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Diffstat (limited to 'doc/crypto/EVP_PKEY_keygen.pod')
| -rw-r--r-- | doc/crypto/EVP_PKEY_keygen.pod | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/doc/crypto/EVP_PKEY_keygen.pod b/doc/crypto/EVP_PKEY_keygen.pod deleted file mode 100644 index fd431ace6dcc..000000000000 --- a/doc/crypto/EVP_PKEY_keygen.pod +++ /dev/null @@ -1,161 +0,0 @@ -=pod - -=head1 NAME - -EVP_PKEY_keygen_init, EVP_PKEY_keygen, EVP_PKEY_paramgen_init, EVP_PKEY_paramgen, EVP_PKEY_CTX_set_cb, EVP_PKEY_CTX_get_cb, EVP_PKEY_CTX_get_keygen_info, EVP_PKEVP_PKEY_CTX_set_app_data, EVP_PKEY_CTX_get_app_data - key and parameter generation functions - -=head1 SYNOPSIS - - #include <openssl/evp.h> - - int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx); - int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey); - int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx); - int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey); - - typedef int EVP_PKEY_gen_cb(EVP_PKEY_CTX *ctx); - - void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb); - EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx); - - int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx); - - void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data); - void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx); - -=head1 DESCRIPTION - -The EVP_PKEY_keygen_init() function initializes a public key algorithm -context using key B<pkey> for a key genration operation. - -The EVP_PKEY_keygen() function performs a key generation operation, the -generated key is written to B<ppkey>. - -The functions EVP_PKEY_paramgen_init() and EVP_PKEY_paramgen() are similar -except parameters are generated. - -The function EVP_PKEY_set_cb() sets the key or parameter generation callback -to B<cb>. The function EVP_PKEY_CTX_get_cb() returns the key or parameter -generation callback. - -The function EVP_PKEY_CTX_get_keygen_info() returns parameters associated -with the generation operation. If B<idx> is -1 the total number of -parameters available is returned. Any non negative value returns the value of -that parameter. EVP_PKEY_CTX_gen_keygen_info() with a non-negative value for -B<idx> should only be called within the generation callback. - -If the callback returns 0 then the key genration operation is aborted and an -error occurs. This might occur during a time consuming operation where -a user clicks on a "cancel" button. - -The functions EVP_PKEY_CTX_set_app_data() and EVP_PKEY_CTX_get_app_data() set -and retrieve an opaque pointer. This can be used to set some application -defined value which can be retrieved in the callback: for example a handle -which is used to update a "progress dialog". - -=head1 NOTES - -After the call to EVP_PKEY_keygen_init() or EVP_PKEY_paramgen_init() algorithm -specific control operations can be performed to set any appropriate parameters -for the operation. - -The functions EVP_PKEY_keygen() and EVP_PKEY_paramgen() can be called more than -once on the same context if several operations are performed using the same -parameters. - -The meaning of the parameters passed to the callback will depend on the -algorithm and the specifiic implementation of the algorithm. Some might not -give any useful information at all during key or parameter generation. Others -might not even call the callback. - -The operation performed by key or parameter generation depends on the algorithm -used. In some cases (e.g. EC with a supplied named curve) the "generation" -option merely sets the appropriate fields in an EVP_PKEY structure. - -In OpenSSL an EVP_PKEY structure containing a private key also contains the -public key components and parameters (if any). An OpenSSL private key is -equivalent to what some libraries call a "key pair". A private key can be used -in functions which require the use of a public key or parameters. - -=head1 RETURN VALUES - -EVP_PKEY_keygen_init(), EVP_PKEY_paramgen_init(), EVP_PKEY_keygen() and -EVP_PKEY_paramgen() return 1 for success and 0 or a negative value for failure. -In particular a return value of -2 indicates the operation is not supported by -the public key algorithm. - -=head1 EXAMPLES - -Generate a 2048 bit RSA key: - - #include <openssl/evp.h> - #include <openssl/rsa.h> - - EVP_PKEY_CTX *ctx; - EVP_PKEY *pkey = NULL; - ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_RSA, NULL); - if (!ctx) - /* Error occurred */ - if (EVP_PKEY_keygen_init(ctx) <= 0) - /* Error */ - if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, 2048) <= 0) - /* Error */ - - /* Generate key */ - if (EVP_PKEY_keygen(ctx, &pkey) <= 0) - /* Error */ - -Generate a key from a set of parameters: - - #include <openssl/evp.h> - #include <openssl/rsa.h> - - EVP_PKEY_CTX *ctx; - EVP_PKEY *pkey = NULL, *param; - /* Assumed param is set up already */ - ctx = EVP_PKEY_CTX_new(param); - if (!ctx) - /* Error occurred */ - if (EVP_PKEY_keygen_init(ctx) <= 0) - /* Error */ - - /* Generate key */ - if (EVP_PKEY_keygen(ctx, &pkey) <= 0) - /* Error */ - -Example of generation callback for OpenSSL public key implementations: - - /* Application data is a BIO to output status to */ - - EVP_PKEY_CTX_set_app_data(ctx, status_bio); - - static int genpkey_cb(EVP_PKEY_CTX *ctx) - { - char c='*'; - BIO *b = EVP_PKEY_CTX_get_app_data(ctx); - int p; - p = EVP_PKEY_CTX_get_keygen_info(ctx, 0); - if (p == 0) c='.'; - if (p == 1) c='+'; - if (p == 2) c='*'; - if (p == 3) c='\n'; - BIO_write(b,&c,1); - (void)BIO_flush(b); - return 1; - } - -=head1 SEE ALSO - -L<EVP_PKEY_CTX_new(3)|EVP_PKEY_CTX_new(3)>, -L<EVP_PKEY_encrypt(3)|EVP_PKEY_encrypt(3)>, -L<EVP_PKEY_decrypt(3)|EVP_PKEY_decrypt(3)>, -L<EVP_PKEY_sign(3)|EVP_PKEY_sign(3)>, -L<EVP_PKEY_verify(3)|EVP_PKEY_verify(3)>, -L<EVP_PKEY_verify_recover(3)|EVP_PKEY_verify_recover(3)>, -L<EVP_PKEY_derive(3)|EVP_PKEY_derive(3)> - -=head1 HISTORY - -These functions were first added to OpenSSL 1.0.0. - -=cut |