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@ -1,4 +1,4 @@ |
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.\" $OpenBSD: sha2.3,v 1.1 2003/05/08 23:34:55 millert Exp $ |
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.\" $OpenBSD: sha2.3,v 1.2 2003/05/30 19:55:03 jmc Exp $ |
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.\" |
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.\" Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com> |
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.\" All rights reserved. |
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@ -82,7 +82,7 @@ The SHA2 functions implement the NIST Secure Hash Standard, |
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FIPS PUB 180-2. |
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The SHA2 functions are used to generate a condensed representation of a |
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message called a message digest, suitable for use as a digital signature. |
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There are three families of functions, with names corresponding to |
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There are three families of functions, with names corresponding to |
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the number of bits in the resulting message digest. |
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The SHA-256 functions are limited to processing a message of less |
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than 2^64 bits as input. |
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@ -195,23 +195,6 @@ char *buf = "abc"; |
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printf("0x%s\en", SHA256_Data(buf, strlen(buf), output)); |
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.Ed |
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.Sh CAVEATS |
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This implementation of the Secure Hash Standard has not been validated by |
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NIST and as such is not in official compliance with the standard. |
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.Pp |
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If a message digest is to be copied to a multi-byte type (ie: |
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an array of five 32-bit integers) it will be necessary to |
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perform byte swapping on little endian machines such as the i386, alpha, |
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and vax. |
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.Sh AUTHORS |
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This implementation of the SHA fucntions was written by Aaron D. Gifford. |
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.Pp |
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The |
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.Fn SHA256_End , |
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.Fn SHA256_File , |
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and |
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.Fn SHA256_Data |
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helper functions are derived from code written by Poul-Henning Kamp. |
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.Sh SEE ALSO |
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.Xr md4 3 , |
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.Xr md5 3 , |
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@ -224,3 +207,20 @@ helper functions are derived from code written by Poul-Henning Kamp. |
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.Sh HISTORY |
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The SHA2 functions appeared in |
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.Ox 3.4 . |
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.Sh AUTHORS |
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This implementation of the SHA fucntions was written by Aaron D. Gifford. |
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.Pp |
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The |
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.Fn SHA256_End , |
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.Fn SHA256_File , |
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and |
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.Fn SHA256_Data |
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helper functions are derived from code written by Poul-Henning Kamp. |
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.Sh CAVEATS |
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This implementation of the Secure Hash Standard has not been validated by |
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NIST and as such is not in official compliance with the standard. |
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.Pp |
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If a message digest is to be copied to a multi-byte type (ie: |
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an array of five 32-bit integers) it will be necessary to |
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perform byte swapping on little endian machines such as the i386, alpha, |
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and vax. |