void enc_key_init(int method, const char *pass)
{
if (method <= TABLE || method >= CIPHER_NUM) {
LOGE("enc_key_init(): Illegal method");
return;
}
#if defined(USE_CRYPTO_OPENSSL)
OpenSSL_add_all_algorithms();
#endif
uint8_t iv[MAX_IV_LENGTH];
const cipher_kt_t *cipher = get_cipher_type(method);
if (cipher == NULL) {
LOGE("Cipher %s not found in crypto library", supported_ciphers[method]);
FATAL("Cannot initialize cipher");
}
const digest_type_t *md = get_digest_type("MD5");
if (md == NULL) {
FATAL("MD5 Digest not found in crypto library");
}
enc_key_len = bytes_to_key(cipher, md, (const uint8_t *) pass, enc_key, iv);
if (enc_key_len == 0) {
FATAL("Cannot generate key and IV");
}
enc_iv_len = cipher_iv_size(cipher);
}
void enc_key_init(int method, const char *pass)
{
if (method <= TABLE || method >= CIPHER_NUM)
{
LOGE("enc_key_init(): Illegal method");
return;
}
#if defined(USE_CRYPTO_OPENSSL)
OpenSSL_add_all_algorithms();
#endif
#if defined(USE_CRYPTO_POLARSSL) && defined(USE_CRYPTO_APPLECC)
cipher_kt_t cipher_info;
#endif
uint8_t iv[MAX_IV_LENGTH];
const cipher_kt_t *cipher = get_cipher_type(method);
if (cipher == NULL)
{
do
{
#if defined(USE_CRYPTO_POLARSSL) && defined(USE_CRYPTO_APPLECC)
if (supported_ciphers_applecc[method] != kCCAlgorithmInvalid)
{
cipher_info.base = NULL;
cipher_info.key_length = supported_ciphers_key_size[method] * 8;
cipher_info.iv_size = supported_ciphers_iv_size[method];
cipher = (const cipher_kt_t *) &cipher_info;
break;
}
#endif
LOGE("Cipher %s not found in crypto library", supported_ciphers[method]);
FATAL("Cannot initialize cipher");
}
while (0);
}
const digest_type_t *md = get_digest_type("MD5");
if (md == NULL)
{
FATAL("MD5 Digest not found in crypto library");
}
enc_key_len = bytes_to_key(cipher, md, (const uint8_t *) pass, enc_key, iv);
if (enc_key_len == 0)
{
FATAL("Cannot generate key and IV");
}
if (method == RC4_MD5)
{
enc_iv_len = 16;
}
else
{
enc_iv_len = cipher_iv_size(cipher);
}
enc_method = method;
}
struct data* do_encrypt(const struct data* in, const enum cipher cipher, const enum cipher_mode mode, const char* password) {
assert(password);
assert(in);
EVP_CIPHER_CTX* ctx = malloc(sizeof(EVP_CIPHER_CTX));
assert(ctx);
EVP_CIPHER_CTX_init(ctx);
size_t keyLength = get_key_length(cipher);
unsigned char* key = malloc(keyLength + EVP_MAX_IV_LENGTH);
unsigned char* iv = malloc(keyLength);
assert(key && iv);
const EVP_CIPHER* cipherType = get_cipher_type(cipher, mode);
assert(EVP_BytesToKey(cipherType, EVP_md5(), NULL, (const unsigned char*) password, strlen(password), 1, key, iv));
size_t bufferLength = in->len + AES_BLOCK_SIZE + EVP_MAX_IV_LENGTH;
unsigned char* buffer = malloc(bufferLength);
assert(buffer);
size_t length = 0;
int lengthDelta;
assert(EVP_EncryptInit_ex(ctx, cipherType, NULL, key, iv));
assert(EVP_EncryptUpdate(ctx, buffer, &lengthDelta, in->bytes, in->len));
length = lengthDelta;
assert(EVP_EncryptFinal_ex(ctx, buffer + length, &lengthDelta));
length += lengthDelta;
EVP_CIPHER_CTX_cleanup(ctx);
struct data* out = malloc(sizeof(struct data));
out->bytes = buffer;
out->len = length;
return out;
}
void cipher_context_init(cipher_ctx_t *evp, int method, int enc)
{
if (method <= TABLE || method >= CIPHER_NUM) {
LOGE("cipher_context_init(): Illegal method");
return;
}
const char *ciphername = supported_ciphers[method];
const cipher_kt_t *cipher = get_cipher_type(method);
#if defined(USE_CRYPTO_OPENSSL)
if (cipher == NULL) {
LOGE("Cipher %s not found in OpenSSL library", ciphername);
FATAL("Cannot initialize cipher");
}
EVP_CIPHER_CTX_init(evp);
if (!EVP_CipherInit_ex(evp, cipher, NULL, NULL, NULL, enc)) {
LOGE("Cannot initialize cipher %s", ciphername);
exit(EXIT_FAILURE);
}
if (!EVP_CIPHER_CTX_set_key_length(evp, enc_key_len)) {
EVP_CIPHER_CTX_cleanup(evp);
LOGE("Invalid key length: %d", enc_key_len);
exit(EXIT_FAILURE);
}
if (method > RC4) {
EVP_CIPHER_CTX_set_padding(evp, 1);
}
#elif defined(USE_CRYPTO_POLARSSL)
if (cipher == NULL) {
LOGE("Cipher %s not found in PolarSSL library", ciphername);
FATAL("Cannot initialize PolarSSL cipher");
}
if (cipher_init_ctx(evp, cipher) != 0) {
FATAL("Cannot initialize PolarSSL cipher context");
}
#endif
}
void cipher_context_init(cipher_ctx_t *ctx, int method, int enc)
{
if (method <= TABLE || method >= CIPHER_NUM) {
LOGE("cipher_context_init(): Illegal method");
return;
}
if (method >= SALSA20) {
enc_iv_len = supported_ciphers_iv_size[method];
return;
}
const char *ciphername = supported_ciphers[method];
#if defined(USE_CRYPTO_APPLECC)
cipher_cc_t *cc = &ctx->cc;
cc->cryptor = NULL;
cc->cipher = supported_ciphers_applecc[method];
if (cc->cipher == kCCAlgorithmInvalid) {
cc->valid = kCCContextInvalid;
} else {
cc->valid = kCCContextValid;
if (cc->cipher == kCCAlgorithmRC4) {
cc->mode = kCCModeRC4;
cc->padding = ccNoPadding;
} else {
cc->mode = kCCModeCFB;
cc->padding = ccPKCS7Padding;
}
return;
}
#endif
cipher_evp_t *evp = &ctx->evp;
const cipher_kt_t *cipher = get_cipher_type(method);
#if defined(USE_CRYPTO_OPENSSL)
if (cipher == NULL) {
LOGE("Cipher %s not found in OpenSSL library", ciphername);
FATAL("Cannot initialize cipher");
}
EVP_CIPHER_CTX_init(evp);
if (!EVP_CipherInit_ex(evp, cipher, NULL, NULL, NULL, enc)) {
LOGE("Cannot initialize cipher %s", ciphername);
exit(EXIT_FAILURE);
}
if (!EVP_CIPHER_CTX_set_key_length(evp, enc_key_len)) {
EVP_CIPHER_CTX_cleanup(evp);
LOGE("Invalid key length: %d", enc_key_len);
exit(EXIT_FAILURE);
}
if (method > RC4_MD5) {
EVP_CIPHER_CTX_set_padding(evp, 1);
}
#elif defined(USE_CRYPTO_POLARSSL)
if (cipher == NULL) {
LOGE("Cipher %s not found in PolarSSL library", ciphername);
FATAL("Cannot initialize PolarSSL cipher");
}
if (cipher_init_ctx(evp, cipher) != 0) {
FATAL("Cannot initialize PolarSSL cipher context");
}
#elif defined(USE_CRYPTO_MBEDTLS)
// XXX: mbedtls_cipher_setup future change
// NOTE: Currently also clears structure. In future versions you will be required to call
// mbedtls_cipher_init() on the structure first.
// void mbedtls_cipher_init( mbedtls_cipher_context_t *ctx );
if (cipher == NULL) {
LOGE("Cipher %s not found in mbed TLS library", ciphername);
FATAL("Cannot initialize mbed TLS cipher");
}
mbedtls_cipher_init(evp);
if (mbedtls_cipher_setup(evp, cipher) != 0) {
FATAL("Cannot initialize mbed TLS cipher context");
}
#endif
}
void enc_key_init(int method, const char *pass)
{
if (method <= TABLE || method >= CIPHER_NUM) {
LOGE("enc_key_init(): Illegal method");
return;
}
// Inilitialize cache
cache_create(&iv_cache, 256, NULL);
#if defined(USE_CRYPTO_OPENSSL)
OpenSSL_add_all_algorithms();
#endif
uint8_t iv[MAX_IV_LENGTH];
cipher_kt_t *cipher;
cipher_kt_t cipher_info;
if (method == SALSA20 || method == CHACHA20 || method == CHACHA20IETF) {
if (sodium_init() == -1) {
FATAL("Failed to initialize sodium");
}
// Fake cipher
cipher = (cipher_kt_t *)&cipher_info;
#if defined(USE_CRYPTO_OPENSSL)
cipher->key_len = supported_ciphers_key_size[method];
cipher->iv_len = supported_ciphers_iv_size[method];
#endif
#if defined(USE_CRYPTO_POLARSSL)
cipher->base = NULL;
cipher->key_length = supported_ciphers_key_size[method] * 8;
cipher->iv_size = supported_ciphers_iv_size[method];
#endif
#if defined(USE_CRYPTO_MBEDTLS)
// XXX: key_length changed to key_bitlen in mbed TLS 2.0.0
cipher->base = NULL;
cipher->key_bitlen = supported_ciphers_key_size[method] * 8;
cipher->iv_size = supported_ciphers_iv_size[method];
#endif
} else {
cipher = (cipher_kt_t *)get_cipher_type(method);
}
if (cipher == NULL) {
do {
#if defined(USE_CRYPTO_POLARSSL) && defined(USE_CRYPTO_APPLECC)
if (supported_ciphers_applecc[method] != kCCAlgorithmInvalid) {
cipher_info.base = NULL;
cipher_info.key_length = supported_ciphers_key_size[method] * 8;
cipher_info.iv_size = supported_ciphers_iv_size[method];
cipher = (cipher_kt_t *)&cipher_info;
break;
}
#endif
#if defined(USE_CRYPTO_MBEDTLS) && defined(USE_CRYPTO_APPLECC)
// XXX: key_length changed to key_bitlen in mbed TLS 2.0.0
if (supported_ciphers_applecc[method] != kCCAlgorithmInvalid) {
cipher_info.base = NULL;
cipher_info.key_bitlen = supported_ciphers_key_size[method] * 8;
cipher_info.iv_size = supported_ciphers_iv_size[method];
cipher = (cipher_kt_t *)&cipher_info;
break;
}
#endif
LOGE("Cipher %s not found in crypto library",
supported_ciphers[method]);
FATAL("Cannot initialize cipher");
} while (0);
}
const digest_type_t *md = get_digest_type("MD5");
if (md == NULL) {
FATAL("MD5 Digest not found in crypto library");
}
enc_key_len = bytes_to_key(cipher, md, (const uint8_t *)pass, enc_key, iv);
if (enc_key_len == 0) {
FATAL("Cannot generate key and IV");
}
if (method == RC4_MD5) {
enc_iv_len = 16;
} else {
enc_iv_len = cipher_iv_size(cipher);
}
enc_method = method;
}
void cipher_context_init(cipher_ctx_t *ctx, int method, int enc)
{
if (method <= TABLE || method >= CIPHER_NUM)
{
LOGE("cipher_context_init(): Illegal method");
return;
}
const char *ciphername = supported_ciphers[method];
#if defined(USE_CRYPTO_APPLECC)
cipher_cc_t *cc = &ctx->cc;
cc->cryptor = NULL;
cc->cipher = supported_ciphers_applecc[method];
if (cc->cipher == kCCAlgorithmInvalid)
{
cc->valid = kCCContextInvalid;
}
else
{
cc->valid = kCCContextValid;
if (cc->cipher == kCCAlgorithmRC4)
{
cc->mode = kCCModeRC4;
cc->padding = ccNoPadding;
}
else
{
cc->mode = kCCModeCFB;
cc->padding = ccPKCS7Padding;
}
return;
}
#endif
cipher_evp_t *evp = &ctx->evp;
const cipher_kt_t *cipher = get_cipher_type(method);
#if defined(USE_CRYPTO_OPENSSL)
if (cipher == NULL)
{
LOGE("Cipher %s not found in OpenSSL library", ciphername);
FATAL("Cannot initialize cipher");
}
EVP_CIPHER_CTX_init(evp);
if (!EVP_CipherInit_ex(evp, cipher, NULL, NULL, NULL, enc))
{
LOGE("Cannot initialize cipher %s", ciphername);
exit(EXIT_FAILURE);
}
if (!EVP_CIPHER_CTX_set_key_length(evp, enc_key_len))
{
EVP_CIPHER_CTX_cleanup(evp);
LOGE("Invalid key length: %d", enc_key_len);
exit(EXIT_FAILURE);
}
if (method > RC4_MD5)
{
EVP_CIPHER_CTX_set_padding(evp, 1);
}
#elif defined(USE_CRYPTO_POLARSSL)
if (cipher == NULL)
{
LOGE("Cipher %s not found in PolarSSL library", ciphername);
FATAL("Cannot initialize PolarSSL cipher");
}
if (cipher_init_ctx(evp, cipher) != 0)
{
FATAL("Cannot initialize PolarSSL cipher context");
}
#endif
}
