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package httpsig
import (
"bufio"
"bytes"
"errors"
"fmt"
"net/http"
"net/http/httptest"
"os"
"strings"
"testing"
"github.com/remitly-oss/httpsig-go/sigtest"
)
// FuzzSigningOptions fuzzes the basic user input to SigningOptions
func FuzzSigningOptions1(f *testing.F) {
testcases := [][]string{
{"", "", "", ""},
{"", "0", "0", "\xde"},
{"", "\n", "0", "0"},
{"", "", "0", "@"},
{"", "@query-param", "0", "0"},
{string(Algo_ECDSA_P256_SHA256), "@query", "0", "0"},
{"any", "@query", "0", "0"},
{string(Algo_ED25519), "@query", "0", "0"},
}
for _, tc := range testcases {
f.Add(tc[0], tc[1], tc[2], tc[3])
}
reqtxt, err := os.ReadFile("testdata/rfc-test-request.txt")
if err != nil {
f.Fatal(err)
}
f.Fuzz(func(t *testing.T, algo, label, keyID, tag string) {
t.Logf("Label: %s\n", label)
t.Logf("keyid: %s\n", keyID)
t.Logf("tag: %s\n", tag)
fields := Fields(label, keyID, tag)
fields = append(fields, SignedField{
Name: label,
Parameters: map[string]any{
keyID: tag,
},
})
privKey := sigtest.ReadTestPrivateKey(t, "test-key-ed25519.key")
so := SigningProfile{
Algorithm: Algo_ED25519,
Fields: Fields(label, keyID, tag),
Metadata: []Metadata{MetaKeyID, MetaTag},
Label: label,
}
sk := SigningKey{
Key: privKey,
MetaKeyID: keyID,
MetaTag: tag,
}
if so.validate(sk) != nil {
// Catching invalidate signing options is good.
return
}
req, err := http.ReadRequest(bufio.NewReader(bytes.NewBuffer(reqtxt)))
if err != nil {
t.Fatal(err)
}
err = Sign(req, so, sk)
if err != nil {
if _, ok := err.(*SignatureError); ok {
// Handled error
return
}
// Unhandled error
t.Error(err)
}
})
}
func FuzzSigningOptionsFields(f *testing.F) {
testcases := [][]string{
{"", "", ""},
{"0", "0", "\xde"},
{"\n", "0", "0"},
{"", "0", "@"},
{"@query-param", "name", "0"},
{"@query", "0", "0"},
{"@method", "", ""},
{"@status", "", ""},
}
for _, tc := range testcases {
f.Add(tc[0], tc[1], tc[2])
}
reqtxt, err := os.ReadFile("testdata/rfc-test-request.txt")
if err != nil {
f.Fatal(err)
}
f.Fuzz(func(t *testing.T, field, tagName, tagValue string) {
t.Logf("field: %s\n", field)
t.Logf("tag: %s:%s\n", tagName, tagValue)
fields := []SignedField{}
if tagName == "" {
fields = append(fields, SignedField{
Name: field,
})
} else {
fields = append(fields, SignedField{
Name: field,
Parameters: map[string]any{
tagName: tagValue,
},
})
}
so := SigningProfile{
Algorithm: Algo_ED25519,
Fields: fields,
}
sk := SigningKey{
Key: sigtest.ReadTestPrivateKey(t, "test-key-ed25519.key"),
}
if so.validate(sk) != nil {
// Catching invalidate signing options is good.
return
}
req, err := http.ReadRequest(bufio.NewReader(bytes.NewBuffer(reqtxt)))
if err != nil {
t.Fatal(err)
}
err = Sign(req, so, sk)
if err != nil {
if _, ok := err.(*SignatureError); ok {
// Handled error
return
}
// Unhandled error
t.Error(err)
}
})
}
func FuzzExtractSignatures(f *testing.F) {
testcases := []struct {
SignatureHeader string
SignatureInputHeader string
}{
{
SignatureHeader: "",
SignatureInputHeader: "",
},
{
SignatureHeader: "sig-b24=(\"@status\" \"content-type\" \"content-digest\" \"content-length\");created=1618884473;keyid=\"test-key-ecc-p256\"",
SignatureInputHeader: "sig-b24=:wNmSUAhwb5LxtOtOpNa6W5xj067m5hFrj0XQ4fvpaCLx0NKocgPquLgyahnzDnDAUy5eCdlYUEkLIj+32oiasw==:",
},
{"sig1=:dGVzdA==:", "sig1=(\"@method\", \"@target-uri\");created=1618884473"},
{"sig1=:invalid-base64:", "sig1=(\"@method\");created=1618884473"},
{"sig1", "sig1=()"},
{"sig1=:dGVzdA==:, sig2=:dGVzdA==:", "sig1=(\"@method\"), sig2=(\"@path\")"},
{"sig1=invalid", "sig1=(\"@method\")"},
{"sig1=:dGVzdA==:", "sig1=invalid"},
{"=:dGVzdA==:", "=(\"@method\")"},
{"sig1=:dGVzdA==:", "sig1=("},
{
SignatureInputHeader: `tst-ecdsa-0=("content-digest" "@method" "@target-uri");created=1755899955;keyid="test-key-ecdsa", tst-ecdsa-1=("content-digest" "@method" "@target-uri");created=1755899955;keyid="test-key-ecdsa", tst-ecdsa-2=("content-digest" "@method" "@target-uri");created=1755899955;keyid="test-key-ecdsa", tst-ecdsa-3=("content-digest" "@method" "@target-uri");created=1755899955;keyid="test-key-ecdsa", tst-ecdsa-4=("content-digest" "@method" "@target-uri");created=1755899955;keyid="test-key-ecdsa", tst-ecdsa-5=("content-digest" "@method" "@target-uri");created=1755899955;keyid="test-key-ecdsa", tst-ecdsa-6=("content-digest" "@method" "@target-uri");created=1755899955;keyid="test-key-ecdsa", tst-ecdsa-7=("content-digest" "@method" "@target-uri");created=1755899955;keyid="test-key-ecdsa"`,
SignatureHeader: `tst-ecdsa-0=:ktNUTq0MYt1iIDU8AxBi39Nrw6vVLAD7BL1EMuHxtmpDatYx7CFxxFee1cPqE3hkOKknGnQgS6Umrv0ct3wq3A==:, tst-ecdsa-1=:XFoz0EbrdxZFhsvVi0xhRBI2F5NNaQ5SsdRUjmyBiaTqZvC7Ud15gD+AmTipZxyjx5iX9YNKDNAnILv0fViWHA==:, tst-ecdsa-2=:EmUtrfTosRFr1uIKCu89ggqpfUClw4La3C3esWuXYdcg7xntY5dpqoqFCwyrlwxHveLcBxoHcVp1trSGsUJGAA==:, tst-ecdsa-3=:jJw65CIeODTbYxTAqBPof9U70FU1+uL/k8GLLJR3YMOHbk5enJqi9GCI6Gpn7SUamw1d3u6YqUb9BYo2C1WdTA==:, tst-ecdsa-4=:yhFGqoxuKpzApUccnjspLYhneYXf9Y/CTNbrCrQuzRUf6OzDGJFxJB1deDwdLJzIGB2DnICNVtHc3Zp/MI5+jQ==:, tst-ecdsa-5=:jxZ+G1ZFY9yc0GyhTXG5vSKtHTEQ2Slacb6AJzV8lHuuoTJpn08eZeJijLXhiRzBNzHEoFc9PwcsKehIp5dGjA==:, tst-ecdsa-6=:HLFRyXXkrIZbRYEoVQl3aL1EpFtg52JkAK8wad+wHnehVFYzO3M7tyEpdGBcr/6ZpUr1rkc1J1Ru9wRa3WkqRQ==:, tst-ecdsa-7=:b7+mkQt02cvV/cucQcSn9J+lJ9/cRkWcVX8mAdNh+p3avD1ULj/hg0z7ZkgEnlfDuWaTskdu+CLncxseLsEIWQ==:`,
},
}
for _, tc := range testcases {
f.Add(tc.SignatureHeader, tc.SignatureInputHeader)
}
reqtxt, err := os.ReadFile("testdata/rfc-test-request.txt")
if err != nil {
f.Fatal(err)
}
f.Fuzz(func(t *testing.T, sigHeader, sigInputHeader string) {
t.Logf("signature header: %s\n", sigHeader)
t.Logf("signature input header: %s\n", sigInputHeader)
req, err := http.ReadRequest(bufio.NewReader(bytes.NewBuffer(reqtxt)))
if err != nil {
t.Fatal(err)
}
req.Header.Set("signature", sigHeader)
req.Header.Set("signature-input", sigInputHeader)
sigSFV, err := parseSignaturesFromRequest(req.Header, false)
if err != nil {
return
}
for _, label := range sigSFV.Sigs.Names() {
_, err = unmarshalSignature(sigSFV, label)
if err != nil {
if _, ok := err.(*SignatureError); ok {
// Handled error
return
}
// Unhandled error
t.Error(err)
}
}
})
}
// FuzzComponentIDParsing tests component identifier parsing edge cases
func FuzzComponentIDParsing(f *testing.F) {
testcases := []struct {
name string
parameters map[string]string
}{
{"@method", nil},
{"@target-uri", nil},
{"@query-param", map[string]string{"name": "test"}},
{"content-digest", nil},
{"", nil},
{"@invalid-component", nil},
{"header-with-unicode-😀", nil},
{"@query-param", map[string]string{"name": ""}},
{"@query-param", map[string]string{"": "value"}},
}
for _, tc := range testcases {
params := ""
for k, v := range tc.parameters {
params += fmt.Sprintf(";%s=%s", k, v)
}
f.Add(tc.name, params)
}
f.Fuzz(func(t *testing.T, name, paramStr string) {
// Create a SignedField with fuzzed input
field := SignedField{Name: name}
// Parse parameters string into map
if paramStr != "" {
field.Parameters = make(map[string]any)
pairs := strings.Split(paramStr, ";")
for _, pair := range pairs {
if kv := strings.SplitN(pair, "=", 2); len(kv) == 2 {
field.Parameters[kv[0]] = kv[1]
}
}
}
// Convert to componentID - should not panic
cID := field.componentID()
// Try to get signature name and value
_, err := cID.signatureName()
if err != nil {
var sigErr *SignatureError
if !errors.As(err, &sigErr) {
t.Errorf("Expected SignatureError, got: %T", err)
}
}
req := httptest.NewRequest("GET",
"http://example.com/test?param=value", nil)
req.Header.Set("Content-Digest",
"sha-256=:X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=:")
msg := httpMessage{Req: req}
_, err = cID.signatureValue(msg)
if err != nil {
var sigErr *SignatureError
if !errors.As(err, &sigErr) {
t.Errorf("Expected SignatureError, got: %T", err)
}
}
})
}