lewis.moe
forked from
tangled.org/core
Monorepo for Tangled
appview: commitverify: move commit verification code to new package
Signed-off-by: Anirudh Oppiliappan <anirudh@tangled.sh>
authored by
Tangled
c3c81fda
86dbd23a
+119
appview/commitverify/verify.go
+119
appview/commitverify/verify.go
···
···
1
+
package commitverify
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+
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+
import (
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+
"fmt"
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+
"log"
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+
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"github.com/go-git/go-git/v5/plumbing/object"
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"tangled.sh/tangled.sh/core/appview/db"
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"tangled.sh/tangled.sh/core/crypto"
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"tangled.sh/tangled.sh/core/types"
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)
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+
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type verifiedCommit struct {
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fingerprint string
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hash string
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}
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type VerifiedCommits map[verifiedCommit]struct{}
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func (vcs VerifiedCommits) IsVerified(hash string) bool {
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for vc := range vcs {
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if vc.hash == hash {
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return true
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}
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}
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return false
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}
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+
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func (vcs VerifiedCommits) Fingerprint(hash string) string {
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for vc := range vcs {
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if vc.hash == hash {
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return vc.fingerprint
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}
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}
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return ""
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}
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func GetVerifiedObjectCommits(e db.Execer, emailToDid map[string]string, commits []*object.Commit) (VerifiedCommits, error) {
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ndCommits := []types.NiceDiff{}
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for _, commit := range commits {
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ndCommits = append(ndCommits, ObjectCommitToNiceDiff(commit))
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}
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return GetVerifiedCommits(e, emailToDid, ndCommits)
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}
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func GetVerifiedCommits(e db.Execer, emailToDid map[string]string, ndCommits []types.NiceDiff) (VerifiedCommits, error) {
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vcs := VerifiedCommits{}
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didPubkeyCache := make(map[string][]db.PublicKey)
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for _, commit := range ndCommits {
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c := commit.Commit
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committerEmail := c.Committer.Email
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if did, exists := emailToDid[committerEmail]; exists {
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// check if we've already fetched public keys for this did
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pubKeys, ok := didPubkeyCache[did]
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if !ok {
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// fetch and cache public keys
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keys, err := db.GetPublicKeysForDid(e, did)
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if err != nil {
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log.Printf("failed to fetch pubkey for %s: %v", committerEmail, err)
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continue
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}
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pubKeys = keys
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didPubkeyCache[did] = pubKeys
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}
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+
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// try to verify with any associated pubkeys
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for _, pk := range pubKeys {
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if _, ok := crypto.VerifyCommitSignature(pk.Key, commit); ok {
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fp, err := crypto.SSHFingerprint(pk.Key)
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if err != nil {
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log.Println("error computing ssh fingerprint:", err)
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}
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fmt.Println(fp)
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vc := verifiedCommit{fingerprint: fp, hash: c.This}
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vcs[vc] = struct{}{}
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break
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}
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}
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}
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}
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return vcs, nil
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}
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// ObjectCommitToNiceDiff is a compatibility function to convert a
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// commit object into a NiceDiff structure.
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func ObjectCommitToNiceDiff(c *object.Commit) types.NiceDiff {
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var niceDiff types.NiceDiff
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// set commit information
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niceDiff.Commit.Message = c.Message
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niceDiff.Commit.Author = c.Author
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niceDiff.Commit.This = c.Hash.String()
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niceDiff.Commit.Committer = c.Committer
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niceDiff.Commit.Tree = c.TreeHash.String()
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niceDiff.Commit.PGPSignature = c.PGPSignature
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changeId, ok := c.ExtraHeaders["change-id"]
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if ok {
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niceDiff.Commit.ChangedId = string(changeId)
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+
}
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+
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// set parent hash if available
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if len(c.ParentHashes) > 0 {
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niceDiff.Commit.Parent = c.ParentHashes[0].String()
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+
}
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+
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// XXX: Stats and Diff fields are typically populated
115
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// after fetching the actual diff information, which isn't
116
+
// directly available in the commit object itself.
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118
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return niceDiff
119
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}
-52
appview/repo/repo_util.go
-52
appview/repo/repo_util.go
···
4
"context"
5
"crypto/rand"
6
"fmt"
7
-
"log"
8
"math/big"
9
10
"github.com/go-git/go-git/v5/plumbing/object"
11
-
"tangled.sh/tangled.sh/core/appview/db"
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-
"tangled.sh/tangled.sh/core/crypto"
13
-
"tangled.sh/tangled.sh/core/types"
14
)
15
16
func uniqueEmails(commits []*object.Commit) []string {
···
89
}
90
91
return emailToDidOrHandle
92
-
}
93
-
94
-
func verifiedObjectCommits(r *Repo, emailToDid map[string]string, commits []*object.Commit) (map[string]bool, error) {
95
-
ndCommits := []types.NiceDiff{}
96
-
for _, commit := range commits {
97
-
ndCommits = append(ndCommits, types.ObjectCommitToNiceDiff(commit))
98
-
}
99
-
return verifiedCommits(r, emailToDid, ndCommits)
100
-
}
101
-
102
-
func verifiedCommits(r *Repo, emailToDid map[string]string, ndCommits []types.NiceDiff) (map[string]bool, error) {
103
-
hashToVerified := make(map[string]bool)
104
-
105
-
didPubkeyCache := make(map[string][]db.PublicKey)
106
-
107
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for _, commit := range ndCommits {
108
-
c := commit.Commit
109
-
110
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committerEmail := c.Committer.Email
111
-
if did, exists := emailToDid[committerEmail]; exists {
112
-
// check if we've already fetched public keys for this did
113
-
pubKeys, ok := didPubkeyCache[did]
114
-
if !ok {
115
-
// fetch and cache public keys
116
-
keys, err := db.GetPublicKeysForDid(r.db, did)
117
-
if err != nil {
118
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log.Printf("failed to fetch pubkey for %s: %v", committerEmail, err)
119
-
continue
120
-
}
121
-
pubKeys = keys
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-
didPubkeyCache[did] = pubKeys
123
-
}
124
-
125
-
verified := false
126
-
127
-
// try to verify with any associated pubkeys
128
-
for _, pk := range pubKeys {
129
-
if _, ok := crypto.VerifyCommitSignature(pk.Key, commit); ok {
130
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verified = true
131
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break
132
-
}
133
-
}
134
-
135
-
hashToVerified[c.This] = verified
136
-
}
137
-
}
138
-
139
-
return hashToVerified, nil
140
}
141
142
func randomString(n int) string {
-30
types/diff.go
-30
types/diff.go
···
77
78
return files
79
}
80
-
81
-
// ObjectCommitToNiceDiff is a compatibility function to convert a
82
-
// commit object into a NiceDiff structure.
83
-
func ObjectCommitToNiceDiff(c *object.Commit) NiceDiff {
84
-
var niceDiff NiceDiff
85
-
86
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// set commit information
87
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niceDiff.Commit.Message = c.Message
88
-
niceDiff.Commit.Author = c.Author
89
-
niceDiff.Commit.This = c.Hash.String()
90
-
niceDiff.Commit.Committer = c.Committer
91
-
niceDiff.Commit.Tree = c.TreeHash.String()
92
-
niceDiff.Commit.PGPSignature = c.PGPSignature
93
-
94
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changeId, ok := c.ExtraHeaders["change-id"]
95
-
if ok {
96
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niceDiff.Commit.ChangedId = string(changeId)
97
-
}
98
-
99
-
// set parent hash if available
100
-
if len(c.ParentHashes) > 0 {
101
-
niceDiff.Commit.Parent = c.ParentHashes[0].String()
102
-
}
103
-
104
-
// XXX: Stats and Diff fields are typically populated
105
-
// after fetching the actual diff information, which isn't
106
-
// directly available in the commit object itself.
107
-
108
-
return niceDiff
109
-
}