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Unified Diff: srtp/crypto/cipher/aes_icm_ossl.c

Issue 2344973002: Update libsrtp to version 2.0 (Closed)
Patch Set: Add '.' back to include_dirs Created 4 years, 2 months ago
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Index: srtp/crypto/cipher/aes_icm_ossl.c
diff --git a/srtp/crypto/cipher/aes_icm_ossl.c b/srtp/crypto/cipher/aes_icm_ossl.c
deleted file mode 100644
index eb5853912c6cde6a52a1a6b504b310affb96f5c0..0000000000000000000000000000000000000000
--- a/srtp/crypto/cipher/aes_icm_ossl.c
+++ /dev/null
@@ -1,563 +0,0 @@
-/*
- * aes_icm_ossl.c
- *
- * AES Integer Counter Mode
- *
- * John A. Foley
- * Cisco Systems, Inc.
- *
- * 2/24/2012: This module was modified to use CiscoSSL for AES counter
- * mode. Eddy Lem contributed the code to allow this.
- *
- * 12/20/2012: Added support for AES-192 and AES-256.
- */
-
-/*
- *
- * Copyright (c) 2013, Cisco Systems, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * Neither the name of the Cisco Systems, Inc. nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifdef HAVE_CONFIG_H
- #include <config.h>
-#endif
-
-#include <openssl/evp.h>
-#include "aes_icm_ossl.h"
-#include "crypto_types.h"
-#include "alloc.h"
-#include "crypto_types.h"
-
-
-debug_module_t mod_aes_icm = {
- 0, /* debugging is off by default */
- "aes icm ossl" /* printable module name */
-};
-extern cipher_test_case_t aes_icm_test_case_0;
-extern cipher_type_t aes_icm;
-#ifndef SRTP_NO_AES192
-extern cipher_type_t aes_icm_192;
-#endif
-extern cipher_type_t aes_icm_256;
-
-/*
- * integer counter mode works as follows:
- *
- * 16 bits
- * <----->
- * +------+------+------+------+------+------+------+------+
- * | nonce | packet index | ctr |---+
- * +------+------+------+------+------+------+------+------+ |
- * |
- * +------+------+------+------+------+------+------+------+ v
- * | salt |000000|->(+)
- * +------+------+------+------+------+------+------+------+ |
- * |
- * +---------+
- * | encrypt |
- * +---------+
- * |
- * +------+------+------+------+------+------+------+------+ |
- * | keystream block |<--+
- * +------+------+------+------+------+------+------+------+
- *
- * All fields are big-endian
- *
- * ctr is the block counter, which increments from zero for
- * each packet (16 bits wide)
- *
- * packet index is distinct for each packet (48 bits wide)
- *
- * nonce can be distinct across many uses of the same key, or
- * can be a fixed value per key, or can be per-packet randomness
- * (64 bits)
- *
- */
-
-/*
- * This function allocates a new instance of this crypto engine.
- * The key_len parameter should be one of 30, 38, or 46 for
- * AES-128, AES-192, and AES-256 respectively. Note, this key_len
- * value is inflated, as it also accounts for the 112 bit salt
- * value. The tlen argument is for the AEAD tag length, which
- * isn't used in counter mode.
- */
-err_status_t aes_icm_openssl_alloc (cipher_t **c, int key_len, int tlen)
-{
- aes_icm_ctx_t *icm;
- int tmp;
- uint8_t *allptr;
-
- debug_print(mod_aes_icm, "allocating cipher with key length %d", key_len);
-
- /*
- * Verify the key_len is valid for one of: AES-128/192/256
- */
- if (key_len != AES_128_KEYSIZE_WSALT &&
-#ifndef SRTP_NO_AES192
- key_len != AES_192_KEYSIZE_WSALT &&
-#endif
- key_len != AES_256_KEYSIZE_WSALT) {
- return err_status_bad_param;
- }
-
- /* allocate memory a cipher of type aes_icm */
- tmp = sizeof(cipher_t) + sizeof(aes_icm_ctx_t);
- allptr = (uint8_t*)crypto_alloc(tmp);
- if (allptr == NULL) {
- return err_status_alloc_fail;
- }
-
- /* set pointers */
- *c = (cipher_t*)allptr;
- (*c)->state = allptr + sizeof(cipher_t);
- icm = (aes_icm_ctx_t*)(*c)->state;
-
- /* increment ref_count */
- switch (key_len) {
- case AES_128_KEYSIZE_WSALT:
- (*c)->algorithm = AES_128_ICM;
- (*c)->type = &aes_icm;
- aes_icm.ref_count++;
- ((aes_icm_ctx_t*)(*c)->state)->key_size = AES_128_KEYSIZE;
- break;
-#ifndef SRTP_NO_AES192
- case AES_192_KEYSIZE_WSALT:
- (*c)->algorithm = AES_192_ICM;
- (*c)->type = &aes_icm_192;
- aes_icm_192.ref_count++;
- ((aes_icm_ctx_t*)(*c)->state)->key_size = AES_192_KEYSIZE;
- break;
-#endif
- case AES_256_KEYSIZE_WSALT:
- (*c)->algorithm = AES_256_ICM;
- (*c)->type = &aes_icm_256;
- aes_icm_256.ref_count++;
- ((aes_icm_ctx_t*)(*c)->state)->key_size = AES_256_KEYSIZE;
- break;
- }
-
- /* set key size */
- (*c)->key_len = key_len;
- EVP_CIPHER_CTX_init(&icm->ctx);
-
- return err_status_ok;
-}
-
-
-/*
- * This function deallocates an instance of this engine
- */
-err_status_t aes_icm_openssl_dealloc (cipher_t *c)
-{
- aes_icm_ctx_t *ctx;
-
- if (c == NULL) {
- return err_status_bad_param;
- }
-
- /*
- * Free the EVP context
- */
- ctx = (aes_icm_ctx_t*)c->state;
- if (ctx != NULL) {
- EVP_CIPHER_CTX_cleanup(&ctx->ctx);
- /* decrement ref_count for the appropriate engine */
- switch (ctx->key_size) {
- case AES_256_KEYSIZE:
- aes_icm_256.ref_count--;
- break;
-#ifndef SRTP_NO_AES192
- case AES_192_KEYSIZE:
- aes_icm_192.ref_count--;
- break;
-#endif
- case AES_128_KEYSIZE:
- aes_icm.ref_count--;
- break;
- default:
- return err_status_dealloc_fail;
- break;
- }
- }
-
- /* zeroize entire state*/
- octet_string_set_to_zero((uint8_t*)c,
- sizeof(cipher_t) + sizeof(aes_icm_ctx_t));
-
- /* free memory */
- crypto_free(c);
-
- return err_status_ok;
-}
-
-/*
- * aes_icm_openssl_context_init(...) initializes the aes_icm_context
- * using the value in key[].
- *
- * the key is the secret key
- *
- * the salt is unpredictable (but not necessarily secret) data which
- * randomizes the starting point in the keystream
- */
-err_status_t aes_icm_openssl_context_init (aes_icm_ctx_t *c, const uint8_t *key, int len)
-{
- /*
- * set counter and initial values to 'offset' value, being careful not to
- * go past the end of the key buffer
- */
-
- if (c->key_size + SALT_SIZE != len)
- return err_status_bad_param;
-
- v128_set_to_zero(&c->counter);
- v128_set_to_zero(&c->offset);
- memcpy(&c->counter, key + c->key_size, SALT_SIZE);
- memcpy(&c->offset, key + c->key_size, SALT_SIZE);
-
- /* force last two octets of the offset to zero (for srtp compatibility) */
- c->offset.v8[SALT_SIZE] = c->offset.v8[SALT_SIZE + 1] = 0;
- c->counter.v8[SALT_SIZE] = c->counter.v8[SALT_SIZE + 1] = 0;
-
- /* copy key to be used later when CiscoSSL crypto context is created */
- v128_copy_octet_string((v128_t*)&c->key, key);
-
- /* if the key is greater than 16 bytes, copy the second
- * half. Note, we treat AES-192 and AES-256 the same here
- * for simplicity. The storage location receiving the
- * key is statically allocated to handle a full 32 byte key
- * regardless of the cipher in use.
- */
- if (c->key_size == AES_256_KEYSIZE
-#ifndef SRTP_NO_AES192
- || c->key_size == AES_192_KEYSIZE
-#endif
- ) {
- debug_print(mod_aes_icm, "Copying last 16 bytes of key: %s",
- v128_hex_string((v128_t*)(key + AES_128_KEYSIZE)));
- v128_copy_octet_string(((v128_t*)(&c->key.v8)) + 1, key + AES_128_KEYSIZE);
- }
-
- debug_print(mod_aes_icm, "key: %s", v128_hex_string((v128_t*)&c->key));
- debug_print(mod_aes_icm, "offset: %s", v128_hex_string(&c->offset));
-
- EVP_CIPHER_CTX_cleanup(&c->ctx);
-
- return err_status_ok;
-}
-
-
-/*
- * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with
- * the offset
- */
-err_status_t aes_icm_openssl_set_iv (aes_icm_ctx_t *c, void *iv, int dir)
-{
- const EVP_CIPHER *evp;
- v128_t nonce;
-
- /* set nonce (for alignment) */
- v128_copy_octet_string(&nonce, iv);
-
- debug_print(mod_aes_icm, "setting iv: %s", v128_hex_string(&nonce));
-
- v128_xor(&c->counter, &c->offset, &nonce);
-
- debug_print(mod_aes_icm, "set_counter: %s", v128_hex_string(&c->counter));
-
- switch (c->key_size) {
- case AES_256_KEYSIZE:
- evp = EVP_aes_256_ctr();
- break;
-#ifndef SRTP_NO_AES192
- case AES_192_KEYSIZE:
- evp = EVP_aes_192_ctr();
- break;
-#endif
- case AES_128_KEYSIZE:
- evp = EVP_aes_128_ctr();
- break;
- default:
- return err_status_bad_param;
- break;
- }
-
- if (!EVP_EncryptInit_ex(&c->ctx, evp,
- NULL, c->key.v8, c->counter.v8)) {
- return err_status_fail;
- } else {
- return err_status_ok;
- }
-}
-
-/*
- * This function encrypts a buffer using AES CTR mode
- *
- * Parameters:
- * c Crypto context
- * buf data to encrypt
- * enc_len length of encrypt buffer
- */
-err_status_t aes_icm_openssl_encrypt (aes_icm_ctx_t *c, unsigned char *buf, unsigned int *enc_len)
-{
- int len = 0;
-
- debug_print(mod_aes_icm, "rs0: %s", v128_hex_string(&c->counter));
-
- if (!EVP_EncryptUpdate(&c->ctx, buf, &len, buf, *enc_len)) {
- return err_status_cipher_fail;
- }
- *enc_len = len;
-
- if (!EVP_EncryptFinal_ex(&c->ctx, buf, &len)) {
- return err_status_cipher_fail;
- }
- *enc_len += len;
-
- return err_status_ok;
-}
-
-uint16_t aes_icm_bytes_encrypted(aes_icm_ctx_t *c)
-{
- return htons(c->counter.v16[7]);
-}
-
-/*
- * Name of this crypto engine
- */
-char aes_icm_openssl_description[] = "AES-128 counter mode using openssl";
-#ifndef SRTP_NO_AES192
-char aes_icm_192_openssl_description[] = "AES-192 counter mode using openssl";
-#endif
-char aes_icm_256_openssl_description[] = "AES-256 counter mode using openssl";
-
-
-/*
- * KAT values for AES self-test. These
- * values came from the legacy libsrtp code.
- */
-uint8_t aes_icm_test_case_0_key[AES_128_KEYSIZE_WSALT] = {
- 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6,
- 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c,
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
- 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd
-};
-
-uint8_t aes_icm_test_case_0_nonce[16] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-uint8_t aes_icm_test_case_0_plaintext[32] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-};
-
-uint8_t aes_icm_test_case_0_ciphertext[32] = {
- 0xe0, 0x3e, 0xad, 0x09, 0x35, 0xc9, 0x5e, 0x80,
- 0xe1, 0x66, 0xb1, 0x6d, 0xd9, 0x2b, 0x4e, 0xb4,
- 0xd2, 0x35, 0x13, 0x16, 0x2b, 0x02, 0xd0, 0xf7,
- 0x2a, 0x43, 0xa2, 0xfe, 0x4a, 0x5f, 0x97, 0xab
-};
-
-cipher_test_case_t aes_icm_test_case_0 = {
- AES_128_KEYSIZE_WSALT, /* octets in key */
- aes_icm_test_case_0_key, /* key */
- aes_icm_test_case_0_nonce, /* packet index */
- 32, /* octets in plaintext */
- aes_icm_test_case_0_plaintext, /* plaintext */
- 32, /* octets in ciphertext */
- aes_icm_test_case_0_ciphertext, /* ciphertext */
- 0,
- NULL,
- 0,
- NULL /* pointer to next testcase */
-};
-
-#ifndef SRTP_NO_AES192
-/*
- * KAT values for AES-192-CTR self-test. These
- * values came from section 7 of RFC 6188.
- */
-uint8_t aes_icm_192_test_case_1_key[AES_192_KEYSIZE_WSALT] = {
- 0xea, 0xb2, 0x34, 0x76, 0x4e, 0x51, 0x7b, 0x2d,
- 0x3d, 0x16, 0x0d, 0x58, 0x7d, 0x8c, 0x86, 0x21,
- 0x97, 0x40, 0xf6, 0x5f, 0x99, 0xb6, 0xbc, 0xf7,
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
- 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd
-};
-
-uint8_t aes_icm_192_test_case_1_nonce[16] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-uint8_t aes_icm_192_test_case_1_plaintext[32] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-};
-
-uint8_t aes_icm_192_test_case_1_ciphertext[32] = {
- 0x35, 0x09, 0x6c, 0xba, 0x46, 0x10, 0x02, 0x8d,
- 0xc1, 0xb5, 0x75, 0x03, 0x80, 0x4c, 0xe3, 0x7c,
- 0x5d, 0xe9, 0x86, 0x29, 0x1d, 0xcc, 0xe1, 0x61,
- 0xd5, 0x16, 0x5e, 0xc4, 0x56, 0x8f, 0x5c, 0x9a
-};
-
-cipher_test_case_t aes_icm_192_test_case_1 = {
- AES_192_KEYSIZE_WSALT, /* octets in key */
- aes_icm_192_test_case_1_key, /* key */
- aes_icm_192_test_case_1_nonce, /* packet index */
- 32, /* octets in plaintext */
- aes_icm_192_test_case_1_plaintext, /* plaintext */
- 32, /* octets in ciphertext */
- aes_icm_192_test_case_1_ciphertext, /* ciphertext */
- 0,
- NULL,
- 0,
- NULL /* pointer to next testcase */
-};
-#endif
-
-/*
- * KAT values for AES-256-CTR self-test. These
- * values came from section 7 of RFC 6188.
- */
-uint8_t aes_icm_256_test_case_2_key[AES_256_KEYSIZE_WSALT] = {
- 0x57, 0xf8, 0x2f, 0xe3, 0x61, 0x3f, 0xd1, 0x70,
- 0xa8, 0x5e, 0xc9, 0x3c, 0x40, 0xb1, 0xf0, 0x92,
- 0x2e, 0xc4, 0xcb, 0x0d, 0xc0, 0x25, 0xb5, 0x82,
- 0x72, 0x14, 0x7c, 0xc4, 0x38, 0x94, 0x4a, 0x98,
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
- 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd
-};
-
-uint8_t aes_icm_256_test_case_2_nonce[16] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-uint8_t aes_icm_256_test_case_2_plaintext[32] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-};
-
-uint8_t aes_icm_256_test_case_2_ciphertext[32] = {
- 0x92, 0xbd, 0xd2, 0x8a, 0x93, 0xc3, 0xf5, 0x25,
- 0x11, 0xc6, 0x77, 0xd0, 0x8b, 0x55, 0x15, 0xa4,
- 0x9d, 0xa7, 0x1b, 0x23, 0x78, 0xa8, 0x54, 0xf6,
- 0x70, 0x50, 0x75, 0x6d, 0xed, 0x16, 0x5b, 0xac
-};
-
-cipher_test_case_t aes_icm_256_test_case_2 = {
- AES_256_KEYSIZE_WSALT, /* octets in key */
- aes_icm_256_test_case_2_key, /* key */
- aes_icm_256_test_case_2_nonce, /* packet index */
- 32, /* octets in plaintext */
- aes_icm_256_test_case_2_plaintext, /* plaintext */
- 32, /* octets in ciphertext */
- aes_icm_256_test_case_2_ciphertext, /* ciphertext */
- 0,
- NULL,
- 0,
- NULL /* pointer to next testcase */
-};
-
-/*
- * This is the function table for this crypto engine.
- * note: the encrypt function is identical to the decrypt function
- */
-cipher_type_t aes_icm = {
- (cipher_alloc_func_t) aes_icm_openssl_alloc,
- (cipher_dealloc_func_t) aes_icm_openssl_dealloc,
- (cipher_init_func_t) aes_icm_openssl_context_init,
- (cipher_set_aad_func_t) 0,
- (cipher_encrypt_func_t) aes_icm_openssl_encrypt,
- (cipher_decrypt_func_t) aes_icm_openssl_encrypt,
- (cipher_set_iv_func_t) aes_icm_openssl_set_iv,
- (cipher_get_tag_func_t) 0,
- (char*) aes_icm_openssl_description,
- (int) 0, /* instance count */
- (cipher_test_case_t*) &aes_icm_test_case_0,
- (debug_module_t*) &mod_aes_icm,
- (cipher_type_id_t) AES_ICM
-};
-
-#ifndef SRTP_NO_AES192
-/*
- * This is the function table for this crypto engine.
- * note: the encrypt function is identical to the decrypt function
- */
-cipher_type_t aes_icm_192 = {
- (cipher_alloc_func_t) aes_icm_openssl_alloc,
- (cipher_dealloc_func_t) aes_icm_openssl_dealloc,
- (cipher_init_func_t) aes_icm_openssl_context_init,
- (cipher_set_aad_func_t) 0,
- (cipher_encrypt_func_t) aes_icm_openssl_encrypt,
- (cipher_decrypt_func_t) aes_icm_openssl_encrypt,
- (cipher_set_iv_func_t) aes_icm_openssl_set_iv,
- (cipher_get_tag_func_t) 0,
- (char*) aes_icm_192_openssl_description,
- (int) 0, /* instance count */
- (cipher_test_case_t*) &aes_icm_192_test_case_1,
- (debug_module_t*) &mod_aes_icm,
- (cipher_type_id_t) AES_192_ICM
-};
-#endif
-
-/*
- * This is the function table for this crypto engine.
- * note: the encrypt function is identical to the decrypt function
- */
-cipher_type_t aes_icm_256 = {
- (cipher_alloc_func_t) aes_icm_openssl_alloc,
- (cipher_dealloc_func_t) aes_icm_openssl_dealloc,
- (cipher_init_func_t) aes_icm_openssl_context_init,
- (cipher_set_aad_func_t) 0,
- (cipher_encrypt_func_t) aes_icm_openssl_encrypt,
- (cipher_decrypt_func_t) aes_icm_openssl_encrypt,
- (cipher_set_iv_func_t) aes_icm_openssl_set_iv,
- (cipher_get_tag_func_t) 0,
- (char*) aes_icm_256_openssl_description,
- (int) 0, /* instance count */
- (cipher_test_case_t*) &aes_icm_256_test_case_2,
- (debug_module_t*) &mod_aes_icm,
- (cipher_type_id_t) AES_256_ICM
-};
-
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