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Diffstat (limited to 'crypto/openssl/doc/crypto/hmac.pod')
-rw-r--r-- | crypto/openssl/doc/crypto/hmac.pod | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/crypto/openssl/doc/crypto/hmac.pod b/crypto/openssl/doc/crypto/hmac.pod deleted file mode 100644 index 45b6108c3935..000000000000 --- a/crypto/openssl/doc/crypto/hmac.pod +++ /dev/null @@ -1,75 +0,0 @@ -=pod - -=head1 NAME - -HMAC, HMAC_Init, HMAC_Update, HMAC_Final - HMAC message authentication code - -=head1 SYNOPSIS - - #include <openssl/hmac.h> - - unsigned char *HMAC(const EVP_MD *evp_md, const void *key, - int key_len, const unsigned char *d, int n, - unsigned char *md, unsigned int *md_len); - - void HMAC_Init(HMAC_CTX *ctx, const void *key, int key_len, - const EVP_MD *md); - void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len); - void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len); - - void HMAC_cleanup(HMAC_CTX *ctx); - -=head1 DESCRIPTION - -HMAC is a MAC (message authentication code), i.e. a keyed hash -function used for message authentication, which is based on a hash -function. - -HMAC() computes the message authentication code of the B<n> bytes at -B<d> using the hash function B<evp_md> and the key B<key> which is -B<key_len> bytes long. - -It places the result in B<md> (which must have space for the output of -the hash function, which is no more than B<EVP_MAX_MD_SIZE> bytes). -If B<md> is NULL, the digest is placed in a static array. The size of -the output is placed in B<md_len>, unless it is B<NULL>. - -B<evp_md> can be EVP_sha1(), EVP_ripemd160() etc. -B<key> and B<evp_md> may be B<NULL> if a key and hash function have -been set in a previous call to HMAC_Init() for that B<HMAC_CTX>. - -HMAC_cleanup() erases the key and other data from the B<HMAC_CTX>. - -The following functions may be used if the message is not completely -stored in memory: - -HMAC_Init() initializes a B<HMAC_CTX> structure to use the hash -function B<evp_md> and the key B<key> which is B<key_len> bytes long. - -HMAC_Update() can be called repeatedly with chunks of the message to -be authenticated (B<len> bytes at B<data>). - -HMAC_Final() places the message authentication code in B<md>, which -must have space for the hash function output. - -=head1 RETURN VALUES - -HMAC() returns a pointer to the message authentication code. - -HMAC_Init(), HMAC_Update(), HMAC_Final() and HMAC_cleanup() do not -return values. - -=head1 CONFORMING TO - -RFC 2104 - -=head1 SEE ALSO - -L<sha(3)|sha(3)>, L<evp(3)|evp(3)> - -=head1 HISTORY - -HMAC(), HMAC_Init(), HMAC_Update(), HMAC_Final() and HMAC_cleanup() -are available since SSLeay 0.9.0. - -=cut |