Initialize a seal (envelope encrypt) operation for npubk recipients.
Declared in <openssl/evp.h>
int
EVP_SealInit(
EVP_CIPHER_CTX* ctx,
EVP_CIPHER const* type,
unsigned char** ek,
int* ekl,
unsigned char* iv,
EVP_PKEY** pubk,
int npubk);Number of recipients successfully processed, or 0 on failure.
| Name | Description |
|---|---|
| ctx | Cipher context that will encrypt the content with a generated session key. |
| type | Symmetric cipher used for the content. |
| ek | Array of buffers receiving per-recipient encrypted session keys. |
| ekl | Array receiving the encrypted-key lengths written to ek. |
| iv | Buffer receiving the generated IV (sized for type), or NULL if unused. |
| pubk | Array of recipient public keys used to wrap the session key. |
| npubk | Number of entries in pubk / ek / ekl. |