diff options
author | Ulf Möller <ulf@openssl.org> | 2000-01-23 22:06:24 +0000 |
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committer | Ulf Möller <ulf@openssl.org> | 2000-01-23 22:06:24 +0000 |
commit | dd8dec69b825c9fdafc26a200961702d850496b5 (patch) | |
tree | b7d7ca7365271c822226e1ddc6a4fd68c72273ad /doc/crypto/BN_new.pod | |
parent | ce052b6c3b18d4ab5f74990d82d09827a6014823 (diff) |
Document the BN library.
Diffstat (limited to 'doc/crypto/BN_new.pod')
-rw-r--r-- | doc/crypto/BN_new.pod | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/doc/crypto/BN_new.pod b/doc/crypto/BN_new.pod new file mode 100644 index 0000000000..ee95645751 --- /dev/null +++ b/doc/crypto/BN_new.pod @@ -0,0 +1,53 @@ +=pod + +=head1 NAME + +BN_new, BN_init, BN_clear, BN_free, BN_clear_free - allocate and free BIGNUMs + +=head1 SYNOPSIS + + #include <openssl/bn.h> + + BIGNUM *BN_new(void); + + void BN_init(BIGNUM *); + + void BN_clear(BIGNUM *a); + + void BN_free(BIGNUM *a); + + void BN_clear_free(BIGNUM *a); + +=head1 DESCRIPTION + +BN_new() allocated and initializes a B<BIGNUM> structure. BN_init() +initializes an existing uninitialized B<BIGNUM>. + +BN_clear() is used to destroy sensitive data such as keys when they +are no longer needed. It erases the memory used by B<a> and sets it +to the value 0. + +BN_free() frees the components of the B<BIGNUM>, and if it was created +by BN_new(), also the structure itself. BN_clear_free() additionally +overwrites the data before the memory is returned to the system. + +=head1 RETURN VALUES + +BN_new() returns a pointer to the B<BIGNUM>. If the allocation fails, +it returns B<NULL> and sets an error code that can be obtained +by ERR_get_error(3). + +BN_init(), BN_clear(), BN_free() and BN_clear_free() have no return +values. + +=head1 SEE ALSO + +bn(3), err(3) + +=head1 HISTORY + +BN_new(), BN_clear(), BN_free() and BN_clear_free() are availabe in +all versions on SSLeay and OpenSSL. BN_init() was added in SSLeay +0.9.1b. + +=cut |