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- Clarified use of AES and Camellia in CFB and CTR modes

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This commit is contained in:
Paul Bakker
2011-10-06 13:11:08 +00:00
parent 490ecc8c3e
commit ca6f3e24a4
3 changed files with 20 additions and 0 deletions
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9
include/polarssl/aes.h
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@@ -111,6 +111,11 @@ int aes_crypt_cbc( aes_context *ctx,
/**
* \brief AES-CFB128 buffer encryption/decryption.
*
* Note: Due to the nature of CFB you should use the same key schedule for
* both encryption and decryption. So a context initialized with
* aes_setkey_enc() for both AES_ENCRYPT and AES_DECRYPT.
*
* both
* \param ctx AES context
* \param mode AES_ENCRYPT or AES_DECRYPT
* \param length length of the input data
@@ -134,6 +139,10 @@ int aes_crypt_cfb128( aes_context *ctx,
*
* Warning: You have to keep the maximum use of your counter in mind!
*
* Note: Due to the nature of CTR you should use the same key schedule for
* both encryption and decryption. So a context initialized with
* aes_setkey_enc() for both AES_ENCRYPT and AES_DECRYPT.
*
* \param length The length of the data
* \param nc_off The offset in the current stream_block (for resuming
* within current cipher stream). The offset pointer to

8
include/polarssl/camellia.h
View File

@@ -117,6 +117,10 @@ int camellia_crypt_cbc( camellia_context *ctx,
/**
* \brief CAMELLIA-CFB128 buffer encryption/decryption
*
* Note: Due to the nature of CFB you should use the same key schedule for
* both encryption and decryption. So a context initialized with
* camellia_setkey_enc() for both CAMELLIA_ENCRYPT and CAMELLIE_DECRYPT.
*
* \param ctx CAMELLIA context
* \param mode CAMELLIA_ENCRYPT or CAMELLIA_DECRYPT
* \param length length of the input data
@@ -140,6 +144,10 @@ int camellia_crypt_cfb128( camellia_context *ctx,
*
* Warning: You have to keep the maximum use of your counter in mind!
*
* Note: Due to the nature of CTR you should use the same key schedule for
* both encryption and decryption. So a context initialized with
* camellia_setkey_enc() for both CAMELLIA_ENCRYPT and CAMELLIA_DECRYPT.
*
* \param length The length of the data
* \param nc_off The offset in the current stream_block (for resuming
* within current cipher stream). The offset pointer to