183 lines
6.9 KiB
C
183 lines
6.9 KiB
C
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// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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#ifndef OPENSSL_HEADER_CIPHER_INTERNAL_H
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#define OPENSSL_HEADER_CIPHER_INTERNAL_H
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#include <openssl/base.h>
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#include <openssl/aead.h>
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#include <openssl/aes.h>
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#include <openssl/bytestring.h>
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#include "../../internal.h"
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#include "../modes/internal.h"
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#if defined(__cplusplus)
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extern "C" {
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#endif
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// EVP_CIPH_MODE_MASK contains the bits of |flags| that represent the mode.
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#define EVP_CIPH_MODE_MASK 0x3f
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// Set of EVP_AEAD->aead_id identifiers, zero is reserved as the "unknown"
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// value since it is the default for a structure. Implementations of the same
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// algorithms should use the same identifier. For example, machine-optimised
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// assembly versions should use the same identifier as their C counterparts.
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#define AEAD_UNKNOWN_ID 0
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#define AEAD_AES_128_CTR_HMAC_SHA256_ID 1
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#define AEAD_AES_256_CTR_HMAC_SHA256_ID 2
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#define AEAD_AES_128_GCM_SIV_ID 3
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#define AEAD_AES_256_GCM_SIV_ID 4
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#define AEAD_CHACHA20_POLY1305_ID 5
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#define AEAD_XCHACHA20_POLY1305_ID 6
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#define AEAD_AES_128_CBC_SHA1_TLS_ID 7
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#define AEAD_AES_128_CBC_SHA1_TLS_IMPLICIT_IV_ID 8
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#define AEAD_AES_256_CBC_SHA1_TLS_ID 9
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#define AEAD_AES_256_CBC_SHA1_TLS_IMPLICIT_IV_ID 10
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#define AEAD_AES_128_CBC_SHA256_TLS_ID 11
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#define AEAD_AES_128_CBC_SHA256_TLS_IMPLICIT_IV_ID 12
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#define AEAD_DES_EDE3_CBC_SHA1_TLS_ID 13
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#define AEAD_DES_EDE3_CBC_SHA1_TLS_IMPLICIT_IV_ID 14
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#define AEAD_NULL_SHA1_TLS_ID 15
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#define AEAD_AES_128_GCM_ID 16
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#define AEAD_AES_192_GCM_ID 17
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#define AEAD_AES_256_GCM_ID 18
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#define AEAD_AES_128_GCM_RANDNONCE_ID 19
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#define AEAD_AES_256_GCM_RANDNONCE_ID 20
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#define AEAD_AES_128_GCM_TLS12_ID 21
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#define AEAD_AES_256_GCM_TLS12_ID 22
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#define AEAD_AES_128_GCM_TLS13_ID 23
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#define AEAD_AES_256_GCM_TLS13_ID 24
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#define AEAD_AES_128_CCM_BLUETOOTH_ID 25
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#define AEAD_AES_128_CCM_BLUETOOTH_8_ID 26
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#define AEAD_AES_128_CCM_MATTER_ID 27
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#define AEAD_AES_256_CBC_SHA384_TLS_ID 28
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#define AEAD_MAX_ID 28
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// EVP_AEAD represents a specific AEAD algorithm.
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struct evp_aead_st {
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uint8_t key_len;
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uint8_t nonce_len;
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uint8_t overhead;
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uint8_t max_tag_len;
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uint16_t aead_id;
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int seal_scatter_supports_extra_in;
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// init initialises an |EVP_AEAD_CTX|. If this call returns zero then
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// |cleanup| will not be called for that context.
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int (*init)(EVP_AEAD_CTX *, const uint8_t *key, size_t key_len,
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size_t tag_len);
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int (*init_with_direction)(EVP_AEAD_CTX *, const uint8_t *key, size_t key_len,
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size_t tag_len, enum evp_aead_direction_t dir);
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void (*cleanup)(EVP_AEAD_CTX *);
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int (*open)(const EVP_AEAD_CTX *ctx, uint8_t *out, size_t *out_len,
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size_t max_out_len, const uint8_t *nonce, size_t nonce_len,
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const uint8_t *in, size_t in_len, const uint8_t *ad,
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size_t ad_len);
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int (*seal_scatter)(const EVP_AEAD_CTX *ctx, uint8_t *out, uint8_t *out_tag,
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size_t *out_tag_len, size_t max_out_tag_len,
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const uint8_t *nonce, size_t nonce_len, const uint8_t *in,
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size_t in_len, const uint8_t *extra_in,
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size_t extra_in_len, const uint8_t *ad, size_t ad_len);
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int (*open_gather)(const EVP_AEAD_CTX *ctx, uint8_t *out,
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const uint8_t *nonce, size_t nonce_len, const uint8_t *in,
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size_t in_len, const uint8_t *in_tag, size_t in_tag_len,
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const uint8_t *ad, size_t ad_len);
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int (*get_iv)(const EVP_AEAD_CTX *ctx, const uint8_t **out_iv,
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size_t *out_len);
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size_t (*tag_len)(const EVP_AEAD_CTX *ctx, size_t in_Len,
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size_t extra_in_len);
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int (*serialize_state)(const EVP_AEAD_CTX *ctx, CBB *cbb);
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int (*deserialize_state)(const EVP_AEAD_CTX *ctx, CBS *cbs);
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};
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struct evp_cipher_st {
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// type contains a NID identifying the cipher. (e.g. NID_aes_128_gcm.)
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int nid;
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// block_size contains the block size, in bytes, of the cipher, or 1 for a
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// stream cipher.
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unsigned block_size;
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// key_len contains the key size, in bytes, for the cipher. If the cipher
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// takes a variable key size then this contains the default size.
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unsigned key_len;
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// iv_len contains the IV size, in bytes, or zero if inapplicable.
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unsigned iv_len;
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// ctx_size contains the size, in bytes, of the per-key context for this
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// cipher.
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unsigned ctx_size;
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// flags contains the OR of a number of flags. See |EVP_CIPH_*|.
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uint32_t flags;
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int (*init)(EVP_CIPHER_CTX *ctx, const uint8_t *key, const uint8_t *iv,
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int enc);
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int (*cipher)(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
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size_t inl);
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// cleanup, if non-NULL, releases memory associated with the context. It is
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// called if |EVP_CTRL_INIT| succeeds. Note that |init| may not have been
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// called at this point.
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void (*cleanup)(EVP_CIPHER_CTX *);
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int (*ctrl)(EVP_CIPHER_CTX *, int type, int arg, void *ptr);
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};
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// aes_ctr_set_key initialises |*aes_key| using |key_bytes| bytes from |key|,
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// where |key_bytes| must either be 16, 24 or 32. If not NULL, |*out_block| is
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// set to a function that encrypts single blocks. If not NULL, |*gcm_key| is
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// initialised to do GHASH with the given key. It returns a function for
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// optimised CTR-mode, or NULL if CTR-mode should be built using |*out_block|.
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ctr128_f aes_ctr_set_key(AES_KEY *aes_key, GCM128_KEY *gcm_key,
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block128_f *out_block, const uint8_t *key,
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size_t key_bytes);
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// EXPERIMENTAL functions for use in the TLS Transfer function. See
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// |SSL_to_bytes| for more details.
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// EVP_AEAD_CTX_serialize_state serializes the state of |ctx|,
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// and writes it to |cbb|. The serialized bytes contains only the subset of data
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// necessary to restore the state of an |EVP_AEAD_CTX| after initializing a new
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// instance using |EVP_AEAD_CTX_init|. Function returns 1 on success or zero for
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// an error.
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//
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// EvpAeadCtxStateSerializationVersion ::= INTEGER {v1 (1)}
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//
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// EvpAeadCtxState ::= SEQUENCE {
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// serializationVersion EvpAeadCtxStateSerializationVersion,
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// evpAeadCipherIdentifier INTEGER,
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// state OCTET STRING
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// }
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OPENSSL_EXPORT int EVP_AEAD_CTX_serialize_state(const EVP_AEAD_CTX *ctx,
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CBB *cbb);
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// EVP_AEAD_CTX_deserialize_state deserializes the state
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// contained in |cbs|, configures the |ctx| to match. The deserialized bytes
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// contains only the subset of data necessary to restore the state of an
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// |EVP_AEAD_CTX| after initializing a new instance using |EVP_AEAD_CTX_init|.
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// The function returns 1 on success or zero for an error.
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OPENSSL_EXPORT int EVP_AEAD_CTX_deserialize_state(const EVP_AEAD_CTX *ctx,
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CBS *cbs);
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OPENSSL_EXPORT uint16_t EVP_AEAD_CTX_get_aead_id(const EVP_AEAD_CTX *ctx);
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#if defined(__cplusplus)
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} // extern C
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#endif
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#endif // OPENSSL_HEADER_CIPHER_INTERNAL_H
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