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- #ifndef _GPXE_CRYPTO_H
- #define _GPXE_CRYPTO_H
-
- /** @file
- *
- * Cryptographic API
- *
- */
-
- FILE_LICENCE ( GPL2_OR_LATER );
-
- #include <stdint.h>
- #include <stddef.h>
-
- /** A message digest algorithm */
- struct digest_algorithm {
- /** Algorithm name */
- const char *name;
- /** Context size */
- size_t ctxsize;
- /** Block size */
- size_t blocksize;
- /** Digest size */
- size_t digestsize;
- /** Initialise digest
- *
- * @v ctx Context
- */
- void ( * init ) ( void *ctx );
- /** Update digest with new data
- *
- * @v ctx Context
- * @v src Data to digest
- * @v len Length of data
- *
- * @v len is not necessarily a multiple of @c blocksize.
- */
- void ( * update ) ( void *ctx, const void *src, size_t len );
- /** Finalise digest
- *
- * @v ctx Context
- * @v out Buffer for digest output
- */
- void ( * final ) ( void *ctx, void *out );
- };
-
- /** A cipher algorithm */
- struct cipher_algorithm {
- /** Algorithm name */
- const char *name;
- /** Context size */
- size_t ctxsize;
- /** Block size */
- size_t blocksize;
- /** Set key
- *
- * @v ctx Context
- * @v key Key
- * @v keylen Key length
- * @ret rc Return status code
- */
- int ( * setkey ) ( void *ctx, const void *key, size_t keylen );
- /** Set initialisation vector
- *
- * @v ctx Context
- * @v iv Initialisation vector
- */
- void ( * setiv ) ( void *ctx, const void *iv );
- /** Encrypt data
- *
- * @v ctx Context
- * @v src Data to encrypt
- * @v dst Buffer for encrypted data
- * @v len Length of data
- *
- * @v len is guaranteed to be a multiple of @c blocksize.
- */
- void ( * encrypt ) ( void *ctx, const void *src, void *dst,
- size_t len );
- /** Decrypt data
- *
- * @v ctx Context
- * @v src Data to decrypt
- * @v dst Buffer for decrypted data
- * @v len Length of data
- *
- * @v len is guaranteed to be a multiple of @c blocksize.
- */
- void ( * decrypt ) ( void *ctx, const void *src, void *dst,
- size_t len );
- };
-
- /** A public key algorithm */
- struct pubkey_algorithm {
- /** Algorithm name */
- const char *name;
- /** Context size */
- size_t ctxsize;
- };
-
- static inline void digest_init ( struct digest_algorithm *digest,
- void *ctx ) {
- digest->init ( ctx );
- }
-
- static inline void digest_update ( struct digest_algorithm *digest,
- void *ctx, const void *data, size_t len ) {
- digest->update ( ctx, data, len );
- }
-
- static inline void digest_final ( struct digest_algorithm *digest,
- void *ctx, void *out ) {
- digest->final ( ctx, out );
- }
-
- static inline int cipher_setkey ( struct cipher_algorithm *cipher,
- void *ctx, const void *key, size_t keylen ) {
- return cipher->setkey ( ctx, key, keylen );
- }
-
- static inline void cipher_setiv ( struct cipher_algorithm *cipher,
- void *ctx, const void *iv ) {
- cipher->setiv ( ctx, iv );
- }
-
- static inline void cipher_encrypt ( struct cipher_algorithm *cipher,
- void *ctx, const void *src, void *dst,
- size_t len ) {
- cipher->encrypt ( ctx, src, dst, len );
- }
- #define cipher_encrypt( cipher, ctx, src, dst, len ) do { \
- assert ( ( len & ( (cipher)->blocksize - 1 ) ) == 0 ); \
- cipher_encrypt ( (cipher), (ctx), (src), (dst), (len) ); \
- } while ( 0 )
-
- static inline void cipher_decrypt ( struct cipher_algorithm *cipher,
- void *ctx, const void *src, void *dst,
- size_t len ) {
- cipher->decrypt ( ctx, src, dst, len );
- }
- #define cipher_decrypt( cipher, ctx, src, dst, len ) do { \
- assert ( ( len & ( (cipher)->blocksize - 1 ) ) == 0 ); \
- cipher_decrypt ( (cipher), (ctx), (src), (dst), (len) ); \
- } while ( 0 )
-
- static inline int is_stream_cipher ( struct cipher_algorithm *cipher ) {
- return ( cipher->blocksize == 1 );
- }
-
- extern struct digest_algorithm digest_null;
- extern struct cipher_algorithm cipher_null;
- extern struct pubkey_algorithm pubkey_null;
-
- #endif /* _GPXE_CRYPTO_H */
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