OpenSSL 0.9.5 merge

*warning* this bumps shared lib minors for libssl and libcrypto from 2.1 to 2.2
if you are using the ssl26 packages for ssh and other things to work you will
need to get new ones (see ~beck/libsslsnap/<arch>) on cvs or ~beck/src-patent.tar.gz on cvs

1 files changed, 197 insertions, 0 deletions

diff --git a/src/lib/libcrypto/doc/EVP_DigestInit.pod b/src/lib/libcrypto/doc/EVP_DigestInit.pod
new file mode 100644
index 0000000000..345b1ddfa7
--- /dev/null
+++ b/src/lib/libcrypto/doc/EVP_DigestInit.pod
@@ -0,0 +1,197 @@
+=pod
+
+=head1 NAME
+
+EVP_DigestInit, EVP_DigestUpdate, EVP_DigestFinal - EVP digest routines
+
+=head1 SYNOPSIS
+
+ #include <openssl/evp.h>
+
+ void EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type);
+ void EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *d, unsigned int cnt);
+ void EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md,
+        unsigned int *s);
+
+ #define EVP_MAX_MD_SIZE (16+20) /* The SSLv3 md5+sha1 type */
+
+ int EVP_MD_CTX_copy(EVP_MD_CTX *out,EVP_MD_CTX *in);  
+
+ #define EVP_MD_type(e)                 ((e)->type)
+ #define EVP_MD_pkey_type(e)            ((e)->pkey_type)
+ #define EVP_MD_size(e)                 ((e)->md_size)
+ #define EVP_MD_block_size(e)           ((e)->block_size)
+
+ #define EVP_MD_CTX_md(e)               (e)->digest)
+ #define EVP_MD_CTX_size(e)             EVP_MD_size((e)->digest)
+ #define EVP_MD_CTX_block_size(e)       EVP_MD_block_size((e)->digest)
+ #define EVP_MD_CTX_type(e)             EVP_MD_type((e)->digest)
+
+ EVP_MD *EVP_md_null(void);
+ EVP_MD *EVP_md2(void);
+ EVP_MD *EVP_md5(void);
+ EVP_MD *EVP_sha(void);
+ EVP_MD *EVP_sha1(void);
+ EVP_MD *EVP_dss(void);
+ EVP_MD *EVP_dss1(void);
+ EVP_MD *EVP_mdc2(void);
+ EVP_MD *EVP_ripemd160(void);
+
+ const EVP_MD *EVP_get_digestbyname(const char *name);
+ #define EVP_get_digestbynid(a) EVP_get_digestbyname(OBJ_nid2sn(a))
+ #define EVP_get_digestbyobj(a) EVP_get_digestbynid(OBJ_obj2nid(a))
+
+=head1 DESCRIPTION
+
+The EVP digest routines are a high level interface to message digests.
+
+EVP_DigestInit() initialises a digest context B<ctx> to use a digest
+B<type>: this will typically be supplied by a function such as
+EVP_sha1().
+
+EVP_DigestUpdate() hashes B<cnt> bytes of data at B<d> into the
+digest context B<ctx>. This funtion can be called several times on the
+same B<ctx> to hash additional data.
+
+EVP_DigestFinal() retrieves the digest value from B<ctx> and places
+it in B<md>. If the B<s> parameter is not NULL then the number of
+bytes of data written (i.e. the length of the digest) will be written
+to the integer at B<s>, at most B<EVP_MAX_MD_SIZE> bytes will be written.
+After calling EVP_DigestFinal() no additional calls to EVP_DigestUpdate()
+can be made, but EVP_DigestInit() can be called to initialiase a new
+digest operation.
+
+EVP_MD_CTX_copy() can be used to copy the message digest state from
+B<in> to B<out>. This is useful if large amounts of data are to be
+hashed which only differ in the last few bytes.
+
+EVP_MD_size() and EVP_MD_CTX_size() return the size of the message digest
+when passed an B<EVP_MD> or an B<EVP_MD_CTX> structure, i.e. the size of the
+hash.
+
+EVP_MD_block_size() and EVP_MD_CTX_block_size() return the block size of the
+message digest when passed an B<EVP_MD> or an B<EVP_MD_CTX> structure.
+
+EVP_MD_type() and EVP_MD_CTX_type() return the NID of the OBJECT IDENTIFIER
+representing the given message digest when passed an B<EVP_MD> structure.
+For example EVP_MD_type(EVP_sha1()) returns B<NID_sha1>. This function is
+normally used when setting ASN1 OIDs.
+
+EVP_MD_CTX_md() returns the B<EVP_MD> structure corresponding to the passed
+B<EVP_MD_CTX>.
+
+EVP_MD_pkey_type() returns the NID of the public key signing algorithm associated
+with this digest. For example EVP_sha1() is associated with RSA so this will
+return B<NID_sha1WithRSAEncryption>. This "link" between digests and signature
+algorithms may not be retained in future versions of OpenSSL.
+
+EVP_md2(), EVP_md5(), EVP_sha(), EVP_sha1(), EVP_mdc2() and EVP_ripemd160()
+return B<EVP_MD> structures for the MD2, MD5, SHA, SHA1, MDC2 and RIPEMD160 digest
+algorithms respectively. The associated signature algorithm is RSA in each case.
+
+EVP_dss() and EVP_dss1() return B<EVP_MD> structures for SHA and SHA1 digest
+algorithms but using DSS (DSA) for the signature algorithm.
+
+EVP_md_null() is a "null" message digest that does nothing: i.e. the hash it
+returns is of zero length.
+
+EVP_get_digestbyname(), EVP_get_digestbynid() and EVP_get_digestbyobj()
+return an B<EVP_MD> structure when passed a digest name, a digest NID or
+an ASN1_OBJECT structure respectively. The digest table must be initialised
+using, for example, OpenSSL_add_all_digests() for these functions to work.
+
+=head1 RETURN VALUES
+
+EVP_DigestInit(), EVP_DigestUpdate() and EVP_DigestFinal() do not return values.
+
+EVP_MD_CTX_copy() returns 1 if successful or 0 for failure.
+
+EVP_MD_type(), EVP_MD_pkey_type() and EVP_MD_type() return the NID of the
+corresponding OBJECT IDENTIFIER or NID_undef if none exists.
+
+EVP_MD_size(), EVP_MD_block_size(), EVP_MD_CTX_size(e), EVP_MD_size(),
+EVP_MD_CTX_block_size() and EVP_MD_block_size() return the digest or block
+size in bytes.
+
+EVP_md_null(), EVP_md2(), EVP_md5(), EVP_sha(), EVP_sha1(), EVP_dss(),
+EVP_dss1(), EVP_mdc2() and EVP_ripemd160() return pointers to the
+corresponding EVP_MD structures.
+
+EVP_get_digestbyname(), EVP_get_digestbynid() and EVP_get_digestbyobj()
+return either an B<EVP_MD> structure or NULL if an error occurs.
+
+=head1 NOTES
+
+The B<EVP> interface to message digests should almost always be used in
+preference to the low level interfaces. This is because the code then becomes
+transparent to the digest used and much more flexible.
+
+SHA1 is the digest of choice for new applications. The other digest algorithms
+are still in common use.
+
+=head1 EXAMPLE
+
+This example digests the data "Test Message\n" and "Hello World\n", using the
+digest name passed on the command line.
+
+ #include <stdio.h>
+ #include <openssl/evp.h>
+
+ main(int argc, char *argv[])
+ {
+ EVP_MD_CTX mdctx;
+ const EVP_MD *md;
+ char mess1[] = "Test Message\n";
+ char mess2[] = "Hello World\n";
+ unsigned char md_value[EVP_MAX_MD_SIZE];
+ int md_len, i;
+
+ OpenSSL_add_all_digests();
+
+ if(!argv[1]) {
+        printf("Usage: mdtest digestname\n");
+        exit(1);
+ }
+
+ md = EVP_get_digestbyname(argv[1]);
+
+ if(!md) {
+        printf("Unknown message digest %s\n", argv[1]);
+        exit(1);
+ }
+
+ EVP_DigestInit(&mdctx, md);
+ EVP_DigestUpdate(&mdctx, mess1, strlen(mess1));
+ EVP_DigestUpdate(&mdctx, mess2, strlen(mess2));
+ EVP_DigestFinal(&mdctx, md_value, &md_len);
+
+ printf("Digest is: ");
+ for(i = 0; i < md_len; i++) printf("%02x", md_value[i]);
+ printf("\n");
+ }
+
+=head1 BUGS
+
+Several of the functions do not return values: maybe they should. Although the
+internal digest operations will never fail some future hardware based operations
+might.
+
+The link between digests and signing algorithms results in a situation where
+EVP_sha1() must be used with RSA and EVP_dss1() must be used with DSS
+even though they are identical digests.
+
+The size of an B<EVP_MD_CTX> structure is determined at compile time: this results
+in code that must be recompiled if the size of B<EVP_MD_CTX> increases.
+
+=head1 SEE ALSO
+
+L<evp(3)|evp(3)>, L<hmac(3)|hmac(3)>, L<md2(3)|md2(3)>,
+L<md5(3)|md5(3)>, L<mdc2(3)|mdc2(3)>, L<ripemd(3)|ripemd(3)>,
+L<sha(3)|sha(3)>, L<digest(1)|digest(1)>
+
+=head1 HISTORY
+
+EVP_DigestInit(), EVP_DigestUpdate() and EVP_DigestFinal() are
+available in all versions of SSLeay and OpenSSL.
+
+=cut