Automatically generated by Pod::Man 4.10 (Pod::Simple 3.35)

Standard preamble:
========================================================================
..

..

.. Set up some character translations and predefined strings. \*(-- will
give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
double quote, and \*(R" will give a right double quote. \*(C+ will
give a nicer C++. Capital omega is used to do unbreakable dashes and
therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
nothing in troff, for use with C<>.
.tr \(*W- . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\}
Escape single quotes in literal strings from groff's Unicode transform.

If the F register is >0, we'll generate index entries on stderr for
titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
entries marked with X<> in POD. Of course, you'll have to process the
output yourself in some meaningful fashion.

Avoid warning from groff about undefined register 'F'.
.. .nr rF 0 . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF
Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] .\} . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents . \" corrections for vroff . \" for low resolution devices (crt and lpr) \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} ========================================================================

Title "EVP_PKEY_encrypt 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
EVP_PKEY_encrypt_init, EVP_PKEY_encrypt - encrypt using a public key algorithm Header "SYNOPSIS" .Vb 1 #include <openssl/evp.h> \& int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx); int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char *in, size_t inlen); .Ve Header "DESCRIPTION" The EVP_PKEY_encrypt_init() function initializes a public key algorithm context using key pkey for an encryption operation.

The EVP_PKEY_encrypt() function performs a public key encryption operation using ctx. The data to be encrypted is specified using the in and \fBinlen parameters. If out is \s-1NULL\s0 then the maximum size of the output buffer is written to the outlen parameter. If out is not \s-1NULL\s0 then before the call the outlen parameter should contain the length of the \fBout buffer, if the call is successful the encrypted data is written to \fBout and the amount of data written to outlen.

Header "NOTES" After the call to EVP_PKEY_encrypt_init() algorithm specific control operations can be performed to set any appropriate parameters for the operation.

The function EVP_PKEY_encrypt() can be called more than once on the same context if several operations are performed using the same parameters.

Header "RETURN VALUES" \fBEVP_PKEY_encrypt_init() and EVP_PKEY_encrypt() 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. Header "EXAMPLE" Encrypt data using \s-1OAEP\s0 (for \s-1RSA\s0 keys). See also PEM_read_PUBKEY\|(3) or \fBd2i_X509\|(3) for means to load a public key. You may also simply set 'eng = \s-1NULL\s0;' to start with the default OpenSSL \s-1RSA\s0 implementation:

.Vb 3 #include <openssl/evp.h> #include <openssl/rsa.h> #include <openssl/engine.h> \& EVP_PKEY_CTX *ctx; ENGINE *eng; unsigned char *out, *in; size_t outlen, inlen; EVP_PKEY *key; /* NB: assumes eng, key, in, inlen are already set up, * and that key is an RSA public key */ ctx = EVP_PKEY_CTX_new(key,eng); if (!ctx) /* Error occurred */ if (EVP_PKEY_encrypt_init(ctx) <= 0) /* Error */ if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_OAEP_PADDING) <= 0) /* Error */ \& /* Determine buffer length */ if (EVP_PKEY_encrypt(ctx, NULL, &outlen, in, inlen) <= 0) /* Error */ \& out = OPENSSL_malloc(outlen); \& if (!out) /* malloc failure */ if (EVP_PKEY_encrypt(ctx, out, &outlen, in, inlen) <= 0) /* Error */ \& /* Encrypted data is outlen bytes written to buffer out */ .Ve

Header "SEE ALSO" \fBd2i_X509\|(3), \fBengine\|(3), \fBEVP_PKEY_CTX_new\|(3), \fBEVP_PKEY_decrypt\|(3), \fBEVP_PKEY_sign\|(3), \fBEVP_PKEY_verify\|(3), \fBEVP_PKEY_verify_recover\|(3), \fBEVP_PKEY_derive\|(3) Header "HISTORY" These functions were first added to OpenSSL 1.0.0.