Create a signature over data using an initialized signing context.

Synopsis

Declared in <openssl/evp.h>

int
EVP_PKEY_sign(
    EVP_PKEY_CTX* ctx,
    unsigned char* sig,
    size_t* siglen,
    unsigned char const* tbs,
    size_t tbslen);

Return Value

1 on success, 0 or a negative value on failure.

Parameters

Name

Description

ctx

Context previously prepared with EVP_PKEY_sign_init() (and optional controls).

sig

Output buffer for the signature, or NULL to only query the required length.

siglen

On entry, capacity of sig when non‐NULL; on return, signature length in bytes.

tbs

Message or digest bytes to sign.

tbslen

Length of tbs in bytes.

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