/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #ifndef OPENSSL_HEADER_CIPHER_H #define OPENSSL_HEADER_CIPHER_H #include #if defined(__cplusplus) extern "C" { #endif /* Ciphers. */ /* Cipher primitives. * * The following functions return |EVP_CIPHER| objects that implement the named * cipher algorithm. */ OPENSSL_EXPORT const EVP_CIPHER *EVP_rc4(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_des_cbc(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_des_ecb(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_des_ede_cbc(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_des_ede3_cbc(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_ecb(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_cbc(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_ctr(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_ofb(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_ecb(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_cbc(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_ctr(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_ofb(void); /* Deprecated AES-GCM implementations that set |EVP_CIPH_FLAG_CUSTOM_CIPHER|. * Use |EVP_aead_aes_128_gcm| and |EVP_aead_aes_256_gcm| instead. */ OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_gcm(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_256_gcm(void); /* Deprecated 192-bit version of AES. */ OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_192_ecb(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_192_cbc(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_192_ctr(void); OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_192_gcm(void); /* EVP_enc_null returns a 'cipher' that passes plaintext through as * ciphertext. */ OPENSSL_EXPORT const EVP_CIPHER *EVP_enc_null(void); /* EVP_rc2_40_cbc returns a cipher that implements 40-bit RC2 in CBC mode. This * is obviously very, very weak and is included only in order to read PKCS#12 * files, which often encrypt the certificate chain using this cipher. It is * deliberately not exported. */ const EVP_CIPHER *EVP_rc2_40_cbc(void); /* EVP_get_cipherbynid returns the cipher corresponding to the given NID, or * NULL if no such cipher is known. */ OPENSSL_EXPORT const EVP_CIPHER *EVP_get_cipherbynid(int nid); /* Cipher context allocation. * * An |EVP_CIPHER_CTX| represents the state of an encryption or decryption in * progress. */ /* EVP_CIPHER_CTX_init initialises an, already allocated, |EVP_CIPHER_CTX|. */ OPENSSL_EXPORT void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_new allocates a fresh |EVP_CIPHER_CTX|, calls * |EVP_CIPHER_CTX_init| and returns it, or NULL on allocation failure. */ OPENSSL_EXPORT EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void); /* EVP_CIPHER_CTX_cleanup frees any memory referenced by |ctx|. It returns * one. */ OPENSSL_EXPORT int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_free calls |EVP_CIPHER_CTX_cleanup| on |ctx| and then frees * |ctx| itself. */ OPENSSL_EXPORT void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_copy sets |out| to be a duplicate of the current state of * |in|. The |out| argument must have been previously initialised. */ OPENSSL_EXPORT int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in); /* Cipher context configuration. */ /* EVP_CipherInit_ex configures |ctx| for a fresh encryption (or decryption, if * |enc| is zero) operation using |cipher|. If |ctx| has been previously * configured with a cipher then |cipher|, |key| and |iv| may be |NULL| and * |enc| may be -1 to reuse the previous values. The operation will use |key| * as the key and |iv| as the IV (if any). These should have the correct * lengths given by |EVP_CIPHER_key_length| and |EVP_CIPHER_iv_length|. It * returns one on success and zero on error. */ OPENSSL_EXPORT int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *engine, const uint8_t *key, const uint8_t *iv, int enc); /* EVP_EncryptInit_ex calls |EVP_CipherInit_ex| with |enc| equal to one. */ OPENSSL_EXPORT int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl, const uint8_t *key, const uint8_t *iv); /* EVP_DecryptInit_ex calls |EVP_CipherInit_ex| with |enc| equal to zero. */ OPENSSL_EXPORT int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl, const uint8_t *key, const uint8_t *iv); /* Cipher operations. */ /* EVP_EncryptUpdate encrypts |in_len| bytes from |in| to |out|. The number * of output bytes may be up to |in_len| plus the block length minus one and * |out| must have sufficient space. The number of bytes actually output is * written to |*out_len|. It returns one on success and zero otherwise. */ OPENSSL_EXPORT int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len, const uint8_t *in, int in_len); /* EVP_EncryptFinal_ex writes at most a block of ciphertext to |out| and sets * |*out_len| to the number of bytes written. If padding is enabled (the * default) then standard padding is applied to create the final block. If * padding is disabled (with |EVP_CIPHER_CTX_set_padding|) then any partial * block remaining will cause an error. The function returns one on success and * zero otherwise. */ OPENSSL_EXPORT int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len); /* EVP_DecryptUpdate decrypts |in_len| bytes from |in| to |out|. The number of * output bytes may be up to |in_len| plus the block length minus one and |out| * must have sufficient space. The number of bytes actually output is written * to |*out_len|. It returns one on success and zero otherwise. */ OPENSSL_EXPORT int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len, const uint8_t *in, int in_len); /* EVP_DecryptFinal_ex writes at most a block of ciphertext to |out| and sets * |*out_len| to the number of bytes written. If padding is enabled (the * default) then padding is removed from the final block. * * WARNING: it is unsafe to call this function with unauthenticted * ciphertext if padding is enabled. */ OPENSSL_EXPORT int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *out_len); /* EVP_Cipher performs a one-shot encryption/decryption operation. No partial * blocks are maintained between calls. However, any internal cipher state is * still updated. For CBC-mode ciphers, the IV is updated to the final * ciphertext block. For stream ciphers, the stream is advanced past the bytes * used. It returns one on success and zero otherwise, unless |EVP_CIPHER_flags| * has |EVP_CIPH_FLAG_CUSTOM_CIPHER| set. Then it returns the number of bytes * written or -1 on error. * * WARNING: this differs from the usual return value convention when using * |EVP_CIPH_FLAG_CUSTOM_CIPHER|. * * TODO(davidben): The normal ciphers currently never fail, even if, e.g., * |in_len| is not a multiple of the block size for CBC-mode decryption. The * input just gets rounded up while the output gets truncated. This should * either be officially documented or fail. */ OPENSSL_EXPORT int EVP_Cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in, size_t in_len); /* EVP_CipherUpdate calls either |EVP_EncryptUpdate| or |EVP_DecryptUpdate| * depending on how |ctx| has been setup. */ OPENSSL_EXPORT int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len, const uint8_t *in, int in_len); /* EVP_CipherFinal_ex calls either |EVP_EncryptFinal_ex| or * |EVP_DecryptFinal_ex| depending on how |ctx| has been setup. */ OPENSSL_EXPORT int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len); /* Cipher context accessors. */ /* EVP_CIPHER_CTX_cipher returns the |EVP_CIPHER| underlying |ctx|, or NULL if * none has been set. */ OPENSSL_EXPORT const EVP_CIPHER *EVP_CIPHER_CTX_cipher( const EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_nid returns a NID identifying the |EVP_CIPHER| underlying * |ctx| (e.g. |NID_aes_128_gcm|). It will crash if no cipher has been * configured. */ OPENSSL_EXPORT int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_block_size returns the block size, in bytes, of the cipher * underlying |ctx|, or one if the cipher is a stream cipher. It will crash if * no cipher has been configured. */ OPENSSL_EXPORT unsigned EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_key_length returns the key size, in bytes, of the cipher * underlying |ctx| or zero if no cipher has been configured. */ OPENSSL_EXPORT unsigned EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_iv_length returns the IV size, in bytes, of the cipher * underlying |ctx|. It will crash if no cipher has been configured. */ OPENSSL_EXPORT unsigned EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_get_app_data returns the opaque, application data pointer for * |ctx|, or NULL if none has been set. */ OPENSSL_EXPORT void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_set_app_data sets the opaque, application data pointer for * |ctx| to |data|. */ OPENSSL_EXPORT void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data); /* EVP_CIPHER_CTX_flags returns a value which is the OR of zero or more * |EVP_CIPH_*| flags. It will crash if no cipher has been configured. */ OPENSSL_EXPORT uint32_t EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_mode returns one of the |EVP_CIPH_*| cipher mode values * enumerated below. It will crash if no cipher has been configured. */ OPENSSL_EXPORT uint32_t EVP_CIPHER_CTX_mode(const EVP_CIPHER_CTX *ctx); /* EVP_CIPHER_CTX_ctrl is an |ioctl| like function. The |command| argument * should be one of the |EVP_CTRL_*| values. The |arg| and |ptr| arguments are * specific to the command in question. */ OPENSSL_EXPORT int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int command, int arg, void *ptr); /* EVP_CIPHER_CTX_set_padding sets whether padding is enabled for |ctx| and * returns one. Pass a non-zero |pad| to enable padding (the default) or zero * to disable. */ OPENSSL_EXPORT int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad); /* EVP_CIPHER_CTX_set_key_length sets the key length for |ctx|. This is only * valid for ciphers that can take a variable length key. It returns one on * success and zero on error. */ OPENSSL_EXPORT int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *ctx, unsigned key_len); /* Cipher accessors. */ /* EVP_CIPHER_nid returns a NID identifing |cipher|. (For example, * |NID_aes_128_gcm|.) */ OPENSSL_EXPORT int EVP_CIPHER_nid(const EVP_CIPHER *cipher); /* EVP_CIPHER_block_size returns the block size, in bytes, for |cipher|, or one * if |cipher| is a stream cipher. */ OPENSSL_EXPORT unsigned EVP_CIPHER_block_size(const EVP_CIPHER *cipher); /* EVP_CIPHER_key_length returns the key size, in bytes, for |cipher|. If * |cipher| can take a variable key length then this function returns the * default key length and |EVP_CIPHER_flags| will return a value with * |EVP_CIPH_VARIABLE_LENGTH| set. */ OPENSSL_EXPORT unsigned EVP_CIPHER_key_length(const EVP_CIPHER *cipher); /* EVP_CIPHER_iv_length returns the IV size, in bytes, of |cipher|, or zero if * |cipher| doesn't take an IV. */ OPENSSL_EXPORT unsigned EVP_CIPHER_iv_length(const EVP_CIPHER *cipher); /* EVP_CIPHER_flags returns a value which is the OR of zero or more * |EVP_CIPH_*| flags. */ OPENSSL_EXPORT uint32_t EVP_CIPHER_flags(const EVP_CIPHER *cipher); /* EVP_CIPHER_mode returns one of the cipher mode values enumerated below. */ OPENSSL_EXPORT uint32_t EVP_CIPHER_mode(const EVP_CIPHER *cipher); /* Key derivation. */ /* EVP_BytesToKey generates a key and IV for the cipher |type| by iterating * |md| |count| times using |data| and |salt|. On entry, the |key| and |iv| * buffers must have enough space to hold a key and IV for |type|. It returns * the length of the key on success or zero on error. */ OPENSSL_EXPORT int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, const uint8_t *salt, const uint8_t *data, size_t data_len, unsigned count, uint8_t *key, uint8_t *iv); /* Cipher modes (for |EVP_CIPHER_mode|). */ #define EVP_CIPH_STREAM_CIPHER 0x0 #define EVP_CIPH_ECB_MODE 0x1 #define EVP_CIPH_CBC_MODE 0x2 #define EVP_CIPH_CFB_MODE 0x3 #define EVP_CIPH_OFB_MODE 0x4 #define EVP_CIPH_CTR_MODE 0x5 #define EVP_CIPH_GCM_MODE 0x6 /* Cipher flags (for |EVP_CIPHER_flags|). */ /* EVP_CIPH_VARIABLE_LENGTH indicates that the cipher takes a variable length * key. */ #define EVP_CIPH_VARIABLE_LENGTH 0x40 /* EVP_CIPH_ALWAYS_CALL_INIT indicates that the |init| function for the cipher * should always be called when initialising a new operation, even if the key * is NULL to indicate that the same key is being used. */ #define EVP_CIPH_ALWAYS_CALL_INIT 0x80 /* EVP_CIPH_CUSTOM_IV indicates that the cipher manages the IV itself rather * than keeping it in the |iv| member of |EVP_CIPHER_CTX|. */ #define EVP_CIPH_CUSTOM_IV 0x100 /* EVP_CIPH_CTRL_INIT indicates that EVP_CTRL_INIT should be used when * initialising an |EVP_CIPHER_CTX|. */ #define EVP_CIPH_CTRL_INIT 0x200 /* EVP_CIPH_FLAG_CUSTOM_CIPHER indicates that the cipher manages blocking * itself. This causes EVP_(En|De)crypt_ex to be simple wrapper functions. */ #define EVP_CIPH_FLAG_CUSTOM_CIPHER 0x400 /* EVP_CIPH_FLAG_AEAD_CIPHER specifies that the cipher is an AEAD. This is an * older version of the proper AEAD interface. See aead.h for the current * one. */ #define EVP_CIPH_FLAG_AEAD_CIPHER 0x800 /* EVP_CIPH_CUSTOM_COPY indicates that the |ctrl| callback should be called * with |EVP_CTRL_COPY| at the end of normal |EVP_CIPHER_CTX_copy| * processing. */ #define EVP_CIPH_CUSTOM_COPY 0x1000 /* Deprecated functions */ /* EVP_CipherInit acts like EVP_CipherInit_ex except that |EVP_CIPHER_CTX_init| * is called on |cipher| first, if |cipher| is not NULL. */ OPENSSL_EXPORT int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, const uint8_t *key, const uint8_t *iv, int enc); /* EVP_EncryptInit calls |EVP_CipherInit| with |enc| equal to one. */ OPENSSL_EXPORT int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, const uint8_t *key, const uint8_t *iv); /* EVP_DecryptInit calls |EVP_CipherInit| with |enc| equal to zero. */ OPENSSL_EXPORT int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, const uint8_t *key, const uint8_t *iv); /* EVP_add_cipher_alias does nothing and returns one. */ OPENSSL_EXPORT int EVP_add_cipher_alias(const char *a, const char *b); /* EVP_get_cipherbyname returns an |EVP_CIPHER| given a human readable name in * |name|, or NULL if the name is unknown. */ OPENSSL_EXPORT const EVP_CIPHER *EVP_get_cipherbyname(const char *name); /* Private functions. */ /* EVP_CIPH_NO_PADDING disables padding in block ciphers. */ #define EVP_CIPH_NO_PADDING 0x800 /* EVP_CIPHER_CTX_ctrl commands. */ #define EVP_CTRL_INIT 0x0 #define EVP_CTRL_SET_KEY_LENGTH 0x1 #define EVP_CTRL_GET_RC2_KEY_BITS 0x2 #define EVP_CTRL_SET_RC2_KEY_BITS 0x3 #define EVP_CTRL_GET_RC5_ROUNDS 0x4 #define EVP_CTRL_SET_RC5_ROUNDS 0x5 #define EVP_CTRL_RAND_KEY 0x6 #define EVP_CTRL_PBE_PRF_NID 0x7 #define EVP_CTRL_COPY 0x8 #define EVP_CTRL_GCM_SET_IVLEN 0x9 #define EVP_CTRL_GCM_GET_TAG 0x10 #define EVP_CTRL_GCM_SET_TAG 0x11 #define EVP_CTRL_GCM_SET_IV_FIXED 0x12 #define EVP_CTRL_GCM_IV_GEN 0x13 #define EVP_CTRL_AEAD_SET_MAC_KEY 0x17 /* Set the GCM invocation field, decrypt only */ #define EVP_CTRL_GCM_SET_IV_INV 0x18 /* GCM TLS constants */ /* Length of fixed part of IV derived from PRF */ #define EVP_GCM_TLS_FIXED_IV_LEN 4 /* Length of explicit part of IV part of TLS records */ #define EVP_GCM_TLS_EXPLICIT_IV_LEN 8 /* Length of tag for TLS */ #define EVP_GCM_TLS_TAG_LEN 16 #define EVP_MAX_KEY_LENGTH 64 #define EVP_MAX_IV_LENGTH 16 #define EVP_MAX_BLOCK_LENGTH 32 struct evp_cipher_ctx_st { /* cipher contains the underlying cipher for this context. */ const EVP_CIPHER *cipher; /* app_data is a pointer to opaque, user data. */ void *app_data; /* application stuff */ /* cipher_data points to the |cipher| specific state. */ void *cipher_data; /* key_len contains the length of the key, which may differ from * |cipher->key_len| if the cipher can take a variable key length. */ unsigned key_len; /* encrypt is one if encrypting and zero if decrypting. */ int encrypt; /* flags contains the OR of zero or more |EVP_CIPH_*| flags, above. */ uint32_t flags; /* oiv contains the original IV value. */ uint8_t oiv[EVP_MAX_IV_LENGTH]; /* iv contains the current IV value, which may have been updated. */ uint8_t iv[EVP_MAX_IV_LENGTH]; /* buf contains a partial block which is used by, for example, CTR mode to * store unused keystream bytes. */ uint8_t buf[EVP_MAX_BLOCK_LENGTH]; /* buf_len contains the number of bytes of a partial block contained in * |buf|. */ int buf_len; /* num contains the number of bytes of |iv| which are valid for modes that * manage partial blocks themselves. */ int num; /* final_used is non-zero if the |final| buffer contains plaintext. */ int final_used; /* block_mask contains |cipher->block_size| minus one. (The block size * assumed to be a power of two.) */ int block_mask; uint8_t final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */ } /* EVP_CIPHER_CTX */; typedef struct evp_cipher_info_st { const EVP_CIPHER *cipher; unsigned char iv[EVP_MAX_IV_LENGTH]; } EVP_CIPHER_INFO; struct evp_cipher_st { /* type contains a NID identifing the cipher. (e.g. NID_aes_128_gcm.) */ int nid; /* block_size contains the block size, in bytes, of the cipher, or 1 for a * stream cipher. */ unsigned block_size; /* key_len contains the key size, in bytes, for the cipher. If the cipher * takes a variable key size then this contains the default size. */ unsigned key_len; /* iv_len contains the IV size, in bytes, or zero if inapplicable. */ unsigned iv_len; /* ctx_size contains the size, in bytes, of the per-key context for this * cipher. */ unsigned ctx_size; /* flags contains the OR of a number of flags. See |EVP_CIPH_*|. */ uint32_t flags; /* app_data is a pointer to opaque, user data. */ void *app_data; int (*init)(EVP_CIPHER_CTX *ctx, const uint8_t *key, const uint8_t *iv, int enc); int (*cipher)(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in, size_t inl); /* cleanup, if non-NULL, releases memory associated with the context. It is * called if |EVP_CTRL_INIT| succeeds. Note that |init| may not have been * called at this point. */ void (*cleanup)(EVP_CIPHER_CTX *); int (*ctrl)(EVP_CIPHER_CTX *, int type, int arg, void *ptr); }; #if defined(__cplusplus) } /* extern C */ #endif #define CIPHER_F_EVP_AEAD_CTX_init 100 #define CIPHER_F_EVP_AEAD_CTX_open 101 #define CIPHER_F_EVP_AEAD_CTX_seal 102 #define CIPHER_F_EVP_CIPHER_CTX_copy 103 #define CIPHER_F_EVP_CIPHER_CTX_ctrl 104 #define CIPHER_F_EVP_CIPHER_CTX_set_key_length 105 #define CIPHER_F_EVP_CipherInit_ex 106 #define CIPHER_F_EVP_DecryptFinal_ex 107 #define CIPHER_F_EVP_EncryptFinal_ex 108 #define CIPHER_F_aead_aes_gcm_init 109 #define CIPHER_F_aead_aes_gcm_open 110 #define CIPHER_F_aead_aes_gcm_seal 111 #define CIPHER_F_aead_aes_key_wrap_init 112 #define CIPHER_F_aead_aes_key_wrap_open 113 #define CIPHER_F_aead_aes_key_wrap_seal 114 #define CIPHER_F_aead_chacha20_poly1305_init 115 #define CIPHER_F_aead_chacha20_poly1305_open 116 #define CIPHER_F_aead_chacha20_poly1305_seal 117 #define CIPHER_F_aead_rc4_md5_tls_init 118 #define CIPHER_F_aead_rc4_md5_tls_open 119 #define CIPHER_F_aead_rc4_md5_tls_seal 120 #define CIPHER_F_aead_ssl3_ensure_cipher_init 121 #define CIPHER_F_aead_ssl3_init 122 #define CIPHER_F_aead_ssl3_open 123 #define CIPHER_F_aead_ssl3_seal 124 #define CIPHER_F_aead_tls_ensure_cipher_init 125 #define CIPHER_F_aead_tls_init 126 #define CIPHER_F_aead_tls_open 127 #define CIPHER_F_aead_tls_seal 128 #define CIPHER_F_aes_init_key 129 #define CIPHER_F_aesni_init_key 130 #define CIPHER_F_EVP_AEAD_CTX_init_with_direction 131 #define CIPHER_F_aead_aes_ctr_hmac_sha256_init 132 #define CIPHER_F_aead_aes_ctr_hmac_sha256_open 133 #define CIPHER_F_aead_aes_ctr_hmac_sha256_seal 134 #define CIPHER_R_AES_KEY_SETUP_FAILED 100 #define CIPHER_R_BAD_DECRYPT 101 #define CIPHER_R_BAD_KEY_LENGTH 102 #define CIPHER_R_BUFFER_TOO_SMALL 103 #define CIPHER_R_CTRL_NOT_IMPLEMENTED 104 #define CIPHER_R_CTRL_OPERATION_NOT_IMPLEMENTED 105 #define CIPHER_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH 106 #define CIPHER_R_INITIALIZATION_ERROR 107 #define CIPHER_R_INPUT_NOT_INITIALIZED 108 #define CIPHER_R_INVALID_AD_SIZE 109 #define CIPHER_R_INVALID_KEY_LENGTH 110 #define CIPHER_R_INVALID_NONCE_SIZE 111 #define CIPHER_R_INVALID_OPERATION 112 #define CIPHER_R_IV_TOO_LARGE 113 #define CIPHER_R_NO_CIPHER_SET 114 #define CIPHER_R_OUTPUT_ALIASES_INPUT 115 #define CIPHER_R_TAG_TOO_LARGE 116 #define CIPHER_R_TOO_LARGE 117 #define CIPHER_R_UNSUPPORTED_AD_SIZE 118 #define CIPHER_R_UNSUPPORTED_INPUT_SIZE 119 #define CIPHER_R_UNSUPPORTED_KEY_SIZE 120 #define CIPHER_R_UNSUPPORTED_NONCE_SIZE 121 #define CIPHER_R_UNSUPPORTED_TAG_SIZE 122 #define CIPHER_R_WRONG_FINAL_BLOCK_LENGTH 123 #define CIPHER_R_NO_DIRECTION_SET 124 #endif /* OPENSSL_HEADER_CIPHER_H */