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  1. sha.1.man
  2. sha.3.man


1. sha.1.man

Manpage of DGST

DGST

Section: OpenSSL (1)
Updated: 2004-12-03
Index Return to Main Contents
 

NAME

dgst, md5, md4, md2, sha1, sha, mdc2, ripemd160 - message digests  

SYNOPSIS

openssl dgst [-md5|-md4|-md2|-sha1|-sha|-mdc2|-ripemd160|-dss1] [-c] [-d] [-hex] [-binary] [-out filename] [-sign filename] [-passin arg] [-verify filename] [-prverify filename] [-signature filename] [file...]

[md5|md4|md2|sha1|sha|mdc2|ripemd160] [-c] [-d] [file...]  

DESCRIPTION

The digest functions output the message digest of a supplied file or files in hexadecimal form. They can also be used for digital signing and verification.  

OPTIONS

-c
print out the digest in two digit groups separated by colons, only relevant if hex format output is used.
-d
print out BIO debugging information.
-hex
digest is to be output as a hex dump. This is the default case for a ``normal'' digest as opposed to a digital signature.
-binary
output the digest or signature in binary form.
-out filename
filename to output to, or standard output by default.
-sign filename
digitally sign the digest using the private key in ``filename''.
-passin arg
the private key password source. For more information about the format of arg see the PASS PHRASE ARGUMENTS section in openssl(1).
-verify filename
verify the signature using the the public key in ``filename''. The output is either ``Verification OK'' or ``Verification Failure''.
-prverify filename
verify the signature using the the private key in ``filename''.
-signature filename
the actual signature to verify.
-rand file(s)
a file or files containing random data used to seed the random number generator, or an EGD socket (see RAND_egd(3)). Multiple files can be specified separated by a OS-dependent character. The separator is ; for MS-Windows, , for OpenVMS, and : for all others.
file...
file or files to digest. If no files are specified then standard input is used.
 

NOTES

The digest of choice for all new applications is SHA1. Other digests are however still widely used.

If you wish to sign or verify data using the DSA algorithm then the dss1 digest must be used.

A source of random numbers is required for certain signing algorithms, in particular DSA.

The signing and verify options should only be used if a single file is being signed or verified.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
NOTES

This document was created by man2html using the manual pages.
Time: 17:32:24 GMT, October 23, 2013

2. sha.3.man

Manpage of sha

sha

Section: OpenSSL (3)
Updated: 2000-02-25
Index Return to Main Contents
 

NAME

SHA1, SHA1_Init, SHA1_Update, SHA1_Final - Secure Hash Algorithm  

SYNOPSIS

 #include <openssl/sha.h>

 unsigned char *SHA1(const unsigned char *d, unsigned long n,
                  unsigned char *md);

 void SHA1_Init(SHA_CTX *c);
 void SHA1_Update(SHA_CTX *c, const void *data,
                  unsigned long len);
 void SHA1_Final(unsigned char *md, SHA_CTX *c);

 

DESCRIPTION

SHA-1 (Secure Hash Algorithm) is a cryptographic hash function with a 160 bit output.

SHA1() computes the SHA-1 message digest of the n bytes at d and places it in md (which must have space for SHA_DIGEST_LENGTH == 20 bytes of output). If md is NULL, the digest is placed in a static array.

The following functions may be used if the message is not completely stored in memory:

SHA1_Init() initializes a SHA_CTX structure.

SHA1_Update() can be called repeatedly with chunks of the message to be hashed (len bytes at data).

SHA1_Final() places the message digest in md, which must have space for SHA_DIGEST_LENGTH == 20 bytes of output, and erases the SHA_CTX.

Applications should use the higher level functions EVP_DigestInit(3) etc. instead of calling the hash functions directly.

The predecessor of SHA-1, SHA, is also implemented, but it should be used only when backward compatibility is required.  

RETURN VALUES

SHA1() returns a pointer to the hash value.

SHA1_Init(), SHA1_Update() and SHA1_Final() do not return values.  

CONFORMING TO

SHA: US Federal Information Processing Standard FIPS PUB 180 (Secure Hash Standard), SHA-1: US Federal Information Processing Standard FIPS PUB 180-1 (Secure Hash Standard), ANSI X9.30  

SEE ALSO

ripemd(3), hmac(3), EVP_DigestInit(3)  

HISTORY

SHA1(), SHA1_Init(), SHA1_Update() and SHA1_Final() are available in all versions of SSLeay and OpenSSL.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
CONFORMING TO
SEE ALSO
HISTORY

This document was created by man2html using the manual pages.
Time: 17:32:24 GMT, October 23, 2013

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