mirror of
https://github.com/libp2p/go-openssl.git
synced 2024-12-27 23:40:18 +08:00
294 lines
7.8 KiB
Go
294 lines
7.8 KiB
Go
// Copyright (C) 2014 Space Monkey, Inc.
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// +build cgo
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package openssl
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// #include <openssl/evp.h>
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// #include <openssl/ssl.h>
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// #include <openssl/conf.h>
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//
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// void OPENSSL_free_not_a_macro(void *ref) { OPENSSL_free(ref); }
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//
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// int EVP_SignInit_not_a_macro(EVP_MD_CTX *ctx, const EVP_MD *type) {
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// return EVP_SignInit(ctx, type);
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// }
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//
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// int EVP_SignUpdate_not_a_macro(EVP_MD_CTX *ctx, const void *d,
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// unsigned int cnt) {
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// return EVP_SignUpdate(ctx, d, cnt);
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// }
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//
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// int EVP_VerifyInit_not_a_macro(EVP_MD_CTX *ctx, const EVP_MD *type) {
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// return EVP_VerifyInit(ctx, type);
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// }
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//
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// int EVP_VerifyUpdate_not_a_macro(EVP_MD_CTX *ctx, const void *d,
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// unsigned int cnt) {
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// return EVP_VerifyUpdate(ctx, d, cnt);
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// }
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import "C"
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import (
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"errors"
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"io/ioutil"
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"runtime"
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"unsafe"
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)
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type Method *C.EVP_MD
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var (
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SHA256 Method = C.EVP_sha256()
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)
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type PublicKey interface {
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// Verifies the data signature using PKCS1.15
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VerifyPKCS1v15(method Method, data, sig []byte) error
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// MarshalPKIXPublicKeyPEM converts the public key to PEM-encoded PKIX
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// format
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MarshalPKIXPublicKeyPEM() (pem_block []byte, err error)
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// MarshalPKIXPublicKeyDER converts the public key to DER-encoded PKIX
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// format
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MarshalPKIXPublicKeyDER() (der_block []byte, err error)
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evpPKey() *C.EVP_PKEY
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}
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type PrivateKey interface {
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PublicKey
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// Signs the data using PKCS1.15
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SignPKCS1v15(Method, []byte) ([]byte, error)
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// MarshalPKCS1PrivateKeyPEM converts the private key to PEM-encoded PKCS1
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// format
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MarshalPKCS1PrivateKeyPEM() (pem_block []byte, err error)
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// MarshalPKCS1PrivateKeyDER converts the private key to DER-encoded PKCS1
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// format
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MarshalPKCS1PrivateKeyDER() (der_block []byte, err error)
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}
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type pKey struct {
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key *C.EVP_PKEY
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}
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func (key *pKey) evpPKey() *C.EVP_PKEY { return key.key }
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func (key *pKey) SignPKCS1v15(method Method, data []byte) ([]byte, error) {
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var ctx C.EVP_MD_CTX
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C.EVP_MD_CTX_init(&ctx)
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defer C.EVP_MD_CTX_cleanup(&ctx)
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if 1 != C.EVP_SignInit_not_a_macro(&ctx, method) {
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return nil, errors.New("signpkcs1v15: failed to init signature")
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}
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if len(data) > 0 {
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if 1 != C.EVP_SignUpdate_not_a_macro(
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&ctx, unsafe.Pointer(&data[0]), C.uint(len(data))) {
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return nil, errors.New("signpkcs1v15: failed to update signature")
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}
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}
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sig := make([]byte, C.EVP_PKEY_size(key.key))
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var sigblen C.uint
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if 1 != C.EVP_SignFinal(&ctx,
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((*C.uchar)(unsafe.Pointer(&sig[0]))), &sigblen, key.key) {
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return nil, errors.New("signpkcs1v15: failed to finalize signature")
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}
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return sig[:sigblen], nil
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}
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func (key *pKey) VerifyPKCS1v15(method Method, data, sig []byte) error {
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var ctx C.EVP_MD_CTX
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C.EVP_MD_CTX_init(&ctx)
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defer C.EVP_MD_CTX_cleanup(&ctx)
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if 1 != C.EVP_VerifyInit_not_a_macro(&ctx, method) {
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return errors.New("verifypkcs1v15: failed to init verify")
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}
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if len(data) > 0 {
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if 1 != C.EVP_VerifyUpdate_not_a_macro(
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&ctx, unsafe.Pointer(&data[0]), C.uint(len(data))) {
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return errors.New("verifypkcs1v15: failed to update verify")
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}
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}
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if 1 != C.EVP_VerifyFinal(&ctx,
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((*C.uchar)(unsafe.Pointer(&sig[0]))), C.uint(len(sig)), key.key) {
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return errors.New("verifypkcs1v15: failed to finalize verify")
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}
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return nil
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}
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func (key *pKey) MarshalPKCS1PrivateKeyPEM() (pem_block []byte,
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err error) {
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bio := C.BIO_new(C.BIO_s_mem())
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if bio == nil {
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return nil, errors.New("failed to allocate memory BIO")
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}
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defer C.BIO_free(bio)
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rsa := (*C.RSA)(C.EVP_PKEY_get1_RSA(key.key))
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if rsa == nil {
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return nil, errors.New("failed getting rsa key")
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}
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defer C.RSA_free(rsa)
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if int(C.PEM_write_bio_RSAPrivateKey(bio, rsa, nil, nil, C.int(0), nil,
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nil)) != 1 {
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return nil, errors.New("failed dumping private key")
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}
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return ioutil.ReadAll(asAnyBio(bio))
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}
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func (key *pKey) MarshalPKCS1PrivateKeyDER() (der_block []byte,
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err error) {
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bio := C.BIO_new(C.BIO_s_mem())
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if bio == nil {
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return nil, errors.New("failed to allocate memory BIO")
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}
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defer C.BIO_free(bio)
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rsa := (*C.RSA)(C.EVP_PKEY_get1_RSA(key.key))
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if rsa == nil {
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return nil, errors.New("failed getting rsa key")
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}
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defer C.RSA_free(rsa)
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if int(C.i2d_RSAPrivateKey_bio(bio, rsa)) != 1 {
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return nil, errors.New("failed dumping private key der")
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}
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return ioutil.ReadAll(asAnyBio(bio))
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}
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func (key *pKey) MarshalPKIXPublicKeyPEM() (pem_block []byte,
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err error) {
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bio := C.BIO_new(C.BIO_s_mem())
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if bio == nil {
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return nil, errors.New("failed to allocate memory BIO")
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}
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defer C.BIO_free(bio)
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rsa := (*C.RSA)(C.EVP_PKEY_get1_RSA(key.key))
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if rsa == nil {
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return nil, errors.New("failed getting rsa key")
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}
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defer C.RSA_free(rsa)
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if int(C.PEM_write_bio_RSA_PUBKEY(bio, rsa)) != 1 {
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return nil, errors.New("failed dumping public key pem")
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}
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return ioutil.ReadAll(asAnyBio(bio))
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}
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func (key *pKey) MarshalPKIXPublicKeyDER() (der_block []byte,
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err error) {
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bio := C.BIO_new(C.BIO_s_mem())
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if bio == nil {
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return nil, errors.New("failed to allocate memory BIO")
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}
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defer C.BIO_free(bio)
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rsa := (*C.RSA)(C.EVP_PKEY_get1_RSA(key.key))
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if rsa == nil {
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return nil, errors.New("failed getting rsa key")
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}
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defer C.RSA_free(rsa)
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if int(C.i2d_RSA_PUBKEY_bio(bio, rsa)) != 1 {
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return nil, errors.New("failed dumping public key der")
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}
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return ioutil.ReadAll(asAnyBio(bio))
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}
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// LoadPrivateKey loads a private key from a PEM-encoded block.
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func LoadPrivateKey(pem_block []byte) (PrivateKey, error) {
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if len(pem_block) == 0 {
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return nil, errors.New("empty pem block")
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}
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bio := C.BIO_new_mem_buf(unsafe.Pointer(&pem_block[0]),
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C.int(len(pem_block)))
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if bio == nil {
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return nil, errors.New("failed creating bio")
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}
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defer C.BIO_free(bio)
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rsakey := C.PEM_read_bio_RSAPrivateKey(bio, nil, nil, nil)
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if rsakey == nil {
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return nil, errors.New("failed reading rsa key")
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}
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defer C.RSA_free(rsakey)
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// convert to PKEY
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key := C.EVP_PKEY_new()
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if key == nil {
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return nil, errors.New("failed converting to evp_pkey")
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}
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if C.EVP_PKEY_set1_RSA(key, (*C.struct_rsa_st)(rsakey)) != 1 {
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C.EVP_PKEY_free(key)
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return nil, errors.New("failed converting to evp_pkey")
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}
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p := &pKey{key: key}
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runtime.SetFinalizer(p, func(p *pKey) {
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C.EVP_PKEY_free(p.key)
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})
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return p, nil
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}
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type Certificate struct {
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x *C.X509
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ref interface{}
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}
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// LoadCertificate loads an X509 certificate from a PEM-encoded block.
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func LoadCertificate(pem_block []byte) (*Certificate, error) {
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if len(pem_block) == 0 {
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return nil, errors.New("empty pem block")
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}
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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bio := C.BIO_new_mem_buf(unsafe.Pointer(&pem_block[0]),
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C.int(len(pem_block)))
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cert := C.PEM_read_bio_X509(bio, nil, nil, nil)
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C.BIO_free(bio)
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if cert == nil {
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return nil, errorFromErrorQueue()
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}
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x := &Certificate{x: cert}
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runtime.SetFinalizer(x, func(x *Certificate) {
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C.X509_free(x.x)
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})
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return x, nil
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}
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// MarshalPEM converts the X509 certificate to PEM-encoded format
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func (c *Certificate) MarshalPEM() (pem_block []byte, err error) {
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bio := C.BIO_new(C.BIO_s_mem())
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if bio == nil {
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return nil, errors.New("failed to allocate memory BIO")
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}
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defer C.BIO_free(bio)
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if int(C.PEM_write_bio_X509(bio, c.x)) != 1 {
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return nil, errors.New("failed dumping certificate")
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}
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return ioutil.ReadAll(asAnyBio(bio))
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}
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// PublicKey returns the public key embedded in the X509 certificate.
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func (c *Certificate) PublicKey() (PublicKey, error) {
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pkey := C.X509_get_pubkey(c.x)
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if pkey == nil {
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return nil, errors.New("no public key found")
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}
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key := &pKey{key: pkey}
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runtime.SetFinalizer(key, func(key *pKey) {
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C.EVP_PKEY_free(key.key)
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})
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return key, nil
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}
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// GetSerialNumberHex returns the certificate's serial number in hex format
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func (c *Certificate) GetSerialNumberHex() (serial string) {
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asn1_i := C.X509_get_serialNumber(c.x)
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bignum := C.ASN1_INTEGER_to_BN(asn1_i, nil)
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hex := C.BN_bn2hex(bignum)
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serial = C.GoString(hex)
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C.BN_free(bignum)
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C.OPENSSL_free_not_a_macro(unsafe.Pointer(hex))
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return
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}
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