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54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
#ifndef _HAVE_PCP_MAC
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#define _HAVE_PCP_MAC
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#include <strings.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sodium.h>
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#include "pad.h"
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#include "mem.h"
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// how many times do we hash the passphrase
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#define HCYCLES 128000
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// encrypt some arbitrary cleartext using
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// a curve25519 secret key and a given nonce.
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//
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// expects a pointer to the target binary
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// stream containing the encrypted data,
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// the cleartext string, its size, the nonce
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// (24 bytes) and the secret key (32 bytes).
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//
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// allocates memory for the returned cipher
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// and it is up to the user to free it after use.
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//
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// returns the size of the returned cipherstream.
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// in case of an error, the cipher will be set
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// to NULL.
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size_t pcp_sodium_mac(unsigned char **cipher,
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unsigned char *cleartext,
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size_t clearsize,
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unsigned char *nonce,
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unsigned char *key);
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// does the opposite of pcp_sodium_mac and decrypts
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// a given encrypted binary stream using a nonce and
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// a secret key (sizes: see above).
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//
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// allocates memory for the returned cleartext and
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// it is up to the user to free it after use.
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//
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// returns 0 if decryption and verification were
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// successful, otherwise -1.
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int pcp_sodium_verify_mac(unsigned char **cleartext,
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unsigned char* message,
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size_t messagesize,
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unsigned char *nonce,
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unsigned char *key);
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#endif // _HAVE_PCP_MAC
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