/security/nss/lib/freebl/alghmac.h

http://github.com/zpao/v8monkey · C Header · 96 lines · 23 code · 12 blank · 61 comment · 0 complexity · 9e18194df53e0e14b167a777681c17b2 MD5 · raw file

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  36. #ifndef _ALGHMAC_H_
  37. #define _ALGHMAC_H_
  38. typedef struct HMACContextStr HMACContext;
  39. SEC_BEGIN_PROTOS
  40. /* destroy HMAC context */
  41. extern void
  42. HMAC_Destroy(HMACContext *cx, PRBool freeit);
  43. /* create HMAC context
  44. * hash_obj hash object from SECRawHashObjects[]
  45. * secret the secret with which the HMAC is performed.
  46. * secret_len the length of the secret.
  47. * isFIPS true if conforming to FIPS 198.
  48. *
  49. * NULL is returned if an error occurs.
  50. */
  51. extern HMACContext *
  52. HMAC_Create(const SECHashObject *hash_obj, const unsigned char *secret,
  53. unsigned int secret_len, PRBool isFIPS);
  54. /* like HMAC_Create, except caller allocates HMACContext. */
  55. SECStatus
  56. HMAC_Init(HMACContext *cx, const SECHashObject *hash_obj,
  57. const unsigned char *secret, unsigned int secret_len, PRBool isFIPS);
  58. /* reset HMAC for a fresh round */
  59. extern void
  60. HMAC_Begin(HMACContext *cx);
  61. /* update HMAC
  62. * cx HMAC Context
  63. * data the data to perform HMAC on
  64. * data_len the length of the data to process
  65. */
  66. extern void
  67. HMAC_Update(HMACContext *cx, const unsigned char *data, unsigned int data_len);
  68. /* Finish HMAC -- place the results within result
  69. * cx HMAC context
  70. * result buffer for resulting hmac'd data
  71. * result_len where the resultant hmac length is stored
  72. * max_result_len maximum possible length that can be stored in result
  73. */
  74. extern SECStatus
  75. HMAC_Finish(HMACContext *cx, unsigned char *result, unsigned int *result_len,
  76. unsigned int max_result_len);
  77. /* clone a copy of the HMAC state. this is usefult when you would
  78. * need to keep a running hmac but also need to extract portions
  79. * partway through the process.
  80. */
  81. extern HMACContext *
  82. HMAC_Clone(HMACContext *cx);
  83. SEC_END_PROTOS
  84. #endif