42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
#ifndef _CRYPTO_AESCTR_H_
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#define _CRYPTO_AESCTR_H_
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#include <stddef.h>
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#include <stdint.h>
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/* Opaque type. */
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struct crypto_aes_key;
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/**
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* crypto_aesctr_init(key, nonce):
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* Prepare to encrypt/decrypt data with AES in CTR mode, using the provided
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* expanded key and nonce. The key provided must remain valid for the
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* lifetime of the stream.
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*/
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struct crypto_aesctr * crypto_aesctr_init(const struct crypto_aes_key *,
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uint64_t);
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/**
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* crypto_aesctr_stream(stream, inbuf, outbuf, buflen):
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* Generate the next ${buflen} bytes of the AES-CTR stream and xor them with
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* bytes from ${inbuf}, writing the result into ${outbuf}. If the buffers
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* ${inbuf} and ${outbuf} overlap, they must be identical.
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*/
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void crypto_aesctr_stream(struct crypto_aesctr *, const uint8_t *,
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uint8_t *, size_t);
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/**
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* crypto_aesctr_free(stream):
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* Free the provided stream object.
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*/
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void crypto_aesctr_free(struct crypto_aesctr *);
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/**
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* crypto_aesctr_buf(key, nonce, inbuf, outbuf, buflen):
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* Equivalent to init(key, nonce); stream(inbuf, outbuf, buflen); free.
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*/
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void crypto_aesctr_buf(const struct crypto_aes_key *, uint64_t,
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const uint8_t *, uint8_t *, size_t);
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#endif /* !_CRYPTO_AESCTR_H_ */
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