Re: “EC PUBLIC KEY”

On 17/11/2021 21:49, Michael Wojcik wrote: Further on this, I'd like to know where the OP got a file with a "BEGIN EC PUBLIC KEY" header. Various discussions elsewhere (including one from this list in 2017) cast doubt on the existence of any such beast. AFAIK no such for

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Re: “EC PUBLIC KEY”

On Wed, Nov 17, 2021 at 11:11:58AM -0500, Felipe Gasper wrote: > Does OpenSSL intend to handle EC public keys that in PEM begin “BEGIN EC > PUBLIC KEY”? I doubt it, but there is: $ openssl genpkey -algorithm ec -pkeyopt ec_paramgen_curve:prime256v1 | openssl ec read

Re: “EC PUBLIC KEY”

On Wed, Nov 17, 2021 at 10:37:01PM -0500, Felipe Gasper wrote: > It came from my own (very incomplete) crypto implementation. > (https://github.com/FGasper/p5-Crypt-Perl) It looks like I just had > the wrong idea about EC public keys back-when. > > Funny thing is that the “EC PUB

Re: “EC PUBLIC KEY”

> On Nov 17, 2021, at 16:49, Michael Wojcik > wrote: > >> From: Michael Wojcik >> Sent: Wednesday, 17 November, 2021 14:22 >> To: openssl-users@openssl.org >> Subject: RE: “EC PUBLIC KEY” >> >>> From: openssl-users On Behalf Of >> Billy

RE: “EC PUBLIC KEY”

> From: Michael Wojcik > Sent: Wednesday, 17 November, 2021 14:22 > To: openssl-users@openssl.org > Subject: RE: “EC PUBLIC KEY” > > > From: openssl-users On Behalf Of > Billy > > Brumley > > Sent: Wednesday, 17 November, 2021 12:40 > > To: openssl-use

RE: “EC PUBLIC KEY”

> From: openssl-users On Behalf Of Billy > Brumley > Sent: Wednesday, 17 November, 2021 12:40 > To: openssl-users@openssl.org > Subject: Re: “EC PUBLIC KEY” > > That's an ed25519 key. Not an ECC key. They are different formats, at > both the OID and asn1 structure level

Re: “EC PUBLIC KEY”

em > > This uses the PEM header "BEGIN PUBLIC KEY", but it's an ECC public key in > PEM format. That's an ed25519 key. Not an ECC key. They are different formats, at both the OID and asn1 structure levels. > This version of OpenSSL doesn't recognize "BEGIN EC PUBLIC KEY

RE: “EC PUBLIC KEY”

> From: openssl-users On Behalf Of > Felipe Gasper > Sent: Wednesday, 17 November, 2021 09:12 > To: openssl-users@openssl.org > Subject: “EC PUBLIC KEY” > > Does OpenSSL intend to handle EC public keys that in PEM begin > “BEGIN EC PUBLIC KEY”? > >

“EC PUBLIC KEY”

Hello, Does OpenSSL intend to handle EC public keys that in PEM begin “BEGIN EC PUBLIC KEY”? I can’t find a way to output this format and am not sure if it’s actually defined anywhere, but it seems like a logical analogue to the default/legacy RSA public key format

Re: [openssl-users] Problems with deriving EC public key from private

On Dec 17, 2018, at 11:42 PM, Billy Brumley wrote: > > But 0.4% is suspiciously close to 1/256, so I'm willing to bet your > problem surrounds your size assumptions in various functions. Check > the manpage of e.g. EC_POINT_point2oct and grep for usage in the > library, but the idea is to pass

Re: [openssl-users] Problems with deriving EC public key from private

On Tue, Dec 18, 2018 at 12:07 AM Mike Blaguszewski wrote: > > Some code of mine reads a NIST P256 private key from bytes and derives the > public key from it, and this derived public key is incorrect about 0.4% of > the time. I’ve attached a sample program that does the following. > > 1.

[openssl-users] Problems with deriving EC public key from private

Some code of mine reads a NIST P256 private key from bytes and derives the public key from it, and this derived public key is incorrect about 0.4% of the time. I’ve attached a sample program that does the following. 1. Generate a key-pair of type NID_X9_62_prime256v1 2. Write the public and

Re: [openssl-users] Encrypting using EC public key

N1 method decode/encode the appropriate parameters from the CMS ASN1 data and send appropriate data to the EC public key method. And further refinements in later commits. -- Viktor. -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users

Re: [openssl-users] Encrypting using EC public key

On 15/01/17 03:47, Norm Green wrote: > Is there a way to encrypt a file using the openssl command with an > elliptic curve public key? Here's what I get when I try using OpenSSL > 1.1.0c : OpenSSL only supports ECDH (for key exchange) and ECDSA (for digital signatures) for elliptic curve keys,

[openssl-users] Encrypting using EC public key

Is there a way to encrypt a file using the openssl command with an elliptic curve public key? Here's what I get when I try using OpenSSL 1.1.0c : normg>./openssl pkeyutl -encrypt -pubin -inkey secp256k1-public-key.pem -in a.txt -out a.txt.enc pkeyutl: Error initializing context

Re: [openssl-users] RDRAND and engine (was: how to generate EC public key from EC private key)

Thank you - employing the pointers (no pun intended :) that you gave, the code now is doing exactly what’s needed, and utilizes RDRAND (as required by the specs I have, and my personal preferences as well). > set the default RAND_method to the engine This is what I did not do originally -

Re: [openssl-users] RDRAND and engine (was: how to generate EC public key from EC private key)

On Tue, Mar 22, 2016 at 6:54 PM, Jeffrey Walton wrote: >> Now one small question: how do I ensure that ‎RAND_engine (and therefore >> Intel RDRAND output) is being used for the key generation in >>EVP_PKEY_keygen(ctx, ); >> >> Is just loading RAND_engine enough for that?‎

[openssl-users] RDRAND and engine (was: how to generate EC public key from EC private key)

> Now one small question: how do I ensure that ‎RAND_engine (and therefore > Intel RDRAND output) is being used for the key generation in >EVP_PKEY_keygen(ctx, ); > > Is just loading RAND_engine enough for that?‎ > ‎ To verify it, I think you need to inspect the default RAND method. Its

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

 10 smartphone on the Verizon Wireless 4G LTE network.   Original Message   From: Viktor Dukhovni‎ Sent: Sunday, March 20, 2016 22:39‎ To: openssl-users@openssl.org Reply To: openssl-users@openssl.org Subject: Re: [openssl-users] Naive: how to generate EC public key from EC private key

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

Viktor and Jeffrey, Thank you! Now I understand. And it works. ;) -- Regards, Uri Blumenthal On 3/20/16, 22:38, "openssl-users on behalf of Viktor Dukhovni" wrote: > >> On Mar 20, 2016, at 10:32 PM, Blumenthal, Uri -

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

> On Mar 20, 2016, at 10:32 PM, Blumenthal, Uri - 0553 - MITLL > wrote: > > dup_ekey = EVP_PKEY_get1_EC_KEY(pubkey); > group = (EC_GROUP*) EC_KEY_get0_group(dup_ekey); Declare the group as: const EC_GROUP *group; Then: group = EC_KEY_get0_group(); > nid =

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

> 2. For some reason the following code does not work - subsequent requests > that involve pub key fail: > > dup_ekey = EVP_PKEY_get1_EC_KEY(pubkey); > group = (EC_GROUP*) EC_KEY_get0_group(dup_ekey); > nid = EC_GROUP_get_curve_name(group); > printf("wrap: Deriving ECC keys over curve

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

Thank you!! Now the code works (using the outline Stephen suggested, as it is simpler :)! I still have a few questions/issues. 1. EVP_PKEY_get0_EC_KEY(key) is only defined for 1.1. I had to use EVP_PKEY_get1_EC_KEY(key) with 1.0.2g. (this is not a problem - just a remark) 2. For some reason

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

> On Mar 17, 2016, at 5:17 PM, Blumenthal, Uri - 0553 - MITLL > wrote: > > I’ve an extremely naïve question. I am generating ephemeral EC keys for ECDH, > following the example in > https://wiki.openssl.org/index.php/EVP_Key_and_Parameter_Generation > > But it looks like

[openssl-users] Naive: how to generate EC public key from EC private key?

I’ve an extremely naïve question. I am generating ephemeral EC keys for ECDH, following the example in https://wiki.openssl.org/index.php/EVP_Key_and_Parameter_Generation But it looks like the example ends on generation of the private key: /* Generate the key */ if (!EVP_PKEY_keygen(kctx, )) goto

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

;>http://openssl.org/docs/manmaster/crypto/EC_KEY_key2buf.html >>> to extract EC public key octets. >> >>That's only available in the master branch, only encodes the key value >>and not >>its parameters and of course it only works for EC. > >Got it. I’l

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

On Fri, Mar 18, 2016 at 06:59:36PM +, Blumenthal, Uri - 0553 - MITLL wrote: > Answered my own question: should use EVP_PKEY_bits(pkey) instead. That's not the right way to determine the curve id. > >How do I determine what curve the above key is on? For that you need to determine the

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

; openssl-users@openssl.org Reply To: openssl-users@openssl.org Subject: Re: [openssl-users] Naive: how to generate EC public key from EC private key? Great! Say, I want to extract the public key and make it available to another entity or module? Possibly DER-encoded, though I'd like to learn

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

sk. > > Well you can work with > http://openssl.org/docs/manmaster/crypto/EC_KEY_key2buf.html > to extract EC public key octets. That's only available in the master branch, only encodes the key value and not its parameters and of course it only works for EC. > If you want an ASN.1 e

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

 network.   Original Message   From: Viktor Dukhovni Sent: Thursday, March 17, 2016 17:57 To: openssl-users@openssl.org Reply To: openssl-users@openssl.org Subject: Re: [openssl-users] Naive: how to generate EC public key from EC private key? > On Mar 17, 2016, at 5:17 PM, Blumenthal,

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

>http://openssl.org/docs/manmaster/crypto/EC_KEY_key2buf.html >> to extract EC public key octets. > >That's only available in the master branch, only encodes the key value >and not >its parameters and of course it only works for EC. Got it. I’ll not use it, as it’s too speci

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

uf.html to extract EC public key octets. If you want an ASN.1 encoded "SPKI" object (i.e. an X509_PUBKEY in OpenSSL) then you can use X509_PUBKEY *pk = NULL; unsigned char *buf = NULL; EVP_PKEY *key; key = ... ; /* Get a keypair */

Re: [openssl-users] Naive: how to generate EC public key from EC private key?

On Fri, Mar 18, 2016, Viktor Dukhovni wrote: > On Fri, Mar 18, 2016 at 06:59:36PM +, Blumenthal, Uri - 0553 - MITLL > wrote: > > > Answered my own question: should use EVP_PKEY_bits(pkey) instead. > > That's not the right way to determine the curve id. > > > >How do I determine what curve

Obtaining EC Public Key from X509 PEM endcoded cert

Hi all, As the subject says I'm grabbing a public key from a PEMK encoded X509 cert and I compute the SHA-1 hash over this to create a signer id. This is done by using PEM_read_X509 to read the PEM cert into an x509 struct, using X509_get_pubkey to obtain the public key as an EVP_PKEY from

Re: Obtaining EC Public Key from X509 PEM endcoded cert

On Wed, Mar 11, 2009 at 12:10:47PM -0700, Larson, John wrote: As the subject says I'm grabbing a public key from a PEMK encoded X509 cert and I compute the SHA-1 hash over this to create a signer id. This is done by using PEM_read_X509 to read the PEM cert into an x509 struct, using

RE: Obtaining EC Public Key from X509 PEM endcoded cert

Identifier as hoped, thanks! -John Larson -Original Message- From: owner-openssl-us...@openssl.org [mailto:owner-openssl-us...@openssl.org] On Behalf Of Victor Duchovni Sent: Wednesday, March 11, 2009 12:21 PM To: openssl-users@openssl.org Subject: Re: Obtaining EC Public Key from X509 PEM

Re: Obtaining EC Public Key from X509 PEM endcoded cert

Hi John: On March 11, 2009 03:10:47 pm Larson, John wrote: Hi all, As the subject says I'm grabbing a public key from a PEMK encoded X509 cert and I compute the SHA-1 hash over this to create a signer id. This is done by using PEM_read_X509 to read the PEM cert into an x509 struct, using

Obtaining EC Public Key from X.509 cert

EC Public Key: pub: 04:00:71:b0:b1:69:5c:a2:db:26:fa:ef:96:d7:83: a3:1c:a6:44:4b:1b:5f:e7:a7:6f:dd:08:53:32:1e: b3:fc:73:87:a2:e3:90:fa:04:77:da:18:4f:58:49: fa:cd:78:1f:e6:3f:c4:70:a9:5a

What meams first byte '04' in EC public key?

this message in context: http://www.nabble.com/What-meams-first-byte-%2704%27-in-EC-public-key--tf4532762.html#a12935481 Sent from the OpenSSL - User mailing list archive at Nabble.com. __ OpenSSL Project

Re: What meams first byte '04' in EC public key?

Hello, I created EC keypair via JAVA with secp160r2 template. When I looked at text form of public key, I saw there this: 04666d59b1fb53c1c998c12c71731d3a36a37cd995cadeee96c156c8d7c7852b39b5fefd1fa3ce18c7 I know that last 40 bytes present x and y number of ec point but I don't know what

Re: EC public key info

Hello, I create ec key pair with secp160r2 curve and I need to achieve information from public key in der format as: EC Public Key: pub: 04:66:6d:59:b1:fb:53:c1:c9:98:c1:2c:71:73:1d: 3a:36:a3:7c:d9:95:ca:de:ee:96:c1:56:c8:d7:c7

EC public key info

Hello everybody I have some questions. I create ec key pair with secp160r2 curve and I need to achieve information from public key in der format as: EC Public Key: pub: 04:66:6d:59:b1:fb:53:c1:c9:98:c1:2c:71:73:1d: 3a:36:a3:7c:d9:95

Re: EC public key info

Hello, My question is: how many bytes does public key(EC or RSA) takes in X509 certificate ? 64B for EC and 162B for RSA. Does X509 contain whole RSA public key structure(162) in itself or only 1024bit modulus and 4 bytes for exponent ? Does Public key for RSA in X509 contains ASN.1 SEQUENCE