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  1. /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  2. * All rights reserved.
  3. *
  4. * This package is an SSL implementation written
  5. * by Eric Young (eay@cryptsoft.com).
  6. * The implementation was written so as to conform with Netscapes SSL.
  7. *
  8. * This library is free for commercial and non-commercial use as long as
  9. * the following conditions are aheared to. The following conditions
  10. * apply to all code found in this distribution, be it the RC4, RSA,
  11. * lhash, DES, etc., code; not just the SSL code. The SSL documentation
  12. * included with this distribution is covered by the same copyright terms
  13. * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14. *
  15. * Copyright remains Eric Young's, and as such any Copyright notices in
  16. * the code are not to be removed.
  17. * If this package is used in a product, Eric Young should be given attribution
  18. * as the author of the parts of the library used.
  19. * This can be in the form of a textual message at program startup or
  20. * in documentation (online or textual) provided with the package.
  21. *
  22. * Redistribution and use in source and binary forms, with or without
  23. * modification, are permitted provided that the following conditions
  24. * are met:
  25. * 1. Redistributions of source code must retain the copyright
  26. * notice, this list of conditions and the following disclaimer.
  27. * 2. Redistributions in binary form must reproduce the above copyright
  28. * notice, this list of conditions and the following disclaimer in the
  29. * documentation and/or other materials provided with the distribution.
  30. * 3. All advertising materials mentioning features or use of this software
  31. * must display the following acknowledgement:
  32. * "This product includes cryptographic software written by
  33. * Eric Young (eay@cryptsoft.com)"
  34. * The word 'cryptographic' can be left out if the rouines from the library
  35. * being used are not cryptographic related :-).
  36. * 4. If you include any Windows specific code (or a derivative thereof) from
  37. * the apps directory (application code) you must include an acknowledgement:
  38. * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39. *
  40. * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43. * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50. * SUCH DAMAGE.
  51. *
  52. * The licence and distribution terms for any publically available version or
  53. * derivative of this code cannot be changed. i.e. this code cannot simply be
  54. * copied and put under another distribution licence
  55. * [including the GNU Public Licence.] */
  56. #ifndef OPENSSL_HEADER_CIPHER_H
  57. #define OPENSSL_HEADER_CIPHER_H
  58. #include <openssl/base.h>
  59. #if defined(__cplusplus)
  60. extern "C" {
  61. #endif
  62. /* Ciphers. */
  63. /* Cipher primitives.
  64. *
  65. * The following functions return |EVP_CIPHER| objects that implement the named
  66. * cipher algorithm. */
  67. OPENSSL_EXPORT const EVP_CIPHER *EVP_rc4(void);
  68. OPENSSL_EXPORT const EVP_CIPHER *EVP_des_cbc(void);
  69. OPENSSL_EXPORT const EVP_CIPHER *EVP_des_ede3_cbc(void);
  70. OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_ecb(void);
  71. OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_cbc(void);
  72. OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_ctr(void);
  73. OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_gcm(void);
  74. OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_ecb(void);
  75. OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_cbc(void);
  76. OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_ctr(void);
  77. OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_gcm(void);
  78. /* EVP_enc_null returns a 'cipher' that passes plaintext through as
  79. * ciphertext. */
  80. OPENSSL_EXPORT const EVP_CIPHER *EVP_enc_null(void);
  81. /* EVP_rc2_40_cbc returns a cipher that implements 40-bit RC2 in CBC mode. This
  82. * is obviously very, very weak and is included only in order to read PKCS#12
  83. * files, which often encrypt the certificate chain using this cipher. It is
  84. * deliberately not exported. */
  85. const EVP_CIPHER *EVP_rc2_40_cbc(void);
  86. /* EVP_get_cipherbynid returns the cipher corresponding to the given NID, or
  87. * NULL if no such cipher is known. */
  88. OPENSSL_EXPORT const EVP_CIPHER *EVP_get_cipherbynid(int nid);
  89. /* Cipher context allocation.
  90. *
  91. * An |EVP_CIPHER_CTX| represents the state of an encryption or decryption in
  92. * progress. */
  93. /* EVP_CIPHER_CTX_init initialises an, already allocated, |EVP_CIPHER_CTX|. */
  94. OPENSSL_EXPORT void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx);
  95. /* EVP_CIPHER_CTX_new allocates a fresh |EVP_CIPHER_CTX|, calls
  96. * |EVP_CIPHER_CTX_init| and returns it, or NULL on allocation failure. */
  97. OPENSSL_EXPORT EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void);
  98. /* EVP_CIPHER_CTX_cleanup frees any memory referenced by |ctx|. It returns one
  99. * on success and zero otherwise. */
  100. OPENSSL_EXPORT int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *ctx);
  101. /* EVP_CIPHER_CTX_free calls |EVP_CIPHER_CTX_cleanup| on |ctx| and then frees
  102. * |ctx| itself. */
  103. OPENSSL_EXPORT void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx);
  104. /* EVP_CIPHER_CTX_copy sets |out| to be a duplicate of the current state of
  105. * |in|. The |out| argument must have been previously initialised. */
  106. OPENSSL_EXPORT int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out,
  107. const EVP_CIPHER_CTX *in);
  108. /* Cipher context configuration. */
  109. /* EVP_CipherInit_ex configures |ctx| for a fresh encryption (or decryption, if
  110. * |enc| is zero) operation using |cipher|. If |ctx| has been previously
  111. * configured with a cipher then |cipher|, |key| and |iv| may be |NULL| and
  112. * |enc| may be -1 to reuse the previous values. The operation will use |key|
  113. * as the key and |iv| as the IV (if any). These should have the correct
  114. * lengths given by |EVP_CIPHER_key_length| and |EVP_CIPHER_iv_length|. It
  115. * returns one on success and zero on error. */
  116. OPENSSL_EXPORT int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx,
  117. const EVP_CIPHER *cipher, ENGINE *engine,
  118. const uint8_t *key, const uint8_t *iv,
  119. int enc);
  120. /* EVP_EncryptInit_ex calls |EVP_CipherInit_ex| with |enc| equal to one. */
  121. OPENSSL_EXPORT int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,
  122. const EVP_CIPHER *cipher, ENGINE *impl,
  123. const uint8_t *key, const uint8_t *iv);
  124. /* EVP_DecryptInit_ex calls |EVP_CipherInit_ex| with |enc| equal to zero. */
  125. OPENSSL_EXPORT int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx,
  126. const EVP_CIPHER *cipher, ENGINE *impl,
  127. const uint8_t *key, const uint8_t *iv);
  128. /* Cipher operations. */
  129. /* EVP_EncryptUpdate encrypts |in_len| bytes from |in| to |out|. The number
  130. * of output bytes may be up to |in_len| plus the block length minus one and
  131. * |out| must have sufficient space. The number of bytes actually output is
  132. * written to |*out_len|. It returns one on success and zero otherwise. */
  133. OPENSSL_EXPORT int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out,
  134. int *out_len, const uint8_t *in,
  135. int in_len);
  136. /* EVP_EncryptFinal_ex writes at most a block of ciphertext to |out| and sets
  137. * |*out_len| to the number of bytes written. If padding is enabled (the
  138. * default) then standard padding is applied to create the final block. If
  139. * padding is disabled (with |EVP_CIPHER_CTX_set_padding|) then any partial
  140. * block remaining will cause an error. The function returns one on success and
  141. * zero otherwise. */
  142. OPENSSL_EXPORT int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, uint8_t *out,
  143. int *out_len);
  144. /* EVP_DecryptUpdate decrypts |in_len| bytes from |in| to |out|. The number of
  145. * output bytes may be up to |in_len| plus the block length minus one and |out|
  146. * must have sufficient space. The number of bytes actually output is written
  147. * to |*out_len|. It returns one on success and zero otherwise. */
  148. OPENSSL_EXPORT int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out,
  149. int *out_len, const uint8_t *in,
  150. int in_len);
  151. /* EVP_DecryptFinal_ex writes at most a block of ciphertext to |out| and sets
  152. * |*out_len| to the number of bytes written. If padding is enabled (the
  153. * default) then padding is removed from the final block.
  154. *
  155. * WARNING: it is unsafe to call this function with unauthenticted
  156. * ciphertext if padding is enabled. */
  157. OPENSSL_EXPORT int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out,
  158. int *out_len);
  159. /* EVP_Cipher performs a one-shot encryption/decryption operation. No partial
  160. * blocks etc are maintained between calls. It returns the number of bytes
  161. * written or -1 on error.
  162. *
  163. * WARNING: this differs from the usual return value convention. */
  164. OPENSSL_EXPORT int EVP_Cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
  165. const uint8_t *in, size_t in_len);
  166. /* EVP_CipherUpdate calls either |EVP_EncryptUpdate| or |EVP_DecryptUpdate|
  167. * depending on how |ctx| has been setup. */
  168. OPENSSL_EXPORT int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out,
  169. int *out_len, const uint8_t *in,
  170. int in_len);
  171. /* EVP_CipherFinal_ex calls either |EVP_EncryptFinal_ex| or
  172. * |EVP_DecryptFinal_ex| depending on how |ctx| has been setup. */
  173. OPENSSL_EXPORT int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, uint8_t *out,
  174. int *out_len);
  175. /* Cipher context accessors. */
  176. /* EVP_CIPHER_CTX_cipher returns the |EVP_CIPHER| underlying |ctx|, or NULL if
  177. * none has been set. */
  178. OPENSSL_EXPORT const EVP_CIPHER *EVP_CIPHER_CTX_cipher(
  179. const EVP_CIPHER_CTX *ctx);
  180. /* EVP_CIPHER_CTX_nid returns a NID identifying the |EVP_CIPHER| underlying
  181. * |ctx| (e.g. |NID_rc4|). It will crash if no cipher has been configured. */
  182. OPENSSL_EXPORT int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx);
  183. /* EVP_CIPHER_CTX_block_size returns the block size, in bytes, of the cipher
  184. * underlying |ctx|, or one if the cipher is a stream cipher. It will crash if
  185. * no cipher has been configured. */
  186. OPENSSL_EXPORT unsigned EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx);
  187. /* EVP_CIPHER_CTX_key_length returns the key size, in bytes, of the cipher
  188. * underlying |ctx| or zero if no cipher has been configured. */
  189. OPENSSL_EXPORT unsigned EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx);
  190. /* EVP_CIPHER_CTX_iv_length returns the IV size, in bytes, of the cipher
  191. * underlying |ctx|. It will crash if no cipher has been configured. */
  192. OPENSSL_EXPORT unsigned EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx);
  193. /* EVP_CIPHER_CTX_get_app_data returns the opaque, application data pointer for
  194. * |ctx|, or NULL if none has been set. */
  195. OPENSSL_EXPORT void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx);
  196. /* EVP_CIPHER_CTX_set_app_data sets the opaque, application data pointer for
  197. * |ctx| to |data|. */
  198. OPENSSL_EXPORT void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx,
  199. void *data);
  200. /* EVP_CIPHER_CTX_flags returns a value which is the OR of zero or more
  201. * |EVP_CIPH_*| flags. It will crash if no cipher has been configured. */
  202. OPENSSL_EXPORT uint32_t EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx);
  203. /* EVP_CIPHER_CTX_mode returns one of the |EVP_CIPH_*| cipher mode values
  204. * enumerated below. It will crash if no cipher has been configured. */
  205. OPENSSL_EXPORT uint32_t EVP_CIPHER_CTX_mode(const EVP_CIPHER_CTX *ctx);
  206. /* EVP_CIPHER_CTX_ctrl is an |ioctl| like function. The |command| argument
  207. * should be one of the |EVP_CTRL_*| values. The |arg| and |ptr| arguments are
  208. * specific to the command in question. */
  209. OPENSSL_EXPORT int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int command,
  210. int arg, void *ptr);
  211. /* EVP_CIPHER_CTX_set_padding sets whether padding is enabled for |ctx| and
  212. * returns one. Pass a non-zero |pad| to enable padding (the default) or zero
  213. * to disable. */
  214. OPENSSL_EXPORT int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad);
  215. /* EVP_CIPHER_CTX_set_key_length sets the key length for |ctx|. This is only
  216. * valid for ciphers that can take a variable length key. It returns one on
  217. * success and zero on error. */
  218. OPENSSL_EXPORT int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *ctx, unsigned key_len);
  219. /* Cipher accessors. */
  220. /* EVP_CIPHER_nid returns a NID identifing |cipher|. (For example,
  221. * |NID_rc4|.) */
  222. OPENSSL_EXPORT int EVP_CIPHER_nid(const EVP_CIPHER *cipher);
  223. /* EVP_CIPHER_name returns the short name for |cipher| or NULL if no name is
  224. * known. */
  225. OPENSSL_EXPORT const char *EVP_CIPHER_name(const EVP_CIPHER *cipher);
  226. /* EVP_CIPHER_block_size returns the block size, in bytes, for |cipher|, or one
  227. * if |cipher| is a stream cipher. */
  228. OPENSSL_EXPORT unsigned EVP_CIPHER_block_size(const EVP_CIPHER *cipher);
  229. /* EVP_CIPHER_key_length returns the key size, in bytes, for |cipher|. If
  230. * |cipher| can take a variable key length then this function returns the
  231. * default key length and |EVP_CIPHER_flags| will return a value with
  232. * |EVP_CIPH_VARIABLE_LENGTH| set. */
  233. OPENSSL_EXPORT unsigned EVP_CIPHER_key_length(const EVP_CIPHER *cipher);
  234. /* EVP_CIPHER_iv_length returns the IV size, in bytes, of |cipher|, or zero if
  235. * |cipher| doesn't take an IV. */
  236. OPENSSL_EXPORT unsigned EVP_CIPHER_iv_length(const EVP_CIPHER *cipher);
  237. /* EVP_CIPHER_flags returns a value which is the OR of zero or more
  238. * |EVP_CIPH_*| flags. */
  239. OPENSSL_EXPORT uint32_t EVP_CIPHER_flags(const EVP_CIPHER *cipher);
  240. /* EVP_CIPHER_mode returns one of the cipher mode values enumerated below. */
  241. OPENSSL_EXPORT uint32_t EVP_CIPHER_mode(const EVP_CIPHER *cipher);
  242. /* Key derivation. */
  243. /* EVP_BytesToKey generates a key and IV for the cipher |type| by iterating
  244. * |md| |count| times using |data| and |salt|. On entry, the |key| and |iv|
  245. * buffers must have enough space to hold a key and IV for |type|. It returns
  246. * the length of the key on success or zero on error. */
  247. OPENSSL_EXPORT int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
  248. const uint8_t *salt, const uint8_t *data,
  249. size_t data_len, unsigned count, uint8_t *key,
  250. uint8_t *iv);
  251. /* Cipher modes (for |EVP_CIPHER_mode|). */
  252. #define EVP_CIPH_STREAM_CIPHER 0x0
  253. #define EVP_CIPH_ECB_MODE 0x1
  254. #define EVP_CIPH_CBC_MODE 0x2
  255. #define EVP_CIPH_CFB_MODE 0x3
  256. #define EVP_CIPH_OFB_MODE 0x4
  257. #define EVP_CIPH_CTR_MODE 0x5
  258. #define EVP_CIPH_GCM_MODE 0x6
  259. /* Cipher flags (for |EVP_CIPHER_flags|). */
  260. /* EVP_CIPH_VARIABLE_LENGTH indicates that the cipher takes a variable length
  261. * key. */
  262. #define EVP_CIPH_VARIABLE_LENGTH 0x40
  263. /* EVP_CIPH_ALWAYS_CALL_INIT indicates that the |init| function for the cipher
  264. * should always be called when initialising a new operation, even if the key
  265. * is NULL to indicate that the same key is being used. */
  266. #define EVP_CIPH_ALWAYS_CALL_INIT 0x80
  267. /* EVP_CIPH_CUSTOM_IV indicates that the cipher manages the IV itself rather
  268. * than keeping it in the |iv| member of |EVP_CIPHER_CTX|. */
  269. #define EVP_CIPH_CUSTOM_IV 0x100
  270. /* EVP_CIPH_CTRL_INIT indicates that EVP_CTRL_INIT should be used when
  271. * initialising an |EVP_CIPHER_CTX|. */
  272. #define EVP_CIPH_CTRL_INIT 0x200
  273. /* EVP_CIPH_FLAG_CUSTOM_CIPHER indicates that the cipher manages blocking
  274. * itself. This causes EVP_(En|De)crypt_ex to be simple wrapper functions. */
  275. #define EVP_CIPH_FLAG_CUSTOM_CIPHER 0x400
  276. /* EVP_CIPH_FLAG_AEAD_CIPHER specifies that the cipher is an AEAD. This is an
  277. * older version of the proper AEAD interface. See aead.h for the current
  278. * one. */
  279. #define EVP_CIPH_FLAG_AEAD_CIPHER 0x800
  280. /* EVP_CIPH_CUSTOM_COPY indicates that the |ctrl| callback should be called
  281. * with |EVP_CTRL_COPY| at the end of normal |EVP_CIPHER_CTX_copy|
  282. * processing. */
  283. #define EVP_CIPH_CUSTOM_COPY 0x1000
  284. /* Deprecated functions */
  285. /* EVP_CipherInit acts like EVP_CipherInit_ex except that |EVP_CIPHER_CTX_init|
  286. * is called on |cipher| first, if |cipher| is not NULL. */
  287. OPENSSL_EXPORT int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
  288. const uint8_t *key, const uint8_t *iv,
  289. int enc);
  290. /* EVP_EncryptInit calls |EVP_CipherInit| with |enc| equal to one. */
  291. OPENSSL_EXPORT int EVP_EncryptInit(EVP_CIPHER_CTX *ctx,
  292. const EVP_CIPHER *cipher, const uint8_t *key,
  293. const uint8_t *iv);
  294. /* EVP_DecryptInit calls |EVP_CipherInit| with |enc| equal to zero. */
  295. OPENSSL_EXPORT int EVP_DecryptInit(EVP_CIPHER_CTX *ctx,
  296. const EVP_CIPHER *cipher, const uint8_t *key,
  297. const uint8_t *iv);
  298. /* EVP_add_cipher_alias does nothing and returns one. */
  299. OPENSSL_EXPORT int EVP_add_cipher_alias(const char *a, const char *b);
  300. /* EVP_get_cipherbyname returns an |EVP_CIPHER| given a human readable name in
  301. * |name|, or NULL if the name is unknown. */
  302. OPENSSL_EXPORT const EVP_CIPHER *EVP_get_cipherbyname(const char *name);
  303. /* Private functions. */
  304. /* EVP_CIPH_NO_PADDING disables padding in block ciphers. */
  305. #define EVP_CIPH_NO_PADDING 0x800
  306. /* EVP_CIPHER_CTX_ctrl commands. */
  307. #define EVP_CTRL_INIT 0x0
  308. #define EVP_CTRL_SET_KEY_LENGTH 0x1
  309. #define EVP_CTRL_GET_RC2_KEY_BITS 0x2
  310. #define EVP_CTRL_SET_RC2_KEY_BITS 0x3
  311. #define EVP_CTRL_GET_RC5_ROUNDS 0x4
  312. #define EVP_CTRL_SET_RC5_ROUNDS 0x5
  313. #define EVP_CTRL_RAND_KEY 0x6
  314. #define EVP_CTRL_PBE_PRF_NID 0x7
  315. #define EVP_CTRL_COPY 0x8
  316. #define EVP_CTRL_GCM_SET_IVLEN 0x9
  317. #define EVP_CTRL_GCM_GET_TAG 0x10
  318. #define EVP_CTRL_GCM_SET_TAG 0x11
  319. #define EVP_CTRL_GCM_SET_IV_FIXED 0x12
  320. #define EVP_CTRL_GCM_IV_GEN 0x13
  321. #define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
  322. /* Set the GCM invocation field, decrypt only */
  323. #define EVP_CTRL_GCM_SET_IV_INV 0x18
  324. /* GCM TLS constants */
  325. /* Length of fixed part of IV derived from PRF */
  326. #define EVP_GCM_TLS_FIXED_IV_LEN 4
  327. /* Length of explicit part of IV part of TLS records */
  328. #define EVP_GCM_TLS_EXPLICIT_IV_LEN 8
  329. /* Length of tag for TLS */
  330. #define EVP_GCM_TLS_TAG_LEN 16
  331. #define EVP_MAX_KEY_LENGTH 64
  332. #define EVP_MAX_IV_LENGTH 16
  333. #define EVP_MAX_BLOCK_LENGTH 32
  334. struct evp_cipher_ctx_st {
  335. /* cipher contains the underlying cipher for this context. */
  336. const EVP_CIPHER *cipher;
  337. /* app_data is a pointer to opaque, user data. */
  338. void *app_data; /* application stuff */
  339. /* cipher_data points to the |cipher| specific state. */
  340. void *cipher_data;
  341. /* key_len contains the length of the key, which may differ from
  342. * |cipher->key_len| if the cipher can take a variable key length. */
  343. unsigned key_len;
  344. /* encrypt is one if encrypting and zero if decrypting. */
  345. int encrypt;
  346. /* flags contains the OR of zero or more |EVP_CIPH_*| flags, above. */
  347. uint32_t flags;
  348. /* oiv contains the original IV value. */
  349. uint8_t oiv[EVP_MAX_IV_LENGTH];
  350. /* iv contains the current IV value, which may have been updated. */
  351. uint8_t iv[EVP_MAX_IV_LENGTH];
  352. /* buf contains a partial block which is used by, for example, CTR mode to
  353. * store unused keystream bytes. */
  354. uint8_t buf[EVP_MAX_BLOCK_LENGTH];
  355. /* buf_len contains the number of bytes of a partial block contained in
  356. * |buf|. */
  357. int buf_len;
  358. /* num contains the number of bytes of |iv| which are valid for modes that
  359. * manage partial blocks themselves. */
  360. int num;
  361. /* final_used is non-zero if the |final| buffer contains plaintext. */
  362. int final_used;
  363. /* block_mask contains |cipher->block_size| minus one. (The block size
  364. * assumed to be a power of two.) */
  365. int block_mask;
  366. uint8_t final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
  367. } /* EVP_CIPHER_CTX */;
  368. typedef struct evp_cipher_info_st {
  369. const EVP_CIPHER *cipher;
  370. unsigned char iv[EVP_MAX_IV_LENGTH];
  371. } EVP_CIPHER_INFO;
  372. #if defined(__cplusplus)
  373. } /* extern C */
  374. #endif
  375. #define CIPHER_F_EVP_CipherInit_ex 100
  376. #define CIPHER_F_EVP_EncryptFinal_ex 101
  377. #define CIPHER_F_EVP_DecryptFinal_ex 102
  378. #define CIPHER_F_EVP_CIPHER_CTX_ctrl 103
  379. #define CIPHER_F_aes_init_key 104
  380. #define CIPHER_F_aesni_init_key 105
  381. #define CIPHER_F_EVP_CIPHER_CTX_copy 106
  382. #define CIPHER_F_EVP_AEAD_CTX_open 107
  383. #define CIPHER_F_EVP_AEAD_CTX_init 108
  384. #define CIPHER_F_EVP_AEAD_CTX_seal 109
  385. #define CIPHER_F_aead_aes_gcm_seal 110
  386. #define CIPHER_F_aead_aes_gcm_open 111
  387. #define CIPHER_F_aead_aes_gcm_init 112
  388. #define CIPHER_F_aead_chacha20_poly1305_init 113
  389. #define CIPHER_F_aead_chacha20_poly1305_open 114
  390. #define CIPHER_F_aead_chacha20_poly1305_seal 115
  391. #define CIPHER_F_aead_rc4_md5_tls_init 116
  392. #define CIPHER_F_aead_rc4_md5_tls_seal 117
  393. #define CIPHER_F_aead_rc4_md5_tls_open 118
  394. #define CIPHER_F_aead_aes_key_wrap_seal 119
  395. #define CIPHER_F_aead_aes_key_wrap_init 120
  396. #define CIPHER_F_aead_aes_key_wrap_open 121
  397. #define CIPHER_F_EVP_CIPHER_CTX_set_key_length 122
  398. #define CIPHER_R_WRAP_MODE_NOT_ALLOWED 100
  399. #define CIPHER_R_AES_KEY_SETUP_FAILED 101
  400. #define CIPHER_R_INPUT_NOT_INITIALIZED 102
  401. #define CIPHER_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH 103
  402. #define CIPHER_R_INITIALIZATION_ERROR 104
  403. #define CIPHER_R_CTRL_NOT_IMPLEMENTED 105
  404. #define CIPHER_R_NO_CIPHER_SET 106
  405. #define CIPHER_R_BAD_DECRYPT 107
  406. #define CIPHER_R_WRONG_FINAL_BLOCK_LENGTH 108
  407. #define CIPHER_R_CTRL_OPERATION_NOT_IMPLEMENTED 109
  408. #define CIPHER_R_TAG_TOO_LARGE 110
  409. #define CIPHER_R_BAD_KEY_LENGTH 111
  410. #define CIPHER_R_BUFFER_TOO_SMALL 112
  411. #define CIPHER_R_OUTPUT_ALIASES_INPUT 113
  412. #define CIPHER_R_UNSUPPORTED_KEY_SIZE 114
  413. #define CIPHER_R_TOO_LARGE 115
  414. #define CIPHER_R_IV_TOO_LARGE 116
  415. #define CIPHER_R_INVALID_AD_SIZE 117
  416. #define CIPHER_R_INVALID_AD 118
  417. #define CIPHER_R_UNSUPPORTED_TAG_SIZE 119
  418. #define CIPHER_R_UNSUPPORTED_INPUT_SIZE 120
  419. #define CIPHER_R_UNSUPPORTED_AD_SIZE 121
  420. #define CIPHER_R_UNSUPPORTED_NONCE_SIZE 122
  421. #define CIPHER_R_INVALID_KEY_LENGTH 123
  422. #endif /* OPENSSL_HEADER_CIPHER_H */