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IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS 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. * ==================================================================== */ #ifndef OPENSSL_HEADER_AES_H #define OPENSSL_HEADER_AES_H #include <openssl/base.h> #if defined(__cplusplus) extern "C" { #endif // Raw AES functions. #define AES_ENCRYPT … #define AES_DECRYPT … // AES_MAXNR is the maximum number of AES rounds. #define AES_MAXNR … #define AES_BLOCK_SIZE … // aes_key_st should be an opaque type, but EVP requires that the size be // known. struct aes_key_st { … }; AES_KEY; // AES_set_encrypt_key configures |aeskey| to encrypt with the |bits|-bit key, // |key|. |key| must point to |bits|/8 bytes. It returns zero on success and a // negative number if |bits| is an invalid AES key size. // // WARNING: this function breaks the usual return value convention. OPENSSL_EXPORT int AES_set_encrypt_key(const uint8_t *key, unsigned bits, AES_KEY *aeskey); // AES_set_decrypt_key configures |aeskey| to decrypt with the |bits|-bit key, // |key|. |key| must point to |bits|/8 bytes. It returns zero on success and a // negative number if |bits| is an invalid AES key size. // // WARNING: this function breaks the usual return value convention. OPENSSL_EXPORT int AES_set_decrypt_key(const uint8_t *key, unsigned bits, AES_KEY *aeskey); // AES_encrypt encrypts a single block from |in| to |out| with |key|. The |in| // and |out| pointers may overlap. OPENSSL_EXPORT void AES_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key); // AES_decrypt decrypts a single block from |in| to |out| with |key|. The |in| // and |out| pointers may overlap. OPENSSL_EXPORT void AES_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key); // Block cipher modes. // AES_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode) |len| // bytes from |in| to |out|. The |num| parameter must be set to zero on the // first call and |ivec| will be incremented. This function may be called // in-place with |in| equal to |out|, but otherwise the buffers may not // partially overlap. A partial overlap may overwrite input data before it is // read. OPENSSL_EXPORT void AES_ctr128_encrypt(const uint8_t *in, uint8_t *out, size_t len, const AES_KEY *key, uint8_t ivec[AES_BLOCK_SIZE], uint8_t ecount_buf[AES_BLOCK_SIZE], unsigned int *num); // AES_ecb_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) a single, // 16 byte block from |in| to |out|. This function may be called in-place with // |in| equal to |out|, but otherwise the buffers may not partially overlap. A // partial overlap may overwrite input data before it is read. OPENSSL_EXPORT void AES_ecb_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key, const int enc); // AES_cbc_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) |len| // bytes from |in| to |out|. The length must be a multiple of the block size. // This function may be called in-place with |in| equal to |out|, but otherwise // the buffers may not partially overlap. A partial overlap may overwrite input // data before it is read. OPENSSL_EXPORT void AES_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len, const AES_KEY *key, uint8_t *ivec, const int enc); // AES_ofb128_encrypt encrypts (or decrypts, it's the same in OFB mode) |len| // bytes from |in| to |out|. The |num| parameter must be set to zero on the // first call. This function may be called in-place with |in| equal to |out|, // but otherwise the buffers may not partially overlap. A partial overlap may // overwrite input data before it is read. OPENSSL_EXPORT void AES_ofb128_encrypt(const uint8_t *in, uint8_t *out, size_t len, const AES_KEY *key, uint8_t *ivec, int *num); // AES_cfb128_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) |len| // bytes from |in| to |out|. The |num| parameter must be set to zero on the // first call. This function may be called in-place with |in| equal to |out|, // but otherwise the buffers may not partially overlap. A partial overlap may // overwrite input data before it is read. OPENSSL_EXPORT void AES_cfb128_encrypt(const uint8_t *in, uint8_t *out, size_t len, const AES_KEY *key, uint8_t *ivec, int *num, int enc); // AES key wrap. // // These functions implement AES Key Wrap mode, as defined in RFC 3394. They // should never be used except to interoperate with existing systems that use // this mode. // AES_wrap_key performs AES key wrap on |in| which must be a multiple of 8 // bytes. |iv| must point to an 8 byte value or be NULL to use the default IV. // |key| must have been configured for encryption. On success, it writes // |in_len| + 8 bytes to |out| and returns |in_len| + 8. Otherwise, it returns // -1. OPENSSL_EXPORT int AES_wrap_key(const AES_KEY *key, const uint8_t *iv, uint8_t *out, const uint8_t *in, size_t in_len); // AES_unwrap_key performs AES key unwrap on |in| which must be a multiple of 8 // bytes. |iv| must point to an 8 byte value or be NULL to use the default IV. // |key| must have been configured for decryption. On success, it writes // |in_len| - 8 bytes to |out| and returns |in_len| - 8. Otherwise, it returns // -1. OPENSSL_EXPORT int AES_unwrap_key(const AES_KEY *key, const uint8_t *iv, uint8_t *out, const uint8_t *in, size_t in_len); // AES key wrap with padding. // // These functions implement AES Key Wrap with Padding mode, as defined in RFC // 5649. They should never be used except to interoperate with existing systems // that use this mode. // AES_wrap_key_padded performs a padded AES key wrap on |in| which must be // between 1 and 2^32-1 bytes. |key| must have been configured for encryption. // On success it writes at most |max_out| bytes of ciphertext to |out|, sets // |*out_len| to the number of bytes written, and returns one. On failure it // returns zero. To ensure success, set |max_out| to at least |in_len| + 15. OPENSSL_EXPORT int AES_wrap_key_padded(const AES_KEY *key, uint8_t *out, size_t *out_len, size_t max_out, const uint8_t *in, size_t in_len); // AES_unwrap_key_padded performs a padded AES key unwrap on |in| which must be // a multiple of 8 bytes. |key| must have been configured for decryption. On // success it writes at most |max_out| bytes to |out|, sets |*out_len| to the // number of bytes written, and returns one. On failure it returns zero. Setting // |max_out| to |in_len| is a sensible estimate. OPENSSL_EXPORT int AES_unwrap_key_padded(const AES_KEY *key, uint8_t *out, size_t *out_len, size_t max_out, const uint8_t *in, size_t in_len); #if defined(__cplusplus) } // extern C #endif #endif // OPENSSL_HEADER_AES_H
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