refactor: update crypto/ledger to btcec/v2

[julienrbrt]

Description

ref: #13513 (comment)
kindly pinging @elias-orijtech

cd crypto/ledger
go test ./... -tags='ledger,test_ledger_mock'
ok      github.com/cosmos/cosmos-sdk/crypto/ledger      0.118s

---

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[elias-orijtech]

Perhaps @odeke-em would like to take a quick look as well.

[ftheirs]

LGTM! 👍

[sonarqubecloud]

[Cosmos SDK] Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

93.8% Coverage
0.0% Duplication

[odeke-em]

Thank you for this change @julienrbrt, and thank you for the co-review and tag @elias-orijtech! I've added some suggestions, please take a look @julienrbrt and then I'll approve

[odeke-em]

Might seem paranoid, but I suggest that we add a length minimum check here

// Validating that we have a somewhat proper DER signature.
if n := len(sigDER); n < 4 {
    return nil, fmt.Errorf("invalid DER length: want >=4 got %d", n)
}
if g, w := sigDER[0], 0x30; g != w {
    return nil, fmt.Errorf("invalid DER: byte[0]=%x, want=%x", g, w)
}
if wantLen, gotLen := int(sigDER[1]), len(sigDER[3:]); gotLen != wantLen {
    return nil, fmt.Errorf("invalid DER len: got=%d, want=%d",
       gotLen, wantLen)
}

// Eliminate compiler Bounds checking.
_ = sigDER[9:]

[julienrbrt]

Seems a bit paranoid indeed, given that Serialize always returns this format.
https://go.dev/play/p/WuZKekW5s9x

[odeke-em]

Cool no biggie.

[tac0turtle]

utACK

[sonarqubecloud]

[Cosmos SDK - SimApp] Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information