EVP_OpenUpdate man page on IRIX

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     /xlv3/openssl/0.9.7e-sgipl1/work/0.9.7e-sgipl1/openssl-
     0.9.7e/doc/crypto

     Page 1					    (printed 10/20/05)

     EVP_OpenInit(3)	   23/Sep/2000 (0.9.7e)	       EVP_OpenInit(3)

     NAME
	  EVP_OpenInit, EVP_OpenUpdate, EVP_OpenFinal - EVP envelope
	  decryption

     SYNOPSIS
	   #include <openssl/evp.h>

	   int EVP_OpenInit(EVP_CIPHER_CTX *ctx,EVP_CIPHER *type,unsigned char *ek,
			  int ekl,unsigned char *iv,EVP_PKEY *priv);
	   int EVP_OpenUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
		   int *outl, unsigned char *in, int inl);
	   int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out,
		   int *outl);

     DESCRIPTION
	  The EVP envelope routines are a high level interface to
	  envelope decryption. They decrypt a public key encrypted
	  symmetric key and then decrypt data using it.

	  EVP_OpenInit() initializes a cipher context ctx for
	  decryption with cipher type. It decrypts the encrypted
	  symmetric key of length ekl bytes passed in the ek parameter
	  using the private key priv.  The IV is supplied in the iv
	  parameter.

	  EVP_OpenUpdate() and EVP_OpenFinal() have exactly the same
	  properties as the EVP_DecryptUpdate() and EVP_DecryptFinal()
	  routines, as documented on the EVP_EncryptInit(3) manual
	  page.

     NOTES
	  It is possible to call EVP_OpenInit() twice in the same way
	  as EVP_DecryptInit(). The first call should have priv set to
	  NULL and (after setting any cipher parameters) it should be
	  called again with type set to NULL.

	  If the cipher passed in the type parameter is a variable
	  length cipher then the key length will be set to the value
	  of the recovered key length. If the cipher is a fixed length
	  cipher then the recovered key length must match the fixed
	  cipher length.

     RETURN VALUES
	  EVP_OpenInit() returns 0 on error or a non zero integer
	  (actually the recovered secret key size) if successful.

	  EVP_OpenUpdate() returns 1 for success or 0 for failure.

	  EVP_OpenFinal() returns 0 if the decrypt failed or 1 for
	  success.

     Page 1					    (printed 10/20/05)

     EVP_OpenInit(3)	   23/Sep/2000 (0.9.7e)	       EVP_OpenInit(3)

     SEE ALSO
	  evp(3), rand(3), EVP_EncryptInit(3), EVP_SealInit(3)

     HISTORY

     Page 2					    (printed 10/20/05)

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