Trance-0/CSE4303H1
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

add? update

Browse Source
This commit is contained in:
Zheyuan Wu
2026-02-11 17:31:34 -06:00
parent a03f90a4ba
commit 6cc8ce61b3
5 changed files with 22 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
client.cpp
View File

@@ -46,13 +46,19 @@ int stream_encrypt(unsigned char *plaintext, int plaintext_len, unsigned char *k
/* Initialise the encryption operation. */
// choice for aes_256 ref: https://stackoverflow.com/questions/1220751/how-to-choose-an-aes-encryption-mode-cbc-ecb-ctr-ocb-cfb
EVP_EncryptInit_ex(ctx, EVP_aes_256_ctr(), NULL, key, iv);
if (EVP_EncryptInit_ex(ctx, EVP_aes_256_ctr(), NULL, key, iv) != 1){
ERR_print_errors_fp(stderr);
}
/* Provide the message to be encrypted, and obtain the encrypted output. EVP_EncryptUpdate can be called multiple times if necessary */
EVP_EncryptUpdate(ctx, ciphertext, &len, plaintext, plaintext_len);
if (EVP_EncryptUpdate(ctx, ciphertext, &len, plaintext, plaintext_len) != 1) {
ERR_print_errors_fp(stderr);
}
/* Finalize the encryption. Further cipher text bytes may be written at this stage. */
EVP_EncryptFinal_ex(ctx, ciphertext + len, &ciphertext_len);
if (EVP_EncryptFinal_ex(ctx, ciphertext + len, &ciphertext_len) != 1) {
ERR_print_errors_fp(stderr);
}
/* Clean up */
EVP_CIPHER_CTX_free(ctx);