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Introduced new AES-256 encryption method for new emails

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Signed-off-by: Janos SUTO <sj@acts.hu>
This commit is contained in:
Janos SUTO 2020-12-04 16:30:59 +01:00
parent 613f25848d
commit d2f3f018c0
3 changed files with 18 additions and 5 deletions
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15
src/archive.c
View File

@ -162,18 +162,29 @@ int retrieve_file_from_archive(char *filename, int mode, char **buffer, FILE *de
return 1;
}
// The new encryption scheme uses piler id starting with 5000....
if(cfg->encrypt_messages == 1){
#if OPENSSL_VERSION_NUMBER < 0x10100000L
EVP_CIPHER_CTX_init(&ctx);
EVP_DecryptInit_ex(&ctx, EVP_bf_cbc(), NULL, cfg->key, cfg->iv);
if(strstr(filename, "/5000")){
EVP_DecryptInit_ex(&ctx, EVP_aes_256_cbc(), NULL, cfg->key, cfg->iv);
} else {
EVP_DecryptInit_ex(&ctx, EVP_bf_cbc(), NULL, cfg->key, cfg->iv);
}
blocklen = EVP_CIPHER_CTX_block_size(&ctx);
#else
ctx = EVP_CIPHER_CTX_new();
if(!ctx) goto CLEANUP;
EVP_CIPHER_CTX_init(ctx);
EVP_DecryptInit_ex(ctx, EVP_bf_cbc(), NULL, cfg->key, cfg->iv);
if(strstr(filename, "/5000")){
EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, cfg->key, cfg->iv);
} else {
EVP_DecryptInit_ex(ctx, EVP_bf_cbc(), NULL, cfg->key, cfg->iv);
}
blocklen = EVP_CIPHER_CTX_block_size(ctx);
#endif

4
src/misc.c
View File

@ -265,11 +265,13 @@ void create_id(char *id, unsigned char server_id){
get_random_bytes(buf, RND_STR_LEN/2, server_id);
// New encryption scheme using AES-256
buf[0] = 0x50;
for(i=0; i < RND_STR_LEN/2; i++){
sprintf(id, "%02x", buf[i]);
id += 2;
}
}

4
src/store.c
View File

@ -109,14 +109,14 @@ int store_file(struct session_data *sdata, char *filename, int len, struct confi
#if OPENSSL_VERSION_NUMBER < 0x10100000L
EVP_CIPHER_CTX_init(&ctx);
EVP_EncryptInit_ex(&ctx, EVP_bf_cbc(), NULL, cfg->key, cfg->iv);
EVP_EncryptInit_ex(&ctx, EVP_aes_256_cbc()(), NULL, cfg->key, cfg->iv);
blocklen = EVP_CIPHER_CTX_block_size(&ctx);
#else
ctx = EVP_CIPHER_CTX_new();
if(!ctx) goto ENDE;
EVP_CIPHER_CTX_init(ctx);
EVP_EncryptInit_ex(ctx, EVP_bf_cbc(), NULL, cfg->key, cfg->iv);
EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, cfg->key, cfg->iv);
blocklen = EVP_CIPHER_CTX_block_size(ctx);
#endif