From 4a0dcd849c5b5d92aff1bcffdc9e4b5a8f7482a7 Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Mon, 20 Jul 2015 22:05:10 +0100 Subject: [PATCH] EVP_PKEY_METHOD accessor functions. Functions to retrieve the function pointer of an existing method: this can be used to create a method which intercepts or modifies the behaviour of an existing method while retaining most of the existing behaviour. Reviewed-by: Rich Salz (cherry picked from commit e7451ed137450e4bc6c4bec33bc9054bce443feb) Reviewed-by: Matt Caswell (Merged from https://github.com/openssl/openssl/pull/4453) --- crypto/evp/evp.h | 92 +++++++++++++++++++++++ crypto/evp/pmeth_lib.c | 167 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 259 insertions(+) diff --git a/crypto/evp/evp.h b/crypto/evp/evp.h index d258ef870a..cf1de15e6d 100644 --- a/crypto/evp/evp.h +++ b/crypto/evp/evp.h @@ -1363,6 +1363,98 @@ void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth, const char *type, const char *value)); +void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth, + int (**pinit) (EVP_PKEY_CTX *ctx)); + +void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth, + int (**pcopy) (EVP_PKEY_CTX *dst, + EVP_PKEY_CTX *src)); + +void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth, + void (**pcleanup) (EVP_PKEY_CTX *ctx)); + +void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth, + int (**pparamgen_init) (EVP_PKEY_CTX *ctx), + int (**pparamgen) (EVP_PKEY_CTX *ctx, + EVP_PKEY *pkey)); + +void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth, + int (**pkeygen_init) (EVP_PKEY_CTX *ctx), + int (**pkeygen) (EVP_PKEY_CTX *ctx, + EVP_PKEY *pkey)); + +void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth, + int (**psign_init) (EVP_PKEY_CTX *ctx), + int (**psign) (EVP_PKEY_CTX *ctx, + unsigned char *sig, size_t *siglen, + const unsigned char *tbs, + size_t tbslen)); + +void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth, + int (**pverify_init) (EVP_PKEY_CTX *ctx), + int (**pverify) (EVP_PKEY_CTX *ctx, + const unsigned char *sig, + size_t siglen, + const unsigned char *tbs, + size_t tbslen)); + +void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth, + int (**pverify_recover_init) (EVP_PKEY_CTX + *ctx), + int (**pverify_recover) (EVP_PKEY_CTX + *ctx, + unsigned char + *sig, + size_t *siglen, + const unsigned + char *tbs, + size_t tbslen)); + +void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth, + int (**psignctx_init) (EVP_PKEY_CTX *ctx, + EVP_MD_CTX *mctx), + int (**psignctx) (EVP_PKEY_CTX *ctx, + unsigned char *sig, + size_t *siglen, + EVP_MD_CTX *mctx)); + +void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth, + int (**pverifyctx_init) (EVP_PKEY_CTX *ctx, + EVP_MD_CTX *mctx), + int (**pverifyctx) (EVP_PKEY_CTX *ctx, + const unsigned char *sig, + int siglen, + EVP_MD_CTX *mctx)); + +void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth, + int (**pencrypt_init) (EVP_PKEY_CTX *ctx), + int (**pencryptfn) (EVP_PKEY_CTX *ctx, + unsigned char *out, + size_t *outlen, + const unsigned char *in, + size_t inlen)); + +void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth, + int (**pdecrypt_init) (EVP_PKEY_CTX *ctx), + int (**pdecrypt) (EVP_PKEY_CTX *ctx, + unsigned char *out, + size_t *outlen, + const unsigned char *in, + size_t inlen)); + +void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth, + int (**pderive_init) (EVP_PKEY_CTX *ctx), + int (**pderive) (EVP_PKEY_CTX *ctx, + unsigned char *key, + size_t *keylen)); + +void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth, + int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1, + void *p2), + int (**pctrl_str) (EVP_PKEY_CTX *ctx, + const char *type, + const char *value)); + void EVP_add_alg_module(void); /* BEGIN ERROR CODES */ diff --git a/crypto/evp/pmeth_lib.c b/crypto/evp/pmeth_lib.c index b7b7bdcd02..e50826b568 100644 --- a/crypto/evp/pmeth_lib.c +++ b/crypto/evp/pmeth_lib.c @@ -589,3 +589,170 @@ void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth, pmeth->ctrl = ctrl; pmeth->ctrl_str = ctrl_str; } + +void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth, + int (**pinit) (EVP_PKEY_CTX *ctx)) +{ + *pinit = pmeth->init; +} + +void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth, + int (**pcopy) (EVP_PKEY_CTX *dst, + EVP_PKEY_CTX *src)) +{ + *pcopy = pmeth->copy; +} + +void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth, + void (**pcleanup) (EVP_PKEY_CTX *ctx)) +{ + *pcleanup = pmeth->cleanup; +} + +void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth, + int (**pparamgen_init) (EVP_PKEY_CTX *ctx), + int (**pparamgen) (EVP_PKEY_CTX *ctx, + EVP_PKEY *pkey)) +{ + if (pparamgen_init) + *pparamgen_init = pmeth->paramgen_init; + if (pparamgen) + *pparamgen = pmeth->paramgen; +} + +void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth, + int (**pkeygen_init) (EVP_PKEY_CTX *ctx), + int (**pkeygen) (EVP_PKEY_CTX *ctx, + EVP_PKEY *pkey)) +{ + if (pkeygen_init) + *pkeygen_init = pmeth->keygen_init; + if (pkeygen) + *pkeygen = pmeth->keygen; +} + +void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth, + int (**psign_init) (EVP_PKEY_CTX *ctx), + int (**psign) (EVP_PKEY_CTX *ctx, + unsigned char *sig, size_t *siglen, + const unsigned char *tbs, + size_t tbslen)) +{ + if (psign_init) + *psign_init = pmeth->sign_init; + if (psign) + *psign = pmeth->sign; +} + +void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth, + int (**pverify_init) (EVP_PKEY_CTX *ctx), + int (**pverify) (EVP_PKEY_CTX *ctx, + const unsigned char *sig, + size_t siglen, + const unsigned char *tbs, + size_t tbslen)) +{ + if (pverify_init) + *pverify_init = pmeth->verify_init; + if (pverify) + *pverify = pmeth->verify; +} + +void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth, + int (**pverify_recover_init) (EVP_PKEY_CTX + *ctx), + int (**pverify_recover) (EVP_PKEY_CTX + *ctx, + unsigned char + *sig, + size_t *siglen, + const unsigned + char *tbs, + size_t tbslen)) +{ + if (pverify_recover_init) + *pverify_recover_init = pmeth->verify_recover_init; + if (pverify_recover) + *pverify_recover = pmeth->verify_recover; +} + +void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth, + int (**psignctx_init) (EVP_PKEY_CTX *ctx, + EVP_MD_CTX *mctx), + int (**psignctx) (EVP_PKEY_CTX *ctx, + unsigned char *sig, + size_t *siglen, + EVP_MD_CTX *mctx)) +{ + if (psignctx_init) + *psignctx_init = pmeth->signctx_init; + if (psignctx) + *psignctx = pmeth->signctx; +} + +void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth, + int (**pverifyctx_init) (EVP_PKEY_CTX *ctx, + EVP_MD_CTX *mctx), + int (**pverifyctx) (EVP_PKEY_CTX *ctx, + const unsigned char *sig, + int siglen, + EVP_MD_CTX *mctx)) +{ + if (pverifyctx_init) + *pverifyctx_init = pmeth->verifyctx_init; + if (pverifyctx) + *pverifyctx = pmeth->verifyctx; +} + +void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth, + int (**pencrypt_init) (EVP_PKEY_CTX *ctx), + int (**pencryptfn) (EVP_PKEY_CTX *ctx, + unsigned char *out, + size_t *outlen, + const unsigned char *in, + size_t inlen)) +{ + if (pencrypt_init) + *pencrypt_init = pmeth->encrypt_init; + if (pencryptfn) + *pencryptfn = pmeth->encrypt; +} + +void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth, + int (**pdecrypt_init) (EVP_PKEY_CTX *ctx), + int (**pdecrypt) (EVP_PKEY_CTX *ctx, + unsigned char *out, + size_t *outlen, + const unsigned char *in, + size_t inlen)) +{ + if (pdecrypt_init) + *pdecrypt_init = pmeth->decrypt_init; + if (pdecrypt) + *pdecrypt = pmeth->decrypt; +} + +void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth, + int (**pderive_init) (EVP_PKEY_CTX *ctx), + int (**pderive) (EVP_PKEY_CTX *ctx, + unsigned char *key, + size_t *keylen)) +{ + if (pderive_init) + *pderive_init = pmeth->derive_init; + if (pderive) + *pderive = pmeth->derive; +} + +void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth, + int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1, + void *p2), + int (**pctrl_str) (EVP_PKEY_CTX *ctx, + const char *type, + const char *value)) +{ + if (pctrl) + *pctrl = pmeth->ctrl; + if (pctrl_str) + *pctrl_str = pmeth->ctrl_str; +} -- 2.25.1