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remove unused functions

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This commit is contained in:
Zheyuan Wu
2026-03-02 21:20:12 -06:00
parent 5b8e846c39
commit 453dd4de41
3 changed files with 0 additions and 80 deletions
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40
client.cpp
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@@ -18,46 +18,6 @@
#include "helper.h"
// block cipher encryption function
int block_encrypt(unsigned char *plaintext, int plaintext_len, unsigned char *key, unsigned char *iv, unsigned char *ciphertext)
{
/* Declare cipher context */
EVP_CIPHER_CTX *ctx;
int len, ciphertext_len;
/* Create and initialise the context */
ctx = EVP_CIPHER_CTX_new();
if (!ctx)
{
ERR_print_errors_fp(stderr);
}
/* 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
if (EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), 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 */
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. */
if (EVP_EncryptFinal_ex(ctx, ciphertext + len, &ciphertext_len) != 1)
{
ERR_print_errors_fp(stderr);
}
/* Clean up */
EVP_CIPHER_CTX_free(ctx);
return ciphertext_len + len;
}
int main(void)
{
load_env(".env");

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latex/H3_CSE4303_ZheyuanWu.pdf
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40
latex/H3_CSE4303_ZheyuanWu.tex
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@@ -489,46 +489,6 @@ int main(void)
#include "helper.h"
// block cipher encryption function
int block_encrypt(unsigned char *plaintext, int plaintext_len, unsigned char *key, unsigned char *iv, unsigned char *ciphertext)
{
/* Declare cipher context */
EVP_CIPHER_CTX *ctx;
int len, ciphertext_len;
/* Create and initialise the context */
ctx = EVP_CIPHER_CTX_new();
if (!ctx)
{
ERR_print_errors_fp(stderr);
}
/* 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
if (EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), 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 */
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. */
if (EVP_EncryptFinal_ex(ctx, ciphertext + len, &ciphertext_len) != 1)
{
ERR_print_errors_fp(stderr);
}
/* Clean up */
EVP_CIPHER_CTX_free(ctx);
return ciphertext_len + len;
}
int main(void)
{
load_env(".env");