From f4e46b817d587c300faa04fd061ddcdea3dd64c9 Mon Sep 17 00:00:00 2001 From: Richard Levitte Date: Mon, 15 Mar 2021 15:05:59 +0100 Subject: PROV: Add type specific MSBLOB and PVK decoding for the MS->key decoders To make this cleaner, decoder_ms2key.c is split into decoder_msblob2key.c and decoder_pvk2key.c. This required a great deal of refactoring of crypto/pem/pvkfmt.c, to make cleaner internal functions that our decoder implementations can use. Reviewed-by: Tomas Mraz (Merged from https://github.com/openssl/openssl/pull/14314) --- providers/implementations/encode_decode/build.info | 3 +- .../implementations/encode_decode/decode_ms2key.c | 273 -------------------- .../encode_decode/decode_msblob2key.c | 284 +++++++++++++++++++++ .../implementations/encode_decode/decode_pvk2key.c | 232 +++++++++++++++++ 4 files changed, 518 insertions(+), 274 deletions(-) delete mode 100644 providers/implementations/encode_decode/decode_ms2key.c create mode 100644 providers/implementations/encode_decode/decode_msblob2key.c create mode 100644 providers/implementations/encode_decode/decode_pvk2key.c (limited to 'providers/implementations/encode_decode') diff --git a/providers/implementations/encode_decode/build.info b/providers/implementations/encode_decode/build.info index 5b8d9f6ef2..694e3c94a5 100644 --- a/providers/implementations/encode_decode/build.info +++ b/providers/implementations/encode_decode/build.info @@ -12,7 +12,8 @@ $EC_GOAL=../../libimplementations.a SOURCE[$ENCODER_GOAL]=endecoder_common.c -SOURCE[$DECODER_GOAL]=decode_der2key.c decode_pem2der.c decode_ms2key.c +SOURCE[$DECODER_GOAL]=decode_der2key.c decode_pem2der.c \ + decode_msblob2key.c decode_pvk2key.c SOURCE[$ENCODER_GOAL]=encode_key2any.c encode_key2text.c encode_key2ms.c # encode_key2blob.c is only being included when EC is enabled, because we diff --git a/providers/implementations/encode_decode/decode_ms2key.c b/providers/implementations/encode_decode/decode_ms2key.c deleted file mode 100644 index f38717cbb3..0000000000 --- a/providers/implementations/encode_decode/decode_ms2key.c +++ /dev/null @@ -1,273 +0,0 @@ -/* - * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. - * - * Licensed under the Apache License 2.0 (the "License"). You may not use - * this file except in compliance with the License. You can obtain a copy - * in the file LICENSE in the source distribution or at - * https://www.openssl.org/source/license.html - */ - -/* - * low level APIs are deprecated for public use, but still ok for - * internal use. - */ -#include "internal/deprecated.h" - -#include - -#include -#include -#include -#include -#include -#include /* For public PVK functions */ -#include -#include "internal/passphrase.h" -#include "crypto/pem.h" /* For internal PVK and "blob" headers */ -#include "prov/bio.h" -#include "prov/implementations.h" -#include "endecoder_local.h" - -static EVP_PKEY *read_msblob(PROV_CTX *provctx, OSSL_CORE_BIO *cin, int *ispub) -{ - BIO *in = ossl_bio_new_from_core_bio(provctx, cin); - EVP_PKEY *pkey = ossl_b2i_bio(in, ispub); - - BIO_free(in); - return pkey; -} - -static EVP_PKEY *read_pvk(PROV_CTX *provctx, OSSL_CORE_BIO *cin, - OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg) -{ - BIO *in = NULL; - EVP_PKEY *pkey = NULL; - struct ossl_passphrase_data_st pwdata; - - memset(&pwdata, 0, sizeof(pwdata)); - if (!ossl_pw_set_ossl_passphrase_cb(&pwdata, pw_cb, pw_cbarg)) - return NULL; - - in = ossl_bio_new_from_core_bio(provctx, cin); - pkey = b2i_PVK_bio(in, ossl_pw_pem_password, &pwdata); - BIO_free(in); - - return pkey; -} - -static OSSL_FUNC_decoder_freectx_fn ms2key_freectx; -static OSSL_FUNC_decoder_gettable_params_fn ms2key_gettable_params; -static OSSL_FUNC_decoder_get_params_fn msblob2key_get_params; -static OSSL_FUNC_decoder_get_params_fn pvk2key_get_params; -static OSSL_FUNC_decoder_decode_fn msblob2key_decode; -static OSSL_FUNC_decoder_decode_fn pvk2key_decode; -static OSSL_FUNC_decoder_export_object_fn ms2key_export_object; - -typedef void *(extract_key_fn)(EVP_PKEY *); -typedef void (free_key_fn)(void *); -struct keytype_desc_st { - int type; /* EVP key type */ - const char *name; /* Keytype */ - const OSSL_DISPATCH *fns; /* Keymgmt (to pilfer functions from) */ - - /* - * These must be the correct EVP_PKEY_get1_{TYPE}() and {TYPE}_free() - * function for the key. - */ - extract_key_fn *extract_key; - free_key_fn *free_key; -}; - -/* - * Context used for DER to key decoding. - */ -struct ms2key_ctx_st { - PROV_CTX *provctx; - const struct keytype_desc_st *desc; -}; - -static struct ms2key_ctx_st * -ms2key_newctx(void *provctx, const struct keytype_desc_st *desc) -{ - struct ms2key_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx)); - - if (ctx != NULL) { - ctx->provctx = provctx; - ctx->desc = desc; - } - return ctx; -} - -static void ms2key_freectx(void *vctx) -{ - struct ms2key_ctx_st *ctx = vctx; - - OPENSSL_free(ctx); -} - -static const OSSL_PARAM *ms2key_gettable_params(ossl_unused void *provctx) -{ - static const OSSL_PARAM gettables[] = { - { OSSL_DECODER_PARAM_INPUT_TYPE, OSSL_PARAM_UTF8_PTR, NULL, 0, 0 }, - OSSL_PARAM_END, - }; - - return gettables; -} - -static int msblob2key_get_params(OSSL_PARAM params[]) -{ - OSSL_PARAM *p; - - p = OSSL_PARAM_locate(params, OSSL_DECODER_PARAM_INPUT_TYPE); - if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "MSBLOB")) - return 0; - - return 1; -} - -static int pvk2key_get_params(OSSL_PARAM params[]) -{ - OSSL_PARAM *p; - - p = OSSL_PARAM_locate(params, OSSL_DECODER_PARAM_INPUT_TYPE); - if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "PVK")) - return 0; - - return 1; -} - -static int ms2key_post(struct ms2key_ctx_st *ctx, EVP_PKEY *pkey, - OSSL_CALLBACK *data_cb, void *data_cbarg) -{ - void *key = NULL; - int ok = 0; - - if (pkey != NULL) { - /* - * Tear out the low-level key pointer from the pkey, - * but only if it matches the expected key type. - * - * The check should be done with EVP_PKEY_is_a(), but - * as long as we still have #legacy internal keys, it's safer to - * use the type numbers in side the provider. - */ - if (EVP_PKEY_id(pkey) == ctx->desc->type) - key = ctx->desc->extract_key(pkey); - } - - if (key != NULL) { - OSSL_PARAM params[4]; - int object_type = OSSL_OBJECT_PKEY; - - params[0] = - OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type); - params[1] = - OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE, - (char *)ctx->desc->name, 0); - /* The address of the key becomes the octet string */ - params[2] = - OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE, - &key, sizeof(key)); - params[3] = OSSL_PARAM_construct_end(); - - ok = data_cb(params, data_cbarg); - } - ctx->desc->free_key(key); - - return ok; -} - -static int msblob2key_decode(void *vctx, OSSL_CORE_BIO *cin, int selection, - OSSL_CALLBACK *data_cb, void *data_cbarg, - OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg) -{ - struct ms2key_ctx_st *ctx = vctx; - int ispub = -1; - EVP_PKEY *pkey = read_msblob(ctx->provctx, cin, &ispub); - int ok = 0; - - if (selection == 0 - || (ispub - ? (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0 - : (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)) - ok = ms2key_post(ctx, pkey, data_cb, data_cbarg); - - EVP_PKEY_free(pkey); - return ok; -} - -static int pvk2key_decode(void *vctx, OSSL_CORE_BIO *cin, int selection, - OSSL_CALLBACK *data_cb, void *data_cbarg, - OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg) -{ - struct ms2key_ctx_st *ctx = vctx; - EVP_PKEY *pkey = read_pvk(ctx->provctx, cin, pw_cb, pw_cbarg); - int ok = 0; - - if (selection == 0 - || (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) - ok = ms2key_post(ctx, pkey, data_cb, data_cbarg); - - EVP_PKEY_free(pkey); - return ok; -} - -static int ms2key_export_object(void *vctx, - const void *reference, size_t reference_sz, - OSSL_CALLBACK *export_cb, void *export_cbarg) -{ - struct ms2key_ctx_st *ctx = vctx; - OSSL_FUNC_keymgmt_export_fn *export = - ossl_prov_get_keymgmt_export(ctx->desc->fns); - void *keydata; - - if (reference_sz == sizeof(keydata) && export != NULL) { - /* The contents of the reference is the address to our object */ - keydata = *(void **)reference; - - return export(keydata, OSSL_KEYMGMT_SELECT_ALL, - export_cb, export_cbarg); - } - return 0; -} - -#define IMPLEMENT_TYPE(KEYTYPEstr, KEYTYPE, keytype, extract, free) \ - static const struct keytype_desc_st keytype##_desc; \ - static OSSL_FUNC_decoder_newctx_fn ms2##keytype##_newctx; \ - static void *ms2##keytype##_newctx(void *provctx) \ - { \ - return ms2key_newctx(provctx, &keytype##_desc); \ - } \ - static const struct keytype_desc_st keytype##_desc = \ - { EVP_PKEY_##KEYTYPE, KEYTYPEstr, \ - ossl_##keytype##_keymgmt_functions, \ - (extract_key_fn *)extract, \ - (free_key_fn *)free } - -#define IMPLEMENT_MS(mstype, keytype) \ - const OSSL_DISPATCH \ - ossl_##mstype##_to_##keytype##_decoder_functions[] = { \ - { OSSL_FUNC_DECODER_NEWCTX, \ - (void (*)(void))ms2##keytype##_newctx }, \ - { OSSL_FUNC_DECODER_FREECTX, \ - (void (*)(void))ms2key_freectx }, \ - { OSSL_FUNC_DECODER_GETTABLE_PARAMS, \ - (void (*)(void))ms2key_gettable_params }, \ - { OSSL_FUNC_DECODER_GET_PARAMS, \ - (void (*)(void))mstype##2key_get_params }, \ - { OSSL_FUNC_DECODER_DECODE, \ - (void (*)(void))mstype##2key_decode }, \ - { OSSL_FUNC_DECODER_EXPORT_OBJECT, \ - (void (*)(void))ms2key_export_object }, \ - { 0, NULL } \ - } - -#ifndef OPENSSL_NO_DSA -IMPLEMENT_TYPE("DSA", DSA, dsa, EVP_PKEY_get1_DSA, DSA_free); -IMPLEMENT_MS(msblob, dsa); -IMPLEMENT_MS(pvk, dsa); -#endif -IMPLEMENT_TYPE("RSA", RSA, rsa, EVP_PKEY_get1_RSA, RSA_free); -IMPLEMENT_MS(msblob, rsa); -IMPLEMENT_MS(pvk, rsa); diff --git a/providers/implementations/encode_decode/decode_msblob2key.c b/providers/implementations/encode_decode/decode_msblob2key.c new file mode 100644 index 0000000000..f47d06f59d --- /dev/null +++ b/providers/implementations/encode_decode/decode_msblob2key.c @@ -0,0 +1,284 @@ +/* + * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +/* + * low level APIs are deprecated for public use, but still ok for + * internal use. + */ +#include "internal/deprecated.h" + +#include + +#include +#include +#include +#include +#include +#include /* For public PVK functions */ +#include +#include +#include "internal/passphrase.h" +#include "crypto/pem.h" /* For internal PVK and "blob" headers */ +#include "crypto/rsa.h" +#include "prov/bio.h" +#include "prov/implementations.h" +#include "endecoder_local.h" + +struct msblob2key_ctx_st; /* Forward declaration */ +typedef void *b2i_of_void_fn(const unsigned char **in, unsigned int bitlen, + int ispub); +typedef void adjust_key_fn(void *, struct msblob2key_ctx_st *ctx); +typedef void free_key_fn(void *); +struct keytype_desc_st { + int type; /* EVP key type */ + const char *name; /* Keytype */ + const OSSL_DISPATCH *fns; /* Keymgmt (to pilfer functions from) */ + + b2i_of_void_fn *read_private_key; + b2i_of_void_fn *read_public_key; + adjust_key_fn *adjust_key; + free_key_fn *free_key; +}; + +static OSSL_FUNC_decoder_freectx_fn msblob2key_freectx; +static OSSL_FUNC_decoder_gettable_params_fn msblob2key_gettable_params; +static OSSL_FUNC_decoder_get_params_fn msblob2key_get_params; +static OSSL_FUNC_decoder_decode_fn msblob2key_decode; +static OSSL_FUNC_decoder_export_object_fn msblob2key_export_object; + +/* + * Context used for DER to key decoding. + */ +struct msblob2key_ctx_st { + PROV_CTX *provctx; + const struct keytype_desc_st *desc; +}; + +static struct msblob2key_ctx_st * +msblob2key_newctx(void *provctx, const struct keytype_desc_st *desc) +{ + struct msblob2key_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx)); + + if (ctx != NULL) { + ctx->provctx = provctx; + ctx->desc = desc; + } + return ctx; +} + +static void msblob2key_freectx(void *vctx) +{ + struct msblob2key_ctx_st *ctx = vctx; + + OPENSSL_free(ctx); +} + +static const OSSL_PARAM *msblob2key_gettable_params(ossl_unused void *provctx) +{ + static const OSSL_PARAM gettables[] = { + { OSSL_DECODER_PARAM_INPUT_TYPE, OSSL_PARAM_UTF8_PTR, NULL, 0, 0 }, + OSSL_PARAM_END, + }; + + return gettables; +} + +static int msblob2key_get_params(OSSL_PARAM params[]) +{ + OSSL_PARAM *p; + + p = OSSL_PARAM_locate(params, OSSL_DECODER_PARAM_INPUT_TYPE); + if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "MSBLOB")) + return 0; + + return 1; +} + +static int msblob2key_decode(void *vctx, OSSL_CORE_BIO *cin, int selection, + OSSL_CALLBACK *data_cb, void *data_cbarg, + OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg) +{ + struct msblob2key_ctx_st *ctx = vctx; + BIO *in = ossl_bio_new_from_core_bio(ctx->provctx, cin); + const unsigned char *p; + unsigned char hdr_buf[16], *buf = NULL; + unsigned int bitlen, magic, length; + int isdss = -1; + int ispub = -1; + void *key = NULL; + int ok = 0; + + if (BIO_read(in, hdr_buf, 16) != 16) { + ERR_raise(ERR_LIB_PEM, PEM_R_KEYBLOB_TOO_SHORT); + goto err; + } + p = hdr_buf; + if (ossl_do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0) + goto err; + + if ((isdss && ctx->desc->type != EVP_PKEY_DSA) + || (!isdss && ctx->desc->type != EVP_PKEY_RSA)) + goto err; + + length = ossl_blob_length(bitlen, isdss, ispub); + if (length > BLOB_MAX_LENGTH) { + ERR_raise(ERR_LIB_PEM, PEM_R_HEADER_TOO_LONG); + goto err; + } + buf = OPENSSL_malloc(length); + if (buf == NULL) { + ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); + goto err; + } + p = buf; + if (BIO_read(in, buf, length) != (int)length) { + ERR_raise(ERR_LIB_PEM, PEM_R_KEYBLOB_TOO_SHORT); + goto err; + } + + if ((selection == 0 + || (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) + && !ispub + && ctx->desc->read_private_key != NULL) { + struct ossl_passphrase_data_st pwdata; + + memset(&pwdata, 0, sizeof(pwdata)); + if (!ossl_pw_set_ossl_passphrase_cb(&pwdata, pw_cb, pw_cbarg)) + goto err; + p = buf; + key = ctx->desc->read_private_key(&p, bitlen, ispub); + if (selection != 0 && key == NULL) + goto next; + } + if (key == NULL && (selection == 0 + || (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) + && ispub + && ctx->desc->read_public_key != NULL) { + p = buf; + key = ctx->desc->read_public_key(&p, bitlen, ispub); + if (selection != 0 && key == NULL) + goto next; + } + + if (key != NULL && ctx->desc->adjust_key != NULL) + ctx->desc->adjust_key(key, ctx); + + next: + /* + * We free resources here so it's not held up during the callback, because + * we know the process is recursive and the allocated chunks of memory + * add up. + */ + OPENSSL_free(buf); + BIO_free(in); + buf = NULL; + in = NULL; + + if (key != NULL) { + OSSL_PARAM params[4]; + int object_type = OSSL_OBJECT_PKEY; + + params[0] = + OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type); + params[1] = + OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE, + (char *)ctx->desc->name, 0); + /* The address of the key becomes the octet string */ + params[2] = + OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE, + &key, sizeof(key)); + params[3] = OSSL_PARAM_construct_end(); + + ok = data_cb(params, data_cbarg); + } + + err: + BIO_free(in); + OPENSSL_free(buf); + ctx->desc->free_key(key); + + return ok; +} + +static int +msblob2key_export_object(void *vctx, + const void *reference, size_t reference_sz, + OSSL_CALLBACK *export_cb, void *export_cbarg) +{ + struct msblob2key_ctx_st *ctx = vctx; + OSSL_FUNC_keymgmt_export_fn *export = + ossl_prov_get_keymgmt_export(ctx->desc->fns); + void *keydata; + + if (reference_sz == sizeof(keydata) && export != NULL) { + /* The contents of the reference is the address to our object */ + keydata = *(void **)reference; + + return export(keydata, OSSL_KEYMGMT_SELECT_ALL, + export_cb, export_cbarg); + } + return 0; +} + +/* ---------------------------------------------------------------------- */ + +#define dsa_decode_private_key (b2i_of_void_fn *)ossl_b2i_DSA_after_header +#define dsa_decode_public_key (b2i_of_void_fn *)ossl_b2i_DSA_after_header +#define dsa_adjust NULL +#define dsa_free (void (*)(void *))DSA_free + +/* ---------------------------------------------------------------------- */ + +#define rsa_decode_private_key (b2i_of_void_fn *)ossl_b2i_RSA_after_header +#define rsa_decode_public_key (b2i_of_void_fn *)ossl_b2i_RSA_after_header + +static void rsa_adjust(void *key, struct msblob2key_ctx_st *ctx) +{ + ossl_rsa_set0_libctx(key, PROV_LIBCTX_OF(ctx->provctx)); +} + +#define rsa_free (void (*)(void *))RSA_free + +/* ---------------------------------------------------------------------- */ + +#define IMPLEMENT_MSBLOB(KEYTYPE, keytype) \ + static const struct keytype_desc_st mstype##2##keytype##_desc = { \ + EVP_PKEY_##KEYTYPE, #KEYTYPE, \ + ossl_##keytype##_keymgmt_functions, \ + keytype##_decode_private_key, \ + keytype##_decode_public_key, \ + keytype##_adjust, \ + keytype##_free \ + }; \ + static OSSL_FUNC_decoder_newctx_fn msblob2##keytype##_newctx; \ + static void *msblob2##keytype##_newctx(void *provctx) \ + { \ + return msblob2key_newctx(provctx, &mstype##2##keytype##_desc); \ + } \ + const OSSL_DISPATCH \ + ossl_msblob_to_##keytype##_decoder_functions[] = { \ + { OSSL_FUNC_DECODER_NEWCTX, \ + (void (*)(void))msblob2##keytype##_newctx }, \ + { OSSL_FUNC_DECODER_FREECTX, \ + (void (*)(void))msblob2key_freectx }, \ + { OSSL_FUNC_DECODER_GETTABLE_PARAMS, \ + (void (*)(void))msblob2key_gettable_params }, \ + { OSSL_FUNC_DECODER_GET_PARAMS, \ + (void (*)(void))msblob2key_get_params }, \ + { OSSL_FUNC_DECODER_DECODE, \ + (void (*)(void))msblob2key_decode }, \ + { OSSL_FUNC_DECODER_EXPORT_OBJECT, \ + (void (*)(void))msblob2key_export_object }, \ + { 0, NULL } \ + } + +#ifndef OPENSSL_NO_DSA +IMPLEMENT_MSBLOB(DSA, dsa); +#endif +IMPLEMENT_MSBLOB(RSA, rsa); diff --git a/providers/implementations/encode_decode/decode_pvk2key.c b/providers/implementations/encode_decode/decode_pvk2key.c new file mode 100644 index 0000000000..3f2c80abdc --- /dev/null +++ b/providers/implementations/encode_decode/decode_pvk2key.c @@ -0,0 +1,232 @@ +/* + * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +/* + * low level APIs are deprecated for public use, but still ok for + * internal use. + */ +#include "internal/deprecated.h" + +#include + +#include +#include +#include +#include +#include +#include /* For public PVK functions */ +#include +#include "internal/passphrase.h" +#include "crypto/pem.h" /* For internal PVK and "blob" headers */ +#include "crypto/rsa.h" +#include "prov/bio.h" +#include "prov/implementations.h" +#include "endecoder_local.h" + +struct pvk2key_ctx_st; /* Forward declaration */ +typedef int check_key_fn(void *, struct pvk2key_ctx_st *ctx); +typedef void adjust_key_fn(void *, struct pvk2key_ctx_st *ctx); +typedef void *b2i_PVK_of_bio_pw_fn(BIO *in, pem_password_cb *cb, void *u); +typedef void free_key_fn(void *); +struct keytype_desc_st { + int type; /* EVP key type */ + const char *name; /* Keytype */ + const OSSL_DISPATCH *fns; /* Keymgmt (to pilfer functions from) */ + + b2i_PVK_of_bio_pw_fn *read_private_key; + adjust_key_fn *adjust_key; + free_key_fn *free_key; +}; + +static OSSL_FUNC_decoder_freectx_fn pvk2key_freectx; +static OSSL_FUNC_decoder_gettable_params_fn pvk2key_gettable_params; +static OSSL_FUNC_decoder_get_params_fn pvk2key_get_params; +static OSSL_FUNC_decoder_decode_fn pvk2key_decode; +static OSSL_FUNC_decoder_export_object_fn pvk2key_export_object; + +/* + * Context used for DER to key decoding. + */ +struct pvk2key_ctx_st { + PROV_CTX *provctx; + const struct keytype_desc_st *desc; +}; + +static struct pvk2key_ctx_st * +pvk2key_newctx(void *provctx, const struct keytype_desc_st *desc) +{ + struct pvk2key_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx)); + + if (ctx != NULL) { + ctx->provctx = provctx; + ctx->desc = desc; + } + return ctx; +} + +static void pvk2key_freectx(void *vctx) +{ + struct pvk2key_ctx_st *ctx = vctx; + + OPENSSL_free(ctx); +} + +static const OSSL_PARAM *pvk2key_gettable_params(ossl_unused void *provctx) +{ + static const OSSL_PARAM gettables[] = { + { OSSL_DECODER_PARAM_INPUT_TYPE, OSSL_PARAM_UTF8_PTR, NULL, 0, 0 }, + OSSL_PARAM_END, + }; + + return gettables; +} + +static int pvk2key_get_params(OSSL_PARAM params[]) +{ + OSSL_PARAM *p; + + p = OSSL_PARAM_locate(params, OSSL_DECODER_PARAM_INPUT_TYPE); + if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "PVK")) + return 0; + + return 1; +} + +static int pvk2key_decode(void *vctx, OSSL_CORE_BIO *cin, int selection, + OSSL_CALLBACK *data_cb, void *data_cbarg, + OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg) +{ + struct pvk2key_ctx_st *ctx = vctx; + BIO *in = ossl_bio_new_from_core_bio(ctx->provctx, cin); + void *key = NULL; + int ok = 0; + + if ((selection == 0 + || (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) + && ctx->desc->read_private_key != NULL) { + struct ossl_passphrase_data_st pwdata; + + memset(&pwdata, 0, sizeof(pwdata)); + if (!ossl_pw_set_ossl_passphrase_cb(&pwdata, pw_cb, pw_cbarg)) + goto end; + key = ctx->desc->read_private_key(in, ossl_pw_pem_password, &pwdata); + if (selection != 0 && key == NULL) + goto next; + } + + if (key != NULL && ctx->desc->adjust_key != NULL) + ctx->desc->adjust_key(key, ctx); + + next: + /* + * We free resources here so it's not held up during the callback, because + * we know the process is recursive and the allocated chunks of memory + * add up. + */ + BIO_free(in); + in = NULL; + + if (key != NULL) { + OSSL_PARAM params[4]; + int object_type = OSSL_OBJECT_PKEY; + + params[0] = + OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type); + params[1] = + OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE, + (char *)ctx->desc->name, 0); + /* The address of the key becomes the octet string */ + params[2] = + OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE, + &key, sizeof(key)); + params[3] = OSSL_PARAM_construct_end(); + + ok = data_cb(params, data_cbarg); + } + + end: + BIO_free(in); + ctx->desc->free_key(key); + + return ok; +} + +static int pvk2key_export_object(void *vctx, + const void *reference, size_t reference_sz, + OSSL_CALLBACK *export_cb, void *export_cbarg) +{ + struct pvk2key_ctx_st *ctx = vctx; + OSSL_FUNC_keymgmt_export_fn *export = + ossl_prov_get_keymgmt_export(ctx->desc->fns); + void *keydata; + + if (reference_sz == sizeof(keydata) && export != NULL) { + /* The contents of the reference is the address to our object */ + keydata = *(void **)reference; + + return export(keydata, OSSL_KEYMGMT_SELECT_ALL, + export_cb, export_cbarg); + } + return 0; +} + +/* ---------------------------------------------------------------------- */ + +#define dsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_DSA_PVK_bio +#define dsa_adjust NULL +#define dsa_free (void (*)(void *))DSA_free + +/* ---------------------------------------------------------------------- */ + +#define rsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_RSA_PVK_bio + +static void rsa_adjust(void *key, struct pvk2key_ctx_st *ctx) +{ + ossl_rsa_set0_libctx(key, PROV_LIBCTX_OF(ctx->provctx)); +} + +#define rsa_free (void (*)(void *))RSA_free + +/* ---------------------------------------------------------------------- */ + +#define IMPLEMENT_MS(KEYTYPE, keytype) \ + static const struct keytype_desc_st \ + pvk2##keytype##_desc = { \ + EVP_PKEY_##KEYTYPE, #KEYTYPE, \ + ossl_##keytype##_keymgmt_functions, \ + keytype##_private_key_bio, \ + keytype##_adjust, \ + keytype##_free \ + }; \ + static OSSL_FUNC_decoder_newctx_fn pvk2##keytype##_newctx; \ + static void *pvk2##keytype##_newctx(void *provctx) \ + { \ + return pvk2key_newctx(provctx, &pvk2##keytype##_desc); \ + } \ + const OSSL_DISPATCH \ + ossl_##pvk_to_##keytype##_decoder_functions[] = { \ + { OSSL_FUNC_DECODER_NEWCTX, \ + (void (*)(void))pvk2##keytype##_newctx }, \ + { OSSL_FUNC_DECODER_FREECTX, \ + (void (*)(void))pvk2key_freectx }, \ + { OSSL_FUNC_DECODER_GETTABLE_PARAMS, \ + (void (*)(void))pvk2key_gettable_params }, \ + { OSSL_FUNC_DECODER_GET_PARAMS, \ + (void (*)(void))pvk2key_get_params }, \ + { OSSL_FUNC_DECODER_DECODE, \ + (void (*)(void))pvk2key_decode }, \ + { OSSL_FUNC_DECODER_EXPORT_OBJECT, \ + (void (*)(void))pvk2key_export_object }, \ + { 0, NULL } \ + } + +#ifndef OPENSSL_NO_DSA +IMPLEMENT_MS(DSA, dsa); +#endif +IMPLEMENT_MS(RSA, rsa); -- cgit v1.2.3