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Diffstat (limited to 'protocols/MSN/src/des.h')
| -rw-r--r-- | protocols/MSN/src/des.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/protocols/MSN/src/des.h b/protocols/MSN/src/des.h new file mode 100644 index 0000000000..e1fc923fad --- /dev/null +++ b/protocols/MSN/src/des.h @@ -0,0 +1,170 @@ +/** + * \file des.h + */ +#ifndef _DES_H +#define _DES_H + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief DES context structure + */ +typedef struct +{ + unsigned long esk[32]; /*!< DES encryption subkeys */ + unsigned long dsk[32]; /*!< DES decryption subkeys */ +} +des_context; + +/** + * \brief Triple-DES context structure + */ +typedef struct +{ + unsigned long esk[96]; /*!< Triple-DES encryption subkeys */ + unsigned long dsk[96]; /*!< Triple-DES decryption subkeys */ +} +des3_context; + +/** + * \brief DES key schedule (56-bit) + * + * \param ctx DES context to be initialized + * \param key 8-byte secret key + */ +void des_set_key( des_context *ctx, unsigned char key[8] ); + +/** + * \brief DES block encryption (ECB mode) + * + * \param ctx DES context + * \param input plaintext block + * \param output ciphertext block + */ +void des_encrypt( des_context *ctx, + unsigned char input[8], + unsigned char output[8] ); + +/** + * \brief DES block decryption (ECB mode) + * + * \param ctx DES context + * \param input ciphertext block + * \param output plaintext block + */ +void des_decrypt( des_context *ctx, + unsigned char input[8], + unsigned char output[8] ); + +/** + * \brief DES-CBC buffer encryption + * + * \param ctx DES context + * \param iv initialization vector (modified after use) + * \param input buffer holding the plaintext + * \param output buffer holding the ciphertext + * \param len length of the data to be encrypted + */ +void des_cbc_encrypt( des_context *ctx, + unsigned char iv[8], + unsigned char *input, + unsigned char *output, + int len ); + +/** + * \brief DES-CBC buffer decryption + * + * \param ctx DES context + * \param iv initialization vector (modified after use) + * \param input buffer holding the ciphertext + * \param output buffer holding the plaintext + * \param len length of the data to be decrypted + */ +void des_cbc_decrypt( des_context *ctx, + unsigned char iv[8], + unsigned char *input, + unsigned char *output, + int len ); + +/** + * \brief Triple-DES key schedule (112-bit) + * + * \param ctx 3DES context to be initialized + * \param key 16-byte secret key + */ +void des3_set_2keys( des3_context *ctx, unsigned char key[16] ); + +/** + * \brief Triple-DES key schedule (168-bit) + * + * \param ctx 3DES context to be initialized + * \param key 24-byte secret key + */ +void des3_set_3keys( des3_context *ctx, unsigned char key[24] ); + +/** + * \brief Triple-DES block encryption (ECB mode) + * + * \param ctx 3DES context + * \param input plaintext block + * \param output ciphertext block + */ +void des3_encrypt( des3_context *ctx, + unsigned char input[8], + unsigned char output[8] ); + +/** + * \brief Triple-DES block decryption (ECB mode) + * + * \param ctx 3DES context + * \param input ciphertext block + * \param output plaintext block + */ +void des3_decrypt( des3_context *ctx, + unsigned char input[8], + unsigned char output[8] ); + +/** + * \brief 3DES-CBC buffer encryption + * + * \param ctx 3DES context + * \param iv initialization vector (modified after use) + * \param input buffer holding the plaintext + * \param output buffer holding the ciphertext + * \param len length of the data to be encrypted + */ +void des3_cbc_encrypt( des3_context *ctx, + unsigned char iv[8], + unsigned char *input, + unsigned char *output, + int len ); + +/** + * \brief 3DES-CBC buffer decryption + * + * \param ctx 3DES context + * \param iv initialization vector (modified after use) + * \param input buffer holding the ciphertext + * \param output buffer holding the plaintext + * \param len length of the data to be decrypted + */ +void des3_cbc_decrypt( des3_context *ctx, + unsigned char iv[8], + unsigned char *input, + unsigned char *output, + int len ); + +/* + * \brief Checkup routine + * + * \return 0 if successful, or 1 if the test failed + */ +int des_self_test( int verbose ); + +#ifdef __cplusplus +} +#endif + +#endif /* des.h */ |