHej5bvD4d
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QIToNcfIkGocBbTS0w/b68HbrZUPprFlvUtqhkYDFGFkwMT1nUiQEe8fko3upukA
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YfPTdeVkYnMVHvYiJSCYvhpKsB3AoSInxgn9rOsRWvQI1Gk6b0mRl3RpWwwSvBih
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/3EgpzN7L7XxlR2Lt/CU1bVUwRyVI7MHKf5keH0KE7nmMEiNq039hmNKUnDscvzF
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pE3GeajzKTjdgZfina6Dn1tMoPXeJ8lSLCPFThws5XhZUlEYvURwsYGA7veK5CZ7
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zQIDAQAB
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-----END PUBLIC KEY-----`)
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func mustParseRSAKey(data string) *rsa.PublicKey {
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pub, err := parseRSAKey(data)
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if err != nil {
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panic(err)
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}
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return pub
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}
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func parseRSAKey(data string) (*rsa.PublicKey, error) {
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b, _ := pem.Decode([]byte(data))
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if b == nil {
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return nil, fmt.Errorf("failed to parse PEM key")
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}
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pub, err := x509.ParsePKIXPublicKey(b.Bytes)
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if err != nil {
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return nil, fmt.Errorf("parsing public key: %v", err)
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}
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if rsaPub, ok := pub.(*rsa.PublicKey); ok {
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return rsaPub, nil
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}
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return nil, fmt.Errorf("expected *rsa.PublicKey, got %T", pub)
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}
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func TestIntelEKURL(t *testing.T) {
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want := "https://ekop.intel.com/ekcertservice/WVEG2rRwkQ7m3RpXlUphgo6Y2HLxl18h6ZZkkOAdnBE%3D"
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got := intelEKURL(testRSAKey)
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if got != want {
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t.Fatalf("intelEKURL(), got=%q, want=%q", got, want)
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}
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}
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