diff options
Diffstat (limited to 'cipher')
| -rw-r--r-- | cipher/sha1.c | 38 | ||||
| -rw-r--r-- | cipher/sha1.h | 3 |
2 files changed, 41 insertions, 0 deletions
diff --git a/cipher/sha1.c b/cipher/sha1.c index 19e75b23..d15c2a29 100644 --- a/cipher/sha1.c +++ b/cipher/sha1.c @@ -130,6 +130,17 @@ sha1_init (void *context, unsigned int flags) (void)features; } +/* + * Initialize the context HD. This is used to prepare the use of + * _gcry_sha1_mixblock. WARNING: This is a special purpose function + * for exclusive use by random-csprng.c. + */ +void +_gcry_sha1_mixblock_init (SHA1_CONTEXT *hd) +{ + sha1_init (hd, 0); +} + /* Round function macros. */ #define K1 0x5A827999L @@ -354,6 +365,33 @@ transform (void *ctx, const unsigned char *data, size_t nblks) } +/* + * Apply the SHA-1 transform function on the buffer BLOCKOF64BYTE + * which must have a length 64 bytes. BLOCKOF64BYTE must be 32-bit + * aligned. Updates the 20 bytes in BLOCKOF64BYTE with its mixed + * content. Returns the number of bytes which should be burned on the + * stack. You need to use _gcry_sha1_mixblock_init to initialize the + * context. + * WARNING: This is a special purpose function for exclusive use by + * random-csprng.c. + */ +unsigned int +_gcry_sha1_mixblock (SHA1_CONTEXT *hd, void *blockof64byte) +{ + u32 *p = blockof64byte; + unsigned int nburn; + + nburn = transform (hd, blockof64byte, 1); + p[0] = hd->h0; + p[1] = hd->h1; + p[2] = hd->h2; + p[3] = hd->h3; + p[4] = hd->h4; + + return nburn; +} + + /* The routine final terminates the computation and * returns the digest. * The handle is prepared for a new cycle, but adding bytes to the diff --git a/cipher/sha1.h b/cipher/sha1.h index c023e15c..6b87631c 100644 --- a/cipher/sha1.h +++ b/cipher/sha1.h @@ -33,4 +33,7 @@ typedef struct } SHA1_CONTEXT; +void _gcry_sha1_mixblock_init (SHA1_CONTEXT *hd); +unsigned int _gcry_sha1_mixblock (SHA1_CONTEXT *hd, void *blockof64byte); + #endif /*GCRY_SHA1_H*/ |