From b78436ff1e9afd767c3da473d34b7553d8411b6a Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Fri, 26 Dec 2014 18:22:13 +0100 Subject: [PATCH] Remove AES-GCM support. --- src/cipher.h | 8 --- src/openssl/cipher.c | 126 ------------------------------------------- 2 files changed, 134 deletions(-) diff --git a/src/cipher.h b/src/cipher.h index bbba569..47cd1cd 100644 --- a/src/cipher.h +++ b/src/cipher.h @@ -34,16 +34,8 @@ extern size_t cipher_keylength(const cipher_t *); extern void cipher_get_key(const cipher_t *, void *); extern bool cipher_set_key(cipher_t *, void *, bool) __attribute__ ((__warn_unused_result__)); extern bool cipher_set_key_from_rsa(cipher_t *, void *, size_t, bool) __attribute__ ((__warn_unused_result__)); -extern bool cipher_set_counter(cipher_t *, const void *, size_t) __attribute__ ((__warn_unused_result__)); -extern bool cipher_set_counter_key(cipher_t *, void *) __attribute__ ((__warn_unused_result__)); extern bool cipher_encrypt(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen, bool oneshot) __attribute__ ((__warn_unused_result__)); extern bool cipher_decrypt(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen, bool oneshot) __attribute__ ((__warn_unused_result__)); -extern bool cipher_gcm_encrypt(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen) __attribute__ ((__warn_unused_result__)); -extern bool cipher_gcm_encrypt_start(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen) __attribute__ ((__warn_unused_result__)); -extern bool cipher_gcm_encrypt_finish(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen) __attribute__ ((__warn_unused_result__)); -extern bool cipher_gcm_decrypt(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen) __attribute__ ((__warn_unused_result__)); -extern bool cipher_gcm_decrypt_start(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen) __attribute__ ((__warn_unused_result__)); -extern bool cipher_gcm_decrypt_finish(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen) __attribute__ ((__warn_unused_result__)); extern int cipher_get_nid(const cipher_t *); extern bool cipher_active(const cipher_t *); diff --git a/src/openssl/cipher.c b/src/openssl/cipher.c index 5172d82..9b39a28 100644 --- a/src/openssl/cipher.c +++ b/src/openssl/cipher.c @@ -30,15 +30,8 @@ struct cipher { EVP_CIPHER_CTX ctx; const EVP_CIPHER *cipher; - struct cipher_counter *counter; }; -typedef struct cipher_counter { - unsigned char counter[CIPHER_MAX_IV_SIZE]; - unsigned char block[CIPHER_MAX_IV_SIZE]; - int n; -} cipher_counter_t; - static cipher_t *cipher_open(const EVP_CIPHER *evp_cipher) { cipher_t *cipher = xzalloc(sizeof *cipher); cipher->cipher = evp_cipher; @@ -76,7 +69,6 @@ void cipher_close(cipher_t *cipher) { return; EVP_CIPHER_CTX_cleanup(&cipher->ctx); - free(cipher->counter); free(cipher); } @@ -117,124 +109,6 @@ bool cipher_set_key_from_rsa(cipher_t *cipher, void *key, size_t len, bool encry return false; } -bool cipher_set_counter(cipher_t *cipher, const void *counter, size_t len) { - if(len > cipher->cipher->iv_len - 4) { - logger(DEBUG_ALWAYS, LOG_ERR, "Counter too long"); - return false; - } - - memcpy(cipher->counter->counter, counter, len); - cipher->counter->n = 0; - - return true; -} - -bool cipher_set_counter_key(cipher_t *cipher, void *key) { - int result = EVP_EncryptInit_ex(&cipher->ctx, cipher->cipher, NULL, (unsigned char *)key, NULL); - if(!result) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while setting key: %s", ERR_error_string(ERR_get_error(), NULL)); - return false; - } - - if(!cipher->counter) - cipher->counter = xzalloc(sizeof *cipher->counter); - else - cipher->counter->n = 0; - - memcpy(cipher->counter->counter, (unsigned char *)key + cipher->cipher->key_len, cipher->cipher->iv_len); - - return true; -} - -bool cipher_gcm_encrypt_start(cipher_t *cipher, const void *indata, size_t inlen, void *outdata, size_t *outlen) { - int len = 0; - if(!EVP_EncryptInit_ex(&cipher->ctx, NULL, NULL, NULL, cipher->counter->counter) - || (inlen && !EVP_EncryptUpdate(&cipher->ctx, (unsigned char *)outdata, &len, (unsigned char *)indata, inlen))) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while encrypting: %s", ERR_error_string(ERR_get_error(), NULL)); - return false; - } - if(outlen) - *outlen = len; - return true; -} - -bool cipher_gcm_encrypt_finish(cipher_t *cipher, const void *indata, size_t inlen, void *outdata, size_t *outlen) { - int len = 0, pad = 0; - if((inlen && !EVP_EncryptUpdate(&cipher->ctx, (unsigned char *)outdata, &len, (unsigned char *)indata, inlen)) - || !EVP_EncryptFinal(&cipher->ctx, (unsigned char *)outdata + len, &pad)) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while encrypting: %s", ERR_error_string(ERR_get_error(), NULL)); - return false; - } - EVP_CIPHER_CTX_ctrl(&cipher->ctx, EVP_CTRL_GCM_GET_TAG, 16, (unsigned char *)outdata + len + pad); - if(outlen) - *outlen = len + pad + 16; - return true; -} - -bool cipher_gcm_encrypt(cipher_t *cipher, const void *indata, size_t inlen, void *outdata, size_t *outlen) { - int len = 0, pad = 0; - if(!EVP_EncryptInit_ex(&cipher->ctx, NULL, NULL, NULL, cipher->counter->counter) || - !EVP_EncryptUpdate(&cipher->ctx, (unsigned char *)outdata, &len, (unsigned char *)indata, inlen) || - !EVP_EncryptFinal(&cipher->ctx, (unsigned char *)outdata + len, &pad)) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while encrypting: %s", ERR_error_string(ERR_get_error(), NULL)); - return false; - } - EVP_CIPHER_CTX_ctrl(&cipher->ctx, EVP_CTRL_GCM_GET_TAG, 16, (unsigned char *)outdata + len + pad); - if(outlen) - *outlen = len + pad + 16; - return true; -} - -bool cipher_gcm_decrypt(cipher_t *cipher, const void *indata, size_t inlen, void *outdata, size_t *outlen) { - if(inlen < 16) - return false; - - int len = 0, pad = 0; - if(!EVP_DecryptInit_ex(&cipher->ctx, NULL, NULL, NULL, cipher->counter->counter)) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while decrypting: %s", ERR_error_string(ERR_get_error(), NULL)); - return false; - } - - EVP_CIPHER_CTX_ctrl(&cipher->ctx, EVP_CTRL_GCM_SET_TAG, 16, (unsigned char *)indata + inlen - 16); - - if(!EVP_DecryptUpdate(&cipher->ctx, (unsigned char *)outdata, &len, (unsigned char *)indata, inlen - 16) || - !EVP_DecryptFinal(&cipher->ctx, (unsigned char *)outdata + len, &pad)) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while decrypting: %s", ERR_error_string(ERR_get_error(), NULL)); - return false; - } - if(outlen) - *outlen = len; - return true; -} - -bool cipher_gcm_decrypt_start(cipher_t *cipher, const void *indata, size_t inlen, void *outdata, size_t *outlen) { - int len = 0; - if(!EVP_DecryptInit_ex(&cipher->ctx, NULL, NULL, NULL, cipher->counter->counter) - || (inlen && !EVP_DecryptUpdate(&cipher->ctx, (unsigned char *)outdata, &len, (unsigned char *)indata, inlen))) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while decrypting: %s", ERR_error_string(ERR_get_error(), NULL)); - return false; - } - if(outlen) - *outlen = len; - return true; -} - -bool cipher_gcm_decrypt_finish(cipher_t *cipher, const void *indata, size_t inlen, void *outdata, size_t *outlen) { - if(inlen < 16) - return false; - - EVP_CIPHER_CTX_ctrl(&cipher->ctx, EVP_CTRL_GCM_SET_TAG, 16, (unsigned char *)indata + inlen - 16); - - int len = 0, pad = 0; - if((inlen > 16 && !EVP_DecryptUpdate(&cipher->ctx, (unsigned char *)outdata, &len, (unsigned char *)indata, inlen - 16)) - || !EVP_DecryptFinal(&cipher->ctx, (unsigned char *)outdata + len, &pad)) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while decrypting: %s", ERR_error_string(ERR_get_error(), NULL)); - return false; - } - return true; -} - - bool cipher_encrypt(cipher_t *cipher, const void *indata, size_t inlen, void *outdata, size_t *outlen, bool oneshot) { if(oneshot) { int len, pad; -- 2.25.1