diff options
Diffstat (limited to 'internal/stupidgcm/stupidgcm.go')
| -rw-r--r-- | internal/stupidgcm/stupidgcm.go | 46 |
1 files changed, 15 insertions, 31 deletions
diff --git a/internal/stupidgcm/stupidgcm.go b/internal/stupidgcm/stupidgcm.go index 8bc956b..0f4e25d 100644 --- a/internal/stupidgcm/stupidgcm.go +++ b/internal/stupidgcm/stupidgcm.go @@ -3,7 +3,6 @@ package stupidgcm // #include <openssl/evp.h> -// #include <openssl/err.h> // #cgo pkg-config: libcrypto import "C" @@ -19,21 +18,6 @@ const ( tagLen = 16 ) -func opensslPanic(msg string) { - for { - e := C.ERR_get_error() - if e == 0 { - break - } - log.Printf("openssl error: %d:%s:%s:%s", e, - C.GoString(C.ERR_lib_error_string(e)), - C.GoString(C.ERR_func_error_string(e)), - C.GoString(C.ERR_reason_error_string(e))) - } - log.Printf("(no further openssl error messages)") - log.Panic(msg) -} - // stupidGCM implements the cipher.AEAD interface type stupidGCM struct { key []byte @@ -69,28 +53,28 @@ func (g stupidGCM) Seal(dst, iv, in, authData []byte) []byte { // Create scratch space "context" ctx := C.EVP_CIPHER_CTX_new() if ctx == nil { - opensslPanic("EVP_CIPHER_CTX_new failed") + panic("EVP_CIPHER_CTX_new failed") } // Set cipher to AES-256 if C.EVP_EncryptInit_ex(ctx, C.EVP_aes_256_gcm(), nil, nil, nil) != 1 { - opensslPanic("EVP_EncryptInit_ex I failed") + panic("EVP_EncryptInit_ex I failed") } // Use 16-byte IV if C.EVP_CIPHER_CTX_ctrl(ctx, C.EVP_CTRL_GCM_SET_IVLEN, ivLen, nil) != 1 { - opensslPanic("EVP_CIPHER_CTX_ctrl EVP_CTRL_GCM_SET_IVLEN failed") + panic("EVP_CIPHER_CTX_ctrl EVP_CTRL_GCM_SET_IVLEN failed") } // Set key and IV if C.EVP_EncryptInit_ex(ctx, nil, nil, (*C.uchar)(&g.key[0]), (*C.uchar)(&iv[0])) != 1 { - opensslPanic("EVP_EncryptInit_ex II failed") + panic("EVP_EncryptInit_ex II failed") } // Provide authentication data var resultLen C.int if C.EVP_EncryptUpdate(ctx, nil, &resultLen, (*C.uchar)(&authData[0]), C.int(len(authData))) != 1 { - opensslPanic("EVP_EncryptUpdate authData failed") + panic("EVP_EncryptUpdate authData failed") } if int(resultLen) != len(authData) { log.Panicf("Unexpected length %d", resultLen) @@ -98,7 +82,7 @@ func (g stupidGCM) Seal(dst, iv, in, authData []byte) []byte { // Encrypt "in" into "buf" if C.EVP_EncryptUpdate(ctx, (*C.uchar)(&buf[0]), &resultLen, (*C.uchar)(&in[0]), C.int(len(in))) != 1 { - opensslPanic("EVP_EncryptUpdate failed") + panic("EVP_EncryptUpdate failed") } if int(resultLen) != len(in) { log.Panicf("Unexpected length %d", resultLen) @@ -108,7 +92,7 @@ func (g stupidGCM) Seal(dst, iv, in, authData []byte) []byte { // Because GCM is a stream encryption, this will not write out any data. dummy := make([]byte, 16) if C.EVP_EncryptFinal_ex(ctx, (*C.uchar)(&dummy[0]), &resultLen) != 1 { - opensslPanic("EVP_EncryptFinal_ex failed") + panic("EVP_EncryptFinal_ex failed") } if resultLen != 0 { log.Panicf("Unexpected length %d", resultLen) @@ -116,7 +100,7 @@ func (g stupidGCM) Seal(dst, iv, in, authData []byte) []byte { // Get GMAC tag and append it to the ciphertext in "buf" if C.EVP_CIPHER_CTX_ctrl(ctx, C.EVP_CTRL_GCM_GET_TAG, tagLen, (unsafe.Pointer)(&buf[len(in)])) != 1 { - opensslPanic("EVP_CIPHER_CTX_ctrl EVP_CTRL_GCM_GET_TAG failed") + panic("EVP_CIPHER_CTX_ctrl EVP_CTRL_GCM_GET_TAG failed") } // Free scratch space @@ -142,33 +126,33 @@ func (g stupidGCM) Open(dst, iv, in, authData []byte) ([]byte, error) { // Create scratch space "context" ctx := C.EVP_CIPHER_CTX_new() if ctx == nil { - opensslPanic("EVP_CIPHER_CTX_new failed") + panic("EVP_CIPHER_CTX_new failed") } // Set cipher to AES-256 if C.EVP_DecryptInit_ex(ctx, C.EVP_aes_256_gcm(), nil, nil, nil) != 1 { - opensslPanic("EVP_DecryptInit_ex I failed") + panic("EVP_DecryptInit_ex I failed") } // Use 16-byte IV if C.EVP_CIPHER_CTX_ctrl(ctx, C.EVP_CTRL_GCM_SET_IVLEN, ivLen, nil) != 1 { - opensslPanic("EVP_CIPHER_CTX_ctrl EVP_CTRL_GCM_SET_IVLEN failed") + panic("EVP_CIPHER_CTX_ctrl EVP_CTRL_GCM_SET_IVLEN failed") } // Set key and IV if C.EVP_DecryptInit_ex(ctx, nil, nil, (*C.uchar)(&g.key[0]), (*C.uchar)(&iv[0])) != 1 { - opensslPanic("EVP_DecryptInit_ex II failed") + panic("EVP_DecryptInit_ex II failed") } // Set expected GMAC tag if C.EVP_CIPHER_CTX_ctrl(ctx, C.EVP_CTRL_GCM_SET_TAG, tagLen, (unsafe.Pointer)(&tag[0])) != 1 { - opensslPanic("EVP_CIPHER_CTX_ctrl failed") + panic("EVP_CIPHER_CTX_ctrl failed") } // Provide authentication data var resultLen C.int if C.EVP_DecryptUpdate(ctx, nil, &resultLen, (*C.uchar)(&authData[0]), C.int(len(authData))) != 1 { - opensslPanic("EVP_DecryptUpdate authData failed") + panic("EVP_DecryptUpdate authData failed") } if int(resultLen) != len(authData) { log.Panicf("Unexpected length %d", resultLen) @@ -176,7 +160,7 @@ func (g stupidGCM) Open(dst, iv, in, authData []byte) ([]byte, error) { // Decrypt "ciphertext" into "buf" if C.EVP_DecryptUpdate(ctx, (*C.uchar)(&buf[0]), &resultLen, (*C.uchar)(&ciphertext[0]), C.int(len(ciphertext))) != 1 { - opensslPanic("EVP_DecryptUpdate failed") + panic("EVP_DecryptUpdate failed") } if int(resultLen) != len(ciphertext) { log.Panicf("Unexpected length %d", resultLen) |