hmac

Compute HMAC-SHA512 with secret key in java

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The simplest way can be – private static final String HMAC_SHA512 = “HmacSHA512”; private static String toHexString(byte[] bytes) { Formatter formatter = new Formatter(); for (byte b : bytes) { formatter.format(“%02x”, b); } return formatter.toString(); } public static String calculateHMAC(String data, String key) throws SignatureException, NoSuchAlgorithmException, InvalidKeyException { SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), HMAC_SHA512); Mac … Read more

java equivalent to php’s hmac-SHA1

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In fact they do agree. As Hans Doggen already noted PHP outputs the message digest using hexadecimal notation unless you set the raw output parameter to true. If you want to use the same notation in Java you can use something like for (byte b : digest) { System.out.format(“%02x”, b); } System.out.println(); to format the … Read more

Implementation HMAC-SHA1 in python

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Pseudocodish: def sign_request(): from hashlib import sha1 import hmac # key = b”CONSUMER_SECRET&” #If you dont have a token yet key = b”CONSUMER_SECRET&TOKEN_SECRET” # The Base String as specified here: raw = b”BASE_STRING” # as specified by OAuth hashed = hmac.new(key, raw, sha1) # The signature return hashed.digest().encode(“base64”).rstrip(‘\n’) Signature errors usually reside in the base-string, … Read more

Objective-C sample code for HMAC-SHA1 [closed]

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Here’s how you generate an HMAC using SHA-256: NSString *key; NSString *data; const char *cKey = [key cStringUsingEncoding:NSASCIIStringEncoding]; const char *cData = [data cStringUsingEncoding:NSASCIIStringEncoding]; unsigned char cHMAC[CC_SHA256_DIGEST_LENGTH]; CCHmac(kCCHmacAlgSHA256, cKey, strlen(cKey), cData, strlen(cData), cHMAC); NSData *HMAC = [[NSData alloc] initWithBytes:cHMAC length:sizeof(cHMAC)]; NSString *hash = [HMAC base64Encoding]; I’m not aware of an HOTP library, but the algorithm … Read more