snailstock | 蜗牛股票量化分析软件开源啦 - 蜗牛股票量化分析软件开源了 使用帮助请参考 - 蜗牛股票量化分析软件使用帮助 | Cryptography library
kandi X-RAY | snailstock Summary
kandi X-RAY | snailstock Summary
蜗牛股票量化分析软件开源了 使用帮助请参考 - 蜗牛股票量化分析软件使用帮助. buy.close,0>ma,5,0 含义:量化日收盘价格超过当日5日均线则构成一个买点 buy.close,-1>ma,5,-1 含义:量化前一日满足收盘价超过当日5日均线则构成一个买点 软件量化配置项 标准软件指令分为3个类型,分别是配置项,买点以及卖点。配置项用于软件和量化参数的配置;买点和卖点用于设定股票买入以及卖出条件。对多个买点,同时满足则为策略买入条件;对于多个卖点,满足一个则为卖出条件. config.source.pool=6000** config.source.pool=000*** config.source.pool=0001 config.source.pool=0009 config.source.pool=300506,000056 config.source.pool=随机50 config.source.pool=我的股票池 设定回测股票池,如果参数值为随机50,随机100,随机300之一,则实际股票池为随机选出的50,100或者300个股票;如果为我的股票池,则之前需要在菜单配置-股票池中自定义股票池清单;如果使用类似000***等包含通配符的模式,则股票池为参考股票代码以000开头的股票列表;如果股票池为类似300506,000056模式则以给定股票列表为准 NOTE:免费版本不支持通配符类型的股票池. config.trade.buy.movepoint=1.0 设定股票买入滑动涨跌幅,含义为以第二日开盘涨跌上浮给定涨幅为买入点,如果该涨幅无法买入,则指定股票不纳入统计;可选范围为[-2.0 - 2.0],默认为0.0. close,0 ma,5,0 sea.大阳线,0 即为指令元 下面逐一介绍指令元. ohlc.increase,flag,offset 获取股票给定类型的涨幅 flag=1,结果为开盘价相对于昨日涨幅 flag=2,结果为最高价相对于昨日涨幅 flag=3,结果为最低价相对于昨日涨幅. ohlc.swing,flag,offset flag=1,计算最高价相对于开盘价,收盘价平均的涨幅 flag=2,计算股票开盘价,收盘价平均相对于最低价的涨幅 flag=3,计算股票收盘价相对于开盘价涨幅 flag=4,计算股票开盘价相对于最低价的涨幅 flag=5,计算股票最高价相对于收盘价涨幅. boll.upper,offset boll.mid,offset boll.lower,offset boll.width,offset 以上指令分别用于获取布林通道(20,2)的上轨,中轨,下轨和轨道宽度(boll.width=boll.upper-boll.mid). boll.upper,n,m,offset boll.mid,n,m.offset boll.width,n,m,offset 其中n为布林指标中的取点数,m为布林带宽度系数,boll.width计算公式为*(boll.upper-boll.mid)/boll.mid100.0 MA/EMA/VOLMA指令元系列. macd.diff,offset macd.bar,offset macd.dea,offset 获取股票MACD的diff,bar和dea值,默认参数为12,26,9 对于收费版本,可以自定义MACD参数,格式如下. macd.diff,a,b,c,offset macd.bar,a,b,c,offset macd.dea,a,b,c,offset KDJ指令元. kdj.k,offset kdj.d,offset kdj.j,offset 获取股票日线KDJ的k,d,j值,默认参数为9,3,3. dmi.pdi,n,m,offset dmi.mdi,n,m,offset dmi.adx,n,m,offset dmi.adxr,n,m,offset 获取过DMI指标的pdi,mdi,adx和adxr值,指定参数为n,m,默认为14,6. tr,offset 获取股价真实波动值,如果需要atr值,请参考如下代码 @tr=tr,0 @atr=ma[@tr,value,14.0].
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of snailstock
snailstock Key Features
snailstock Examples and Code Snippets
Community Discussions
Trending Discussions on Cryptography
QUESTION
I'm trying to achieve the exact opposite of this here where I need to sign a payload in Python using ECDSA and be able to verify the signature in JS.
Here is my attempt, but I'm pretty sure I'm missing something with data transformation on either or both ends.
(Key types are the same as in the answer provided to the question above)
I've tried some other variations but nothing worked so far.
(The verification on JS returns False)
Python:
...ANSWER
Answered 2022-Apr-10 at 18:16The main problem is that both codes use different signature formats:
sign_payload()
in the Python code generates an ECDSA signature in ASN.1/DER format. The WebCrypto API on the other hand can only handle the IEEE P1363 format.
Since the Python Cryptography library is much more convenient than the low level WebCrypto API it makes sense to do the conversion in Python code.
The following Python code is based on your code, but additionally performs the transformation into the IEEE P1363 format at the end:
QUESTION
In .NET 6 code from How can I SHA512 a string in C#?
...ANSWER
Answered 2021-Nov-27 at 16:16In my case I was using RNGCryptoServiceProvider in .NET 5 but when I updated to .NET 6 I got the same warning. After reading about it in this issue I changed my code from this:
QUESTION
Based on the example provided here on how to establish a shared secret and derived key between JS (Crypto-JS) and Python, I can end up with the same shared secret and derived key on both ends.
However, when I try to encrypt as below, I cannot find a way to properly decrypt from Python. My understanding is that probably I am messing with the padding or salts and hashes.
...ANSWER
Answered 2022-Mar-28 at 11:29The issue is that the key is not passed correctly in the CryptoJS code.
The posted Python code generates LefjQ2pEXmiy/nNZvEJ43i8hJuaAnzbA1Cbn1hOuAgA=
as Base64-encoded key. This must be imported in the CryptoJS code using the Base64 encoder:
QUESTION
Everytime I publish my Blazor Server-project to my website domain, and opening the website, this exception occurs, and there's little to no help Googling it:
And it says AppState.cs: line 21
, so here's the codeline for it:
This exception is not happening under debugging localhost. When I delete localStorage from the browser on my website, and refreshing, then everything works. But I don't want my customers having this exception and having to tell them to delete the localstorage everytime I'm publishing.
My Program.cs if necessary:
...ANSWER
Answered 2022-Mar-16 at 13:16Try to set Load User Profile
to true in your IIS
app pool in the advanced settings.
see this answer, I hope that will help you!
QUESTION
I'm experimenting with Chaum's blind signature, and what I'm trying to do is have the blinding and un-blinding done in JavaScript, and signing and verifying in Java (with bouncy castle). For the Java side, my source is this, and for JavaScript, I found blind-signatures. I've created two small codes to play with, for the Java side:
...ANSWER
Answered 2021-Dec-13 at 14:56The blind-signature library used in the NodeJS code for blind signing implements the process described here:
BlindSignature.blind()
generates the SHA256 hash of the message and determines the blind message m' = m * re mod N.BlindSignature.sign()
calculates the blind signature s' = (m')d mod N.BlindSignature.unblind()
determines the unblind signature s = s' * r-1 mod N.BlindSignature.verify()
decrypts the unblind signature (se) and compares the result with the hashed message. If both are the same, the verification is successful.
No padding takes place in this process.
In the Java code, the implementation of signing the blind message in signConcealedMessage()
is functionally identical to BlindSignature.sign()
.
In contrast, the verification in the Java code is incompatible with the above process because the Java code uses PSS as padding during verification.
A compatible Java code would be for instance:
QUESTION
We are trying to make a JWT token for Apple Search Ads using the KJUR jws library. We are using the API documents from Apple:
We are generating a private key (prime256v1 curve):
openssl ecparam -genkey -name prime256v1 -noout -out private-key.pem
Next we are generating a public key from the private key:
openssl ec -in private-key.pem -pubout -out public-key.pem
Next we setup the header and payload:
...ANSWER
Answered 2022-Mar-02 at 07:47The issue is caused by an incorrect import of the key.
The posted key is a PEM encoded private key in SEC1 format. In getKey()
the key is passed in JWK format, specifying the raw private key d
. The PEM encoded SEC1 key is used as the value for d
. This is incorrect because the raw private key is not identical to the SEC1 key, but is merely contained within it.
To fix the problem, the key must be imported correctly. jsrsasign also supports the import of a PEM encoded key in SEC1 format, but then it also needs the EC parameters, s. e.g. here. For prime256v1 aka secp256r1 this is:
QUESTION
I trying to get the RSA signature as described in Annex A2.1 of EMV book 2. As I understand it was described in ISO9796-2 as scheme 1, option 1. So, the resulting signature should contain a Header equal to '6A' and a Trailer equal to 'BC'.
The algorithms ALG_RSA_SHA_ISO9796 and ALG_RSA_SHA_ISO9796_MR are the only suitable that I could find. But they acting like scheme 1, option 2 with a Trailer equal to '33cc'
Is it possible to get a signature with Trailer = 'BC'?
Javacard example code:
...ANSWER
Answered 2022-Feb-24 at 10:46You can generate such signature using Cipher.ALG_RSA_NOPAD
in decrypt mode.
Pseudocode:
QUESTION
Hello I am trying to transfer a custom SPL token with the solana-wallet adapter. However i am having trouble getting the wallet's secret key/signing the transaction.
I've looked at these answers for writing the transfer code but i need to get the Singer and i have trouble figuring out how with solana-wallet adapter. These examples hardcode the secret key and since i'm using a wallet extension this is not possible.
How can you transfer SOL using the web3.js sdk for Solana?
How to transfer custom token by '@solana/web3.js'
according to this issue on the webadapter repo https://github.com/solana-labs/wallet-adapter/issues/120 you need to:
- Create a @solana/web3.js Transaction object and add instructions to it
- Sign the transaction with the wallet
- Send the transaction over a Connection
But i am having difficulty finding examples or documentation as to how to do step 1 and 2.
...ANSWER
Answered 2021-Dec-06 at 13:51So i found a way to do this, it requires some cleanup and error handling but allows for a custom token transaction via @solana/wallet-adapter
.
QUESTION
I have a base64-encoded public key in DER format. In Python, how can I convert it into a COSE key?
Here is my failed attempt:
...ANSWER
Answered 2022-Jan-01 at 07:49The posted key is an EC key for curve P-256 in X.509 format.
With an ASN.1 parser (e.g. https://lapo.it/asn1js/) the x and y coordinates can be determined:
QUESTION
I'm switching from the pure Python ecdsa
library to the much faster coincurve
library for signing data. I would also like to switch to coincurve
for verifying the signatures (including the old signatures created by the ecdsa
library).
It appears that signatures created with ecdsa
are not (always?) valid in coincurve
. Could someone please explain why this is not working? Also, it seems that cryptography
library is able to validate both ecdsa
signatures and coincurve
signatures without issues, consistently.
What is even more confusing, if you run below script a few times, is that sometimes it prints point 3 and other times it does not. Why would coincurve
only occasionally find the signature valid?
ANSWER
Answered 2021-Dec-25 at 14:41Bitcoin and the coincurve library use canonical signatures while this is not true for the ecdsa library.
What does canonical signature mean?
In general, if (r,s)
is a valid signature, then (r,s') := (r,-s mod n)
is also a valid signature (n
is the order of the base point).
A canonical signature uses the value s' = -s mod n = n - s
instead of s
, i.e. the signature (r, n-s)
, if s > n/2
, s. e.g. here.
All signatures from the ecdsa library that were not been successfully validated by the coincurve library in your test program have an s > n/2
and thus are not canonical, whereas those that were successfully validated are canonical.
So the fix is simply to canonize the signature of the ecdsa library, e.g.:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install snailstock
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page