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77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/*
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* shs - old Secure Hash Standard
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*
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**************************************************************************
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* This version implements the old Secure Hash Algorithm specified by *
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* (FIPS Pub 180). This version is kept for backward compatibility with *
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* shs version 2.10.1. See the shs utility for the new standard. *
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**************************************************************************
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*
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* Written 2 September 1992, Peter C. Gutmann.
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*
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* This file was Modified by:
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*
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* Landon Curt Noll (chongo@toad.com) chongo <was here> /\../\
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*
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* This code has been placed in the public domain. Please do not
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* copyright this code.
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*
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* LANDON CURT NOLL DISCLAIMS ALL WARRANTIES WITH REGARD TO
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MER-
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* CHANTABILITY AND FITNESS. IN NO EVENT SHALL LANDON CURT
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* NOLL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#if !defined(__SHS_H__)
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#define __SHS_H__
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/* SHS_CHUNKSIZE must be a power of 2 - fixed value defined by the algorithm */
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#define SHS_CHUNKSIZE (1<<6)
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#define SHS_CHUNKWORDS (SHS_CHUNKSIZE/sizeof(USB32))
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/* SHS_DIGESTSIZE is a the length of the digest as defined by the algorithm */
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#define SHS_DIGESTSIZE (20)
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#define SHS_DIGESTWORDS (SHS_DIGESTSIZE/sizeof(USB32))
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/* SHS_LOW - where low 32 bits of 64 bit count is stored during final */
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#define SHS_LOW 15
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/* SHS_HIGH - where high 32 bits of 64 bit count is stored during final */
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#define SHS_HIGH 14
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/*
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* The structure for storing SHS info
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*
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* We will assume that bit count is a multiple of 8.
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*/
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typedef struct {
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USB32 digest[SHS_DIGESTWORDS]; /* message digest */
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USB32 countLo; /* 64 bit count: bits 3-34 */
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USB32 countHi; /* 64 bit count: bits 35-63 */
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USB32 datalen; /* length of data in data */
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USB32 data[SHS_CHUNKWORDS]; /* SHS chunk buffer */
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} SHS_INFO;
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/*
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* SHSCOUNT(SHS_INFO*, USB32) - update the 64 bit count in an SHS_INFO
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*
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* We will count bytes and convert to bit count during the final
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* transform. This assumes that the count is < 2^32.
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*/
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#define SHSCOUNT(shsinfo, count) { \
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USB32 tmp_countLo; \
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tmp_countLo = (shsinfo)->countLo; \
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if (((shsinfo)->countLo += (count)) < tmp_countLo) { \
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(shsinfo)->countHi++; \
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} \
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}
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#endif /* !__SHS_H__ */
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