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-=pod
-
-=head1 NAME
-
-crypto - OpenSSL cryptographic library
-
-=head1 SYNOPSIS
-
-=head1 DESCRIPTION
-
-The OpenSSL B<crypto> library implements a wide range of cryptographic
-algorithms used in various Internet standards. The services provided
-by this library are used by the OpenSSL implementations of SSL, TLS
-and S/MIME, and they have also been used to implement SSH, OpenPGP, and
-other cryptographic standards.
-
-=head1 OVERVIEW
-
-B<libcrypto> consists of a number of sub-libraries that implement the
-individual algorithms.
-
-The functionality includes symmetric encryption, public key
-cryptography and key agreement, certificate handling, cryptographic
-hash functions and a cryptographic pseudo-random number generator.
-
-=over 4
-
-=item SYMMETRIC CIPHERS
-
-L<blowfish(3)|blowfish(3)>, L<cast(3)|cast(3)>, L<des(3)|des(3)>,
-L<idea(3)|idea(3)>, L<rc2(3)|rc2(3)>, L<rc4(3)|rc4(3)>, L<rc5(3)|rc5(3)>
-
-=item PUBLIC KEY CRYPTOGRAPHY AND KEY AGREEMENT
-
-L<dsa(3)|dsa(3)>, L<dh(3)|dh(3)>, L<rsa(3)|rsa(3)>
-
-=item CERTIFICATES
-
-L<x509(3)|x509(3)>, L<x509v3(3)|x509v3(3)>
-
-=item AUTHENTICATION CODES, HASH FUNCTIONS
-
-L<hmac(3)|hmac(3)>, L<md2(3)|md2(3)>, L<md4(3)|md4(3)>,
-L<md5(3)|md5(3)>, L<mdc2(3)|mdc2(3)>, L<ripemd(3)|ripemd(3)>,
-L<sha(3)|sha(3)>
-
-=item AUXILIARY FUNCTIONS
-
-L<err(3)|err(3)>, L<threads(3)|threads(3)>, L<rand(3)|rand(3)>,
-L<OPENSSL_VERSION_NUMBER(3)|OPENSSL_VERSION_NUMBER(3)>
-
-=item INPUT/OUTPUT, DATA ENCODING
-
-L<asn1(3)|asn1(3)>, L<bio(3)|bio(3)>, L<evp(3)|evp(3)>, L<pem(3)|pem(3)>,
-L<pkcs7(3)|pkcs7(3)>, L<pkcs12(3)|pkcs12(3)>
-
-=item INTERNAL FUNCTIONS
-
-L<bn(3)|bn(3)>, L<buffer(3)|buffer(3)>, L<ec(3)|ec(3)>, L<lhash(3)|lhash(3)>,
-L<objects(3)|objects(3)>, L<stack(3)|stack(3)>,
-L<txt_db(3)|txt_db(3)>
-
-=back
-
-=head1 NOTES
-
-Some of the newer functions follow a naming convention using the numbers
-B<0> and B<1>. For example the functions:
-
- int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev);
- int X509_add1_trust_object(X509 *x, ASN1_OBJECT *obj);
-
-The B<0> version uses the supplied structure pointer directly
-in the parent and it will be freed up when the parent is freed.
-In the above example B<crl> would be freed but B<rev> would not.
-
-The B<1> function uses a copy of the supplied structure pointer
-(or in some cases increases its link count) in the parent and
-so both (B<x> and B<obj> above) should be freed up.
-
-=head1 SEE ALSO
-
-L<openssl(1)|openssl(1)>, L<ssl(3)|ssl(3)>
-
-=cut