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openssl/doc/crypto/SHA256_Init.pod

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Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-27 19:31:26 +00:00
=pod
=head1 NAME
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
SHA1, SHA1_Init, SHA1_Update, SHA1_Final, SHA224, SHA224_Init, SHA224_Update,
SHA224_Final, SHA256, SHA256_Init, SHA256_Update, SHA256_Final, SHA384,
SHA384_Init, SHA384_Update, SHA384_Final, SHA512, SHA512_Init, SHA512_Update,
SHA512_Final - Secure Hash Algorithm
Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-27 19:31:26 +00:00
=head1 SYNOPSIS
#include <openssl/sha.h>
update md docs
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int SHA1_Init(SHA_CTX *c);
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
int SHA1_Update(SHA_CTX *c, const void *data, size_t len);
update md docs
2006-10-27 21:58:09 +00:00
int SHA1_Final(unsigned char *md, SHA_CTX *c);
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
unsigned char *SHA1(const unsigned char *d, size_t n,
unsigned char *md);
int SHA224_Init(SHA256_CTX *c);
int SHA224_Update(SHA256_CTX *c, const void *data, size_t len);
int SHA224_Final(unsigned char *md, SHA256_CTX *c);
unsigned char *SHA224(const unsigned char *d, size_t n,
unsigned char *md);
int SHA256_Init(SHA256_CTX *c);
int SHA256_Update(SHA256_CTX *c, const void *data, size_t len);
int SHA256_Final(unsigned char *md, SHA256_CTX *c);
unsigned char *SHA256(const unsigned char *d, size_t n,
unsigned char *md);
int SHA384_Init(SHA512_CTX *c);
int SHA384_Update(SHA512_CTX *c, const void *data, size_t len);
int SHA384_Final(unsigned char *md, SHA512_CTX *c);
unsigned char *SHA384(const unsigned char *d, size_t n,
unsigned char *md);
int SHA512_Init(SHA512_CTX *c);
int SHA512_Update(SHA512_CTX *c, const void *data, size_t len);
int SHA512_Final(unsigned char *md, SHA512_CTX *c);
unsigned char *SHA512(const unsigned char *d, size_t n,
unsigned char *md);
Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-27 19:31:26 +00:00
=head1 DESCRIPTION
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
Applications should use the higher level functions
Fix L<> content in manpages L<foo|foo> is sub-optimal If the xref is the same as the title, which is what we do, then you only need L<foo>. This fixes all 1457 occurrences in 349 files. Approximately. (And pod used to need both.) Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-08-17 19:21:33 +00:00
L<EVP_DigestInit(3)> etc. instead of calling the hash
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
functions directly.
Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-27 19:31:26 +00:00
SHA-1 (Secure Hash Algorithm) is a cryptographic hash function with a
160 bit output.
Update docs: corrections, turn buffer docs into manpage, fold SHA1 pages into one for improved readability, add lhash manpage
2000-01-30 22:16:47 +00:00
SHA1() computes the SHA-1 message digest of the B<n>
bytes at B<d> and places it in B<md> (which must have space for
SHA_DIGEST_LENGTH == 20 bytes of output). If B<md> is NULL, the digest
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
is placed in a static array. Note: setting B<md> to NULL is B<not thread safe>.
Update docs: corrections, turn buffer docs into manpage, fold SHA1 pages into one for improved readability, add lhash manpage
2000-01-30 22:16:47 +00:00
The following functions may be used if the message is not completely
stored in memory:
SHA1_Init() initializes a B<SHA_CTX> structure.
SHA1_Update() can be called repeatedly with chunks of the message to
be hashed (B<len> bytes at B<data>).
SHA1_Final() places the message digest in B<md>, which must have space
for SHA_DIGEST_LENGTH == 20 bytes of output, and erases the B<SHA_CTX>.
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
The SHA224, SHA256, SHA384 and SHA512 families of functions operate in the
same way as for the SHA1 functions. Note that SHA224 and SHA256 use a
B<SHA256_CTX> object instead of B<SHA_CTX>. SHA384 and SHA512 use B<SHA512_CTX>.
The buffer B<md> must have space for the output from the SHA variant being used
(defined by SHA224_DIGEST_LENGTH, SHA256_DIGEST_LENGTH, SHA384_DIGEST_LENGTH and
SHA512_DIGEST_LENGTH). Also note that, as for the SHA1() function above, the
SHA224(), SHA256(), SHA384() and SHA512() functions are not thread safe if
B<md> is NULL.
Refer to EVP_DigestInit() in the hash function descriptions.
2000-02-06 23:26:31 +00:00
Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-27 19:31:26 +00:00
The predecessor of SHA-1, SHA, is also implemented, but it should be
used only when backward compatibility is required.
Update docs: corrections, turn buffer docs into manpage, fold SHA1 pages into one for improved readability, add lhash manpage
2000-01-30 22:16:47 +00:00
=head1 RETURN VALUES
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
SHA1(), SHA224(), SHA256(), SHA384() and SHA512() return a pointer to the hash
Fix nits in pod files. Add doc-nit-check to help find future issues. Make podchecker be almost clean. Remove trailing whitespace. Tab expansion Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-05-20 12:11:46 +00:00
value.
Update docs: corrections, turn buffer docs into manpage, fold SHA1 pages into one for improved readability, add lhash manpage
2000-01-30 22:16:47 +00:00
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
SHA1_Init(), SHA1_Update() and SHA1_Final() and equivalent SHA224, SHA256,
SHA384 and SHA512 functions return 1 for success, 0 otherwise.
Update docs: corrections, turn buffer docs into manpage, fold SHA1 pages into one for improved readability, add lhash manpage
2000-01-30 22:16:47 +00:00
Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-27 19:31:26 +00:00
=head1 CONFORMING TO
Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety. Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-02-25 15:25:27 +00:00
US Federal Information Processing Standard FIPS PUB 180-4 (Secure Hash
Reference for SHA-1.
2000-01-31 09:02:30 +00:00
Standard),
ANSI X9.30
Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-27 19:31:26 +00:00
=head1 SEE ALSO
Fix L<> content in manpages L<foo|foo> is sub-optimal If the xref is the same as the title, which is what we do, then you only need L<foo>. This fixes all 1457 occurrences in 349 files. Approximately. (And pod used to need both.) Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-08-17 19:21:33 +00:00
L<EVP_DigestInit(3)>
Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-27 19:31:26 +00:00
Add copyright to manpages Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-05-18 15:44:05 +00:00
=head1 COPYRIGHT
Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
=cut
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