cURL请求报NONCE_NOT_PROVIDED错误，疑为格式问题求助

Let's break down why you're hitting this error and fix it step by step:

1. The Core Issue: You're Not Sending the Nonce in Your Request #

The error message says it plainly—your API call isn't including the nonce value anywhere. Generating the nonce for the signature isn't enough; you must explicitly pass it in the request (as a query parameter, request body field, or header, depending on what the API expects).

Looking at your curl command:

curl -X GET -H "Accept: application/json" -H "..."

There's no sign of the nonce parameter here. For a GET request, this usually means adding it to the URL's query string. For example:

curl -X GET "https://your-api-endpoint.com/0?nonce=123" ...

2. Fix Potential Issues in Your Signature Generation #

Your current signature workflow has a suspicious detail that might break validation:

echo -n "123nonce=123" | openssl sha256 -binary >> tmp.bin

The leading 123 before nonce=123 looks like an accidental typo. Unless the API explicitly requires this prefix, it will generate an invalid signature. You should use the exact nonce value you're sending in the request—so this line should probably be:

echo -n "nonce=123" | openssl sha256 -binary >> tmp.bin

Also, double-check the API's signature rules to make sure you're combining the right data:

• Does it require including the HTTP method (e.g., GET) alongside the path and nonce?
• Are parameters supposed to be sorted alphabetically before hashing?
• Is your secret key actually base64-encoded (so the base64 -d step is necessary)?

3. Full Corrected Workflow Example #

Here's a refined version of your commands that includes the nonce in the request and fixes signature-related gaps:

# Define your parameters clearly
NONCE="123"  # Generate a new unique value for EVERY request!
API_PATH="/0"
BASE64_SECRET="mmyykkeeyy"

# Prepare the data to sign (adjust this to match the API's exact requirements)
echo -n "${API_PATH}nonce=${NONCE}" > tmp.bin

# Generate the HMAC-SHA512 signature
SIGNATURE=$(cat tmp.bin | openssl sha512 -binary -hmac $(echo -n "${BASE64_SECRET}" | base64 -d) | base64 -w 0)

# Send the request with both the nonce (in URL) and signature (in headers)
curl -X GET "https://your-api-domain.com${API_PATH}?nonce=${NONCE}" \
  -H "Accept: application/json" \
  -H "Authorization: HMAC-SHA512 ${SIGNATURE}"  # Adjust the header name to match the API's requirements

Key Notes to Avoid Future Headaches #

• Nonce Uniqueness: Never reuse a nonce—generate a new random value for every request (e.g., use $(date +%s%N) for a timestamp-based nonce that's guaranteed unique).
• Signature Exactness: Even a tiny mismatch (extra space, wrong parameter order) will invalidate your signature. Cross-reference every step with the API's official docs.
• Header Format: Make sure you're sending the signature in the correct header (common names are Authorization, X-Signature, or HMAC-Signature).

内容的提问来源于stack exchange，提问作者mine