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EVP_PKEY_CTX_GET_OPERATION(3) FreeBSD Library Functions Manual NAME EVP_PKEY_CTX_get_operation, EVP_PKEY_CTX_get0_pkey - inspect EVP_PKEY_CTX objects SYNOPSIS #include <openssl/evp.h> int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx); EVP_PKEY * EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx); DESCRIPTION EVP_PKEY_CTX_get_operation() finds out which initialization function has been called on ctx, if any: return value initialized with e.g. for EVP_PKEY_OP_DECRYPT EVP_PKEY_decrypt_init(3) RSA, SM2 EVP_PKEY_OP_DERIVE EVP_PKEY_derive_init(3) HKDF EVP_PKEY_OP_ENCRYPT EVP_PKEY_encrypt_init(3) RSA, SM2 EVP_PKEY_OP_KEYGEN EVP_PKEY_keygen_init(3) almost all EVP_PKEY_OP_PARAMGEN EVP_PKEY_paramgen_init(3) DH, DSA, EC EVP_PKEY_OP_SIGN EVP_PKEY_sign_init(3) DSA,EC,RSA,SM2 EVP_PKEY_OP_SIGN EVP_DigestSignInit(3) ED25519 EVP_PKEY_OP_SIGNCTX EVP_DigestSignInit(3) CMAC, HMAC EVP_PKEY_OP_UNDEFINED not initialized NONE EVP_PKEY_OP_VERIFY EVP_PKEY_verify_init(3) DSA,EC,RSA,SM2 EVP_PKEY_OP_VERIFY EVP_DigestVerifyInit(3) ED25519 EVP_PKEY_OP_VERIFYCTX EVP_DigestVerifyInit(3) no built-in EVP_PKEY_OP_VERIFYRECOVER EVP_PKEY_verify_recover_init(3) RSA The rightmost column of the above table shows examples of algorithms the return values can occur for. For example, if EVP_PKEY_base_id(3) returns EVP_PKEY_HKDF, then calling EVP_PKEY_CTX_get_operation() on a EVP_PKEY_CTX using that key may return EVP_PKEY_OP_DERIVE. If the return value is EVP_PKEY_OP_SIGNCTX or EVP_PKEY_OP_VERIFYCTX, the ctx supports EVP_DigestSignUpdate(3) or EVP_DigestVerifyUpdate(3), respectively. If the return value is EVP_PKEY_OP_SIGN or EVP_PKEY_OP_VERIFY, if does not, and only one-shot signing or verification is supported. The return value EVP_PKEY_OP_UNDEFINED can for example occur if the ctx was freshly returned from EVP_PKEY_CTX_new(3) or EVP_PKEY_CTX_new_id(3) and not yet initialized. The following masks are defined as the logical OR of two or more of the above EVP_PKEY_OP_* bits: EVP_PKEY_OP_TYPE_CRYPT DECRYPT | ENCRYPT EVP_PKEY_OP_TYPE_GEN KEYGEN | PARAMGEN EVP_PKEY_OP_TYPE_NOGEN CRYPT | DERIVE | SIG EVP_PKEY_OP_TYPE_SIG SIGN | SIGNCTX | VERIFY | VERIFYCTX | VERIFYRECOVER RETURN VALUES EVP_PKEY_CTX_get_operation() returns one of the single-bit EVP_PKEY_OP_* constants or EVP_PKEY_OP_UNDEFINED if ctx is not initialized. EVP_PKEY_CTX_get0_pkey() returns an internal pointer to the EVP_PKEY object used by ctx, without incrementing its reference count. SEE ALSO evp(3), EVP_PKEY_base_id(3), EVP_PKEY_CTX_ctrl(3), EVP_PKEY_CTX_new(3), EVP_PKEY_new(3) HISTORY EVP_PKEY_CTX_get_operation() and EVP_PKEY_CTX_get0_pkey() first appeared in OpenSSL 1.0.0 and have been available since OpenBSD 4.9. FreeBSD 14.1-RELEASE-p8 September 12, 2023 FreeBSD 14.1-RELEASE-p8