1 /******************************************************************************/
2 /* LICENSE:                                                                   */
3 /* This submission to NSS is to be made available under the terms of the      */
4 /* Mozilla Public License, v. 2.0. You can obtain one at http:                */
5 /* //mozilla.org/MPL/2.0/.                                                    */
6 /******************************************************************************/
7 
8 #ifndef PPC_GCM_H
9 #define PPC_GCM_H 1
10 
11 #include "blapii.h"
12 
13 typedef struct ppc_AES_GCMContextStr ppc_AES_GCMContext;
14 
15 ppc_AES_GCMContext *ppc_AES_GCM_CreateContext(void *context, freeblCipherFunc cipher,
16                                               const unsigned char *params);
17 
18 void ppc_AES_GCM_DestroyContext(ppc_AES_GCMContext *gcm, PRBool freeit);
19 
20 SECStatus ppc_AES_GCM_EncryptUpdate(ppc_AES_GCMContext *gcm, unsigned char *outbuf,
21                                     unsigned int *outlen, unsigned int maxout,
22                                     const unsigned char *inbuf, unsigned int inlen,
23                                     unsigned int blocksize);
24 
25 SECStatus ppc_AES_GCM_DecryptUpdate(ppc_AES_GCMContext *gcm, unsigned char *outbuf,
26                                     unsigned int *outlen, unsigned int maxout,
27                                     const unsigned char *inbuf, unsigned int inlen,
28                                     unsigned int blocksize);
29 SECStatus ppc_AES_GCM_EncryptAEAD(ppc_AES_GCMContext *gcm,
30                                   unsigned char *outbuf,
31                                   unsigned int *outlen, unsigned int maxout,
32                                   const unsigned char *inbuf, unsigned int inlen,
33                                   void *params, unsigned int paramLen,
34                                   const unsigned char *aad, unsigned int aadLen,
35                                   unsigned int blocksize);
36 SECStatus ppc_AES_GCM_DecryptAEAD(ppc_AES_GCMContext *gcm,
37                                   unsigned char *outbuf,
38                                   unsigned int *outlen, unsigned int maxout,
39                                   const unsigned char *inbuf, unsigned int inlen,
40                                   void *params, unsigned int paramLen,
41                                   const unsigned char *aad, unsigned int aadLen,
42                                   unsigned int blocksize);
43 
44 /* Prototypes of the functions defined in the assembler file.  */
45 
46 /* Prepares the constants used in the aggregated reduction method */
47 void ppc_aes_gcmINIT(unsigned char Htbl[8 * 16],
48                      PRUint32 *KS,
49                      int NR);
50 
51 /* Produces the final GHASH value */
52 void ppc_aes_gcmTAG(unsigned char Htbl[8 * 16],
53                     unsigned char *Tp,
54                     unsigned long Mlen,
55                     unsigned long Alen,
56                     unsigned char *X0,
57                     unsigned char *TAG);
58 
59 /* Hashes the Additional Authenticated Data, should be used before enc/dec.
60    Operates on any length of data. Partial block is padded internally. */
61 void ppc_aes_gcmHASH(unsigned char Htbl[8 * 16],
62                      const unsigned char *AAD,
63                      unsigned long Alen,
64                      unsigned char *Tp);
65 
66 /* Crypt only, used in combination with ppc_aes_gcmAAD().
67    Operates on any length of data, however partial block should only be encrypted
68    at the last call, otherwise the result will be incorrect. */
69 void ppc_aes_gcmCRYPT(const unsigned char *PT,
70                       unsigned char *CT,
71                       unsigned long len,
72                       unsigned char *CTRP,
73                       PRUint32 *KS,
74                       int NR);
75 
76 #endif
77