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Update aes.h

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kokke 2017-12-06 02:34:27 +01:00 committed by GitHub
parent 4346d1f006
commit 5268e93e58
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1 changed files with 10 additions and 11 deletions
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aes.h
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@ -3,7 +3,6 @@
#include <stdint.h> #include <stdint.h>
// #define the macros below to 1/0 to enable/disable the mode of operation. // #define the macros below to 1/0 to enable/disable the mode of operation.
// //
// CBC enables AES encryption in CBC-mode of operation. // CBC enables AES encryption in CBC-mode of operation.
@ -57,8 +56,8 @@ void AES_ctx_set_iv(struct AES_ctx* ctx, const uint8_t* iv);
#if defined(ECB) && (ECB == 1) #if defined(ECB) && (ECB == 1)
// buffer size is exactly AES_BLOCKLEN bytes; // buffer size is exactly AES_BLOCKLEN bytes;
// you need only AES_init_ctx as Iv is not used in ECB // you need only AES_init_ctx as IV is not used in ECB
// NB: ECB s considered insecure // NB: ECB is considered insecure for most uses
void AES_ECB_encrypt(struct AES_ctx* ctx, const uint8_t* buf); void AES_ECB_encrypt(struct AES_ctx* ctx, const uint8_t* buf);
void AES_ECB_decrypt(struct AES_ctx* ctx, const uint8_t* buf); void AES_ECB_decrypt(struct AES_ctx* ctx, const uint8_t* buf);
@ -67,9 +66,9 @@ void AES_ECB_decrypt(struct AES_ctx* ctx, const uint8_t* buf);
#if defined(CBC) && (CBC == 1) #if defined(CBC) && (CBC == 1)
// buffer size MUST be mutile of AES_BLOCKLEN; // buffer size MUST be mutile of AES_BLOCKLEN;
// We suggest https://en.wikipedia.org/wiki/Padding_(cryptography)#PKCS7 if you need one // Suggest https://en.wikipedia.org/wiki/Padding_(cryptography)#PKCS7 for padding scheme
// you need to set iv in ctx via AES_init_ctx_iv or AES_ctx_set_iv // NOTES: you need to set IV in ctx via AES_init_ctx_iv() or AES_ctx_set_iv()
// NB: no IV should ever be reused with the same key // no IV should ever be reused with the same key
void AES_CBC_encrypt_buffer(struct AES_ctx* ctx, uint8_t* buf, uint32_t length); void AES_CBC_encrypt_buffer(struct AES_ctx* ctx, uint8_t* buf, uint32_t length);
void AES_CBC_decrypt_buffer(struct AES_ctx* ctx, uint8_t* buf, uint32_t length); void AES_CBC_decrypt_buffer(struct AES_ctx* ctx, uint8_t* buf, uint32_t length);
@ -79,11 +78,11 @@ void AES_CBC_decrypt_buffer(struct AES_ctx* ctx, uint8_t* buf, uint32_t length);
#if defined(CTR) && (CTR == 1) #if defined(CTR) && (CTR == 1)
// Same function for encrypting as for decrypting. // Same function for encrypting as for decrypting.
// iv is incremented for every block, and usesd after encryption as xor compliment for output // IV is incremented for every block, and used after encryption as XOR-compliment for output
// buffer size MUST be mutile of AES_BLOCKLEN; // buffer size MUST be multiple of AES_BLOCKLEN;
// We suggest https://en.wikipedia.org/wiki/Padding_(cryptography)#PKCS7 if you need one // Suggesting https://en.wikipedia.org/wiki/Padding_(cryptography)#PKCS7 for padding scheme
// you need to set iv in ctx via AES_init_ctx_iv or AES_ctx_set_iv // NOTES: you need to set IV in ctx with AES_init_ctx_iv() or AES_ctx_set_iv()
// NB: no IV should ever be reused with the same key // no IV should ever be reused with the same key
void AES_CTR_xcrypt_buffer(struct AES_ctx* ctx, uint8_t* buf, uint32_t length); void AES_CTR_xcrypt_buffer(struct AES_ctx* ctx, uint8_t* buf, uint32_t length);
#endif // #if defined(CTR) && (CTR == 1) #endif // #if defined(CTR) && (CTR == 1)