func (key *pKey) SignPKCS1v15(method Method, data []byte) ([]byte, error) {
var ctx C.EVP_MD_CTX
C.EVP_MD_CTX_init(&ctx)
defer C.EVP_MD_CTX_cleanup(&ctx)
if 1 != C.EVP_SignInit_not_a_macro(&ctx, method) {
return nil, errors.New("signpkcs1v15: failed to init signature")
}
if len(data) > 0 {
if 1 != C.EVP_SignUpdate_not_a_macro(
&ctx, unsafe.Pointer(&data[0]), C.uint(len(data))) {
return nil, errors.New("signpkcs1v15: failed to update signature")
}
}
sig := make([]byte, C.EVP_PKEY_size(key.key))
var sigblen C.uint
if 1 != C.EVP_SignFinal(&ctx,
((*C.uchar)(unsafe.Pointer(&sig[0]))), &sigblen, key.key) {
return nil, errors.New("signpkcs1v15: failed to finalize signature")
}
return sig[:sigblen], nil
}
func (key *pKey) SignPKCS1v15(data []byte) ([]byte, error) {
//
// Initialize the context using sha1 as method, as we
// need to generate RSA-SHA1 signature
//
var ctx C.EVP_MD_CTX
C.EVP_MD_CTX_init(&ctx)
defer C.EVP_MD_CTX_cleanup(&ctx)
if 1 != C.EVP_SignInit_not_a_macro(&ctx, C.EVP_sha1()) {
return nil, errors.New("rsasha1signature: failed to init signature")
}
if len(data) > 0 {
if 1 != C.EVP_SignUpdate_not_a_macro(
&ctx, unsafe.Pointer(&data[0]), C.uint(len(data))) {
return nil, errors.New("rsasha1signature: failed to update signature")
}
}
//
// Sign
//
sig := make([]byte, C.EVP_PKEY_size(key.key))
var sigblen C.uint
// prevent data race when multiple threads are spawned
// by the go runtime, mostly because you are performing the signing
// inside a concurrent http request.
sslMutex.Lock()
defer sslMutex.Unlock()
if 1 != C.EVP_SignFinal(&ctx,
((*C.uchar)(unsafe.Pointer(&sig[0]))), &sigblen, key.key) {
return nil, errors.New("rsasha1signature: failed to finalize signature")
}
return sig[:sigblen], nil
}