diff options
Diffstat (limited to 'libqpdf/QPDFCrypto_openssl.cc')
-rw-r--r-- | libqpdf/QPDFCrypto_openssl.cc | 61 |
1 files changed, 56 insertions, 5 deletions
diff --git a/libqpdf/QPDFCrypto_openssl.cc b/libqpdf/QPDFCrypto_openssl.cc index 358040d5..427ce5bb 100644 --- a/libqpdf/QPDFCrypto_openssl.cc +++ b/libqpdf/QPDFCrypto_openssl.cc @@ -4,11 +4,20 @@ #include <stdexcept> #include <string> +#if (defined(__GNUC__) || defined(__clang__)) +# pragma GCC diagnostic push +# pragma GCC diagnostic ignored "-Wold-style-cast" +#endif #include <openssl/err.h> +#ifndef QPDF_OPENSSL_1 +# include <openssl/provider.h> +#endif +#if (defined(__GNUC__) || defined(__clang__)) +# pragma GCC diagnostic pop +#endif #include <qpdf/QIntC.hh> - static void bad_bits(int bits) { @@ -33,8 +42,35 @@ check_openssl(int status) } QPDFCrypto_openssl::QPDFCrypto_openssl() : - md_ctx(EVP_MD_CTX_new()), cipher_ctx(EVP_CIPHER_CTX_new()) +#ifdef QPDF_OPENSSL_1 + rc4(EVP_rc4()), +#endif + md_ctx(EVP_MD_CTX_new()), + cipher_ctx(EVP_CIPHER_CTX_new()) { +#ifndef QPDF_OPENSSL_1 + libctx = OSSL_LIB_CTX_new(); + if (libctx == nullptr) + { + throw std::runtime_error("unable to create openssl library context"); + return; + } + legacy = OSSL_PROVIDER_load(libctx, "legacy"); + if (legacy == nullptr) + { + OSSL_LIB_CTX_free(libctx); + throw std::runtime_error("unable to load openssl legacy provider"); + return; + } + rc4 = EVP_CIPHER_fetch(libctx, "RC4", nullptr); + if (rc4 == nullptr) + { + OSSL_PROVIDER_unload(legacy); + OSSL_LIB_CTX_free(libctx); + throw std::runtime_error("unable to load openssl rc4 algorithm"); + return; + } +#endif memset(md_out, 0, sizeof(md_out)); EVP_MD_CTX_init(md_ctx); EVP_CIPHER_CTX_init(cipher_ctx); @@ -45,6 +81,11 @@ QPDFCrypto_openssl::~QPDFCrypto_openssl() EVP_MD_CTX_reset(md_ctx); EVP_CIPHER_CTX_reset(cipher_ctx); EVP_CIPHER_CTX_free(cipher_ctx); +#ifndef QPDF_OPENSSL_1 + EVP_CIPHER_free(rc4); + OSSL_PROVIDER_unload(legacy); + OSSL_LIB_CTX_free(libctx); +#endif EVP_MD_CTX_free(md_ctx); } @@ -100,7 +141,12 @@ QPDFCrypto_openssl::SHA2_update(unsigned char const* data, size_t len) void QPDFCrypto_openssl::MD5_finalize() { - if (EVP_MD_CTX_md(md_ctx)) +#ifdef QPDF_OPENSSL_1 + auto md = EVP_MD_CTX_md(md_ctx); +#else + auto md = EVP_MD_CTX_get0_md(md_ctx); +#endif + if (md) { check_openssl(EVP_DigestFinal(md_ctx, md_out + 0, nullptr)); } @@ -109,7 +155,12 @@ QPDFCrypto_openssl::MD5_finalize() void QPDFCrypto_openssl::SHA2_finalize() { - if (EVP_MD_CTX_md(md_ctx)) +#ifdef QPDF_OPENSSL_1 + auto md = EVP_MD_CTX_md(md_ctx); +#else + auto md = EVP_MD_CTX_get0_md(md_ctx); +#endif + if (md) { check_openssl(EVP_DigestFinal(md_ctx, md_out + 0, nullptr)); } @@ -137,7 +188,7 @@ QPDFCrypto_openssl::RC4_init(unsigned char const* key_data, int key_len) strlen(reinterpret_cast<const char*>(key_data))); } check_openssl( - EVP_EncryptInit_ex(cipher_ctx, EVP_rc4(), nullptr, nullptr, nullptr)); + EVP_EncryptInit_ex(cipher_ctx, rc4, nullptr, nullptr, nullptr)); check_openssl(EVP_CIPHER_CTX_set_key_length(cipher_ctx, key_len)); check_openssl( EVP_EncryptInit_ex(cipher_ctx, nullptr, nullptr, key_data, nullptr)); |