diff options
Diffstat (limited to 'crypto/openssl/doc/crypto/EVP_SealInit.pod')
| -rw-r--r-- | crypto/openssl/doc/crypto/EVP_SealInit.pod | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/crypto/openssl/doc/crypto/EVP_SealInit.pod b/crypto/openssl/doc/crypto/EVP_SealInit.pod index 1579d11..0451eb6 100644 --- a/crypto/openssl/doc/crypto/EVP_SealInit.pod +++ b/crypto/openssl/doc/crypto/EVP_SealInit.pod @@ -10,9 +10,9 @@ EVP_SealInit, EVP_SealUpdate, EVP_SealFinal - EVP envelope encryption int EVP_SealInit(EVP_CIPHER_CTX *ctx, EVP_CIPHER *type, unsigned char **ek, int *ekl, unsigned char *iv,EVP_PKEY **pubk, int npubk); - void EVP_SealUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, + int EVP_SealUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, unsigned char *in, int inl); - void EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, + int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl); =head1 DESCRIPTION @@ -22,7 +22,7 @@ encryption. They generate a random key and then "envelope" it by using public key encryption. Data can then be encrypted using this key. -EVP_SealInit() initialises a cipher context B<ctx> for encryption +EVP_SealInit() initializes a cipher context B<ctx> for encryption with cipher B<type> using a random secret key and IV supplied in the B<iv> parameter. B<type> is normally supplied by a function such as EVP_des_cbc(). The secret key is encrypted using one or more public @@ -41,9 +41,10 @@ page. =head1 RETURN VALUES -EVP_SealInit() returns -1 on error or B<npubk> if successful. +EVP_SealInit() returns 0 on error or B<npubk> if successful. -EVP_SealUpdate() and EVP_SealFinal() do not return values. +EVP_SealUpdate() and EVP_SealFinal() return 1 for success and 0 for +failure. =head1 NOTES @@ -59,9 +60,14 @@ but symmetric encryption is fast. So symmetric encryption is used for bulk encryption and the small random symmetric key used is transferred using public key encryption. +It is possible to call EVP_SealInit() twice in the same way as +EVP_EncryptInit(). The first call should have B<npubk> set to 0 +and (after setting any cipher parameters) it should be called again +with B<type> set to NULL. + =head1 SEE ALSO -L<evp(3)|evp(3)>,L<rand(3)|rand(3)> +L<evp(3)|evp(3)>, L<rand(3)|rand(3)>, L<EVP_EncryptInit(3)|EVP_EncryptInit(3)>, L<EVP_OpenInit(3)|EVP_OpenInit(3)> |
