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Example ¶ ↑

key = 'key'
data = 'The quick brown fox jumps over the lazy dog'
digest = OpenSSL::Digest.new('sha1')
hmac = OpenSSL::HMAC.digest(digest, key, data)
#=> "\xDE|\x9B\x85\xB8\xB7\x8A\xA6\xBC\x8Az6\xF7\n\x90p\x1C\x9D\xB4\xD9"
    StringValue(key);
    StringValue(data);
    buf = HMAC(GetDigestPtr(digest), RSTRING_PTR(key), RSTRING_LENINT(key),
               (unsigned char *)RSTRING_PTR(data), RSTRING_LEN(data), NULL, &buf_len);
    return rb_str_new((const char *)buf, buf_len);
          Returns the authentication code as a hex-encoded string. The digest parameter must be an instance of OpenSSL::Digest.
Example¶ ↑
key = 'key'
data = 'The quick brown fox jumps over the lazy dog'
digest = OpenSSL::Digest.new('sha1')
hmac = OpenSSL::HMAC.hexdigest(digest, key, data)
#=> "de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9"
ossl_hmac_s_hexdigest(VALUE klass, VALUE digest, VALUE key, VALUE data)
    unsigned char *buf;
    char *hexbuf;
    unsigned int buf_len;
    VALUE hexdigest;
    StringValue(key);
    StringValue(data);
    buf = HMAC(GetDigestPtr(digest), RSTRING_PTR(key), RSTRING_LENINT(key),
               (unsigned char *)RSTRING_PTR(data), RSTRING_LEN(data), NULL, &buf_len);
    if (string2hex(buf, buf_len, &hexbuf, NULL) != 2 * (int)buf_len) {
        ossl_raise(eHMACError, "Cannot convert buf to hexbuf");
    hexdigest = ossl_buf2str(hexbuf, 2 * buf_len);
    return hexdigest;
          Returns an instance of OpenSSL::HMAC set with the key and digest algorithm to be used. The instance represents the initial state of the message authentication code before any data has been processed. To process data with it, use the instance method update with your data as an argument.
Example¶ ↑
key = 'key'
digest = OpenSSL::Digest.new('sha1')
instance = OpenSSL::HMAC.new(key, digest)
#=> f42bb0eeb018ebbd4597ae7213711ec60760843f
instance.class
#=> OpenSSL::HMAC
A note about comparisons¶ ↑
Two instances won't be equal when they're compared, even if they have the same value. Use to_s or hexdigest to return the authentication code that the instance represents. For example:
other_instance = OpenSSL::HMAC.new('key', OpenSSL::Digest.new('sha1'))
#=> f42bb0eeb018ebbd4597ae7213711ec60760843f
instance
#=> f42bb0eeb018ebbd4597ae7213711ec60760843f
instance == other_instance
#=> false
instance.to_s == other_instance.to_s
#=> true
    StringValue(key);
    GetHMAC(self, ctx);
    HMAC_Init(ctx, RSTRING_PTR(key), RSTRING_LENINT(key),
                 GetDigestPtr(digest));
    return self;
Example¶ ↑
instance = OpenSSL::HMAC.new('key', OpenSSL::Digest.new('sha1'))
#=> f42bb0eeb018ebbd4597ae7213711ec60760843f
instance.digest
#=> "\xF4+\xB0\xEE\xB0\x18\xEB\xBDE\x97\xAEr\x13q\x1E\xC6\a`\x84?"
    GetHMAC(self, ctx);
    hmac_final(ctx, &buf, &buf_len);
    digest = ossl_buf2str((char *)buf, buf_len);
    return digest;
    GetHMAC(self, ctx);
    hmac_final(ctx, &buf, &buf_len);
    if (string2hex(buf, buf_len, &hexbuf, NULL) != 2 * (int)buf_len) {
        OPENSSL_free(buf);
        ossl_raise(eHMACError, "Memory alloc error");
    OPENSSL_free(buf);
    hexdigest = ossl_buf2str(hexbuf, 2 * buf_len);
    return hexdigest;
          Returns self as it was when it was first initialized, with all processed data cleared from it.
Example¶ ↑
data = "The quick brown fox jumps over the lazy dog"
instance = OpenSSL::HMAC.new('key', OpenSSL::Digest.new('sha1'))
#=> f42bb0eeb018ebbd4597ae7213711ec60760843f
instance.update(data)
#=> de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9
instance.reset
#=> f42bb0eeb018ebbd4597ae7213711ec60760843f
          Returns self updated with the message to be authenticated. Can be called repeatedly with chunks of the message.
Example¶ ↑
first_chunk = 'The quick brown fox jumps '
second_chunk = 'over the lazy dog'
instance.update(first_chunk)
#=> 5b9a8038a65d571076d97fe783989e52278a492a
instance.update(second_chunk)
#=> de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9
    StringValue(data);
    GetHMAC(self, ctx);
    HMAC_Update(ctx, (unsigned char *)RSTRING_PTR(data), RSTRING_LEN(data));
    return self;