SslPtr = ptr SslStruct

PSslPtr = ptr SslPtr

SslCtx = SslPtr

PSSL_METHOD = SslPtr

PSTACK = SslPtr

PX509 = SslPtr

PX509_NAME = SslPtr

PEVP_MD = SslPtr

PBIO_METHOD = SslPtr

BIO = SslPtr

EVP_PKEY = SslPtr

PRSA = SslPtr

PASN1_UTCTIME = SslPtr

PASN1_cInt = SslPtr

PPasswdCb = SslPtr

EVP_MD = SslPtr

EVP_MD_CTX = SslPtr

EVP_PKEY_CTX = SslPtr

ENGINE = SslPtr

PFunction = proc () {...}{.cdecl.}

DES_cblock = array[0 .. 7, int8]

PDES_cblock = ptr DES_cblock

des_ks_struct {...}{.final.} = object
  ks*: DES_cblock
  weak_key*: cint

des_key_schedule = array[1 .. 16, des_ks_struct]

pem_password_cb = proc (buf: cstring; size, rwflag: cint; userdata: pointer): cint {...}{.
    cdecl.}

PaddingType = enum
  RSA_PKCS1_PADDING = 1, RSA_SSLV23_PADDING = 2, RSA_NO_PADDING = 3,
  RSA_PKCS1_OAEP_PADDING = 4, RSA_X931_PADDING = 5, RSA_PKCS1_PSS_PADDING = 6

PskClientCallback = proc (ssl: SslPtr; hint: cstring; identity: cstring;
                          max_identity_len: cuint; psk: ptr cuchar;
                          max_psk_len: cuint): cuint {...}{.cdecl.}

PskServerCallback = proc (ssl: SslPtr; identity: cstring; psk: ptr cuchar;
                          max_psk_len: cint): cuint {...}{.cdecl.}

MD5_LONG = cuint

MD5_CTX = object
  A, B, C, D, Nl, Nh: MD5_LONG
  data: array[MD5_LBLOCK, MD5_LONG]
  num: cuint

PX509_STORE = SslPtr

PX509_OBJECT = SslPtr

DLLSSLName = "(libssl-1_1-x64|ssleay64|libssl64).dll"

DLLUtilName = "(libcrypto-1_1-x64|libeay64).dll"

SSL_SENT_SHUTDOWN = 1

SSL_RECEIVED_SHUTDOWN = 2

EVP_MAX_MD_SIZE = 36

SSL_ERROR_NONE = 0

SSL_ERROR_SSL = 1

SSL_ERROR_WANT_READ = 2

SSL_ERROR_WANT_WRITE = 3

SSL_ERROR_WANT_X509_LOOKUP = 4

SSL_ERROR_SYSCALL = 5

SSL_ERROR_ZERO_RETURN = 6

SSL_ERROR_WANT_CONNECT = 7

SSL_ERROR_WANT_ACCEPT = 8

SSL_CTRL_NEED_TMP_RSA = 1

SSL_CTRL_SET_TMP_RSA = 2

SSL_CTRL_SET_TMP_DH = 3

SSL_CTRL_SET_TMP_ECDH = 4

SSL_CTRL_SET_TMP_RSA_CB = 5

SSL_CTRL_SET_TMP_DH_CB = 6

SSL_CTRL_SET_TMP_ECDH_CB = 7

SSL_CTRL_GET_SESSION_REUSED = 8

SSL_CTRL_GET_CLIENT_CERT_REQUEST = 9

SSL_CTRL_GET_NUM_RENEGOTIATIONS = 10

SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS = 11

SSL_CTRL_GET_TOTAL_RENEGOTIATIONS = 12

SSL_CTRL_GET_FLAGS = 13

SSL_CTRL_EXTRA_CHAIN_CERT = 14

SSL_CTRL_SET_MSG_CALLBACK = 15

SSL_CTRL_SET_MSG_CALLBACK_ARG = 16

SSL_CTRL_SET_MTU = 17

SSL_CTRL_SESS_NUMBER = 20

SSL_CTRL_SESS_CONNECT = 21

SSL_CTRL_SESS_CONNECT_GOOD = 22

SSL_CTRL_SESS_CONNECT_RENEGOTIATE = 23

SSL_CTRL_SESS_ACCEPT = 24

SSL_CTRL_SESS_ACCEPT_GOOD = 25

SSL_CTRL_SESS_ACCEPT_RENEGOTIATE = 26

SSL_CTRL_SESS_HIT = 27

SSL_CTRL_SESS_CB_HIT = 28

SSL_CTRL_SESS_MISSES = 29

SSL_CTRL_SESS_TIMEOUTS = 30

SSL_CTRL_SESS_CACHE_FULL = 31

SSL_CTRL_OPTIONS = 32

SSL_CTRL_MODE = 33

SSL_CTRL_GET_READ_AHEAD = 40

SSL_CTRL_SET_READ_AHEAD = 41

SSL_CTRL_SET_SESS_CACHE_SIZE = 42

SSL_CTRL_GET_SESS_CACHE_SIZE = 43

SSL_CTRL_SET_SESS_CACHE_MODE = 44

SSL_CTRL_GET_SESS_CACHE_MODE = 45

SSL_CTRL_GET_MAX_CERT_LIST = 50

SSL_CTRL_SET_MAX_CERT_LIST = 51

SSL_CTRL_SET_ECDH_AUTO = 94

TLSEXT_NAMETYPE_host_name = 0

SSL_TLSEXT_ERR_OK = 0

SSL_TLSEXT_ERR_ALERT_WARNING = 1

SSL_TLSEXT_ERR_ALERT_FATAL = 2

SSL_TLSEXT_ERR_NOACK = 3

SSL_MODE_ENABLE_PARTIAL_WRITE = 1

SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER = 2

SSL_MODE_AUTO_RETRY = 4

SSL_MODE_NO_AUTO_CHAIN = 8

SSL_OP_NO_SSLv2 = 0x01000000

SSL_OP_NO_SSLv3 = 0x02000000

SSL_OP_NO_TLSv1 = 0x04000000

SSL_OP_NO_TLSv1_1 = 0x08000000

SSL_OP_ALL = 0x000FFFFF

SSL_VERIFY_NONE = 0x00000000

SSL_VERIFY_PEER = 0x00000001

SSL_ST_CONNECT = 0x00001000

SSL_ST_ACCEPT = 0x00002000

SSL_ST_INIT = 12288

OPENSSL_DES_DECRYPT = 0

OPENSSL_DES_ENCRYPT = 1

X509_V_OK = 0

X509_V_ILLEGAL = 1

X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT = 2

X509_V_ERR_UNABLE_TO_GET_CRL = 3

X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE = 4

X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE = 5

X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY = 6

X509_V_ERR_CERT_SIGNATURE_FAILURE = 7

X509_V_ERR_CRL_SIGNATURE_FAILURE = 8

X509_V_ERR_CERT_NOT_YET_VALID = 9

X509_V_ERR_CERT_HAS_EXPIRED = 10

X509_V_ERR_CRL_NOT_YET_VALID = 11

X509_V_ERR_CRL_HAS_EXPIRED = 12

X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD = 13

X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD = 14

X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD = 15

X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD = 16

X509_V_ERR_OUT_OF_MEM = 17

X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT = 18

X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN = 19

X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY = 20

X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE = 21

X509_V_ERR_CERT_CHAIN_TOO_LONG = 22

X509_V_ERR_CERT_REVOKED = 23

X509_V_ERR_INVALID_CA = 24

X509_V_ERR_PATH_LENGTH_EXCEEDED = 25

X509_V_ERR_INVALID_PURPOSE = 26

X509_V_ERR_CERT_UNTRUSTED = 27

X509_V_ERR_CERT_REJECTED = 28

X509_V_ERR_SUBJECT_ISSUER_MISMATCH = 29

X509_V_ERR_AKID_SKID_MISMATCH = 30

X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH = 31

X509_V_ERR_KEYUSAGE_NO_CERTSIGN = 32

X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER = 33

X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION = 34

X509_V_ERR_APPLICATION_VERIFICATION = 50

SSL_FILETYPE_ASN1 = 2

SSL_FILETYPE_PEM = 1

EVP_PKEY_RSA = 6

MD5_CBLOCK = 64

MD5_LBLOCK = 16

MD5_DIGEST_LENGTH = 16

proc TLSv1_method(): PSSL_METHOD {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_library_init(): cint {...}{.discardable, raises: [Exception, LibraryError],
                                tags: [RootEffect].}

proc SSL_load_error_strings() {...}{.raises: [Exception], tags: [RootEffect].}

proc SSLv23_client_method(): PSSL_METHOD {...}{.raises: [Exception, LibraryError],
    tags: [RootEffect].}

proc SSLv23_method(): PSSL_METHOD {...}{.raises: [Exception, LibraryError],
                                    tags: [RootEffect].}

proc SSLv2_method(): PSSL_METHOD {...}{.raises: [Exception, LibraryError],
                                   tags: [RootEffect].}

proc SSLv3_method(): PSSL_METHOD {...}{.raises: [Exception, LibraryError],
                                   tags: [RootEffect].}

proc TLS_method(): PSSL_METHOD {...}{.raises: [Exception, LibraryError],
                                 tags: [RootEffect].}

proc TLS_client_method(): PSSL_METHOD {...}{.raises: [Exception, LibraryError],
                                        tags: [RootEffect].}

proc TLS_server_method(): PSSL_METHOD {...}{.raises: [Exception, LibraryError],
                                        tags: [RootEffect].}

proc OpenSSL_add_all_algorithms() {...}{.raises: [Exception], tags: [RootEffect].}

proc getOpenSSLVersion(): culong {...}{.raises: [Exception], tags: [RootEffect].}

proc SSL_in_init(ssl: SslPtr): cint {...}{.raises: [Exception, LibraryError],
                                      tags: [RootEffect].}

proc SSL_CTX_set_ciphersuites(ctx: SslCtx; str: cstring): cint {...}{.
    raises: [Exception, LibraryError], tags: [RootEffect].}

proc ERR_load_BIO_strings() {...}{.cdecl, dynlib: DLLUtilName, importc.}

proc SSL_new(context: SslCtx): SslPtr {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_free(ssl: SslPtr) {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_get_SSL_CTX(ssl: SslPtr): SslCtx {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_set_SSL_CTX(ssl: SslPtr; ctx: SslCtx): SslCtx {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_CTX_set_session_id_context(context: SslCtx; sid_ctx: string;
                                    sid_ctx_len: int) {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_get0_verified_chain(ssl: SslPtr): PSTACK {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc SSL_CTX_new(meth: PSSL_METHOD): SslCtx {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_CTX_load_verify_locations(ctx: SslCtx; CAfile: cstring; CApath: cstring): cint {...}{.
    cdecl, dynlib: DLLSSLName, importc.}

proc SSL_CTX_free(arg0: SslCtx) {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_CTX_set_verify(s: SslCtx; mode: int;
                        cb: proc (a: int; b: pointer): int {...}{.cdecl.}) {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_get_verify_result(ssl: SslPtr): int {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc SSL_CTX_set_cipher_list(s: SslCtx; ciphers: cstring): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_CTX_use_certificate_file(ctx: SslCtx; filename: cstring; typ: cint): cint {...}{.
    stdcall, dynlib: DLLSSLName, importc.}

proc SSL_CTX_use_certificate_chain_file(ctx: SslCtx; filename: cstring): cint {...}{.
    stdcall, dynlib: DLLSSLName, importc.}

proc SSL_CTX_use_PrivateKey_file(ctx: SslCtx; filename: cstring; typ: cint): cint {...}{.
    cdecl, dynlib: DLLSSLName, importc.}

proc SSL_CTX_check_private_key(ctx: SslCtx): cint {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc SSL_CTX_get_ex_new_index(argl: clong; argp: pointer; new_func: pointer;
                              dup_func: pointer; free_func: pointer): cint {...}{.
    cdecl, dynlib: DLLSSLName, importc.}

proc SSL_CTX_set_ex_data(ssl: SslCtx; idx: cint; arg: pointer): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_CTX_get_ex_data(ssl: SslCtx; idx: cint): pointer {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_set_fd(ssl: SslPtr; fd: SocketHandle): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_shutdown(ssl: SslPtr): cint {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_set_shutdown(ssl: SslPtr; mode: cint) {...}{.cdecl, dynlib: DLLSSLName,
    importc: "SSL_set_shutdown".}

proc SSL_get_shutdown(ssl: SslPtr): cint {...}{.cdecl, dynlib: DLLSSLName,
    importc: "SSL_get_shutdown".}

proc SSL_connect(ssl: SslPtr): cint {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_read(ssl: SslPtr; buf: pointer; num: int): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_write(ssl: SslPtr; buf: cstring; num: int): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_get_error(s: SslPtr; ret_code: cint): cint {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc SSL_accept(ssl: SslPtr): cint {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc SSL_pending(ssl: SslPtr): cint {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc BIO_new_mem_buf(data: pointer; len: cint): BIO {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc BIO_new_ssl_connect(ctx: SslCtx): BIO {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc BIO_ctrl(bio: BIO; cmd: cint; larg: int; arg: cstring): int {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc BIO_get_ssl(bio: BIO; ssl: ptr SslPtr): int {...}{.raises: [], tags: [].}

proc BIO_set_conn_hostname(bio: BIO; name: cstring): int {...}{.raises: [], tags: [].}

proc BIO_do_handshake(bio: BIO): int {...}{.raises: [], tags: [].}

proc BIO_do_connect(bio: BIO): int {...}{.raises: [], tags: [].}

proc BIO_read(b: BIO; data: cstring; length: cint): cint {...}{.cdecl,
    dynlib: DLLUtilName, importc.}

proc BIO_write(b: BIO; data: cstring; length: cint): cint {...}{.cdecl,
    dynlib: DLLUtilName, importc.}

proc BIO_free(b: BIO): cint {...}{.cdecl, dynlib: DLLUtilName, importc.}

proc ERR_print_errors_fp(fp: File) {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc ERR_error_string(e: culong; buf: cstring): cstring {...}{.cdecl,
    dynlib: DLLUtilName, importc.}

proc ERR_get_error(): culong {...}{.cdecl, dynlib: DLLUtilName, importc.}

proc ERR_peek_last_error(): culong {...}{.cdecl, dynlib: DLLUtilName, importc.}

proc OPENSSL_config(configName: cstring) {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc OPENSSL_sk_num(stack: PSTACK): int {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc OPENSSL_sk_value(stack: PSTACK; index: int): pointer {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc d2i_X509(px: ptr PX509; i: ptr ptr cuchar; len: cint): PX509 {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc i2d_X509(cert: PX509; o: ptr ptr cuchar): cint {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc d2i_X509(b: string): PX509 {...}{.raises: [Exception], tags: [].}

proc i2d_X509(cert: PX509): string {...}{.raises: [Exception], tags: [].}

proc CRYPTO_malloc_init() {...}{.raises: [], tags: [].}

proc SSL_CTX_ctrl(ctx: SslCtx; cmd: cint; larg: clong; parg: pointer): clong {...}{.
    cdecl, dynlib: DLLSSLName, importc.}

proc SSLCTXSetMode(ctx: SslCtx; mode: int): int {...}{.raises: [], tags: [].}

proc SSL_ctrl(ssl: SslPtr; cmd: cint; larg: int; parg: pointer): int {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_set_tlsext_host_name(ssl: SslPtr; name: cstring): int {...}{.raises: [],
    tags: [].}

proc SSL_get_servername(ssl: SslPtr; typ: cint = TLSEXT_NAMETYPE_host_name): cstring {...}{.
    cdecl, dynlib: DLLSSLName, importc.}

proc SSL_CTX_set_tlsext_servername_callback(ctx: SslCtx;
    cb: proc (ssl: SslPtr; cb_id: int; arg: pointer): int {...}{.cdecl.}): int {...}{.
    raises: [], tags: [].}

proc SSL_CTX_set_tlsext_servername_arg(ctx: SslCtx; arg: pointer): int {...}{.
    raises: [], tags: [].}

proc SSL_CTX_set_psk_client_callback(ctx: SslCtx; callback: PskClientCallback) {...}{.
    cdecl, dynlib: DLLSSLName, importc.}

proc SSL_CTX_set_psk_server_callback(ctx: SslCtx; callback: PskServerCallback) {...}{.
    cdecl, dynlib: DLLSSLName, importc.}

proc SSL_CTX_use_psk_identity_hint(ctx: SslCtx; hint: cstring): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc SSL_get_psk_identity(ssl: SslPtr): cstring {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc SSL_CTX_set_ecdh_auto(ctx: SslCtx; onoff: cint): cint {...}{.inline,
    raises: [Exception], tags: [RootEffect].}

proc bioNew(b: PBIO_METHOD): BIO {...}{.cdecl, dynlib: DLLUtilName,
                                   importc: "BIO_new".}

proc bioFreeAll(b: BIO) {...}{.cdecl, dynlib: DLLUtilName, importc: "BIO_free_all".}

proc bioSMem(): PBIO_METHOD {...}{.cdecl, dynlib: DLLUtilName, importc: "BIO_s_mem".}

proc bioCtrlPending(b: BIO): cint {...}{.cdecl, dynlib: DLLUtilName,
                                    importc: "BIO_ctrl_pending".}

proc bioRead(b: BIO; Buf: cstring; length: cint): cint {...}{.cdecl,
    dynlib: DLLUtilName, importc: "BIO_read".}

proc bioWrite(b: BIO; Buf: cstring; length: cint): cint {...}{.cdecl,
    dynlib: DLLUtilName, importc: "BIO_write".}

proc sslSetConnectState(s: SslPtr) {...}{.cdecl, dynlib: DLLSSLName,
                                     importc: "SSL_set_connect_state".}

proc sslSetAcceptState(s: SslPtr) {...}{.cdecl, dynlib: DLLSSLName,
                                    importc: "SSL_set_accept_state".}

proc sslRead(ssl: SslPtr; buf: cstring; num: cint): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc: "SSL_read".}

proc sslPeek(ssl: SslPtr; buf: cstring; num: cint): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc: "SSL_peek".}

proc sslWrite(ssl: SslPtr; buf: cstring; num: cint): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc: "SSL_write".}

proc sslSetBio(ssl: SslPtr; rbio, wbio: BIO) {...}{.cdecl, dynlib: DLLSSLName,
    importc: "SSL_set_bio".}

proc sslDoHandshake(ssl: SslPtr): cint {...}{.cdecl, dynlib: DLLSSLName,
    importc: "SSL_do_handshake".}

proc ErrClearError() {...}{.cdecl, dynlib: DLLUtilName, importc: "ERR_clear_error".}

proc ErrFreeStrings() {...}{.cdecl, dynlib: DLLUtilName, importc: "ERR_free_strings".}

proc ErrRemoveState(pid: cint) {...}{.cdecl, dynlib: DLLUtilName,
                                 importc: "ERR_remove_state".}

proc PEM_read_bio_RSA_PUBKEY(bp: BIO; x: ptr PRSA; pw: pem_password_cb;
                             u: pointer): PRSA {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc RSA_verify(kind: cint; origMsg: pointer; origMsgLen: cuint;
                signature: pointer; signatureLen: cuint; rsa: PRSA): cint {...}{.
    cdecl, dynlib: DLLSSLName, importc.}

proc PEM_read_RSAPrivateKey(fp: pointer; x: ptr PRSA; cb: pem_password_cb;
                            u: pointer): PRSA {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc PEM_read_RSAPublicKey(fp: pointer; x: ptr PRSA; cb: pem_password_cb;
                           u: pointer): PRSA {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc PEM_read_bio_RSAPublicKey(bp: BIO; x: ptr PRSA; cb: pem_password_cb;
                               u: pointer): PRSA {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc PEM_read_bio_RSAPrivateKey(bp: BIO; x: ptr PRSA; cb: pem_password_cb;
                                u: pointer): PRSA {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc RSA_private_encrypt(flen: cint; fr: ptr cuchar; to: ptr cuchar; rsa: PRSA;
                         padding: PaddingType): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc RSA_public_encrypt(flen: cint; fr: ptr cuchar; to: ptr cuchar; rsa: PRSA;
                        padding: PaddingType): cint {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc RSA_private_decrypt(flen: cint; fr: ptr cuchar; to: ptr cuchar; rsa: PRSA;
                         padding: PaddingType): cint {...}{.cdecl,
    dynlib: DLLSSLName, importc.}

proc RSA_public_decrypt(flen: cint; fr: ptr cuchar; to: ptr cuchar; rsa: PRSA;
                        padding: PaddingType): cint {...}{.cdecl, dynlib: DLLSSLName,
    importc.}

proc RSA_free(rsa: PRSA) {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc RSA_size(rsa: PRSA): cint {...}{.cdecl, dynlib: DLLSSLName, importc.}

proc EVP_md_null(): EVP_MD {...}{.cdecl, importc.}

proc EVP_md2(): EVP_MD {...}{.cdecl, importc.}

proc EVP_md4(): EVP_MD {...}{.cdecl, importc.}

proc EVP_md5(): EVP_MD {...}{.cdecl, importc.}

proc EVP_sha(): EVP_MD {...}{.cdecl, importc.}

proc EVP_sha1(): EVP_MD {...}{.cdecl, importc.}

proc EVP_dss(): EVP_MD {...}{.cdecl, importc.}

proc EVP_dss1(): EVP_MD {...}{.cdecl, importc.}

proc EVP_ecdsa(): EVP_MD {...}{.cdecl, importc.}

proc EVP_sha224(): EVP_MD {...}{.cdecl, importc.}

proc EVP_sha256(): EVP_MD {...}{.cdecl, importc.}

proc EVP_sha384(): EVP_MD {...}{.cdecl, importc.}

proc EVP_sha512(): EVP_MD {...}{.cdecl, importc.}

proc EVP_mdc2(): EVP_MD {...}{.cdecl, importc.}

proc EVP_ripemd160(): EVP_MD {...}{.cdecl, importc.}

proc EVP_whirlpool(): EVP_MD {...}{.cdecl, importc.}

proc EVP_MD_size(md: EVP_MD): cint {...}{.cdecl, importc.}

proc HMAC(evp_md: EVP_MD; key: pointer; key_len: cint; d: cstring; n: csize_t;
          md: cstring; md_len: ptr cuint): cstring {...}{.cdecl, importc.}

proc PEM_read_bio_PrivateKey(bp: BIO; x: ptr EVP_PKEY; cb: pointer; u: pointer): EVP_PKEY {...}{.
    cdecl, importc.}

proc EVP_PKEY_free(p: EVP_PKEY) {...}{.cdecl, importc.}

proc EVP_DigestSignInit(ctx: EVP_MD_CTX; pctx: ptr EVP_PKEY_CTX; typ: EVP_MD;
                        e: ENGINE; pkey: EVP_PKEY): cint {...}{.cdecl, importc.}

proc EVP_DigestInit_ex(ctx: EVP_MD_CTX; typ: PEVP_MD; engine: SslPtr = nil): cint {...}{.
    cdecl, importc.}

proc EVP_DigestUpdate(ctx: EVP_MD_CTX; data: pointer; len: cuint): cint {...}{.cdecl,
    importc.}

proc EVP_DigestFinal_ex(ctx: EVP_MD_CTX; buffer: pointer; size: ptr cuint): cint {...}{.
    cdecl, importc.}

proc EVP_DigestSignFinal(ctx: EVP_MD_CTX; data: pointer; len: ptr csize_t): cint {...}{.
    cdecl, importc.}

proc EVP_PKEY_CTX_new(pkey: EVP_PKEY; e: ENGINE): EVP_PKEY_CTX {...}{.cdecl, importc.}

proc EVP_PKEY_CTX_free(pkeyCtx: EVP_PKEY_CTX) {...}{.cdecl, importc.}

proc EVP_PKEY_sign_init(c: EVP_PKEY_CTX): cint {...}{.cdecl, importc.}

proc EVP_MD_CTX_create(): EVP_MD_CTX {...}{.cdecl, importc: "EVP_MD_CTX_new".}

proc EVP_MD_CTX_destroy(ctx: EVP_MD_CTX) {...}{.cdecl, importc: "EVP_MD_CTX_free".}

proc EVP_MD_CTX_cleanup(ctx: EVP_MD_CTX): cint {...}{.cdecl,
    importc: "EVP_MD_CTX_cleanup".}

proc md5_Init(c: var MD5_CTX): cint {...}{.importc: "MD5_Init".}

proc md5_Update(c: var MD5_CTX; data: pointer; len: csize_t): cint {...}{.
    importc: "MD5_Update".}