implement checkMajorVersion

Author: qmuntal

dsa.go

@@ -196,9 +196,8 @@ func newDSA(params DSAParameters, X, Y BigInt) (C.GO_EVP_PKEY_PTR, error) {
 }
 
 func newDSA1(params DSAParameters, X, Y BigInt) (C.GO_EVP_PKEY_PTR, error) {
-	if vMajor != 1 {
-		panic("incorrect vMajor version")
-	}
+	checkMajorVersion(1)
+
 	dsa := C.go_openssl_DSA_new()
 	p, q, g := bigToBN(params.P), bigToBN(params.Q), bigToBN(params.G)
 	var ret C.int
@@ -247,9 +246,8 @@ func newDSA1(params DSAParameters, X, Y BigInt) (C.GO_EVP_PKEY_PTR, error) {
 }
 
 func newDSA3(params DSAParameters, X, Y BigInt) (C.GO_EVP_PKEY_PTR, error) {
-	if vMajor != 3 {
-		panic("incorrect vMajor version")
-	}
+	checkMajorVersion(3)
+
 	bld := C.go_openssl_OSSL_PARAM_BLD_new()
 	if bld == nil {
 		return nil, newOpenSSLError("OSSL_PARAM_BLD_new")

ecdh.go

@@ -127,9 +127,8 @@ func newECDHPkey(curve string, bytes []byte, isPrivate bool) (C.GO_EVP_PKEY_PTR,
 }
 
 func newECDHPkey1(nid C.int, bytes []byte, isPrivate bool) (pkey C.GO_EVP_PKEY_PTR, err error) {
-	if vMajor != 1 {
-		panic("incorrect vMajor version")
-	}
+	checkMajorVersion(1)
+
 	key := C.go_openssl_EC_KEY_new_by_curve_name(nid)
 	if key == nil {
 		return nil, newOpenSSLError("EC_KEY_new_by_curve_name")
@@ -166,9 +165,8 @@ func newECDHPkey1(nid C.int, bytes []byte, isPrivate bool) (pkey C.GO_EVP_PKEY_P
 }
 
 func newECDHPkey3(nid C.int, bytes []byte, isPrivate bool) (C.GO_EVP_PKEY_PTR, error) {
-	if vMajor != 3 {
-		panic("incorrect vMajor version")
-	}
+	checkMajorVersion(3)
+
 	bld := C.go_openssl_OSSL_PARAM_BLD_new()
 	if bld == nil {
 		return nil, newOpenSSLError("OSSL_PARAM_BLD_new")

ecdsa.go

@@ -149,9 +149,8 @@ func newECDSAKey(curve string, X, Y, D BigInt) (C.GO_EVP_PKEY_PTR, error) {
 }
 
 func newECDSAKey1(nid C.int, bx, by, bd C.GO_BIGNUM_PTR) (pkey C.GO_EVP_PKEY_PTR, err error) {
-	if vMajor != 1 {
-		panic("incorrect vMajor version")
-	}
+	checkMajorVersion(1)
+
 	key := C.go_openssl_EC_KEY_new_by_curve_name(nid)
 	if key == nil {
 		return nil, newOpenSSLError("EC_KEY_new_by_curve_name failed")
@@ -171,9 +170,8 @@ func newECDSAKey1(nid C.int, bx, by, bd C.GO_BIGNUM_PTR) (pkey C.GO_EVP_PKEY_PTR
 }
 
 func newECDSAKey3(nid C.int, bx, by, bd C.GO_BIGNUM_PTR) (C.GO_EVP_PKEY_PTR, error) {
-	if vMajor != 3 {
-		panic("incorrect vMajor version")
-	}
+	checkMajorVersion(3)
+
 	// Create the encoded public key public key from bx and by.
 	pubBytes, err := generateAndEncodeEcPublicKey(nid, func(group C.GO_EC_GROUP_PTR) (C.GO_EC_POINT_PTR, error) {
 		pt := C.go_openssl_EC_POINT_new(group)

openssl.go

@@ -77,6 +77,13 @@ func errUnsupportedVersion() error {
 	return errors.New("openssl: OpenSSL version: " + utoa(vMajor) + "." + utoa(vMinor) + "." + utoa(vPatch))
 }
 
+// checkMajorVersion panics if the current major version is not expected.
+func checkMajorVersion(expected uint) {
+	if vMajor != expected {
+		panic("openssl: incorrect major version (" + strconv.Itoa(int(expected)) + "), expected " + strconv.Itoa(int(expected)))
+	}
+}
+
 type fail string
 
 func (e fail) Error() string { return "openssl: " + string(e) + " failed" }