How to view the ASN.1 structure of an DSA public key using the OpenSSL "asn1parse" command?

You can use the OpenSSL "asn1parse" command to view the ASN.1 structure of an DSA public key as shown in the test below:

C:\Users\fyicenter>\local\openssl\openssl 
   pkey -in dsa_pri.key -pubout -out dsa_pub.key

C:\Users\fyicenter>\local\openssl\openssl asn1parse -in dsa_pub.key -i
    0:d=0  hl=3 l= 240 cons: SEQUENCE
    3:d=1  hl=3 l= 168 cons:  SEQUENCE
    6:d=2  hl=2 l=   7 prim:   OBJECT            :dsaEncryption
   15:d=2  hl=3 l= 156 cons:   SEQUENCE
   18:d=3  hl=2 l=  65 prim:    INTEGER           :B2A22FE456DD10930CEED27DE2E58
E69E27CB52E14BE655C5D0F4EDC4A627A800A211DABD9B07D974EF3C997DD198E31C2B238696CBF5
E9984B1EE3D11B2D9E3
   85:d=3  hl=2 l=  21 prim:    INTEGER           :A17145E13E0034692FC1BD85BDF88
E1AA578818D
  108:d=3  hl=2 l=  64 prim:    INTEGER           :79F4E4FB123458BFDD388E0CC90D7
76C3CBB9C82E10668C71318D322AF5968EE8FB9F64F9AC09A9AAA24AD8DED795B7CE4BB81E02047A
AC4D3E95513AA8FD5DD
  174:d=1  hl=2 l=  67 prim:  BIT STRING

C:\Users\fyicenter>\local\openssl\openssl 
   asn1parse -in dsa_pub.key -strparse 174
    0:d=0  hl=2 l=  64 prim: INTEGER           :424A04378703B51FAD65CEC2C59BF6FA
2CD40AA64C43975B564004519798E5B2FCC74D4DE407B73812341ABBCE0878CD2CA23A4501992E63
842531BCAA7A9702  

C:\Users\fyicenter>\local\openssl\openssl 
   pkey -pubin -in dsa_pub.key -text -noout
pub:
    42:4a:04:37:87:03:b5:1f:ad:65:ce:c2:c5:9b:f6:
    fa:2c:d4:0a:a6:4c:43:97:5b:56:40:04:51:97:98:
    e5:b2:fc:c7:4d:4d:e4:07:b7:38:12:34:1a:bb:ce:
    08:78:cd:2c:a2:3a:45:01:99:2e:63:84:25:31:bc:
    aa:7a:97:02
P:
    00:b2:a2:2f:e4:56:dd:10:93:0c:ee:d2:7d:e2:e5:
    8e:69:e2:7c:b5:2e:14:be:65:5c:5d:0f:4e:dc:4a:
    62:7a:80:0a:21:1d:ab:d9:b0:7d:97:4e:f3:c9:97:
    dd:19:8e:31:c2:b2:38:69:6c:bf:5e:99:84:b1:ee:
    3d:11:b2:d9:e3
Q:
    00:a1:71:45:e1:3e:00:34:69:2f:c1:bd:85:bd:f8:
    8e:1a:a5:78:81:8d
G:
    79:f4:e4:fb:12:34:58:bf:dd:38:8e:0c:c9:0d:77:
    6c:3c:bb:9c:82:e1:06:68:c7:13:18:d3:22:af:59:
    68:ee:8f:b9:f6:4f:9a:c0:9a:9a:aa:24:ad:8d:ed:
    79:5b:7c:e4:bb:81:e0:20:47:aa:c4:d3:e9:55:13:
    aa:8f:d5:dd  

Note about the test:

• The ASN.1 structure of a DSA public key is identical to the DSA private key, except that the public integer is wrapped in an BIT STRING instead of an OCTET STRING.
• The ASN.1 structure of a DSA public key has no version field.

⇒ OpenSSL "ans1parse" - Configuration File for DSA Public Key

⇐ OpenSSL "ans1parse" - Configuration File for DSA Private Key

⇑ OpenSSL "ans1parse" Command

⇑⇑ OpenSSL Tutorials