[#EVP_PKEY_encrypt]
= EVP_PKEY_encrypt
:mrdocs:

Encrypt data with a public key using a context from EVP_PKEY_encrypt_init().

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_encrypt(
    xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]* ctx,
    unsigned char* out,
    size_t* outlen,
    unsigned char const* in,
    size_t inlen);
----

== Return Value

1 on success, or a non‐positive value on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Encryption context holding the public key.
| *out*
| Output buffer for ciphertext, or NULL to query the required size via `outlen.`
| *outlen*
| On entry, capacity of `out` when non‐NULL; on return, bytes written or required.
| *in*
| Plaintext bytes to encrypt.
| *inlen*
| Length of `in` in bytes.
|===


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