std/openssl

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OpenSSL support

When OpenSSL is dynamically linked, the wrapper provides partial forward and backward compatibility for OpenSSL versions above and below 1.1.0

OpenSSL can also be statically linked using --dynlibOverride:ssl for OpenSSL >= 1.1.0. If you want to statically link against OpenSSL 1.0.x, you now have to define the openssl10 symbol via -d:openssl10.

Build and test examples:

./bin/nim c -d:ssl -p:. -r tests/untestable/tssl.nim
./bin/nim c -d:ssl -p:. --dynlibOverride:ssl --passl:-lcrypto --passl:-lssl -r tests/untestable/tssl.nim

Types

BIO = SslPtr
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DES_cblock = array[0 .. 7, int8]
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des_ks_struct {.final.} = object
  ks*: DES_cblock
  weak_key*: cint
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ENGINE = SslPtr
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EVP_MD = SslPtr
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MD5_CTX = object
  A, B, C, D, Nl, Nh: MD5_LONG
  data: array[MD5_LBLOCK, MD5_LONG]
  num: cuint
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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
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pem_password_cb = proc (buf: cstring; size, rwflag: cint; userdata: pointer): cint {.
    cdecl.}
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PFunction = proc () {.cdecl.}
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PRSA = SslPtr
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PskClientCallback = proc (ssl: SslPtr; hint: cstring; identity: cstring;
                          max_identity_len: cuint; psk: ptr uint8;
                          max_psk_len: cuint): cuint {.cdecl.}
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PskServerCallback = proc (ssl: SslPtr; identity: cstring; psk: ptr uint8;
                          max_psk_len: cint): cuint {.cdecl.}
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PSslPtr = ptr SslPtr
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PSTACK = SslPtr
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PX509 = SslPtr
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SslCtx = SslPtr
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SslPtr = ptr SslStruct
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Consts

DLLSSLName = "(libssl-1_1-x64|ssleay64|libssl64).dll"
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DLLUtilName = "(libcrypto-1_1-x64|libeay64).dll"
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EVP_MAX_MD_SIZE = 36
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EVP_PKEY_RSA = 6
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MD5_CBLOCK = 64
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MD5_LBLOCK = 16
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SSL_CTRL_MODE = 33
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SSL_ERROR_NONE = 0
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SSL_ERROR_SSL = 1
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SSL_OP_ALL = 0x000FFFFF
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SSL_OP_NO_SSLv2 = 0x01000000
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SSL_OP_NO_SSLv3 = 0x02000000
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SSL_OP_NO_TLSv1 = 0x04000000
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SSL_OP_NO_TLSv1_1 = 0x08000000
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SSL_ST_ACCEPT = 0x00002000
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SSL_ST_CONNECT = 0x00001000
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SSL_ST_INIT = 12288
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SSL_VERIFY_NONE = 0x00000000
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SSL_VERIFY_PEER = 0x00000001
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X509_V_ILLEGAL = 1
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X509_V_OK = 0
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Procs

proc BIO_ctrl(bio: BIO; cmd: cint; larg: int; arg: cstring): int {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc BIO_do_connect(bio: BIO): int {....raises: [], tags: [].}
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proc BIO_do_handshake(bio: BIO): int {....raises: [], tags: [].}
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proc BIO_free(b: BIO): cint {.cdecl, dynlib: DLLUtilName, importc, ...raises: [],
                              tags: [].}
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proc BIO_get_ssl(bio: BIO; ssl: ptr SslPtr): int {....raises: [], tags: [].}
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proc BIO_new_mem_buf(data: pointer; len: cint): BIO {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc BIO_new_ssl_connect(ctx: SslCtx): BIO {.cdecl, dynlib: DLLSSLName, importc,
    ...raises: [], tags: [].}
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proc BIO_read(b: BIO; data: cstring; length: cint): cint {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc BIO_set_conn_hostname(bio: BIO; name: cstring): int {....raises: [], tags: [].}
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proc BIO_write(b: BIO; data: cstring; length: cint): cint {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc bioCtrlPending(b: BIO): cint {.cdecl, dynlib: DLLUtilName,
                                    importc: "BIO_ctrl_pending", ...raises: [],
                                    tags: [].}
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proc bioFreeAll(b: BIO) {.cdecl, dynlib: DLLUtilName, importc: "BIO_free_all",
                          ...raises: [], tags: [].}
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proc bioNew(b: PBIO_METHOD): BIO {.cdecl, dynlib: DLLUtilName,
                                   importc: "BIO_new", ...raises: [], tags: [].}
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proc bioRead(b: BIO; Buf: cstring; length: cint): cint {.cdecl,
    dynlib: DLLUtilName, importc: "BIO_read", ...raises: [], tags: [].}
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proc bioSMem(): PBIO_METHOD {.cdecl, dynlib: DLLUtilName, importc: "BIO_s_mem",
                              ...raises: [], tags: [].}
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proc bioWrite(b: BIO; Buf: cstring; length: cint): cint {.cdecl,
    dynlib: DLLUtilName, importc: "BIO_write", ...raises: [], tags: [].}
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proc CRYPTO_malloc_init() {....raises: [], tags: [].}
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proc d2i_X509(b: string): PX509 {....raises: [Exception], tags: [].}
decode DER/BER bytestring into X.509 certificate struct   Source   Edit
proc d2i_X509(px: ptr PX509; i: ptr ptr uint8; len: cint): PX509 {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc ERR_error_string(e: culong; buf: cstring): cstring {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc ERR_get_error(): culong {.cdecl, dynlib: DLLUtilName, importc, ...raises: [],
                               tags: [].}
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proc ERR_load_BIO_strings() {.cdecl, dynlib: DLLUtilName, importc, ...raises: [],
                              tags: [].}
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proc ERR_peek_last_error(): culong {.cdecl, dynlib: DLLUtilName, importc,
                                     ...raises: [], tags: [].}
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proc ERR_print_errors_fp(fp: File) {.cdecl, dynlib: DLLUtilName, importc,
                                     ...raises: [], tags: [].}
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proc ErrClearError() {.cdecl, dynlib: DLLUtilName, importc: "ERR_clear_error",
                       ...raises: [], tags: [].}
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proc ErrFreeStrings() {.cdecl, dynlib: DLLUtilName, importc: "ERR_free_strings",
                        ...raises: [], tags: [].}
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proc ErrRemoveState(pid: cint) {.cdecl, dynlib: DLLUtilName,
                                 importc: "ERR_remove_state", ...raises: [],
                                 tags: [].}
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proc EVP_DigestFinal_ex(ctx: EVP_MD_CTX; buffer: pointer; size: ptr cuint): cint {.
    cdecl, importc, ...raises: [], tags: [].}
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proc EVP_DigestInit_ex(ctx: EVP_MD_CTX; typ: PEVP_MD; engine: SslPtr = nil): cint {.
    cdecl, importc, ...raises: [], tags: [].}
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proc EVP_DigestSignFinal(ctx: EVP_MD_CTX; data: pointer; len: ptr csize_t): cint {.
    cdecl, importc, ...raises: [], tags: [].}
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proc EVP_DigestSignInit(ctx: EVP_MD_CTX; pctx: ptr EVP_PKEY_CTX; typ: EVP_MD;
                        e: ENGINE; pkey: EVP_PKEY): cint {.cdecl, importc,
    ...raises: [], tags: [].}
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proc EVP_DigestUpdate(ctx: EVP_MD_CTX; data: pointer; len: cuint): cint {.cdecl,
    importc, ...raises: [], tags: [].}
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proc EVP_dss(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_dss1(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_ecdsa(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_md2(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_md4(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_md5(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_MD_CTX_cleanup(ctx: EVP_MD_CTX): cint {.cdecl, importc, ...raises: [],
    tags: [].}
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proc EVP_MD_CTX_create(): EVP_MD_CTX {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_MD_CTX_destroy(ctx: EVP_MD_CTX) {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_md_null(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_MD_size(md: EVP_MD): cint {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_mdc2(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_PKEY_CTX_free(pkeyCtx: EVP_PKEY_CTX) {.cdecl, importc, ...raises: [],
    tags: [].}
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proc EVP_PKEY_CTX_new(pkey: EVP_PKEY; e: ENGINE): EVP_PKEY_CTX {.cdecl, importc,
    ...raises: [], tags: [].}
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proc EVP_PKEY_free(p: EVP_PKEY) {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_PKEY_sign_init(c: EVP_PKEY_CTX): cint {.cdecl, importc, ...raises: [],
    tags: [].}
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proc EVP_ripemd160(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_sha(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_sha1(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_sha224(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_sha256(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_sha384(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_sha512(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc EVP_whirlpool(): EVP_MD {.cdecl, importc, ...raises: [], tags: [].}
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proc getOpenSSLVersion(): culong {....raises: [Exception], tags: [RootEffect].}
Return OpenSSL version as unsigned long or 0 if not available   Source   Edit
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, ...raises: [],
    tags: [].}
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proc i2d_X509(cert: PX509): string {....raises: [Exception], tags: [].}
encode cert to DER string   Source   Edit
proc i2d_X509(cert: PX509; o: ptr ptr uint8): cint {.cdecl, dynlib: DLLUtilName,
    importc, ...raises: [], tags: [].}
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proc md5(d: ptr uint8; n: csize_t; md: ptr uint8): ptr uint8 {.importc: "MD5",
    ...raises: [], tags: [].}
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proc md5_File(file: string): string {....raises: [IOError, Exception],
                                      tags: [ReadIOEffect].}
Generate MD5 hash for a file. Result is a 32 character   Source   Edit
proc md5_Final(md: cstring; c: var MD5_CTX): cint {.importc: "MD5_Final",
    ...raises: [], tags: [].}
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proc md5_Init(c: var MD5_CTX): cint {.importc: "MD5_Init", ...raises: [], tags: [].}
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proc md5_Str(str: string): string {....raises: [], tags: [].}
Generate MD5 hash for a string. Result is a 32 character hex string with lowercase characters   Source   Edit
proc md5_Transform(c: var MD5_CTX; b: ptr uint8) {.importc: "MD5_Transform",
    ...raises: [], tags: [].}
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proc md5_Update(c: var MD5_CTX; data: pointer; len: csize_t): cint {.
    importc: "MD5_Update", ...raises: [], tags: [].}
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proc OpenSSL_add_all_algorithms() {....raises: [Exception], tags: [RootEffect].}
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proc OPENSSL_config(configName: cstring) {.cdecl, dynlib: DLLUtilName, importc,
    ...raises: [], tags: [].}
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proc OPENSSL_sk_num(stack: PSTACK): int {.cdecl, dynlib: DLLSSLName, importc,
    ...raises: [], tags: [].}
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proc OPENSSL_sk_value(stack: PSTACK; index: int): pointer {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc PEM_read_bio_PrivateKey(bp: BIO; x: ptr EVP_PKEY; cb: pointer; u: pointer): EVP_PKEY {.
    cdecl, importc, ...raises: [], tags: [].}
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proc PEM_read_bio_RSA_PUBKEY(bp: BIO; x: ptr PRSA; pw: pem_password_cb;
                             u: pointer): PRSA {.cdecl, dynlib: DLLUtilName,
    importc, ...raises: [], tags: [].}
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proc PEM_read_bio_RSAPrivateKey(bp: BIO; x: ptr PRSA; cb: pem_password_cb;
                                u: pointer): PRSA {.cdecl, dynlib: DLLUtilName,
    importc, ...raises: [], tags: [].}
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proc PEM_read_bio_RSAPublicKey(bp: BIO; x: ptr PRSA; cb: pem_password_cb;
                               u: pointer): PRSA {.cdecl, dynlib: DLLUtilName,
    importc, ...raises: [], tags: [].}
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proc PEM_read_RSA_PUBKEY(fp: pointer; x: ptr PRSA; cb: pem_password_cb;
                         u: pointer): PRSA {.cdecl, dynlib: DLLUtilName,
    importc, ...raises: [], tags: [].}
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proc PEM_read_RSAPrivateKey(fp: pointer; x: ptr PRSA; cb: pem_password_cb;
                            u: pointer): PRSA {.cdecl, dynlib: DLLUtilName,
    importc, ...raises: [], tags: [].}
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proc PEM_read_RSAPublicKey(fp: pointer; x: ptr PRSA; cb: pem_password_cb;
                           u: pointer): PRSA {.cdecl, dynlib: DLLUtilName,
    importc, ...raises: [], tags: [].}
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proc RSA_free(rsa: PRSA) {.cdecl, dynlib: DLLUtilName, importc, ...raises: [],
                           tags: [].}
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proc RSA_private_decrypt(flen: cint; fr: ptr uint8; to: ptr uint8; rsa: PRSA;
                         padding: PaddingType): cint {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc RSA_private_encrypt(flen: cint; fr: ptr uint8; to: ptr uint8; rsa: PRSA;
                         padding: PaddingType): cint {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc RSA_public_decrypt(flen: cint; fr: ptr uint8; to: ptr uint8; rsa: PRSA;
                        padding: PaddingType): cint {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc RSA_public_encrypt(flen: cint; fr: ptr uint8; to: ptr uint8; rsa: PRSA;
                        padding: PaddingType): cint {.cdecl,
    dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc RSA_size(rsa: PRSA): cint {.cdecl, dynlib: DLLUtilName, importc,
                                 ...raises: [], tags: [].}
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proc RSA_verify(kind: cint; origMsg: pointer; origMsgLen: cuint;
                signature: pointer; signatureLen: cuint; rsa: PRSA): cint {.
    cdecl, dynlib: DLLUtilName, importc, ...raises: [], tags: [].}
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proc SSL_accept(ssl: SslPtr): cint {.cdecl, dynlib: DLLSSLName, importc,
                                     ...raises: [], tags: [].}
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proc SSL_connect(ssl: SslPtr): cint {.cdecl, dynlib: DLLSSLName, importc,
                                      ...raises: [], tags: [].}
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proc SSL_ctrl(ssl: SslPtr; cmd: cint; larg: int; parg: pointer): int {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc SSL_CTX_check_private_key(ctx: SslCtx): cint {.cdecl, dynlib: DLLSSLName,
    importc, ...raises: [], tags: [].}
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proc SSL_CTX_ctrl(ctx: SslCtx; cmd: cint; larg: clong; parg: pointer): clong {.
    cdecl, dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc SSL_CTX_free(arg0: SslCtx) {.cdecl, dynlib: DLLSSLName, importc,
                                  ...raises: [], tags: [].}
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proc SSL_CTX_get_ex_data(ssl: SslCtx; idx: cint): pointer {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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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, ...raises: [], tags: [].}
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proc SSL_CTX_load_verify_locations(ctx: SslCtx; CAfile: cstring; CApath: cstring): cint {.
    cdecl, dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc SSL_CTX_new(meth: PSSL_METHOD): SslCtx {.cdecl, dynlib: DLLSSLName,
    importc, ...raises: [], tags: [].}
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proc SSL_CTX_set_cipher_list(s: SslCtx; ciphers: cstring): cint {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc SSL_CTX_set_ciphersuites(ctx: SslCtx; str: cstring): cint {.
    ...raises: [Exception, LibraryError], tags: [RootEffect].}
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proc SSL_CTX_set_ecdh_auto(ctx: SslCtx; onoff: cint): cint {.inline,
    ...raises: [Exception], tags: [RootEffect].}

Set automatic curve selection.

On OpenSSL >= 1.1.0 this is on by default and cannot be disabled.

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proc SSL_CTX_set_ex_data(ssl: SslCtx; idx: cint; arg: pointer): cint {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc SSL_CTX_set_psk_client_callback(ctx: SslCtx; callback: PskClientCallback) {.
    cdecl, dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
Set callback called when OpenSSL needs PSK (for client).   Source   Edit
proc SSL_CTX_set_psk_server_callback(ctx: SslCtx; callback: PskServerCallback) {.
    cdecl, dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
Set callback called when OpenSSL needs PSK (for server).   Source   Edit
proc SSL_CTX_set_session_id_context(context: SslCtx; sid_ctx: string;
                                    sid_ctx_len: int) {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
  Source   Edit
proc SSL_CTX_set_tlsext_servername_arg(ctx: SslCtx; arg: pointer): int {.
    ...raises: [], tags: [].}
Set the pointer to be used in the callback registered to SSL_CTX_set_tlsext_servername_callback.   Source   Edit
proc SSL_CTX_set_tlsext_servername_callback(ctx: SslCtx;
    cb: proc (ssl: SslPtr; cb_id: int; arg: pointer): int {.cdecl.}): int {.
    ...raises: [], tags: [].}

Set the callback to be used on listening SSL connections when the client hello is received.

The callback should return one of:

  • SSL_TLSEXT_ERR_OK
  • SSL_TLSEXT_ERR_ALERT_WARNING
  • SSL_TLSEXT_ERR_ALERT_FATAL
  • SSL_TLSEXT_ERR_NOACK
  Source   Edit
proc SSL_CTX_set_verify(s: SslCtx; mode: int;
                        cb: proc (a: int; b: pointer): int {.cdecl.}) {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc SSL_CTX_use_certificate_chain_file(ctx: SslCtx; filename: cstring): cint {.
    stdcall, dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc SSL_CTX_use_certificate_file(ctx: SslCtx; filename: cstring; typ: cint): cint {.
    stdcall, dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
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proc SSL_CTX_use_PrivateKey_file(ctx: SslCtx; filename: cstring; typ: cint): cint {.
    cdecl, dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
  Source   Edit
proc SSL_CTX_use_psk_identity_hint(ctx: SslCtx; hint: cstring): cint {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
Set PSK identity hint to use.   Source   Edit
proc SSL_free(ssl: SslPtr) {.cdecl, dynlib: DLLSSLName, importc, ...raises: [],
                             tags: [].}
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proc SSL_get0_verified_chain(ssl: SslPtr): PSTACK {.cdecl, dynlib: DLLSSLName,
    importc, ...raises: [], tags: [].}
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proc SSL_get_error(s: SslPtr; ret_code: cint): cint {.cdecl, dynlib: DLLSSLName,
    importc, ...raises: [], tags: [].}
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proc SSL_get_psk_identity(ssl: SslPtr): cstring {.cdecl, dynlib: DLLSSLName,
    importc, ...raises: [], tags: [].}
Get PSK identity.   Source   Edit
proc SSL_get_servername(ssl: SslPtr; typ: cint = TLSEXT_NAMETYPE_host_name): cstring {.
    cdecl, dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
Retrieve the server name requested in the client hello. This can be used in the callback set in SSL_CTX_set_tlsext_servername_callback to implement virtual hosting. May return nil.   Source   Edit
proc SSL_get_shutdown(ssl: SslPtr): cint {.cdecl, dynlib: DLLSSLName,
    importc: "SSL_get_shutdown", ...raises: [], tags: [].}
  Source   Edit
proc SSL_get_SSL_CTX(ssl: SslPtr): SslCtx {.cdecl, dynlib: DLLSSLName, importc,
    ...raises: [], tags: [].}
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proc SSL_get_verify_result(ssl: SslPtr): int {.cdecl, dynlib: DLLSSLName,
    importc, ...raises: [], tags: [].}
  Source   Edit
proc SSL_in_init(ssl: SslPtr): cint {....raises: [Exception, LibraryError],
                                      tags: [RootEffect].}
  Source   Edit
proc SSL_library_init(): cint {.discardable, ...raises: [Exception, LibraryError],
                                tags: [RootEffect].}
Initialize SSL using OPENSSL_init_ssl for OpenSSL >= 1.1.0 otherwise SSL_library_init   Source   Edit
proc SSL_load_error_strings() {....raises: [Exception], tags: [RootEffect].}
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proc SSL_new(context: SslCtx): SslPtr {.cdecl, dynlib: DLLSSLName, importc,
                                        ...raises: [], tags: [].}
  Source   Edit
proc SSL_pending(ssl: SslPtr): cint {.cdecl, dynlib: DLLSSLName, importc,
                                      ...raises: [], tags: [].}
  Source   Edit
proc SSL_read(ssl: SslPtr; buf: pointer; num: int): cint {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
  Source   Edit
proc SSL_set_fd(ssl: SslPtr; fd: SocketHandle): cint {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
  Source   Edit
proc SSL_set_shutdown(ssl: SslPtr; mode: cint) {.cdecl, dynlib: DLLSSLName,
    importc: "SSL_set_shutdown", ...raises: [], tags: [].}
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proc SSL_set_SSL_CTX(ssl: SslPtr; ctx: SslCtx): SslCtx {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
  Source   Edit
proc SSL_set_tlsext_host_name(ssl: SslPtr; name: cstring): int {....raises: [],
    tags: [].}
Set the SNI server name extension to be used in a client hello. Returns 1 if SNI was set, 0 if current SSL configuration doesn't support SNI.   Source   Edit
proc SSL_shutdown(ssl: SslPtr): cint {.cdecl, dynlib: DLLSSLName, importc,
                                       ...raises: [], tags: [].}
  Source   Edit
proc SSL_write(ssl: SslPtr; buf: cstring; num: int): cint {.cdecl,
    dynlib: DLLSSLName, importc, ...raises: [], tags: [].}
  Source   Edit
proc SSLCTXSetMode(ctx: SslCtx; mode: int): int {....raises: [], tags: [].}
  Source   Edit
proc sslDoHandshake(ssl: SslPtr): cint {.cdecl, dynlib: DLLSSLName,
    importc: "SSL_do_handshake", ...raises: [], tags: [].}
  Source   Edit
proc sslPeek(ssl: SslPtr; buf: cstring; num: cint): cint {.cdecl,
    dynlib: DLLSSLName, importc: "SSL_peek", ...raises: [], tags: [].}
  Source   Edit
proc sslRead(ssl: SslPtr; buf: cstring; num: cint): cint {.cdecl,
    dynlib: DLLSSLName, importc: "SSL_read", ...raises: [], tags: [].}
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proc sslSetAcceptState(s: SslPtr) {.cdecl, dynlib: DLLSSLName,
                                    importc: "SSL_set_accept_state", ...raises: [],
                                    tags: [].}
  Source   Edit
proc sslSetBio(ssl: SslPtr; rbio, wbio: BIO) {.cdecl, dynlib: DLLSSLName,
    importc: "SSL_set_bio", ...raises: [], tags: [].}
  Source   Edit
proc sslSetConnectState(s: SslPtr) {.cdecl, dynlib: DLLSSLName,
                                     importc: "SSL_set_connect_state",
                                     ...raises: [], tags: [].}
  Source   Edit
proc SSLv2_method(): PSSL_METHOD {....raises: [Exception, LibraryError],
                                   tags: [RootEffect].}
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proc SSLv3_method(): PSSL_METHOD {....raises: [Exception, LibraryError],
                                   tags: [RootEffect].}
  Source   Edit
proc SSLv23_client_method(): PSSL_METHOD {....raises: [Exception, LibraryError],
    tags: [RootEffect].}
  Source   Edit
proc SSLv23_method(): PSSL_METHOD {....raises: [Exception, LibraryError],
                                    tags: [RootEffect].}
  Source   Edit
proc sslWrite(ssl: SslPtr; buf: cstring; num: cint): cint {.cdecl,
    dynlib: DLLSSLName, importc: "SSL_write", ...raises: [], tags: [].}
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proc TLS_client_method(): PSSL_METHOD {....raises: [Exception, LibraryError],
                                        tags: [RootEffect].}
  Source   Edit
proc TLS_method(): PSSL_METHOD {....raises: [Exception, LibraryError],
                                 tags: [RootEffect].}
  Source   Edit
proc TLS_server_method(): PSSL_METHOD {....raises: [Exception, LibraryError],
                                        tags: [RootEffect].}
  Source   Edit
proc TLSv1_method(): PSSL_METHOD {.cdecl, dynlib: DLLSSLName, importc,
                                   ...raises: [], tags: [].}
  Source   Edit