wimboot/wimboot-2.7.3/src/sha1.h

   1 #ifndef _SHA1_H
   2 #define _SHA1_H
   3
   4 /** @file
   5  *
   6  * SHA-1 algorithm
   7  *
   8  */
   9
  10 #include <stdint.h>
  11
  12 /** An SHA-1 digest */
  13 struct sha1_digest {
  14         /** Hash output */
  15         uint32_t h[5];
  16 };
  17
  18 /** An SHA-1 data block */
  19 union sha1_block {
  20         /** Raw bytes */
  21         uint8_t byte[64];
  22         /** Raw dwords */
  23         uint32_t dword[16];
  24         /** Final block structure */
  25         struct {
  26                 /** Padding */
  27                 uint8_t pad[56];
  28                 /** Length in bits */
  29                 uint64_t len;
  30         } final;
  31 };
  32
  33 /** SHA-1 digest and data block
  34  *
  35  * The order of fields within this structure is designed to minimise
  36  * code size.
  37  */
  38 struct sha1_digest_data {
  39         /** Digest of data already processed */
  40         struct sha1_digest digest;
  41         /** Accumulated data */
  42         union sha1_block data;
  43 } __attribute__ (( packed ));
  44
  45 /** SHA-1 digest and data block */
  46 union sha1_digest_data_dwords {
  47         /** Digest and data block */
  48         struct sha1_digest_data dd;
  49         /** Raw dwords */
  50         uint32_t dword[ sizeof ( struct sha1_digest_data ) /
  51                         sizeof ( uint32_t ) ];
  52 };
  53
  54 /** An SHA-1 context */
  55 struct sha1_context {
  56         /** Amount of accumulated data */
  57         size_t len;
  58         /** Digest and accumulated data */
  59         union sha1_digest_data_dwords ddd;
  60 } __attribute__ (( packed ));
  61
  62 /** SHA-1 context size */
  63 #define SHA1_CTX_SIZE sizeof ( struct sha1_context )
  64
  65 /** SHA-1 digest size */
  66 #define SHA1_DIGEST_SIZE sizeof ( struct sha1_digest )
  67
  68 extern void sha1_init ( void *ctx );
  69 extern void sha1_update ( void *ctx, const void *data, size_t len );
  70 extern void sha1_final ( void *ctx, void *out );
  71
  72 #endif /* _SHA1_H */