int
XCBC_Init(XCBC_CTX *xctx,
const uint8_t const *k)
{
int bl, outl;
EVP_CIPHER_CTX *ctx;
uint8_t k1[XCBC_MAX_BLOCK_LENGTH];
ctx = xctx->ctx;
EVP_CIPHER_CTX_init(ctx);
OPENSSL_try(EVP_CipherInit_ex(ctx, EVP_aes_128_ecb(), NULL, k, NULL, 1),
"cipher init error", return0);
bl = EVP_CIPHER_CTX_block_size((const EVP_CIPHER_CTX *)ctx);
OPENSSL_try(EVP_CipherUpdate(ctx, k1, &outl, ks1, bl),
"cipher update error (k1)", return0);
OPENSSL_try(EVP_CipherUpdate(ctx, xctx->k2, &outl, ks2, bl),
"cipher update error (k2)", return0);
OPENSSL_try(EVP_CipherUpdate(ctx, xctx->k3, &outl, ks3, bl),
"cipher update error (k3)", return0);
OPENSSL_try(EVP_CipherInit_ex(ctx, NULL, NULL, k1, NULL, -1),
"cipher reset error", return0);
memset(xctx->e, 0, bl);
xctx->size = 0;
return 1;
return0:
return 0;
}
void encrypt_buf(struct encryption_ctx *ctx, char *buf, int *len) {
if (_method == EncryptionTable) {
table_encrypt(buf, *len);
} else {
if (ctx->status == STATUS_EMPTY) {
int iv_len = encryption_iv_len[_method];
unsigned char iv[EVP_MAX_IV_LENGTH];
memset(iv, 0, iv_len);
RAND_bytes(iv, iv_len);
init_cipher(ctx, iv, iv_len, 1);
int out_len = *len + EVP_CIPHER_CTX_block_size(ctx->ctx);
unsigned char *cipher_text = malloc(out_len);
EVP_CipherUpdate(ctx->ctx, cipher_text, &out_len, buf, *len);
memcpy(buf, iv, iv_len);
memcpy(buf + iv_len, cipher_text, out_len);
*len = iv_len + out_len;
free(cipher_text);
} else {
int out_len = *len + EVP_CIPHER_CTX_block_size(ctx->ctx);
unsigned char *cipher_text = malloc(out_len);
EVP_CipherUpdate(ctx->ctx, cipher_text, &out_len, buf, *len);
memcpy(buf, cipher_text, out_len);
*len = out_len;
free(cipher_text);
}
}
}
static int
ossl_cipher_update_long(EVP_CIPHER_CTX *ctx, unsigned char *out, long *out_len_ptr,
const unsigned char *in, long in_len)
{
int out_part_len;
long out_len = 0;
#define UPDATE_LENGTH_LIMIT INT_MAX
#if SIZEOF_LONG > UPDATE_LENGTH_LIMIT
if (in_len > UPDATE_LENGTH_LIMIT) {
const int in_part_len = (UPDATE_LENGTH_LIMIT / 2 + 1) & ~1;
do {
if (!EVP_CipherUpdate(ctx, out ? (out + out_len) : 0,
&out_part_len, in, in_part_len))
return 0;
out_len += out_part_len;
in += in_part_len;
} while ((in_len -= in_part_len) > UPDATE_LENGTH_LIMIT);
}
#endif
if (!EVP_CipherUpdate(ctx, out ? (out + out_len) : 0,
&out_part_len, in, (int)in_len))
return 0;
if (out_len_ptr) *out_len_ptr = out_len += out_part_len;
return 1;
}
int main(int N, char ** S)
{
unsigned char key[]= "helloworld" ;
unsigned char iv[]= "12345678" ;
char * destp ;
int iuse, iuse2 ;
EVP_CIPHER_CTX ctx;
OpenSSL_add_all_ciphers() ;
printf("test: (%s) len %zd.\n", test, strlen(test)) ;
EVP_CIPHER_CTX_init(&ctx) ;
// encode
EVP_CipherInit_ex(&ctx, EVP_bf_cbc(), NULL, NULL, NULL, 1);
EVP_CIPHER_CTX_set_key_length(&ctx, strlen(key));
EVP_CipherInit_ex(&ctx, NULL, NULL, key, iv, -1);
destp= buffer ;
EVP_CipherUpdate(&ctx, destp, &iuse, test, strlen(test) +1) ;
destp += iuse ;
EVP_CipherFinal_ex(&ctx, destp, &iuse) ;
destp += iuse ;
iuse= ( destp - buffer ) ;
EVP_CIPHER_CTX_cleanup(&ctx);
// decode
EVP_CipherInit_ex(&ctx, EVP_bf_cbc(), NULL, NULL, NULL, 0);
EVP_CIPHER_CTX_set_key_length(&ctx, strlen(key));
EVP_CipherInit_ex(&ctx, NULL, NULL, key, iv, -1);
destp= buffer2 ;
EVP_CipherUpdate(&ctx, destp, &iuse2, buffer, iuse ) ;
destp += iuse2 ;
EVP_CipherFinal_ex(&ctx, destp, &iuse2) ;
destp += iuse2 ;
iuse2= ( destp - buffer2 ) ;
EVP_CIPHER_CTX_cleanup(&ctx);
EVP_cleanup() ;
encode_asc85(printbuf, sizeof(printbuf), test, strlen(test) +1) ;
printf("SRC: %s\n", printbuf) ;
encode_asc85(printbuf, sizeof(printbuf), buffer, iuse) ;
printf("ENC: %s\n", printbuf) ;
encode_asc85(printbuf, sizeof(printbuf), buffer2, iuse2) ;
printf("DEC: %s\nout: %s\n", printbuf, buffer2) ;
}
static BUF_MEM *
cipher(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, ENGINE *impl,
const unsigned char *key, const unsigned char *iv, int enc, const BUF_MEM * in)
{
BUF_MEM * out = NULL;
EVP_CIPHER_CTX * tmp_ctx = NULL;
int i;
unsigned long flags;
check(in, "Invalid arguments");
if (ctx)
tmp_ctx = ctx;
else {
tmp_ctx = EVP_CIPHER_CTX_new();
if (!tmp_ctx)
goto err;
EVP_CIPHER_CTX_init(tmp_ctx);
if (!EVP_CipherInit_ex(tmp_ctx, type, impl, key, iv, enc))
goto err;
}
flags = EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(tmp_ctx));
if (flags & EVP_CIPH_NO_PADDING) {
i = in->length;
check((in->length % EVP_CIPHER_block_size(type) == 0), "Data is not of blocklength");
} else
i = in->length + EVP_CIPHER_block_size(type);
out = BUF_MEM_create(i);
if (!out)
goto err;
if (!EVP_CipherUpdate(tmp_ctx, (unsigned char *) out->data, &i,
(unsigned char *) in->data, in->length))
goto err;
out->length = i;
if (!EVP_CipherFinal_ex(tmp_ctx, (unsigned char *) (out->data + out->length),
&i))
goto err;
if (!(flags & EVP_CIPH_NO_PADDING))
out->length += i;
if (!ctx)
EVP_CIPHER_CTX_free(tmp_ctx);
return out;
err:
if (out)
BUF_MEM_free(out);
if (!ctx && tmp_ctx)
EVP_CIPHER_CTX_free(tmp_ctx);
return NULL;
}
int
XCBC_Final(XCBC_CTX *xctx,
uint8_t *out)
{
int bl, n, outl;
bl = EVP_CIPHER_CTX_block_size(xctx->ctx);
/* xctx->r = M[n] */
if (xctx->size == bl) {
for (n = 0; n < bl; n++)
xctx->m[n] = xctx->r[n] ^ xctx->e[n] ^ xctx->k2[n];
} else {
for (n = xctx->size; n < bl; n++)
xctx->r[n] = (n == xctx->size) ? 0x80 : 0x00;
for (n = 0; n < bl; n++) {
xctx->m[n] = xctx->r[n] ^ xctx->e[n] ^ xctx->k3[n];
}
}
OPENSSL_try(EVP_CipherUpdate(xctx->ctx,
xctx->e, &outl,
xctx->m, bl),
"cipher update error (finalizing)", return0);
memcpy(out, xctx->e, bl);
return 1;
return0:
return 0;
}
/*
the size of outBuf must be larger than inBufSize + blockSize
@retval positive or 0 : writeSize(+blockSize)
@retval -1 : error
*/
int update(char *outBuf, const char *inBuf, int inBufSize)
{
int outLen = 0;
int ret = EVP_CipherUpdate(&ctx_, cybozu::cast<uint8_t*>(outBuf), &outLen, cybozu::cast<const uint8_t*>(inBuf), inBufSize);
if (ret != 1) return -1;
return outLen;
}
void encryptfile(FILE * fpin,FILE* fpout,unsigned char* key, unsigned char* iv)
{
//Using openssl EVP to encrypt a file
const unsigned bufsize = 4096;
unsigned char* read_buf = malloc(bufsize);
unsigned char* cipher_buf ;
unsigned blocksize;
int out_len;
EVP_CIPHER_CTX ctx;
EVP_CipherInit(&ctx,EVP_aes_256_cbc(),key,iv,1);
blocksize = EVP_CIPHER_CTX_block_size(&ctx);
cipher_buf = malloc(bufsize+blocksize);
// read file and write encrypted file until eof
while(1)
{
int bytes_read = fread(read_buf,sizeof(unsigned char),bufsize,fpin);
EVP_CipherUpdate(&ctx,cipher_buf,&out_len,read_buf, bytes_read);
fwrite(cipher_buf,sizeof(unsigned char),out_len,fpout);
if(bytes_read < bufsize)
{
break;//EOF
}
}
EVP_CipherFinal(&ctx,cipher_buf,&out_len);
fwrite(cipher_buf,sizeof(unsigned char),out_len,fpout);
free(cipher_buf);
free(read_buf);
}
static int cipher_context_update(cipher_ctx_t *ctx, uint8_t *output, size_t *olen,
const uint8_t *input, size_t ilen)
{
#ifdef USE_CRYPTO_APPLECC
cipher_cc_t *cc = &ctx->cc;
if (cc->valid == kCCContextValid) {
CCCryptorStatus ret;
ret = CCCryptorUpdate(cc->cryptor, input, ilen, output,
ilen, olen);
return (ret == kCCSuccess) ? 1 : 0;
}
#endif
cipher_evp_t *evp = &ctx->evp;
#if defined(USE_CRYPTO_OPENSSL)
int err = 0, tlen = *olen;
err = EVP_CipherUpdate(evp, (uint8_t *)output, &tlen,
(const uint8_t *)input, ilen);
*olen = tlen;
return err;
#elif defined(USE_CRYPTO_POLARSSL)
return !cipher_update(evp, (const uint8_t *)input, ilen,
(uint8_t *)output, olen);
#elif defined(USE_CRYPTO_MBEDTLS)
return !mbedtls_cipher_update(evp, (const uint8_t *)input, ilen,
(uint8_t *)output, olen);
#endif
}
/********************do the cryption part*************************/
int do_crypt(unsigned char *key, unsigned char *iv, char *msg, int *l, int crypt) {
unsigned char outbuf[BUFSIZE + EVP_MAX_BLOCK_LENGTH];
int len = *l, outlen, tmplen, i;
unsigned char input[BUFSIZE];
memcpy(input, msg, len);
if (DEBUG) {
printf("\nbefore crypted payload: ");
for(i = 0; i < len; i++) printf("%02x", *(input+i));
putchar(10);
}
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit_ex(&ctx, EVP_aes_128_cbc(), NULL, key, iv, crypt);
if(!EVP_CipherUpdate(&ctx, outbuf, &outlen, input, len)) {
EVP_CIPHER_CTX_cleanup(&ctx);
return 0;
}
if(!EVP_CipherFinal_ex(&ctx, outbuf + outlen, &tmplen)) {
EVP_CIPHER_CTX_cleanup(&ctx);
return 0;
}
outlen += tmplen;
if (DEBUG) {
printf("\ncrypted payload: ");
for(i = 0; i < outlen; i++) printf("%02x", *(outbuf+i));
printf("\n");
}
memcpy(msg, outbuf, outlen);
*l = outlen;
EVP_CIPHER_CTX_cleanup(&ctx);
return 1;
}
void run(const char *name, unsigned char *buf, int len) {
int pass = TOTAL_LEN / len;
unsigned char key[32] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F};
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
int outlen = 0;
struct timeval start, end;
double total_time, throughput;
EVP_CIPHER *cipher = (EVP_CIPHER *) EVP_get_cipherbyname("aes-256-ecb");
EVP_CipherInit_ex(&ctx, cipher, NULL, key, NULL, 1);
gettimeofday(&start, NULL);
for (int i = 0; i < pass; i++) {
fprintf(stderr, "%s: Pass %d/%d\n", name, i + 1, pass);
// note we cannot run multiple pass on the same buffer, the CPU will cache it! (smart bastards at Intel)
EVP_CipherUpdate(&ctx, buf + i * len, &outlen, buf, len);
if (len != outlen) {
fprintf(stderr, "Fatal error: incorrect output size.\n");
}
}
gettimeofday(&end, NULL);
total_time = end.tv_sec - start.tv_sec + (end.tv_usec - start.tv_usec) / 1000000.0;
throughput = TOTAL_LEN * 8 / total_time / 1000000;
printf("%s: %u-byte blocks, %lubytes in %f s, Throughput: %fMbps\n", name, len, TOTAL_LEN, total_time, throughput);
EVP_CIPHER_CTX_cleanup(&ctx);
}
int crypt(unsigned char *inbuf, int inlen, unsigned char *outbuf, unsigned char key[],unsigned char iv[], int do_encrypt)
{
int outlen, mlen;
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit_ex(&ctx, EVP_aes_128_cbc(), NULL, key, iv, do_encrypt);
outlen = 0;
if(inlen <= 0) return 0;
if(!EVP_CipherUpdate(&ctx, outbuf + outlen, &mlen, inbuf, inlen))
{
/* Error */
EVP_CIPHER_CTX_cleanup(&ctx);
return 0;
}
outlen += mlen;
if(!EVP_CipherFinal_ex(&ctx, outbuf + outlen, &mlen))
{
/* Error */
EVP_CIPHER_CTX_cleanup(&ctx);
return 0;
}
outlen += mlen;
EVP_CIPHER_CTX_cleanup(&ctx);
return outlen;
}
JNIEXPORT int JNICALL Java_com_facebook_crypto_cipher_NativeGCMCipher_nativeUpdate(
JNIEnv* env,
jobject obj,
jbyteArray data,
jint offset,
jint dataLength,
jbyteArray output) {
int bytesWritten = 0;
EVP_CIPHER_CTX* ctx = Get_Cipher_CTX(env, obj);
if (!ctx) {
return CRYPTO_NO_BYTES_WRITTEN;
}
jbyte* outputBytes = (*env)->GetByteArrayElements(env, output, NULL);
if (!outputBytes) {
return CRYPTO_NO_BYTES_WRITTEN;
}
jbyte* dataBytes = (*env)->GetByteArrayElements(env, data, NULL);
if (!dataBytes) {
(*env)->ReleaseByteArrayElements(env, output, outputBytes, 0);
return CRYPTO_NO_BYTES_WRITTEN;
}
if (!EVP_CipherUpdate(ctx, outputBytes, &bytesWritten, dataBytes + offset, dataLength)) {
bytesWritten = CRYPTO_NO_BYTES_WRITTEN;
}
(*env)->ReleaseByteArrayElements(env, data, dataBytes, JNI_ABORT);
(*env)->ReleaseByteArrayElements(env, output, outputBytes, 0);
return bytesWritten;
}
/*
* call-seq:
* cipher.update(data [, buffer]) -> string or buffer
*
* === Parameters
* +data+ is a nonempty string.
* +buffer+ is an optional string to store the result.
*/
static VALUE
ossl_cipher_update(int argc, VALUE *argv, VALUE self)
{
EVP_CIPHER_CTX *ctx;
char *in;
int in_len, out_len;
VALUE data, str;
rb_scan_args(argc, argv, "11", &data, &str);
StringValue(data);
in = RSTRING_PTR(data);
if ((in_len = RSTRING_LEN(data)) == 0)
rb_raise(rb_eArgError, "data must not be empty");
GetCipher(self, ctx);
out_len = in_len+EVP_CIPHER_CTX_block_size(ctx);
if (NIL_P(str)) {
str = rb_str_new(0, out_len);
} else {
StringValue(str);
rb_str_resize(str, out_len);
}
if (!EVP_CipherUpdate(ctx, RSTRING_PTR(str), &out_len, in, in_len))
ossl_raise(eCipherError, NULL);
assert(out_len < RSTRING_LEN(str));
rb_str_set_len(str, out_len);
return str;
}
static int sb_aes_crypt(struct sb_image_ctx *ictx, uint8_t *in_data,
uint8_t *out_data, int in_len)
{
EVP_CIPHER_CTX *ctx = &ictx->cipher_ctx;
int ret, outlen;
uint8_t *outbuf;
outbuf = malloc(in_len);
if (!outbuf)
return -ENOMEM;
memset(outbuf, 0, sizeof(in_len));
ret = EVP_CipherUpdate(ctx, outbuf, &outlen, in_data, in_len);
if (!ret) {
ret = -EINVAL;
goto err;
}
if (out_data)
memcpy(out_data, outbuf, outlen);
err:
free(outbuf);
return ret;
}
bool CryptoBuffer::doCrypt(const char *in, int inlen, bool isEncrypt, QByteArray &out)
{
const int OUTBUF_SIZE = 8*1024;
unsigned char outbuf[OUTBUF_SIZE + EVP_MAX_BLOCK_LENGTH];
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
auto ctxGuard = makeGuard([&ctx] { EVP_CIPHER_CTX_cleanup(&ctx); });
if (!EVP_CipherInit_ex(&ctx, d->cipher, NULL, d->key, d->iv, isEncrypt))
return DEBUGRET(false, "EVP_CipherInit_Ex failed");
const unsigned char *ptr = reinterpret_cast<const unsigned char*>(in);
int restlen = inlen;
int outlen;
while (restlen > 0)
{
int readlen = std::min(restlen, OUTBUF_SIZE);
if (!EVP_CipherUpdate(&ctx, outbuf, &outlen, ptr, readlen))
return DEBUGRET(false, "EVP_CipherUpdate failed");
out.append(reinterpret_cast<const char*>(outbuf), outlen);
ptr += readlen;
restlen -= readlen;
}
if (!EVP_CipherFinal_ex(&ctx, outbuf, &outlen))
return DEBUGRET(false, "EVP_CipherFinal_ex failed");
out.append(reinterpret_cast<const char*>(outbuf), outlen);
return true;
}
size_t Cipher::put(const uint8_t *data, size_t size)
{
int outlen;
size_t count = 0;
if(!bufaddr)
return 0;
if(size % keys.iosize())
return 0;
while(bufsize && size + bufpos > bufsize) {
size_t diff = bufsize - bufpos;
count += put(data, diff);
data += diff;
size -= diff;
}
if(!EVP_CipherUpdate((EVP_CIPHER_CTX *)context, bufaddr + bufpos, &outlen, data, (int)size)) {
release();
return count;
}
bufpos += outlen;
count += outlen;
if(bufsize && bufpos >= bufsize) {
push(bufaddr, bufsize);
bufpos = 0;
}
return count;
}
static int
do_cipher(EVP_CIPHER_CTX *cipher_ctx, const u8 *in, size_t in_len,
u8 **out, size_t *out_len)
{
const u8 *end;
u8 *p;
size_t bl, done, left, total;
*out = p = (u8 *) malloc(in_len + EVP_CIPHER_CTX_key_length(cipher_ctx));
*out_len = total = 0;
bl = EVP_CIPHER_CTX_block_size(cipher_ctx);
end = in + in_len;
while (in < end) {
if ((left = end - in) > bl)
left = bl;
if (!EVP_CipherUpdate(cipher_ctx,
p + total, (int *) &done,
(u8 *) in, (int)left))
goto fail;
total += done;
in += left;
}
if (1 || total < in_len) {
if (!EVP_CipherFinal(cipher_ctx, p + total, (int *) &done))
goto fail;
total += done;
}
*out_len = total;
return 0;
fail: free(p);
return SC_ERROR_INTERNAL;
}
/* evp_cipher_ctx method */
static LUA_FUNCTION(openssl_evp_cipher_update)
{
EVP_CIPHER_CTX* c = CHECK_OBJECT(1, EVP_CIPHER_CTX, "openssl.evp_cipher_ctx");
size_t inl;
const char* in = luaL_checklstring(L, 2, &inl);
int outl = inl + EVP_MAX_BLOCK_LENGTH;
char* out = OPENSSL_malloc(outl);
CIPHER_MODE mode;
int ret = 0;
lua_rawgetp(L, LUA_REGISTRYINDEX, c);
mode = lua_tointeger(L, -1);
if (mode == DO_CIPHER)
ret = EVP_CipherUpdate(c, (byte*)out, &outl, (const byte*)in, inl);
else if (mode == DO_ENCRYPT)
ret = EVP_EncryptUpdate(c, (byte*)out, &outl, (const byte*)in, inl);
else if (mode == DO_DECRYPT)
ret = EVP_DecryptUpdate(c, (byte*)out, &outl, (const byte*)in, inl);
else
luaL_error(L, "never go here");
lua_pop(L, 1);
if (ret == 1)
{
lua_pushlstring(L, out, outl);
}
OPENSSL_free(out);
return (ret == 1 ? ret : openssl_pushresult(L, ret));
}
static int enc_write(BIO *b, const char *in, int inl)
{
int ret = 0, n, i;
BIO_ENC_CTX *ctx;
BIO *next;
ctx = BIO_get_data(b);
next = BIO_next(b);
if ((ctx == NULL) || (next == NULL))
return 0;
ret = inl;
BIO_clear_retry_flags(b);
n = ctx->buf_len - ctx->buf_off;
while (n > 0) {
i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
if (i <= 0) {
BIO_copy_next_retry(b);
return (i);
}
ctx->buf_off += i;
n -= i;
}
/* at this point all pending data has been written */
if ((in == NULL) || (inl <= 0))
return (0);
ctx->buf_off = 0;
while (inl > 0) {
n = (inl > ENC_BLOCK_SIZE) ? ENC_BLOCK_SIZE : inl;
if (!EVP_CipherUpdate(ctx->cipher,
ctx->buf, &ctx->buf_len,
(const unsigned char *)in, n)) {
BIO_clear_retry_flags(b);
ctx->ok = 0;
return 0;
}
inl -= n;
in += n;
ctx->buf_off = 0;
n = ctx->buf_len;
while (n > 0) {
i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
if (i <= 0) {
BIO_copy_next_retry(b);
return (ret == inl) ? i : ret - inl;
}
n -= i;
ctx->buf_off += i;
}
ctx->buf_len = 0;
ctx->buf_off = 0;
}
BIO_copy_next_retry(b);
return (ret);
}
int
cipher_ctx_update (EVP_CIPHER_CTX *ctx, uint8_t *dst, int *dst_len,
uint8_t *src, int src_len)
{
if (!EVP_CipherUpdate (ctx, dst, dst_len, src, src_len))
crypto_msg(M_FATAL, "%s: EVP_CipherUpdate() failed", __func__);
return 1;
}
HRESULT CBCipher::do_crypt(VARIANT varInput, VARIANT varOutput, VARIANT* pVal, int enc)
{
if(!m_ctx.cipher)return SetErrorInfo(s_strAlgoError);
if(m_iKeySize == EVP_CIPHER_key_length(m_ctx.cipher))
EVP_CipherInit_ex(&m_ctx, m_ctx.cipher, NULL, m_pKey, m_pIV, enc);
else
{
EVP_CipherInit_ex(&m_ctx, m_ctx.cipher, NULL, NULL, NULL, enc);
EVP_CIPHER_CTX_set_key_length(&m_ctx, m_iKeySize);
EVP_CipherInit_ex(&m_ctx, NULL, NULL, m_pKey, m_pIV, enc);
}
if(!m_bPadding)EVP_CIPHER_CTX_set_padding(&m_ctx, 0);
HRESULT hr;
CBComPtr<IStream> pSrcStream;
CBComPtr<IStream> pDescStream1;
IStream* pDescStream;
CBTempStream mStream;
hr = CBStream::GetStream(&varInput, &pSrcStream);
if(FAILED(hr))return hr;
if(varOutput.vt != VT_ERROR)
{
hr = CBStream::GetStream(&varOutput, &pDescStream1, FALSE);
if(FAILED(hr))return hr;
pDescStream = pDescStream1;
}else pDescStream = &mStream;
BYTE inbuf[1024], outbuf[1024 + EVP_MAX_BLOCK_LENGTH];
ULONG inlen, outlen, wrlen;
while(1)
{
hr = pSrcStream->Read(inbuf, sizeof(inbuf), &inlen);
if(FAILED(hr))return hr;
if(inlen == 0)break;
if(!EVP_CipherUpdate(&m_ctx, outbuf, (int*)&outlen, inbuf, inlen))
return E_FAIL;
hr = pDescStream->Write(outbuf, outlen, &wrlen);
if(FAILED(hr))return hr;
}
if(!EVP_CipherFinal_ex(&m_ctx, outbuf, (int*)&outlen))
return E_FAIL;
hr = pDescStream->Write(outbuf, outlen, &wrlen);
if(FAILED(hr))return hr;
if(mStream.GetLength())
return mStream.GetVariant(pVal);
return S_OK;
}
int cipher_context_update(cipher_ctx_t *evp, uint8_t *output, int *olen, \
const uint8_t *input, int ilen) {
#if defined(USE_CRYPTO_OPENSSL)
return EVP_CipherUpdate(evp, (uint8_t *) output, (size_t *) olen, \
(const uint8_t *) input, (size_t) ilen);
#elif defined(USE_CRYPTO_POLARSSL)
return !cipher_update(evp, (const uint8_t *) input, (size_t) ilen, \
(uint8_t *) output, (size_t *) olen);
#endif
}
//key:128
//encrypt output:nonce(12)+tag(16)+cipher_text
//no aad
//
int Encrypt_AesGcm128(const uint8_t * plain_text, uint32_t plain_text_len,
const SecureString & key, string & cipher_text){
cipher_text.clear();
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
EVP_CIPHER * cipher=EVP_aes_128_gcm();
if(1 != EVP_EncryptInit_ex(&ctx, cipher, NULL, NULL, NULL))
return LIB_ERR;
unsigned char nonce[GCM_NONCE_LENGTH]={};
RAND_bytes(nonce,4);
struct timeval t={0,0};
if(0==gettimeofday(&t,NULL)){
memcpy(&nonce[4],&t.tv_sec,4);
memcpy(&nonce[8],&t.tv_nsec,4);
}else{
RAND_bytes(&nonce[4],GCM_NONCE_LENGTH-4);
}
if(1 != EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_GCM_SET_IVLEN, GCM_NONCE_LENGTH, NULL))
return LIB_ERR;
if(1 != EVP_EncryptInit_ex(&ctx, NULL, NULL, key.data(), &nonce[0]))
return LIB_ERR;
cipher_text.reserve(GCM_NONCE_LENGTH+GCM_TAG_LENGTH+plain_text_len);
cipher_text.append(&nonce[0],GCM_NONCE_LENGTH);
cipher_text.append(GCM_TAG_LENGTH,0);//fill tag later
cipher_text.resize(GCM_NONCE_LENGTH+GCM_TAG_LENGTH+plain_text_len);
//do the real encryption.
int out_len=plain_text_len;
const int ret = EVP_CipherUpdate(&ctx,&cipher_text[GCM_NONCE_LENGTH+GCM_TAG_LENGTH],&out_len, plain_text,plain_text_len);
if(1!=ret){
cipher_text.clear();
return LIB_ERR;
}
out_len=0;
if(1 != EVP_CipherFinal_ex(&ctx,cipher_text.end(),out_len) ){
cipher_text.clear();
return LIB_ERR;
}
/* Get the tag */
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_GET_TAG, 16, &cipher_text[GCM_NONCE_LENGTH])){
cipher_text.clear();
return LIB_ERR;
}
return OK;
}
bool Crypto_t::symmetricCipher(const std::vector<unsigned char>& in_buffer, int nid, const std::string& key, const std::string& iv, bool encode, std::vector<unsigned char>& buffer)
{
// load all cipher modules
OpenSSL_add_all_ciphers();
// Select the specific cipher module
const EVP_CIPHER* cipher = EVP_get_cipherbynid(nid);
if (!cipher) return false;
// Each cipher has its own taste for the key and IV. So we need to check if the input key and IV is appropriate
// for the specific cipher module
if (key.size() < static_cast<size_t>(EVP_CIPHER_key_length(cipher)) || iv.size() < static_cast<size_t>(EVP_CIPHER_iv_length(cipher)))
{
return false;
}
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit_ex(&ctx, cipher, NULL, (const unsigned char*)key.c_str(), (const unsigned char*)iv.c_str(), encode);
size_t block_size = EVP_CIPHER_block_size(cipher);
unsigned char* encrypt_buffer = (unsigned char*) malloc(block_size + in_buffer.size());
// Read the raw buffer and convert to encrypt one. And then collect to the output buffer
int out_count = 0;
buffer.clear();
bool fail = false;
while (true)
{
if (!EVP_CipherUpdate(&ctx, encrypt_buffer, &out_count, &in_buffer[0], in_buffer.size()))
{
fail = true;
break;
}
for (int i = 0; i < out_count; i++)
buffer.push_back(encrypt_buffer[i]);
// handling the last block
unsigned char* block = encrypt_buffer + out_count;
if (!EVP_CipherFinal_ex(&ctx, block, &out_count))
{
fail = true;
break;
}
for (int i = 0; i < out_count; i++)
buffer.push_back(block[i]);
break;
}
// free resource
free(encrypt_buffer);
EVP_CIPHER_CTX_cleanup(&ctx);
return (fail == true) ? (false) : (true);
}
static int test_afalg_aes_128_cbc(void)
{
EVP_CIPHER_CTX *ctx;
const EVP_CIPHER *cipher = EVP_aes_128_cbc();
unsigned char key[] = "\x5F\x4D\xCC\x3B\x5A\xA7\x65\xD6\
\x1D\x83\x27\xDE\xB8\x82\xCF\x99";
unsigned char iv[] = "\x2B\x95\x99\x0A\x91\x51\x37\x4A\
\xBD\x8F\xF8\xC5\xA7\xA0\xFE\x08";
unsigned char in[BUFFER_SIZE];
unsigned char ebuf[BUFFER_SIZE + 32];
unsigned char dbuf[BUFFER_SIZE + 32];
int encl, encf, decl, decf;
int ret = 0;
if (!TEST_ptr(ctx = EVP_CIPHER_CTX_new()))
return 0;
RAND_bytes(in, BUFFER_SIZE);
if (!TEST_true(EVP_CipherInit_ex(ctx, cipher, e, key, iv, 1))
|| !TEST_true(EVP_CipherUpdate(ctx, ebuf, &encl, in, BUFFER_SIZE))
|| !TEST_true(EVP_CipherFinal_ex(ctx, ebuf+encl, &encf)))
goto end;
encl += encf;
if (!TEST_true(EVP_CIPHER_CTX_reset(ctx))
|| !TEST_true(EVP_CipherInit_ex(ctx, cipher, e, key, iv, 0))
|| !TEST_true(EVP_CipherUpdate(ctx, dbuf, &decl, ebuf, encl))
|| !TEST_true(EVP_CipherFinal_ex(ctx, dbuf+decl, &decf)))
goto end;
decl += decf;
if (!TEST_int_eq(decl, BUFFER_SIZE)
|| !TEST_mem_eq(dbuf, BUFFER_SIZE, in, BUFFER_SIZE))
goto end;
ret = 1;
end:
EVP_CIPHER_CTX_free(ctx);
return ret;
}
void Encrypt::write(Slice src, Slice target) {
checkArgument(src.length() == target.length(), "Target slice is the same length as src slice");
checkState(State::PROGRESS, State::PROGRESS, "Encryption not in progress");
int bytesWritten;
int code = EVP_CipherUpdate(ctx_, target.offset(0), &bytesWritten, src.offset(0), src.length());
check(code == EVP_SUCCESS, "Chunk encryption failed");
// GCM will output exactly the same amount of bytes
check(bytesWritten == static_cast<int>(src.length()),
"CipherUpdate didn't encrypt the exact chunk");
}
static int ber_write(BIO *b, char *in, int inl)
{
int ret=0,n,i;
BIO_ENC_CTX *ctx;
ctx=(BIO_ENC_CTX *)b->ptr;
ret=inl;
BIO_clear_retry_flags(b);
n=ctx->buf_len-ctx->buf_off;
while (n > 0)
{
i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
if (i <= 0)
{
BIO_copy_next_retry(b);
return(i);
}
ctx->buf_off+=i;
n-=i;
}
/* at this point all pending data has been written */
if ((in == NULL) || (inl <= 0)) return(0);
ctx->buf_off=0;
while (inl > 0)
{
n=(inl > ENC_BLOCK_SIZE)?ENC_BLOCK_SIZE:inl;
EVP_CipherUpdate(&(ctx->cipher),
(unsigned char *)ctx->buf,&ctx->buf_len,
(unsigned char *)in,n);
inl-=n;
in+=n;
ctx->buf_off=0;
n=ctx->buf_len;
while (n > 0)
{
i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
if (i <= 0)
{
BIO_copy_next_retry(b);
return(i);
}
n-=i;
ctx->buf_off+=i;
}
ctx->buf_len=0;
ctx->buf_off=0;
}
BIO_copy_next_retry(b);
return(ret);
}
static int cms_kek_cipher(unsigned char **pout, size_t *poutlen,
const unsigned char *in, size_t inlen,
CMS_KeyAgreeRecipientInfo *kari, int enc)
{
/* Key encryption key */
unsigned char kek[EVP_MAX_KEY_LENGTH];
size_t keklen;
int rv = 0;
unsigned char *out = NULL;
int outlen;
keklen = EVP_CIPHER_CTX_key_length(kari->ctx);
if (keklen > EVP_MAX_KEY_LENGTH)
return 0;
/* Derive KEK */
if (EVP_PKEY_derive(kari->pctx, kek, &keklen) <= 0)
goto err;
/* Set KEK in context */
if (!EVP_CipherInit_ex(kari->ctx, NULL, NULL, kek, NULL, enc))
goto err;
/* obtain output length of ciphered key */
if (!EVP_CipherUpdate(kari->ctx, NULL, &outlen, in, inlen))
goto err;
out = OPENSSL_malloc(outlen);
if (out == NULL)
goto err;
if (!EVP_CipherUpdate(kari->ctx, out, &outlen, in, inlen))
goto err;
*pout = out;
*poutlen = (size_t)outlen;
rv = 1;
err:
OPENSSL_cleanse(kek, keklen);
if (!rv)
OPENSSL_free(out);
EVP_CIPHER_CTX_reset(kari->ctx);
/* FIXME: WHY IS kari->pctx freed here? /RL */
EVP_PKEY_CTX_free(kari->pctx);
kari->pctx = NULL;
return rv;
}
int
cipher_ctx_update_ad (EVP_CIPHER_CTX *ctx, const uint8_t *src, int src_len)
{
#ifdef HAVE_AEAD_CIPHER_MODES
int len;
if (!EVP_CipherUpdate (ctx, NULL, &len, src, src_len))
crypto_msg(M_FATAL, "%s: EVP_CipherUpdate() failed", __func__);
return 1;
#else
ASSERT (0);
#endif
}
